Multifunctional protective agent for boiler water supply system and preparation method thereof

Abstract

The invention relates to a multifunctional protective agent for a boiler water supply system and a preparation method thereof. The protective agent comprises the following components expressed in mass percentage: 10 to 30% of cyclohexylamine, 5 to 15% of carbohydrazide, 10 to 20% of N-methyldiethanolamine, 1 to 5% of sodium humate and 20 to 75% of water, wherein the weight percentage of all the above-mentioned components sums to 100%. The protective agent provided by the invention is applicable to middle and low pressure boiler water supply processing systems and can effectively inhibit corrosion of a boiler, a furnace tube, a heat exchanger and a steam condensate system; the protective agent effectively controls stabilization of the pH value of water bodies in the boiler and the steam condensate system; and the protective agent effectively inhibits scale formation in the boiler, has stronger control and disperses generated scale which is then removed through pollution discharging by the boiler.

Description

technical field [0001] The invention relates to the field of anti-corrosion and anti-scaling in the field of chemical industry, in particular to a protective agent applied to a medium-low pressure boiler feed water system and a preparation method thereof. Background technique [0002] As a power or heat source, steam gradually cools down and turns into condensed water after doing work or exchanging heat. Theoretically, steam condensate is pure, high-quality water that does not cause any problems with its carrier. However, in practical applications, the steam contains more or less impurities, especially industrial steam contains a lot of gas impurities, which dissolve into the condensed water during the steam condensation process, and also dissolve into the condensed water during the transportation of the condensed water. A certain amount of gas will corrode the carrier of condensed water - heat exchange equipment and pipelines. Severe corrosion will cause a large amount of...

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Problems solved by technology

However, the existing agents have the following problems: chemical oxygen scavengers such as hydroxylamine will produce acidic substances in the later stage, thereby increasing the corrosion of the boiler; commonly used scale inhibitors are phosphates, but phosphates have hidden phosphorus, Can cause environmental problems, its discharge is restricted

[0007] The function of the boiler feed water treatment agent reported in previous patents is relatively single. In view of this, we have developed a protective agent suitable for the boiler feed water system. Compared with other commonly used protective agents, it can not only save a lot of water resources and heat, but also ensure the safe operation of boilers and steam systems

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