Pulse bag filter has been widely used and continuously improved at home and abroad, and has made great progress in purifying dusty gases. Due to advanced dust cleaning technology and significantly improved gas to cloth ratio, it has the characteristics of large processing air volume, small footprint, high purification efficiency, reliable operation, simple structure, and low maintenance. The dust removal efficiency can reach over 99%. It is a mature and relatively complete high-efficiency dust removal equipment.

Working principle of high-efficiency boiler pulse bag filter:

The dusty gas enters the filtering chamber through the ash hopper (or a spacious open flange at the bottom), and the coarser particles directly fall into the ash hopper or ash bin. The dust gas is filtered by the filter bag, and the dust is retained on the surface of the filter bag. The clean gas passes through the bag mouth to the clean air chamber and is discharged into the atmosphere by the fan. When the dust on the surface of the filter bag continues to increase, causing the equipment resistance to rise to the set value, the time relay (or micro differential pressure controller) outputs a signal, and the programmable controller starts to work. The pulse valves are opened one by one, and the compressed air is sprayed through the nozzle to clean the filter bag, causing the filter bag to suddenly expand. Under the action of reverse airflow, the dust attached to the surface of the filter bag quickly separates from the filter bag and falls into the ash hopper (or ash bin). The dust is discharged After the dust cleaning by spraying is completed, the dust collector resumes normal operation.

　　Pulse bag filterWhen the equipment is working normally, dusty gas enters the ash hopper through the air inlet. Due to the rapid expansion of gas volume, some coarse dust particles fall into the ash hopper due to inertia or natural settling, while the rest of the dust particles rise into the bag chamber with the airflow. After being filtered by the filter bag, the dust particles are trapped on the outside of the filter bag. The purified gas enters the upper box through the inside of the filter bag and is then discharged into the atmosphere through the valve plate hole and exhaust outlet, thus achieving the purpose of dust removal. As the filtration continues, the resistance of the dust collector also increases. When the resistance reaches a certain value, the dust cleaning controller issues a dust cleaning command, first closing the lifting valve plate and cutting off the filtered airflow; Then, the dust cleaning controller sends a signal to the pulse solenoid valve. As the pulse valve sends high-pressure reverse airflow used for dust cleaning into the bag, the filter bag rapidly swells and produces strong shaking, causing the dust on the outside of the filter bag to shake off, achieving the purpose of dust cleaning. Due to the fact that the equipment is divided into several box areas, the above process is carried out box by box. While one box area is cleaning, the remaining box areas are still working normally, ensuring the continuous and normal operation of the equipment. The key to being able to handle high concentration dust is that the cleaning time required for this strong cleaning is extremely short (only 0.1-0.2 seconds for one spray).

Characteristics of high-efficiency boiler pulse bag filter:

1. This dust collector adopts the technique of segmented air stop pulse blowing for dust cleaning, which overcomes the shortcomings of conventional pulse dust collectors and segmented back blowing dust collectors. It has strong dust cleaning ability, high dust removal efficiency, low emission concentration, low air leakage rate, low energy consumption, low steel consumption, small footprint, stable and reliable operation, and good economic benefits. Suitable for the purification of dusty gases and material recovery in metallurgy, building materials, cement, machinery, chemical, power, and light industry industries.

2. Due to the use of split chamber air stop pulse spraying for thorough cleaning, the cleaning cycle is extended and the energy consumption for cleaning is reduced, resulting in a significant decrease in compressed air consumption. At the same time, the fatigue level of the filter bag and pulse valve is correspondingly reduced, thereby doubling the service life of the filter bag and valve plate.

3. The maintenance and bag replacement can be carried out in separate rooms without stopping the system fan and under normal operating conditions of the system. The filter bag mouth adopts an elastic expansion ring, which has good sealing performance and is firm and reliable. The filter bag keel adopts a polygonal shape, reducing friction between the bag and the keel, extending the life of the bag, and facilitating bag unloading.

4. Adopting the upper bag extraction method, after extracting the skeleton during bag replacement, the dirty bags are put into the lower ash hopper of the box and removed from the manhole, improving the operating conditions for bag replacement.

5. The box adopts an airtight design with good sealing performance. The inspection door uses excellent sealing materials, and during the manufacturing process, kerosene is used for leak detection, resulting in a very low air leakage rate.

6. The layout of the inlet and outlet air ducts is compact, with low airflow resistance.