Fixed bed reaction device for methylamine synthesis, synthesis system and synthesis method

Abstract

The invention discloses a fixed bed reaction device for methylamine synthesis, a synthesis system and a synthesis method, the fixed bed reaction device comprises a tower body, a plurality of catalyst layers and a plurality of feed pipes, the plurality of catalyst layers are respectively arranged on cross sections of different heights of the tower body; the plurality of feeding pipes are arranged in parallel along the axial direction of the tower body and are uniformly distributed on the cross section of the tower body; the feeding end of the feeding pipe is arranged close to the bottom of the tower body, and the discharging end is arranged close to the top of the tower body; and the synthesis gas outlet of the tower body is positioned at the lower end of the tower body. The feeding pipe can more fully utilize reaction heat to heat raw material gas, the temperature of the raw material gas is increased through heat exchange, and the synthetic reaction of methylamine needs to be carried out at a certain temperature and pressure, so that after the temperature of the raw material gas is increased, the reaction can be fully catalyzed in the filler at the uppermost section, and the utilization rate of the catalyst in the synthetic fixed bed reaction device can be improved.

Description

technical field [0001] The invention belongs to the technical field of methylamine production, and in particular relates to a fixed-bed reaction device, a synthesis system and a synthesis method for synthesizing methylamine. Specifically, it uses a fixed-bed fixed-bed reaction device, and methanol and ammonia undergo amination reaction under the action of a catalyst to generate monomethylamine, dimethylamine and trimethylamine and a system. Background technique [0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Methylamine is an important chemical raw material, which is widely used in various sectors of the national economy. basic raw materials. There are many ways to produce methylamine, but the method commonly used at home and abroad is methanol gas-phase catalytic ammonification process, specifically using methanol and ammonia as raw materials, at a certain temperatu...

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Problems solved by technology

However, the inventors have found that when the above method is used to produce methylamine, a fixed-bed reaction device with a fixed bed is used, and the multi-layer catalyst beds are distributed in series, so there is a problem of uneven distribution of materials, which easily leads to low catalyst utilization efficiency and affects the fixed-bed reaction device. The reaction efficiency; and although the reaction is an exothermic reaction, the reaction needs to be carried out at a certain temperature, so the raw material gas needs to be preheated, which increases the energy consumption of the system

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