Fixed bed reactor and unsaturated light hydrocarbon hydrogenation method

Abstract

The invention relates to a fixed bed reactor and an unsaturated light hydrocarbon hydrogenation method. The fixed bed reactor comprises: a reactor cylinder; a catalyst support structure arranged in the reactor cylinder body; a heat exchange tube provided with a first tube opening and a second tube opening, wherein the first tube opening is arranged on the reactor cylinder or outside the reactor cylinder and is lower than the catalyst support structure, and the second tube opening is arranged in the reactor cylinder and is higher than the catalyst support structure; a material inlet arranged atthe top of the reactor cylinder; and a product outlet arranged at the bottom of the reactor cylinder. The unsaturated light hydrocarbon hydrogenation method using the fixed bed reactor has the advantages of less internal circulation material flow of the reaction system, effective control of the temperature of a catalyst bed, and improvement of the product quality.

Description

Technical field [0001] The invention relates to a fixed bed reactor. The invention also relates to a method for hydrogenating unsaturated light hydrocarbons. Background technique [0002] Since the hydrogenation reaction is an exothermic reaction, there is a temperature rise in the catalyst bed. In order to effectively control the reaction temperature, the fixed bed hydrogenation reactor is usually divided into multiple beds for filling, and cold hydrogen is injected between the beds to reduce the catalyst bed. temperature. The specific heat of hydrogen is small, which requires a large amount of hydrogen to be injected to meet the demand. This cold hydrogen needs to be provided by the circulating hydrogen compressor in the device, which requires the circulating hydrogen compressor to provide this part of the cold hydrogen in addition to the hydrogen normally required for the hydrogenation reaction, which increases the investment and energy consumption of the device. . [0003] ...

AI Technical Summary

Problems solved by technology

In addition, due to the change of the raw material of the device and the temperature rise of the catalyst bed under different operating cycles, the amount of cold oil that needs to be injected varies greatly

The cold oil distributor is a fixed structure, the change of the amount of cold oil has a direct impact on the effect of the cold oil distributor, resulting in the inability to effectively control the reaction temperature

[0004] To sum up, although the traditional cold hydrogen temperature control method can effectively control the reaction temperature, the amount of cold hydrogen injected is large, which needs to increase the investment and energy consumption of the device; the use of cold oil temperature control method can reduce part of the investment of the device , but the change in the amount of cold oil injection leads to the inability to effectively control the reaction temperature

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