A brief introduction to the development history of bag-type
Since 1881, the German Betch factory machinery vibration soot cleaning bag filter the German patent and start commercial production of bag filter, bag filter in the ash removal technology of bag filter technology development rapidly and improve about J. At present, the control of particulate dust in industrial exhaust gas is controlled by bag-type dust remover, especially the high activity particulate dust which is produced by high temperature smelting and fuel combustion, and the technology is becoming more and more mature. Its dust removal efficiency is 99. Emissions by more than 99%, the quality of the gas concentration is less than 50 ㎎ / m after, even low 10 ㎎ / m3. And the specification is complete, the scope of application is wide, not affected by the dust resistivity, there is no water pollution problem. Under the conditions of other technical measures, the solid, liquid and gas pollutants in the industrial waste gas can be cleaned at the same time. The working principle of bag-type dust collector is: when the dusty gas enters the dust catcher, the coarse dust falls into the dust bowl due to the collision effect of the guide plate and the gas velocity. The remaining fine particles dust with gas into the filter bag chamber; Due to the inertia, diffusion, barrier, hook, and electrostatic effect of the fiber and fabric of the filter material, the dust is resided in the filter bag, and the purified gas escapes from the bag and is expelled through the exhaust pipe. The ash on the filter bag is removed by the method of gas backwashing or the pulsed air flow, and the dust removal is discharged by the ash discharging device. The clean ash method of bag-type dust collector is becoming more and more mature. The current research mainly focuses on the filter material. The performance and quality of filter material are directly related to the performance and service life of bag filter. The filter material has been developed from natural fiber to the present synthetic fiber, which has greatly improved the dust removal performance and application range of bag-type dust remover. At present, the research of filter material mainly focuses on the development of surface coated filter material, and the surface coating technology has revolutionized the dust removal performance of the filter material.
自1881年德国Betch工厂的机械振动清灰袋式除尘器获德国专利并开始袋式除尘器的商业化生产以来，袋式除尘器的清灰技术及袋滤技术得以迅速发展和提高L7 J。目前袋式除尘器对工业废气中微粒粉尘的控制，尤其是对高温冶炼和燃料燃烧生成的高活性微粒粉尘的控制，技术上已日趋成熟。其对微粒粉尘的除尘效率在99．99％以上，排放气的质量浓度小于50 ㎎/m³，甚至可低达10㎎／m3．且规格齐全，适用范围广，不受粉尘电阻率的影响，不存在水污染问题。在采取其他技术措施的条件下，可同时清洁工业废气中的固、液、气3类污染物。袋式除尘器的工作原理为：当含尘气体进入除尘器时，粗粉尘因受导流板的碰撞作用和气体速度的降低而落人灰斗中；其余细小颗粒粉尘随气体进入滤袋室；受滤料纤维及织物的惯性、扩散、阻隔、钩挂、静电等作用，粉尘被阻留在滤袋内，净化后的气体逸出袋外，经排气管排出。滤袋上的积灰用气体逆洗法或喷吹脉冲气流的方法去除，清除下来的粉尘由排灰装置排走。袋式除尘器的清灰方式已日趋成熟，目前的研究主要集中在滤料上。滤料性能和质量的好坏，直接关系到袋式除尘器的性能和使用寿命。滤料已从天然纤维发展到现在的人工合成纤维，从而使袋式除尘器的除尘性能及应用范围有了大幅提高。目前滤料的研究主要集中在表面覆膜滤料的开发上，表面覆膜技术给滤料的除尘性能带来了革命性的变化。
