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山东布袋除尘设备工作方式

来源:未知    作者: admin; 发布日期:2019-12-16 13:28

山东布袋除尘设备工作方式
Working mode of bag filter in Shandong Province
把工业产生的粉尘从烟气中分离出来的设备叫工业除尘器或布袋除尘设备.如今主要使用于这些粉尘处理的设备有布袋除尘器、滤筒除尘、静电除尘器。以下我们便来说说其具体的工作原理。
The equipment to separate the industrial dust from the flue gas is called industrial dust remover or bag dust remover. Nowadays, the equipment mainly used for dust treatment are bag dust remover, filter cartridge dust remover and electrostatic precipitator. Let's talk about how it works.
布袋除尘
Bag dust removal
本除尘器主要由灰斗、过滤室、净气室、支架、提升阀、喷吹清灰装置等部分组成.工作时,含尘气体由风道进入灰斗.大颗粒的粉尘由于重力作用,直接落入灰斗底部,较小的粉尘随气流转折向上进入过滤室,并被阻留在滤袋外表面,净化了的烟气进入袋内,并经滤袋口和净气室进入,最后通过风机的作用把洁净的空气排放出去。
The dust remover is mainly composed of a dust hopper, a filter chamber, a clean air chamber, a bracket, a lifting valve, an injection and cleaning device, etc. during operation, the dust containing gas enters the ash hopper from the air duct. Due to the effect of gravity, the large particles of dust fall directly into the bottom of the ash hopper, and the smaller dust flows upward with the air into the filter chamber and is blocked on the outer surface of the filter bag. The purified flue gas enters the bag and flows through the filter bag mouth and The clean air chamber enters, and finally the clean air is discharged through the function of fan.
随着设备工作时间不断的增加,通过滤袋的粉尘越来越多,从而滤袋所受的阻力负荷也随之上升,此时,使用脉冲反吹出去附着在滤袋上的粉尘。
With the continuous increase of working time of the equipment, more and more dust passes through the filter bag, so the resistance load of the filter bag also rises. At this time, the dust attached to the filter bag is blown out by pulse back blow.
如此循环交替,使滤袋的工作效率一直保持不变,使通过除尘器的粉尘都能达到排放标准。
Such cycle alternation keeps the working efficiency of the filter bag unchanged, so that the dust passing through the precipitator can reach the emission standard.
滤筒除尘器
Cartridge filter
从某种原理来说滤筒除尘器与布袋除尘器的工作原理是相同的。唯一的区别有3点。(1)过滤精度不一样,布袋的过滤精度一般在0.5~1um以内。滤筒的过滤精度最少能达到0.2um。(2)设备维护不一样,滤筒除尘器的维护比布袋的维护方便很多,一般若相同风量的除尘设备,滤筒维护需要1天,那布袋最少需要3天。
In a way, the working principle of the filter drum dust remover and the bag dust remover is the same. The only difference is three. (1) the filtering accuracy is different, and the filtering accuracy of the cloth bag is generally within 0.5-1um. The filtering accuracy of the filter cartridge can reach 0.2um at least. (2) the equipment maintenance is different. The maintenance of the filter cartridge is much easier than that of the cloth bag. Generally, if the dust removal equipment with the same air volume needs 1 day for the maintenance of the filter cartridge, the cloth bag needs at least 3 days.
静电除尘
Electrostatic precipitator
静电除尘器的工作原理是:含尘气体经过高压静电场时被电分离,尘粒与负离子结合带上负电后,趋向阳极表面放电而沉积。在冶金、化学等工业中用以净化气体或回收有用尘粒.利用静电场使气体电离从而使尘粒带电吸附到电极上的收尘方法.在强电场中空气分子被电离为正离子和电子,电子奔向正极过程中遇到尘粒,使尘粒带负电吸附到正极被收集.常用于以煤为燃料的工厂、电站,收集烟气中的煤灰和粉尘.冶金中用于收集锡、锌、铅、铝等的氧化物。并且静电除尘器的最高过滤静电能达到0.02um,受温达400~500摄氏度。这2点一直是布袋与滤筒不可及的地方。
The working principle of electrostatic precipitator is: the dust containing gas is separated by electricity when passing through the high-voltage electrostatic field, the dust particles and negative ions combine with negative electricity, and tend to discharge on the anode surface and deposit. In metallurgy, chemistry and other industries, it is used to purify gas or recover useful dust particles. It is a dust collection method that uses electrostatic field to ionize gas so that dust particles can be charged and adsorbed on the electrode. In strong electric field, air molecules are ionized into positive ions and electrons. When electrons rush to the positive electrode, they encounter dust particles, so that dust particles can be negatively adsorbed on the positive electrode and collected. It is commonly used in factories and power stations that use coal as fuel to collect smoke Coal ash and dust in gas. Used in metallurgy to collect oxides of tin, zinc, lead, aluminum, etc. In addition, the highest electrostatic filtering capacity of the electrostatic precipitator is 0.02um, and the temperature is 400-500 ℃. These two points are always out of reach of the bag and the filter.