# US 2014/0150699 A1 · Method and fossil-fuel-fired power plant for recovering a condensate

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- Number: US 2014/0150699 A1
- Document ID: US20140150699A1
- Status: Published application
- Kind: A1
- Application number: 14/234,898
- Filed: 2012-07-24
- Published: 2014-06-05
- Earliest claimed: 2011-07-29
- Assignees: Siemens Aktiengesellschaft
- Inventors: Rudiger Schneider; Henning Schramm
- Web page: https://patentgrep.com/patent/US20140150699A1

## CPC

- B01D 53/1475: {Removing carbon dioxide}
- B01D 53/002: {by condensation}
- F01K 23/10: with exhaust fluid of one cycle heating the fluid in another cycle (F01K17/025 takes precedence)
- F23J 15/02: of purifiers, e.g. for removing noxious material (traps for solid residues F23J3/04)
- Y02C 20/40: of CO2
- Y02E 20/32: Direct CO2 mitigation
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- F01K: STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants F02; nuclear power plants, engine arrangements therein G21D)
- F23J: REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES (combustion apparatus for consuming smoke or fumes, e.g. exhaust gases, F23G7/06)
- Y02C: CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A fossil-fuel-fired power plant, having a combustion device, a CO2 separation device, which is arranged downstream of the fossil-fuel-fired power plant, for removing CO2, and a CO2 compressor station, which is arranged downstream of the CO2 separation device and which has a number of compressor stages and coolers for intermediate cooling is provided. The coolers are connected to the CO2 separation device or the fossil-fuel-fired power plant by means of a condensate line in order to recover condensate. A method for carrying out the condensate recovery is also provided.

## Claims

### Claim at position 1

1-10. (canceled)

### Claim 11

A fossil-fired power plant comprising:
a fossil-fired combustion apparatus with separation of flue gas,
a CO2 separation apparatus, connected downstream to the fossil-fired power plant, for separating CO2 from the flue gas, comprising an absorber and a desorber which are connected into an absorption medium circuit, and
a CO2 compressor station, connected downstream to the CO2 separation apparatus and connected to the desorber for discharging separated CO2, and which for liquefying the separated CO2 comprises a compressor with a number of compressor stages,
wherein a cooler, or a plurality of coolers, is or are connected between the compressor stages for the intercooling of the compressed CO2, and
wherein the cooler is connected via a condensate line to the absorption medium circuit of the CO2 separation apparatus so that water which condenses during the intercooling of the CO2 can be provided as makeup water flow for the CO2 separation apparatus.

### Claim 12

A fossil-fired power plant comprising:
a fossil-fired combustion apparatus with separation of flue gas,
a CO2 separation apparatus, connected downstream to the fossil-fired power plant, for separating CO2 from the flue gas, comprising an absorber and a desorber which are connected into an absorption medium circuit, and
a CO2 compressor station, connected downstream to the CO2 separation apparatus and connected to the desorber for discharging separated CO2, and which for liquefying the separated CO2 comprises a compressor with a number of compressor stages,
wherein a cooler, or a plurality of coolers, is or are connected between the compressor stages for the intercooling of the compressed CO2, and
wherein the cooler is connected via a condensate line to a treatment plant of the fossil-fired power plant for providing demineralized water so that water which condenses during the intercooling of the CO2 can be made available to the treatment plant as prepurified water.

### Claim 13

A method for the recovery of condensate, which is a constituent of a fossil-fired power plant process, to which a CO2 separation process is connected downstream, wherein a compressor process is connected downstream to the CO2 separation process and comprises a number of process stages between which a cooling process is connected in each case, comprising:
extracting condensate from the cooling processes, and
feeding the extracted condensate as prepurified water to a treatment process for demineralized water which comprises the power plant process.

### Claim 14

A method for the recovery of condensate, which is a constituent of a fossil-fired power plant process, to which a CO2 separation process is connected downstream, wherein a compressor process is connected downstream to the CO2 separation process and comprises a number of process stages between which a cooling process is connected in each case, comprising:
extracting condensate from the cooling processes, and
feeding the extracted condensate as makeup water to the CO2 separation process of a water circuit which includes an absorption and desorption process.