发电技术 (Oct 2023)
Energy Saving and Carbon Reduction Analysis of Electrostatic Precipitator Under Double Carbon Background
Abstract
Energy conservation and efficiency improvement under the dual carbon background is the first choice for coal-fired power plants to reduce carbon. The energy efficiency parameters of dry electrostatic precipitator (ESP), wet electrostatic precipitator (WESP), auxiliary equipment and dust removal technology route before and after ultra-low emission transformation were analyzed and evaluated, which could excavate their energy saving and carbon reduction space. Before the transformation of ultra-low emission, the annual CO2 emissions corresponding to the high voltage power consumption of 300 MW, 600 MW and 1000 MW units supporting dry ESP are about 6 000 t, 9 000 t and 14 000 t respectively. In addition, the better the performance of ESP, the higher the corresponding energy consumption and CO2 emission. After the ultra-low emission transformation, the annual CO2 emission corresponding to the high-voltage power supply power consumption of the 1000 MW unit supporting the ESP is about 18 000 t, which increases by about 20% compared with that before the transformation, but could be reduced by about 60% through the energy saving optimization. The annual CO2 emissions corresponding to the high-voltage power supply power consumption of the 300 MW, 600 MW and 1000 MW units supporting the WESP are about 2 000 t, 2500 t and 3400 t, respectively. The low temperature economizer of 630 MW unit could reduce the annual CO2 emission by about 19000 t, and the phase change condenser of 280 t/h furnace could reduce the annual CO2 emission by about 8 000 t. Compared with the WESP removal technology route, the flue gas cooperative treatment technology route of 660 MW unit with low-low temperature ESP removal technology as the core could reduce the annual CO2 emission by about 3 000 t. This paper could provide technical ideas for the carbon emission reduction of subsequent coal-fired power plants.
Keywords
