Canadian Biomass Magazine

Equipment Quality Control
‘Next generation’ WESP is advancement in air pollution control


February 17, 2021
By Dürr Megtec
More efficient contaminant capture was achieved through increased operating voltage that requires less collecting surface area. The gas distribution system was reimagined to optimize flow through the system.

Dürr Megtec’s “next generation” of wet electrostatic precipitator (WESP) has been released.

The air pollution control system efficiently cleans industrial gases of fine particulate matter, acid mists and aerosols to meet global environmental regulations and protects downstream equipment. Notable improvements include decreased maintenance, enhanced performance, standardization and faster installation times.

Dürr Megtec designed the new WESP with both the environment and its customers’ operations and maintenance teams in mind. As a result, the focus was placed on the system’s high-intensity, offline automatic cleaning features, which reduce maintenance efforts, eliminate carryover of entrained matter during washing and provide better operational performance during cleaning. System components are also now easily accessible for maintenance inspections.

Increased efficiency

Advertisement

In order to enhance the performance of its WESP, Dürr Megtec aimed at achieving a more efficient contaminant capture. This was achieved through increased operating voltage that requires less collecting surface area. Additionally, the gas distribution system was completely reimagined to optimize flow through the system, and various tube shapes and electrodes were tested to improve overall performance.

Reduced fabrication and installation time

Standardized modules are used in the new design, thus reducing engineering time and streamlining fabrication. The systems are assembled from different standard modules and adapted to customer-specific requirements.

The “next generation” WESP allows for faster installation times. Modules with tube bundles are pre-assembled in Dürr’s production facility for shipment to the customer. All electrodes are pre-loaded and pre-aligned, thus avoiding this lengthy and tedious task on the construction site. The manufacturing and installation timeline of the advanced Dürr product is significantly lower. 

WESP air pollution control systems are used in all sectors of industry, including wood, waste incineration, food processing, biofuels, metals and mining, chemical, petrochemical, iron and steel, and pulp and paper. Dürr Megtec WESPs can remove up to 98 per cent of particulate in a single stage, depending on the characteristics of the gas stream. Increased removal efficiency is possible with alternative configurations.

Application-oriented development

“After talking to our customers, our product development departments generated innovative, patent pending ideas in the area of particulate removal efficiency, and tube and electrode cleaning – all with a keen eye towards reduced maintenance and increased reliability,” Rodney Schwartz, vice-president sales at Dürr Megtec in De Pere, Wisc., said.

Numerous scale models were used to establish proof of concept before ideas were implemented. Based on that work, extensive field-testing was done under real-life conditions with large, to-scale equipment. Results of the pilot program were used to prove final concepts and performance prior to commercial scale production.

“The next generation design addressed industry-specific feedback obtained from users and operators”, Schwartz added. “We are excited to get this equipment to the market, so that both our customers and the environment can benefit.”

For more information about Dürr Megtec’s advanced WESP, watch the video or visit its website here.