Composite Air
Air Purifiers by the wet dust collection
Oleg Systems Co. offer all kinds of industrial dust collection systems, including including air scrubber wet collectors. dust collection equipment using the principle of wet dust collection is available in many patterns using a number of principles and featuring wide variation in effectiveness, initial cost, operation and maintenance costs, space, facilities and construction materials.
wet scrubbers have the ability to handle high temperature and moisture-laden gases. The collection of dust in wet form eliminates a secondary dust problem in disposal of materials collected. In addition, some are dust explosion or fire during the dry and wet collectors eliminate or at least reduce the Hazzard. However, the use of water may introduce corrosive conditions within the collector and protection against freezing may be necessary if precipitators wetlands are located in cold climates. Space requirements are nominal, the pressure loss and collection efficiency varies considerably design.
Wet collectors (particularly the high energy – high efficiency types) are used more often as the solution of problems air pollution. Note that the disposal of material collected in the water without further qualification or treatment may create problems pollution of water.
Wet collectors have a distinct characteristic not found in other collectors – their inherent ability moisture. Humidification The process of adding water vapor in the air stream by evaporation, can be either beneficial or not depending on the situation. When the initial air flow at a high temperature that is not saturated, the evaporation process reduces the temperature and volume of the gas flow from the collector. Asuming the fan should be selected to operate in rear or side air quality of the collector, it can be smaller and arguably require less power than if there had been no cooling in the collector. This operating system a clear advantge of humidification.
Oleg Systems Co. offers the following types of dust Wet collectors:
TOUR OF HOUSE OR SPRAY
Consists of a round or rectangular chamber in which water is introduced by spray nozzles. There are many variations in design, but the main mechanism is impaction of dust particles on the liquid droplets formed through nozzles. These droplets are separated from the airflow by centrifugal force or impingement on the water eliminators.
PACKED TOURS
Collectors of this group are essentially contact beds through which gases and liquid flow is at the same time, simultaneously cons- or cons-stream and are mainly used for applications involving gas, steam and mist elimination.
Collectors wet CENTRIFUGAL
Damp dust collectros use centrifugal force centrifugal acceslerate dust particles and impigne on a wet collector. These sensors are more effective than the type of room. Some are availbale with the number of sections of collision.
DYNAMIC precipitated
This type uses water jets in a fan housing and received precipitation of dust particles on the wet surface of a wheel with the special form the fan blades. No internal pressure drop is because even if the mechanical efficiency is somewhat lower than the mechanical efficiency of fans exhaust standard.
Type collectors HOLE
In this group of models wet collection, air flow through the collector is brought into contact with a sheet of water in a narrow passage. water flow can be induced by the velocity of air flow or maintained by pumps and dams.
VENTURI SCRUBBERS
This collector uses a building shaped venturi throat to establish speed much higher than those encountered with the orifice type. The collection mechanism is impaction of the Venturi. As with wet collectors in general, the efficiency collection venturi increases with higher pressure drops. pressure drops are obtained by different design speeds for selected gas in the throat. The venturi is iteself conditioner gas causing intimate contact between the particles in the gas stream and multiple streams of water washing.
Factors influencing dust collection equipment selection include:
* Concentration and particle size of contaminant.
In most systems of transport of dust, dust usual range 0.1 to 100 microns – a fairly wide range of particle sizes.
* Degree of collection.
The evaluation will examine the need for highly efficient equipment expensive, precipirators as electrostatic-efficient equipment expensive moderates such as fabric or wet collector units, and lower cost of primary units such as dry centrifugal group. Degree of dust required may depend on the location of facilities; compariosn quantities of materials disposed in channels with different types of dust collectors, type of contaminant – its salvage value or its potential as health hazard, public nuisance or damage to capacity – and local regulatory requirements and pollution air.
* Characteristics of air or gas flow.
gas at high temperature above 180 F flow will prevent the use of media in standard sensors cotton fabric; presence of steam or condensation of water vapor and causes packling clogging of the air or dust packages in fabric dry centrifugal collectors. The chemical composition can attack fabric or metal collectors in dry and cause extremely corrosive conditions when mixed with water in wet-type sensors.
* Features contaminant.
Chemical composition can cause a crisis on dust collector elements or corrosion in the dust collectors Humid. sticky materials such as dust impregnated polishing metal polishing compounds can adhere to the sensor elements connected passages dust collector. Linty materials such as dust Textile Opens, picker and napper stick to certain types of surface sensors or components. Abrasive materials, many moderate to heavy concentrations such as sanding dust can cause rapid wear particularly on dryland centrifugal collectors. particle size and shape will exclude some models collectors. The parashute form of particles such as the wings of bees "grain" float through centrifugal collectors due to their speed of fall being slower than much smaller spherical particles of the same specific gravity. the nature of many finely divided combustible materials will influence the selection of collectors for dust explosion for such products.
* The methods of disposal.
Methods of removal and disposal of materials collected vary with the material, treatment plant, the amount involved and the design collection. Dry sensors can be discharged continuously or in batches through dump gates valves net and rotary locks to conveyors or containers. Wet collectors can be arranged for the removal of the batch or continuous ejection of material dehydrated by flying conveyors or draining as a slurry. Material characteristics can influence other problems, such as packaging and reduction of dry materials in dust hoppers, floating of slurry characteristics in wet forming sensors, etc.
For information please refer to http://www.olegsystems.com/industrialventilation/Index.html .
Oleg Chetchel
Systems Engineer Industrial air transfer
Oleg Systems Co.
http://www.olegsystems.com/contact/Index.html
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About the Author
Oleg Chetchel
Ventilation Equipment Designer
Tenderall Fan Co.
http://tenderall.com
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