Dust removal system-asphalt mixing plant

Dust removal system-asphalt mixing plant

Dust removal system is of the drying drum fire in devices and other dust collection process of gas emissions in line with the requirements of environmental protection. It consists of a class flue, second-level, first-level gravity dust collector bag, secondary fan and flue components. Large particle size of dust collected by gravity separation of dust, fine dust filter bag dust filter. For the convenience of transportation and installation, and compact, the first-level gravity filter and second-stage bag dust collector made Shi Ji as a whole.

Dust removal system to run under negative pressure environments, by adjusting the air damper opening degree of induced draft fan control pressure and air flow. Gravity filter coarse dust collected through gravity-discharge valve discharge by screw conveyor to the hot stone elevator. Bag collects fine dust by screw feeder to recycle elevator. Lifting, vibration, measuring and mixing process flue dust through the exhaust pipe into the level. Bag filter purification air emissions to the atmosphere from the chimney.

1, gravity filter

If the dust concentration is high, export concentration is also high. With the improvement of efficiency, export concentration will be lower, but efficiency has its limits. Exceeds a certain value, it is difficult to improve. In order to reduce the export concentration, concentration should be to minimize the entry of dust. Gravity filter front end is drying drum, should therefore be based on the actual operating conditions to minimize the drying drum in the dust.

Actual production should not exceed the design capacity, this ensures that dust discharge concentration, but also can extend the life of the exhaust pipe and screw feeder.

2, bag filter

Principle of baghouse by air jet cleaning bag, so the dust Remover must be working in a vacuum environment. Dust concentration in the entry of the gas into the bag, bag filters, dust adhesion on the bag, purified air is released into the atmosphere through induced draft fan.

Periodic internal blow bag dust filter into the air to clear the dust bag attachment. All the bags into a compartment, and each compartment is completely sealed to each other. Clean one compartment at a time, so dust bag dust filter and clean at the same time. Collecting dust in the discharge impeller of screw feeder and feeder. In using bag dust collector, spiral feeding machine and blade material confidential will always be in working condition, to avoid the accumulation of dust on the bottom.

3, reverse air blowing

Divide bag into bag compartment. During the cleaning phase, which because of the existence of negative pressure forces the air from the bag entrance exit and will bag up, make the deposited dust from falling into the hopper of the outer surface. Located in the base of the hopper screw conveyors are dust emissions to the outside.