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Nowadays, the coal chemical industry line is all over the world, and the products of the coal chemical industry chain are closely related to our life.
Coal chemical industry takes coal as raw material, and obtains different coal chemical products through deep and shallow processing of coal by various processes.
According to statistics, there are thousands of products related to coal chemical industry. The famous Shenhua Baotou coal chemical Industry coal-to-olefin production line converts coal into methanol, and then converts methanol into olefin. Coal-to-methanol is an intermediate link product. Another Shaanxi Yulin coal to methanol project, coal to methanol when the final product.
All kinds of equipment are needed in the coal methanol production line, such as pumps, valves, compressors and so on. This paper discusses the application of butterfly valve in the coal methanol production process.

Production process of coal to methanol
Methanol is an important organic chemical raw material, while coal is an important raw material of methanol. The downstream products of methanol include formaldehyde, acetic acid, methylamine, dimethyl terephthalate, methyl tert-butyl ether and a series of organic chemical products. Under the environment of increasing shortage of petroleum resources, methanol can also be used as a source of petrochemical raw materials.

1) Wood or lignin distillation method
This process is a traditional process method, which needs to consume a large amount of wood, which is inconsistent with the current trend of advocating returning farmland to forest and protecting the environment, and the production efficiency is extremely low, so this process is rarely used.

2) chloromethane hydrolysis method
Chloromethane hydrolysis has high production efficiency and high purity, but the production cost is expensive and the application is limited.

3) Partial oxidation of methane
At present, this method is not difficult to produce technology, but the product purity is not high, so it is rarely used.

4) Synthetic gasification method
Syngas comes from coal, coke oven gas, natural gas, high production efficiency, high purity of methanol, low cost, is the current mainstream methanol production process.