Scrubbers ( Dry / Wet )
A scrubber tank, often referred to as a "scrubber vessel" or simply a "scrubber," is a piece of equipment used in various industries to remove pollutants, contaminants, or unwanted substances from gas streams or exhaust gases. The primary purpose of a scrubber tank is to clean or purify the gas by physically or chemically interacting with the contaminants, effectively reducing their concentration before the gas is released into the environment.
Scrubber tanks can come in various designs and configurations based on the specific application and the type of pollutants being targeted. Some common types of scrubbers include:
Wet Scrubbers
Wet scrubbers use a liquid (often water) to capture and remove pollutants from the gas stream. The gas is passed through the liquid, and the pollutants are absorbed or dissolved into the liquid. Wet scrubbers are effective for removing particles , gases, and odorous compounds.
This type of wet scrubber uses the velocity difference between the gas and the liquid to create a pressure drop that facilitates the capture of pollutants
In this design, the gas passes through a bed of packing material that is wetted with liquid. Contaminants are absorbed onto the wet surfaces of the packing.
Dry Scrubbers
Dry scrubbers use a solid sorbent or a reactive chemical to remove pollutants from the gas stream.
These scrubbers are often used when the gas stream has high temperatures or is unsuitable for direct contact with water.
Dry sorbent are injected into the gas stream, and the pollutants are chemically adsorbed onto the sorbent particles
This design involves spraying a fine mist of alkaline solution into the gas stream to neutralize acidic gases.
Gas Scrubbers
Gas scrubbers are used to remove specific gases, such as sulphur dioxide (SO2), hydrogen sulphide (H2S), ammonia (NH3), and other noxious gases. They typically involve chemical reactions that convert the harmful gases into less harmful compounds.
Scrubber tanks are commonly used in various industries, including:
Scrubbers are used to control emissions from manufacturing processes, chemical production, metal refining, and more
In coal-fired power plants, scrubbers are used to remove sulphur dioxide, a major contributor to acid rain, from flue gases.
Scrubbers help reduce pollutants and particulate matter from waste incineration processes
Scrubbers are used to remove hydrogen sulphide and other sulphur compounds from natural gas streams.
Scrubbers can be used to neutralize or capture harmful gases produced during chemical reactions