在机械加工、打磨、抛丸、喷砂、焊接这些车间里，粉尘是绕不开的伴生物。很多企业上了除尘设备，但车间里该呛还是呛，该灰还是灰。问题往往不在除尘器本身，而在于整个车间的气流组织和尘源控制没做对。车间整体除尘，是一套系统工程，不是买一台机器往角落一放就完事。

In workshops such as machining, polishing, shot blasting, sandblasting, and welding, dust is an unavoidable byproduct. Many companies have installed dust removal equipment, but whether it's in the workshop or not, it's still dust. The problem often lies not in the dust collector itself, but in the inadequate airflow organization and dust source control throughout the workshop. The overall dust removal in the workshop is a systematic project, not just buying a machine and placing it in the corner.

一、先搞清粉尘从哪来、往哪跑

1、 First, clarify where the dust comes from and goes

车间粉尘分两大类：有组织排放和无组织排放。有组织排放指打磨机、抛丸机、喷砂房这些设备自带排风口的，接管道抽走就行；无组织排放是焊接烟尘、切割粉尘、物料转运扬尘，在车间里自由扩散，最难治。整体除尘的核心思路是：在尘源处就近捕集，不让粉尘扩散到整个车间空间。如果只在车间顶部装几个大风机往外抽，粉尘早就在工人呼吸带弥漫开了，抽走的只是稀释后的空气，效果有限。

Workshop dust is divided into two categories: organized emissions and unorganized emissions. Organized emissions refer to equipment such as polishing machines, shot blasting machines, and sandblasting rooms that come with their own exhaust vents, which can be extracted through pipelines; Unorganized emissions refer to welding fumes, cutting dust, and material transportation dust, which freely diffuse in the workshop and are the most difficult to treat. The core idea of overall dust removal is to capture dust near the dust source and prevent it from spreading throughout the entire workshop space. If only a few large fans were installed at the top of the workshop to extract dust, the dust would have already spread through the workers' breathing belts, and only diluted air would be extracted, with limited effectiveness.

二、尘源捕集罩的设计是关键

2、 The design of dust source capture hood is key

同一台打磨机，捕集罩装对了，粉尘刚产生就被吸走；装错了，吸力再大也白搭。密闭罩适合产尘点固定的设备，把尘源整个包起来，用料省、效果好；半密闭罩适合需要人工操作的工位，留出操作口，用侧吸或下吸把粉尘带走；吹吸式罩适合大面积敞开式工位，一侧吹一侧吸，形成气幕把粉尘拦住。捕集罩的位置、角度、风量要按产尘特性设计，距离尘源越近越好，控制风速一般要保证在0.5到1.5米每秒。这些参数不是凭经验估的，要现场测。

On the same polishing machine, if the capture cover is installed correctly, the dust will be sucked away as soon as it is generated; Wrong installation, no matter how strong the suction is, it's useless. A sealed cover is suitable for equipment with fixed dust production points, covering the entire dust source, saving materials and achieving good results; A semi closed cover is suitable for workstations that require manual operation, leaving an operating port and using side suction or downward suction to remove dust; Blow suction hood is suitable for large-area open workstations, blowing on one side and sucking on the other, forming an air curtain to block dust. The position, angle, and air volume of the capture hood should be designed according to the characteristics of dust production, and the closer it is to the dust source, the better. The wind speed should generally be controlled at 0.5 to 1.5 meters per second. These parameters are not estimated based on experience, they need to be measured on site.

三、管道系统决定能耗和效果

3、 The pipeline system determines energy consumption and efficiency

管道是把捕集罩和除尘器连起来的血管。管道设计不合理，前端吸不动、后端阻力大，风机选再大也没用。几个原则：尽量缩短管道长度，减少弯头，弯头越多阻力越大；分支管道要做平衡，否则离风机近的吸力大、远的吸不动，需要加调节阀或做变径设计；管道风速要控制，太低了粉尘沉积堵管，太高了磨损和能耗都上去了，一般含尘管道风速在16到20米每秒。管道材质要根据粉尘磨蚀性选择，磨损大的用耐磨衬板。

A pipeline is a blood vessel that connects a capture hood and a dust collector. The pipeline design is unreasonable, with no suction at the front end and high resistance at the back end. Choosing a larger fan is useless. Several principles: try to shorten the length of the pipeline as much as possible, reduce bends, and the more bends there are, the greater the resistance; The branch pipeline needs to be balanced, otherwise the suction near the fan will be strong and the suction far away will not move, requiring the addition of regulating valves or variable diameter design; The wind speed of the pipeline needs to be controlled. If it is too low, dust deposition will block the pipeline, and if it is too high, wear and energy consumption will increase. Generally, the wind speed of dusty pipelines is between 16 and 20 meters per second. The material of the pipeline should be selected based on the dust abrasion resistance, and wear-resistant lining plates should be used for those with high wear.

四、除尘器选型看粉尘特性

4、 Selection of dust collector based on dust characteristics

布袋除尘器是车间除尘的主力，适合大多数干燥粉尘，过滤精度高，但怕潮湿、怕粘性粉尘、怕火星。滤筒除尘器体积小、过滤面积大，适合焊接烟尘和打磨粉尘，但滤筒寿命受清灰方式影响大。湿式除尘器适合易燃易爆粉尘，比如铝镁粉尘，用水做介质消除爆炸风险，但会产生泥浆需要处理。旋风除尘器通常做预分离，处理粗颗粒，减轻后端布袋负荷。选哪种要看粉尘的粒径、湿度、粘性、可燃性，不能一刀切。

Bag filter is the main force for workshop dust removal, suitable for most dry dust, with high filtration accuracy, but afraid of moisture, sticky dust, and sparks. The filter cartridge dust collector has a small volume and a large filtering area, making it suitable for welding and grinding dust. However, the lifespan of the filter cartridge is greatly affected by the cleaning method. Wet dust collectors are suitable for flammable and explosive dust, such as aluminum and magnesium dust. Water is used as a medium to eliminate the risk of explosion, but it may produce mud that needs to be treated. Cyclone dust collectors are usually used for pre separation, processing coarse particles, and reducing the load on the rear bag. The choice depends on the particle size, humidity, viscosity, and flammability of the dust, and cannot be a one size fits all approach.

五、整体除尘还要考虑车间通风和防爆

5、 Overall dust removal also needs to consider workshop ventilation and explosion prevention

除尘系统抽走的不只是粉尘，还有车间空气。如果只抽不补，车间会形成负压，门都拉不开，还会影响燃烧设备正常运行。需要设计补风系统，补风量一般要达到排风量的70%到80%。另外，处理可燃性粉尘时，除尘器和管道必须做防爆设计：泄爆片、隔爆阀、火花探测熄灭装置、防静电接地，这些一个都不能少。铝镁粉尘、粮食粉尘、木粉这些都有爆炸风险，不能按普通粉尘处理。

The dust removal system not only extracts dust, but also workshop air. If only pumping is not replenished, negative pressure will form in the workshop, doors will not open, and it will also affect the normal operation of combustion equipment. A supplementary air system needs to be designed, with the supplementary air volume generally reaching 70% to 80% of the exhaust air volume. In addition, when dealing with combustible dust, the dust collector and pipeline must have explosion-proof design: explosion-proof plates, explosion-proof valves, spark detection and extinguishing devices, and anti-static grounding, all of which cannot be omitted. Aluminum magnesium dust, grain dust, and wood powder all have explosion risks and cannot be treated as ordinary dust.

六、验收看效果，不看参数表

6、 Acceptance check the effect, not the parameter table

车间整体除尘的效果，最终看两个指标：车间空气含尘浓度是否达标，工人呼吸带粉尘浓度是否在职业健康限值以内。验收时要实际检测，不能只看设备铭牌上的处理风量。运行一段时间后还要复测，因为滤袋会堵塞、管道会积灰、风机性能会衰减。选厂家时，重点看有没有同类车间的整体设计经验，能不能做气流模拟和现场检测，售后能不能定期回访维护。

The overall dust removal effect of the workshop ultimately depends on two indicators: whether the dust concentration in the workshop air meets the standard, and whether the dust concentration in the worker's breathing zone is within the occupational health limit. During acceptance, actual testing should be conducted, not just based on the processing air volume indicated on the equipment nameplate. After running for a period of time, retesting is necessary because filter bags may become clogged, pipelines may accumulate dust, and fan performance may deteriorate. When choosing a manufacturer, it is important to consider whether there is overall design experience in similar workshops, whether airflow simulation and on-site testing can be conducted, and whether regular after-sales maintenance can be carried out.

车间整体除尘的本质，是把粉尘控制在产生的位置，不让它扩散到工人呼吸的空间。捕集罩设计对、管道平衡好、除尘器选型匹配、补风和防爆做到位，这套系统才能真正管用。单靠一台除尘器解决不了车间粉尘问题，系统设计能力才是核心。

The essence of overall dust removal in the workshop is to control the dust at the generated location and prevent it from spreading to the space where workers breathe. Only when the design of the capture hood is correct, the pipeline balance is good, the selection and matching of dust collectors are appropriate, and the air supply and explosion prevention are in place, can this system truly work. Relying solely on a dust collector cannot solve the dust problem in the workshop, system design capability is the core.