Neutral calcium sulfate scale cleaning agent

A technology of neutral cleaning agent and calcium sulfate scale, applied in the direction of non-surface active washing solvent, non-surface active detergent composition, detergent composition, etc., can solve the problem of scale treatment, calcium sulfate scale can not be cleaned thoroughly And other issues

Inactive Publication Date: 2011-01-26
金保全
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] At present, there is no way to thoroughly clean the calcium sulfat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] This embodiment is to undertake the cleaning of the evaporator of Weifang Calcium Chloride Factory. Due to long-term use, a large amount of calcium sulfate scale has formed on the inner surface of the tubes, which greatly reduces the heat exchange efficiency, reduces the evaporation effect, corrodes the equipment, and shortens the service life of the equipment. endanger safe production.

[0021] Calcium sulfate (CaSO 4 ) special neutral cleaning agent for dirt, and take the method of intermittent spraying and washing, and it will be cleaned within 12 hours. After cleaning, it is tested that the descaling rate is nearly 100%, the metal has no corrosion phenomenon, and there is no hydrogen permeation phenomenon that is harmful to steel. The cleaning waste liquid is non-toxic and is discharged from the system with the aqueous solution, and does not pollute the environment.

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PUM

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Abstract

The invention relates to a chemical cleaning agent, in particular to a special chemical cleaning agent for cleaning calcium sulfate (CaSO4) scale. The invention provides a novel cleaning agent and a scheme for cleaning the calcium sulfate scale, in the actual application, the novel cleaning agent can effectively clean the calcium sulfate scale in both working and stopping sates of boilers or industrial circulated cooling water system. The novel cleaning agent is prepared from the following raw material reagents in parts by weight: 10% of HEDP (Hydroxyl Ethidene Diphosphoric Acid), 0.05% of JFC (fatty alcohol-polyoxyethylene ether), 5% of cosolvents and 0.06% of nonionic PAM (polyacrylamide), and the pH value is regulated to 7 by using caustic soda. The reagent is a special cleaning agent for the calcium sulfate scale, mainly comprising a high-polymer organic polymer containing multi-functional groups, such as carboxyl, hydroxyl, amide and the like, and is specially used for cleaning indissolvable calcium sulfate scale, and the pH value of the reagent is 7. The cleaning agent is a neutral solution and has the advantages of thoroughly scale cleanness, no corrosion on metal, enamel and glass, no toxicity to human bodies, safe emission of waste liquid, high efficiency and safety without generating the phenomenon of hydrogen brittleness.

Description

technical field [0001] The present invention relates to a kind of chemical cleaning agent, specifically, relate to a kind of cleaning calcium sulfate (CaSO 4 ) Dirt chemical cleaning agent. technical background [0002] In daily industrial production, boiler water and industrial circulating cooling water are continuously circulated and concentrated during use, and the mineral content in the water will continue to increase, which will cause scaling and corrosion of equipment pipes. Once the equipment is scaled, it will greatly reduce the heat exchange efficiency, reduce the cooling effect, corrode the equipment, shorten the service life of the equipment, and endanger the safety of production. Therefore, the boiler and circulating cooling water pipes must be treated regularly. The common types of scale are carbonate scale, sulfate scale, silicate scale, mixed scale, iron oxide scale, oil scale and so on. [0003] At present, there is no way to thoroughly clean the calcium s...

Claims

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Application Information

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IPC IPC(8): C11D7/36C11D7/26C11D7/32C11D7/50C02F5/14
Inventor 金保全
Owner 金保全
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