Acid mist emission may suffuse acid mist and acid gas in working environment and cause acid deposition in atmospheric environment after emission to the atmosphere. It not only cause production and life loss by endangering the health of workers and the residents living around the factory and corroding the equipment and precise instrument of the factory, but also cause harmful impact on the growth of crops and other flora and fauna. Therefore, while control of coal-fired flue gas and automobile exhaust is strengthened, it is urgently required to take effective measures to control the acid mist emission to contain acidification and acid rain in atmospheric environment.

It is mainly used for waste gas treatment of hard chrome, achieves zero emission of chrome-containing waste  water by dissolution, cooling, purification and physical principle.