The desulphurization system of coal-fired boiler for 200 MW unit in Jiulong Power Generation Co Ltd

a branch company of Chongqing Jiulong Electric Power Co Ltd

has been retrofitted

a new type gas-gas heat exchanger(GGHE) adopting firstly the three-dimentional inner ribs at the tube side for strengthening the heat exchange being designed

enhancing the heat exchange efficiency by a big margin.After retrofitting

the GGHE hasn't spechial requirement for boosting in the system

the exhaust gas temperature of purified gas basically satisfying the requirement of pollutant emission

effectively enchancing the desulphurizing efficiency

increasing the economic effectiveness of power plant.The retrofit has remarkable economic effect

there is no need to heat with steam

reducing coal consumption for power generation by 6.7 g/kW·h

saving expense of desalted water by 130 yuan/h

the temperature of flue gas entering absorption tower for desulphurization being lowered

decreasing water quantity for evaporation

saving water by 20 t/h.