Isothermal conversion process of high-concentration carbon monoxide and system thereof

Abstract

The invention discloses an isothermal conversion process of high-concentration carbon monoxide and a system thereof, and solves the problems of long procedure period, high system resistance and short in catalyst life in the existing conversion process. According to the adopted technical scheme, raw material gas flows through a raw material gas separator, so that water carried by the raw material gas is separated; then the raw material gas is filtered by a filter, and then is introduced into a shell side of a gas cooling conversion reactor to be preheated; the preheated raw material gas is introduced into a water cooling conversion reactor I to carry out conversion reaction; steam pocket byproduct steam is used for removing reaction heat of the conversion reaction; conversion gas out of the water cooling conversion reactor I is returned to the shell side of the gas cooling conversion reactor to preheat the raw material gas in the shell side,, so s to remove the reaction heat and continue to carry out conversion reaction; the conversion gas out of the gas cooling conversion reactor is further subjected to heat recycling, and after the condensed liquid is separated, the conversion gas is subsequently introduced into the downstream process. The isothermal conversion process of high-concentration carbon monoxide is simple in process, high in system reliability, low in methanation side reaction, short in process, low in system resistance, long in service life of catalyst, and low in equipment investment and operation cost.

Description

technical field [0001] The invention relates to an isothermal transformation process and a system thereof, in particular to a high-concentration carbon monoxide isothermal transformation process and a system thereof. Background technique [0002] my country is a country rich in coal resources and relatively scarce in petroleum resources. The efficient utilization of coal resources has important strategic significance for our country. Since the beginning of the 21st century, my country's coal chemical industry has entered a stage of rapid development, and coal is used as raw material to produce synthetic ammonia. Urea, hydrogen production, synthetic methanol, ethylene glycol, synthetic natural gas and other technologies have been vigorously developed. [0003] The carbon monoxide shift process is an indispensable part of modern coal chemical technology. Its main function is to adjust the ratio of carbon monoxide and hydrogen in the synthesis gas through the shift reaction to m...

AI Technical Summary

Problems solved by technology

[0004] The shift reaction is an exothermic reaction. The traditional shift process uses an adiabatic shift reactor. The shift reaction of high-concentration carbon monoxide often causes the overheating of the catalyst bed due to the excessive reaction driving force, which seriously affects the service life of the catalyst and the stability of operation.

In order to solve this problem, a high water-gas ratio process or a low water-gas ratio process is generally adopted. In the high water-gas ratio process, the water-gas ratio and carbon monoxide content of the raw material gas are very high, and the loading amount of the catalyst must be accurately calculated, otherwise the catalyst bed will There will be over-temperature, and the water-gas ratio of raw material gas in the low water-gas ratio process is relatively low. The reaction temperature can be well controlled through the reaction balance, but the low water-gas ratio process has the risk of side reaction of methanation

In addition, the traditional adiabatic conversion process generally has problems such as long process flow, many equipment, large system resistance drop, high bed hot spot temperature, and short catalyst life.

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