Vacuum belt dewatering machine is an important equipment for the secondary dehydration of gypsum. The quality of the filter cloth determines the effect of the dehydration of the filter. The service life of the filter cloth is determined by the type, performance, working condition and temperature of the filter To decide. But in the use of the filter cloth often occurs in the phenomenon of congestion, which will seriously affect the filter cloth filter effect.
Some power plants are not twenty-four hours in the boot, may stop using, as in this case if the downtime is not timely cleaning filter cloth, gypsum will appear in the filter cloth surface scaling, silted cloth cloth surface Gap, in the future will be difficult to clean the use, so as to shorten the life of the filter cloth, but also affect the filter effect. So the filter shutdown, must first filter the surface of the residual gypsum clean. Keep the surface of the filter cloth clean. Under normal circumstances the filter cloth in the use of a period of time when the need to be replaced, because the filter cloth in the normal use of a period of time, there will be deformation, shrinkage occurs;
In addition there are impurities in the treatment of impurities in the filter cloth can not be washed off, although the filter cloth is not damaged but has seriously affected the filter effect. From the cyclone out of the gypsum slurry in the acid insoluble content of excessive will block the filter cloth, acid insoluble the main source of three: 1, limestone powder containing insoluble in the acid content of substances such as carbides, heavy metal ions, Aluminum oxide, insoluble silicate, alumina, clay and other refractory materials 2, the use of water-insoluble acid impurities in the water exceeded, and some power plant process water is recycled, so that the process directly caused by acid High content, and ultimately lead to serious acid insoluble in the slurry exceeded, blocking the filter cloth. 3, flue dust in the process of excessive impurities, especially electric dust, with high impurities, it is recommended to use dust bag bag.