First of all, high temperature damage to the dust bag is fatal: As a pulverized coal drying kiln in Shenyang, because the pulverized coal particles after drying are very small and sticky, the dust is not ideal, leaving a large amount of dried pulverized coal on the surface of the dust bag. The pulverized coal after drying has a very low ignition point. When the high-temperature flue gas enters the precipitator, it quickly ignites the pulverized coal on the surface of the bag, causing the dust bag and skeleton of the entire precipitator to be completely destroyed.
Followed by Mars burning: Mars in the smoke damage to the dust bag is also very serious. Such as coke oven, drying kiln, chain furnace, cupola furnace, electric furnace, blast furnace, mixed iron furnace, etc. in the production process there will be a large number of Martian mixed into the flue gas, such as the Mars processing is not timely, especially the bag surface dust layer is thin It will cause Mars to burn the bag and form an irregular round hole. However, when the bag surface is thick, Mars will not directly burn the dust bag, but will cause the surface of the bag to form a deep-colored baking trace.
The most common high temperature shrinkage: Another high temperature flue gas dust bag damage is the high temperature shrinkage, although the use of each filter temperature is not the same, but when the flue gas temperature exceeds its use temperature, such as the longitude If the shrinkage rate is too large, the size of the dust bag will be shortened in the length direction, and the bottom of the cloth bag will be damaged by the force of the dust-removing frame. If the heat shrinkage of the cloth bag is too large, the filter bag will become smaller in radial size. The cloth bag is tightly clamped on the dust removal frame, and even the cloth bag cannot pull out the frame. Thus, the bag is always in a stressed state, causing the bag to shrink, deform, harden, and become brittle, while accelerating the strength loss and shortening the life of the bag. And because the bag deformation tightly hoop on the skeleton, the bag is difficult to deform when cleaning, unfavorable to spray cleaning, resulting in high resistance of the filter bag.
Dust bag heat shrinking mainly in the following aspects:
1. Dust-removing skeleton and dust bag, even top to upper blowing pipe;
2. dust bag can not be extracted from the dust removal frame;
3. the bottom of the dust bag is damaged, due to the contraction of the bottom of the bag is broken dust skeleton;
4. dust bags darker.