Method for preparing hydrogen from coke oven gas by regenerating decarburization liquid by using desorption gas

A coke oven gas and gas analysis technology, which is applied in the chemical industry, can solve problems such as environmental pollution and energy waste, and achieve the effects of avoiding waste, saving equipment investment, saving electricity and maintenance costs

Active Publication Date: 2022-04-12
TANGSHAN ZHONGRONG TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0009] Based on the process of producing hydrogen from coke oven gas in the prior art, it is used to absorb CO in coke oven gas 2 The problems of energy waste and environmental pollution in the regeneration treatment of the propylene carbonate solution, the present invention provides a method for preparing hydrogen from coke oven gas that utilizes analytic gas for decarbonization liquid regeneration

Method used

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  • Method for preparing hydrogen from coke oven gas by regenerating decarburization liquid by using desorption gas
  • Method for preparing hydrogen from coke oven gas by regenerating decarburization liquid by using desorption gas
  • Method for preparing hydrogen from coke oven gas by regenerating decarburization liquid by using desorption gas

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Embodiment 1

[0100] refer to Figure 4 , the present embodiment provides a system for producing hydrogen from coke oven gas that utilizes analytical gas for decarburization liquid regeneration, specifically including:

[0101] Coke oven gas separator 1: the desulfurized coke oven gas pipeline A is connected to the coke oven gas separator 1, and the coke oven gas separator 1 leads to the condensate pipeline K and the dry desulfurized coke oven gas pipeline B, the dry desulfurized coke oven gas pipeline B is connected to the lower entrance of the absorption tower 2;

[0102] Absorption tower 2: It is an absorption tower with a built-in packing layer. The lower inlet is connected to the dry desulfurized coke oven gas pipeline B, the upper inlet is connected to the propylene carbonate lean liquid pipeline D, and the top outlet is connected to the CO removal 2 The final coke oven gas pipeline C is connected, and the bottom outlet is connected with the propylene carbonate rich liquid pipeline E...

Embodiment 2

[0111] Example 2, this example provides a specific method for producing hydrogen from coke oven gas that utilizes analytic gas for decarburization liquid regeneration, and the implementation of this method uses the system shown in Example 1.

[0112] The coke oven gas comes out of the gas tank, after being compressed once, it passes through the electric tar catcher to remove impurities such as tar and dust, and then it is sent out from the electric tar catcher, and after the second compression, it enters the TSA temperature swing adsorption to further remove benzene, naphthalene and tar and other impurities, so that the impurities of each component of the product gas are controlled at 10mg / m 3 Then enter the conversion cooling process to remove carbon monoxide, and then the gas enters the desulfurization device to remove most of the inorganic sulfur and a small amount of organic sulfur. After the desulfurized coke oven gas is compressed three times by the compressor, it enters...

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Abstract

The invention relates to a method for preparing hydrogen from coke oven gas by regenerating a decarburization solution by using desorbed gas, which comprises the following steps: carrying out tar removal, benzene removal, naphthalene removal, carbon monoxide removal and desulfurization treatment on the coke oven gas to obtain desulfurized coke oven gas; in an absorption tower, absorbing CO2 in the desulfurized coke oven gas by using a propylene carbonate solution to obtain a CO2-absorbed propylene carbonate rich solution and the CO2-removed coke oven gas; the method comprises the following steps: by taking desorption gas generated in a coke oven gas PSA hydrogen extraction process as regeneration gas, carrying out regeneration treatment on a propylene carbonate rich solution to obtain a propylene carbonate barren solution; concentrating and purifying the propylene carbonate barren solution through a rectification device to obtain a propylene carbonate solution for absorbing CO2 in the desulfurized coke oven gas; and the coke oven gas with CO2 removed enters a PSA unit to be subjected to methane extraction and hydrogen extraction treatment, and high-purity hydrogen is obtained. Compared with the prior art, the invention solves the problems of energy waste and environmental pollution in the original hydrogen production process.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for preparing hydrogen from coke oven gas which utilizes analytic gas to regenerate decarbonization liquid. Background technique [0002] Coke oven gas contains about 50-60% hydrogen. The production technology of coke oven gas to produce hydrogen is mature and has high economic efficiency, especially compared with water electrolysis hydrogen production, the economic benefit is remarkable. Water electrolysis hydrogen production Power consumption is 6.5kWh / m 3 , while coke oven gas hydrogen production consumes only 0.5kWh·m 3 , hydrogen production from coke oven gas is an important way to obtain industrial hydrogen with large-scale, low-cost and high-efficiency. [0003] The main process route of hydrogen production from coke oven gas is as follows: [0004] The coke oven gas is sent out from the gas holder, after being compressed once, it passes t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K1/00C10K1/04C10K1/16C10K1/32C10K1/02C01B3/50C01B3/52C01B3/56
Inventor 代淑梅王天双张东明李希柱
Owner TANGSHAN ZHONGRONG TECH CO LTD
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