Radial fixed bed oxidative dehydrogenation reactor for regenerating catalyst by sections

Abstract

The invention relates to a radial fixed bed oxidative dehydrogenation reactor for regenerating a catalyst by sections and belongs to the field of chemical manufacturing equipment. A reaction gas outlet of a 1# reactor is connected with a reaction gas inlet of a 2# reactor through a pipeline. The radial fixed bed oxidative dehydrogenation reactor is characterized in that each one of the 1# reactor and the 2# reactor is a bearing shell formed by a cylindrical body, an upper end socket and a lower end socket; each bearing shell is internally provided with a catalyst inner cylinder and a catalyst outer cylinder, which are concentric and are formed by an opening cylinder and a Johnson net; the catalyst is filled into an annular space between the catalyst inner cylinder and the catalyst outer cylinder; and the part of the Johnson net is filled with an inert magnetic ball. A plurality of annular plates are arranged between the catalyst outer cylinder and the catalyst inner cylinder and a space between the catalyst outer cylinder and the catalyst inner cylinder is divided into a plurality of sections; and each section of the 1# reactor is provided with a material inlet and each section of the 2# reactor is provided with a reaction gas inlet and a regenerated gas inlet. The radial fixed bed oxidative dehydrogenation reactor for regenerating the catalyst by sections disclosed by the invention realizes the aim of carrying out an oxidative dehydrogenation reaction and catalyst regeneration at the same time in an online manner.

Description

technical field [0001] The invention relates to a radial fixed-bed oxidative dehydrogenation reactor with segmented online catalyst regeneration, belonging to the field of chemical production equipment. Background technique [0002] Butadiene is an important raw material for the production of synthetic rubber, and the production of butadiene by oxidative dehydrogenation of butene-1 is an important means of producing butadiene. Proportionally mixed steam, air and butene-1, under the action of suitable temperature and catalyst, oxidative dehydrogenation reaction occurs to generate butadiene and release a lot of heat energy at the same time. [0003] In the production device for producing butadiene by oxidative dehydrogenation of butene-1, the reaction unit usually sets several production lines according to the production scale of the device, with a capacity of about 20,000 tons per production line, and each production line is equipped with two axial fixed bed reactor. The mi...

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Problems solved by technology

[0004] Under the reaction conditions, the hydrocarbons in the gas are likely to generate coke on the surface of the catalyst due to side reactions such as cracking, which reduces the activity of the catalyst, resulting in a decrease in conversion rate and selectivity, a decrease in the production capacity of the device and an increase in energy consumption. The catalyst is burned and regenerated every 1 to 3 months

Not only seriously affect the economic benefits of the device, but also cause fluctuations in the subsequent refining and other production unit operations

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