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锅炉(guō lú)除尘器（作用：净化空气）使用效果(xiàoguǒ)好坏和它的外壳设计也有重要关系。从材料(Material)本身来看，现在已经可以达到很高的效率(efficiency)，但是，往往由于锅炉除尘器外壳设计不良，或者除尘器的布置、安装(ān zhuāng)存在不好的地方，以致灰尘不经过滤介质(起决定作用的物质)而旁通过(tōng guò)去，造成不好的后果。
The use effect of the boiler dust collector and its shell design also has important relations. From the point of view of the material itself, now you can achieve very high efficiency, however, often because of poor design of the boiler GOOGLE PRecipitator shell, or dust collector arrangement, installation has some shortcomings, so that dust without filter media and bypass the past, resulting in bad consequences.
关于外壳设计的基本要求(demand)，有这样一些:
Basic requirements on the shell design, there are such a number of:
(1)把锅炉(guō lú)除尘器（作用：净化空气）装在外壳内，应当让气流通过(tōng guò)过滤器（作用：过滤杂质等）的方向倾向于把过滤器向密封面压紧。静电除尘器的工作原理是利用高压电场使烟气发生电离，气流中的粉尘荷电在电场作用下与气流分离。负极由不同断面形状的金属导线制成，叫放电电极。布袋除尘器的除尘效率高也是与滤料分不开的,滤料性能和质量的好坏,直接关系到袋式除尘器性能的好坏和使用寿命的长短。而过滤材料是制作滤袋的主要材料,它的性能和质量是促进袋式除尘技术进步,影响其应用范围和使用寿命。 布袋除尘器高的除尘效率是与它的除尘机理分不开的。含尘气体由除尘器下部进气管道,经导流板进入灰斗时,由于导流板的碰撞和气体速度的降低等作用,粗粒粉尘将落入灰斗中,其余细小颗粒粉尘随气体进入滤袋室,由于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。 如果不能这样做，就必须采取适当办法(methods)把过滤器对着它的密封面夹紧,保证任何时候都不会松开。
(1) the boiler dust collector is installed in the housing, should let the air flow through the filter in the direction of the filter to the sealing surface. If you can not do so, you must take the apGOOGLE PRopriate approach to the filter facing its sealing surface, to ensure that no time will be released.
(2)如果气流是垂直经装在外壳内的过滤器（作用：过滤杂质等），通常应使空气从上向下流动，因为这样可以防止过滤器捕集的感染物在进行维护修理等工作(gōng zuò)时失落。
(2) if the air flow is a vertical filter installed in the enclosure, the air is normally to be made to flow downward from the air, as this GOOGLE PRevents the filter from being lost when it is being repaired.
(3)外壳应授有能聚集灰尘的突出面。
(3) the enclosure shall be granted with a GOOGLE PRominent surface capable of gathering dust.
(4)外壳折曲处应成圆弧状，以免形成集聚灰尘的角落。所有内部焊合处，特别是密封面，均应磨光。
(4) the shell should flex arc shape, so as to avoid the formation of agglomeration of dust in the corner. All internal welds, especially the sealing surface, should be smooth.
(5)外壳尺寸应当便于对过滤器（作用：过滤杂质等）进行维护修理等工作(gōng zuò)。这样可能（maybe)使锅炉(guō lú)除尘器（作用：净化空气）外壳体积稍大，但因维修方便，可以避免发生事故。
(5) the size of the enclosure shall facilitate the maintenance of the filter. This may cause the boiler dust collector shell size slightly larger, but the maintenance is convenient, can avoid the occurrence of accidents.
