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Utilization method of methanol purge gas

A methanol purge gas, methanol technology, applied in chemical instruments and methods, preparation of organic compounds, catalyst activation/preparation, etc., can solve problems such as unstable production, improve carbon utilization, reduce emissions, and benefit the system stable effect

Active Publication Date: 2016-05-04
CHINA KINGHO ENERGY GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the desulfurizer easily leads to unstable production during the reduction of coke oven gas to methanol

Method used

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  • Utilization method of methanol purge gas
  • Utilization method of methanol purge gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0055] Send methanol purge gas into figure 1 In the methanol purge gas synthesis unit shown in . The methanol purge gas synthesis tower 1 is a GC-type water-cooled plate synthesis reactor produced by Nanjing Guochang Company, and the catalyst loaded therein is GC-308 catalyst of Nanjing Guochang Company. In the preheater 2, the methanol purge gas enters the tube side, and the synthesis product from the methanol purge gas synthesis tower enters the shell side. The logistics parameters of each position in the system are shown in Table 1.

[0056] Table 1

[0057]

[0058] It can be seen from Table 1 that by adopting the method of the present invention, the total carbon conversion rate of coke oven gas can be increased from the original 92% to over 98%, achieving the purpose of energy saving and emission reduction. At the same time, the invention provides a methanol purge gas synthesis system that can share the burden of the original coke oven gas methanol system in the nor...

Embodiment 2

[0061] The tail gas drawn from the gas phase outlet of the separator in Example 1 was used as the reducing agent for the reduction of the desulfurizing agent in methanol from coke oven gas. The desulfurizer is an iron-manganese desulfurizer, packed in a volume of 50m 3In the desulfurizer tank, the mixed gas of the tail gas and nitrogen is passed into the desulfurizer tank, the hydrogen content in the mixed gas is controlled to be 3-4mol%, and the temperature in the desulfurizer tank is raised to 120 ℃; then gradually increase the feed rate of the tail gas, reduce the feed rate of nitrogen gas, completely cut off the nitrogen gas when the hydrogen content in the mixed gas is increased to about 40mol% within 3 hours, and further remove the iron-manganese desulfurizer in the container After the bed temperature was gradually raised to about 350°C, the reaction was carried out for 30 hours, and the gas space velocity during the reaction was about 80 / h. During the whole reduction p...

Embodiment 3

[0063] The methanol purge gas in Example 1 was used as the reducing agent for the reduction of the desulfurizing agent in the production of methanol from coke oven gas. The desulfurizer is an iron-manganese desulfurizer, packed in a volume of 50m 3 In the desulfurizer tank, the mixed gas of the tail gas and nitrogen is passed into the desulfurizer tank, the hydrogen content in the mixed gas is controlled to be 3-4mol%, and the temperature in the desulfurizer tank is raised to 120 ℃; then gradually increase the inlet of the tail gas, reduce the nitrogen inlet, completely cut off the nitrogen when the hydrogen content in the mixed gas is about 40mol% within 3 hours, and further remove the iron-manganese desulfurizer bed in the container After the temperature was gradually raised to about 350°C, the reaction was carried out for 28 hours, and the gas space velocity during the reaction was about 75 / h. During the whole reduction process, there is no overheating phenomenon. The gas ...

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Abstract

The invention discloses a utilization method of methanol purge gas. The method comprises the following steps: feeding the methanol purge gas to a methanol purge gas utilization unit; and preparing a reducing agent for reducing a desulfurizer in methanol by using tail gas of the methanol purge gas utilization unit as coke-oven gas. The invention further discloses a utilization method of methanol purge gas, wherein the reducing agent for reducing the desulfurizer in methanol is prepared by using the methanol purge as coke-oven gas. The method disclosed by the invention can be used for breaking through the boundary of conventional simple combustion and utilization in the aspect of utilizing the methanol purge gas, and further deeply synthesizing the methanol purge gas, so that the utilization ratio of carbon is improved and the greenhouse gas emission is reduced. Moreover, by replacing the coke-oven gas with the methanol purge gas or the tail gas of the methanol purge gas which is deeply synthesized as the reducing agent, not only is the system stable, but also the coke-oven gas can be better used for synthesizing methanol, and the economic efficiency is improved.

Description

technical field [0001] The invention belongs to the field of coke oven gas methanol production, and relates to a method for utilizing methanol purge gas produced in coke oven gas methanol production. Background technique [0002] The use of coke oven gas produced by coking by-products to produce methanol, on the one hand, can partially alleviate my country's increasingly severe energy situation; on the other hand, it has opened up an effective, economical and environmentally friendly new way for the comprehensive utilization of waste gas in many coking enterprises. The main process of the existing coke oven gas to methanol technology is to convert the desulfurized coke oven gas to obtain the main components of CO, CO 2 and H 2 The raw material gas is sent to the methanol synthesis tower, and methanol is synthesized under the action of the catalyst. After the gas from the synthesis tower is cooled and separated from methanol, most of it is sent to the synthesis tower as rec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/04C07C29/151
CPCB01J37/18C07C29/151C07C31/04
Inventor 郭敬华周晓埜杨子江
Owner CHINA KINGHO ENERGY GRP
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