초록 ▼

An intercooler (3) is provided with heat exchanger surfaces (6) and is arranged in the gas stream between two compressors (1, 2) or two compressor stage groups for compressing a gas. An aftercooler (5) is also provided with heat exchanger surfaces (7) and is arranged after the second compressor (2).

An intercooler (3) is provided with heat exchanger surfaces (6) and is arranged in the gas stream between two compressors (1, 2) or two compressor stage groups for compressing a gas. An aftercooler (5) is also provided with heat exchanger surfaces (7) and is arranged after the second compressor (2). To utilize the waste heat generated in the coolers (3, 5), the heat exchanger surfaces (6, 7) of the intercooler (3) and of the aftercooler (5) are integrated in a steam generator (9) in such a way that the heat exchanger surfaces are connected with the feedwater pump (40, 59) of the steam generator (9).

대표청구항 ▼

What is claimed is: 1. A device for utilizing the waste heat of one or more series-connected compressors or compressor stage groups for compressing a gas, the device comprising: an intercooler arranged in the gas flow between a first and said second of the compressors or between two of the compress

What is claimed is: 1. A device for utilizing the waste heat of one or more series-connected compressors or compressor stage groups for compressing a gas, the device comprising: an intercooler arranged in the gas flow between a first and said second of the compressors or between two of the compressor stage groups, said intercooler having heat exchanger surfaces; a steam turbine driving a generator; a steam generator, said intercooler heat exchanger surfaces being operatively connected to said steam generator, said steam generator having a feedwater preheater, an evaporator, a superheater, a condenser, a degasser and a feedwater pump for said steam turbine; an aftercooler with heat exchanger surfaces arranged downstream of said second compressor or downstream of said compressor stage groups, said intercooler heat exchanger surfaces and said aftercooler heat exchanger surfaces being in series flow communication with said feed preheater and in flow connection with said feedwater pump, said evaporator and said superheater of said steam generator. 2. A device in accordance with claim 1, wherein at least one of said intercooler heat exchanger surfaces is connected as said feedwater preheater, said feedwater preheater being in operative connection with said feedwater pump as a high-pressure feedwater pump of said steam generator. 3. A device in accordance with claim 1, further comprising a water/water heat exchanger arranged upstream of said feedwater preheater of said steam generator or upstream of said intercooler heat exchanger surface, which heat exchanger surface is connected as said feedwater preheater. 4. A device in accordance with claim 1, wherein the compressors are driven by a gas turbine which is followed by a waste heat boiler of said steam generator, said waste heat boiler having a high-pressure part and with a low-pressure part, wherein feedwater flows through the intercooler and aftercooler heat exchanger surfaces, and said intercooler and aftercooler heat exchanger surfaces are connected with one or more said feedwater preheaters of said high-pressure part of said waste heat boiler of said gas turbine. 5. A device in accordance with claim 4, wherein said waste heat boiler is provided with an auxiliary firing unit. 6. A gas compression and waste beat utilization system, comprising: series-connected compressors or compressor stage groups for compressing a gas; an intercooler with intercooler heat exchanger surfaces, said intercooler being arranged in gas flow connection between two of said series-connected compressors or between two of said compressor stage groups; an aftercooler with aftercooler heal exchanger surfaces, said aftercooler being arranged downstream of a last compressor of said series-connected compressors or downstream of said compressor stage groups; a steam turbine driving a generator; a steam generator for said steam turbine, said steam generator having a feedwater preheater, an evaporator, a superheater, a condenser, a degasser and a feedwater pump, said intercooler heat exchanger surfaces and said aftercooler heat exchanger surfaces being in series flow communication with said feed preheater and in flow connection with said feedwater pump of said steam generator to integrate said intercooler heat exchanger surfaces and said aftercooler heat exchanger surfaces into said steam generator. 7. A system in accordance with claim 6, wherein at least a portion of said intercooler heat exchanger is operatively connected as said feedwater preheater, said feedwater preheater bering in operative connection with said feedwater pump as a high-pressure feedwater pump of said steam generator. 8. A system in accordance with claim 6, further comprising a water/water heat exchanger arranged upstream of said feedwater preheater of said steam generator or upstream of said intercooler heat exchanger surface, said heat exchanger surface being connected as said feedwater preheater. 9. A system in accordance with claim 6, further comprising a gas turbine driving said compressors, said gas turbine being in operative connection with a waste heat boiler forming a part of said steam generator, said waste heat boiler having a high-pressure part and a low-pressure part, wherein feedwater flows through said intercooler and aftercooler heat exchanger surfaces and said intercooler and aftercooler heat exchanger surfaces are connected with one or more said feedwater preheaters of said high-pressure part of said waste heat boiler of said gas turbine. 10. A system in accordance with claim 9, wherein said waste heat boiler is provided with an auxiliary firing unit. 11. A gas compression and waste heat utilization system comprising: series-connected compressors or compressor stage groups for compressing a gas; an intercooler arranged in gas flow connection between two of said series-connected compressors or between two of said compressor stage groups; an aftercooler arranged downstream of a last compressor of said series-connected compressors or downstream of said compressor stage groups; a steam turbine; a steam generator for said steam turbine, said steam generator having a feedwater preheater, an evaporator, and a superheater; a feedwater pump flowing a fluid through a circuit including said intercooler, said aftercooler, and said feedwater preheater in series flow communication, and also said evaporator, said superheater, and said steam turbine. 12. A system in accordance with claim 11, wherein: said steam generator also includes a condenser and a degasser; said feedwater pump flows the fluid in series through said intercooler, said aftercooler, said feedwater preheater, said evaporator, said superheater, said steam turbine, said condenser, and said degasser. 13. A system in accordance with claim 11, wherein: said steam turbine includes a high-pressure part and a low-pressure part, said circuit is a high-pressure circuit and includes said high-pressure part of said steam turbine; said steam generator includes another feedwater preheater, another evaporator, and another superheater forming a low-pressure circuit connected to said low-pressure part of said steam turbine; said steam generator has an inlet receiving a waste heat flow and having an outlet discharging the waste heat flow after the waste heat flow has generated steam in the steam generator; said low-pressure circuit is arranged downstream of said high-pressure circuit in said steam generator with respect to the waste heat flow. 14. A system in accordance with claim 13, wherein: said high-pressure circuit includes another feedwater preheater arranged upstream of said intercooler in said high-pressure circuit; said another feedwater preheater is arranged downstream of said low-pressure circuit in said steam generator with respect to the waste heat flow. 15. A system in accordance with claim 13, further comprising: a combustion engine powering said compressors or said compressor stage groups, exhaust from said combustion engine creating the waste heat flow through said steam generator. 16. A system in accordance with claim 15, further comprising: an auxiliary firing unit generating a part of the waste heat flow entering said steam generator.