2205 Duplex Stainless Steel Anode Tube for Wet Electrostatic Precipitator

Product Overview

Our 2205 duplex stainless steel anode tube is a high-corrosion-resistant collecting electrode module designed for wet electrostatic precipitators and electric tar precipitators. It is widely used in power plants, steel mills, chemical plants, coking plants, carbon plants, ceramic kilns, biomass boilers, waste incineration, acid washing lines and other systems where flue gas contains high humidity, chloride ions, acid mist, alkali mist, tar mist or condensable aerosols.

The anode tube is formed into a hexagonal honeycomb structure and works together with a central discharge electrode. Under high-voltage DC electric field, fine particles, mist droplets and aerosols are charged, captured on the inner wall of the anode tube and then washed away by the flushing system. Compared with ordinary austenitic stainless steel, 2205 duplex stainless steel offers higher yield strength, better resistance to chloride stress corrosion cracking and improved service life in wet and corrosive environments.

Why Choose 2205 Duplex Stainless Steel

• Higher corrosion resistance than 304/316L: 2205 duplex stainless steel has a PREN value of approximately 34–38, significantly higher than 316L, providing better resistance to pitting and crevice corrosion in chloride-containing environments.

• Strong resistance to stress corrosion cracking: its duplex austenite-ferrite structure effectively resists chloride-induced stress corrosion cracking, which is critical for WESP systems downstream of wet desulfurization or scrubbing towers.

• About twice the yield strength of 316L: higher mechanical strength allows thinner wall design while maintaining structural stability, supporting lightweight and long-life anode modules.

• Suitable for high-humidity wet flue gas: performs well in saturated flue gas below dew point temperature, where acid mist, chloride salts and condensable pollutants may cause severe corrosion.

• Good welding and forming capability: can be processed by laser cutting, rolling, automatic welding and module assembly under controlled welding heat input and cooling conditions.

Structure & Working Principle

• Honeycomb hexagonal anode tube: each hexagonal tube acts as a grounded collecting electrode, forming a compact honeycomb module with high space utilization and uniform electric field distribution.

• Cooperation with discharge electrode: a discharge electrode is suspended in the center of each tube to generate corona discharge and charge dust, mist and aerosol particles.

• Electrostatic collection: charged PM2.5, acid mist, tar mist, alkali mist, SO₃ mist and water droplets migrate to the anode tube wall and are captured.

• Wet flushing cleaning: the flushing system forms a continuous liquid film on the inner tube surface, washing captured pollutants into the drain and preventing tar, salt or dust buildup.

Typical Applications

• Wet flue gas polishing after wet desulfurization, scrubber or absorption tower

• Power plant, steel plant and waste incineration WESP systems

• Coking plant, carbon plant and coal gas tar mist removal

• Chemical plant acid mist, alkali mist and aerosol purification

• Ceramic kiln, biomass boiler and industrial boiler exhaust polishing

• High-chloride, high-humidity and corrosive flue gas environments

Manufacturing & Customization

Wuxi Xinchangyuan Equipment Manufacturing Co., Ltd. manufactures stainless steel WESP modules and anode tube bundles for industrial flue gas treatment. Our capabilities include laser cutting, CNC forming, plate rolling, automatic welding, module assembly and on-site installation support. 2205 duplex stainless steel anode tubes, supporting frames, discharge electrode systems and flushing systems can be customized according to project flue gas composition, corrosion level, air volume and site conditions.

FAQ

Why is 2205 duplex stainless steel used for WESP anode tubes?
Because it offers higher yield strength and better resistance to chloride stress corrosion cracking than 304/316L, making it suitable for wet, acidic and chloride-containing flue gas.

Can 2205 anode tubes be used for tar mist removal?
Yes. They can be applied in electric tar precipitators and WESP systems to remove tar mist, oil mist, acid mist, PM2.5 and fine particulate matter.

What is the difference between 2205 and 316L anode tubes?
2205 has higher strength, higher PREN value and better chloride corrosion resistance. 316L may be acceptable for mild conditions, while 2205 is preferred for harsher wet flue gas.

Can the anode module be customized?
Yes. Tube diameter, length, wall thickness, module quantity, material grade and connection structure can be customized according to actual process 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