Spray tower, also known as scrubber, is wet-type waste gas purification equipment. Neutralizing chemicals are sprayed from the spraying layers inside the tower. As waste gas flows upward through the spraying area, harmful gas and dust fully contact with liquid medicine and get purified via absorption and neutralization. Featuring simple structure, stable operation and convenient maintenance, it can treat acid-base waste gas, fume dust and odor. It is often matched with activated carbon adsorption box to form a complete waste gas treatment system, widely applied in chemical industry, spraying, feed processing, machinery manufacturing and other fields.