System and method for preparing ethanol and ethylene glycol synthesis gas by coke-oven gas carbon-supplementing conversion

Abstract

The invention discloses a system and a method for preparing ethanol and ethylene glycol synthesis gas by coke-oven gas carbon supplementing conversion, and solves the problem that the proportion of COand H2 obtained by coke-oven gas conversion in the prior art cannot meet the proportion requirement required by ethanol and ethylene glycol synthesis. The system comprises a coke-oven gas deoiling and naphthalene-removing unit, a coke-oven gas heating unit, a coke-oven gas hydrodesulfurization unit, a coke steaming mixed gas heating unit, a pure oxygen conversion unit, a converted gas heat recovery unit, a converted gas cooling unit, a converted gas-water separation unit, a converted gas decarburization unit, a PSA-CO unit and a PSA-H2 unit, the coke steaming mixed gas heating unit is connected with a CO2 conveying pipe, and the PSA-H2 unit is connected with a second H2 discharging pipe. The method comprises the following steps: removing tar, naphthalene and sulfur from the coke-oven gas,and carrying out oxidation and conversion reaction to generate converted gas containing H2, CO and CO2; after carrying out heat return, cooling, water separation and decarburization, obtaining CO andH2 through pressure swing adsorption.

Description

technical field [0001] The invention belongs to the technical field of producing synthesis gas from coke oven gas, and in particular relates to a system and a method for producing ethanol and ethylene glycol synthesis gas through carbon supplementation conversion of coke oven gas. Background technique [0002] When a general coking enterprise produces metallurgical coke, the typical composition of its coke oven gas is as follows: [0003] components H 2 CO 2 CO N 2 CH 4 cH O 2 total Content (V%) 59.7 2.8 7.5 5.0 21.9 2.3 0.8 100.00 [0004] Its impurity content is: [0005] components h 2 S organic sulfur naphthalene tar + dust NH 3 B.T.X (Benzene) HCN Content (mg / Nm 3 ) ≤20 ≤150 ≤100 ≤50 ≤50 ≤3000 ≤100 [0006] Coke oven gas contains a lot of CH 4 and H 2 , you can put CH 4 Convert to CO, CO 2 and H 2 , to remove CO 2 After separation, CO and H can be obtained ...

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Problems solved by technology

[0008] One of the objects of the present invention is to provide a system for producing ethanol and ethylene glycol synthesis gas by carbon replenishment conversion of coke oven gas, so as to solve the problem of obtaining CO and H from coke oven gas conversion in the prior art. 2 The ratio does not meet the ratio requirements for the synthesis of ethanol and ethylene glycol

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