Rieco Industries Limited

Scrubber are an efficient type of air pollution control equipment used to remove particulate matter, fume and gases (especially acid gases) from industrial processes. Scrubbing can be done either by wet or dry mechanism which then categorise the equipments into dry and wet scrubbers. Wet scrubbers are pollution control equipment that use water or other liquid solutions to scrub particulate matter and harmful gases from the gas stream. However, the dry scrubbers are that in which a dry reagent or slurry is injected into the dirty exhaust stream of gases to neutralise or eliminate gaseous components.

Wet scrubbers eliminate particulate matter from exhaust gas streams by capturing the particles in fine liquid mist droplets or in layers of scrubbing liquid and then separating the liquid droplets from the gas stream.

There are various process variables which affect the performance of particle removal or performance of the scrubber, being, particle size distribution, size of liquid mist droplets, and the relative velocity of the particles and the liquid mist droplets. The most important parameter is the particle size of the inlet dust content. The larger particles are easier to collect as compared to the finer ones. The key factor for effective particle removal in a wet scrubber is, to create a mist of tiny liquid droplets which acts as collection surfaces. Higher scrubbing efficiency for finer particles can be expected when scrubbing liquid is with the finer mist droplets and more densely available.

Efficiency of scrubber depends upon the following major parameters:

• Formation of mist of tiny droplets
• Higher resistance production by creation of suitable pressure drop
• Selection of suitable scrubbing liquid for gaseous pollutants
• Higher relative velocities between dust particles & liquid droplets
• Uniform mixing between gas molecules and liquid phase
• Treatment and reaction time between liquid droplets and gas molecule
• Selection of appropriate liquid to gas ratio

• The configuration of wet scrubbers or some other air pollution control system is determined by the manufacturing process conditions and the type of air pollutants involved. The properties of the inlet gas and dust are of the utmost importance. Scrubbers may be engineered to collect particulate matter as well as gaseous emissions. Wet scrubbers' flexibility allows them to be installed in a variety of configurations, all of which are engineered to have good contact between the liquid and dirty gas stream.

• High dust collection efficiency
• Simple and trouble-free design

• Control of Ambient air quality as per standards – Fugitive emissions at the stack outlet – Work zone emissions – Gaseous emissions
• Product Collection Systems – Part of production process – Recovery of valuable product

• Acid Mist
• Furnaces
• Autoclaves
• Gas absorption
• Building product mfg
• Incinators
• Blow tanks
• Kilns
• Boilers
• Lime hydrators/slakers
• Conveyors and transfer points
• Odor Control/removal
• Cupolas
• Crushers and screens
• Palletizing dissolving tank
• Vents rendering
• Dryers
• Sand systems/strong
• Fumes/VOC smelters