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Method for preparing methanol from high-sulfur coal

A high-sulfur coal and methanol technology, applied in the field of coal chemical industry, achieves the effect of difficult operation, large reserves, and simplified methanol production process

Active Publication Date: 2015-02-11
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing methanol from high-sulfur coal and a method for utilizing high-sulfur coal, so as to solve many difficult problems in the application of high-sulfur coal and fully explore the economic benefits of high-sulfur coal

Method used

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  • Method for preparing methanol from high-sulfur coal

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Effect test

Embodiment 1

[0036] The high-sulfur coal is all raw materials for coking, and the coking conditions are: coking temperature 1300-1320°C; coking time 22-23h, to obtain coke (see Table 2 for the quality analysis of the obtained coke).

[0037] Table 2

[0038]

Embodiment 2

[0040] The coke obtained in Example 1 is further sent into a gasification furnace for gasification treatment. The gasification treatment conditions are: using 5-55mm coke blocks as raw materials, water vapor and oxygen as gasification agents, at an average pressure of about 3.2MPa, an average Under the condition of a temperature of about 1280°C, the gasification reaction is carried out to generate crude gas, wherein the amount of water vapor used is 1.8 tons / ton of coke, and the amount of oxygen used is 470Nm 3 / ton of coke. The crude gas was washed with water and methanol to remove dust, tar, sulfur and other substances that are not conducive to methanol synthesis. The main components of the purified gas are shown in Table 3. The effective gas content is 90%; the coke conversion rate is 95%.

[0041] table 3

[0042] CO

Embodiment 3

[0044] The coke obtained in Example 1 is further sent into the Lurgi gasifier for gasification treatment. The gasification treatment conditions are: using 5-55mm coke blocks as raw materials, using water vapor and oxygen as gasification agents, at an average pressure of about 3.5MPa , Under the condition of an average temperature of about 1250°C, the gasification reaction is carried out to generate crude gas, wherein the amount of the water vapor is 1.85 tons / ton of coke, and the amount of the oxygen is 480Nm 3 / ton of coke. The crude gas is washed and desulfurized by Claus to remove dust, tar, sulfur and other substances that are not conducive to methanol synthesis to obtain purified gas, in which the effective gas content is 92% and the coke conversion rate is 98%.

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Abstract

The invention discloses a method for preparing methanol from high-sulfur coal. The method comprises the following steps: coking from high-sulfur coal; gasifying a coke product prepared by utilizing a fixed bed under the gasification treatment conditions of taking 5-55mm coke buttons as raw materials and vapor and an oxidant as gasifying agents at 1100-1300DEG C under the pressure of 3-4MPa to produce crude gas; and synthesizing methanol by utilizing the crude gas. The invention further provides a utilization method of high-sulfur coal. According to the method, the existing high-sulfur coal difficult to utilize can be fully utilized to activate high-sulfur coal resource and increase the enterprise benefits; in addition, the method is significant to coking industry in China, so that the productivity of the coke production enterprises cannot be idled or wasted when the steelmaking industry is stagnant, and the influence and constraint of the steelmaking industry on the coke industry can be dispensed.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a method for preparing methanol from high-sulfur coal. Background technique [0002] Generally speaking, coal with a sulfur content greater than 3% is called high-sulfur coal. At present, nearly 8% of my country's proven coal resources are high-sulfur coal. According to the current national coal resource forecast and proven coal Calculation of reserves, the predicted total and proven reserves of high-sulfur coal are about 426 billion tons and 62 billion tons respectively, which is quite rich in resources. However, due to the high sulfur content of high-sulfur coal, the SO in the flue gas will be greatly increased during use. 2 Concentration and SO 2 The total amount of emissions will cause a bad impact on the environment. At present, there is no suitable treatment process and use methods that meet environmental protection requirements. In order to meet the SO 2 In order to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/04C07C29/151C10J3/60C10J3/84
CPCC07C29/151C10J3/60C07C31/04
Inventor 武振林杨吉平郭亮东王恒晓刘云廷刘玉龙潘瑞卿魏里阳王永利
Owner CHNA ENERGY INVESTMENT CORP LTD
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