Polyester filter bag

Dust removal bag is one of the accessories on dust removal equipment, generally called: dust removal filter bag, dust removal bag, filter bag, filter bag, dust collection bag, dust collection bag, dust removal filter bag, dust collector bag, dust removal bag is a bag type The key part in the operation of the dust collector is generally that the cylindrical filter bag is hung vertically in the dust collector.

The filter material of the bag filter is cloth or felt made of synthetic fibers, natural fibers or glass fibers. Sew the cloth or felt into a cylindrical or flat filter bag as needed. According to the nature of the flue gas, select the filter material suitable for the application conditions. Usually, when the flue gas temperature is lower than 120°C and the filter material is required to have acid resistance and durability, polyester flannelette and polyester needle-punched felt are often used; when dealing with high-temperature flue gas (<250°C), graphitization is mainly used. Glass cloth; in some special cases, choose carbon fiber filter material, etc.  

It is very important to control the speed at which the flue gas passes through the filter material (called the filtration speed) during the operation of the bag filter. Generally, the filtration speed is 0.5-2m/min, and the efficiency for particles larger than 0.1µm can reach more than 99%, and the resistance loss of the equipment is about 980-I470Pa.

Each type of bag filter must choose the corresponding dust bag. How should the dust bag of the bag filter be selected? What are the characteristics of the polyester filter bag?

1. Vibration dust removal: The characteristic of this dust removal method is that the kinetic energy applied to the dust layer is smaller than that of the pulse injection and reverse blowing types, and it is a low-energy type of dust removal. Therefore, it is appropriate to use a fabric dust filter bag. Flexible fabrics have better vibration wave transmission. to

2. Anti-blowing (reverse air shrinkage bag) dust removal: This method of dust removal generally uses fabric dust bag, but it can also use felt with relatively light cloth weight (300-400g/m2), full of softness, and small size change. material. Among them, glass fiber dust bags are mostly used, and most of them are used in large bag dust collectors. There are certain requirements for the hoisting and sewing of the dust filter bag. If you do not pay attention, it will have a great impact on the service life of the dust filter bag.

3. Pulse jet dust removal: This method of dust removal exerts good kinetic energy on the dust layer, and is a typical way of external filter dust removal. The cleaning power is very strong, and the residual amount of dust attached to the yarn of the dust bag is relatively small. The dust bag used is generally felt or needle felt. Under the action of pulse injection, the dust removal filter bag deforms greatly instantly and generates great stress, so filter materials with strong tensile strength must be used. Dust removal bags often rub against the frame, so wear-resistant dust removal bags must be used, or fabric dust removal bags can be used. to

Features of dust bag

1. The filter bag has a long service life and is easy to maintain.

2. The filter bag is installed with a skeleton, which has good sealing performance and is strong and reliable.

3. The inlet and outlet air ducts of the boiler dust collector are compactly arranged and the air flow resistance is small.

4. The boiler dust collector has high dust removal efficiency, good filtration effect, small size and stable operation.

5. The box adopts air-tight design with good sealing performance. The door sealing material is used and the air leakage rate is very low.