The work or bad of the Dust Collector not only directly affects the reliable operation of the dust removal system, but also relates to the normal operation of the production system, the environmental sanitation of the workshop and the surrounding residents, the wear and life of the blade of the fan, and also involves the recovery and utilization of the material with economic value. Therefore, we must correctly design, select and use dust remover. When selecting the dust collector, the investment and operation cost must be considered, such as the dust removal efficiency, the pressure loss, the reliability, the first investment, the floor area, the maintenance management and so on. According to the physical and chemical properties and the characteristics of the dust and the requirements of the production process, the dust remover is selected.
1. according to the requirements of the efficiency of dust removal
The selected dust catcher must meet the discharge standard requirements.
Different dust remover has different dedusting efficiency. For the dedusting system with unstable or fluctuating operating conditions, we should pay attention to the influence of the change of flue gas treatment volume on the efficiency of dust removal. In normal operation, the sorting of the efficiency of the dust collector is: Bag Filter, Electrostatic Precipitator and Venturi dust remover, water film Cyclone Dust Collector, cyclone dust collector, inertial duster, gravity dust collector
2. according to the properties of gas
When choosing the dust collector, the air volume, temperature, composition and humidity must be taken into consideration. The electrostatic precipitator is suitable for the flue gas purification with large air volume and temperature <400 C. The bag type dust collector is suitable for the flue gas purification at <260 C and is not limited by the size of the flue gas. When the temperature is above 260 degrees C, the flue gas should be cooled and cooled in the rear of the bag type dust collector; the bag type dust collector should not be used to clean up the high humidity and oil containing gas; The flammable gas purification (such as gas) is suitable for the Wet Dust Collector; the cyclone dust collector has limited air handling capacity. When the air volume is large, a number of deduster can be used in parallel. When the dedusting and purifying harmful gases are needed, the spray tower and the cyclone water film dust collector can be considered. < p= '> >
3. according to the properties of dust
Dust properties include specific resistance, particle size, true density, ladle, hydrophobicity and water hardness, flammability and explosion. An electrostatic precipitator is not suitable for the dust with too large specific resistance or too small dust. The dust concentration and particle size have significant influence on the efficiency of the electrostatic precipitator, but the effect on the bag type dust collector is not significant; the preduster should be set in the electrostatic precipitator when the concentration of the dust is high. The type, method and wind speed of the bag filter depend on the properties of the dust (particle size and ladle), and the wet dust collector is not suitable for purifying the hydrophobic and hydraulic dust: the true density of the dust has significant influence on the gravity dust collector, the inertial duster and the cyclone dust collector, and it is easy to lead to the new attached dust. Dry dust removal is not suitable for the dust collector working face, so it is not suitable for dry dust removal. When the dust is cleaned, the mixture of flammable or explosive danger can not be used.
4. according to pressure loss and energy consumption
The resistance of bag filter is larger than that of electrostatic precipitator, but there is little difference between the energy consumption of the duster and the total energy consumption of the duster.
5. based on equipment investment and operating costs
6. requirements for water saving and antifreeze
It is not suitable to use wet dust catcher in areas where water is scarce. There is a problem of freezing in winter in the northern part of China.
7. requirements for the recovery and utilization of dust and gas
When the dust has the value of recovery, dry dust removal should be adopted. When the dust has a high recovery value, the bag type dust collector should be used. When the air after the purification needs recycling and purification, the high efficiency bag type dust collector should be used.
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