# US 2014/0360098 A1 · Method and apparatus for gasification > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0360098 A1 - Document ID: US20140360098A1 - Status: Published application - Kind: A1 - Application number: 13/912,034 - Filed: 2013-06-06 - Published: 2014-12-11 - Earliest claimed: 2013-06-06 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: Pravin Sadashiv Naphade; Avish Ivan Dsouza; Richard Anthony De Puy - Web page: https://patentgrep.com/patent/US20140360098A1 ## CPC - C10J 3/723: {Controlling or regulating the gasification process} - C10J 2300/0906: Physical processes, e.g. shredding, comminuting, chopping, sorting - C10J 2300/0909: Drying - C10J 2300/0969: Carbon dioxide - C10J 2300/0976: as steam - C10J 2300/165: integrated with a gas turbine or gas motor - C10J 2300/1653: integrated in a gasification combined cycle [IGCC] - C10J 2300/1675: making use of a steam turbine - C10J 2300/1687: with steam generation - C10J 2300/1815: for carbon dioxide - C10J 2300/1876: with one stream being combustion gas - C10J 2300/1884: with one stream being synthesis gas - C10J 2300/1892: with one stream being water/steam - Y02E 20/16: Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT] - Y02E 20/18: Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS] - Y02P 20/129: Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines - C10J: PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES (synthesis gas from liquid or gaseous hydrocarbons C01B; underground gasification of minerals E21B43/295); CARBURETTING AIR OR OTHER GASES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A gasification system includes a gasifier configured to gasify a feedstock and an oxidant to generate a producer gas, a steam generator configured to supply steam to the gasifier, and a combustion system configured to supply an exhaust gas to the steam generator to produce the steam. The system also includes an exhaust gas injection system located upstream of the gasifier and fluidly coupled to the gasifier. The exhaust gas injection system is configured to supply a portion of the exhaust gas from the combustion system to the gasifier. ## Claims ### Claim 1 A gasification system, comprising: a gasifier configured to gasify a feedstock and an oxidant to generate a producer gas; a steam generator configured to supply steam to the gasifier; a combustion system configured to supply an exhaust gas to the steam generator to produce the steam; and an exhaust gas injection system located upstream of the gasifier and fluidly coupled to the gasifier, wherein the exhaust gas injection system is configured to supply a portion of the exhaust gas from the combustion system to the gasifier. ### Claim 2 (depends on 1) The system of claim 1, comprising a valve configured to apportion the exhaust gas between the steam generator and the exhaust gas injection system. ### Claim 3 (depends on 2) The system of claim 2, wherein the valve is configured to adjust a flow rate of the exhaust gas to the steam generator. ### Claim 4 (depends on 1) The system of claim 1, wherein the exhaust gas injection system comprises a flow inducing device configured to motivate the portion of the exhaust gas through the exhaust gas injection system and into the gasifier. ### Claim 5 (depends on 4) The system of claim 4, wherein the flow inducing device comprises a blower. ### Claim 6 (depends on 4) The system of claim 4, wherein the flow inducing device is configured to increase a pressure differential between the gasifier and the exhaust gas injection system. ### Claim 7 (depends on 1) The system of claim 1, wherein the combustion system comprises a gas turbine engine or a combustion engine. ### Claim 8 (depends on 1) The system of claim 1, wherein the gasifier is configured to transfer the producer gas to the steam generator to transfer heat from the producer gas to a water stream to produce the steam. ### Claim 9 (depends on 1) The system of claim 1, wherein the feedstock comprises at least one of agricultural wastes, wood, saw dust, coal, or a combination thereof. ### Claim 10 (depends on 1) The system of claim 1, comprising an exhaust gas cooler configured to cool the portion of the exhaust gas via heat exchange before entering the gasifier. ### Claim 11 (depends on 10) The system of claim 10, wherein the exhaust gas cooler is an indirect heat exchanger located within the exhaust gas injection system. ### Claim 12 (depends on 1) The system of claim 1, wherein the exhaust gas is cooled via direct heat exchange between the exhaust gas and the oxidant. ### Claim 13 (depends on 1) The system of claim 1, comprising a gas treating system configured to treat the producer gas from the gasifier. ### Claim 14 A method, comprising: providing a fuel source and a gasifying agent to a gasifier; supplying a steam generator fluidly coupled to the gasifier with an exhaust gas from a combustion system to produce a steam; supplying the gasifier with a portion of the exhaust gas, wherein the portion of the exhaust gas flows through an exhaust gas injection system located upstream of the gasifier and fluidly coupled to the gasifier; and gasifying a mixture of the fuel source, the gasifying agent, the steam, and the portion of the exhaust gas in the gasifier to generate a producer gas. ### Claim 15 (depends on 14) The method of claim 14, comprising motivating the flow of the portion of the exhaust gas through the exhaust gas injection system using a flow inducing device configured to motivate the flow of the second portion of the exhaust gas through the exhaust gas injection system and into the gasifier. ### Claim 16 (depends on 14) The method of claim 14, comprising adjusting the flow of the portion of the exhaust gas entering the gasifier with a valve configured to apportion the exhaust gas between the steam generator and the exhaust gas injection system. ### Claim 17 (depends on 14) The method of claim 14, wherein the combustion system comprises a gas turbine engine or a combustion engine. ### Claim 18 (depends on 14) The method of claim 14, comprising transferring heat from the producer gas to a water stream in the steam generator to produce the steam. ### Claim 19 A system, comprising: instructions disposed on a non-transitory, machine readable medium, wherein the instructions are configured to: supply an exhaust gas injection system located upstream of a gasifier with an exhaust gas from a combustion system, wherein the exhaust gas injection system is fluidly coupled to the gasifier; supply a steam generator fluidly coupled to the gasifier with the exhaust gas to produce steam; and gasify a mixture of a feedstock, the steam, and the exhaust gas in the gasifier to generate a producer gas. ### Claim 20 (depends on 19) The system of claim 19, comprising a controller having the instructions. ### Claim 21 (depends on 19) The system of claim 19, wherein the instructions are configured to control operation of an integrated gasification combined cycle (IGCC) power plant having the gasifier.