Formaldehyde oxidation reactor

Abstract

The invention discloses a formaldehyde oxidation reactor comprising: a cover; an oxidation device main barrel connected with the cover, in which a catalyst layer for performing oxidation dehydrogenation rection and generating formaldehyde gas is arranged; and a device connected with the oxidation device main barrel to output generated formaldehyde gas. The reactor is characterized in that, the cover comprises: a heat insulation jacket composed of an inner barrel and an outer barrel which are sealing-connected, a heating interlayer formed between the inner barrel and the outher barrel; a quaternary mixture gas inlet from the heat insulation jacket into the cover; and a distribution wimble for equably distributing the quaternary mixture gas from the quaternary mixture gas inlet on the surface of the catalyst layer, wherein the lower end of the distribution wimble is fixed on the inner wall of the inner barrel. Because the temperature in the cover is improved by heating the heat insulation jacket, the effect of the condensate liquid of the quaternary mixture gas on the catalyst can be eliminated.

Description

technical field [0001] The invention relates to a formaldehyde oxidation reactor, in particular to a formaldehyde oxidation reactor which can eliminate the influence of the condensation of the quaternary mixed gas on the catalyst. Background technique [0002] The formaldehyde oxidation reactor is the key equipment for formaldehyde production, its quality will be directly related to the quality of the product and affect the improvement of economic benefits. The main function of the oxidizer is to oxidize and dehydrogenate methanol to generate formaldehyde gas, recover the heat of the reaction gas and cool the reaction gas. [0003] At present, domestic formaldehyde reactors mainly have two-stage and three-stage structures. The two-stage oxidation reactor is composed of upper and lower parts. The upper part is the reaction section. When the ternary mixed gas of methanol, air and water vapor enters the catalyst layer heated by the electric furnace, oxidative dehydrogenation r...

AI Technical Summary

Problems solved by technology

The two-stage oxidation reactor is composed of upper and lower parts. The upper part is the reaction section. When the ternary mixed gas of methanol, air and water vapor enters the catalyst layer heated by the electric furnace, oxidative dehydrogenation reaction occurs to generate formaldehyde gas; The lower part is the cooling section, where the high-temperature mixed gas generated by the reaction is cooled and sent out by the cooling water, and the cooling water is discharged under normal pressure. Although the purpose of cooling is achieved, the waste heat of the process is not utilized, wasting a lot of heat energy and consuming lots of cooling water

This structure makes the pure copper rod 110 not in contact with the inner wall of the heat exchange tube 104 at any time, so that the formaldehyde gas can circulate, thus reducing the heat exchange efficiency, and the solid copper rod also increases the cost

[0009] In addition, because the oxidation chamber 112 that generates formaldehyde gas is provided with components such as the quaternary mixed gas inlet 108, the catalyst layer 107 must be kept away from the top cover. Therefore, when replacing the catalyst, the head must be removed first, and then the operator passes through the ladder. Enter the oxidation chamber to pave the catalyst, which makes it very inconvenient to replace the catalyst

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