A new fixed-bed reactor for producing chlorine by catalytic oxidation of hydrogen chloride

Abstract

The invention relates to a novel fixed bed reactor for preparing chlorine gas through catalytic oxidation of hydrogen chloride; a reactor cylinder body is divided into multiple layers by supporting sieve plates in the axial direction; each layer of the sieve plate is filled with a catalyst, and each layer of catalyst is internally provided with a plurality of groups of heat exchange tubes for supplying or removing reactor internal heat to ensure that the reaction temperature is in a required range; a side face feed distributor is mounted in a manner of clinging to the lower part of each sieve plate. By adjusting the side face feeding quantity, the catalytic activity of each layer of catalyst is guaranteed; the lower parts of the sieve plates and the side face feed distributors are fixed by round support rings to ensure that side face feeding has enough space for evenly mixing. The reactor can effectively uniformly remove heat generated by a catalytic reaction, enhances the heat and mass transfer efficiency, reduces the flow resistance, achieves a good temperature control effect, and makes full use of the reactor space to disperse reaction materials to the largest extent; and with multi-bed-layer feeding, the service life of the catalyst is extended, besides, the equipment investment is reduced, and the production cost is saved.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment, and in particular relates to a novel fixed-bed reactor used for catalytic oxidation of hydrogen chloride to prepare chlorine gas. Background technique [0002] Since Deacon (1886) invented the hydrogen chloride catalytic oxidation process to produce chlorine, two major engineering issues surrounding the process: the development of durable catalysts and the design of high-performance reactors have been continuously explored and improved. In terms of the reactor, since the hydrogen chloride catalyzed oxygen process is a strong exothermic reaction, the reaction medium in the reactor is highly corrosive to the reactor under high temperature conditions, so the requirements for the material and operating conditions of the reactor are relatively strict. In addition, the effective removal of reaction heat and the control of the reactor temperature also put forward high requirements on the stru...

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Problems solved by technology

However, the reactor failed to conduct timely and effective heat transfer treatment for the heat generated by the reaction, which could easily lead to excessive local temperature of the catalyst and deactivation

In addition, this patent does not give further consideration to the possibility of secondary corrosion of the reaction medium penetrating from the lining layer to the metal reactor wall

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