专注通风管道加工·排烟罩

　　Ventilation improves the air environment of the workshop. On the one hand, the polluted air which does not meet the hygienic standards is discharged outdoors in some places or the whole workshop. On the other hand, fresh air or purified air which meets the hygienic requirements is sent into the room. We call the former exhaust and the latter intake.

　　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，则为通风。通常，按通风系统的作用范围不同，可将通风分为局部通风、通风和事故通风。局部通风系统又分为局部进风和局部排风两大类，它们都是利用局部气流，使局部工作地点不受有害物的污染，造成良好的空气环境。

　　If ventilation or supply is only carried out at local locations, that is, local ventilation; if ventilation or supply is carried out throughout the workshop, it is full ventilation. Generally, ventilation can be divided into local ventilation, comprehensive ventilation and accident ventilation according to the different scope of action of the ventilation system. Local ventilation system can be divided into local air intake and local air exhaust. Both of them make use of local air flow to protect local working places from harmful pollutants and create a good air environment.

　　（一）局部排风

　　(1) Local exhaust

　　在集中产生有害物的局部地点，山东通风管道设置捕集装置，将有害物排走，以控制有害物向室内扩散，这种通风方法称为局部排风。这是防毒，排尘有效的通风方法。

　　In local places where harmful substances are concentrated, ventilation pipes in Shandong Province set up traps to remove harmful substances to control the indoor diffusion of harmful substances. This ventilation method is called local exhaust. This is the most effective ventilation method for anti-virus and dust removal.

　　山东通风管道

　　Shandong Ventilation Pipeline

　　局部排风系统由以下几部分组成：

　　The local exhaust system consists of the following parts:

　　（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。

　　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. Local exhaust hood with good performance, such as airtight hood, can achieve good working effect as long as the air volume is small. Due to the difference of production equipment and operation, the forms of exhaust hood are 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 pipeline that conveys gas in the ventilation system is called the air duct. It connects all kinds of equipment or components in the system into a whole. In order to improve the economy of the system, the gas velocity in the air duct should be selected reasonably, and the pipeline should be short and straight. Air ducts are usually made of smooth surface materials, such as thin steel plate, PVC board, and sometimes concrete, brick and other materials.

　　（3）除尘、净化设备

　　(3) Dust removal and purification equipment

　　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 amount of harmful substances in the discharged air exceeds the discharge standard, it must be treated with purification equipment, after meeting the discharge standard, discharging into the atmosphere. The purification equipment can be divided into two categories: dust collector and harmful gas purification device.

　　（4）风机

　　(4) Fans

　　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。

　　The fan captures the power of air flow from the mechanical exhaust system. In order to prevent the wear and corrosion of the fan, it is usually placed behind the purification equipment.