Aliağa Bakır Sülfat A.Ş.

Wet Electrostatics Filter

Frederic Cottrell developed first Wet Electrostatics Filter (WESP) in 1907 in order to check sulphuric acid mist which was originated from a copper melting process in Pinole, California. Since then, WESP technology has been used to remove dry insulator ESP, submicrons, condensed steams and acid mist in a good way in the industrial and auxiliary applications in the world. Wet washer cannot catch submicrons under 0,3 due to its small dimension.


A WESP can be configurated with flat plate collection electrodes which conducts horizontal gas flow that resembles dry ESP. Alternatively; a WESP can be constituted in a configuration having an updraft pipe shape on the wet washer so as to minimize its waste.

WESP Configuration

Collection tubes can be round, square, rectangle or hexagonal. Our firm offers both plate and pipe shaped WESP designs.


Our firm can supply WESP which is completely mounted to the chimney and ready for installation on the modules shipped to the worksite. For bigger installations, it may offer modules more than one and worksite installation depending on the plan and the worksite costs.


WESP filtration efficiency depend several parameters such as gas speed, collection surface area, corona strength and electrical sectioning. Zen Elektro Filtre (Zen Electro Filter) can enable higher hoisting capacity more than 90% on submicrons and acid moist. We have the power and the quality of designing a wet ESP in a reasonable cost that can increase purifying duration while minimizing the dimension and can meet required emission guarantees.


Typically, a WESP is mounted after ETİ MADEN (ETI MINING) wet chimney gas sulphuric acid system or after a wet washer in a industrial application where chimney/ process gas is cooled till the moisture saturate. After cooling process, gaseous contaminators condensate in order to create submicron aerosols that can be washed within WESP.


A Wet Electrostatics Filter (WESP) runs at the same three phase operation like a dry ESP:
1. Charging particle with negative ions from corona formation which comes by being used a high voltage system.
2. Collection of negative loaded particle on the positive loaded collection electrode surface.
The most fundamental difference with Wet ESP:
3. Cleansing of the collected particles through water sprays on the collection electrode surface, watering or condensation or breakage or the condensation against sonic horns.

Technology Features

• Performance- Typical over 90% and possible until 99%.
• Compact Dimension- minimizes place and cost.
• Cleaning- may be reduced under 10%.
• Reliability- Rooted technology at hundreds of application.
• Fuel flexibility- permits to use some fuels in order to reduce fuel costs.
• Multi Contaminator Control- submicrons particles, they can condense and sulphuric acid mist.
• Modular Design- Enables scaling for air circulation at any kind of dimension.
• Maintenance- there isn’t any mechanic part; continuously self- cleaning.
• Depression- Lower than 1 bar typically from WESP.

Material of Construction

Due to the saturated conditions of the operation, WESPs are sensitive against corrosion. Appropriate selection of the material of construction depends on the analyses of the expected Ph and the chloride levels in the water. Material of construction can change till top- end alloys such as carbon steel, stainless steel, Uranus B6 and lead. Each industry and facility field are unique. Zen Elektro Filtre is keeping on its R&D activities every time for an appropriate material of construction which provides longevity, corrosion resistance and reliability.

(Photo that was taken during repair and maintenance)

(Photo that was taken during repair and maintenance)