Patent Application
20130071187
Not Applicable
Not Applicable
In many parts of the world water reserves are being depleted and the threat to societies survival increasing as those reserves are not being replenished. Likewise the serious threat to peoples living in coastal inhabitants from sea level rise is causing substantial disruption to societies and their survival. Iceberg Reclamation Industry invention describes the method and apparatus of producing fresh water from icebergs using stationary offshore platform structures intended to be installed on a sea bed in arctic waters or where icebergs occur. The present invention pertains to the hydraulic and earth engineering field and endeavors to create fresh water from melted icebergs and provide a means for the transport of said produced water. The claimed invention modifies or adapts offshore platform structures for arctic waters such as but not limited to offshore platform structures for artic waters disclosed in U.S. Pat. No.: 4,484,841 and U.S. Pat. No.: 4,102,144 to become iceberg process plants.
Substantial reserves of fresh water exist in the form of icebergs in artic regions therefore, the present invention is a method of processing icebergs using apparatuses described as Iceberg Reclamation Industry and will result in the economical production of fresh water to be transported to augment water reserves around the world as drinking water and or irrigation. The disclosed process is drawn to solving problems of utilizing icebergs as viable water sources while creating an effect disclosed here as a countermeasure to sea level rise.
Prior art has dealt with towing massive icebergs away from arctic waters to arid climates such as U.S. Pat. No.: 6,688,105, or actively breaking ice by shattering it with movable shields to protect offshore oil and gas platform structures. Towing icebergs has proven to be costly and inefficient and the size of an iceberg considered economically feasible to tow is approximately one billion cubic meters or 1 kilometer (km) wide, 5 km long, and 200 m deep. In the past, there have been disclosed a number of proposed solutions to the problem of reducing ice forces on offshore structures. For example, U.S. Pat. No.: 4,102,144 uses a movable shield to shatter and maneuver floating ice away from a drilling station. The Iceberg Reclamation Industry disclosed here will use similar technology to break icebergs into pieces. The present method will further utilize technology to harvest, melt, store, and disperse produced water via pipeline or ship. By utilizing floating ice masses moving towards stationary Iceberg Reclamation working marine structure/s the presently preferred form of the invention is capable of producing cheaper readily available fresh water by processing icebergs in their natural environment before transporting the produced water. The offshore platform structures are long lasting, clean and safe to operate and can be decommissioned by reverse installation. With the addition of the claimed invention the problems of transferring fresh water from where it is most abundant to where it is most needed can be solved. The intended use of this invention is fresh water production in arctic waters, but the disclosed invention is not limited to pertaining to floating ice on water surface and can be operated and utilized to collect, remove and process any desired type of flotsam and jetsam from a body of water.
It is understood that the present invention for water production is not limited to hydraulic and earth engineering as it also discloses means for solving problems of removing floating objects from a body of water. One method of the invented apparatus being described is to utilize icebergs and to develop a new process to provide access to the produced fresh water from icebergs.
In brief, the Iceberg Reclamation Industry is the process of capturing icebergs using a working stationary offshore processing structure/s in the attempt to produce fresh water and reduce the amount of ice melting into the ocean. Iceberg Reclamation Industry method includes, but is not limited to the adaption of stationary offshore marine platforms and involves the operation of a moveable radially and basin shaped shield (including the ice gate), a ramp-like conveyor system, a heated hopper and auger apparatus, and water storage facility all of which is constructed part of and surrounding a pylon fixed to the sea floor that is topped with a working platform. The invention is especially useful in allowing the water industry to harness the resource of icebergs as a main source of drinking water and reducing the amount of ice melt into oceans minimizing the elevation of sea levels. One solution proposed in U.S. Pat. No.: 4,295,333 claims that the use of melt water from icebergs are an inexpensive source of irrigation water for arid regions. However the scope is limited by the lack of an inclusive method to achieve widespread benefit from the produced water. The annual yield of fresh water from icebergs is estimated at 12,000 cubic kilometers, the total world iceberg accumulation being six times this amount. Annual yield of fresh water from Antarctic icebergs alone would provide sufficient water to irrigate about 90 million hectares or 40% of currently irrigated land.
The Iceberg Reclamation Industry utilizes ice on site, versus other methods that attempt to tow icebergs thousands of miles. The invention is a process of breaking up ice, capturing, sometimes called corralling ice into a basin shaped shield forming an annular void in between the minimum diameter portion and the maximum diameter portion of the shield and then transferring ice pieces onto a ramp-like conveyor elevator apparatus that carries the ice pieces out of a body of water and dumps ice pieces into an attached hopper apparatus constructed to heat and crush the ice before the water flows into underwater work chamber tanks from where the water can be piped or pumped into transport infrastructure/s. Once the ice is melted completely the water is piped to onshore sites or loaded onto water tankers or floating storage facilities like the method described in U.S. Pat. No.: 5,885,028.
The harvesting of ice begins as the icebergs naturally float downstream toward the Iceberg Reclamation plant. Prior art methods for moving icebergs through the water into a predetermined float path using apparatus described in U.S. Pat. No.: 4,320,989, U.S. Pat. No.: 4,030,305, and U.S. Pat. No.: 3,585,802 can be employed to maneuver ice towards the Iceberg Reclamation marine structure/s to achieve the directive of harvesting them. Boats, harpoon mechanisms, and winch apparatus can also be used safely to bring the icebergs towards the structure/s. In this presently preferred form of the invention, the moveable radial and basin shaped shield is initially in a submersed position so the floating advancing ice will not contact the outside of the upper portion of the maximum diameter portion of the shields' exterior surface. As the ice floats into position above the shields' outer lip i.e., the shields working edge the ice can become captured as it is broken by the shield upstroke. During the upstroke of the shield, an upper portion of the shield surface moves progressively into lifting contact with the adjacent ice and exerts an upward force to break the ice into pieces and thereof as the shield is raised entirely captures the desired ice in the annular void of the basin shaped shield. And ice is corralled within the shield and the pylon of the platform. The corral is formed when the shield is lifted entirely and the desired ice is surrounded while floating in the water between the outside maximum diameter portion of the shield and the pylon i.e., the minimum diameter portion of the shield. The purpose of the corral is to hold the floating ice within the wall of the shield so the ice can be processed or broken into pieces. U.S. Pat. No.: 4,102,144 discloses a similar shield (although of an inverted and conical design relative to the preferred present inventions' basin with its annular void circular shaped shield. The differing shield shapes of the present invention and that of U.S. Pat. No.: 4,102,144 vary, but the apparatus to move and operate the shield are shared. As preferred with this invention the interior volume includes an air chamber with means of adjusting the buoyancy to raise or lower the shield along the marine structure.
Once ice is corralled and floating in the basin annular void between the minimum and maximum portions of the shield the iceberg/s pieces can be broken into smaller pieces using but not limited to using wrecking technology utilized from cranes mounted on the topside working platform high above the waters surface. Also, in tandem instruments such as long range acoustic devices (LRAD) similar to the technology described in U.S. Pat. No.: 7,912,234 can be used to easily demolish large masses of ice into smaller pieces. The result is the creation of more manageable pieces that can be lifted out of the water using the disclosed ramp-like conveyor apparatus and sequentially dumped into the attached heat equipped hopper apparatus equating to the process and melting of large icebergs into usable fresh water. Acoustic waves cause the vibration of air bubbles lodged within the ice, this vibrating easily shatters the ice.
As part of the circular wall of the shield the preferred method of the disclosed invention design is a gate structure within the shield structure. The gate is located laterally in respect to the corralled ice and extends horizontally and vertically as part of the shield surface and forms an interior barrier or gate within the shield that connects the minimum and maximum diameter portions of the shield. As the shield is engaged to rotate the gate provides a means for controlling or transferring the broken ice to the stationary location of the conveyor, hopper, and storage apparatuses. As the shield is turned around the structure it surrounds i.e., pylon and working platform, the corral becomes smaller as the gate pushes ice pieces onto the ramp-like conveyor system. As the gate moves closer to the fixed location of the ramp-like conveyor apparatus and attached hopper apparatus the shield is turned progressively to push the gate against the floating ice, imposing all the ice gathered in the corral to be quickly loaded onto the ramp-like conveyor apparatus to be carried out of the corral. At this point in the described method of harvesting icebergs the corral will be emptied as the gate and conveyor apparatus are at their closest point in respect to their positions. The shield is then lowered and the gate returned to its opened position with the gate and conveyor/hopper structures positioned on opposite sides or at 0 degrees (in line) to the gate in respect to the circular shaped shield. The process is then repeated and the water storage facilities are filled with fresh water produced from reclaimed icebergs.
The preferred method of the invention describes a hopper system designed with a heated auger style blade to simultaneously crush and heat ice to rapidly assist the melting process. Beneath the hopper apparatus is the first stage of the water storage facilities where the crushed ice and melted water fall to fill the semi-submersible chamber that makes of the hollow water tight underwater chamber consisting of all or portions of the pylon. Fresh produced water can be stored inside the body of the substructure and caisson underwater work chamber of the offshore marine platform. Enough water can be produced and stored to fill shipping tankers and or service pipelines. The invention describes but is not limited to water tankers being filled directly at the platform.
In one form of prior art described in U.S. Pat. No.: 4,102,144 this type of shield is mounted for upward, downward, and rotational movement independently of any substantial contact with the marine structure sufficient to impose significant loads on the structure. In another form of this prior art the upward, downward, and rotational movement of the shield is guided by contact with the marine structure. The shield is not fixed to the sea floor and may have its lower extent well above the sea floor. Thus the present shield can be used in any depth of water, and any given shield can be used in any depth of water. Because the shield is vertically movable relative to the structure that it surrounds, its mean position at any time can be adjusted in accordance with mean water level at such time to compensate for tidal effects, for example, as described in U.S. Pat. No.: 4,102,144.
Not Applicable
The present invention provides an iceberg utilization method that takes place at stationary marine structure/s in arctic waters and provides one means to produce fresh water from icebergs. A natural effect of reducing ice melt into the ocean creates a sea level rise countermeasure. The inventions' methods described in this context are not limited to Iceberg Reclamation Industry in arctic regions. Such operations can be performed from offshore iceberg processing and fresh water production platforms having a single upright pylon that supports the platform above the surface of a body of water. One mode here within is described as a monopod type platform because its single supporting pylon is anchored directly in the sea floor; it will be understood that this invention is not limited to use with single-pylon platforms and that, when used with a single pylon platform, the platform need not be of the monopod type. As described in U.S. Pat. No.: 4,102,144 a single pylon platform could have the pylon extending upwardly from a mat structure engaged with and covering a large area of the sea floor, the mat being fixed in place by suitable pilings driven into the subsea geology. The platform can also be of the concrete gravity type or the semi-submersible type that floats but is anchored in a desired position by anchor cables or chains.
Mounted atop the pylons is the platform that supports and carries the working equipment for performing desired operations, such as harvesting, processing, and production of fresh water from moving ice at the water surface.
Typically, the ice sheet/icebergs move laterally relative to the pylon, either constantly or intermittently, and in any direction. For the purpose of this description, it is assumed that the icebergs are moving toward the marine structure/s. As described the invention provides means for selectively utilizing, breaking into, corralling, and melting advancing fresh water ice as to provide usable fresh water to be transported away from the arctic zones and to locations in need of water.
The present invention provides a movable ice breaking and ice-corralling basin shaped shield that surrounds the portion of the platform, i.e. pylon, conveyor apparatus, and hopper apparatus involved in the production of water from advancing icebergs that forms an annular void. The shield is spaced radially from the outer surface of the pylon and confronts the moving ice/sheet/berg irrespective of the direction from which the ice is moving at any given time. A deck or platform at the top of the shield adjacent to the pylon at the minimum diameter portion is located well above the top surface of the floating ice. The platform provides a means of support for equipment for controlling movement of the shield. The shield has an ice contacting wall structure made of concrete of metal, which extends downwardly from the platform into the body of water. The wall structure is primarily basin in shape, outspreading downwardly and radially from the platform and then again inwardly and upwardly toward the pylon forming a mote or void of seawater, designed between the inside minimum diameter portion and the outside maximum diameter portion of the circular shaped shield. As described and referenced in U.S. Pat. No.: 4,102,144 the exterior surface of the wall includes a top section that is curved concavely outwardly below the platform, an intermediate ramp-like section that normally extends along a generally linear slope from well above to well below the zone of potential ice contact, and a lower ramp-like section of steeper slope between the minimum diameter portion and the deck and serves as a deflector of any ice that may be forced high up onto the ramp section. Shield is not connected to the sea floor, and its lower extremities usually are located above the sea floor.
The basin wall structure is open at its bottom and defines an annular void volume in the interior of the shield. At least a portion of the void volume is occupied by a series of open-bottom air chambers for use in ballasting the shield up and down relative to pylon. U.S. Pat. No.: 4,102,144 illustrates this presently preferred arrangement in which six separate air chambers of substantially the same volume are spaced apart circumferentially around the interior of the shield. The inside walls of the air chambers are formed by an upright cylindrical wall structure extending down from the platform and closely surrounds the outside surface of the pylon. The individual air chambers are formed by six equidistantly spaced apart, upright bulkheads that extend radially outwardly from the inner wall structure and are joined at their outer ends to an outer upright cylindrical wall that is concentric with the inner wall. As further described in U.S. Pat. No.: 4,102,144 a horizontally extending, annular bulkhead extends between the inner and outer cylindrical walls to form the upper wall of the individual air chambers. The bottoms of the air chambers are open. The total volume of the chambers is sufficient that when the chambers are filled with air the total buoyancy of the chambers is sufficient to support the shield in its uppermost position in which the lower edge of the shield ramp portion is located very close but below water surface. The shield floats, and its draft determined principally by its ballast condition at any time.
Just as U.S. Pat. No.: 4,102,144 floating shield is raised or lowered relative to the pylon so is the method and apparatus disclosed in this invention. By alternately filling the air chambers with air or emptying the air from them to ballast the shield upwardly or downwardly, respectively. The preferred pneumatic system for controlling the buoyancy of the shield is via a compressor and motor for driving the compressor are installed on the platform of the shield. A manifold for regulating air flow to and from each air chamber independently of the other air chambers includes a separate inlet duct extending from the outlet side of the compressor through the top of each chamber bulkhead, a separate throttle valve for each inlet duct, a separate vent duct extending away from the top bulkhead of each chamber, and a separate shutoff valve for each vent duct. A single shut-off valve for the entire pneumatic biasing system is located on the outlet side of the compressor onboard the platform.
The shield can be raised by pumping air into the top portion of the air chambers through inlet duct in the chambers. This increases the buoyancy of the shield and causes the shield to move upwardly along the pylon. Conversely, the shield can be lowered by venting air from the chambers through the vent ducts to reduce the buoyancy of the shield and cause it to move downwardly along the pylon.
As is described in U.S. Pat. No.: 4,102,144 the present patent embodies several sets of vertically spaced apart, vertically oriented rollers called horizontal-axis rollers located between the outer surface of the pylon and the inside surface of the cylindrical wall structure for upward and downward movement of the shield. The respective sets of rollers are spaced apart circumferentially around the outer surface of the pylon preferably arranged at 60.degree. increments around the pylon.
Prior invention U.S. Pat. No.: 4,102,144 also include means for rotating the shield about the upright axis of the pylon. The embodiment includes thrustors projecting below the bottom annular lip of the shield for turning the shield to any rotational orientation relative to the pylon. The rotational movement of the shield is guided around the pylon by several sets of vertically spaced apart, horizontally orientated rollers called vertical-axis rollers located between the outer surface of the pylon and the inside surface of the cylindrical wall structure. The respective sets of vertical-axis rollers are spaced apart circumferentially around the outer surface of the pylon preferably arranged at 60.degree. increments around the pylon, with each set of vertical-axis rollers being located equidistantly between adjacent sets of vertical-axis rollers. The horizontal and vertical-axis rollers can have rubber tires if desired. U.S. Pat. No.: 4,102,144 illustrates the presently preferred system for supporting the horizontal and vertical-axis rollers reciprocating horizontal movement between the pylon and the shield inner wall structure. Preferably, the vertical-axis rollers are supported by sets of corresponding horizontally positioned double-acting hydraulic rams extending radially between the shield and the pylon; and the horizontal-axis rollers are supported by sets of similarly positioned double-acting rams. The rams are preferably affixed to the shield inner wall structure so the rollers carried by the piston arms of the rams can ride on the outer surface of the pylon when the pistons are extended. The pistons are retracted to move the rollers out of contact with the pylon. As an alternate configuration, U.S. Pat. No.: 4,102,144 describes the rams can be affixed to the pylon so that the rollers can ride on the outer surface of the shield inner wall structure. The rams for the vertical-axis rollers are extended or retracted by hydraulic control system operated by equipment onboard the platform. A separate hydraulic control system operates the rams for the horizontal-axis rollers. The control systems preferably have a cross-connect for alternately extending the rams for the vertical-axis rollers and simultaneously retracting the rams for the horizontal-axis rollers, and vice versa, although the separate sets of rams can be operated independently if desired. The sets of horizontal and vertical-axis rollers may be used only as idler rollers for guiding the travel of the shield along the pylon, or the rollers also may be used to provide drive means to assist moving the shield relative to the pylon. U.S. Pat. No.: 4,102,144 describes the vertical-axis rollers act as drive rollers and have their own gear drive mechanism installed on the platform. The rollers in each set are mounted on a separate common vertically extending drive shaft. Each drive shaft is driven by a separate motor having its output shaft engaged with a spline that, in turn, is connected to a gearbox for transmitting torque at the right angles between the spline and the drive shaft. The spline accommodates the linear retracting and extending motion of the rams for the vertical-axis rollers. The surface of the pylon can be roughened or corrugated to provide good traction for the vertical-axis drive rollers.
A gear drive mechanism and retractable spline similar to that used for the vertical-axis rollers can be used with the horizontal-axis rollers to assist the pneumatic biasing system in raising or lowering the shield, although it is preferred that the horizontal-axis rollers act only as idlers for guiding the upward and downward movement of the shield. As described in U.S. Pat. No.: 4,102,144 the preferred method of using the floating shield, the air level in the air chambers is initially adjusted so that the basin wall structure of the shield is disposed in the path of the advancing iceberg/sheet. Preferably, in this invention the ice is allowed to contact the shield near the top of the maximum diameter portion. This allows a portion of the maximum diameter of the basin wall structure to extend outwardly under the advancing iceberg. As U.S. Pat. No.: 4,102,144 describes the rams are then extended to engage the horizontal-axis rollers with the surface of the pylon. The vertical-axis rollers are retracted. The compressors is then operated to pump air through the inlet ducts into the air chambers to increase buoyancy of the shield, which causes the shield to ride upwardly along the pylon. The horizontal-axis rollers guide the upward travel of the shield along the pylon. The upward movement of the shield causes the outwardly projecting portion of the shield wall structure to apply an upward force against the bottom of the iceberg to progressively break into pieces and that portion of the advancing iceberg that is closest to the pylon becomes corralled with the walls of the shield. For relatively large icebergs the shield may be frequently raised to break the iceberg and then lowered in preparation for the next upstroke. For relatively small advancing icebergs the icebergs can be allowed to float past the maximum diameter portion of the shield wall before entirely raising the shield. Relatively small icebergs will be sufficiently broken down using demolishing tools controlled and located topside on the working platform.
U.S. Pat. No.: 4,102,144 describes in detail how the shield apparatus rotates. In column 7 line 34 the patent describes that while the shield is in its elevated position, the rams are retracted and the rams are simultaneously extended to retract the horizontal-axis rollers and to engage the vertical-axis rollers with the outer surface of the pylon. The thrustors, together with the vertical-axis rollers (if used as drive rollers), are then operated to rotate the shield around the pylon, preferably through an arc of about 180.degree. In the present invention a unique structure here within called the gate forms a barrier across the annular void that connects the minimum diameter portion to the maximum diameter portion of basin shaped shield and is part of the shield structure and will be referred to as part of the shield structure unless otherwise stated. The gate extends downwardly into the body of water, but may or may not extend entirely from the top of the shield to the bottom of the shield. The gate preferably has openings through which water can flow as the shield rotates, but from which ice cannot pass through the gate to control or regulate ice pieces. The gate moves the broken ice pieces that have been broken during the upstroke of the shield as well as ice pieces that have been broken during the demolishing of icebergs from operating wrecking equipment mounted on the topside working platform. The rotation of the shield and gate acts to push and carry ice toward the ramp-like conveyor apparatus.
U.S. Pat. No.: 4,102,144 describes how the present invention heat the exterior surfaces of the shield that will include the gate in this present invention. The interior of the shield and gate preferably includes a series of heating channels for transferring heat to the exterior surface of the shield to melt the bond between the broken ice pieces and the shield surface so as to facilitate ice pieces not freezing onto the exterior surfaces of the shield and gate. Preferably, the shield and gate is heated by circulating a heating fluid at a temperature above the melting temperature of the ice through the heating channels and into direct contact with the inside surface of the shield structure. This heats the exterior of the shield sufficiently to produce a thin film of melted ice water between the broken ice pieces and the shield so that the ice pieces slide down the shield and into the water. As described in the U.S. Pat. No.: 4,102,144 heating channels of the shield, they need not extend around the entire inside surface area of the shield. That is, the shield can be rotated approximately 180.degree. away from its upstream position to activate the gate and load the broken pieces emptying the corral and then rotated back to its initial position facing in the upstream direction. The thrustors can be used to turn the shield to any angular orientation in which the same portion of the shield always confronts the advancing ice flow. Since only that portion of the shield structure that actually works to break and or contact ice pieces needs to be covered by heating channels.
One substantial difference in the present invention and U.S. Pat. No.: 4,102,144 referenced herein is the shape of the shield structure. Here within this invention a basin shaped shield is described apposed to the conical shape described in U.S. Pat. No.: 4,102,144. Other systems can be shared with U.S. Pat. No.: 4,102,144 and are described for illustration purposes but it is not limited to apparatus that are embodied with the referenced invention.
In the form of U.S. Pat. No.: 4,102,144 another ice-breaking shield that is supported for upward, downward and rotational movement independently of the pylon is described that this invention can also embody. In the form of the invention, the surface structure of the basin shaped shield is substantially identical in shape to that of the shield described above.
The separate air tanks described above are replaced with a single continuous annular air chamber. The top of the air chamber is formed by an annular bulkhead extending around the inside of the shield. The shield is held in place around the pylon by a mooring system which includes separate mooring lines extending away from corresponding winches, which preferably have a constant-tension operating mode, onboard the shield platform. The mooring lines extend radially outwardly and downwardly from the shield at equidistantly spaced apart intervals to respective anchors on the ocean floor. Each mooring line extends from its respective winch around a sheave located onboard the shield platform, and then down through the central opening in the shield adjacent the pylon, around a fairlead sheave located at the bottom of the central opening in the shield, and then to the anchor. During use of the shield, air is pumped into or vented from the air chamber to raise or lower the shield, respectively, relative to the pylon. The mooring lines and sheaves, guide the shield vertically up or down relative to the pylon. When moving ice with the gate toward the conveyor elevator apparatus location, the shield can be rotated about the pylon by adjusting the effective lengths of the mooring lines so as to swing the shield through a arc to the conveyor elevator apparatus location. After the ice is loaded onto the conveyor system and lifted out of the ocean, the mooring lines are then used to swing the shield back to its initial position so as to unwind the mooring lines. Anchors are disposed in an appropriate pattern such that, by taking in some and paying out others of the mooring lines, the shield can be turned in either direction a selected amount about the pylon.
In this form of the shield apparatus the entire surface area of the shield in the vicinity of the ramp-like surface of the minimum and maximum diameter portions of the shield surface that contacts icebergs and ice pieces (as well as the gate) is covered with heating channels to heat any portion of the shield surface that contacts ice pieces. The system for heating the surface of the shield preferably includes means for circulating heating fluid to selected areas of the shield structures outer surface may be heated at any given time. The heat channels and circulating heating fluid are used to heat the hot hopper apparatus.
The system for mooring lines supports the shield about the pylon independently of any substantial contact with the pylon. This system has the advantage of preventing lateral overturning loads from being transmitted to the pylon by icebergs contacting the shield. As an alternative, however, U.S. Pat. No.: 4,102,144 describes the shield also can be used with vertical and horizontal axis idler rollers between the inside wall of the shield and the outside surface of the pylon to provide means for guiding the vertical and rotational movement of the shield along the pylon.
In this form of the invention, the basin shield structure is described as extending around all of the platform legs, although it will be understood that a single shield could be used on more than, but not necessarily all, of the legs supporting the offshore structure. The shield is raised or lowered by regulating the air to separate air chambers located in the interior of the shield in much the same manner as the air chambers for the shields described above. The shield is rotated around the multiple platform legs by thrustors located on the bottom of the shield, although a mooring system similar to the system described above may also be used. The platform legs have outwardly extending horizontal-axis idler rollers for guiding the upward and downward movement of the shield relative to the platform legs. The platform legs also have vertical-axis idler rollers for guiding the rotational movement of the shield relative to the platform legs. Preferably, the horizontal-axis guide rollers can be extended into contact with the shield inner wall or retracted from contact with the wall by respective hydraulic rams attached to each of the platform legs. Similarly, as described in U.S. Pat. No.: 4,102,144 the vertical-axis rollers can be extended or retracted by respective hydraulic rams also attached to the platform legs. The hydraulic system for controlling the hydraulic rams preferably includes a cross-connection for simultaneously extending the horizontal-axis rollers and retracting the vertical-axis rollers during vertical movement of the shield, while the horizontal-axis rollers are extended during the rotational movement of the shield around the platform legs, as described in the art of U.S. Pat. No.: 4,102,144.
As is stated in U.S. Pat. No.: 4,102,144 this invention will be further understood to need not include a support fixed to the ocean floor, but may also be used on semisubmersible platform, or the like, as well.
From the forgoing description it will be seen that an Iceberg Reclamation Industry structure according to this invention has many advantages. Because it is functionally separate it may be used with existing offshore platforms to adapt the platforms for use as Iceberg Reclamation platforms or as floating debris collection and processing plants in the ocean. The shield is not fixed to the sea floor, and thus can be used in water of any depth.
Ice pieces that are floating in the annular void corral and imposed towards the ramp-like conveyor apparatus with the movable shield and gate need to be removed from the body of water and carried upwardly to the hopper apparatus.
To get the ice out of the body of water the present invention utilizes a material processing apparatus similar to U.S. Pat. No.:8,025,140 comprising of a conveyor that is rotatable in vertical direction around a horizontal axis that is situated in an element rotatable in horizontal direction relative to the apparatus. The element is articulated to the apparatus at a main point of articulation, and at a point remote from the main point of articulation, articulated to a variable length element which in turn is articulated to the apparatus, and the element is connected to an actuator causing the horizontal rotational movement of the element together with the conveyor, defined by said main point articulation. Iceberg Reclamation Industry style conveyor apparatus is attached to the pylon structure of the marine platform and angled so the load end of the conveyor is submersed in the water while the off-load end extends outwardly and terminates over the hopper apparatus. The conveyor system is the width of the annular void of the basin shaped shield so that floating ice pieces are imposed onto the conveyor and not permitted to pass. Preferably, the ice is transported on 10.degree. angle conveyor for easy loading operation. A conveyor type designed for transport of bulk material form an apparatus that has treated material (ice pieces) in the way the Iceberg Reclamation Industry does to a remote location (hopper apparatus) is desired. U.S. Pat. No.:8,025,140 describes the ideal apparatus that can be used as part of a larger plant that processes material and contains many material flows like described in the present invention. Therefore the Iceberg Reclamation embodies a conveyor designed like U.S. Pat. No.:8,025,140 but is not limited to the material processing apparatus comprising a conveyor described in U.S. Pat. No.:8,025,140.
The hopper apparatus described is laterally located to the conveyor apparatus and is necessarily positioned at the off-loading end of the conveyor and is designed to receive falling ice pieces from the conveyor. The hopper is constructed of metal or concrete and is v-shaped in design and vast in size capable of hopping the amounts of ice being processed by the Iceberg Reclamation plant. The walls of the hopper are heated with channels connected to the heating mechanisms of the shield. The hopper apparatus is attached to the pylon and fixed in position. The duty of the hopper apparatus is to rapidly assist the melting of ice pieces that it is fed and funnels the water produced as well as any remaining frozen ice chunks into the undersea chamber storage facilities. As the ice falls into the v-shaped hopper a heated auger, as part of the hopper, rotates and heats ice contacting it. U.S. Pat. No.: 7,993,048 describes an ideal heated auger that can be utilized and is capable of being heated to 250.degree.F. In the rotary thermal recycling system U.S. Pat. No.: 7,993,048, the invention describes systems that consist of auger units mounted in inclined or declined postures should increased or decreased flow rates and process dwell times be required. This situation is ideal for the present invention as there is a water ice mixture occurring and the auger will generally be mounted in a vertical position. The U.S. Pat. No.: 7,993,048 can operate as a single process unit or can be placed with more than one auger in series of parallel configuration. The prior art patent states that a typical unit size in the mid range capacity off 100 tons of sand per hour throughput would have a 48 inch diameter.times.24 foot contained within a directly heated stationary insulated outer shell called the oven that would be roughly 72″ in outside diameter. This present invention may require a system designed to be three times the size of a mid range capacity.
Generally, the four hopper walls are v-shaped with a narrower opening at the bottom respective to the top. High above the top of the hopper apparatus a hood can be fitted designed to capture the water vapor and steam to utilize the energy produced from the reaction of melting ice at 180.degree.F. U.S. Pat. No.:4,295,333 describes prior art to produce mechanical energy from melting icebergs. As the Iceberg Reclamation Industry produces fresh water from icebergs the process described can take advantage of the mechanical energy produced and embody the necessary technology described in U.S. Pat. No.: 4,295,333 to power the operations of the offshore marine iceberg reclamation plant. By implementing the present method of iceberg utilization described the method will be capable of fully melting ice to produce fresh water.
While the invention has been described with reference to specific embodiments, modifications and variations of the invention may be constructed without departing from the scope of the invention, which is defined in the following claims. The forgoing description has been presented for the purposes of description and example, rather than as an exhaustive catalog of all forms in which the invention can be embodied. Therefore, the following claims are to be read in their broadest light in accordance with the fair teachings of the preceding description, rather than in a respective or literal manner.
4,484,841November 1984 Einstabland405/1954,102,144July 1978Anders405/1954,320,989March 1982Mamo405/52 3,585,802June 1971Frankel405/2114,030,305June 1977Wilson405/61 4,295,333October 1981Camirand, et al 60/6417,912,234March 2011Graber381/1605,885,028March 1999Blanchard405/2106,688,105February 2004 Shick 60/6418,025,140September 2011Whyte, et al.198/317
| Number | Date | Country | |
|---|---|---|---|
| 61471176 | Apr 2011 | US |
