Antiscale and anticorrosive cleaning agent for boiler and its prepn

Abstract

Boiler anti-scaling, anti-corrosion and descaling agent and its manufacturing method, after soaking tannin-containing plants (such as tea leaves) in boiling water for a period of time, filter and remove slag at a temperature of 70-80 degrees Celsius, and then add metaphosphoric acid according to the set composition ratio Sodium salt substances, after being completely dissolved, add sodium pyrophosphate according to the set composition ratio, and filter after dissolving and mixing evenly, that is, the boiler anti-scaling, anti-corrosion and descaling agent is obtained. Compared with the prior art, the present invention has the advantages of being used for long-term operation of the boiler, preventing the boiler from scaling, preventing the carbon steel from being oxidized and corroded by dissolved oxygen in water, and achieving the functions of scale removal, scale prevention and anticorrosion. , The advantages of convenient storage and use.

Description

Technical field: [0001] The utility model relates to a preparation for water treatment, in particular to a boiler anti-scaling and anti-corrosion preparation and a manufacturing and using method thereof. Background technique: [0002] As disclosed in Chinese patent application "90100592.4", the existing boiler anti-scaling, anti-corrosion and descaling agent is a powder composition composed of sodium metaphosphate, soda ash, tannic acid and quicklime. After the liquid composition is dissolved, add plant ash and caustic soda, filter to make mother liquor, then put it into boiler water in a certain proportion, use Ca(OH)2 to react with substances such as bicarbonate and magnesium bicarbonate contained in water to generate CaCO3 and Mg(OU)2 precipitates react with magnesium carbonate and magnesium chloride to form calcium salts (CaCO3, CaCL2), and make the CO2 gas in the water form CaCO3 precipitates. Soda ash in the medicine is mainly used to soften the hardness of calcium sal...

AI Technical Summary

Problems solved by technology

Although this kind of boiler anti-scaling, anti-corrosion and descaling agent can separate most of the substances containing C elements in the water, and form a layer of anti-scaling film on the inner wall of the boiler, but because of the boiler anti-scaling, anti-corrosion and descaling agent Contains a large amount of Ca2+ ions, the water in the boiler is easy to absorb CO2 in the air during the circulation process, CO2 combines with water and Ca2+ in the water to form Ca(HCO3)2, Ca(HCO3)2 is easy to generate CaCO3 at high temperature and adsorbed on The formation of scale on the boiler wall is not conducive to the scale prevention and descaling of the boiler. In addition, because the above preparation contains a large amount of quicklime, it is easy to agglomerate after a long storage time, and the above preparation is not easy to dissolve, so it is very inconvenient to use