Dust filter bag fabric design should strive for efficient filtration, easy dust stripping and durability. Dust filter bag is an important part of the dust collector. The bag filter usually chooses the required dust filter bag according to the nature of the dust gas, the nature of the dust, and the dust removal method of the dust collector. The focus is also different.
First, according to the requirements of operating conditions, choose the cost-effective dust filter bag.
1, the gas temperature. The temperature of the gas is lower than 130°C. Select the dust filter bag at normal temperature, and choose the high temperature dust filter bag between 130°C and 260°C.
2, gas humidity. Dust-laden gas is classified into three types according to relative humidity: dry gas (relative humidity below 30%), general state (relative humidity between 30% and 80%) and high humidity gas (relative humidity above 80%). When the humidity is high, you should choose to cover the waterproof bag.
3, the chemical nature of the gas. In a variety of furnace flue gas and chemical waste gas, often contain acids, alkalis, oxidants, organic solvents and other chemical components. Where to choose the filter bag should be based on the chemical composition contained in the flue gas reasonable selection of acid and alkali resistant anti-oxidation dust filter bag.
Second, according to the special nature of dust selected dust bag.
1, the wettability and adhesion of dust. If the dust is hygroscopic and has strong adhesive properties, a dust filter bag with a waterproof membrane filter should be selected.
2, the flammability and chargeability of dust. Certain dusts are flammable. Dust bags should be selected for their flame retardant properties. Anti-static dust filter bag is specially used for charged dust.
Third, according to the dust removal device dust filter bag selection.
1, mechanical vibration bag filter. It is required to select a filter bag that is thin and smooth, soft in texture and conducive to the transmission of vibration waves.
2, back blowing type bag filter. Should choose a soft, stable structure, good wear resistance filter bag.
3, pulse bag filter. An outer filter round bag with a frame is usually used. It is required to use thick, wear-resistant and strong tensile strength.