Bag filter is an industrial equipment for air pollution control, mainly used in steam boiler room components. It is used to control sulfur dioxide and other substances. Bag filter types There are different types of bag filters, such as: shaker; Pulse Jet model (one of the promising results). The bag filter works by a four-sided hollow metal body that is tapered underneath. In addition, a vertical squirrel-cage arrangement is used to support and secure the filter bags.
These squirrel-style cages are covered with filter bag material. After covering these cages with filter bags, it looks like a tubular geometry. The lower side of this cage is blind, while the other side is open for smoke exits and pressurized air inlets.
During the steam boiler operation, the flue gas leaving the boiler enters the main body of the bag filter. The smoke is now in contact with the outer surface of the filter bag (tubular). Since the ID fan creates a continuous suction effect, the smoke will try to enter the cage. As a result, larger sized dust particles are collected on the filter surface and the flue gas leaves the bag filter through the outlet. Now, these dust particles attached to the surface of the bag are separated by pressurized air provided by a pulsed jet system mounted on top of the bag filter. This pressurized air enters through the flue gas leaving the opening of the filter bag, and this pressurized air strikes the inner surface of the filter bag. The law of inertia is justified by the separation of stationary dust particles. These separated dust particles are collected at the bottom of the bag filter with the help of a rotating air lock valve. To complete the operation.
Common problems of bag filter system
1. What is a bag filter?
Bag filter, also known as bag filter, fabric filter, used in industry as air pollution control devices and dust collectors.
2. What is the pressure difference of bag filter?
The pressure difference between the dirty air side and the clean air side of the bag dust collector is measured by a differential pressure gauge to send the differential pressure reading to the controller so that the controller can work accordingly.
3. What is the HSN code of the bag filter?
HS code for bag filters: 8421
4. Are there any important bag filter requirements in the boiler?
Bag filters are industrial machinery for air quality prevention, mainly used in the assembly of steam boiler rooms. It is used to regulate the amount of sulfur dioxide and other pollutants.
5. What does a bag filter mean? Colloquially speaking?
A bag filter, as the name suggests, is what you filter. It is one of the integral parts of the boiler system, which can filter the harmful air and control the boiler performance.
Bag filter is a kind of dust removal equipment, its purpose is to remove the dust contained in the exhaust gas of the industrial process. By selecting the filter media accordingly, it is suitable for a variety of applications with different temperatures and gas types. The advantage of bag filter over cyclone collector is that it can collect submicron particles. Bag filters separate dust from exhaust gases by collecting them with the filter medium. Dust accumulates on the surface of the filter medium. The filter medium is cleaned by a airflow called backwash (pulse jet). Bag filters are available in a variety of filter media. Filters are made of materials ranging from polyester and heat-resistant nylon to fiberglass. Select according to the characteristics of gas or dust and other conditions. Filter media are consumables. Dust may leak outdoors when damaged or worn. The expected life of the filter medium depends on the application and type of gas to be cleaned. Therefore, forecasting replacement demand is not easy. In predictive maintenance, a dust monitor continuously monitors downstream dust concentrations. It recommends when filter changes should be made by noticing a slight dust increase. As a result, it can prevent dust leakage and optimize filter replacement frequency, thus reducing the operating cost of bag filters.
