# US 2014/0150758 A1 · Exhaust gas recirculation system with condensate removal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0150758 A1 - Document ID: US20140150758A1 - Status: Published application - Kind: A1 - Application number: 13/693,558 - Filed: 2012-12-04 - Published: 2014-06-05 - Earliest claimed: 2012-12-04 - Assignees: General Electric Company - Applicants: General Electric Company - Inventors: James Richard Zurlo; Brian Murphy; Kevin Paul Konkle - Web page: https://patentgrep.com/patent/US20140150758A1 ## CPC - F02M 26/24: with two or more coolers - F02M 26/30: Connections of coolers to other devices, e.g. to valves, heaters, compressors or filters; Coolers characterised by their location on the engine - F02M 26/35: with means for cleaning or treating the recirculated gases, e.g. catalysts, condensate traps, particle filters or heaters - F02M 26/50: Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities (arrangement or layout of EGR passages with means for cleaning or treating the recirculated gases F02M26/35; protection of EGR valves from damage F02M26/74) - F02M: SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF ## Abstract A system for recirculating exhaust gas includes a cooling subsystem configured to cool the exhaust gas; a condensation removal subsystem; and a temperature adjustment subsystem. The cooling subsystem may include a first cooling component configured to cool the exhaust gas to a first intermediate temperature and a second cooling component configured to cool the exhaust gas to a temperature below the saturation temperature. The condensation removal subsystem may include a mist eliminator configured to remove condensate and particulate matter from the exhaust gas and a reheater where exhaust gas is reheated to above the saturation temperature. ## Claims ### Claim 1 A system for recirculating exhaust gas, comprising: a cooling subsystem configured to cool the exhaust gas; a condensation removal subsystem; and a temperature adjustment subsystem. ### Claim 2 (depends on 1) The system of claim 1, wherein the cooling subsystem is configured to cool the exhaust gas to below a saturation temperature. ### Claim 3 (depends on 1) The system of claim 1, wherein the temperature adjustment subsystem is configured to increase the temperature of the exhaust gas to above the saturation temperature. ### Claim 4 (depends on 1) The system of claim 1, wherein the cooling subsystem comprises a first cooling component configured to cool the exhaust gas to a first intermediate temperature and a second cooling component configured to cool the exhaust gas to a temperature below a saturation temperature. ### Claim 5 (depends on 1) The system of claim 1, wherein the cooling subsystem comprises a heat exchanger. ### Claim 6 (depends on 5) The system of claim 5, wherein the heat exchanger comprises a heat exchanger selected from among a group consisting of a shell and tube heat exchanger; a plate heat exchanger; a plate and shell heat exchanger; and a plate fin heat exchanger. ### Claim 7 (depends on 1) The system of claim 1, wherein the condensation removal subsystem comprises a mist eliminator configured to remove condensate from the exhaust gas. ### Claim 8 (depends on 1) The system of claim 1 wherein the condensation removal subsystem comprises a mist eliminator configured to function as an absorber. ### Claim 9 (depends on 1) The system of claim 1 herein the condensation removal subsystem comprises a mist eliminator configured to function as a scrubber. ### Claim 10 (depends on 7) The system of claim 7, wherein the condensation removal subsystem further comprises a conduit for removing the condensate from the mist eliminator. ### Claim 11 (depends on 10) The system of claim 10 wherein the condensate comprises a mixture of water, dissolved organic compounds and solid particles. ### Claim 12 (depends on 7) The system of claim 7, wherein the mist eliminator comprises a mist eliminator selected from among a group consisting of a mesh type, a vane type, a centrifugal type, a sonic type, an electromagnetic type, a baffle type, and an electrostatic type. ### Claim 13 (depends on 12) The system of claim 12 further comprising a valve disposed on the conduit. ### Claim 14 (depends on 13) The system of claim 13, further comprising a control subsystem for controlling the valve. ### Claim 15 An engine, comprising: a combustion chamber wherein fuel is combusted producing an exhaust gas at a first temperature; an exhaust system coupled with the combustion chamber that collects the exhaust gas; an exhaust gas cooling system configured to reduce exhaust gas temperature to below a saturation temperature; a condensate removal system coupled with the exhaust gas cooling system configured to precipitate a condensate from the exhaust gas; and an intake system coupled with the condensate removal system and the combustion chamber. ### Claim 16 (depends on 15) The engine of claim 15, wherein the exhaust gas cooling system comprises: a first cooler configured to cool the exhaust gas to a first temperature; and a second cooler configured to cool the exhaust gas to below the saturation temperature. ### Claim 17 (depends on 15) The engine of claim 15, wherein the condensate removal system comprises a mist eliminator. ### Claim 18 (depends on 17) The engine of claim 17, further comprising a conduit coupled with the mist eliminator configured to remove water and particulate matter. ### Claim 19 (depends on 15) The engine of claim 15, further comprising an exhaust gas reheating system configured to reheat the exhaust gas to a temperature above the saturation temperature. ### Claim 20 A method of recirculating exhaust gas, comprising: cooling the exhaust gas to a temperature below a saturation temperature; removing condensate from the exhaust gas; and heating the exhaust gas to a temperature above the saturation temperature. ### Claim 21 (depends on 20) The method of claim 20, wherein cooling the exhaust gas to a temperature below a saturation temperature comprises: cooling the exhaust gas to a first intermediate temperature; and cooling the exhaust gas to a temperature below a steam saturation temperature. ### Claim 22 (depends on 20) The method of claim 20, wherein removing condensate from the exhaust gas comprises passing the exhaust gas though a mist eliminator to remove condensate and particulates ### Claim 23 (depends on 20) The method of claim 20, wherein heating the exhaust gas to a temperature above the saturation temperature comprises passing the exhaust gas through a heat exchanger configured to reheat the exhaust gas to above the steam saturation temperature. ### Claim 24 (depends on 20) The method of claim 20, further comprising controlling a mass flow rate of the exhaust gas. ### Claim 25 (depends on 20) The method of claim 20, wherein removing condensate from the exhaust comprises removing condensate droplets and solids attached to the condensate droplets. ### Claim 26 (depends on 20) The method of claim 20, wherein removing condensate from the exhaust comprises removing condensate droplets and liquids attached to the condensate droplets. ### Claim 27 (depends on 20) The method of claim 20, wherein removing condensate from the exhaust comprises removing condensate droplets and liquids dissolved in the condensate droplets. ### Claim 28 (depends on 20) The method of claim 20, wherein removing condensate from the exhaust comprises removing condensate droplets and gaseous components absorbed into the droplets.