Ammonia synthesis reactor and ammonia synthesis technology

Abstract

The invention discloses an ammonia synthesis reactor and an ammonia synthesis technology. The ammonia synthesis reactor comprises an outer barrel and an inner barrel, wherein the inner barrel is separated into a plurality of sections of regions through sealing heads in the height direction; each section of region is internally correspondingly provided with a catalyst basket; heat exchange devicesare arranged in the catalyst basket in part of the regions; unreacted gas is heated so that reaction gas is cooled; a condition that a catalyst is deactivated is effectively avoided and the utilization period of the catalyst is long.

Description

technical field [0001] The invention relates to an ammonia synthesis reactor and an ammonia synthesis process, belonging to the field of ammonia synthesis. Background technique [0002] The reaction equation for the synthesis of ammonia is as follows: [0003] 3H 2 +N 2 →2NH 3 +Q [0004] The ammonia synthesis reaction is a reversible reaction, which is carried out in a reactor equipped with a catalyst. The catalyst activity has a certain temperature range, between 340°C and 520°C. Below 340°C, the reaction speed is very slow, and a large amount of catalyst is required, resulting in a high temperature in the reactor. Large size; higher than 520°C, the crystals in the catalyst will grow and the activity will decline. Generally, the designed operating temperature range of the catalyst is between 350°C and 510°C. [0005] At the same time, the ammonia synthesis reaction is still an exothermic reaction, so it is necessary to install a heat exchanger in the reactor to conti...

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Problems solved by technology

[0013] The three-stage reaction of the three-layer catalyst, equipped with two intercooling heat exchangers, occupies a large amount of internal space, and the catalyst is less loaded, which affects the increase in production capacity. Although the final ammonia content reaches 19.4%, the temperature in the first stage needs to be pulled to nearly 500 ° C. Catalyst is easy to age under this working condition

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