With the continuous advancement of industrialization and urbanization, the dust and dirt pressure of ventilation pipelines in various industries is increasing, which increases the pressure of ventilation pipeline cleaning. Then, how should Jinan ventilation pipeline be cleaned? The cleaning process of ventilation pipeline mainly includes the following aspects.

　　一是对设备进行大修，清洗风管及进风口，检查风管连接是否可靠;阀门泄漏等。

　　One is to overhaul the equipment, clean the air duct and air intake, check whether the air duct connection is reliable, valve leakage, etc.

　　第二段清洗通风管道，清洗风机和进风口。在风管清洗过程中，严禁操作人员进入风管进行清洗工作。应使用清洗设备，有效地将管道内可见污染物输送到指定设备。

　　The second section cleans the ventilation duct, the fan and the air inlet. In the process of duct cleaning, operators are strictly forbidden to enter the duct for cleaning. Professional cleaning equipment should be used to effectively transport visible pollutants in pipelines to designated equipment.

　　后，清洗工作完成后，将拆卸的风口重新安装，注意管路的连接性，调整出气量;同时检查设备质量和通风道整体连接情况，确保通风道正常工作。还要注意制作详细的清洗记录，以便日常设备维护和下一步的清洗工作。

　　Finally, after the cleaning work is completed, the dismantled air outlets are re-installed, the connection of pipelines is noticed, and the air output is adjusted. At the same time, the quality of equipment and the overall connection of ventilation ducts are checked to ensure the normal operation of ventilation ducts. Also pay attention to the production of detailed cleaning records, in order to daily equipment maintenance and next cleaning work.

　　通过通风改善车间的空气环境。一方面，不符合卫生标准的污浊空气被排放到室外局部场所或整个车间;另一方面，新鲜空气或净化后符合卫生要求的空气进入房间。我们把前者称为排气，后者称为进气。

　　Improve the air environment of the workshop by ventilation. On the one hand, the polluted air which does not meet the hygienic standards is discharged into the outdoor local places or the whole workshop; on the other hand, fresh air or purified air which meets the hygienic requirements enters the room. We call the former exhaust and the latter intake.

　　济南局部通风管道中有害物质聚集的地方，设置了捕集器，有害物质，控制有害物质进入室内的扩散。这种通风方式称为局部排风。这是有效的气体和灰尘的通风方式。

　　In Jinan, where harmful substances accumulate in local ventilation pipelines, traps are set up to remove harmful substances and control the diffusion of harmful substances into indoors. This type of ventilation is called local exhaust. This is the most effective way of ventilating gas and dust.

　　局部排气系统由以下部分组成:

　　The local exhaust system consists of the following parts:

　　(1)部分排气罩

　　(1) Partial exhaust hood

　　部分排气罩用于捕捉害虫。其性能直接影响到局部排气系统的技术经济指标。局部排风罩性能好，如闭式排风罩，只要风量小，就能取得良好的工作效果。由于生产设备和操作的不同，排风罩的类型也不尽相同。

　　Part of the exhaust hood is used to catch pests. Its performance directly affects the technical and economic indicators of local exhaust system. Local exhaust hood has good performance, such as closed exhaust hood, as long as the air volume is small, it can achieve good results. Due to the different production equipment and operation, the types of exhaust hood are different.

　　(2)管道

　　(2) Pipeline

　　在通风系统中输送气体的管道称为风管。它们将系统中的各种设备或部件作为一个整体连接起来。为了提高系统的经济性，应合理选择管道内的气速，管道应短而直。风管通常由表面光滑的材料制成，如钢板、PVC板，有时还有混凝土、砖等。

　　The pipeline that conveys gas in the ventilation system is called air duct. They connect the various devices or components in the system as a whole. In order to improve the economy of the system, the gas velocity in the pipeline should be reasonably selected, and the pipeline should be short and straight. Air ducts are usually made of smooth surface materials, such as steel plate, PVC board, and sometimes concrete, brick, etc.

　　(3)除尘净化设备

　　(3) Dust removal and purification equipment

　　为了防止空气污染，当排放的空气中有害物质超过排放标准时，必须使用净化设备进行处理。在达到排放标准后，它将被排放到大气中。净化设备分为除尘器和有害气体净化装置。

　　In order to prevent air pollution, when the harmful substances discharged in the air exceed the emission standards, it is necessary to use purification equipment for treatment. After meeting the emission standards, it will be discharged into the atmosphere. Purification equipment is divided into dust collector and harmful gas purification device.

　　(4)风扇

　　(4) Fans

　　济南通风道风机以机械排风系统捕捉气流的动力。为了防止风机磨损和腐蚀，通常将其放置在清洗设备的后面。

　　Jinan ventilation duct fan captures the power of air flow with mechanical exhaust system. In order to prevent the fan from wearing and corrosion, it is usually placed behind the cleaning equipment.

　　如只在局部地方进行排风或送风，即局部通风;如果在整个车间进行排气或送风，则应充分通风。一般根据通风系统功能范围的不同，可将通风分为局部通风、综合通风和事故通风。局部通风系统分为局部进风和局部排风两大类。他们都使用当地的气流，使当地的工作场所免受有害物质的污染，创造一个良好的空气环境。

　　If only exhaust or supply air in local areas, that is, local ventilation; if exhaust or supply air in the whole workshop, it should be fully ventilated. Generally, according to the different functional range of ventilation system, ventilation can be divided into local ventilation, comprehensive ventilation and accident ventilation. Local ventilation system can be divided into two categories: local intake and local exhaust. They all use local airflow to protect local workplaces from harmful substances and create a good air environment.