Category: Articles

Wet air scrubbing is often overlooked as a method of air pollution control. The wet air scrubbing technology is not at the forefront of the engineers’ list of equipment for emission control due to the reluctance to change from the well known dry dust collectors. Despite the hesitance, wet air scrubbers are successfully installed downstream...

Treatment quality of an air scrubber refers to the general percentage of a pollutant that the scrubber is able to remove. In other words, this measure shows how effective the scrubber performs. The treatment quality of a scrubber is often measured interference to particle and gas pollutants, as some air scrubbers may be far less...

Sulfuric acid vapour is one of the main pollutants that occur during zinc production. Sulfuric acid vapours are, in fact, not vapours, but a fine mist or aerosol in a working atmosphere; that can be explained by its low vapour pressure and hygroscopic properties. The mist mainly originates from the electrolyte that consists of a...

Heavy iron ore dust is a result of iron ore mining. The iron ore contains high quantities of hematite or magnetite, but also other elements that are often present in trace amounts. Such elements include silicon, phosphorus, aluminum, and sulfur. The iron ore itself is not harmful, however, the dust that is produced during transportation...

Cyclonic wet air scrubber, or cyclone scrubber, is a wet air scrubber that uses both dry cyclone and spray chamber technologies for pollution control. The main scrubbing principle consists of two phases: the inlet gas enters the chamber and swirls through the chamber in a corkscrew motion; while the polluted gas swirls, cleaning liquid is...

A baghouse is an air pollution control device that uses long cylindrical felt tubes as a filler medium. The polluted air enters the baghouse through hoppers; inside the scrubber the gases move through fabric tubes that collect dust and particulate matter on their surface. Once a layer of dust has built up on the tubes...

Electroplating is a process of a thin metal coating formation on a prepared metal surface through the use of electric current. The process involves cleaning and pretreatment of a metal surface with strong acids and surface-stripping agents, like caustic soda and chlorinated hydrocarbons. The process also involves other harmful and toxic substances, e.g. cyanides. Consequently,...

Accumulation of unwanted materials — clogging and fouling — is detrimental to the working function of a scrubber: it disrupts its working cycle, leads to complications and more frequent maintenance. The clogging of an air scrubber occurs due to the high particulate matter (PM) concentrations in the gas that is being treated. Over time PM...

Venturi scrubber is a type of wet air scrubber, which means that it uses water or other liquid to scrub air. It is designed to use the energy of an incoming gas stream in order to atomize scrubbing liquid. Venturi wet scrubbers are the most popular type of scrubbers; they have been used in the...

The so-called packed bed, that is often used in air scrubbers, is a hollow tube or pipe filled with a specifically designed packing material. Packed beds are used to improve contact between different stages of a chemical reaction or another process that is similar in nature, for example, distillation processes or air scrubbing. The purpose...