The filter bag is the core part of the bag filter, and the PPS filter cloth we use will also have special surface treatment to ensure the necessary conditions for the normal operation of the bag filter. The
Selected filter bag performance requirements
1. High temperature resistance: It can be used in the temperature of 120-180°C.
2. Fold-resistant: The filter bag is not damaged after repeated folding, transportation, storage and use.
3. Wear-resisting: The smoke concentration of the flue gas in the general coal-fired boiler is relatively high, and the components of the dust are mainly SiO2, Al2O3, Fe2O3, MgO, etc., which have wear and tear on the filter media and equipment.
4. Oxidation resistance: Domestic coal-fired boilers have higher air excess coefficients, higher oxygen content and nitrogen oxides in the flue gas, and have oxidation corrosion effects on the filter media.
5. Acid corrosion: Because the flue gas contains water vapor and acid gas, when the boiler is overhauled or the local insulation is not good, condensation may occur due to the decrease of the temperature and acid corrosion may occur.
6. Stable performance: It can be used for a long time under the working conditions of flue gas, and it cannot be deformed due to the expansion and contraction of warp and weft. Breathable performance is better, the filter resistance is small. The
The processing material of the filter bag should use its high temperature type effectively. To increase the dust removal efficiency and extend the service life of the filter bag, the weight per unit area of the filter cloth used is >550g/m2. The filter bag mouth adopts a special stainless steel spring ring, which is easy to use and firmly fixed. The bottom of the bag is reinforced with double-layer filter cloth to prevent premature damage to the bottom of the bag. At the same time in order to reduce the filter cloth surface dust adhesion and oxidation effects. The
The filter bag will collide with the cage bone during each cleaning, and the collision with the cage will be over 100,000 times during the entire service life. The quality of the cage has a great influence on the service life of the filter bag. Generally, the cage has good air permeability. It is used in the dust removal of coal-fired boiler flue gas, so that the smoke dust in the flue gas can be trapped on the surface of the powder layer without invading the inside of the filter cloth, and the pressure loss of the filter cloth can be prolonged. Maintain a lower value and extend filter cloth life.