Coal fired Oxy plant with Flue Gas Heat Recovery

Patent metadata

Field	Value
Publication number	US-9915424-B2
Application number	US-201514675305-A
Country	US
Kind code	B2
Filing date	Mar 31, 2015
Priority date	May 8, 2014
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

A coal fired Oxy boiler power plant with a condensate system, combustion system and post combustion CO2 capture plant configured and arranged to remove CO2 from a flue gas stream generated in the combustion system. The condensation system includes a plurality of serial low pressure heaters arranged in flow series downstream of the pump and at least one parallel low pressure heater arranged fluidly parallel to at least one of the serial low pressure heaters. Flue Gas Heat Recovery System, Flue Gas Condenser and Gas Processing unit are thermally integrated into the condensate system.

First claim

What is claimed is:

1. A coal fired Oxy boiler power plant including:
a condensate system comprising:
a pump for pressuring condensate;
a plurality of serial low pressure heaters arranged in flow series downstream of the pump and numbered sequentially in a direction of condensate flow; and
at least one parallel low pressure heater arranged fluidly parallel to at least one of a first of the serial low pressure heaters,

a CO2 capture system configured and arranged to remove CO2 from a flue gas stream of the boiler having:
a Flue Gas Heat Recovery System having:
a Flue Gas Heat Recovery System heat exchanger; and
a Flue Gas Heat Recovery System thermal fluid line connected to:
the Flue Gas Heat Recovery System heat exchanger; and
the at least one parallel low pressure heater, and

a Gas Processing unit having:
a Gas Processing Unit heat exchanger;
a Gas Processing Unit thermal fluid line connected to:
the at least one parallel low pressure heater; and
the Gas Processing Unit heat exchanger, wherein the Gas Processing Unit thermal fluid line comprises a first end and a second end, the first end and the second end connected to:
 the Flue Gas Heat Recovery System thermal fluid line, wherein the first end of the Gas Processing Unit thermal fluid line is connected to the Flue Gas Heat Recovery System thermal fluid line upstream of the Flue Gas Heat Recovery system heat exchanger, and the second end of the Gas Processing Unit thermal fluid line is connected to the Flue Gas Heat Recovery System thermal fluid line downstream of the Flue Gas Heat Recovery System heat exchanger,

wherein the Flue Gas Heat Recovery System thermal fluid line and the Gas Processing Unit thermal fluid line form a thermal fluid loop.

2. The coal fired Oxy boiler power plant of claim 1 wherein the at least one parallel low pressure heater is arranged in parallel to the first of the serial low pressure heaters and a second of the serial low pressure heaters.

3. The coal fired Oxy boiler power plant of claim 1 wherein the at least one parallel low pressure heater is arranged in parallel to a first of serial low pressure heaters, a second of the serial low pressure heaters and a third of the serial low pressure heaters.

4. The coal fired Oxy boiler power plant of claim 1 wherein the at least one parallel low pressure heater consists of one parallel low pressure heater.

5. The coal fired Oxy boiler power plant of claim 1 further including a zeroth serial low pressure heater in the condensate system upstream of both the at least one parallel low pressure heater and the plurality of serial of low pressure heaters.

6. The coal fired Oxy boiler power plant of claim 5 further including a combustion system comprising an Air Separation Unit, for generating an oxygen rich stream, the Air Separation Unit having an Air Separation Unit heat exchanger with an Air Separation Unit heat exchanger condensate line comprising a first end connected to the condensate system between the pump and the zeroth serial low pressure heater.

7. The coal fired Oxy boiler power plant of claim 5 further comprising a Flue Gas Condenser heat exchanger that includes a Flue Gas Condenser heat exchanger condensate line having:
a first end connected to the condensate system between the pump and the zeroth serial low pressure heater; and
a second end connected to the condensate system between the zeroth serial low pressure heater and the first of the serial low pressure heaters.

8. The coal fired Oxy boiler power plant of claim 1 further including a combustion system having an Air Separation Unit, for generating an oxygen rich stream, the Air Separation Unit having an Air Separation Unit heat exchanger with an Air Separation Unit heat exchanger condensate line connected to the condensate system such that the Air Separation Unit heat exchanger is fluidly parallel to at least two of the serial low pressure heaters.

9. The coal fired Oxy boiler power plant of claim 8 wherein the Air Separation Unit heat exchanger condensate line has a second end, downstream of the Air Separation Unit heat exchanger, connected to the condensate system between a second of the serial low pressure heaters ( 8 ) and a third of the serial low pressure heaters.

10. The coal fired Oxy boiler power plant of claim 8 wherein the Air Separation Unit heat exchanger condensate line has a second end, downstream of the Air Separation Unit heat exchanger, connected to the condensate system between a third of the serial low pressure heater and a fourth of the serial low pressure heaters.

11. A coal fired Oxy boiler power plant including:
a condensate system comprising:
a pump for pressuring condensate;
a plurality of serial low pressure heaters arranged in flow series downstream of the pump and numbered sequentially in a direction of condensate flow; and
at least one parallel low pressure heater arranged fluidly parallel to at least one of a first of the serial low pressure heaters,

a combustion system having an Air Separation Unit, for generating an oxygen rich stream, the Air Separation Unit having an Air Separation Unit heat exchanger with an Air Separation Unit heat exchanger condensate line connected to the condensate system such that the Air Separation Unit heat exchanger is fluidly parallel to at least two of the serial low pressure heaters,
a CO2 capture system configured and arranged to remove CO2 from a flue gas stream of the boiler having:
a Flue Gas Heat Recovery System having:
a Flue Gas Heat Recovery System heat exchanger; and
a Flue Gas Heat Recovery System thermal fluid line connected to:
the Flue Gas Heat Recovery System heat exchanger; and
the at least one parallel low pressure heater,

a Gas Processing unit having:
a Gas Processing Unit heat exchanger;
a Gas Processing Unit thermal fluid line connected to:
the Gas Processing Unit heat exchanger; and
the at least one parallel low pressure heater, and

a Flue Gas Condenser heat exchanger having:
a Flue Gas Condenser heat exchanger condensate line that is thermally connected to the Flue Gas Condenser heat exchanger, the Flue Gas Condenser heat exchanger condensate line having:
a first end connected to the condensate system between the pump and the first of the serial low pressure heaters; and
a second end connected to the condensate system between the first end and the first of the serial low pressure heaters,

wherein the Air Separation Unit heat exchanger condensate line has an upstream end connected to the condensate system between the second end of the Flue Gas Condenser heat exchanger condensate line and the first of the serial low pressure heaters, and
wherein the Flue Gas Heat Recovery System thermal fluid line and the Gas Processing Unit thermal fluid line form a thermal fluid loop.

12. A coal fired Oxy boiler power plant including:
a condensate system comprising:
a pump for pressuring condensate;
a plurality of serial low pressure heaters arranged in flow series downstream of the pump and numbered sequentially in a direction of condensate flow; and
at least one parallel low pressure heater arranged fluidly parallel to at least one of a first of the serial low pressure heaters,

a combustion system having an Air Separation Unit, for generating an oxygen rich stream, the Air Separation Unit having an Air Separation Unit heat exchanger with an Air Separation Unit heat exchanger condensate line connected to the condensate system such that the Air Separation Unit heat exchanger is fluidly parallel to at least two of the serial low pressure heaters,
a CO2 capture system configured and arranged to remove CO2 from a flue gas stream of the boiler

Assignees

• General Electric Technology Gmbh

Inventors

• Pourchot Thierry
• Granier Francois
• Geiger Frederic

Classifications

• F01K13/00 Primary

  General layout or general methods of operation of complete plants · CPC title

• F23J15/02

  of purifiers, e.g. for removing noxious material (traps for solid residues F23J3/04) · CPC title

• F23L7/007 Primary

  Supplying oxygen or oxygen-enriched air · CPC title

• F23J2215/50

  Carbon dioxide · CPC title

• F23J15/06

  of coolers · CPC title