Datang Huainan Tianjiayu Power Plant and Shanghai Electric Power College have cooperated to adopt the new technology of “internal cold water quality control of dual-water internal cooling generatorsâ€, and successfully reconstructed the cold water system in Unit 3, completely eliminating the copper content in the cold water of the generator. High, threatening the potential accidents of the safe operation of the unit. Since it was put into operation on January 18th, the system has been safe and stable. Not only has the quality of the internal cold water reached the standard, but also achieved zero water replenishment, saving 500,000 yuan per year.
The low temperature of the generator cooling water and the copper content will cause corrosion of the hollow core copper wire, the wire is blocked, and the temperature of the generator coil rises, causing a major accident of burning the generator. Therefore, the copper content of the generator cooling water must be reduced during operation. In the past, the No. 3 unit of Tianjiayu Power Plant adopted the water replacement method for the water-cooled box, and the water replenishment rate was high. If the monitoring was improper, the generator cooling water would be interrupted. In order to overcome this difficulty, the plant and the Shanghai Electric Power College jointly researched and developed a equipment transformation plan, and invested 250,000 yuan to implement a major renovation project of the internal cold water system. According to the working principle of the internal cold water quality control system of the dual-water internal cooling generator, on the one hand, the high-value condensate of the power plant is used to neutralize the CO2 in the cooling water to increase the pH value and suppress the corrosion of the hollow core copper wire. In terms of the use of four copper removal columns to remove residual copper ions in the water, so that the quality of the internal cold water meets the eligibility criteria. At the same time, the excess water is recycled after being treated and up to standard. The system has high reliability, stable operation, no manual operation, no need to add any chemicals, and saves production costs.
The low temperature of the generator cooling water and the copper content will cause corrosion of the hollow core copper wire, the wire is blocked, and the temperature of the generator coil rises, causing a major accident of burning the generator. Therefore, the copper content of the generator cooling water must be reduced during operation. In the past, the No. 3 unit of Tianjiayu Power Plant adopted the water replacement method for the water-cooled box, and the water replenishment rate was high. If the monitoring was improper, the generator cooling water would be interrupted. In order to overcome this difficulty, the plant and the Shanghai Electric Power College jointly researched and developed a equipment transformation plan, and invested 250,000 yuan to implement a major renovation project of the internal cold water system. According to the working principle of the internal cold water quality control system of the dual-water internal cooling generator, on the one hand, the high-value condensate of the power plant is used to neutralize the CO2 in the cooling water to increase the pH value and suppress the corrosion of the hollow core copper wire. In terms of the use of four copper removal columns to remove residual copper ions in the water, so that the quality of the internal cold water meets the eligibility criteria. At the same time, the excess water is recycled after being treated and up to standard. The system has high reliability, stable operation, no manual operation, no need to add any chemicals, and saves production costs.
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