Scale and corrosion inhibitor suitable for reclaimed water reuse system

Abstract

The invention discloses a scale-corrosion inhibitor for a reclaimed water recycling system. The scale-corrosion inhibitor is prepared from polyepoxysuccinic acid, 2-phosphonobutane -1,2,4-tricarboxylic acid, alicyclic amine having 6 to 24 carbon atoms and nonionic surfaceactive agent sequentially by combination according to a ratio of 1 to 1.0-2.0 to 0.5-1.0 to 1.0-2.0. The water treatment agent has good scale-corrosion resistant effect and is applicable to contraindicated water sources and waters in awful conditions such as municipal wastewater. Water treated by the scale-corrosion inhibitor can be used as industrial circulating cooling water, and can be particularly used as circulating cooling water for condensers of a power plant, with effects of improving heat exchange rate, reducing equipment maintenance and prolonging the service life of equipment.

Description

1. Technical field [0001] The invention relates to a water treatment agent, in particular to an industrial circulating cooling water treatment agent, specifically a scale and corrosion inhibitor for treating reclaimed water reuse systems. 2. Background technology [0002] The condenser is a very important part of the thermal system. Through the condensation of the condenser, a certain degree of vacuum can be established and maintained at the exhaust port of the steam turbine, thereby improving the thermal efficiency of the steam turbine. In addition, through the condenser, the exhaust steam of the steam turbine is condensed into clean condensed water, so as to recover the working fluid and reuse it. The condenser uses water as the cooling medium. For the circulating cooling water system, scaling and corrosion caused by the water quality process conditions will lead to a sharp drop in heat exchange efficiency, shorten the service life of the condenser, affect the steam qualit...

AI Technical Summary

Problems solved by technology

However, the effect is poor for systems that use bad water such as reclaimed water reuse systems or polluted water sources as circulating cooling water. On the one hand, it is because of the high scaling and corrosive ion content in water bodies with poor water quality conditions such as reclaimed water and polluted water sources. Scaling and corrosion tendency is greater than that of general water sources; on the other hand, the above-mentioned harsh water bodies have high sediment content and high turbidity in water, which makes a large amount of chemicals adsorbed on suspended particles, and the effect of scale and corrosion inhibition is reduced; and reclaimed water or Polluted water sources and other harsh water bodies have high COD and BOD content, COD can reach about 50mg / L, BOD 5 It can reach about 20mg / L, and the microbial reproduction is more severe than that in ordinary water bodies. These have led to the decline in the performance of general scale and corrosion inhibitors in harsh water bodies such as reclaimed water reuse systems or polluted water sources, and the scale and corrosion inhibition effects are poor.

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