Part 1 Performance characteristics
Plenum pulse bag type collector is a kind of de-dusting equipment with high efficiency. It combines many advantages of collectors including loculose anti-blow ａnd pulse blow, ａnd it has solved the disadvantages of deficiency of kinetic energy strength in loculose anti-blow ａnd pulse blow de-dusting running in the same time, improved the applicability ａnd de-dusting efficiency, extended life span of the bag. There’s no venturi tube in the mouth of bag or blowing tube, that reduces working resistance ａnd makes examining ａnd repairing easy. Electromagnetic pulse valve is of these characters: be sensitive to control, high efficiency, long life span ａnd so on. At present, this type dust collector has been used widely.
Part 2 Basic structure ａnd working principle
1 Structure Main structures of plenum pulse bag type collector are as followers: box body ａnd bag compartment （integrative）, dust store bin, wind inlet ａnd outlet （including screw conveyer ａnd cinder valve）, ladder, baluster, air passage system （including offline pneumatic cylinder, electromagnetic pulse valve, compressed air bag）, de-dusting controller ａnd so on. （1）Box body Box body is mainly used to fix cage, filter bag ａnd air passage components, made into whole close from. Compressed air enters into box body first, ａnd crushes inside of the filter bag while collector is de-dusting. Box body is made into 1.5 degree inclined plane, that can be prevented from seeper when used in the open air. There’s a door where someone can examine ａnd repair on the top, installing ａnd replacing cage, filter bag are all done here, that is very convenient. According to the difference of specification, box body is divided into some compartments separated by armor plate between them ａnd impermeable by air, offline de-dusting will come true. There’s a lift valve in each compartment, which breaks ａnd filtrate smoke current of air. （2）Bag compartment Bag compartment is in the below of the box body, mainly used to contain cage ａnd filter bag ａnd from a filtration space, cleaning of smoke is mostly done here. Like the box body, according to the difference of specification, bag compartment is divided into some compartments separated by armor plate between them ａnd prevented from disturbing, at the same time it forms one sedimentation space. There’s a leaked explosive hole on the wainscot of each compartment, the number of leaked explosive hole is 8. Coal preparation equipment, there’re some coal fines produced in the process of coal preparation, but concentration of coal fine is far less than 65g/m3, so collector must not set leaked explosive holes. Even so, the filter bag should adopt antistatic filter material. You set leaked explosive hole whose area is 0.3m2 according to the structure of wainscot position. Choose the material whose thickness is equal to 1 mm L2-M anneal industrial pure aluminum plank, ａnd the anti-pulls strength of industrial pure aluminum plank is 60Mpa, compared with the anti-pulls strength that is not less than 375Mpa of the carbon structure steel wall plank that the thickness is equal to 4 mm. The leaked explosive hole can ensure that dust collector operates in a safe condition. （3）Dust store bin Dust store bin is below of the bag compartment, used to store collected dust. Dust-laden gas enter into dust store bin first before into bag compartment, that the speed of gas falls ａnd the direction of current. （4）Wind inlet ａnd outlet There are two kinds of wind inlet ａnd outlet according to the structure of the duster. The wind inlet of the 32 series is a cylinder type, ａnd is directly welded on the lateral plate of the dust store bin. The wind outlet is in the bottom, at the side of the bag compartment, connected with inner side of the bag compartment by the plate hole of the lift valve to, other series of wind inlet ａnd outlet are made into to a whole, put on the side of the bag compartment. The bag compartment is separated two parts from the dust store bin by a slant board, with one part as the inlet ａnd the other outlet. Though this structure is of a big volume, the air is evenly distributed, with a good effect, ａnd suitable for occasions where dust-laden gas is of a great concentration.