With the increase in population and urbanization, coal and oil burning into the atmosphere of sulfur dioxide more and more, it is in the atmosphere and water vapor and oxygen mixture, the formation of sulfuric acid, acid rain. Acid rain is known as "air death", it has become the world's attention to the ecological system of environmental problems. To control the content of sulfur dioxide in the atmosphere is a problem that is working hard today. And the waste gas produced by acid washing contains a large amount of acid gas, which is a necessary measure to control the air pollution.
Effective control of air pollution by using absorption tower to deal with exhaust gas. Compared with the traditional plate tower, the packed tower has the advantages of large capacity, high separation efficiency, low pressure drop, flexible operation, small liquid holding capacity and so on. Especially in 1970s, because the new packing and the internals and the development and application of basic theory and the deepening of the study, the amplification effect of packed tower has made substantial breakthroughs, packing tower has a good application in chemical enterprises
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