Wet scrubbers remove pollutants from gas streams using a scrubbing liquid. They can spray the solution into the gas or force gas through a pool of fluid. Wet scrubbers can handle any contaminant and operate in any environment, but require maintenance due to corrosion.
Wet scrubbers are a class of devices used to remove various types of pollutants from gas streams in a furnace, flue or other device. Manufacturing plants and facilities that process propane and other types of natural gas often make use of these devices. Most wet scrubber designs handle this process using a solution known as a scrubbing liquid. The gas is moved through the liquid in some way, with the gas emerging from the process without the contaminants and pollutants that were present before passing through the scrubber.
Depending on the design of the wet scrubber, this process of removing contaminants from the gas can be handled in a couple of different ways. One of the most common approaches is to spray the cleaning solution into the gas. The solution attracts the heavier pollutants, causing them to detach from the gas and adhere to the liquid. As the gas passes through the stream, contaminants are left behind.
Another approach calls for a wet scrubber design that forces gas through a pool of scrubbing fluid. As in the spray approach, contaminants are collected and bound by the fluid as the gas passes through the filtering action of the pool. The result is a gas free from dust particles and other contaminants that could interfere with efficient use of the gas.
In general, wet gas scrubbers include some components that are found with any design. The typical scrubber includes ducts and some sort of ventilation system that helps force the gas through the chambers. There is also some type of pump, as well as a collection area for the scrubbing liquid which was used to scrub the gas. The pool design will also have a saturation chamber, while both base designs will have some type of scavenging system that removes the contaminated liquid from the gas itself.
There are several benefits associated with using a wet scrubber. The devices can handle a wide range of temperatures and humidity content, making them ideal for operation in nearly any environment. Any type of contaminant can be removed, assuming the device configuration is correct. This includes corrosive gases that are mixed with the gas requiring decontamination.
While there are many benefits to using wet scrubbers, the devices require maintenance to continue operating efficiently. Corrosion is a constant problem due to the range of contaminants that are removed and the high humidity that is sometimes generated in the various scrubber chambers. However, with routine maintenance and care, a wet scrubber can be used repeatedly for a number of years before needing to be replaced.
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