Bag dust collector has stable performance and simple process, especially suitable for collecting fine and dry dust, especially suitable for dusty gas containing blasting risk or with sparks.

Then the following elements should be considered first when choosing bag dust collector:

1, the working environment. Outdoor installation of baghouse dust collector, should consider the corresponding electrical system and the necessary rainproof methods.

Bag filter is located in a corrosive gas or dust environment, should consider the structure of the dust collector material and material coating.

2, working pressure. In general, the requirements of the bag house dust collector pressure strength of about 5000Pa, elected Roots blower for power, the requirements of the bag house dust collector shell pressure degree of 15000 ~ 50000Pa, a few cases, such as blast furnace gas purification, the design pressure requirements to reach 0.3MPa or higher, the equipment is generally designed for the round, the dust collector shell and the wall thickness of the dust container is not less than The thickness of dust collector shell and dust hopper wall is not less than 5mm, the thickness of rib plate is not less than 6mm, the thickness of paired flange is not less than 10mm, all the continuous welds of dust collector should be straight, and no welding defects such as false weld, false weld, etc., the height of weld meets the design requirements, and the paraffin leakage test.

3、Dust characteristics. By the dust of wetness, viscosity, combustion and explosiveness, electrical conductivity, mobility can distinguish between different properties of the dust. For example, according to the wettability of dust is divided into hydrophilic dust with a wetting angle of less than 90 ° and hydrophobic dust with a wetting angle of more than 90 °; according to the viscous force of dust is divided into the non-sticky dust with a pull-off force of less than 60Pa, 60-300Pa micro-sticky dust, 300-600Pa in the sticky dust, more than 600Pa of the sticky dust; according to the dust combustion, explosivity is divided into combustible and explosive dust and general dust; according to the powder Mobility can be divided into angle of repose less than 30 ° mobility of good dust, angle of repose for 30 ° ~ 45 ° mobility of medium dust and angle of repose greater than 45 ° mobility of poor dust. According to the conductivity of dust and electrostatic dust removal is divided into greater than l0ll Ω - cm of high specific resistance dust, l04 ~ l0ll Ω - cm of the specific resistance of dust, less than l04 Ω - cm of low specific resistance dust. Material into dust, the specific surface area increases, improving the activity of the material, with the conditions of combustion, combustible dust oxidation exothermic reaction rate exceeds its ability to dissipate heat, and ultimately converted to combustion, said dust spontaneous combustion. When the concentration of explosive dust reaches the explosion limit and meets the open flame, resulting in a dust explosion. Coal dust, coke dust, aluminium, magnesium and some high sulfur-containing mineral dust are explosive dust.

4, the composition of the gas. When the gas being processed contains flammable, corrosive and toxic gases, the chemical composition of the gas should be mastered.

Combustible gases, such as CO, when it coexists with oxygen, can constitute a blasting mixture. If not within the boundary of the blast, you can directly use the bag dust collector, but should be selected with a high airtight structure, and choose a low resistance of the filter material. If you reach the boundary of the blast should be set before entering the dust collector auxiliary incinerator, to be burned and cooled gas before entering the bag filter.

Corrosive gases, such as sulfur oxide, chlorine and hydrogen chloride, fluorine and hydrogen fluoride, phosphoric acid gas, etc., according to the variety of corrosive gases need to select the filter media, shell materials and disposal methods.

Bag dust collector operating temperature should be considered in accordance with the long-term operating temperature of the equipment, in order to avoid condensation, generally should keep the flue gas temperature of the bag dust collector is higher than the dew point of 15 ~ 20 ℃. For the gas close to the dew point temperature, the relative humidity of the gas should be reduced by indirect heating or mixing with high temperature gas.

Bag dust collector function is good or bad, in addition to the correct selection of filter bag materials, ash cleaning system plays a decisive role in the bag dust collector. For this reason, the ash removal method is one of the characteristics of the difference between the bag filter, but also an important part of the operation of the bag filter.

Bag dust collector generally by the host, filter elements (dust bag) and blowback control and other auxiliary systems. One of the dust bag is a bag dust collector components, its raw materials, sewing, use and maintenance of the whole system is related to the stable operation of the dust removal system, the air volume, dust concentration, load, flue gas temperature and humidity, corrosive and other factors may cause dust bag breakage. In addition to dust bag damage failure in a variety of types, wear and tear is a common type, and with the dust collector design, manufacture and use of closely related.

Bag dust collector filter bag is a bag filter components, and the manufacture of filter bags of filter bag raw materials directly determines the functional parameters of the bag filter, such as dust removal equipment specifications, power, emission concentration, resistance, service life and other indicators. Therefore, in the design and use of bag filter consider the characteristics of the dust gas (such as dust concentration, temperature, humidity, acidity and alkalinity) and the characteristics of the dust (such as particle size, viscosity, abrasive), etc., correctly and appropriately select the filter bag, in order to achieve the satisfaction of the dust removal equipment needs.

Bag dust collector is the dust removal equipment to remove the dust pollutants in the waste gas. Its emission concentration can generally reach a stable 50mg/m³ below, and even can reach 5mg/m³. In today's increasingly high requirements for sustainable development, bag house dust collector has the advantages of other dust removal methods are difficult to reach.

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