Production method of non-convertible combined methanol and dimethyl ether from coke oven gas

Abstract

The invention relates the producing method of coking gas non-convertible cogeneration methanol dimethyl ether, solving the problems of high dissipating energy, high cost and low conversion ratio. The method comprises the following steps: making coking gas decoking and desulfurizing, pressurizing them and putting them into converter, synthesizing methanol with copper as accelerating agent, transferring heat, cooling, separating, getting methanol, dimethyl ether and water, putting them into rectifying tower, getting methanol and dimethyl. The method is advanced and simple, and the product can replace diesel fuel, liquefied petroleum gas and Freon. The product is new pattern pollution-free energy and basis chemical engineering material.

Description

1. Technical field [0001] The invention relates to a production method of non-conversion and co-production of methanol dimethyl ether by directly using waste coke oven gas produced by coking to produce methanol and dimethyl ether, and is especially suitable for coking enterprises. 2. Background technology [0002] At present, the use of coke oven gas to produce methanol and dimethyl ether mostly adopts catalytic conversion and non-catalytic conversion methods, that is, the coke oven gas is first converted, and then methanol is synthesized, methanol is dehydrated to produce crude dimethyl ether, and the product is separated after rectification , this method requires a particularly huge investment in production, and also needs to consume a large amount of steam, with high energy consumption, high cost, and low ether conversion rate, and its products are difficult to effectively popularize and apply. 3. Contents of the invention [0003] In view of the above situation, the ob...

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Problems solved by technology

[0003] In view of the above situation, the object of the present invention is to provide a new non-conversion co-production method of methanol dimethyl ether in coke oven gas which directly uses the effective components of coke oven gas itself to synthesize methanol and use its reaction heat to prepare dimethyl ether without conversion. The production method can well solve the problems of high energy consumption, high cost, low conversion rate and difficulty in widespread application of the product in the production of dimethyl ether. The purpose of the present invention is achieved in this way, using the coke oven gas To directly pressurize and catalyze the synthesis of methanol or re-catalyze dehydration to produce dimethyl ether, that is, after detarring and fine desulfurization, the coke oven gas is pressurized into a synthesis tower, and after methanol is synthesized under the action of a copper-based catalyst, it is injected into dimethyl ether Synthetic tower, under the same pressure and a certain temperature, use modified alumina to catalyze the reaction to generate crude dimethyl ether, and then heat exchange, cooling, separate the mixture of methanol, dimethyl ether and water and send it to the rectification tower to rectify the product Methanol, dimethyl ether, and unreacted gas are sent to the post-work section for combustion and power generation. The production method of the present invention is advanced, simple and practical, and the original coking plant equipment can be used. It only needs to add synthesis, separation, rectification equipment and a little scientific transformation. It can produce cheap dimethyl ether, which has effectively changed the disadvantages of relying on conversion, large investment in production, and high energy consumption in the past. Because the produced product dimethyl ether can replace diesel oil, petroleum liquefied gas, and freon, it is Important new clean energy and basic chemical materials have a wide range of application space, and the raw material used is coking waste gas, so it has significant economic benefits and environmental protection social benefits

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