Fixed bed reactor and method for hydrogenation of unsaturated light hydrocarbons

Abstract

The invention relates to a fixed bed reactor and a method for hydrogenating unsaturated light hydrocarbons. The fixed bed reactor provided by the present invention includes a reactor barrel, a catalyst support structure, which is arranged in the reactor barrel, a heat exchange tube, and the heat exchange tube has a first nozzle and a second nozzle, the A first nozzle is provided on or outside the reactor barrel and below the catalyst support structure, and the second nozzle is provided inside the reactor barrel and above The catalyst support structure; the material inlet, which is arranged at the top of the reactor barrel, and the product outlet, which is arranged at the bottom of the reactor barrel. The method for hydrogenating unsaturated light hydrocarbons by using the fixed bed reactor of the present invention has the advantages of less circulating flow in the reaction system, effective control of catalyst bed temperature, and improved product quality.

Description

technical field [0001] The present invention relates to a fixed bed reactor. The present 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 the injection of a large amount of hydrogen to meet the needs. 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 cold hydrogen in addition to the hydrogen normally required for the hydrogenation reaction, which increases the investment and energy consumption of the d...

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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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