AIR POLLUTION CONTROL EQUIPMENT - APC
Air pollution is a mixture of solid particles and gases in the air, refers to the release of pollutants into the air that are detrimental to Living being and the planet as a whole. When harmful or excessive quantities of substances are released to atmosphere such as Particulate Matter (PM), SOx, NOx, COx, HC, other Organic & Inorganic substances,
Biological Molecules, radiation particles, etc. causes the effect of air pollution as some mention below It may cause diseases, allergies and even death to humans;
It may cause harm to other living organisms such as animals and food crops, It also causes Smog formation, Climate Change, Ozone layer depletion, Global Warming, etc to the earth
Some types of Our Air Pollution Control (APC) Equipment applied to industrial applications and which utilize one or more of the methods of air pollutant removal or reduction mentioned above include
Dry Scrubbers
It is also referred to as dry adsorption scrubbers, inject dry, neutralizing chemical agents, etc. into the emission stream, causing the gaseous pollutants contained within to undergo a chemical reaction which either neutralizes the pollutants or converts them into innocuous substances. Once the chemical reaction concludes, filters within the scrubber chamber collect and remove the spent agents from the cleaned emission gas The chemical reactions resulting from the addition of neutralizing agents during the dry scrubbing process helps to both reduce the acidity of the emissions and remove air pollutants.
Wet Scrubbers
It is also referred to as wet adsorption scrubbers or wet collectors, employ liquid solutions typically water to collect and remove water-soluble gas and particulate pollutants from industrial emissions. The wet scrubbing process either passes a gas stream through a liquid solution or injects a liquid solution into a gas stream. As the gas stream comes into contact with the liquid, the solution absorbs the pollutant removing it from the stream
Air Filters
Devices used to control air pollution which employ a specific type of filtration media to collect and remove dry particulates and contaminants, such as dust, pollen, microbes, chemicals, etc. from air passing through them. These devices are utilized in residential, commercial, and industrial applications to remove pollutants from exhaust air and improve the air quality within the work environment. For industrial applications, there are several types of air filters available, including fabric filters, and cartridge dust collectors.
Cyclones Dust Collector
Referred to as cyclone dust collectors—are air pollution control devices which, similarly to air filters, separate dry particulate matter from gaseous emissions. However, rather than employing filtration media, cyclones utilize centrifugal force to collect and remove particulates. As gas streams enter a cyclone, they flow along a spiral path within the cylindrical chamber. This swirling motion forces large particulates against the chamber wall, which slows their inertia, causing them to drop into the collection hopper below for further processing and disposal.
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The cleaned gas streams continue upward and out of the cyclone. Typically, additional filtration devices used to control air pollution, such as bag houses, are employed following cyclones in an air pollution control system to remove the smaller particulates not previously separated and collected from the gas stream by the cyclones.
Electrostatic precipitator
Device that removes suspended dust particles from a gas or exhaust by applying a high-voltage electrostatic charge and collecting the particles on charged plates. Dirty flue gas (from the exhaust smokestack) past on two electrodes (electrical terminals), which take the form of metal wires, bars, or plates inside a pipe or smokestack.
Electrostatic smoke precipitators use static electricity to remove the soot from smoke. Dirty air moves past negatively charged wires (shown as −ve) so the soot particles pick up a negative charge. The negatively charged particles of soot then stick to positively charged plates (shown as +ve) further along the pipe. Much cleaner air emerges from the pipe as a result. Most precipitators also have simple fabric filters at each end of the pipe to remove larger soot particles.
Mist collectors
Devices employ fine mesh-like filters to separate liquid droplets from the gas and collect them into a separate chamber for further processing and, potentially, recovery and reuse. Mist collectors maintain high filtration efficiencies for submicron liquid particles, with some models offering 99.9% efficiency for particles ≥0.3 μm in diameter. While mist collectors are capable of processing acidic and corrosive gas streams, they cannot handle gas streams containing large particulates, as they may cause an obstruction within the collector’s filter.
Bio-filters
Air pollution control devices which employ microorganisms, such as bacteria and fungi, to degrade and remove water-soluble compounds. Similarly to incineration devices, bio-filters destroy the pollutants to reduce the amount present in industrial emissions and exhaust. However, the microorganisms in bio-filters absorb and metabolize gaseous pollutants, such as VOCs and organic ,without generating byproducts typically produced from industries.
Paint Booth
Provides a clean and controlled environment for finishing, at the same time removes any paint overspray from the air using exhaust filters. T Function of a paint booth is to contain paint overspray, keeping your employees and the environment safe. In addition to safety, quality can be significantly improved with a paint booth. Enclosed paint booths offer a contaminant-free environment for better quality paint jobs.
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Multiply the booth's face area by 100 feet per minute to achieve CFM. One hundred feet per minute is the guideline for air movement in the booth area. Using the example from above, 80 square feet multiplied by 100 feet per minute equals 8,000 CFM. This is the size of the fan needed.
