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Foam type cleaning agent for processing iron sulfides

A foam-type cleaning agent and compound technology, applied in the field of cleaning agents, can solve problems such as waste, and achieve the effects of reducing usage, reducing cleaning costs and water consumption, and reducing the time required for cleaning

Inactive Publication Date: 2013-07-10
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the cleaning is completed, there is still a large amount of sulfuric acid in the wastewater, which not only causes waste, but also brings problems such as the treatment of acidic wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Prepare 75mL of sulfuric acid solution with a volume ratio of sulfuric acid and water of 1:10, then add 7.5g of gelatin with a mass fraction of 10%, 2.3g of sodium dodecylsulfonate with a mass fraction of 3.1%, and 8g of acetoethylamine to prepare become a cleaning agent. After the cleaning agent is stirred and foamed at a speed of 230 rpm, it is sprayed onto the inner wall of the sulfur-corroded steel container and left for 10 minutes. The sulfur-corroded product on the inner wall of the container can be completely dissolved, and the surface of the container wall is smooth. The cleaning agent was eluted with deionized water, and after detection, Fe in the solution 2+ The content is 1.843g.

Embodiment 2

[0022] Prepare 75mL of sulfuric acid solution with a volume ratio of sulfuric acid and water of 1:7.5, then add 1.5g of guar gum with a mass fraction of 2%, 1.5g of sodium dodecylbenzenesulfonate with a mass fraction of 2.1%, and 3g of benzene Alanine, formulated as a cleaning agent. After the cleaning agent is stirred and foamed at a speed of 480 rpm, it is sprayed onto the inner wall of the sulfur-corroded steel container and left for 6 minutes. The sulfur-corroded product on the inner wall of the container can be completely dissolved, and the surface of the container wall is smooth. The cleaning agent was eluted with deionized water, and after detection, Fe in the solution 2+ The content is 4.831g.

Embodiment 3

[0024] The volume ratio of preparation sulfuric acid and water is the sulfuric acid solution 75mL of 1:7.5, then add 0.23g mass fraction and be 0.2% xanthan gum, 0.75g mass fraction 0.8% hydroxyethyl cellulose and 1.8g glycine, be formulated as detergent. After the cleaning agent is stirred and foamed at a speed of 600 rpm, it is sprayed onto the inner wall of the sulfur-corroded steel container and left for 8 minutes. The sulfur-corroded product on the inner wall of the container can be completely dissolved, and the surface of the container wall is smooth. The cleaning agent was eluted with deionized water, and after detection, Fe in the solution 2+ The content is 4.674g.

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PUM

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Abstract

The invention belongs to the field of cleaning agents and particularly relates to a novel efficient foam type cleaning agent aiming at sediments of iron sulfides generated on a petrochemical device by sulfur corrosion. The cleaning agent can be further used for cleaning corrosion of other petrochemical devices or other devices. The cleaning agent consists of a sulfuric acid solution, a corrosion inhibitor, a thickening agent and a foaming agent. The foam type cleaning agent is prepared by the steps of stirring each component or blowing air into a solution after preparing each component in proportion. According to the foam type cleaning agent, the use level of the sulfuric acid is effectively reduced, the consumption of water is reduced, and the pollution caused by a large amount of cleaning waste liquid is reduced, thus being beneficial for processing and cyclic utilization of the waste liquid, and achieving the effects of cost reduction and environment protection. Meanwhile, as the specific surface area of the foam type cleaning agent is relative large, the cleaning efficiency is improved, the use level of the cleaning agent is reduced, the time required for cleaning is shortened, and an efficient target can be achieved.

Description

technical field [0001] The invention belongs to the field of cleaning agents, and in particular relates to a novel high-efficiency foam-type cleaning agent for sulfur-iron compound deposits produced by sulfur corrosion on petrochemical equipment. The cleaning agent can also be used for other chemical equipment or other equipment corrosion. cleaning. Background technique [0002] The safety issue of the petrochemical industry is one of the most important factors related to the survival and development of the industry. Due to the utilization of sulfur-containing crude oil, sulfur corrosion and its associated problems in petrochemical storage and transportation equipment have become more and more serious. There have been many incidents at home and abroad caused by the active sulfur corrosion products produced by sulfur corrosion in petroleum installations and the spontaneous combustion of the corrosion products. Oil and gas storage tanks, pipeline fires, explosions and other v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/06C23G1/08
Inventor 金鑫庚询
Owner BEIJING UNIV OF CHEM TECH
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