advantages of central dust collection system refers to the method of blowing compressed air to remove the dust attached to the filter medium (cloth bag or filter cartridge); According to the advantages of the size of central dust collection system, there may be several groups of pulse valves, which are controlled by the pulse controller or PLC. Each time, a group of pulse valves is opened to remove the dust of the part of the bag or filter cartridge controlled by it, while the other bags or filter cartridges work normally. After a period of time, the next set of pulse valves is opened, and the next part of the dust collector is cleaned by the ash bucket, the upper box, the middle box, the lower box and other parts, and the upper, middle and lower box are divided into chambers. When working, the dust-containing gas enters the ash hopper from the inlet air duct, the coarse dust particles directly fall into the bottom of the ash hopper, the fine dust particles enter the middle and lower box with the airflow turning point, the dust accumulation is attached to the outer surface of the filter bag, the filtered gas enters the upper box to the clean gas collection tube - exhaust air duct, and is discharged to the atmosphere by the exhaust fan. The cleaning process is to first cut off the air duct of the clean air inlet and outlet of the chamber, so that the cloth bag of the chamber is in a state of no air flow through (the air is stopped in the chamber to clean the ash). Then the pulse valve is opened and the compressed air is used to pulse the ash cleaning. The closing time of the cutting valve is enough to settle the dust removed from the filter bag to the ash hopper after the injection, so as to avoid the phenomenon that the dust is separated from the surface of the filter bag and then attached to the surface of the adjacent filter bag with the air flow, so that the filter bag is cleaned, and the exhaust valve, pulse valve and ash unloading valve are automatically controlled by the programmable controller. The dust-containing gas enters through the air inlet, and when it passes through the ash hopper, part of the large particle dust in the gas is separated by the inertial force and gravity, and falls directly into the bottom of the ash hopper. The dust-containing gas enters the filter bag filter area of the middle box after passing through the ash hopper. The gas passes through the filter bag, and the dust is blocked on the outer surface of the filter bag. The purified gas enters the upper box through the filter bag mouth and then is discharged by the outlet.
Below, introduce the advantages of central dust collection system maintenance work:
First, the use of separate chamber air pulse jet ash cleaning technology to overcome the advantages of central dust collection system and the shortcomings of separate chamber reverse blowing dust collector, dust removal, low emission concentration, small air leakage rate, less energy consumption, less steel consumption, less footprint, stable operation, good economic benefits. Suitable for metallurgy, building materials, cement, machinery, chemical, electric power, light industry dust gas purification and material recovery.
2. The upper part of the bag is pumped. After the skeleton is extracted during bag changing, the dirty bag is put into the ash bucket at the lower part of the box and taken out by the manhole.
Three, the inlet and outlet air duct layout is compact, the airflow resistance is small.
Fourth, due to the use of separate chamber wind pulse jet cleaning, the purpose of cleaning can be achieved once, so the cleaning cycle is extended, the energy consumption of cleaning is reduced, and the pressure air consumption can be greatly reduced. At the same time, the fatigue degree of the filter bag and pulse valve is also reduced, thereby doubling the life of the filter bag and valve disc.
Five, the box adopts air tightness design, good sealing, excellent sealing materials for inspection doors, leak detection with kerosene during the production process, and the air leakage rate is very low.
Sixth, the maintenance and bag change can be carried out in separate rooms under the condition of non-stop system fan and normal operation of the system. Filter bag mouth with elastic expansion ring, sealing performance is good. The filter bag keel adopts polygonal shape, which reduces the friction between the bag and the keel, prolongs the life of the bag, and is easy to unload the bag.
The advantages of central dust collection system is a new improved advantages of central dust collection system based on the MC-I type. In order to further improve the advantages of central dust collection system of MC-I, the original drawing is modified. The advantages of central dust collection system of modified MC-II retain the advantages of MC-I purification, large body capacity, stable performance, good filter bag life, easy operation, small maintenance workload and so on. The dust-containing gas enters the middle and lower box by the inlet of the dust collector. During the process of the dust-containing gas entering the upper box through the filter bag, the dust gas is separated due to various effects of the filter bag. The dust is adsorbed on the filter bag, and the gas enters the upper box through the pipe of the filter bag and is discharged from the outlet. The dust containing gas passes through the purification process of the filter bag, and more and more dust accumulates on the filter bag with the increase of time, which increases the resistance of the filter bag, resulting in a gradual decrease in the amount of gas passing through the filter bag.
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