A combined heat exchange type multi-shell side methanol-to-olefins fixed-bed production equipment and production method thereof

Abstract

Belonging to the technical field of olefin production, the invention relates to combined heat exchange type multi-shell side methanol-to-olefin fixed bed production equipment and a production method thereof, thereby solving the technical problems of complex reaction equipment and difficult control of heat transfer in existing fixed bed reactors. The invention firstly puts forward the combined at exchange type multi-shell side methanol-to-olefin fixed bed production equipment, which includes a main reactor. Partition plates are mounted between an upper tube plate and a lower tube plate of the main reactor, and divide the cavity surrounded by the upper tube plate, the lower tube plate and the reactor body into 2-10 heat exchange shell sides that are not communicated to each other. The heat exchange shell sides include a first heat exchange shell side and the rest heat exchange shell sides, and column tubes run through the partition plates. The reactor body of each heat exchange shell side is provided with a cooling medium inlet and a cooling medium outlet. The invention also provides a method for production of olefin by the equipment. By means of combined high efficiency heat exchange, the proportion of water vapor in the feed gas and the load of a feed gas heating furnace can be reduced.

Description

technical field [0001] The invention relates to the technical field of producing propylene, C4 olefins and gasoline from methanol or dimethyl ether, in particular to a method and equipment for producing olefins such as propylene from methanol in a non-adiabatic, temperature-controllable fixed-bed reactor. Background technique [0002] Ethylene and propylene are basic organic chemical raw materials in great demand, mainly derived from petroleum processing. With the increasing scarcity of petroleum resources, the development of technology to produce propylene from non-petroleum resources such as coal or natural gas has attracted more and more attention at home and abroad. It is a mature process technology to produce synthesis gas from coal or natural gas, and then to produce methanol or dimethyl ether from the synthesis gas. Therefore, the preparation of ethylene and propylene from methanol or dimethyl ether is a key technology for coal-to-olefins. [0003] The process of pr...

AI Technical Summary

Problems solved by technology

[0012] In order to solve the technical problem that the existing fixed bed reactor adopts rapid cooling of raw materials or tubular molten salt to control the reaction temperature, resulting in complicated reaction equipment and difficulty in controlling the heat transfer of the reaction, the present invention provides a combined heat exchange multi-shell process for methanol production Olefin fixed bed production equipment, its technical scheme is as follows:

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