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US 12,601,292 B1Granted
Systems and methods for steam supply to gas capture system during shutdown
AssigneeGE Vernova Infrastructure Technology LLC
InventorsCristian Ruga, Hongtao Li
Life of this patent
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Abstract
A system may include a gas capture system comprising a separation material, wherein the gas capture system is configured to operate a regeneration process during a part load operation and/or a shutdown operation to desorb undesirable gas from the separation material to regenerate the separation material for an absorption process, a heat recovery steam generator (HSRG) configured to receive exhaust gas and generate steam, and a backup line fluidly coupling the gas capture system to the HRSG, wherein the backup line is configured to provide the steam from the HRSG to the gas capture system for the regeneration process during the part load operation and/or the shutdown operation.
Claims22
A system, comprising:
- a gas capture system comprising a separation material, wherein the gas capture system is configured to operate a regeneration process during a part load operation and/or a shutdown operation to desorb undesirable gas from the separation material to regenerate the separation material for an absorption process;
- a heat recovery steam generator (HSRG) configured to receive exhaust gas and generate steam;
- and
- a backup line fluidly coupling the gas capture system to the HRSG, wherein the backup line is configured to provide the steam from the HRSG to the gas capture system for the regeneration process during the part load operation and/or the shutdown operation, wherein the system further comprises:
- a first attemperator coupled to the backup line, a pressure reduction valve, and a safety valve coupled to the backup line, wherein the first attemperator is configured to control a temperature of the steam along the backup line, the pressure reduction valve is configured to control a pressure of steam for the regeneration process, and the safety valve is configured to release the steam if a steam pressure exceeds a pressure threshold;
- or
- a second attemperator coupled to a main extraction line, wherein the second attemperator is configured to control a temperature of the steam along the main extraction line, the backup line is configured to provide the steam to the main extraction line fluidly coupled to the gas capture system, and an attemperation water source is configured to inject water into the second attemperator along the main extraction line based on the temperature of the steam being greater than a temperature control setpoint for the regeneration process;
- or
- a steam turbine fluidly coupled to the HRSG via a set of valves and a controller communicatively coupled to the set of valves, wherein the controller is configured to control each valve of the set of valves to at least partially close based on receiving an indication to initiate the part load operation and/or the shutdown operation, wherein the controller is configured to monitor the regeneration process of the gas capture system and the steam from the HRSG, and start supplying steam from an additional steam provision source to support the regeneration process of the gas capture system based on an amount of the steam from the HRSG being less than a threshold steam supply;
- or
- any combination thereof.
8 more elements
A system, comprising:
- a plant comprising:
- a gas turbine configured to output an exhaust gas;
- a heat recovery steam generator (HRSG) configured to receive the exhaust gas and output steam;
- a steam turbine configured to receive the steam;
- and
- a carbon capture system configured to capture an undesirable gas from the exhaust gas in a separation material;
- and
- a controller configured to initiate a part load operation and/or a shutdown operation of the plant by:
- controlling the gas turbine to reduce to a part load condition and continue to output the exhaust gas;
- controlling a first set of valves to at least partially close to reduce or disable flow of the steam to the steam turbine;
- and
- controlling a second set of valves to enable or increase flow of the steam from the HRSG to the carbon capture system via a backup line for a period of time to perform a regeneration process on the separation material.
9 more elements
A method, comprising:
- initiating a shutdown operation or a part load operation of a plant having a gas turbine, a steam turbine, a heat recovery steam generator (HRSG), and a carbon capture system having a separation material;
- controlling the gas turbine to reduce to a part load condition;
- controlling a first set of valves to at least partially close to reduce or disable flow of a steam to the steam turbine;
- and
- controlling a second set of valves coupled to a backup line to enable or increase flow of the steam from the HRSG to the carbon capture system to perform a regeneration process on the separation material.
2 more elements
Dependencies are inferred from the claim text.