Technology for removing hydrogen sulfide in gas at room temperature

一种脱除气体、硫化氢的技术，应用在气体处理、硫的制备/提纯、化学仪器和方法等方向，能够解决不适合湿法循环脱硫、羟基氧化铁含量高、吸收剂消耗大等问题，达到克服物料消耗大、脱硫速度快、再生速度和效率高的效果

Active Publication Date: 2010-07-07
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Abstract
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Problems solved by technology

[0019] In summary, wet desulfurization in the prior art generally has problems such as harsh desulfurization conditions, complicated process, large consumption of absorbent, high requirements on equipment and poor desulfurization effect.
In addition, amorphous iron oxyhydroxide can be mentioned in many documents as desulfurizer, but in the amorphous iron oxyhydroxide desulfurizer prepared in the prior art, the content of amorphous iron oxyhydroxide is very low (less than 40%) ), and other non-renewable iron oxides such as ferric oxide, ferric oxide or other crystalline ferric oxyhydroxides have a high content, which makes these amorphous iron oxide desulfurizer products unable to regenerate and are not suitable for wet circulation desulfurization

Method used

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  • Technology for removing hydrogen sulfide in gas at room temperature
  • Technology for removing hydrogen sulfide in gas at room temperature

Examples

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Effect test

Embodiment 1

[0032] Preparation of materials containing amorphous ferric oxyhydroxide:

[0033] 456 g FeSO 4 ·7H 2O is made into an aqueous solution and placed in a reaction kettle, and the aqueous solution made of 135 grams of solid NaOH is added under stirring conditions, and the reaction temperature does not exceed 70°C by controlling the feeding rate of the NaOH solution. After the reaction is completed, filter and wash the filter cake with water. , until the Na in the filter cake + The content of the filter cake is less than 0.5%, and then the filter cake is made into a water suspension with a solid mass percentage of 30%, and the air is passed through for oxidation until Fe 2+ / Fe 总 If it is less than 1%, the material is completely oxidized, filtered, and dried at 90°C to obtain a material containing amorphous iron oxyhydroxide, wherein the mass percentage of amorphous iron oxyhydroxide is 85%, and the rest is Na 2 SO 4 , water and TiO 2 (TiO 2 for industrial FeSO 4 ·7H 2 O)...

Embodiment 2

[0037] Preparation of Materials Containing Amorphous Iron Oxyhydroxide:

[0038] Fe(NO 3 ) 2 ·6H 2 O is made into an aqueous solution and placed in a reaction kettle, and the aqueous solution made of solid NaOH is added under stirring conditions, and the reaction temperature is maintained at 30-40°C by controlling the feeding speed of the NaOH solution, and the pH of the solution at the end of the reaction is controlled = 7.5 , filter the solution, and wash the filter cake with water until Na in the filter cake + The content of the filter cake is less than 0.5%, and then the filter cake is made into a water suspension with a solid mass percentage of 10%, and the air is passed through for oxidation until Fe 2+ / Fe 总 If it is less than 1%, the material is completely oxidized, filtered, and dried at 70°C to obtain a material containing amorphous iron oxyhydroxide, wherein the mass percentage of amorphous iron oxyhydroxide is 100%. The sulfur capacity of the amorphous iron ox...

Embodiment 3

[0043] Preparation of Materials Containing Amorphous Iron Oxyhydroxide:

[0044] Make KOH into an aqueous solution and place it in a reaction kettle, and add solid FeCl under stirring conditions 2 formulated aqueous solution, by controlling the FeCl 2 The feed rate of the solution keeps the reaction temperature at 40-50° C., and controls the pH of the solution at the end of the reaction=8, filters the solution, and washes the filter cake with water until K in the filter cake. + The content of the filter cake is less than 0.5%, and then the filter cake is made into a water suspension with a solid mass percentage of 15%, and the air is passed through for oxidation until Fe 2+ / Fe 总 If it is less than 1%, the material is completely oxidized, filtered, and dried at 60°C to obtain a material containing amorphous iron oxyhydroxide. The mass percentage of amorphous iron oxyhydroxide in the material is 92%, and the remaining components are KCl , water and unknown impurities, the su...

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Abstract

The invention relates to a wet desulphurization method for removing hydrogen sulfide in gas at room temperature. The method comprises the following steps: 1. contacting gas containing hydrogen sulfide with suspending liquid containing desulfurizer in a desulphurization reactor to react; 2. sending the reacted suspending liquid to a regenerative reactor, wherein the suspending liquid is obtained from the step 1 and contains waste agent which is generated through desulfuration by using desulfurizer, regenerating the waste agent by using gas containing oxygen; and 3. sending the regenerated suspending liquid with desulfurizer which is obtained from the step 2 to the desulphurization reactor in the step 1, and contacting with hydrogen sulfide. The method for removing hydrogen sulfide in gas at room temperature of the invention has the advantages that the process is simple, the operation is performed under room temperature and normal pressure, the desulphurizing rate is high and the cost is low.

Description

technical field [0001] The invention relates to a process for removing hydrogen sulfide in gas under normal temperature and pressure, which is wet desulfurization and belongs to the field of gas purification. Background technique [0002] Gas desulfurization methods are basically divided into two categories, one is dry desulfurization, which is mainly used in occasions requiring a higher desulfurization rate, and the other is wet desulfurization, which is mainly used in occasions where desulfurization accuracy is not high but the processing capacity is large . [0003] The desulfurization methods used by wet desulfurization in different industries are also different. [0004] The most commonly used method in the oil refining industry is the alcohol amine method. Alcohol amine desulfurization is a typical absorption-regeneration reaction process. The principle is to use a weakly alkaline aqueous solution (alcohol amine) as an absorbent to absorb H in the raw material gas i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14C01B17/05
CPCB01D53/52B01D2259/126
Inventor 刘振义吴志强汪祥胜
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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