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System for producing methanol with coke oven gas and method for producing methanol with the system

A technology of coke oven gas and coke oven, which is applied in the field of coal chemical industry, can solve the problems of low space velocity, high difficulty, and low heat-carrying capacity of nitrogen, and achieve the effect of slow temperature rise and long driving time

Active Publication Date: 2018-04-06
CHINA KINGHO ENERGY GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through repeated driving practices, this method has three disadvantages: ① When the fine desulfurization system heats up, due to the low heat-carrying capacity of nitrogen, and the amount of nitrogen in the air separation is only 8000m 3 / h, nitrogen cannot be circulated (multiple cycles of nitrogen will introduce sulfur into the conversion section to poison the conversion catalyst), the space velocity is very low, the heat transfer is slow, and the temperature rise of the 7 tanks in the fine desulfurization process is very slow; ②The operation is very complicated and difficult; ③ The start-up process of each fine desulfurization system and conversion system lasts for a long time, reaching more than 40 hours

Method used

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  • System for producing methanol with coke oven gas and method for producing methanol with the system
  • System for producing methanol with coke oven gas and method for producing methanol with the system
  • System for producing methanol with coke oven gas and method for producing methanol with the system

Examples

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Effect test

Embodiment 1

[0056] Such as image 3 As shown, the system for preparing methanol from coke oven gas includes a fine desulfurization system and a conversion system; the fine desulfurization system includes a first coke oven gas compressor, a first heating furnace, and a fine desulfurization section connected by pipelines in sequence; The conversion system includes a second coke oven gas compressor, a second heating furnace, and a conversion section that are sequentially connected by pipelines;

[0057] The first coke oven gas compressor is used to provide coke oven gas to the fine desulfurization system;

[0058] The first heating furnace receives the coke oven gas from the first coke oven gas compressor to heat it;

[0059] The fine desulfurization section receives coke oven gas from the first heating furnace;

[0060] The second coke oven gas compressor is used to provide nitrogen to the conversion system;

[0061] The second heating furnace receives and heats the nitrogen from the second coke ove...

Embodiment 2

[0079] Such as Figure 5 As shown, the system for preparing methanol from coke oven gas is shown in Example 1. image 3 On the basis of the system shown, a fine desulfurization sub-line is also provided. One end of the fine desulfurization sub-line is set on the pipeline from the first heating furnace to the fine desulfurization section, and the other end is set in the sub-line. The first valve is connected to the pipeline of the conversion system.

[0080] Figure 5 The system shown in Example 1 image 3 The heating process of the system shown is consistent. due to Figure 5 Is in figure 1 Based on the existing design shown, and figure 1 The existing design shown includes the fine desulfurization main line, and the pipeline of the fine desulfurization main line is not easy to remove. Therefore, in order to simplify the operation steps when improving the existing design, the fine desulfurization line of the existing design is not removed. Desulfurization chief deputy line.

[0081...

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Abstract

The invention provides a system for preparing methyl alcohol with coke oven gas. The system comprises a fine desulfurization system and a conversion system. The fine desulfurization system comprises a first coke oven gas compressor, a first heating furnace, a fine desulfurization segment, an emptying opening and a first valve which are sequentially connected through pipelines. The conversion system comprises a second coke oven gas compressor, a second valve, a second heating furnace and a conversion segment which are sequentially connected through pipelines. The fine desulfurization system and the conversion system are independently heated respectively and can be heated at the same time. The fine desulfurization system uses coke oven gas for heating, and the conversion system uses circulating nitrogen for heating. According to the system for preparing methyl alcohol with the coke oven gas and a preparation method using the system, heating time can be reasonably arranged according to technical requirements, and start time of the fine desulfurization system and the conversion system is shortened.

Description

Technical field [0001] The invention belongs to the field of coal chemical industry, in particular to a system for preparing methanol from coke oven gas and a method for preparing methanol with the system. Background technique [0002] Qinghua Group uses coke oven gas to produce methanol, which is a 150 thousand tons / year coke oven gas to methanol plant designed by Sichuan General Design Institute, which has been in continuous and safe operation for many years. The conversion section of this device adopts a heat exchange conversion process. The principle is: when the desulfurization is qualified, a certain amount of water vapor is added according to the water vapor ratio, and the coke oven gas after a certain degree of preheating enters the heat exchange The tube pass of the conventional reformer (that is, the converter) is equipped with a reforming catalyst, and a certain degree of methane conversion reaction is carried out first, and then the gas enters the second-stage furnace...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C31/04C07C29/50C10K1/34
CPCC07C29/50C10K1/34C07C31/04
Inventor 郭敬华杨子江王立云田燕燕
Owner CHINA KINGHO ENERGY GRP
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