The working quality of the internal suction arm 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 surrounding residents, the wear and life of the fan blades, and also involves the recycling of economically valuable materials. Therefore, the dust remover must be designed, selected and used correctly.

The primary investment and operation cost shall be considered when selecting the dust remover, such as dust removal efficiency, pressure loss, reliability, primary investment, floor area, maintenance management and other factors. The dust remover shall be selected according to the physical and chemical properties, characteristics and production process requirements of smoke and dust.

1. According to the requirements of dust removal efficiency

The selected dust remover must meet the requirements of the emission standard. Different dust collectors have different dust removal efficiency. For the dust removal system with unstable operation or large fluctuation, pay attention to the influence of the change of flue gas treatment capacity on the dust removal efficiency. During normal operation, the order of efficiency of the dust remover is: bag type dust remover, electric dust remover and Venturi dust remover, water film cyclone dust remover, cyclone dust remover, inertial dust remover and gravity dust remover.

2. According to the nature of the gas

When selecting the dust remover, factors such as air volume, temperature, composition and humidity of the gas must be considered. Electrostatic precipitator is suitable for flue gas purification with large air volume and temperature400 ℃; The bag type dust remover is suitable for the purification of flue gas with temperature less than 260 ℃, and is not limited by the volume of flue gas. When the temperature is ≥ 260 ℃, the flue gas should be cooled before using the bag type dust remover p=“”

The bag type dust remover is not suitable for the purification of flue gas with high humidity and greasy dirt; Combustible and explosive gas purification (such as gas) is suitable for wet dust collectors; The handling air volume of cyclone dust remover is limited. When the air volume is large, multiple dust removers can be connected in parallel; When it is necessary to remove and purify harmful gases at the same time, spray tower and cyclone water film dust remover can be considered.

3. According to the nature of dust

The properties of dust include specific resistance, particle size, true density, ladling property, hydrophobicity, hydraulic hardness, flammability, explosion, etc. Electrostatic precipitators should not be used for dust with excessive or small specific resistance, and bag type dust collectors are not affected by dust specific resistance.

The concentration and particle size of dust have a significant impact on the efficiency of electrostatic precipitator, but have no significant impact on bag filter; When the dust concentration of the gas is high, a pre dedusting device should be installed in front of the electrostatic precipitator; The type, dust removal method and filtering wind speed of bag filter depend on the nature of dust (particle size and ladling property);

Internal precipitation arm is not suitable for purifying hydrophobic and hydraulic dust: the true density of dust has a significant impact on the gravity dust collector, inertial dust collector and cyclone dust collector; For the newly attached dust, it is easy to cause the dust collector working face to be caked or blocked, so it is not suitable to use dry dust removal; When dust purification meets with water and can produce flammable or explosive mixture, wet dust remover shall not be used.

4. According to pressure loss and energy consumption

The resistance of bag type dust remover is greater than that of electric dust remover, but compared with the overall energy consumption of dust remover, there is little difference between the two.

5. According to equipment investment and operation cost.

6. Water saving and antifreeze requirements

The wet dust collector is not suitable for the areas with insufficient water resources; The problem of freezing in winter exists in northern areas, so wet dust remover shall not be used as much as possible.

7. Requirements for dust and gas recycling

When the internal precipitation arm dust has recycling value, dry dedusting should be adopted; When the dust has a high recovery value, the bag filter should be used; When the purified gas needs to be recycled or the purified air needs to be recycled, the bag filter should be used.

internal suction arm https://www.kaisenfilter.com/Suspended-Suction-Arm