Classification of bag filters:
According to the national standard for classification and specification performance representation of bag filters, bag filters are divided into five categories. The dust removal method is the main indicator of the classification of bag filters:
(1) Mechanical vibration
A bag filter that uses mechanical devices (including manual, electromagnetic, or pneumatic devices) to vibrate the filter bag and clear dust has two types of construction forms: a non compartmentalized structure suitable for intermittent work and a compartmentalized structure suitable for continuous work.
(2) Chamber backwash type
Adopting a compartmentalized structure, using valves to switch airflow chamber by chamber, under the action of reverse airflow, the bag filter is forced to shrink or bulge and clean the dust.
(3) Spray nozzle blowback type
A bag filter (all non compartmentalized structures) that uses a high-pressure fan or compressor to provide backflow airflow and uses a moving nozzle for backflow, causing the filter bag to deform, shake, and penetrate the filter material for dust removal.
(4) Vibration and blowback combined use class
A bag filter that combines mechanical vibration (including electromagnetic vibration or pneumatic vibration) and reverse blowing for dust removal (both are chamber structures).
(5) Pulse injection type
A bag filter that uses compressed air as the cleaning power and uses a pulse spraying mechanism to instantly release compressed air, inducing several times the high-speed injection of secondary air into the filter bag, causing the filter bag to bulge rapidly. It relies on impact vibration and reverse airflow to clean the dust.
Advantages of bag filter:
⑴ The dust removal efficiency is high, generally above 99%. The dust concentration at the outlet of the dust collector is within tens of mg/m3, and it has a high classification efficiency for fine dust with sub micron particle size.
⑵ The range of air volume processing is wide, ranging from only a few cubic meters per minute for small ones to tens of thousands of cubic meters per minute for large ones. It can be used for dust removal in industrial furnaces and kilns, reducing the emission of atmospheric pollutants.
⑶ Simple structure and convenient maintenance and operation.
On the premise of ensuring the same high dust removal efficiency, the cost is lower than that of electrostatic precipitators.
When using high-temperature resistant filter media such as glass fiber, polytetrafluoroethylene, and P84, it can operate under high temperature conditions above 200 ℃.
(6) Not sensitive to the characteristics of dust, unaffected by dust and electrical resistance.
Classification of bag filters:
According to the national standard for classification and specification performance representation of bag filters, bag filters are divided into five categories. The dust removal method is the main indicator of the classification of bag filters:
(1) Mechanical vibration
A bag filter that uses mechanical devices (including manual, electromagnetic, or pneumatic devices) to vibrate the filter bag and clear dust has two types of construction forms: a non compartmentalized structure suitable for intermittent work and a compartmentalized structure suitable for continuous work.
(2) Chamber backwash type
Adopting a compartmentalized structure, using valves to switch airflow chamber by chamber, under the action of reverse airflow, the bag filter is forced to shrink or bulge and clean the dust.
(3) Spray nozzle blowback type
A bag filter (all non compartmentalized structures) that uses a high-pressure fan or compressor to provide backflow airflow and uses a moving nozzle for backflow, causing the filter bag to deform, shake, and penetrate the filter material for dust removal.
(4) Vibration and blowback combined use class
A bag filter that combines mechanical vibration (including electromagnetic vibration or pneumatic vibration) and reverse blowing for dust removal (both are chamber structures).
(5) Pulse injection type
A bag filter that uses compressed air as the cleaning power and uses a pulse spraying mechanism to instantly release compressed air, inducing several times the high-speed injection of secondary air into the filter bag, causing the filter bag to bulge rapidly. It relies on impact vibration and reverse airflow to clean the dust.
Advantages of bag filter:
⑴ The dust removal efficiency is high, generally above 99%. The dust concentration at the outlet of the dust collector is within tens of mg/m3, and it has a high classification efficiency for fine dust with sub micron particle size.
⑵ The range of air volume processing is wide, ranging from only a few cubic meters per minute for small ones to tens of thousands of cubic meters per minute for large ones. It can be used for dust removal in industrial furnaces and kilns, reducing the emission of atmospheric pollutants.
⑶ Simple structure and convenient maintenance and operation.
On the premise of ensuring the same high dust removal efficiency, the cost is lower than that of electrostatic precipitators.
When using high-temperature resistant filter media such as glass fiber, polytetrafluoroethylene, and P84, it can operate under high temperature conditions above 200 ℃.
(6) Not sensitive to the characteristics of dust, unaffected by dust and electrical resistance.