Wet Electrostatic Precipitator for Coal-Fired Power Plants

Product Overview

Our wet electrostatic precipitator for coal-fired power plants is a customized WESP system designed for terminal flue gas polishing after wet flue gas desulfurization. It can be applied to coal-fired utility boilers, industrial coal-fired boilers, biomass-coal co-firing units and related coal combustion flue gas streams. The equipment is typically installed downstream of ESP, bag filter, electrostatic bag filter, spray tower, scrubber or wet desulfurization systems to perform deep purification of saturated wet flue gas. It helps power plants and industrial boiler users control PM2.5, SO₃ acid mist, gypsum mist, aerosols, water droplets, condensable particulate matter and fine fly ash, supporting ultra-low emission and visible plume reduction requirements.

The equipment adopts high-voltage electrostatic adsorption combined with wet flushing. Fine particles, acid mist and aerosols in wet flue gas are charged in the electric field, captured on the collecting electrode surface, and then washed away by circulating water. Unlike dry electrostatic precipitators, WESP uses water film or spray cleaning instead of mechanical rapping, which avoids secondary dust and is especially suitable for high-humidity, corrosive and sticky flue gas conditions after desulfurization.

How It Works

• Gas ionization and particle charging: High-voltage DC power generates a strong electric field between the anode tubes/plates and cathode wires, causing gas ionization and particle charging.

• Fine particle and mist collection: Charged PM2.5, SO₃ acid mist, gypsum mist, aerosols, droplets and fine fly ash migrate to the collecting electrode and are captured on the electrode surface.

• Wet flushing cleaning: The flushing system forms a continuous water film to wash captured pollutants into the drain, preventing gypsum accumulation, salt deposition and secondary dust.

• Terminal polishing after desulfurization: When arranged after ESP, bag filter, scrubber or wet flue gas desulfurization, the WESP further removes residual fine particles, mist droplets and aerosols from saturated coal-fired flue gas.

Key Features

• High removal efficiency for fine coal-fired aerosols: effectively captures PM2.5, submicron particles, SO₃ acid mist, gypsum mist, droplets and aerosols.

• No secondary dust emission: wet flushing replaces mechanical rapping, improving outlet cleanliness and operational stability.

• Strong adaptability to saturated desulfurization flue gas: suitable for high-moisture, low-temperature and corrosive flue gas downstream of wet FGD systems.

• Stainless steel anode tube modules: anode modules, shell and internal components can be made from stainless steel or other corrosion-resistant materials according to flue gas composition.

• Flexible structural layout: available in vertical or horizontal type, with circular or square shell, and can be integrated with existing ESP, bag filter, FGD and stack systems.

• Customized engineering supply: configured according to actual flue gas volume, temperature, humidity, dust/mist load, installation space and emission requirements.

Typical Applications

• Terminal polishing for coal-fired utility boiler flue gas

• Industrial coal-fired boiler and biomass-coal co-firing exhaust treatment

• Deep purification after wet flue gas desulfurization

• Removal of PM2.5, SO₃ acid mist, gypsum mist, aerosols and fine fly ash

• Visible plume control and stack emission polishing

• Retrofit projects for ESP, bag filter, FGD and multi-pollutant control systems

Manufacturing & Customization

Wuxi Xinchangyuan Equipment Manufacturing Co., Ltd. manufactures stainless steel WESP modules and supporting components for industrial flue gas and exhaust treatment. The company’s capabilities include laser cutting, CNC shearing, CNC press brake forming, plate rolling, automatic welding and on-site assembly. Stainless steel anode tube modules, cathode systems, flushing systems and shell structures can be customized according to project flue gas volume, installation space and process conditions, supporting both new coal-fired power/boiler projects and retrofit projects.

FAQ

Where is the coal-fired plant WESP typically installed?
It is usually installed downstream of ESP, bag filter, scrubber or wet flue gas desulfurization systems for terminal deep purification of saturated flue gas.

What pollutants can it remove?
It mainly removes PM2.5, SO₃ acid mist, gypsum mist, aerosols, water droplets, condensable particulate matter and fine fly ash from wet coal-fired flue gas.

What materials can be used?
Anode modules, shell and internal components can be made from stainless steel or other corrosion-resistant materials based on flue gas composition and customer requirements.

Is the equipment available in different structures?
Yes. It can be supplied in vertical or horizontal structure, with circular or square shell, and can be customized according to site conditions.

Tel：+86 13656199922

Phone：+86 13656199922

Email：wxxcysbzzyxgs@163.com

Address：35-3 Yanqiao Road, Yanqiao Street, Huishan District, Wuxi City, Jiangsu Province, China