Sectionalized quenching fixed bed reactor and application method thereof

Abstract

The invention discloses a sectionalized quenching fixed bed reactor and an application method of the fixed bed reactor for preparing ethylene glycol from carbon monoxide. The reactor comprises: a reactor cylinder (10), more than two sections of catalyst bed layers (40, 50, 60) arranged in the reactor cylinder along a reaction material flowing direction, more than two sets of heat-exchange pipes (80) respectively arranged in the sections of catalyst bed layers (40, 50, 60), a reaction raw material inlet (20) and a reaction product outlet (30). Each set of heat-exchange pipes comprises a cooling medium inlet and a cooling medium outlet. The reactor provided by the invention can realize excellent heat-exchange effect. Also, catalyst loading and replacement operations are convenient.

Description

technical field [0001] The invention belongs to the fields of petrochemical industry and coal chemical industry, and in particular relates to a segmented quenching fixed-bed reactor. In addition, the present invention also relates to a method for preparing ethylene glycol from carbon monoxide feedstock using the reactor. In the reactor of the invention, the catalyst is arranged between the reactor shell and the heat exchange tube in the form of segmented beds, which improves the space utilization efficiency of the reactor, increases the loading amount of the catalyst, and thus increases the capacity of the reactor. At the same time, in the present invention, a heat exchange device is arranged in each bed, and rapid cooling is performed between each catalyst bed, which significantly improves the overall heat exchange effect. Background technique [0002] Ethylene glycol is an important raw material for the polyester industry. In recent years, the production of polyester in m...

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Problems solved by technology

However, the disadvantage of this type of reactor is that the catalyst loading efficiency in the tubes is low, and the cost of the reactor is high. At the same time, it is difficult to enlarge the reactor due to the limitation of the manufacturing and transportation conditions of the tube reactor, and the diameter of a single reactor is usually less than 5 meters.

In this way, the capacity of a single reactor cannot be further increased

In this field, carbon monoxide is prepared from raw materials such as coal, and then the production scale of ethylene glycol is synthesized from carbon monoxide through the above-mentioned process. Usually, the annual output of 200,000 tons of ethylene glycol can be achieved at least to achieve certain economic benefits. For such a scale The production capacity of ethylene glycol requires multiple tubular fixed-bed reactors to be connected in parallel, which significantly increases the equipment investment cost, and occupies a large area and is inconvenient to operate

[0014] At the same time, each tube reactor usually includes more than 10,000 tubes, and loading catalysts into these tubes one by one is a very time-consuming and laborious task, and the quality of catalyst loading is very high.

If it is impossible to ensure that all the catalysts in the tubes are loaded uniformly, it will inevitably make more reaction raw materials pass through a certain part of the tubes, while other tubes are in an ineffective reaction state, which will reduce the overall utilization efficiency of the catalyst in the reactor.

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