Part.X PW – Wet Electrostatic Precipitator (WESP): Reducing the impact of industrial gases on the environment

Wet Electrostatic Precipitator
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Emissions of NOx, VOCs/HAPs, acid gasses, particulate control and acid mists are controlled through environmental technologies delivered by Dürr Air Pollution Control System.

To help ensure environmental compliance, a complete engineered systems approach is needed, including wet scrubbers, wet or dry electrostatic precipitators, purification by distillation systems, venturi scrubbers, distillation equipment, and oxidizers. Environmental technologies brought to India by Dürr are at the forefront of managing NOx, VOCs, acid mists, particulates, mercury, odors, and other emissions.

DürrMegtecPart.X PW wet electrostatic precipitators are used efficaciously to clean industrial gases of fine particulate matter, aerosols and acid mists in India. This goes a long way in helping meet environmental regulations and safeguarding downstream equipment.

The core features of Part.X PW systems comprise reliable operation, maximum removal efficiencies,low operating costs,and significantly lessening the need for maintenance.

DürrMegtecPart.X PW WESP Benefits

  • Standardized modules significantly lower installation time and assistin optimizing shipment
  • Can attain contaminant removal efficiencies of up to 99.9%
  • Self-cleaning robust design lowers maintenance requirements, ideal where the process flow contains tars
  • Can be merged with a gas quencher, gas scrubber or thermal oxidizer, as needed, for multi-pollutant emissions control
  • Corrosion-resistant alloys are used when acids are present in the process flow
  • Optimized emitting and collecting electrode design support higher operating voltages and optimum corona generation, leading to higher efficiency contaminant capture
  • Improved high-intensity offline cleaning system reduces maintenance, eliminates carryover of entrained matter during washing and provides better operational performance during cleaning. Improved cleaning also means a depletion in chemical consumption.
  • Improved performance ensures increased protection of downstream equipment, such as thermal oxidizers, resulting in more efficient RTO performance and longer RTO media life.

DürrMegtecPart.X PW WESP Operating Principle

To remove large particulate, the process discharge gas to be treated is directed to a committed quencher or scrubber to be saturated to the adiabatic dew point. Then the gas flows into the bottom of the wet electrostatic precipitator (WESP). A gas flow distributor resides in the inlet plenum for optimal gas flow distribution across the collecting tubes. Discharge electrodes are mounted on a high voltage frame to electrically charge the incoming contaminants (solids, condensable matter, acid mists, and/or aerosols) for collection on the collecting tubes. Post that, the cleaned gas is released through the WESP system.

A washing system sprays water (with chemicals required for certain applications) to wash the WESP interior for optimal collection efficiency.

Multiple WESP modules are used for larger gas volumes to lessen the impact of cleaning cycles o

n emissions levels. Due to higher energy intensities and optimized discharge electrode design, WESP systems manufactured by DürrMegtec provide a higher collection efficiency than conventional WESPs.

Part.X PW WESP Application Areas

DürrMegtecPart.X PW WESP air pollution control systems are the perfect solution for nearly all industry sectors, including mineral processing, pulp and paper, petrochemical, iron and steel, and non-ferrous metallurgical, wood panel, waste incineration, and bioenergy.

The areas where they are implemented are:

  • Boilers
  • Calcining
  • Ceramics/catalyst
  • Electrode production
  • Food processing
  • Foundries
  • Petrochemical FCCU
  • Smelters
  • Sulfuric acid plants
  • Waste incinerators
  • Wood dryers

Part.X PW Technical Specifications

DürrMegtec wet electrostatic precipitators are a particularly befitting and cost-effective solution for removing:

  • Particulate matter (“dust”), specifically fine, submicron material including heavy metal fumes
  • Condensed volatile compounds, including tars
  • Acid mists, including hydrochloric acid mists and sulfuric.
  • Aerosols, including water droplets in odorous gas streams

Depending on the characteristics of the gas stream DürrMegtecPart.X PWs WESPs air pollution control systems in India can remove up to 98% of particulate in a single stage. With additional modules in series, more removal of up to 99.9% is possible.

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