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Composite desulfurizing agent

A technology of desulfurization agent and settling agent, which is applied to the separation of dispersed particles, chemical instruments and methods, and separation methods. It can solve the problems of desulfurization performance of desulfurization liquid, high cost of liquid treatment, and restrictions on wide use, etc., and achieve less auxiliary salt. , to avoid desulfurization performance decline, the effect of stable performance

Inactive Publication Date: 2020-06-12
SICHUAN XIYOUZHICHENG PETROLEUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the entire cycle, especially during regeneration, part of the absorbed sulfide ions in the desulfurization liquid will react with oxygen to generate sulfite ions, thiosulfate ions and sulfate ions, and the continuous accumulation of these sulfide ions will lead to The desulfurization performance of the desulfurization liquid is continuously declining, so it is necessary to continuously drain the liquid to maintain the desulfurization performance, and the disposal cost of the discharged liquid is extremely high, so the economy is poor, which limits the wide application of this process

Method used

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  • Composite desulfurizing agent

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) In terms of mass percentage, the desulfurizer uses water as a solvent, and its composition is as follows:

[0028] Sodium iron edetate, 110g / L;

[0029] Sodium carbonate, 8g / L;

[0030] Polyacrylamide 1.1g / L;

[0031] Sodium polyacrylate, 450mg / L;

[0032] Polyaluminum chloride, 20mg / L;

[0033] Cetyltrimethylammonium hydroxide, 30mg / L;

[0034] Borax, 1.2g / L

[0035] Hydroquinone, 250mg / L,

[0036] the rest is water

[0037] Its configuration method: use water as a solvent, add sodium ferric edetate, stir for 1 hour to fully dissolve, then add borax, sodium carbonate, polyacrylamide, sodium polyacrylate, polyaluminum chloride and hydroquinone and stir , to make it evenly mixed, and the pH value of the finally obtained desulfurization liquid is 8.2.

[0038] (2) test

[0039] A: Sulfur-containing gas (coke oven gas) absorption conditions:

[0040] Gas flow (Nm 3 / h): 35000

[0041] Hydrogen sulfide content (v / v%): 0.527~0.857

[0042] Gas temperature (℃...

Embodiment 2

[0049] (1) In terms of mass percentage, the desulfurizer uses water as a solvent, and its composition is as follows:

[0050] Sodium iron edetate, 70g / L;

[0051] Sodium carbonate, 5g / L;

[0052] Polyacrylamide 1g / L;

[0053] Sodium polyacrylate, 450mg / L;

[0054] Polyaluminum chloride, 25mg / L;

[0055] Cetyltrimethylammonium hydroxide, 50mg / L;

[0056] Borax, 1.2g / L

[0057] Hydroquinone, 300mg / L,

[0058] the rest is water

[0059] Its configuration method: use water as a solvent, add sodium ferric edetate, stir for 1 hour to fully dissolve, then add borax, sodium carbonate, polyacrylamide, sodium polyacrylate, polyaluminum chloride and hydroquinone and stir , to make it evenly mixed, and the pH value of the finally obtained desulfurization liquid is 7.5.

[0060] (3) test

[0061] Sulfur-containing gas (natural gas field water flash steam) absorption conditions:

[0062] Gas flow (Nm 3 / d): 200~300

[0063] Hydrogen sulfide content (g / Nm 3 ): 100~150

[0064] ...

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Abstract

The invention discloses a composite desulfurizing agent and belongs to the technical field of gas purification. The composite desulfurizing agent comprises an iron-containing complex, an alkaline substance, a settling agent, a stabilizer, hydroquinone and water, wherein the iron ion concentration is 0.5-20 g / L and pH value is 7-8.5; the settling agent is a mixture of polyacrylamide, sodium polyacrylate, polyaluminium chloride and hexadecyl trimethyl ammonium hydroxide; according to the invention, the iron ion content is high, the sulfur capacity is high, the generated secondary salt amount issmall, sulfate ions can be removed along with sulfur, so that the situation that the desulfurization performance is reduced due to excessive accumulation of the sulfate ions in the solution is avoided, and therefore the performance is stable, secondary pollution is avoided, and generated sulfur particles settle fast and are convenient to separate.

Description

technical field [0001] The invention relates to the technical field of gas purification, in particular to a composite desulfurizer. Background technique [0002] Hydrogen sulfide is a toxic gas that widely exists in industry. Our daily natural gas, biogas, coke oven gas, etc. contain oily hydrogen sulfide. It can dissolve in water to form hydrogen sulfuric acid that corrodes pipelines and equipment. At the same time, it is a kind of Acute highly toxic gas, inhaling a small amount of high-concentration hydrogen sulfide can be fatal in a short period of time, and low-concentration hydrogen sulfide can affect the eyes, respiratory system and central nervous system, so it is necessary to purify the gas to remove hydrogen sulfide. [0003] There are many desulfurization methods at present. As a normal temperature desulfurization and regeneration desulfurization device, complexed iron has the advantages of simple operation and low cost. Its complexed iron desulfurization liquid is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/52B01D53/78
CPCB01D53/52B01D53/78
Inventor 杨林王建军
Owner SICHUAN XIYOUZHICHENG PETROLEUM TECH CO LTD
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