Gas-liquid-solid three-phase reactor and applications thereof

Abstract

A reactor adopting gas-liquid-solid three phases as reaction materials is applicable for gas-liquid-solid three-phase reactions with a temperature of 0-400 DEG C and a pressure of 0-30.0 MPa. The reactor has characteristics of excellent hydrodynamics performance and high mass transfer efficiency, and can be used for an ethylenediamine preparation reaction adopting ethanolamine and ammonia as raw materials under a hydrogen present condition.

Description

technical field [0001] The invention relates to the field of chemical engineering equipment, in particular to a reactor in which reaction materials are gas-liquid-solid three-phase. Background technique [0002] Gas-liquid-solid three-phase reactors are widely used in the fields of chemical industry, energy, environment and biochemistry. Usually for gas-liquid-solid three-phase reaction, trickle bed or trickle bed reactor, mechanical stirred tank reactor, bubble column (baffle bubble column), rotary drum reactor or slurry bed reaction device. In a multiphase flow reactor, mass transfer, mixing and heat transfer between phases are important technical indicators that determine the performance of the reactor, and directly affect the reaction intensity, conversion rate and product quality. For gas-liquid-solid three-phase reaction systems, the mass transfer between phases is often the key factor determining the efficiency of the reactor. Especially for mass transfer is the ov...

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Problems solved by technology

The use of mechanical stirring not only consumes high energy, is not easy to seal, causes environmental pollution, but also affects the stability and consistency of product quality

Although the general bubbling bed has the advantages of simple structure, good contact between phases and easy temperature adjustment, the gas pressure drop is large and the flow rate is limited.

The trickle bed catalyst has less carryover, and the gas-liquid distribution is uniform, which can obtain a higher conversion rate and a small pressure drop, but the radial distribution of the liquid flow is not uniform when operating at a low liquid velocity, such as channel flow and bypass, which may cause solids The wetting of the catalyst is not complete, and it causes uneven temperature in the radial direction, resulting in local overheating, rapid deactivation of the catalyst and excessive vaporization of the liquid layer

The disadvantages of the rotary drum reactor are that the particle backmixing is small, the contact surface between phases is small, the heat transfer efficiency is low, and the equipment volume is large

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