专注通风管道加工·排烟罩

1. Mechanical separation method

利用惯性碰撞原理或旋风分离原理对油烟进行分离。

The oil fume is separated by the principle of inertial collision or cyclone separation.

缺点：挡板滤网容易破裂，废弃直接排放；需要定期保养和维护；安装的垂直角度要小于15°；净化效率不高，只适用于预处理或净化效率要求较低的场合。

Disadvantages: the baffle filter screen is easy to break, and the waste is directly discharged; Need regular maintenance; The vertical angle of installation shall be less than 15 °; The purification efficiency is not high, and it is only applicable to the occasions with low requirements for pretreatment or purification efficiency.

2、织物过滤法

2. Fabric filtration method

油烟废气经过一定数目的金属格栅，大颗粒污染物被阻截；然后经过纤维垫等滤料后，颗粒物由于被扩散、截留而被脱除。通常选用的滤料材料为吸油性能高的高分子复合材料。这种设备投资少、运行费用低、无二次污染、维修管理方便；但阻力大、占地大、需要经常更换滤料的缺点。净化效率一般在80~92%。

The lampblack exhaust gas first passes through a certain number of metal grids, and large particulate pollutants are intercepted; Then, after passing through filter materials such as fiber mats, particles are removed due to diffusion and interception. The commonly selected filter material is polymer composite material with high oil absorption performance. The equipment has the advantages of less investment, low operation cost, no secondary pollution and convenient maintenance and management; However, it has the disadvantages of large resistance, large land occupation and frequent replacement of filter materials. The purification efficiency is generally 80~92%.

缺点：由于滤料阻力很大，如玻璃纤维滤料的净化器压降可达1500Pa，且滤料需经常更换，使过滤法净化设备的应用受到局限。

Disadvantages: due to the large resistance of filter material, such as the pressure drop of glass fiber filter material purifier can reach 1500Pa, and the filter material needs to be replaced frequently, the application of filtering purification equipment is limited.

3、催化剂燃烧法

3. Catalyst combustion method

燃烧净化法的原理是利用高温燃烧所产生的热量进行氧化反应，把油烟废气中的污染物质转化为CO2和H2O等物质，从而达到净化目的。在燃烧过程中，让油烟废气通过自净化催化剂，催化剂的催化反应有利于污染物的转化。一般采用陶瓷或金属蜂窝进行载体进行氧化催化。这类油烟净化设备只适用油烟浓度很低的场合，如食物生吃或制作半成品。

The principle of combustion purification method is to use the heat generated by high temperature combustion to carry out oxidation reaction, and convert the pollutants in the lampblack waste gas into CO2, H2O and other substances, so as to achieve the purification purpose. In the combustion process, let the lampblack exhaust gas pass through the self purification catalyst, and the catalytic reaction of the catalyst is conducive to the transformation of pollutants. Generally, ceramic or metal honeycomb is used as the carrier for oxidation catalysis. This kind of lampblack purification equipment is only applicable to occasions with low lampblack concentration, such as raw food or semi-finished products.

缺点：催化燃烧净化设备的开发还不十分成熟。

Disadvantages: The development of catalytic combustion purification equipment is not very mature.

4、湿式处理法

4. Wet process

采用水或其他洗涤剂，以喷头喷洒的方式形成水膜，水雾来吸收油烟。油烟粒子与喷嘴喷出的水雾、水膜相接触，经过相互的惯性碰撞、滞留、细微颗粒的扩散和相互凝聚等作用，随水滴流下，从而使油烟离子从气流中分离出来。这种设备结构简单、投资少、占地小、运行费用低、维修管理方便。

Water or other detergents are used to form a water film by spraying the nozzle, and water mist is used to absorb oil smoke. The soot particles contact with the water mist and water film ejected from the nozzle, and flow down with the water droplets through mutual inertial collision, retention, diffusion and mutual condensation of fine particles, thus separating the soot ions from the air flow. The equipment has simple structure, less investment, small land occupation, low operation cost and convenient maintenance and management.

缺点：存在阻力大、对亚微米级颗粒物的净化率很低、产生油污水的二次污染。

Disadvantages: it has large resistance, low purification rate of submicron particles, and secondary pollution of oily sewage.

l 机械分离净化设备净化效率不高，只适用于预处理或净化效率要求较低的场合；

L The purification efficiency of mechanical separation and purification equipment is not high, and it is only suitable for pre-treatment or occasions with low purification efficiency requirements;

l 湿法洗涤净化设备对亚微米级颗粒物的净化率很低，还需要对产生的洗涤液进行处理；

L The purification rate of submicron particles by wet scrubbing and purification equipment is very low, and the washing solution generated needs to be treated;

l 过滤净化设备需净化更换滤料，能耗很大；活性炭吸附净化设备成本太高；

L The filtering and purification equipment needs to purify and replace the filter material, which consumes a lot of energy; The cost of activated carbon adsorption purification equipment is too high;

l 催化燃烧净化设备的开发还不十分成熟；

L The development of catalytic combustion purification equipment is not very mature;

l 静电法净化效率设备以其高净化效率、低压降、运行稳定、维护管理方便等特点越来越显示出他的优越性，目前市场占有率接近90%。

L Electrostatic purification efficiency equipment has shown its advantages with its high purification efficiency, low voltage drop, stable operation, convenient maintenance and management, and its market share is close to 90%.

5、活性炭吸附法

5. Activated carbon adsorption method

用粒状活性炭或活性炭纤维毡吸附油烟中的污染物粒子。这种设备的特点与过滤净化设备相似，但去除油烟异味分子的效果较好。

Granular activated carbon or activated carbon fiber felt is used to adsorb pollutant particles in lampblack. The characteristics of this equipment are similar to those of filtration and purification equipment, but the effect of removing oil smoke odor molecules is better.

缺点：活性炭成本较高。

Disadvantages: The cost of activated carbon is high.

6、静电处理法

6. Electrostatic treatment

电场在外加高压的作用下，负极的金属丝表面或附近放出电子迅速向正极运动，与气体分子碰撞并离子化。油烟废气通过这个高压电场时，油烟粒子在极短的时间内因碰撞俘获气体离子而导致荷电，受电场力作用向正极集尘板运动，从而达到分离效果。这种设备的投资少、占地小、无二次污染、运行费用低。由于易于捕捉粒径较小的粉尘，净化效率高，可达85~95%。它的净化机理与气体方法的区别在于：分离力是静电力，直接作用在粒子上，而不是作用在气流上，因此具有能耗低，阻力小的特点。

Under the action of the applied high voltage, electrons released from the metal wire surface of the negative electrode or nearby quickly move towards the positive electrode, collide with the gas molecules and ionize. When the lampblack waste gas passes through this high voltage electric field, the lampblack particles will be charged due to the collision and capture of gas ions in a very short time, and will move towards the positive dust collecting plate under the action of the electric field force, so as to achieve the separation effect. The equipment has the advantages of less investment, small land occupation, no secondary pollution and low operation cost. Because it is easy to capture dust with small particle size, the purification efficiency is high, up to 85~95%. Its purification mechanism is different from the gas method in that the separation force is electrostatic force, which directly acts on particles rather than on air flow, so it has the characteristics of low energy consumption and small resistance.