The scrubber equipment is a new type of gas purification equipment. It is developed on the basis of the floating packing layer gas purifier, and is widely used in the pretreatment of industrial waste gas purification and dust removal, and the purification effect is very good. For the coal gasification process, gas washing is inevitable, and this unit operation is used regardless of the coal gasification technology. Because its working principle is similar to the washing process, it is named washing tower.

The scrubbing tower is similar to the rectification tower and consists of a tower body, trays, reboiler, and condenser. Since the scrubber is a device for rough separation, the number of trays is generally small, usually not more than ten stages. The scrubber is suitable for the separation of mixed gas containing a small amount of dust, the components will not react, and the product should be easy to liquefy, and impurities such as dust (also called high boilers) are not easy to liquefy or solidify. When the mixed gas passes into the scrubbing tower from the middle of the scrubbing tower, due to the presence of product component liquid between the trays, the product component gas is liquefied while evaporating part, and the impurities cannot be liquefied or solidified, when passing through the trays with liquid It will be fixed by the product component liquid to produce a washing effect. The washing tower is designed and manufactured according to this principle.