Axial radial HPPO fixed bed reactor

Abstract

The invention discloses an axial radial HPPO fixed bed reactor which comprises a shell (1); the upper end socket of the shell is provided with a material inlet pipe (2); the lower end socket of the shell is provided with a material outlet pipe (3); the shell comprises n radial flow catalyst bed layers (4), n is an integer of 2 or more than 2; each radial flow catalyst bed layer is provided with anouter cylinder body (5) and an inner cylinder body (6); a central heat exchange cylinder (9) is arranged in the center of the inner cylinder body; a mixing device (12) is arranged at an outlet of thecentral heat exchange cylinder; a central pipe (7) is arranged in the central heat exchange cylinder; the upper part of the central pipe is higher than the radial flow catalyst bed layer; the part, higher than the radial flow catalyst bed layer, of the upper part of the central pipe is provided with a premixing device (10); each radial flow catalyst bed layer is connected with a drainage tube (11); and the drainage tube is connected with the premixing device at the upper part of the central pipe. According to the invention, the temperature distribution of the reactor is uniform, the heat exchange efficiency is high, the operation is fast, the occupied area is small, and the amplification is easy.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to an axial radial HPPO fixed bed reactor. Background technique [0002] Propylene oxide is the second largest category of propylene derivatives next to polypropylene. The current domestic production methods of propylene oxide include: chlorohydrin method, co-oxidation method, and hydrogen peroxide direct oxidation method (HPPO method). The production of propylene oxide by the chlorohydrin method and the co-oxidation method has the disadvantages of long process, high equipment cost, and large environmental pollution. The HPPO method uses hydrogen peroxide to catalyze the oxidation of propylene to synthesize propylene oxide under the action of a titanium-silicon molecular sieve catalyst. The process is simple, the conditions are mild, basically no pollution, and the product is single. It is currently recognized as the most environmentally friendly producti...

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems in the prior art such as uneven loading of the catalyst, the need to use a large amount of cooling water to remove the heat of reaction, uneven reaction temperature, inflexible means of temperature control, etc.

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