A coke oven gas purification method and system
A technology of coke oven gas and hydrogen cyanide, applied in the field of coal chemical industry, can solve the problems of increasing production costs and achieve the effect of reducing production costs
Active Publication Date: 2015-11-11
HUATAI YONGCHUANG BEIJING TECH CO LTD
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Problems solved by technology
Because the ammonia in the coke oven gas has a corrosive effect on the equipment, before the deammonization of the coke oven gas, the cold drum unit and the relevant equipment and pipelines of the desulfurization unit must adopt corrosion-resistant special equipment, which will greatly increase Cost of production
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[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0034] Combine below figure 1 A method for purifying coke oven gas according to an embodiment of the present invention will be described.
[0035] S101 performs cooling treatment on the coke oven gas generated by coal coking.
[0036] The coke oven gas mentioned here is produced after coal coking. Generally, in the process of coal coking, many useful substances can be produced. Among these substances, about 75% are coke, and the other 25% are coke oven gas and ot...
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The invention discloses a method and a system for purifying coke oven gas in one embodiment. The method comprises the steps of cooling the coke oven gas generated in coal coking so that the temperature of the coke oven gas is lower than a predetermined temperature threshold, performing deamination treatment on the cooled coke oven gas so that the content of amine in the cooled coke oven gas is lower than a predetermined content threshold of amine, performing hydrogen sulfide removal and hydrogen cyanide removal treatment on the coke oven gas after the deamination treatment so that the content of hydrogen sulfide and the content of hydrogen cyanide are lower than a predetermined content threshold of hydrogen sulfide and a predetermined content threshold of hydrogen cyanide, respectively, and then performing dearomatization treatment on the coke oven gas after the hydrogen sulfide removal and hydrogen cyanide removal treatment so that the content of aromatic hydrocarbons in the coke oven gas is lower than a predetermined content threshold of aromatic hydrocarbons, thereby obtaining purified coke oven gas. As a deamination unit is arranged prior to a desulfuration unit, caustic amine can be removed firstly and then the related devices of the desulfuration unit do not need to be special corrosion-resistant devices, and therefore, the production cost is greatly reduced.
Description
technical field [0001] The invention relates to the field of coal chemical industry, in particular to a coke oven gas purification method and system. Background technique [0002] In the process of coal coking, many useful substances can be produced. Among these substances, about 75% are coke, and the other 25% are coke oven gas and other chemical products. [0003] The main components of coke oven gas produced after coal coking are net coke oven gas, water vapor, coal tar gas, ammonia, benzene group hydrocarbons, hydrogen sulfide, and other sulfides. The coke oven gas containing impurities must be purified to extract chemical products such as coal tar, ammonia, naphthalene, hydrogen sulfide, hydrogen cyanide, and crude benzene before obtaining clean coke oven gas. [0004] In the existing coke oven gas purification technology, when the coke oven gas comes out of the coke oven, it first enters the cooling drum unit, which is mainly used to reduce the temperature of the coke...
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IPC IPC(8): C10K1/00C10K1/08C10K1/04
Inventor 白守明马科伟
Owner HUATAI YONGCHUANG BEIJING TECH CO LTD