Modeling Of Catalitic Reactors Of Sulphur Dioxide Oxidation By Periodical Forced Reversal Of The Mixture Flow

Sulphuric acid is an essential chemical material. It plays an important role in many industries, such as, chemical fertilizer, pesticide, metallurgy, oil refining, organic synthesis and pharmacy, ect. 60 percent of the yield of sulphuric acid are used in producing phosphate fertilizer in our country. So the development and the technical progess of the sulphuric acid industry are of great significance to the development of the phosphate fertilizer industry. On the other hand, the output of the grain production has to be raised in difinite arable land to solve the problem of short supply of food caused by great growth of population in our country. This also demands to enlarge the production of the phosphate fertilizer. As a result, the development of the surphric acid industry must be accelerated.The traditional techniques of sulphuric acid production operate in steady state. The sulphur dioxide made from the sulphur or sulphur pyrite is converted into sulphur trioxide in one or more catalyst beds in a stationary converter. A higher concentration of sulphur dioxide (generally more than 5mol%) is requested in those techniques. Otherwise, the converter can not operate autothermally. However, the concentration of gases made from sulphur pyrite and effluent gases from non-ferrous metallurgy in our country is not so high. Evidently, if the traditional technique is used, the prosess will be complicated, the investment of the equipment will be great and the cost of the production will be high.