Excessively high operating resistance of pulse bag filter

Pulse bag filter generally uses compressed air for cleaning and cleaning. The compressed air contains more oil, water and impurities. If it is directly injected into the filter bag without purification, it will cause the filter bag to be contaminated and damp and cause condensation.
1. The cleaning time period and dust removal period are too long. The dust on the cloth bag cannot be cleaned and the dust collector is transferred to the state, which will increase the running resistance quickly. For the pulse bag filter, the cleaning time used is the cleaning time, adjustable between 0.05-0.5s. The time between two cleaning intervals is the cleaning cycle, which is generally 0-30 minutes. Adjust the cleaning system of pulse bag filter, properly lengthen the cleaning time, increase the amount of compressed air injected into the filter bag and the amount of induced air; at the same time, shorten the cleaning cycle or even use a continuous cleaning method to make the bag clearer Effectively reduce operating resistance.
2. When the pulse bag filter handles high temperature and high humidity gas, if the gas temperature is lower than the dew point during operation, the water vapor will condense and dew, so that the bag will be damp, a large amount of dust will adhere to the surface of the filter bag, and the filter bag will be clogged. The pores, and the compressed air that is blown, cannot be removed, resulting in a bag of filter bags. The dust removal function of the dust bag produced by the paste bag is invalid, the resistance is too large, and the operating condition deteriorates. To prevent the baghouse from condensing the bag, it is necessary to maintain the processing gas temperature at 25 to 35°C above its dew point. When the precipitator is used to process high-temperature and high-humidity gases, a temperature detection and alarm device shall be installed at the entrance to monitor it, and thermal insulation material such as rock wool shall be installed outside the shell to insulate it. Before the dust removal system stops running, the wet gas in the dust collector must be completely discharged and replaced with dry air to prevent condensation. That is, after the production equipment stops operating, the dust removal fan must be extended for a period of time before stopping.
3, pulse bag filter is usually under negative pressure conditions, if the device leaks, it will inhale a lot of outside air and rain, so that filter bag moisture knot, increase operating resistance. Therefore, the dust collector is required to be tightly sealed and the air leakage rate is less than 3%. Welding quality is critical during the installation of the equipment. All welding must be carried out in accordance with the relevant specifications and standards. After the welding is completed, kerosene, phosphor, etc. shall be used for leakage inspection, and the leak must be re-welded. The inspection door of the dust collector must be sealed with a rubber strip and checked and replaced frequently. Carefully inspect the unloaders and flanges and seal them. Reducing the amount of air leakage from the dust collector can effectively protect the filter bag from the occurrence of paste bags and ensure the smooth operation of the equipment under low resistance.
4、Pulse bag type dust collector generally adopts compressed air for cleaning and cleaning. Compressed air contains more oil, water and impurities. If it is directly injected into the filter bag without purification, it will cause the filter bag to be contaminated and damp and cause condensation. . If the precipitator treats high-temperature, high-humidity gases, once the cold compressed air is injected, the cold and hot intersection will cause dew condensation on the surface of the filter bag if it reaches the dew point temperature, resulting in the formation of compaction after adhering to a large amount of dust. In order to avoid the contaminants of the compressed air and lead to sticking, it is necessary to formulate and implement a working system, and insist on the daily opening of the gas storage tank, triple supply of gas source, and the discharge valve of the pulse valve manifold to exclude oil and water contaminants. The freeze dryer and heater can be installed in front of the pulse valve manifold, so that the compressed air can be further dehydrated and heated before being sprayed into the filter bag for cleaning.