Intelligent purification system for circulating water of indirect air cooling system and use method of intelligent purification system

Abstract

The invention discloses an intelligent purification system for circulating water of an indirect air cooling system and a use method of the intelligent purification system, and aims to purify indirectair cooling circulating water by using a water treatment workshop of a power plant so as to slow down and inhibit corrosion of materials in the indirect air cooling system. The intelligent purification system comprises a pipeline booster pump, a strong magnetic iron remover, a water quality monitoring device, an intelligent control device, a flow control valve and the like, wherein the water quality monitoring device comprises an online conductivity meter, an online turbidity meter and an online pH value meter. The intelligent purification system takes water from a circulating water pipeline of the indirect air cooling system, the circulating water is conveyed to the water treatment workshop through the pipeline, and the intelligent control device sets a purification scheme according to awater quality result measured by the water quality monitoring device. Under the condition of not additionally arranging water treatment equipment, the parameters such as turbidity, conductivity and pHof the indirect air cooling circulating water can be effectively controlled within the target value ranges, the water quality is kept stable, the corrosivity of the indirect air cooling circulating water is reduced, and corrosion of carbon steel and pure aluminum in the indirect air-cooling system is effectively relieved.

Description

technical field [0001] The invention relates to the field of corrosion protection for thermal power plant equipment materials, in particular to an intelligent purification system for circulating water in an indirect air cooling system and a method for using the same. Background technique [0002] SCAL type indirect air-cooled unit has gradually become the main model of thermal power due to its water-saving characteristics. This type of indirect air-cooling system uses about 10,000 tons of desalinated water as circulating water. Due to the small buffer capacity of desalinated water and the lack of any water purification device in the system, the pH, conductivity and turbidity of circulating water often increase abnormally. The increase in pH exacerbates the corrosion of aluminum radiators; the increase in conductivity indicates that the concentration of impurity ions in the system increases, and the aggressive ions (Cl - and SO 4 2- ) will aggravate the corrosion rate of c...

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Problems solved by technology

However, this kind of treatment device cannot effectively control the conductivity and turbidity of circulating water, and it cannot slow down the oxygen corrosion suffered by carbon steel and aluminum pipes and the erosion corrosion of aluminum pipe nozzles, and it is difficult to comprehensively treat the materials in the system. form protection

[0005] Related patent applications have proposed using condensate polishing to treat the mixed bed or the spare resin of the condensate polishing mixed bed to make the mixed bed to purify the indirect air-cooled circulating water. However, the indirect air-cooled circulating water contains more carbon steel corrosion products. If it is directly used Mixed bed treatment, carbon steel corrosion products in the water may cause premature failure of the mixed bed, cannot fully exert the effect of the mixed bed to remove impurity ions, and even affect the quality of condensed water

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