Apparatus and method for producing lightweight aromatic hydrocarbons from acetylene in order to realize reaction regeneration

Abstract

The present invention relates to a method and device for producing light aromatics from acetylene to realize reaction regeneration. The method includes a light aromatics production process and a catalyst regeneration process. The latter is carried out after the former is carried out continuously for a period of time, and the former is repeated after the latter is finished. , where the former includes passing the reaction gas into the reaction sleeve, passing through the preheating zone, thermal reaction zone, heat storage zone, catalytic reaction zone and cooling zone in sequence, the reaction gas is heated up to the thermal reaction temperature in the preheating zone, and then The thermal reaction occurs in the thermal reaction zone, and the product after the thermal reaction cools down to the catalytic reaction temperature in the heat storage zone, and the catalytic reaction takes place in the catalytic reaction zone to obtain light aromatics, which are cooled in the cooling zone; Nitrogen is introduced into the casing for purging, then water vapor is introduced to react with carbon deposition, and finally hydrogen is introduced to reduce the catalyst. The device implements the method described above. The invention solves the problem of carbon deposition in the acetylene reaction process, and realizes on-line regeneration without shutting down the device when there is too much carbon deposition.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and more specifically relates to a device and method for producing light aromatics from acetylene to realize reaction regeneration. Background technique [0002] Light aromatics such as benzene, toluene and xylene are one of the most important basic chemical raw materials, widely used in the production of chemical products such as rubber, fiber, plastic and dyes. At present, aromatics mainly come from catalytic reforming and hydrocarbon pyrolysis in petrochemical industry, but petroleum resources are becoming increasingly scarce. Therefore, it is imperative to develop other routes to produce light aromatics. [0003] my country's energy structure is rich in coal, low in oil, and poor in gas. In 2015, coal accounted for 63.8% of the primary energy consumption. From the perspective of national energy security, the energy and chemical industry with coal as raw material should be developed...

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is mainly to solve the problems of lack of petroleum resources and increasing demand for aromatics, and to provide a device for producing light aromatics from acetylene that couples thermal reaction and catalytic reaction and can remove carbon deposits on-line. and methods

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