Overview

Industrial bag dust collector is a new type of high efficiency industrial bag dust collector improved on the basis of bag dust collector. It integrates the advantages of various industrial bag dust collector by chamber reverse blowing, overcomes the disadvantages of insufficient dust cleaning strength and uneven air distribution in and out of the chamber, and expands the application range.

Industrial bag dust collector is when the dust-containing gas enters the dust collector by the inlet and outlet, first encounters the inclined plate and baffle in the middle of the inlet and outlet, and the air flow turns into the ash bucket, while the air flow speed slows down, due to the inertia, the coarse particles in the gas directly flow into the ash bucket. It plays the role of pre-collecting dust, and the air flow into the ash hopper then folds upward through the filter bag equipped with a metal skeleton inside and the dust is collected on the outer surface of the filter bag. The purified gas enters the upper cleaning room of the filter bag and is collected into the outlet for discharge. In the process of purifying the dust containing gas through the filter bag, more and more dust accumulates on the filter bag with the increase of time, which increases the resistance of the filter bag. As a result, the treatment air volume is gradually reduced, in order to work normally, to control the resistance within a certain range (140-170 mm water column), once it exceeds the range, the filter bag must be cleaned, cleaned by the industrial bag control instrument sequence trigger the control valve to open the industrial bag valve, the compressed air in the air bag is sprayed into the corresponding filter bag by the holes of the blowpipe. The filter bag instantly expands rapidly, so that the dust accumulated on the surface of the filter bag falls off, and the filter bag recovers its initial state. The dust falls into the ash hopper and is discharged from the body through the ash drainage system. Thus, the dust accumulated on the filter bag is periodically blown to clear the ash, so that the purification gas can pass normally and ensure the operation of the dust removal system.

Working principle

Industrial bag dust collector refers to the method of blowing compressed air to remove the dust attached to the filter medium (bag or filter cartridge); According to the size of the dust collector may have several sets of industrial bag valve, controlled by the industrial bag controller or PLC, each time open a set of industrial bag valve to remove the dust of the part of the bag or filter cartridge controlled by it, while the other bag or filter cartridge works normally, after a period of time the next set of industrial bag valve is opened. The next part of the dust collector is composed of ash hopper, upper box, middle box, lower box and other parts, and the upper, middle and lower box are divided 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 cut off the clean air outlet duct of the chamber first, so that the cloth bag of the chamber is in a state of no air flow through (separate chamber stop air cleaning). Then open the industrial bag valve and use compressed air to spray and clean the industrial bag. The closing time of the cut-off valve is enough to ensure that the dust removed from the filter bag after spraying settles to the ash hopper, avoiding the phenomenon that the dust is separated from the filter bag surface and attached to the adjacent filter bag surface with the air flow, so that the filter bag is cleaned thoroughly. The exhaust valve, industrial bag valve and ash discharge valve are fully 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.

Soot cleaning

With the extension of filtration time, the dust layer on the filter bag continues to accumulate, and the resistance of the dust removal equipment continues to rise. When the resistance of the equipment rises to the set value, the cleaning device begins to clean the dust. First of all, a branch lifting valve is closed, the filter air is cut off, and then the electromagnetic bag valve is opened, the compressed air is rapidly expanded in the upper box in a very short time, and the filter bag is poured into the filter bag, so that the filter bag is expanded and deformed to produce vibration, and under the action of the reverse airflow, the dust attached to the outer surface of the filter bag is stripped into the ash hopper. After the cleaning is completed, the electromagnetic industrial bag valve is closed, the lifting valve is opened, and the chamber is restored to the filtering state. Cleaning each room in turn, from the first room cleaning to the next cleaning for a cleaning cycle. The dust trapped by the filtration and ash cleaning work falls into the ash hopper, and then is centrally discharged by the ash discharging device at the mouth of the ash hopper.

Features

1, the use of chamber air stop industrial bag blowing ash cleaning technology to overcome the shortcomings of conventional industrial bag dust collector and chamber reverse blowing dust collector, strong cleaning capacity, high dust removal efficiency, low emission concentration, small air leakage rate, less energy consumption, less steel consumption, less footprint, stable and reliable operation, good economic benefits. Suitable for metallurgy, building materials, cement, machinery, chemical, electric power, light industry dust gas purification and material recovery.

2, due to the use of separate chamber air stop industrial bag blowing ash, blowing once can achieve the purpose of thorough ash cleaning, so the cleaning cycle is extended, reduce the cleaning energy consumption, pressure gas consumption can be greatly reduced. At the same time, the fatigue degree of the filter bag and the industrial bag valve is also reduced, thereby doubling the life of the filter bag and the valve disc.

3, 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, good sealing performance, firm and reliable. 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.

4. 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 to improve the operating conditions of bag changing.

5, the box is air-tight design, good sealing, inspection door with excellent sealing materials, the production process to kerosene leak detection, air leakage rate is very low.

6, inlet and outlet air duct layout is compact, small airflow resistance.

Application industry

The industrial bag dust collector adopts the technology of off-line industrial bag dust removal, which overcomes the shortcomings of reverse air dust removal and general industrial bag dust removal. It has strong dust removal capacity, high dust removal efficiency, low emission concentration, small air leakage rate, low energy consumption, less land area, and reliable and stable operation. This series of dust collector is especially suitable for the following occasions: calcium carbide furnace dust removal, ferroalloy plant all kinds of electric furnace dust removal; Steel plant flue gas purification; Dust removal of coal-fired boilers and small boilers in power plants; Garbage incinerator dust removal; High temperature flue gas dust removal in smelters; Aluminum plant flue gas purification; Dust removal at the end and head of rotary kiln in cement plant; Carbon black plant exhaust dust removal. Its application field is characterized by high temperature and large smoke volume.