Method for synthesis of glycol and co-production of LNG by using coke oven gas and converter and/or blast-furnace gas

Abstract

The invention relates to a method for synthesis of glycol and co-production of LNG by using coke oven gas and converter and / or blast-furnace gas, belonging to the technical field of chemical engineering. According to a technical scheme in the invention, the method comprises the following steps: subjecting coke oven gas to dust removal and tar removal treatment, and then performing compression treatment, and then performing crude desulfurization; removing impurities in the coke oven gas having undergone desulfurization treatment; subjecting the gas having undergone impurity removal to compression, fine desulfurization and O2 removal; then removing CO2 gas in the gas by using an amine process; carrying out cryogenic separation to obtain the product LNG, separating H2 and CO-rich gas at the same time, and then purifying H2; then subjecting converter and blast-furnace gas to dust removal and tar removal treatment; then carrying out compression and impurity removal, subjecting the gas having undergone impurity removal to fine desulfurization and O2 removal, and then removing CO2 gas in the gas; and combining the purified gas with the CO-rich gas, purifying the CO gas, subjecting the purified CO to esterification-carbonylation cyclic synthesis to produce DMO, and producing glycol from DMO and purified hydrogen. The method of the invention is applied to the synthesis technology of glycol for the first time.

Description

Technical field [0001] The invention relates to the field of gas purification, in particular to a method and device for synthesizing ethylene glycol from coke oven gas and converter and / or blast furnace gas to co-produce LNG. Background technique [0002] Coke oven gas, also known as coke oven gas, refers to a combustible gas produced by coke and tar products after high-temperature dry distillation of coking coal in the coke oven. It is a by-product of the coking industry. Coke oven gas has a higher calorific value and is usually used as fuel for high-temperature industrial furnaces or city gas. [0003] With the gradual increase in environmental protection requirements, the new coking industry access standards have clearly stipulated that the utilization rate of coke oven gas should exceed 98%. At the same time, the coking industry market is sluggish and overcapacity is serious. People are beginning to realize the huge use value of coke oven gas. Therefore, many coke oven gas uti...

AI Technical Summary

Problems solved by technology

In addition, converter gas and blast furnace gas are rich in carbon and low in hydrogen. At present, only a single gas is used to produce a certain product in the industry, which will lead to the inability to fully utilize some effective components in the gas, poor regulation, and contain some effective components. Part of the exhaust gas needs to find another way or can only be used as fuel, resulting in energy waste and environmental pollution

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