Abstract:

As the vigorous development of renewable energy,coalfired power plants are facing severe challenge in energy saving and consumption reduction. In order to reduce the energy consumption of pulverizing systems, intensive study was made on consumption reduction by controlling thetemperature at mill outlet and optimizing primary air pressure，and thecoupling relationship between the two controlling strategies. The optimal optimization strategy was determined after theoretical analysis. The optimization test was carried out fromcontrollingthe temperature at mill outlet tooptimizing the primary air pressure. The temperature at mill out goes up to 80℃ after the test, and the primary air pressure can be controlled at 6.5,8.0 and 9.0kPa respectively under the load of 300, 450 and 600MW.The curve of primary air pressure changing with the load is given. After the optimization, the coal consumption of the unit can be reduced by 0.38g/(kW·h).The optimization is of good economic benefits, and can provide reference for energy saving for pulverizing systems.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">mediumfont-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">speed mill, pulverizing system;temperature at mill outlet, primary air pressure, energy conservation, renewable energy