Claims
- 1. In a method for the discharge and recovery of condensates in a system of production and distribution of condensable vapor in a closed circuit at approximately constant pressure and temperature, in which the system includes at least one evaporating boiler and serving at least two systems of stations utilizing vapor at a high-pressure and a low-pressure, respectively, the said method including the steps of vapor feeding the said low-pressure system of stations by expanding part of the vapor feeding the said high-pressure system of stations, and recovering at least part of the condensates discharged from each system of stations by directing a substantially dry and at least mostly natural gravitational return-flow to an individual storage, collecting and accumulating same at least temporarily therein; reintroducing at least the condensates from the storage of the said high-pressure system of stations into the boiler with automatic control of the rate of outflow of the condensates proceeding from the said storage of the said low-pressure system of stations, said control being effected in particular by detecting the instant amount of condensates present in the said low pressure system of stations and interlocking floating on-off type control means in follow-up relationship with the detected instant amount of condensates present in the said storage of the said low-pressure system of stations; automatically controlling the rate of inflow of the condensates into the said storage of the said low-pressure system of stations by measuring the instant amount of condensates in the said storage of the said low-pressure system and interlocking floating on-off type control means in follow-up relationship with the measured instant amount of condensates in the said storage of the said low-pressure system; controlling the rates of inflow and outflow, respectively, in mutually opposite relationship stopping said inflow when the said outflow is taking place and vice versa; isolating the said storage of the low-pressure system from the said low-pressure system by stopping the inflow of condensates proceeding from said low pressure systems, then, equalizing the respective pressures in the two storages of the two systems of stations by effecting communication between said storages and discharging the condensates from the said storage of the low-pressure system gravitationally into the said storage of the high-pressure system.
- 2. A condensate transfer lock device for transferring condensates from a low pressure network into a high pressure network in a system for the generation, distribution and utilization of condensable vapor, said system being of the type comprising at least two systems utilizing vapor at a high pressure and a low pressure, respectively, each system having at least one live vapor supply line feeding heat-exchange apparatus mounted in parallel and with at least one condensate return line discharging the said condensates from the respective apparatus and opening into the upper portion of at least one buffer-tank located at the general low point of the respective utilizer system considered, at least one of the two buffer-tanks having a level controller including a monitoring member and a vapor expansion valve connecting the said low-pressure live vapor supply line in branched-off relationship to the said high-pressure live vapor line, means connecting the said high-pressure buffer-tank to the said boiler, said connecting means comprising condensate reintroduction piping starting from the bottom of the said high-pressure buffer-tank, the said low-pressure buffer-tank being positioned above the said high-pressure buffer-tank, a drain conduit connecting the base of the said low-pressure buffer-tank to the top of the high-pressure buffer-tank and permanently communicating with the said high-pressure condensate return line, the said low-pressure condensate return line and the said drain conduit having, respectively, two servo-motor-actuated stop valves, said stop valves located respectively up-stream and down-stream of the said buffer-tank and remote-control transmission means connecting the servo-motors of said stop valves respectively to the monitoring member of the said level controller.
- 3. A device according to claim 2, wherein the up-stream end of the said drain conduit penetrates into the said low-pressure buffer-tank up to the upper portion of the said low-pressure buffer-tank through a substantially vertical tube provided with orifices at its base.
Priority Claims (3)
Number |
Date |
Country |
Kind |
75 34705 |
Nov 1975 |
FRX |
|
76 27510 |
Sep 1976 |
FRX |
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76 27511 |
Sep 1976 |
FRX |
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Parent Case Info
This is a division of U.S. patent application Ser. No. 741,339 filed on Nov. 12, 1976, now U.S. Pat. No. 4,177,767 granted Dec. 11, 1979.
US Referenced Citations (8)
Divisions (1)
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Number |
Date |
Country |
Parent |
741339 |
Nov 1976 |
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