Carbon monoxide shifting process

Abstract

The invention relates to a carbon monoxide shifting process, and is used for solving the problems that existing carbon monoxide shifting processes are complex and are long in flows, system temperatures are instable to control and catalysts are easy to inactivate. The carbon monoxide shifting process comprises the steps that the raw gas is sent to a gas filter to be filtered after undergoing gas-liquid separation in a gas separator and then is sent to a steam mixer to be mixed with medium pressure steam, the gas mixture is sent to a gas preheater to exchange heat with the reaction gas coming out of an isothermal reactor to be heated, the heated gas mixture is sent to the isothermal reactor to react, so that the reaction conversion rate of the raw gas is above 90%, and the reaction gas after reaction is sent to the gas preheater to exchange heat with the gas mixture to be cooled and then is sent to a low-temperature adiabatic reactor to further fully react, thus obtaining the shift gas. The process has the advantages of extremely simple flow, reliability in control, low equipment investment, low operating cost, energy conservation and consumption reduction and capability of obtaining high-grade steam.

Description

technical field [0001] The invention relates to a conversion process in the chemical industry, in particular to a carbon monoxide conversion process. Background technique [0002] Using shift reaction to adjust CO and H in gas 2 It is an important way in the coal chemical industry to produce chemical products such as methanol, synthetic ammonia, and natural gas. Taking synthetic ammonia as an example, the raw material gas required for the production of synthetic ammonia is hydrogen and nitrogen, while crude gas generally contains a relatively large amount of CO, which can reach more than 70%, which needs to be converted into CO by reacting with water 2 with H 2 . Carbon monoxide shift is a process in which crude gas reacts with water vapor in a shift reactor at a certain temperature with the help of a catalyst to generate carbon dioxide and hydrogen. [0003] The transformation reaction is a strongly exothermic reaction and is a process controlled by thermodynamics. In i...

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Problems solved by technology

[0003] The transformation reaction is a strongly exothermic reaction and is a process controlled by thermodynamics. In the industry, most transformation devices use adiabatic fixed-bed reactors. This reaction process is generally equipped with multi-stage reactors and multiple heat exchange equipment. The process route is long and the system resistance Large, large project investment, high energy consumption in operation, high energy consumption of low-grade heat but cannot be effectively used, high energy consumption of the system, easy overheating of the reactor, high temperature deactivation of the catalyst, etc.

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