STUDY OF THE PROCESS OF OXIDATION OF SULFUR DIOXIDE IN A CONTACT APPARATUS IN THE PRODUCTION OF SULFURIC ACID

Abstract

Chemical production is a complex chemical technological system, the complexity of which is due to a variety of connections, elements and systems, as well as a variety of problems to be solved. The main purpose of chemical production is to obtain chemical products with desired properties in a small amount of raw materials and means. In order to provide the possibility of optimization and analysis of the chemical technological system, it is necessary, first, to create a process model that reflects the relationship between the elements and their impact on each other. One of the key steps in the manufacture of sulfuric acid is the oxidation of SO2 to SO3 in the contact apparatus on the layers of the vanadium catalyst. This stage limits all production and the overall performance of the system depends on the oxidation rate of SO₂. A special feature of this stage is the need to remove the heat of SO₂ oxidation by intermediate cooling of the gas after each catalyst bed. Therefore, the article presents the analysis of contact devices in the production of sulfuric acid with intermediate or internal heat exchange. For the oxidation of sulfur dioxide shows a contact device with external heat exchangers, consisting of five layers. This makes it possible to regulate the temperature regime and the possibility of using the reaction heat in heat exchangers.