Synthetic converter for producing chloroethylene by synthetic reaction of ethyne and hydrogen chloride

Abstract

The invention relates to a production device for chemical products and specifically relates to a synthetic converter for producing chloroethylene by synthetic reaction of ethyne and hydrogen chloride. The synthetic converter is a tube type converter and can be used either alone or in series with another synthetic converter. The flow direction of feed gas can be adjusted to allow the feed gas to enter into the synthetic converter from a lower portion or an upper portion. Turbulence assemblies are provided in a reaction tube of the synthetic converter and can strengthen heat transfer process. Aradial temperature distribution in the reaction tube of the present synthetic converter is even and an axial temperature distribution in the reaction tube of the synthetic converter is smooth and controllable. Therefore, the synthetic converter overcomes the defects that a radial temperature distribution in a reaction tube of an existing synthetic converter is uneven and heat from a centre area of the reaction tube of the existing synthetic converter cannot be removed thus local overheating is formed to lead high temperature sublimation loss of catalysts, and has the advantages of extension of catalyst service life, improvement of conversion rate and flux of feed gas, high production efficiency and high operation flexibility.

Description

technical field [0001] The invention relates to a production device of chemical products, in particular to a synthesis converter for generating vinyl chloride by reacting acetylene and hydrogen chloride. technical background [0002] Acetylene reacts with hydrogen chloride to produce vinyl chloride. In the past, the synthesis reaction was carried out in a tube-and-tube synthesis converter composed of steel pipes with a certain inner diameter, and the tubes were filled with catalysts. The catalyst used is high mercury chloride with active carbon as the carrier. For this tube-and-tube synthesis converter, the heat transfer medium outside the tubes is boiling water, and the heat transfer coefficient is relatively large. However, because the tubes are filled with catalyst, the heat of reaction in the tubes is difficult to transfer to the outside of the tubes, making the reaction There is an obvious radial distribution of temperature along the cross-section of the tubes, an...

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Problems solved by technology

Due to the existence of radial temperature distribution and axial temperature distribution in the tubes, the temperature in the central area of ​​the axial high-temperature section in the tubes of the synthesis converter is too high, which causes the high mercury chloride adsorbed by the catalyst carrier activated carbon to sublimate and escape with the air flow, reducing Catalyst activity and service life are reduced, leading to reduced production capacity or frequent replacement of catalysts to increase production costs

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