The rotary kiln produced by Henan Zheng Mining Machinery Co., Ltd. has a mature technology and high quality. Currently we promote environmental protection and energy saving. In the following, we will talk about the existing problems of the dust collector in process of the rotary kiln tail operation.

The dust collectors installed in the tail of the rotary kiln may have the problems, such as bag broken, serious corrosion and deformation of the inner wall of the dust collector, serious deformation of ceiling and upper shell body, excessive dust emissions, unsmooth air exhaust of the kiln system, therefore it will cause the inadequate products and reduced quality gradually. The engineers in Henan Zhengzhou Mining Machinery Co., Limited analyze the reasons as follows:

1. Although the use of glass fiber membrane filter media has the properties of high temperature resistance, acid and alkali resistance, high filtration efficiency, low filtration resistance, the biggest drawback is not anti-fracture. careless installation will damage the film on the surface, also it can not process high pressure cleaning and has a very strict requirements of the bag cage, which will directly affect the dust collection rate.

2. main pipe of spray only has blowing hole. in the spray blowing , the gas road direction is easy to be changed, resulting in that blowing gas is not perpendicular to the bag and the bag mouth often seriously be damaged.

3. Since the commissioning and operation of the kiln system is unstable, inlet temperature of dust collector is not easy to control, it leads to the deformation of ceiling, therefore it will not on the horizon, the uneven spacing between the bag and the bag range.

4. The injection pressure of commissioning and operation is 0.42MPa and the injection time interval is 5S. the pressure of dust removing is a little higher and the time interval is shorter. The glass fiber coated filter material can not stand the high pressure, most of the bags may be broken after running less than half a year.

5. The height of the dust collector waterproof is 5cm. There is a 5cm distance between the curb and curb, and the seal of some places is not strict, therefore the water can not be discharged in time in the rainstorm day, resulting in partial rain enter into the dust collector, not only have an corrosive effect on the case body, but may paste the bag seriously, affecting the lifetime and dust collection efficiency.

6. The inlet temperature of the dust collector is about 230 degrees. When the cooling effect of the conditioning tower is not ideal, the inlet temperature of the bag can reach about 260℃. If operating in the high temperature for a long time, it will shorten the lifetime of the bags.

7. There is only one main pipe for the controlling of the dust collector gas path, which is adjusted by the regulator. If there is a faulty of valve, it can not be adjusted or replaced online, but be forced to stop dust collector for changing, causing difficulties for the continuous operation of the equipment.

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