The cost of dust collection bags is not high, but due to its application characteristics, even a high-quality dust collection bag has an average life span of 1-2 years. If there are special conditions, the service life of the bag is only a few months. If that inappropriate materials or improper use will reduce its service life. As the so-called accumulation of sand becomes a tower, if that the dust bag is always changed for anti-overlap. The cost is also considerable. The following is the need for us to clarify the important shortcomings and preventive facilities of the Dust collection bags.
1. Destruction:
- The reason for the destruction of the dust collector bag is that the thickness of the initial layer of the dust bag appearance is insufficient, and the temperature of the flue gas is too high.
- If the flue gas temperature that the dust collector always handles exceeds the working premise of the bag, and the Dust collection bags is hardened and compressed or ablated to cause holes.
- If the thickness of the initial layer is insufficient, the inflow of sparks in the flue gas or the heating of the dust may also cause holes in the dust bag to burn out. The key to the destruction of dust-removing cloth bags is reflected in the newly-replaced dust-removing cloth bags online. Since the pre-painting is not stopped after the online change, the high-temperature flue gas simply touches the cloth bag with sparks, which is easy to cause the dust bag to be burned.
2. Wear and tear:
- Wear and tear of the dust-removing cloth bag must occur in the middle of the dust collector, and on a single dust-removing cloth bag, it must occur within 1 meter of the outlet. The main reason is that the flue gas is unevenly distributed. The flow velocity in the middle of the single room is too high, and the filter air velocity on the outlet of a single dust bag is too high.
- Even dust attacks and wears the bag, which also affects the tension of the fabric fiber of the dust bag. The bag is perforated and the service cycle is too short. For dust-removing cloth bags for frequently worn parts, it is initiated to add a protective layer to the worn positions and replace them with more wear-resistant cloth bags.
3. The dust bag installation is not standard.
- The interval between the dust collection bags is too small, the skeleton is winding, etc., which cause the abrasion between the cloth bags. The matching gap between the cloth bag and the dust removal framework in the diameter direction. Too small will result in poor cleaning results, which will reduce the cleaning cycle and the pressure of the forward blowing atmosphere;
- When it is too large, the debate between the cloth bag and the dust removal framework will increase, thus speeding up Wear of cloth bags. For some filter cloths that change greatly with temperature and have the characteristics of elongation, special attention should be paid.
4.The welding of the filter bag cage is not standardized
- When there are holes or burrs in the welding of the skeleton, or the rough appearance due to corrosion, it will also accelerate the wear of the bag. The bag and the pattern hole are not tightly sealed, which will cause wear at the top of the Dust collection bags.
5.The venturi installation is not standard.
- The venturi or pulse tube is not aligned with the cloth bag properly, so that the airflow from the blowing tube will simply wash the upper section of the cloth bag and cause wear. Too frequent cleaning of cloth bags will accelerate the wear of cloth bags.
6. Too high filtration air velocity
- Too high filtration air velocity will rupture the initial dust layer and cause excessive abrasion by dust attacking the bag. If that the cleaning frequency of the bag is too high at this time, it will easily cause the fabric of the bag to become loose and accelerate the abrasion of the bag. Dust in the flue gas surpasses the plan example, and will also accelerate the wear of the cloth bag. Excessive accumulation of dust in the small ash bucket, and even excessive dust in the flue gas in the flue gas chamber, will also accelerate the wear of the dust collector bags.
Measures to reduce wear and tear dust collection bags :
- In the middle of the installation process, stop adjusting and changing the bag with too small spacing and winding frame;
- The diameter of the Dust collection bags and the frame The direction should be suitable, and the length of the frame should be slightly less than the length of the bag;
- The filter bag cage should be checked carefully before use, and the damaged filter bag cage should not be used;
- The Dust collection bags and the flower orifice plate should be sealed tightly and leak-proof. If necessary, fluorescent powder can be used to check for leakage point;
- The filter bag cage tube and the pulse tube are aligned accurately. In the course of the operation, it is necessary to avoid the factors of too high filtration speed, too short cleaning cycle of the cloth bag, and too high pressure to spray the curled atmosphere.
- When setting the pulse cleaning cycle of the dust collector, it can ensure that the dust collector works under a solid pressure and the set pulse cleaning cycle time is the longest;
- The pulse cleaning time can ensure that the initial dust is not scattered, set The cleaning time is the shortest; assuming that the initial dust layer is lacking, the cleaning cycle can be extended as compensation; if that the pressure difference control is used, the stability of the inlet and outlet pressure settings of the dust collector can be improved.