Descaling cleaning agent for heat-engine plant pipe and preparation method thereof

Abstract

The invention relates to a descaling cleaning agent for a heat-engine plant pipe and a preparation method thereof, and belongs to the field of the chemical washing. There is not the descaling cleaningagent which is simple in ingredient, non-toxic and non-corrosive, green and environmental, biodegradable, and environment-friendly yet. The descaling cleaning agent is formed by 0.5% of polyasparticacid, 0.5% of 2-phosphonobutane-1,2,4-tricarboxylic acid, 8% of hydrochloric acid, 1% of thiourea, and 90% of demineralized water. The preparation method comprises the following steps: heating the demineralized water to 55-65 DEG C, successively adding the polyaspartic acid, the 2-phosphonobutane-1,2,4-tricarboxylic acid, the hydrochloric acid and the thiourea in a condition of continuously stirring; after uniformly mixing, cooling, and preparing the descaling cleaning agent. The descaling cleaning agent is scientific in formula, strong in descaling capacity, safe and efficient, non-toxic andnon-corrosive, green and environmental, biodegradable, and environment-friendly, and suitable for the heat-engine plant pipe and the like.

Description

technical field [0001] The invention relates to a descaling and cleaning agent, which belongs to the field of chemical washing, in particular to a descaling and cleaning agent for pipelines of thermal power plants and a preparation method thereof, which is mainly used for cleaning pipelines of thermal power plants. Background technique [0002] After running for a long time in the economizer pipes, water wall pipes, superheater pipes, and reheater pipes of thermal power plants, a thick layer of scale will be formed on the inner wall of the pipes. The presence of this scale can shorten the length of the pipes. service life, and may even cause a tube burst, leading to serious quality and safety accidents. In order to prevent problems before they happen, manual cleaning is generally used to clean the pipes of thermal power plants. The manual cleaning method is not only time-consuming and laborious, but also has low cleaning efficiency, which cannot meet the production requireme...

AI Technical Summary

Problems solved by technology

[0002] After running for a long time in the economizer pipes, water wall pipes, superheater pipes, and reheater pipes of thermal power plants, a thick layer of scale will be formed on the inner wall of the pipes. The presence of this scale can shorten the length of the pipes. service life, and may even cause tube explosion, leading to serious quality and safety accidents

In order to prevent problems before they happen, manual cleaning is generally used to clean the pipes of thermal power plants. The manual cleaning method is not only time-consuming and laborious, but also has low cleaning efficiency, which cannot meet the production requirements and the cleanliness requirements of the pipe wall; The method of acid cleaning, the method of acid cleaning can not only remove the scale, but also corrode the pipeline, shortening the service life of the pipeline

[0003] At present, there are also descaling agents specially used for pipelines. For example, the publication date is September 23, 2015, and the publication number is CN104925964A. In the Chinese patent, a pipeline descaling agent is disclosed. The pipeline descaling agent includes sodium phosphate 5-15 %, Polyacrylamide 6-17%, Polymaleic Anhydride 7-15%, Sodium Dodecylbenzene Sulfonate 4-11%, Hydroxy Ethylene Acid 7-11%, Amino Trimethylene Phosphonic Acid 6- 11%, acrylic acid binary copolymer 5-13%, gallic acid 4-8%, phenolic derivatives 7-11%, polyepoxysuccinic acid 3-5%, sodium stearate 2-6%, fungicide 3-7%, and 2-4% rust remover, the pipeline scale remover has complex components, is corrosive, has poor biodegradability, and is not friendly to the environment

Another example is that the publication date is September 01, 2010, and the publication number is CN101817598A in the Chinese patent, which discloses a thermal pipeline descaling cleaning solution, which is composed of phosphoric acid, sodium hypophosphite, oxalic acid, iso It is formulated with thiazolinone, ethylenediaminetetraacetic acid, penetrating agent, polyethylene glycol, urea, AEO-9 emulsifier, industrial salt and polymer composite surface treatment synergistic active agent. It also has complex components and is corrosive , poor biodegradability, unfriendly to the environment

[0004] To sum up, there is no descaling cleaning with simple ingredients, non-toxic, non-corrosive, green, biodegradable, and environmentally friendly.