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Sulfur precipitant, desulfurization system and application thereof

A precipitant and sulfur technology, applied in the field of desulfurization, can solve the problems of sulfur floating up and desulfurization system not running smoothly

Active Publication Date: 2021-03-09
CHINA PETROCHEMICAL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For systems with high sulfur capacity, sulfur treatment is still a key issue, and the problems of sulfur floating and sulfur plugging will cause the desulfurization system to fail to operate smoothly

Method used

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  • Sulfur precipitant, desulfurization system and application thereof
  • Sulfur precipitant, desulfurization system and application thereof
  • Sulfur precipitant, desulfurization system and application thereof

Examples

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preparation example Construction

[0035] In the present invention, the preparation method of the sulfur precipitating agent preferably includes the following steps: mixing the N-acyl amino acid type surfactant and water, mixing the polyethylene glycol type nonionic surfactant and / or organosilicon surfactant Dissolve in low-carbon alcohol, and then mix the two liquid phases to obtain the sulfur precipitant.

[0036] The present invention does not specifically limit the specific manner of dissolving and mixing, and methods well known to those skilled in the art can be used.

[0037] The present invention also provides a desulfurization system, which includes a desulfurization agent packed separately and the sulfur precipitation agent described in the above scheme; the composition of the desulfurization agent includes a desulfurization catalyst, a stabilizer, alkali and water.

[0038] In the present invention, the desulfurization catalyst is preferably a complex iron compound, specifically iron nitrilotriacetate...

Embodiment 1

[0047] (1) Preparation of sulfur precipitant: Utilize isopropanol, sodium lauroyl sarcosinate, laurylphenol polyoxyethylene ether and water to prepare sulfur precipitant. The preparation method is: mix sodium lauroyl sarcosinate and water Mixing, dissolving dodecylphenol polyoxyethylene ether in isopropanol, and then mixing the two liquid phases to obtain a sulfur precipitant. Wherein the consumption of each component is shown in Table 1.

[0048] (2) Preparation of desulfurizer: Utilize ferric ammonium sulfate, NTA-3Na (trisodium aminotriacetate), sodium gluconate, sodium hydroxide and water to prepare desulfurizer, preparation method is: ferric ammonium sulfate, NTA-3Na and Sodium gluconate is dissolved in water, and then sodium hydroxide is added to adjust the pH value of the solution to 8-9 to obtain a desulfurizer. The dosage of each component is shown in Table 2, and the sulfur capacity of the desulfurization liquid prepared according to the composition table is 3.0g / L....

Embodiment 2

[0062] Chuanke 1 well pilot test device, the gas flow rate is 3000 m3 / d (hydrogen sulfide content is 0.859%), the sulfur output is 30kg / d, and it is operated continuously for 15 days to investigate the influence of sulfur precipitant on sulfur.

[0063] 150g of sodium lauroyl sarcosinate and water are mixed, 15g of polyoxyethylene dodecylphenol ether is dissolved in 15g of isopropanol, and then the two liquid phases are mixed to obtain a total surfactant mass fraction of 16.5% 1L of sulfur precipitant.

[0064] The prepared sulfur precipitant is continuously added to the desulfurization system with a total iron content of 10g / L, wherein the composition of the desulfurizer is consistent with that of Example 1, and the amount of the sulfur precipitant is controlled at 15-20mg / L. Settlement status and blockage of the device pipeline.

[0065] Observation results such as Figure 6 as shown, Figure 6 The left side is the desulfurization solution after the sulfur in the system i...

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Abstract

The invention relates to the technical field of desulfurization, and provides a sulfur precipitant, a desulfurization system and an application thereof, the sulfur precipitant provided by the invention comprises 5-15% of an Nacylamino acid type surfactant, 0-1% of a polyethylene glycol type nonionic surfactant, 0-1% of an organosilicon surfactant, 0.1-1% of low carbon alcohol and the balance of water; wherein the content of the polyethylene glycol type nonionic surfactant and the content of the organic silicon surfactant are not zero at the same time. The sulfur precipitator provided by the invention can effectively change the state of sulfur in the desulfurization liquid, reduce the surface tension of the liquid, wet the sulfur, enable the sulfur to sink after being wetted, and effectively prevent the sulfur from being adhered and blocked, so that the problems that sulfur particles float upwards and are difficult to separate from the desulfurization liquid are solved, and the stable operation period of the device is prolonged. The desulfurization system provided by the invention is stable in performance and high in hydrogen sulfide purification degree, and sulfur generated by thesystem sinks under the action of the sulfur precipitant, is easy to filter and separate, and is not easy to generate sulfur blockage.

Description

technical field [0001] The invention relates to the technical field of desulfurization, in particular to a sulfur precipitant, a desulfurization system and applications thereof. Background technique [0002] Wet redox complex iron desulfurization is a method of removing hydrogen sulfide with complex iron as a catalyst. It can directly convert hydrogen sulfide in natural gas into elemental sulfur. It has relatively few equipment, short process flow, and recyclable chemicals. features. Conventional desulfurization reagents have low iron ion content (1-1.5g / L), so the sulfur capacity is low, about 0.3-0.4g / L, and the solution circulation volume is large if the sulfur capacity is low, and the energy consumption of the desulfurization system varies with the circulation volume increases linearly. When the scale of natural gas desulfurization treatment is large, the desulfurization equipment is bulky and the energy consumption of the system is high; in addition, the sulfur partic...

Claims

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Application Information

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IPC IPC(8): C10L3/10
CPCC10L3/103C10L2290/12C10L2290/44
Inventor 李金环朱红彬李孟杰张硕琳李清方张庆征刘海丽刘花蕾傅莉张宁宁王伟建王辉陆诗建
Owner CHINA PETROCHEMICAL CORP
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