Study on WESP Multi-pollutant Emission Reduction and Energy Efficiency Test of Ultra-low Emission Unit

Abstract

Wet electrostatic precipitator (WESP) is a fine treatment equipment for the treatment of coal flue gas. Taking a 660 MW ultra-low emission unit as the research object, the multi-pollutant removal performance and energy efficiency parameters of WESP were tested and analyzed systematically. The removal efficiencies of particulate matter, fog drop, SO3 and Hg of WESP were 81.12%, 75.60%, 76.13% and 53.08%, respectively, and the power consumption was 402.6 (kW·h)/h, which met the design requirements. The emission mass concentration of each pollutant were 4.20, 17.25, 9.80, 4.08×10-4 mg/m3, respectively, the emission factors were 13.76, 56.49, 32.10, 1.34×10-3 g/(kW·h),respectively, the specific power consumption was 1.48×10-4 (kW·h)/m3.The energy consumption for particle removal per unit mass was 22.87 (kW·h)/kg, which was in the industry average level. This study can provide reference for the subsequent pollutant reduction and energy efficiency control of coal-fired power plants.

Keywords

• wet electrostatic precipitator (wesp)
• coal-fired power plant
• pollutant emission reduction
• removal efficiency
• indicators of energy efficiency