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Coke-oven gas transform processing method

A conversion treatment, coke oven gas technology, applied in chemical instruments and methods, combustible gas purification, combustible gas purification/transformation, etc., can solve problems such as short life, clogging of catalyst micropores, catalyst deactivation, etc., to achieve convenient operation, Improved production efficiency and low steam consumption

Active Publication Date: 2011-07-13
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) Coking and carbon formation of unsaturated hydrocarbons will block the micropores of the catalyst, resulting in rapid deactivation of the catalyst and a short service life;
[0009] (2)O 2 React with sulfide in coke oven gas to form SO 2 , further oxidized to SO 3 , SO 2 and SO 3 Reacts with the metal in the catalyst to generate sulfate, which blocks the micropores of the catalyst and causes rapid deactivation of the catalyst

Method used

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  • Coke-oven gas transform processing method
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Experimental program
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Effect test

Embodiment 1

[0038] Conditions for entering the transformation device:

[0039] Coke oven gas volume 5000Nm 3 / h

[0040] Change pressure 0.6Mpa(G)

[0041] CO content 6%

[0042] o 2 Content 0.2%

[0043] Unsaturated hydrocarbons 1.2%

[0044] The coke oven gas shift treatment method of this embodiment includes the following main steps, and its flow chart is as follows figure 1 Shown:

[0045] (1) Purification treatment: the raw coke oven gas is purified to remove impurities such as naphthalene, benzene and tar;

[0046] (2) Preheating: Compress the coke oven gas after the above-mentioned purification treatment to 0.6MPa(G), pass through the preheater, and preheat the shift gas from the third stage of the shift furnace in the preheater to 115°C.

[0047] (3) Heat exchange: Pass the above-mentioned preheated coke oven gas through the intermediate heat exchanger, and exchange heat with the shift gas from the second stage of the shift furnace in the intermediate heat exchanger to rea...

Embodiment 2

[0058] Conditions for entering the transformation device:

[0059] Coke oven gas volume 100000Nm 3 / h

[0060] Change pressure 2.5MPa

[0061] CO content 10%

[0062] o 2 Content 0.8%

[0063] Unsaturated hydrocarbons 2.5%

[0064] The coke oven gas shift treatment method of this embodiment includes the following main steps, and its flow chart is as follows figure 1 Shown:

[0065] (1) Purification treatment: the raw coke oven gas is purified to remove impurities such as naphthalene, benzene and tar;

[0066] (2) Preheating: Compress the coke oven gas after the above-mentioned purification treatment to 2.5MPa, pass through the preheater, and preheat the shift gas from the third stage of the shift furnace in the preheater to 165°C.

[0067] (3) Heat exchange: pass the above-mentioned preheated coke oven gas through the intermediate heat exchanger, and exchange heat with the shift gas from the second stage of the shift furnace in the intermediate heat exchanger to reach ...

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Abstract

The invention discloses a transform processing method for coke oven gas, which comprises the steps that raw material coke oven gas is subjected to purifying treatment to remove the contained naphthalin, benzene and tar, and then sequentially passes through a preheater, an intermediate heat exchanger, a shift converter first section, a humidifier, a shift converter second section, the intermediate heat exchanger, a shift converter third section, the preheater and a cooler so as to obtain the shift gas with the content of H2 being increased. The method has simple flow, low steam consumption and convenient operation; and after being processed by the method, the content of the H2 in the oven gas is remarkably increased and the content of CO is reduced, thus extracting the H2 and CH4 by an economic and convenient separation mode and correspondingly increasing the content of the H2; in addition, through the process on the technical process, the problems that the catalyst is fast deactivated due to the unsaturated hydrocarbon coking, caking and the blockage of catalyst millipores, and the like can be effectively resolved, thus leading the transform process to continuously run for a long period and improving the production efficiency.

Description

technical field [0001] The invention belongs to the technical field of coke oven gas treatment and application, and in particular relates to a coke oven gas conversion treatment method. Background technique [0002] Coke oven gas is a by-product of coke production, mainly containing: H 2 ~59%, CH 4 ~24%, CO ~8.5%, CO 2 ~3%, O 2 ~0.5%, N 2 ~2.5%, unsaturated hydrocarbon ~2.5%, and impurities such as sulfide, naphthalene, benzene, tar, etc. Through specific treatment methods, CH can be purified separately from coke oven gas 4 and H 2 Wait. [0003] In the field of utilization of water gas, semi-water gas, etc., there are usually transformation methods to improve the H 2 content to meet production needs. The conversion process is to combine CO and H 2 O vapor reacts to convert to H 2 and CO 2 , the reaction principle is as follows: [0004] CO+H 2 O→H 2 +CO 2 +41.4kJ / mol [0005] For example, in a synthetic ammonia plant, the useful component of raw gas (semi-w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B3/12C10K1/22
Inventor 冉崇慧冉世红杨先忠黄维柱
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND