1. We first understand the temperature of the flue gas to be treated: the filter bag is the core component of the bag filter. It is very important that the selected filter material can adapt to the temperature of the flue gas. If the normal use temperature of the filter material exceeds the temperature of the flue gas, the investment in the equipment increases due to the high cost of the high-temperature filter material. If the normal use temperature of the filter material is lower than the temperature of the flue gas, it may cause the bag to burn and cause great economic loss. Then how to choose the filter material according to the temperature of the flue gas, the filter material is divided into: normal temperature filter material below 130 ° C, medium temperature filter material 130 ~ 180 ° C, high temperature filter material 180 ~ 280 ° C. I know that the temperature of the flue gas and the temperature of the filter material can be selected as the filter material.
2, the second step to understand the composition of the smoke: this includes the dust content, specific gravity, particle size, whether it is sticky, the moisture content of the flue gas and other parameters. By understanding these methods, the dust cleaning method of the dust collector, the post-treatment method of the filter material, and the filtration wind speed are determined. Under normal circumstances, the dust volume is large, the dust is relatively sticky and light, and the pulse bag type dust collector is used. The filtration wind speed is mostly controlled at 1.2 m / min or more, and a few working conditions are less than 1 m / min. Others may use a high pressure backflush type dust collector and a cyclone dust collector as the case may be. The post-treatment method of the filter material generally includes microporous coating, water and oil repellent, antistatic (adding conductive yarn when weaving), and easy to clean, etc., depending on the situation.
3. The third step is to understand the amount of flue gas that needs to be treated: the air volume of the precipitator is usually the working air volume plus the system air leakage coefficient (10%~15%). Knowing the treatment air volume and filtering wind speed of the dust collector, the total filtration area can be obtained by the formula: S= Q/60V. Where S: total filtration area Q: system treatment air volume V: filtration wind speed
4, Know the above points, do you have a certain number of dust collectors to order? As for the structure layout of the dust collector, the specification and quantity of the filter bag, the form and number of the pulse valve are all the engineering masters of the dust collector manufacturer, you only need to accept the dust removal effect of the parameters and the requirements you obtained above. Yes.
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