Double-pipe reactor

Abstract

A sleeve pipe type reactor used as a miniature fixed-bed reactor in laboratory for evaluating the ordinary-pressure multi-phase catalytic reaction features its simple sleeve pipe structure, single washer with dual sealing effect, and use of three resistance wires to heat for constant temp.

Description

technical field [0001] The invention relates to a miniature fixed-bed reactor mainly used for evaluation of heterogeneous catalytic reactions under normal pressure in a laboratory, in particular to a casing reactor. Background technique [0002] In chemical production, more than 90% of product development is carried out under the action of catalysts, and most of the catalytic reactions are reversible exothermic reactions. Based on this, many domestic reports have been published on the design of the internal heat exchanger structure of the reactor to improve the conversion rate of the catalytic reaction, such as CN1104126A, CN1030027A, CN2290400Y, etc. These designs can theoretically increase the conversion rate of reversible exothermic catalytic reactions, but when applied to basic theoretical research in the laboratory, due to the small amount of catalyst used in the reaction evaluation process (hundreds of milligrams to several grams), and the frequent replacement of catal...

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Problems solved by technology

These designs can theoretically increase the conversion rate of reversible exothermic catalytic reactions, but when applied to basic theoretical research in the laboratory, due to the small amount of catalyst used in the reaction evaluation process (hundreds of milligrams to several grams), and the frequent replacement of catalysts, As a result, the temperature gradient of the fixed bed layer is large, the disassembly of the reaction tube and the replacement of the fixed bed layer are inconvenient, and it takes a lot of time; in addition, most of the existing laboratory catalytic reactors use single-tube reactors, and the usual method The flange seal at both ends of the reaction tube needs to be dismantled by tools, and the reaction tube is required to be longer than the height of the external heating furnace of the reaction tube. When disassembling the reaction tube, the joints at both ends of the reaction tube must be loosened to pull out the reaction tube, which is not only time-consuming, but also The reaction tube is too long, which requires high space requirements, and a certain stretching space needs to be reserved around the reactor. As a result, most catalytic reactors are heated by a single-section electric heating wire. This single-section heating leads to a narrow constant temperature section of the heating furnace, and the entire bed layer The temperature is not uniform and the experimental data is unreliable; based on the above problems in the laboratory application of the catalytic reactor, at the same time, the miniature fixed bed catalytic reactor is designed for the purpose of facilitating the disassembly of the reaction tube and the replacement of the fixed bed layer, and improving the work efficiency. evaluation system

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