Membrane type wall reactor

Abstract

The invention discloses a film wall reactor, which comprises a cylinder body, an upper end closure and a lower end closure. A film wall composed of a seamless steel pipe and a heat exchange fin and used for removing the heat generated in the reaction is arranged circularly in the cylinder body; cavities formed between every two film walls constitute dentate-sinuate cylindrical catalyst beds of various diameters; the catalyst beds are filled with catalysts; the upper end and the lower end of the film walls are respectively connected with an upper sub header and a lower sub header; an upper header is arranged between the upper sub header and an exhaust pipe positioned on the upper end closure; a lower header is arranged between the lower sub header and an inlet tube positioned on the lower end closure; the upper header and the lower header form a communicated assembly used for the flowing of the boiling water, i.e. the heat transfer medium; an insulating layer body is arranged at the upper position of the film wall in the cylinder body. The reactor is characterized by strong heat transfer ability, low running resistance, high gas conversion rate, small volume; besides, the reactor can reduce the manufacturing cost and prolong the service life. Therefore, the reactor is suitable for devices of synthesization, dehydration, condensation, decomposition and gas purification and so on.

Description

technical field [0001] The invention relates to a reactor in the chemical industry, in particular to a membrane wall reactor. Background technique [0002] The reactor is widely used as a common equipment in the chemical industry. During this period, people have made many improvements to the reactor in order to achieve better use effects. There have been fixed-bed catalytic reactors, shell-and-tube water cooling There are several types of reactors, adiabatic shell-and-tube water-cooled reactors, and radial-flow shell-and-tube water-cooled reactors. Low space utilization in the body, large running resistance, short equipment life, etc., for this reason, Chinese Patent No. ZL200620077859.3 discloses a radial baffle shell reactor, which includes an outer shell, a cold plate internal, A gas radial distribution cylinder and a radial gas collection cylinder are installed in the casing, and a radial baffle component composed of several baffle elements arranged at intervals is arra...

AI Technical Summary

Problems solved by technology

[0002] The reactor is widely used as a common equipment in the chemical industry. During this period, people have made many improvements to the reactor in order to achieve better use effects. There have been fixed-bed catalytic reactors, shell-and-tube water cooling There are several types of reactors, adiabatic shell-and-tube water-cooled reactors, and radial-flow shell-and-tube water-cooled reactors. Low space utilization in the body, large running resistance, short equipment life, etc., for this reason, Chinese Patent No. ZL200620077859.3 discloses a radial baffle shell reactor, which includes an outer shell, a cold plate internal, A gas radial distribution cylinder and a radial gas collection cylinder are installed in the casing, and a radial baffle component composed of several baffle elements arranged at intervals is arranged between the radial distribution cylinder and the radial gas collection cylinder. The reactor solves the problem of It solves the problems of high running resistance and poor heat transfer effect of the previous reactor, and improves the heat transfer coefficient of the gas side and water side at the same time, and the overall size is small. However, this radial baffle shell reactor also appears Some other problems were solved: (1) The inner part of the cold plate is separated from the shell, and the inner wall of the shell is all in contact with the high-temperature reaction gas, so that the shell should be made of high-temperature-resistant materials, resulting in increased manufacturing costs

(2) The heat exchange plates of the cold plate internals are all welded, the structure is complicated, there are many solder joints, the manufacturing quality is difficult to guarantee, and once a leak occurs, it cannot be repaired, and the service life of the equipment is short

(3) When the catalyst is converted from an oxidized state to a reduced state, the volume of the catalyst shrinks, causing the overall height of the catalyst to drop, and an empty space appears in the upper part. When flowing radially, the raw material gas easily goes to the upper empty space, and the raw material gas takes a shortcut, reducing the gas conversion rate

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