Wet Scrubbers

Wet Scrubber Air Pollution Control System Manufacturer in Pune, India

Industrial Wet Scrubbers are pollution control systems that utilize water and/or chemical reagents to remove particulate matter, harmful gaseous emissions and odours from exhaust gas streams. In wet scrubbing processes, gaseous emissions or solid particles are removed from a gas stream by transferring them to a liquid slurry. That liquid is usually water; however, if gaseous pollutants are also to be removed, an aqueous solution that contains chemicals/reagents selected to react with the gases to be removed.

Main advantages of industrial scrubbers used to treat exhaust gas streams include :

Low-risk processing of explosive gases.
High-temperature, high-humidity gas streams can be handled without temperature limits or condensation.
Less footprint area as compared to other available solutions.
Gaseous emissions and solid particulate matter can be eliminated in the single equipment.

How Wet Scrubbers work?

Water is the most common solution used to remove contaminants in the gas stream. In the most basic form of the wet scrubbers, water is used as scrubbing medium. Water is sprayed within the scrubber, gas stream is passed through the water, the water then absorbs the contaminants, and clean gas exits the scrubber. Mist eliminators are installed to remove the residual moisture in the gases. Other scrubbing reagents can be used as absorbing solutions to effectively remove a wide variety of pollutants. A caustic solution (sodium hydroxide, NaOH) is the most common scrubbing liquid used for acid-gas control (e.g., H2S, HCL, SO2).

The mechanism of particulate collection and removal by a scrubber can be described as a four-step process; 1) transport, 2) collision, 3) adhesion, and 4) precipitation. The physical principles involved in the operation of scrubbers are: (1) impingement, (2) interception, (3) diffusion, and (4) condensation.

Wet scrubbers are mainly categorised into 3 different types :

Low Energy.
Medium Energy.
High Energy.

Here energy is referred to the power input required to scrub and get the desired results from the scrubber. Removal of very fine dust particles and high concentrations of gaseous emissions requires high energy scrubber. The simpler types of scrubber with low-energy inputs are effective in collecting particles above 5–10 μm in diameter, whereas the more efficient, high-energy-input scrubbers will perform efficiently for collection of particles as small as 1–2 μm in diameter.

Stratgem offers suitable type of wet scrubbers by thoroughly analysing your application needs. Some of the types we generally offer are ventury scrubbers, packed bed scrubbers, spray towers and centrifugal scrubbers.