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Production of raw materials for the cement industry is still mostly used dry rotary dryer, drying process due to its emission of waste gas and dust containing high concentrations of coarse grain size, moisture content of large, irregular changes in the flue gas, so collecting relatively difficulties, dust particles on the equipment, piping badly worn, dust collection process Light Weight Block Machine prone to condensation and corrosion. Combined with some of the dust removal equipment manufacturing enterprises to adopt simple, low collection efficiency, environmental pollution is serious, it is difficult to meet the needs of production and environmental protection. Therefore, the characteristics of the dryer exhaust dust, do the following description: 1 large moisture content, dew point temperature is high Moisture content of the dryer exhaust is generally more than 15%, the dew point temperature of 40-50 degrees, if the sulfur content of coal is high, the dew point temperature will increase and produce acid corrosion. To avoid this phenomenon, should control the operation of the dryer exhaust gas temperature above the dew point temperature of 20-50 degrees. , Namely: the dew point temperature reaches 70 degrees, the winter requires even higher than 70-80 degrees, in order to ensure the dust cement equipment collector for high temperature, high humidity exhaust emissions effectively. 2. Dust particles, high concentrations As currently used ventilation dust collection system are full negative pressure, air quantity is large, so the dust concentration in the exhaust gas is high, especially for the requirements of the drying yield, requires less than 2% moisture, the flue gas dust concentration also increased dramatically, dust particles is relatively too large, so the drying duct such materials and equipment for increased wear and tear, dust collection more difficult. 3 Dryer intermittent operation Many cement plants dryer systems often employ a multi-purpose way rotation operation of several materials, this method of drying characteristics of the different materials, Autoclaved Aerated Concrete machinerydust collection equipment can easily result in the emergence of poor management condensation, fouling phenomena , especially in the north and winter cold junction fouling easier, but not conducive to production and equipment operation and maintenance
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