Carbon monoxide segmented heat transfer half-reaction shift process capable of adjusting water-gas ratio and used for carbonyl synthesis

Abstract

The invention relates to a carbon monoxide segmented heat transfer half-reaction shift process capable of adjusting water-gas ratio and used for carbonyl synthesis, which is equivalent to a two-stage adiabatic process catalyst filling amount, through bypass adjustment and shift catalyst dynamics control, the problems of over-temperature and methanation reaction of the section I of a shift converter caused by low load or water-gas ratio change can be avoided; before the crude synthesis gas enters a low-pressure steam generator, high-pressure boiler water is sprayed, so that a large amount of water can be discharged from the supersaturated crude synthesis gas during subsequent condensation, and more ash and impurities can be brought out, therefore, the arrangement of a detoxification tank can be cancelled, and the process is more simplified; the section I of the shift converter adopts dynamic control, reaction conditions are mild, and the service life of the catalyst is prolonged; through the bypass of the outlet of a gas-liquid separator, the temperature of the converted gas at the I-section outlet of the conversion furnace can be effectively adjusted, so that the superheat degree of the converted gas entering the medium-high pressure steam superheater is ensured, and stable superheated medium-high pressure steam is obtained.

Description

technical field [0001] The invention relates to a high-concentration carbon monoxide staged heat transfer and half-reaction conversion process for oxo synthesis with adjustable water-gas ratio. Background technique [0002] The carbon monoxide conversion device has an extremely important position in the synthesis gas production device. It is the crude synthesis gas from the upstream gasification device, under the action of the catalyst, and according to the requirements of the downstream product for the hydrogen-carbon ratio, all or part of it reacts to generate hydrogen. . Different product requirements have a greater impact on the settings of the transformation process. For the production of hydrogen and synthetic ammonia, it is usually necessary to convert carbon monoxide into hydrogen as much as possible; for the production of oxo gas, such as synthetic methanol, ethylene glycol, synthetic oil, natural gas, etc., the transformation reaction depth is relatively shallow, ...

AI Technical Summary

Problems solved by technology

If the catalyst loading exceeds the range, it will cause the reaction depth to increase and lead to overheating; for the stage of low start-up load, the amount of crude synthesis gas is often only half of the normal amount or even lower, and for the same catalyst loading, it is very easy to cause overheating

And because the catalyst loading amount of the first shift furnace is constant, once an overtemperature occurs, it will be difficult to have a control means

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