Method for preventing sedimentation of catalyst in slurry bed reactor and slurry bed reaction device

Abstract

The invention provides a slurry bed reaction device for preventing a catalyst from settling, which comprises a slurry bed reactor, and a gas distributor is arranged in the slurry bed reactor; a bottom inlet of the slurry bed reactor is sequentially communicated with a main recycle gas compressor and a synthesis gas air cooler through a synthesis gas pipeline; the synthesis gas air cooler is provided with an auxiliary outlet and is communicated with a synthesis gas inlet of an auxiliary circulating gas compressor inlet liquid separation tank through a pipeline; a top outlet of the auxiliary circulation gas compressor inlet liquid separation tank is communicated with the auxiliary circulation gas compressor, a light dirty oil outlet is formed in the bottom of the auxiliary circulation gas compressor inlet liquid separation tank, and a decarburized tail gas inlet is formed in the middle of the auxiliary circulation gas compressor inlet liquid separation tank and used for introducing decarburized tail gas from a decarburization unit; and the auxiliary circulation gas compressor is provided with a decarburized tail gas outlet and a synthesis gas outlet, and the synthesis gas outlet is communicated with the bottom inlet of the slurry bed reactor. The invention also provides a method for preventing the catalyst in the slurry bed reactor from settling.

Description

technical field [0001] The invention belongs to the technical field of Fischer-Tropsch synthesis, and in particular relates to a method for preventing catalyst sedimentation in a slurry bed reactor and a slurry bed reaction device. Background technique [0002] The development and research of Fischer-Tropsch (F-T) synthesis reactors has made great progress in the past decades, and the typical ones are fixed-bed reactors, fluidized-bed reactors and slurry-bed reactors. In recent years, people have invested a lot of research on the slurry bed F-T synthesis technology. The slurry bed F-T synthesis technology is a process in which synthesis gas (H2+CO) is bubbled upward through a liquid-phase inert medium containing fine particle catalysts. . Compared with other reactors, the slurry bed reactor mainly has the following advantages: easy control of temperature and pressure, high operating flexibility, high product flexibility, good heat transfer and mass transfer effects, uniform...

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Problems solved by technology

[0003] Since the slurry bed reactor uses process gas-synthesis gas as the driving force for reaction mixing, once the gas source power disappears due to the main circulation compressor or other leakage reasons, the catalyst will deposit, and the catalyst entering the distributor is difficult to be blown out by the gas. Leading to blockage of the distributor, the resistance increases after the distributor is blocked, the production load cannot be increased, and it will lead to safety problems such as overpressure operation of the front system

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