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通风管道的局部排风结构的组成原理

发布人:http://www。sftfgd。com   发布时间:2017-04-28 14:50:41

(1)局部排风罩

(1) local exhaust hood

局部排风罩是用来捕集有害物的。它的性能对局部排风系统的技术经济指标有直接影响。性能良好的局部排风罩,如密闭罩,只要较小的风量就可以获得良好的工作效果。由于生产设备和操作的不同,排风罩的形式是多种多样的。

The local exhaust hood is used to trap harmful substances。 Its performance has a direct impact on the technical and economic indicators of the local exhaust system。 Good performance of the local exhaust hood, such as airtight cover, as long as the smaller air volume can get good results。 Because of the difference of production equipment and operation, the exhaust hood is various。

(2)风管

(2) air duct

通风系统中输送气体的管道称为风管,它把系统中的各种设备或部件连成了一个整体。为了提高系统的经济性,应合理选定风管中的气体流速,管路应力求短、直。风管通常用表面光滑的材料制作,如:薄钢板、聚氯乙烯板,有时也用混凝土、砖等材料。

The duct of the air in the ventilation system is called an air duct, which connects the various devices or components into a whole. In order to improve the economy of the system, the gas flow velocity in the air duct should be selected reasonably. The wind pipe is usually made of a smooth surface material, such as: steel sheet, PVC board, and sometimes also with concrete, brick and other materials.

(3)除尘、净化设备

(3) dust removing and purifying equipment
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为了防止大气污染,当排出空气中有害物量超过排放标准时,必须用净化设备处理,达到排放标准后,排人大气。净化设备分除尘器和有害气体净化装置两类。

In order to prevent air pollution, when the discharge of harmful substances in the air exceeds the discharge standard, must be treated with purification equipment, to achieve emission standards, the exhaust air。 Purification equipment, dust collector and harmful gas purification device two。

(4)风机

(4) fan

风机向机械排风系统捉供空气流动的动力。为了防止风机的磨损和腐蚀,通常把它放在净化设备的后面。

Fan to the mechanical exhaust system to capture the power of air flow。 In order to prevent wear and corrosion of the fan, it is usually placed behind the purification equipment。

如果只对局部地点进行排风或送风,即局部通风;如果对整个车间进行排风或送风,则为全面通风。

If only the local location of the exhaust or air supply, that is, local ventilation; if the entire workshop for air or air supply, the overall ventilation。

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