Dryer filter dryer is designed to handle dust precipitator dryer exhaust filter. Dryer is in front of the stove by drum roll into the hot air drying of materials. Because of the way the dryer front coal stove used, the exhaust gases contain large amounts of SO2 and water vapor, it is easy to condensation, resulting in highly corrosive at high temperature oxygen-rich conditions, but also easy to produce corrosive strong H2SO3, therefore, dryer exhaust gas treatment has been troubled by a serious production problems. In dealing with this type of gas must pay attention to the above points exhaust properties. For such working conditions, the company conducted a special treatment for dust, made of ordinary steel flower plate 325 to replace stainless steel, bag selected high temperature, anti-corrosion treatment of the bag - fluorine Gomez, skeleton the use of silicone-treated (or made of stainless steel). Dust inside through three processing epoxy polyester anti-corrosion coatings. 10 cm thick outer layer of rock wool and color plate made of lightweight thermal insulation. After these improvements, dust to meet the working conditions of the dryer. Dryer filter in the course of other units there had been some problems, such as paste bag, burn bags, chassis corrosion, improper operation and maintenance. In this regard the use of the following measures. 1, good corrosion protection, since coal produces large amounts of SO2 gas in the combustion process, coupled with high temperatures and humidity collected, thus accelerating the corrosion inside the enclosure and in contact with the gas pipe. To this end, we have adopted a 200-300 ℃ high temperature anti-corrosion coatings, generally three-layer coating, it can solve this problem, prolong the life of the cabinet. 2, bag cage: original bag cage after galvanized, all but two years of corrosion, later changed to the production of stainless steel wire or silicone-treated. 3, improved cleaning system, water separator apparatus original factory configuration is too small, oil, water separation is poor, oil, water, blowing with compressed air through a pipe anti-bag, the effects of the filtering effect, when the temperature is too high, easily ignited and burned the bag. After oil, water filtration device modified regularly put oil, turn on the water, to eliminate this phenomenon from happening again. 4, select the appropriate cleaning pressure, the pressure is too high, resulting in broken bags; pressure is too low, can not produce pulse cleaning effect. So pressure is generally selected 0.5-0.7Mpa. 5, the choice of the specific circumstances of the bag, I choose embalmed temperature fluorine Gomez, the working temperature 70-185 ℃, continuous working temperature up to 180 ℃, avoid the situation that occurred high temperature flue gas burn bag filtration wind speed 0.8-1.2m / min. Fiberglass filter bag than the average high wind speed of about 40%, reduce equipment investment. 6, regularly clean up the bag between artificial push, pull and other ways to make the bag attachment between the fall in order to increase ventilation filter area, extend the life cycle; you can also stop the machine to replace the bag, the bag removed after washing dried in the use; repair damaged bag. By adopting the above measures to meet the requirements of the dryer exhaust gas mining process to address compliance issues.