Abstract: An air-cooled condensing heat exchanger system (“ACHX”) installed in a fossil power plant flue gas treatment system recovers water and low temperature waste heat from boiler flue gas for advanced coal fired power plant applications. More particularly, the ACHX system recovers water from combustion flue gas by phase change. To recover water from flue gas, the ACHX system uses ambient air from an air intake installed on the stack to cool down the flue gas in the ACHX.

Abstract: The system and method spatially predict the condensation of water and acid from the flue gas in the condensing heat exchanger installed in fossil power plant flue gas treatment system or similar environment. By modifying the operational conditions, the heat exchanger can control rates and areas of condensations. The system and method adjust either the cooling water temperature or the flowrate ratio of flue gas to cooling water to control the condensation rates of water or acids. The system and method also estimate actual coverage areas to apply for anti-corrosive coating onto the tube or duct surfaces to resist corrosion due to acid condensation. The system and method also optimize or customize condensation rates of water and acids in boiler flue gas under operating conditions given at a power plant.

Abstract: An integrated reaction condensing heat exchanger system (“IRCHX”) may be installed in a fossil power plant flue gas treatment system. More particularly, the IRCHX system may be used for recovering water from combustion flue gas by phase change to reduce fresh water consumption in fossil power plants including coal-, oil- and gas-fired plants. To recover water from flue gas, the IRCHX system may be installed in a current flue gas treatment system in a new or existing power plant, which allows power plants to save fresh water consumption up to 20%. Additionally, it benefits: 1) low temperature heat recovery after economizer, 2) lower exhaust temperature of flue gas at stack, 3) lower moisture contents in exhaust flue gas at stack, and 4) reduced acid emission in flue gas at stack.

Abstract: The system and method spatially predict the condensation of water and acid from the flue gas in the condensing heat exchanger installed in fossil power plant flue gas treatment system or similar environment. By modifying the operational conditions, the heat exchanger can control rates and areas of condensations. The system and method adjust either the cooling water temperature or the flowrate ratio of flue gas to cooling water to control the condensation rates of water or acids. The system and method also estimate actual coverage areas to apply for anti-corrosive coating onto the tube or duct surfaces to resist corrosion due to acid condensation. The system and method also optimize or customize condensation rates of water and acids in boiler flue gas under operating conditions given at a power plant.