Antiscale and anticorrosive cleaning agent for boiler and its prepn

Abstract

The antiscale and anticorrosive cleaning agent is prepared through the processes of soaking tannin containing plant material, such as tea, in boiled water, filtering out dregs at 70-80 deg.c, adding sodium metaphosphate in certain proportion to dissolve, adding sodium pyrophosphate in certain proportion to dissolve, mixing homogeneously and filtering. The said cleaning agent can prevent boiler from forming scale and being oxidized by dissolved oxygen in water for long period.

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