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Blast furnace gas desulfurization method and system

A blast furnace gas and desulfurization system technology, which is applied in combustible gas purification, removal of gas pollutants, combustible gas purification/reconstruction, etc., can solve the problem of high desulfurization cost, and achieve the effect of reducing desulfurization cost and improving service life.

Inactive Publication Date: 2019-09-10
湖南衡钢百达先锋能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The embodiment of the present invention provides a blast furnace gas desulfurization method and system, aiming to solve the problem of high desulfurization cost in the prior art

Method used

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  • Blast furnace gas desulfurization method and system
  • Blast furnace gas desulfurization method and system
  • Blast furnace gas desulfurization method and system

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Embodiment 1

[0040] See figure 1 , figure 1 It is a schematic flow diagram of a blast furnace gas desulfurization method according to an embodiment of the present invention, as figure 1 As shown, the method includes the following steps:

[0041] S1. Pass the compressed feed gas into the hydrolysis tower for COS hydrolysis to generate a mixed gas containing hydrogen sulfide;

[0042] S2. Pass the mixed gas containing hydrogen sulfide into the carbon dioxide purification device by pressure swing adsorption for rough desulfurization, obtain crude desulfurized gas, and perform adsorbent desorption on the adsorbent that has adsorbed carbon dioxide and hydrogen sulfide;

[0043] S3, passing the crude desulfurization gas into the fine desulfurization tower for fine desulfurization to obtain fine desulfurization gas;

[0044] S4. Pass the refined desulfurized gas into the carbon monoxide purification section of the pressure swing adsorption, and purify the carbon monoxide to obtain desulfurized...

Embodiment 2

[0048] See figure 2 , figure 2 It is the schematic flow chart of the method of embodiment two, as figure 2 As shown, on the basis of Example 1, after desorbing the adsorbed carbon dioxide and hydrogen sulfide adsorbent, the blast furnace gas desulfurization method also includes:

[0049] S301. Pass the desorbed carbon dioxide and hydrogen sulfide into a carbon dioxide recovery device for carbon dioxide recovery treatment.

[0050] Among them, the carbon dioxide recovery device can recover carbon dioxide while separating carbon dioxide and hydrogen sulfide, and can reuse the recovered carbon dioxide. Carbon dioxide can be adsorbed by a carbon dioxide adsorbent to separate carbon dioxide and hydrogen sulfide. The carbon dioxide adsorbent can be silica gel or a molecular sieve corresponding to carbon dioxide adsorption. After separating hydrogen sulfide, desorb the adsorbent that has adsorbed carbon dioxide to recover carbon dioxide.

Embodiment 3

[0052] See image 3 , image 3 It is the schematic flow chart of the method of embodiment three, on the basis of embodiment one, such as image 3 As shown, the specific crude desulfurization includes the following steps:

[0053] S201. Raising the pressure in the pressure swing adsorption carbon dioxide purification device to a preset first pressure value;

[0054] S202. Under the first pressure value, the adsorbent adsorbs carbon dioxide and hydrogen sulfide under high pressure to complete crude desulfurization.

[0055] Wherein, the above-mentioned first pressure value is preset, which is convenient for operation, and the range of the above-mentioned first pressure value may be 0.15Mpa. The above crude desulfurization can be understood as the removal of carbon dioxide and hydrogen sulfide. Since there is no need to generate elemental sulfur from hydrogen sulfide, the desorption speed of the adsorbent will be faster, and solid waste will not be formed during the crude des...

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Abstract

The invention is applicable to the technical field of energy conservation and provides a blast furnace gas desulfurization method and system. The blast furnace gas desulfurization method comprises thefollowing steps: S1, introducing a compressed raw material gas into a hydrolysis tower for COS (carbon oxysulfide) hydrolysis so as to generate a mixed gas with hydrogen sulfide; S2, introducing themixed gas with the hydrogen sulfide into a pressure swing adsorption purification carbon dioxide device for crude desulfurization so as to obtain a crude desulfurization gas, and carrying out desorption on an adsorbent which adsorbs carbon dioxide and hydrogen sulfide; S3, introducing the crude desulfurization gas into a refined desulfurization tower for refined desulfurization so as to obtain a refined desulfurization gas; and S4, introducing the refined desulfurization gas into a carbon monoxide pressure swing adsorption purification section, and purifying carbon monoxide, so as to obtain adesulfurization blast furnace gas. As no elemental sulfur is generated after the raw material gas is hydrolyzed, and the adsorbent adsorbs no elemental sulfur, the carbon dioxide and the hydrogen sulfide can be desorbed from the adsorbent, the adsorbent can be regenerated, the service life of the adsorbent can be prolonged, and the desulfurization cost of the blast furnace gas can be lowered.

Description

technical field [0001] The invention relates to the technical field of energy saving, in particular to a blast furnace gas desulfurization method and system. Background technique [0002] Blast furnace gas is a by-product combustible gas in the process of blast furnace ironmaking. Blast furnace gas contains combustible carbon monoxide gas, which is a gaseous fuel with low calorific value. Ladle etc. Blast furnace gas contains 0-50ppm carbonyl sulfide and 0-30ppm hydrogen sulfide. The adsorbent used in the purification of blast furnace gas is copper-based adsorbent. Sulfur can permanently inactivate the copper-based adsorbent. Therefore, the sulfur must be removed before entering the adsorption system. At present, the technology commonly used in blast furnace gas desulfurization method is as follows: first feed the raw material gas into the hydrolysis tower for COS hydrolysis to generate hydrogen sulfide, and after hydrolysis, the gas is in a certain amount of oxygen (if CO...

Claims

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Application Information

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IPC IPC(8): C10K1/32C10K1/00C10K1/10
CPCC10K1/004C10K1/101C10K1/32
Inventor 刘鹏陈文魁王国玺
Owner 湖南衡钢百达先锋能源科技有限公司
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