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Coal gasification to methanol conversion system and conversion method

A conversion system and coal gasification technology, which is applied in the field of coal chemical industry, can solve problems such as complicated process, unreasonable heat utilization, and poor catalyst activity, and achieve the effect of simple equipment and reasonable heat utilization

Pending Publication Date: 2019-10-22
陕西聚能新创煤化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of unreasonable heat utilization, poor catalyst activity and complicated process in the background technology, the present invention provides a kind of catalyst with reasonable heat utilization, good catalyst activity, long service life, simple process equipment, stable operation of the conversion system and wide application range. Coal gasification methanol conversion system and conversion method

Method used

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  • Coal gasification to methanol conversion system and conversion method

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Comparison scheme
Effect test

Embodiment 1

[0030] see figure 1 , The coal gasification to methanol shift system provided by the present invention includes a separator 1, a heat exchanger 5, a detoxification tank 2, a shift furnace 3, a steam superheater 4, a first steam pipeline and a second steam pipeline.

[0031] Specifically, the crude gas from coal gasification is connected to the inlet of separator 1; the outlet at the bottom of separator 1 is connected to the waste liquid pipe network of the system; the outlet at the top of separator 1 includes two branches; one branch is the outlet at the top of separator 1 through The heat exchanger 5 is connected to the inlet of the detoxification tank 2; the other branch is that the top outlet of the separator 1 directly enters the converted system; the outlet of the detoxification tank 2 is connected to the shell-side inlet of the converter 3, and the first steam pipeline is provided with Valve 6, the valve 6 can adjust the pressure of the saturated steam flowing on the fir...

Embodiment 2

[0033] During implementation, due to the low pressure of the crude gas and the high content of CO, in order to improve the efficiency of the shift reaction and make reasonable use of heat, the gas entering the shift furnace must be filled with saturated steam. Before the shift process starts, it is necessary to open the Valve 6 on the first steam line. During implementation, the pressure of the added saturated steam should be slightly higher than the pressure of the raw gas entering the conversion system. This is to ensure that the saturated steam can be added to the raw gas well and quickly, and at the same time avoid leaks that make the water vapor in the raw gas increase, affecting the occurrence of transformation reactions.

[0034]Specifically, when the CO content in the crude gas is 60-80%, and the pressure is 3.0-4.5Mpa, since the pressure of the crude gas is low and the CO content is high, in order to achieve the conversion effect, it is necessary to add a stream of sa...

Embodiment 3

[0036] In the present invention, the shift furnace 3 is a spiral tube heat exchange type shift furnace, the structure of the steam superheater 4 is a spiral tube type, and a catalyst bed is arranged in the shell side of the shift furnace, and the catalyst bed is a sulfur-resistant shift catalyst bed. Specifically, B8-11 or QDB-04 catalysts can be used as catalysts. The operating temperature of the catalyst is low, generally 180-330°C; the carbon monoxide is low after conversion; the anti-sulfur poisoning ability is strong, the activity is good during conversion, and the conversion efficiency is high. .

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Abstract

The invention belongs to the technical field of coal chemical industry, and relates to a coal gasification to methanol conversion system which comprises a separator, a detoxification tank, a conversion furnace and a steam superheater. The top outlet of the separator is divided into two branches, wherein one branch is that the top outlet of the separator is connected with the shell side inlet of the conversion furnace through the detoxification tank; the shell side outlet of the conversion furnace is divided into two branches, wherein one branch is connected with the shell side inlet of the steam superheater; the coal gasification to methanol conversion system also comprises a first steam pipeline and a second steam pipeline, wherein the first steam pipeline is connected with the shell sideinlet of the conversion furnace; the second steam pipeline is respectively connected with the tube side inlet of the conversion furnace and the tube side inlet of the steam superheater; a valve is also arranged on the first steam pipeline. The coal gasification to methanol conversion system has reasonable heat utilization, good catalyst activity, long service life, simple process equipment and stable operation of the conversion system.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and relates to a coal gasification methanol conversion system and conversion method. Background technique [0002] In the synthesis of methanol, the conversion process refers to the process in which crude gas reacts with water vapor at a certain temperature with the help of a catalyst, and carbon monoxide generates carbon dioxide and hydrogen. Through the shift reaction, the carbon monoxide in the crude gas is removed, and methanol synthesis gas is obtained. Therefore, the shift process is not only a conversion process in methanol synthesis, but also a purification process. [0003] When producing products after coal gasification, when the crude gas is at a relatively high steam-gas ratio, if the crude gas with high CO content and low pressure and the crude gas with low CO content and high pressure are converted to methanol, there will be the following problems: Catalyst The high ...

Claims

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Application Information

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IPC IPC(8): C01B3/40C07C29/151C07C31/04
CPCC01B3/40C07C29/151C07C31/04C01B2203/0227C01B2203/061C01B2203/1017C01B2203/1241C01B2203/14
Inventor 刘建国孙占买王建雄马立发李慧军闫慧唐乐
Owner 陕西聚能新创煤化科技有限公司
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