Comprehensive utilization technology used for production of gasoline and liquefied natural gas through methanol synthesis of crushed coal pressure gasification synthetic gas, and used for tar depth processing

Abstract

A comprehensive utilization technology used for production of gasoline and liquefied natural gas through methanol synthesis of crushed coal pressure gasification synthetic gas, and used for tar depth processing comprises the following steps: crushed coal pressure gasification synthetic gas undergoes hydrogen-carbon ratio transformation adjustment, undergoes low temperature methanol washing to remove carbon dioxide and hydrogen sulfide and other acidic gases, and undergoes methane depth cold separation to remove methane gas and produce LNG as a byproduct, parts of the obtained gas undergo pressure swing adsorption to remove hydrogen, stripping gas and the gas not subject to the pressure swing adsorption are mixed and undergo methanol synthesis to form gasoline, and hydrogen is used in hydrogenation and cracking of tar, heavy oil and naphtha which are byproducts of the rushed coal pressure gasification in order to prepare gasoline, diesel oil and heavy oil products. The technology has the advantages of high utilization rate, simplicity, reasonable product structure and small environmental pollution.

Description

technical field [0001] The invention belongs to a comprehensive utilization process for pressurized gasification of crushed coal to synthesize gasoline through methanol, co-production of liquefied natural gas and deep processing of tar. technical background [0002] my country has a coal-rich, oil-poor and gas-poor energy structure, in which oil and natural gas resources are seriously in short supply, far below the world average. In recent years, with the steady and rapid development of my country's economy, the gap between domestic oil and gas supply and demand has increased year by year, posing great challenges to national energy security, economic security and social security. The successful development and industrial application of coal-to-oil and coal-to-natural gas technologies is an important way to realize the clean and efficient conversion of coal resources, alleviate the contradiction between supply and demand of oil and gas, and ensure national security. [0003]...

AI Technical Summary

Problems solved by technology

However, at present, there is a serious excess capacity of methanol. If it is converted into methanol, the economic benefit is poor. At the same time, the tar produced by hydrogenation and cracking is of poor quality and prone to change. It is difficult to directly sell it as fuel oil, and it is generally used as an oil product. The use of regulators affects its economic benefits

Images