Selection of Dust Collection for Air Cleaning
Canadian Air Systems Co. is a well known designer and manufacturer of industrial dust collection systems. Dust collecting equipment is available in many designs using a number of principles and featuring wide variation in effectiveness, initial cost, operation and maintenance costs, space, facilities and construction materials.
Factors influencing dust collection equipment selection include:
* Concentration and particle size of contaminant.
In most systems of transport of dust, dust usual range of 0.1 to 100 microns – a fairly wide range of particle sizes.
* Degree of collection.
The evaluation will consider the need for efficient high cost of equipment such as electrostatic precipirators; high-efficiency equipment moderate economic, 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 a health hazard, public nuisance or the ability to damage – and the regulatory requirements or local air pollution.
* Characteristics of air or gas.
of high temperature gas streams exceeding 180 F will prevent the use of media in standard sensors cotton fabric, the presence of steam or condensation of water vapor will cause packling and clogging the air packs dust cloth and dry centrifugal collectors. The chemical composition can attack fabric or metal collectors in dry and cause extremely corrosive conditions when mixed with water in the wet-type sensors.
* Characteristics of contaminant.
The chemical composition can cause attack on dust collector elements or corrosion in the wet dust collector type. sticky materials such as dust impregnated polishing metal polishing compounds can adhere to collector elements connecting passages dust collector. Linty materials such as dust Textile Opens, picker and napper stick to certain types of sensor surfaces or elements. Abrasive many materials in moderate to heavy concentrations such as sanding dust can cause rapid wear particularly on dry type centrifugal collectors. particle size and shape will exclude some models collectors. The shape of particles parashute such as bees wings “from grain float through centrifugal collectors due to their rate of fall being slower than much smaller spherical particles with the same specific gravity. the nature of many finely divided combustible materials will influence the selection of collectors for dust explosion for such products.
* Methods of disposal.
Methods of removal and disposal of materials collected vary with the equipment, processing plant, the amount involved and the design collection. Dry collectors can be discharged continuously or in batches through dump gates net valves 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 flight conveyors or draining as a slurry. Material characteristics can influence other problems, such as packaging and reduction of dry materials in dust hoppers, floating mud forming the sensor characteristics, wet, etc.
Depenging on the above factors, the following types of Canadian Air cleaning systems are used:
- The electrostatic precipitators
Collectors Fabrics –
- Collectors Intermittent-Duty Fabric
- Sections multiple, continuous, collectors automatic fabric
- Collectors tissue retro-Jet
Collectors – Reduce reverse flow continuous
- Wet Collectors
- Tour of the House or Spray
- Packed Towers
- Wet Centrifugal Collector
- Wet Precipitators dynamic
- Port type collectors
- Venturi Scrubbers
- Dust Cyclone Collectros
- High efficiency centrifugal collectors
- Dry Type Dynamic Precipitators
- Louver type dust collectors
- Settling Chambers
- Collectors drinking Unit
For more information please refer to .
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Process Engineer
Canadian Air Systems
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