Patent Application
20170014770
Field of the Invention
The invention relates to a seawater desalination device, a method for desalinating seawater using the same, and a method for cleaning the seawater desalination device.
Description of the Related Art
A typical seawater desalination method includes: precise filtration, pressurizing the seawater using a pressure pump, and preparation of the freshwater using a reverse osmosis membrane. However, when the pressure pump stops working, the seawater in the pressure pump and reverse osmosis membrane remains in and degrades the pressure pump and the reverse osmosis membrane. In addition, conventional cleaning methods of the reverse osmosis membrane are complex, which greatly slows down the maintenance of seawater desalination equipment.
It is one objective of the invention to provide a seawater desalination device having two-way integrated control valves, a method for desalinating seawater using the same, and a method for cleaning the seawater desalination device. It is another objective to provide a seawater desalination device having two-position three-way solenoid valves, a method for desalinating seawater using the same, and a method for cleaning the seawater desalination device, in which, the two-way integrated control valves are substituted by the two-position three-way solenoid valves, and both the production cost and the fault rate of the system are reduced.
To achieve the above objective, in accordance with one embodiment of the invention, there is provided a seawater desalination device. The seawater desalination device comprises: a seawater introducing and filtering device, a seawater reverse osmosis filtering device, and a control circuit. The seawater reverse osmosis filtering device comprises a first control valve and a second control valve. The seawater introducing and filtering device is connected to the first control valve of the seawater reverse osmosis filtering device. The second control valve is disposed at a terminal pipe of the seawater reverse osmosis filtering device. The control circuit is adapted to control operation of the seawater reverse osmosis filtering device.
In a class of this embodiment, the seawater introducing and filtering device comprises: a seawater inlet valve, a seawater pump, and a precise filter assembly connected in that order via pipelines. The seawater reverse osmosis filtering device comprises: the first control valve, a pressure pump, a reverse osmosis membrane assembly, a pressure regulating valve, the second control valve, and a purge water tank connected in that order via pipelines. One end of the seawater inlet valve of the seawater introducing and filtering device is connected to a seawater inlet, and the other end of the seawater inlet valve is connected to the seawater pump. An outlet end of the seawater pump is connected to the precise filter assembly, and an outlet of the precise filter assembly is connected to the first control valve. The first control valve of the seawater introducing and filtering device is connected to the pressure pump, and the pressure pump is connected to a water inlet of the reverse osmosis membrane assembly. A freshwater outlet of the reverse osmosis membrane assembly is divided into two paths, one path is connected to a freshwater outlet valve, and the other path is connected to a purge water tank via a liquid level valve. The reverse osmosis membrane assembly further comprises a concentrated seawater outlet, and the concentrated seawater outlet is connected to the pressure regulating valve and second control valve. The purge water tank is connected to a water inlet of the pressure pump via the first control valve.
In a class of this embodiment, a first inlet of the first control valve communicates with an end of the seawater introducing and filtering device. A second inlet of the first control valve communicates with an output pipe of a purge water tank of the seawater reverse osmosis filtering device. An outlet of the first control valve communicates with an inlet of a pressure pump of the seawater reverse osmosis filtering device.
In a class of this embodiment, the first control valve comprises a first three-way solenoid valve. A first inlet of the first three-way solenoid valve communicates with the end of the seawater introducing and filtering device. A second inlet of the first three-way solenoid valve communicates with the output pipe of the purge water tank of the seawater reverse osmosis filtering device. An outlet of the first three-way solenoid valve communicates with the inlet of the pressure pump of the seawater reverse osmosis filtering device.
In a class of this embodiment, the seawater reverse osmosis filtering device further comprises a purge valve connected to the purge water tank. The first control valve is a first two-way integrated control valve comprising a water inlet valve and the purge valve. A first fluid channel is arranged in the water inlet valve, and a second fluid channel is arranged in the purge valve. The first fluid channel and the second fluid channel cooperate with a valve core rod of the first two-way integrated control valve by synchronous rotation. A contact is arranged on the valve core rod corresponding to a first contact switch and a second contact switch of different positions; the first contact switch and a switch of the pressure pump are in electric connection and form a first electrifying switch circuit. The second contact switch, a time controller, and the switch of the pressure pump are in electric connection and form a second electrifying switch circuit. When rotating the valve core rod to a first set position, the first fluid channel is in an open state while the second fluid channel is in a closed state, and the contact triggers the first contact switch to connect the first electrifying switch circuit; and when rotating the valve core rod to a second set position, the second fluid channel is in the open state while the first fluid channel is in the closed state, and the contact triggers the second contact switch to connect the second electrifying switch circuit.
In a class of this embodiment, an inlet of the second control valve communicates with a pressure regulating valve of the seawater reverse osmosis filtering device. A first outlet of the second control valve communicates with a concentrated water outlet of the seawater reverse osmosis filtering device. A second outlet of the second control valve communicates with an inlet of a purge water tank of the seawater reverse osmosis filtering device.
In a class of this embodiment, the second control valve comprises a second three-way solenoid valve; an inlet of the second three-way solenoid valve communicates with the pressure regulating valve of the seawater reverse osmosis filtering device. A first outlet of the second three-way solenoid valve communicates with the concentrated water outlet of the seawater reverse osmosis filtering device. A second outlet of the second three-way solenoid valve communicates with the inlet of the purge water tank of the seawater reverse osmosis filtering device.
In a class of this embodiment, the second control valve is a second two-way integrated control valve comprising a reflux valve and a water outlet valve. The reflux valve is arranged behind the pressure regulating valve in a water flow direction and communicates with the purge water tank. A third fluid channel is arranged in the water outlet valve, and a fourth fluid channel is arranged in the reflux valve. The third fluid channel and the fourth fluid channel cooperate with a valve core rod of the second two-way integrated control valve by synchronous rotation. A contact is arranged on the valve core rod corresponding to a third contact switch and a fourth contact switch of different positions; the third contact switch, a time controller, and a switch of the pressure pump are in electric connection and form a third electrifying switch circuit. The fourth contact switch, the time controller, and the switch of the pressure pump are in electric connection and form a fourth electrifying switch circuit. When rotating the valve core rod to a third set position, the third fluid channel is in an open state while the fourth fluid channel is in a closed state, and the contact triggers the third contact switch to connect the third electrifying switch circuit; and when rotating the valve core rod to a fourth set position, the fourth fluid channel is in the open state while the third fluid channel is in the closed state, and the contact triggers the fourth contact switch to connect the fourth electrifying switch circuit.
In a class of this embodiment, the first control valve and the second control valve are selected from one of the following combinations: 1) both the first control valve and the second control valve are electrically controlled three-way solenoid valves; 2) the first control valve is a manual two-position three-way valve, and the second valve is the electrically controlled three-way solenoid valve; 3) the first control valve is the electrically controlled three-way solenoid valve, and the second control valve is the manual two-position three-way valve; 4) both the first control valve and the second control valve are manual two-position three-way valves; 5) both the first control valve and the second control valve are pneumatically controlled two-position three-way valves; 6) the first control valve is the manual two-position three-way valve, and the second control valve is the pneumatically controlled two-position three-way valve; 7) the first control valve is the pneumatically controlled two-position three-way valve, and the second control valve is the manual two-position three-way valve; 8) the first control valve is the electrically controlled three-way solenoid valve, and the second control valve is the pneumatically controlled two-position three-way valve; 9) the first control valve is the pneumatically controlled two-position three-way valve, and the second control valve is the electrically controlled two-position three-way solenoid valve; 10) the first control valve is a manual type first two-way integrated control valve comprising the water inlet valve and the purge valve, and the second control valve is the electrically controlled three-way solenoid valve; 11) the first control valve is the electrically controlled three-way solenoid valve, and the second control valve is a manual type second two-way integrated control valve comprising the water outlet valve and the reflux valve communicating with the purge water tank; 12) the first control valve is the manual type first two-way integrated control valve comprising the water inlet valve and the purge valve, and the second control valve is the manual two-position three-way valve; 13) the first control valve is the manual two-position three-way valve, and the second control valve is the manual type second two-way integrated control valve comprising the water outlet valve and the reflux valve communicating with the purge water tank; 14) the first control valve is the manual type first two-way integrated control valve comprising the water inlet valve and the purge valve, and the second control valve is the pneumatically controlled two-position three-way valve; and 15) the first control valve is the pneumatically controlled two-position three-way valve, and the second control valve is the manual type second two-way integrated control valve comprising the water outlet valve and the reflux valve communicating with the purge water tank.
In a class of this embodiment, the control circuit comprises related circuits connected in parallel for controlling the first control valve, the second control valve, the pressure pump, and an off-delay controller or a programmable logic controller (PLC).
In a class of this embodiment, the control circuit is a switch circuit comprising the first electrifying switch circuit, the second electrifying switch circuit, the third electrifying switch circuit, and the fourth electrifying switch circuit connected in parallel.
In a class of this embodiment, the time controller is a time relay or a microcontroller unit (MCU).
In accordance with another embodiment of the invention, there is provided a seawater desalination device, comprising: a seawater introducing and filtering device, a control circuit, and a seawater reverse osmosis filtering device. The seawater introducing and filtering device comprises: a seawater inlet valve, a seawater pump, and a precise filter assembly connected in that order via pipelines. The seawater reverse osmosis filtering device comprises: a first control valve, a pressure pump, a reverse osmosis membrane assembly, a pressure regulating valve, a second control valve, and a purge water tank connected in that order via pipelines. The first control valve arranged between the seawater introducing and filtering device and the seawater reverse osmosis filtering device is a first three-way solenoid valve. A first inlet of the first three-way solenoid valve communicates with an end of the seawater introducing and filtering device. A second inlet of the first three-way solenoid valve communicates with an output pipe of the purge water tank of the seawater reverse osmosis filtering device; an outlet of the first three-way solenoid valve communicates with an inlet of a pressure pump of the seawater reverse osmosis filtering device. The control circuit is adapted to control operation of the seawater reverse osmosis filtering device.
In a class of this embodiment, the second control valve arranged on a pipe behind the pressure regulating valve of the seawater reverse osmosis filtering device in a water flow direction is a second three-way solenoid valve. An inlet of the second three-way solenoid valve communicates with the pressure regulating valve of the seawater reverse osmosis filtering device. A first outlet of the second three-way solenoid valve communicates with the concentrated water outlet of the seawater reverse osmosis filtering device. A second outlet of the second three-way solenoid valve communicates with an inlet of the purge water tank of the seawater reverse osmosis filtering device.
In accordance with still another embodiment of the invention, there is provided a seawater desalination device, comprising: a seawater introducing and filtering device, a seawater reverse osmosis filtering device, and a control circuit. The seawater introducing and filtering device comprises: a seawater inlet valve, a seawater pump, and a precise filter assembly connected in that order via pipelines. The seawater reverse osmosis filtering device comprises: a first control valve, a pressure pump, a reverse osmosis membrane assembly, a pressure regulating valve, a second control valve, and a purge water tank connected in that order via pipelines. The second control valve arranged on a pipe behind the pressure regulating valve of the seawater reverse osmosis filtering device in a water flow direction is a second three-way solenoid valve. An inlet of the second three-way solenoid valve communicates with the pressure regulating valve of the seawater reverse osmosis filtering device. A first outlet of the second three-way solenoid valve communicates with the concentrated water outlet of the seawater reverse osmosis filtering device. A second outlet of the second three-way solenoid valve communicates with an inlet of the purge water tank of the seawater reverse osmosis filtering device. The control circuit is adapted to control operation of the seawater reverse osmosis filtering device.
In a class of this embodiment, the seawater introducing and filtering device is connected to the first control valve of the seawater reverse osmosis filtering device. The first control valve is a first three-way solenoid valve. A first inlet of the first three-way solenoid valve communicates with an end of the seawater introducing and filtering device. A second inlet of the first three-way solenoid valve communicates with an output pipe of the purge water tank of the seawater reverse osmosis filtering device. An outlet of the first three-way solenoid valve communicates with an inlet of a pressure pump of the seawater reverse osmosis filtering device.
In accordance with still another embodiment of the invention, there is provided a method for desalinating seawater using the seawater desalination device. The first control valve of the seawater desalination device is a first two-way integrated control valve comprising a water inlet valve and a purge valve. A first fluid channel is arranged in the water inlet valve, and a second fluid channel is arranged in the purge valve. The first fluid channel and the second fluid channel cooperate with a valve core rod of the first two-way integrated control valve by synchronous rotation. A contact is arranged on the valve core rod corresponding to a first contact switch and a second contact switch of different positions. The first contact switch and a switch of a pressure pump are in electric connection and form a first electrifying switch circuit. The second contact switch, a time controller, and the switch of the pressure pump are in electric connection and form a second electrifying switch circuit. The method comprises the following steps:
In accordance with still another embodiment of the invention, there is provided a method for cleaning the seawater desalination device. The first control valve of the seawater desalination device is a first two-way integrated control valve comprising a water inlet valve and a purge valve. A first fluid channel is arranged in the water inlet valve, and a second fluid channel is arranged in the purge valve; the first fluid channel and the second fluid channel cooperate with a valve core rod of the first two-way integrated control valve by synchronous rotation. The second control valve is a second two-way integrated control valve comprising a reflux valve and a water outlet valve; the reflux valve is arranged behind the pressure regulating valve in a water flow direction and communicates with a purge water tank. A third fluid channel is arranged in the water outlet valve, and a fourth fluid channel is arranged in the reflux valve. The third fluid channel and the fourth fluid channel cooperate with a valve core rod of the second two-way integrated control valve by synchronous rotation. The method comprises:
In accordance with still another embodiment of the invention, there is provided a method for desalinating seawater using the seawater desalination device. The first control valve is a first three-way solenoid valve, and the second control valve is a second three-way solenoid valve. The method comprises the following steps:
In accordance with still another embodiment of the invention, there is provided a method for cleaning the seawater desalination device. The first control valve is a first three-way solenoid valve, and the second control valve is a second three-way solenoid valve. The method comprises:
Advantages of the seawater desalination device, the method for desalinating seawater using the same, and the method for cleaning the seawater desalination device according to embodiments of the invention are summarized as follows:
The invention is described hereinbelow with reference to the accompanying drawings, in which:
For further illustrating the invention, experiments detailing a seawater desalination device, a method for desalinating seawater using the same, and a method for cleaning the seawater desalination device are described below. It should be noted that the following examples are intended to describe and not to limit the invention.
As shown in
The seawater is filtrated in the seawater introducing and filtering device 10; following the filtration, the seawater passes through the water inlet valve 2101 and is communicated with the pressure pump 22. Then the seawater is communicated with a water inlet of the reverse osmosis membrane assembly 23 to produce fresh water. The freshwater is distributed to two paths from a freshwater outlet of the reverse osmosis membrane assembly 23. One path is communicated with the freshwater outlet valve 25′ and is discharged from the freshwater outlet valve; and the other path is communicated with the liquid level valve 26 and is allowed to enter the purge water tank 27. The concentrated seawater produced during the filtration passes through the pressure regulating valve 24 and is discharged from the water outlet valve 2501. The purge water tank 27 is connected to a water inlet of the pressure pump 22 via the purge valve 28.
The water inlet valve 2101 and the purge valve 28 are integrated to from a first two-way integrated control valve which is ganged. The water inlet valve 2101 comprises a first fluid channel 21a, and the purge valve 28 comprises a second fluid channel 28a. The first fluid channel 21a and the second fluid channel 28a are coordinated with and simultaneously rotated with a valve core rod 210. The valve core rod 210 comprises a contact 210a, and the contact 210a is corresponding to a first contact switch 211 and a second contact switch 212 which are disposed at different positions, respectively. The first contact switch 211 is electrically connected to a switch of the pressure pump 22 to form a first electrifying switch circuit, and the second contact switch 212 is electrically connected to a time controller 213 and a switch of the pressure pump 22 to form a second electrifying switch circuit.
When the valve core rod 210 is rotated to a first set position, the first fluid channel 21a is in an on state, and the second fluid channel 28a is in an off state. The contact triggers the first contact switch 211, and the first electrifying switch circuit is turned on.
When the valve core rod 210 is rotated to a second set position, the second fluid channel 28a is in an on state, and the first fluid channel 21a is in an off state. The contact triggers the second contact switch 212, and the second electrifying switch circuit is turned on.
The contact switch is described above is only one embodiment of the invention. Optionally, the contact switch is substituted by other switches of similar functions, such as a proximity switch or a Hall switch.
In addition to the pressure regulating valve 24, a reflux valve 29 is also provided in the invention. The reflux valve 29 is communicated with the purge water tank 27. The reflux valve 29 and the water outlet valve 2501 are integrated to form a second two-way integrated control valve which is ganged. The second two-way integrated control valve follows a basic structure and principle of the first two-way integrated control valve. As shown in
When the valve core rod is rotated to a third set position, the third fluid channel is in an on state, and the fourth fluid channel is in an off state. The contact triggers the third contact switch, and the third electrifying switch circuit is turned on.
When the valve core rod is rotated to a fourth set position, the fourth fluid channel is in an on state, and the third fluid channel is in an off state. The contact triggers the fourth contact switch, and the fourth electrifying switch circuit is turned on.
The seawater introducing and filtering device comprises a seawater inlet valve 11, a seawater pump 12, and a precision precise filter assembly 13. An end of the seawater inlet valve 11 is connected to a seawater inlet, and another end of the seawater inlet valve 11 is connected to the seawater pump 12. An outlet end of the seawater pump 12 is connected to the precision precise filter assembly 13. An outlet of the precision precise filter assembly 13 is connected to the water inlet valve 2101.
The time controller 213 is a time relay or a MCU.
The first electrifying switch circuit, the second electrifying switch circuit, the third electrifying switch circuit, and the fourth electrifying switch circuit are parallel switch circuits.
A seawater desalination method of the seawater desalination device in operation and during downtime in the invention, the method comprising:
1) when the seawater needs to be desalinated, the valve core rod 210 of the first two-way integrated control valve is rotated to a first set position, thus the first fluid channel 21a is in an on state, and simultaneously the second fluid channel 28a is in an off state; the contact triggers the first contact switch 211, and the first electrifying switch circuit is turned on;
2) the pressure pump 22 is allowed to constantly pump the seawater to the reverse osmosis membrane assembly 23 to produce fresh water; the freshwater is distributed to two paths from a freshwater outlet of the reverse osmosis membrane assembly 23; one path is communicated with the freshwater outlet valve 25′ and is discharged from the freshwater outlet valve; and the other path is communicated with the liquid level valve 26 and is allowed to enter the purge water tank 27; the concentrated seawater produced during the filtration passes through the pressure regulating valve 24 and is discharged from the water outlet valve 2501;
3) when the seawater desalination device is turned off as the desalination is finished, the valve core rod 210 of the first two-way integrated control valve is rotated to a second set position, thus the second fluid channel 28a is in an on state, and the first fluid channel 21a is in an off state; the contact triggers the second contact switch 212, and the second electrifying switch circuit is turned on;
4) the pressure pump 22 is controlled by the time controller 213 of the second electrifying switch circuit, and the time controller sets time to turn off the pressure pump; during an operation of the pressure pump 22, the freshwater in the purge water tank 27 is allowed to enter the pressure pump 22 via the purge valve 28, and then the freshwater is pumped to the reverse osmosis membrane assembly 23 from the pressure pump 22 to replace the seawater in the reverse osmosis membrane assembly 23; and the replaced seawater passes through the pressure regulating valve 24 and is discharged from the water outlet valve 2501;
A method for cleaning the reverse osmosis membrane assembly of the seawater desalination device after long-term service using detergent, the method comprising:
1) when the reverse osmosis membrane assembly needs to be cleaned by detergent, the detergent is added to the purge water tank 27; the valve core rod 210 of the first two-way integrated control valve is rotated to a second set position, thus the second fluid channel 28a is in an on state, and the first fluid channel 21a is in an off state; meanwhile, the valve core rod of the second two-way integrated control valve is rotated to a fourth set position, the fourth fluid channel is in an on state, and the third fluid channel is in an off state; the contact triggers the fourth contact switch, and the fourth electrifying switch circuit is turned on;
2) the pressure pump is controlled by the time controller of the fourth electrifying switch circuit, and the time controller sets time to turn off the pressure pump; during an operation of the pressure pump, the detergent in the purge water tank 27 is allowed to enter the pressure pump 22 via the purge valve 28, and then the detergent is pumped to the reverse osmosis membrane assembly 23 from the pressure pump 22 to clean the reverse osmosis membrane assembly 23; then the detergent passes through the fourth fluid channel of the reflux valve 29 and is allowed to return back to the purge water tank 27; the above process is repeated to clean the reverse osmosis membrane assembly;
3) when the set time of the time controller of the fourth electrifying switch circuit is over, the valve core rod of the second two-way integrated control valve is rotated to a third set position, thus the third fluid channel is in an on state, and the fourth fluid channel is in an off state; the contact triggers the third contact switch, and the third electrifying switch circuit is turned on;
4) the pressure pump 22 is then controlled by the time controller of the third electrifying switch circuit, and the time controller sets time to turn off the pressure pump; during an operation of the pressure pump 22, the detergent in the purge water tank 27 is allowed to enter the pressure pump 22 via the purge valve 28, and then the detergent is pumped to the reverse osmosis membrane assembly 23 from the pressure pump 22; the detergent passes through the reverse osmosis membrane assembly 23 and the pressure regulating valve 24, and is discharged from the water outlet valve.
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1) when the seawater needs to be desalinated, the first three-way solenoid valve 2102 is turned on, thus a first inlet channel is in an on state, and simultaneously the second inlet channel is in an off state; the seawater is allowed to flow in the pressure pump 22 via the first inlet channel; at the same time, the second three-way solenoid valve 2502 is turned off, thus a first outlet channel of the second three-way solenoid valve 2502 is in an on state, and a second outlet channel is in an off state;
2) the pressure pump 22 is allowed to constantly pump the seawater to the reverse osmosis membrane assembly 23 to produce fresh water; the freshwater is distributed to two paths from a freshwater outlet of the reverse osmosis membrane assembly 23; one path is communicated with the freshwater outlet valve 25′ and is discharged from the freshwater outlet valve; and the other path is communicated with the liquid level valve 26 and is allowed to enter the purge water tank 27; the concentrated seawater produced during the filtration passes through the pressure regulating valve 24 and the first outlet channel of the second three-way solenoid valve 2502, and is discharged from the concentrated seawater outlet;
3) when the seawater desalination device is turned off as the desalination is finished, the first three-way solenoid valve 2102 is turned off, meanwhile the time controller 213 is actuated, thus the second inlet channel is in an on state, and the first inlet channel is in an off state; the freshwater in the purge water tank 27 is allowed to flow to the pressure pump 22 via the second inlet channel; the pressure pump 22 is controlled by the time controller 213, and the time controller sets time to turn off the pressure pump;
4) the freshwater in the purge water tank 27 is pumped to the reverse osmosis membrane assembly 23 via the pressure pump 22 to replace the seawater in the reverse osmosis membrane assembly 23; and the replaced seawater passes through the pressure regulating valve 24 and the first outlet channel of the second three-way solenoid valve 2502, and is discharged from the concentrated seawater outlet.
As shown in
1) when the reverse osmosis membrane assembly 23 needs to be cleaned by detergent, the detergent is added to the purge water tank 27; the first three-way solenoid valve 2102 is turned off, thus the second inlet channel is in an on state, the detergent in the purge water tank 27 is allowed to flow in the pressure pump 22; the first inlet channel is in an off state, thus preventing the seawater from entering in; meanwhile, the second three-way solenoid valve 2502 is turned on, and the pressure pump 22 and the time controller 213 are actuated, thus the second outlet channel of the second three-way solenoid valve 2502 is in an on state, and the first outlet channel is in an off state, preventing the detergent from being discharged;
2) the detergent in the purge water tank 27 is pumped to the reverse osmosis membrane assembly 23 via the pressure pump 22; then the detergent passes through the pressure regulating valve 24 and the second outlet channel of the second three-way solenoid valve 2502, and is allowed to return back to the purge water tank 27; the detergent then is allowed to enter the pressure pump 22 via the second inlet channel of the first three-way solenoid valve 2102 to repeat the cleaning of the reverse osmosis membrane assembly 23;
3) the time controller 213 operates to control the second three-way solenoid valve 2502, and the time controller sets time to turn off the second three-way solenoid valve; the second outlet channel of the second three-way solenoid valve 2502 is in an off state, thus the cyclic cleaning is stopped; the detergent passes through the first outlet channel of the second three-way solenoid valve 2502 and is discharged from the concentrated seawater outlet; again the time controller 213 operates to control the pressure pump, and sets time to turn off the pressure pump.
In the example, the first three-way solenoid valve 2102 and the second three-way solenoid valve 2502 are electrically controlled; except the example, the following alternative combinations is optional according to needs for those skilled in the art:
1) the first control valve is a manual two-position three-way valve, and the second control valve is an electrically controlled three-way solenoid valve;
2) the first control valve is an electrically controlled three-way solenoid valve, and the second control valve is a manual two-position three-way valve;
3) the first control valve and the second control valve are manual two-position three-way valve;
4) the first control valve is a manual two-position three-way valve, and the second control valve is an electrically controlled two-position three-way gas control valve;
5) the first control valve is an electrically controlled two-position three-way gas control valve, and the second control valve is a manual two-position three-way valve;
6) the first control valve is an electrically controlled two-position three-way gas control valve, and the second control valve is an electrically controlled two-position three-way solenoid valve;
7) the first control valve is a manual integrated control valve which is ganged and integrates a water inlet valve and a purge valve, and the second control valve is a manual two-position three-way valve;
8) the first control valve is a manual two-position three-way valve, and the second control valve is a manual integrated control valve which is ganged and integrates a water inlet valve and a purge valve;
9) the first control valve is a manual integrated control valve which is ganged and integrates a water inlet valve and a purge valve, and the second control valve is an electrically controlled two-position three-way gas control valve; and
10) the first control valve is an electrically controlled two-position three-way gas control valve, and the second control valve is a manual integrated control valve which is ganged and integrates a water inlet valve and a purge valve.
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When the valve core rod 210 is rotated to a fourth set position, the fourth fluid channel is in an on state, and the third fluid channel is in an off state. The contact 210a triggers the fourth contact switch, and the fourth electrifying switch circuit is turned on. The PLC, the third electrifying switch circuit, and the fourth electrifying switch circuit are parallel switch circuits.
In the example, the combination of the first control valve and the second control valve is: the first control is an electrically controlled three-way solenoid valve 21, and the second control valve is the second two-way integrated control valve which is ganged and integrates the water outlet valve 2501 which discharges water and the reflux valve 29 which is communicated with the purge water tank 27.
As shown in
1) when the seawater needs to be desalinated, the first three-way solenoid valve 2102 is turned on, thus a first inlet channel is in an on state, and simultaneously the second inlet channel is in an off state; the seawater is allowed to flow in the pressure pump 22 via the first inlet channel;
2) the pressure pump 22 is allowed to constantly pump the seawater to the reverse osmosis membrane assembly 23 to produce fresh water; the freshwater is distributed to two paths from a freshwater outlet of the reverse osmosis membrane assembly 23; one path is communicated with the freshwater outlet valve 25′ and is discharged from the freshwater outlet valve; and the other path is communicated with the liquid level valve 26 and is allowed to enter the purge water tank 27; the concentrated seawater produced during the filtration passes through the pressure regulating valve 24 and the water outlet valve 2501, and is discharged from the concentrated seawater outlet;
3) when the seawater desalination device is turned off as the desalination is finished, the first three-way solenoid valve 2102 is turned off, meanwhile the PLC is actuated, thus the second inlet channel is in an on state, and the first inlet channel is in an off state; the freshwater in the purge water tank 27 is allowed to flow to the pressure pump 22 via the second inlet channel; the pressure pump 22 is controlled by the PLC, and the PLC sets time to turn off the pressure pump;
4) the freshwater in the purge water tank 27 is pumped to the reverse osmosis membrane assembly 23 via the pressure pump 22 to replace the seawater in the reverse osmosis membrane assembly 23; and the replaced seawater passes through the pressure regulating valve 24 and the water outlet valve 2501, and is discharged from the concentrated seawater outlet.
As shown in
1) when the reverse osmosis membrane assembly 23 needs to be cleaned by detergent, the detergent is added to the purge water tank 27; the first three-way solenoid valve 2102 is turned off, thus the second inlet channel is in an on state, the detergent in the purge water tank 27 is allowed to flow in the pressure pump 22; the first inlet channel is in an off state, thus preventing the seawater from entering in; meanwhile, the valve core rod 210 is rotated to a fourth set position, the fourth fluid channel is in an on state, and the third fluid channel is in an off state; the contact 210a triggers the fourth contact switch, and the fourth electrifying switch circuit is turned on;
2) the pressure pump 22 is controlled by the PLC of the fourth electrifying switch circuit, and the PLC sets time to turn off the pressure pump; during an operation of the pressure pump 22, the detergent in the purge water tank 27 is allowed to enter the pressure pump 22 through the second inlet channel of the first three-way solenoid valve 2102, and then the detergent is pumped to the reverse osmosis membrane assembly 23 from the pressure pump 22 to clean the reverse osmosis membrane assembly 23; then the detergent passes through the reflux valve 29 and is allowed to return back to the purge water tank 27; the above process is repeated to clean the reverse osmosis membrane assembly 23;
3) when the set time of the PLC of the fourth electrifying switch circuit is over, the valve core rod 210 is rotated to a third set position, thus the third fluid channel is in an on state, and the fourth fluid channel is in an off state; the contact 210a triggers the third contact switch, and the third electrifying switch circuit is turned on;
4) the pressure pump 22 is then controlled by the PLC of the third electrifying switch circuit, and the PLC sets time to turn off the pressure pump; during an operation of the pressure pump 22, the detergent in the purge water tank 27 is allowed to enter the pressure pump 22 via the second inlet channel of the first three-way solenoid valve 2102, and then the detergent is pumped to the reverse osmosis membrane assembly 23 from the pressure pump 22; the detergent passes through the reverse osmosis membrane assembly 23 and the pressure regulating valve 24, and is discharged from the water outlet valve 2501.
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As shown in
As shown in
When the valve core rod 210 is rotated to a first set position, the first fluid channel is in an on state, and the second fluid channel is in an off state. The contact 210a triggers the first contact switch 211, and the first electrifying switch circuit is turned on. When the valve core rod 210 is rotated to a second set position, the second fluid channel is in an on state, and the first fluid channel is in an off state. The contact 210a triggers the second contact switch 212, and the second electrifying switch circuit is turned on.
As shown in
In the example, the first control circuit comprises a first two-way integrated control valve, a second three-way solenoid valve 2502, a pressure pump 22, and an off-delay controller or a PLC (not shown). The first two-way integrated control valve, a second three-way solenoid valve 2502, a pressure pump 22, and an off-delay controller or a PLC (not shown) are parallel.
In the example, the second control circuit is a parallel switch circuit comprising a first electrifying switch circuit and a second electrifying switch circuit.
In the example, the first control valve is a manual integrated control valve which is ganged and integrates a water inlet valve 2101 and a purge valve 28, and the second control valve is an electrically controlled two-position three-way solenoid valve 25.
As shown in
1) when the seawater needs to be desalinated, the valve core rod 210 of the first two-way integrated control valve is rotated to a first set position, thus the first fluid channel is in an on state, and simultaneously the second fluid channel is in an off state; the contact 210a triggers the first contact switch 211, and the first electrifying switch circuit is turned on;
2) the pressure pump 22 is allowed to constantly pump the seawater to the reverse osmosis membrane assembly 23 to produce fresh water; the freshwater is distributed to two paths from a freshwater outlet of the reverse osmosis membrane assembly 23; one path is communicated with the freshwater outlet valve 25′ and is discharged from the freshwater outlet valve; and the other path is communicated with the liquid level valve 26 and is allowed to enter the purge water tank 27; the concentrated seawater produced during the filtration passes through the first outlet channel of the second three-way solenoid valve 2502 and is discharged from the concentrated seawater outlet;
3) when the seawater desalination device is turned off as the desalination is finished, the valve core rod 210 of the first two-way integrated control valve is rotated to a second set position, thus the second fluid channel is in an on state, and the first fluid channel is in an off state; the contact 210a triggers the second contact switch 212, and the second electrifying switch circuit is turned on;
4) the pressure pump 22 is controlled by the time controller 213 of the second electrifying switch circuit or the PLC, and the time controller or the PLC sets time to turn off the pressure pump; during an operation of the pressure pump 22, the freshwater in the purge water tank 27 is allowed to enter the pressure pump 22 via the purge valve 28, and then the freshwater is pumped to the reverse osmosis membrane assembly 23 from the pressure pump 22 to replace the seawater in the reverse osmosis membrane assembly 23; and the replaced seawater passes through the pressure regulating valve 24 and the first outlet channel of the second three-way solenoid valve 2502, and is discharged from the concentrated seawater outlet;
As shown in
1) when the reverse osmosis membrane assembly 23 needs to be cleaned by detergent, the detergent is added to the purge water tank 27; the valve core rod 210 of the first two-way integrated control valve is rotated to a second set position, thus the second fluid channel is in an on state, and the first fluid channel is in an off state; meanwhile, the second three-way solenoid valve 2502 is turned on, and the pressure pump 22 and the time controller 213 or PLC are actuated, thus the second outlet channel of the second three-way solenoid valve 2502 is in an on state, and the first outlet channel is in an off state, preventing the detergent from being discharged;
2) the detergent in the purge water tank 27 is pumped to the reverse osmosis membrane assembly 23 via the pressure pump 22; then the detergent passes through the pressure regulating valve 24 and the second outlet channel of the second three-way solenoid valve 2502, and is allowed to return back to the purge water tank 27; the detergent then is allowed to enter the pressure pump 22 via the purge valve 28 to repeat the cleaning of the reverse osmosis membrane assembly 23;
3) the time controller or the PLC operates to control the second three-way solenoid valve 2502, and the time controller or the PLC sets time to turn off the second three-way solenoid valve; the second outlet channel of the second three-way solenoid valve 2502 is in an off state, thus the cyclic cleaning is stopped; the detergent passes through the first outlet channel of the second three-way solenoid valve 2502 and is discharged from the concentrated seawater outlet; again the time controller or the PLC operates to control the pressure pump 22, and sets time to turn off the pressure pump.
While particular embodiments of the invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects, and therefore, the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of the invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201410126999.4 | Mar 2014 | CN | national |
| 201520165169.2 | Mar 2015 | CN | national |
This application is a continuation-in-part of International Patent Application No. PCT/CN2015/075063 with an international filing date of Mar. 25, 2015, designating the United States, now pending, and further claims priority benefits to Chinese Patent Application No. 201410126999.4 filed Mar. 31, 2014, and to Chinese Patent Application No. 201520165169.2 filed Mar. 23, 2015. The contents of all of the aforementioned applications, including any intervening amendments thereto, are incorporated herein by reference. Inquiries from the public to applicants or assignees concerning this document or the related applications should be directed to: Matthias Scholl P.C., Attn.: Dr. Matthias Scholl Esq., 245 First Street, 18th Floor, Cambridge, Mass. 02142.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2015/075063 | Mar 2015 | US |
| Child | 15281047 | US |
