Control method for stabilizing high-density carbon monoxide virgin gas transformation process

Abstract

The invention provides a control method for stabilizing the high-density carbon monoxide virgin gas transformation process. The control method is characterized by controlling balance of transformation reaction, namely the balance of the reaction is controlled by controlling the density of reagent to enable balance temperature distance to be smaller than 100 DEG C, so that the problem of overheat of a catalyst bed caused by the fact that carbon monoxide over-reaction generated by over large balance temperature distance can be resolved, and transformation operation is stabilized. The control method is suitable for transforming untreated gas with the dry basis content of carbon monoxide ranging from 48% to 75%. The control method can stabilize operation of the transformation process, greatly reduce water / gas of the transformation reaction, saves steam using quantity, prevents catalyst from devulcanization reaction, saves equipment investment and has remarkable energy-saving effect.

Description

technical field [0001] The invention relates to a control method for a stable high-concentration CO raw material gas shift process, in particular to a control method for stabilizing the operation of a first reactor in a high-concentration CO raw material gas shift process using coal as a raw material. Background technique [0002] my country is poor in oil and gas and rich in coal, and the coal chemical industry occupies an important position in our country. Coal gasification ammonia production, methanol production, coal-to-gasoline and other engineering projects have been fully launched and entered a stage of rapid development. Many new processes have been introduced and independently developed. Among the many new processes, the pulverized coal gas (respectively referred to as Shell pulverized coal gasification and GSP gasification technology), the modified Lurgi pulverized coal gasification (abbreviated as BGL gasification), and my country's self-developed spaceflight pulve...

AI Technical Summary

Problems solved by technology

Although the existing technology can suppress the side reaction of methanation, this process has a large driving force due to the high CO and water vapor in the raw material gas, and the equilibrium temperature range of the shift reaction is as high as hundreds or even thousands of degrees. A small amount of change will obviously affect the hot spot temperature of the bed. Therefore, it is necessary to control the shift reaction by controlling the amount of catalyst, and then control the hot spot temperature of the bed. This requires that the catalyst loading must be calculated accurately, otherwise the reaction depth will increase. , causing the bad result of bed "flying temperature"

[0004] Practice has proved that in the initial stage of start-up, some factories have excess catalyst loading due to failure to achieve full-load production, or because the catalyst loading calculation margin is large, the reactor has overheated phenomenon, in order to reduce the temperature of the reactor, water / gas They are all raised to above 2.0, which not only causes energy waste, but also causes frequent catalyst replacement and unstable production, which affects normal production due to the fact that the first stage of catalyst operates under harsh conditions of high water / gas and high temperature.

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