Technical analysis of increasing the concentration ratio and sewage reuse of circulating cooling water in power plants

2020 ◽  
Vol 189 ◽  
pp. 74-88
Author(s):  
Shuangchen Ma ◽  
Lan Ma ◽  
Chang Liu ◽  
Yao Sun ◽  
Haoruo Xing
Keyword(s):  
Concentration Ratio ◽  
Power Plants ◽  
Cooling Water ◽  
Technical Analysis ◽  
Circulating Cooling Water ◽  
Sewage Reuse

Study on Corrosion Resistance of Brass in Circulating Cooling Water with Different Concentration Ratio

2012 ◽  
Vol 511 ◽  
pp. 70-73
Author(s):  
Yu Chun Li ◽  
Xiao Wei Liu ◽  
Rui Feng Zhang ◽  
Kang Juan ◽  
Fan Gao
Keyword(s):  
Weight Loss ◽  
Corrosion Resistance ◽  
Concentration Ratio ◽  
Water System ◽  
Cooling Water ◽  
Cooling Water System ◽  
Circulating Cooling Water ◽  
Weight Loss Method ◽  
Ratio Condition ◽  
Loss Method

Abstract: The corrosion resistance of brass H70-1A cooling water was studied through weight-loss method and electrochemistry measurement in different concentration ratio condition. The results obtained from this study showed that brass inhibitor was necessary to add to circulating cooling water system when concentration ratio was in the range of 3~7.

The Development of Device for On-Line Monitoring Circulating Cooling Water Stability

2014 ◽  
Vol 672-674 ◽  
pp. 1743-1747
Author(s):  
Li Qiang Zhang ◽  
Mo Jie Sun ◽  
Ting Zhang ◽  
Zhao Li ◽  
Huan Wei Wang
Keyword(s):  
Power Plants ◽  
Cooling Water ◽  
Stability Index ◽  
Scientific Basis ◽  
Water Quantity ◽  
Water Stability ◽  
Circulating Cooling Water ◽  
On Line ◽  
The Stability ◽  
And Control

China is a country lacking of freshwater. With the water pollution from bad to worse, saving water become a serious matter which needs to be settled at once. In order to ensure the system working safely and the water quality, most power plants enable the circle cooling water to work in the low consistence, need more drainage and complement water which will make large waste of water. The good water quantity means that the water doesn’t make the furring and make cautery to the equipment. So we can improve the concentrated multiples of the cycle cooling water to save the water. Based on the specialty of the water used in the power plants, this subject study how to estimate the stability, doing the instrument and watching the stability degree, providing the scientific basis for disposing the circling water. After lots of experiments, we use the stability index as the estimation and use the pH determination as the alkalinity determination.The instrument uses the date collecting card to collect and use computer to dispose the date and control the instrument. The system inspects the stability of the cycle cooling water real time automatically.

Research and Discussion on Electro-Magnetic Treatment in Circulating Cooling Water of Power Plant

2013 ◽  
Vol 732-733 ◽  
pp. 382-386
Author(s):  
Ni Zhang Xiao ◽  
Nan Zhang Xiao ◽  
Long Wu Wen ◽  
Rui Ju Zhao ◽  
Chun Lei Zhang
Keyword(s):  
Power Plant ◽  
Chemical Treatment ◽  
Power Plants ◽  
Water System ◽  
Cooling Water ◽  
Magnetic Treatment ◽  
Treatment Technology ◽  
Cooling Water System ◽  
Circulating Cooling Water ◽  
Electro Magnetic

The effects of anti-scale, anti-corrosion and disinfection of circulating cooling water with electro-magnetic treatment and chemical treatment in the laboratory are compared. The applications of electro-magnetic treatment in power plants are summarized and discussed. The results of both experiments and applications in power plants show that the electro-magnetic treatment can be used in particular conditions, but the development of electro-magnetic treatment technology is immature. This technology used in circulating cooling water system in power plants should be further proved by more experiments and field applications.

The Study on Water Conservation in Thermal Power Plants

2014 ◽  
Vol 675-677 ◽  
pp. 1716-1720 ◽  
Author(s):  
Jian Lei Zhou ◽  
Yu Yun Fu
Keyword(s):  
Water Conservation ◽  
Power Plants ◽  
Thermal Power ◽  
Water System ◽  
Cooling Water ◽  
Working Fluid ◽  
Feed Water ◽  
Thermal Power Plants ◽  
Transfer Energy ◽  
Circulating Cooling Water

As the main working fluid pair to transfer energy and cool down the equipment, water is used in a large amount in thermal power plants. It will promote water conservation and resource recycling if the water use is managed effectively in production and the wastewater, which come from circulating cooling water system, the pretreatment in boiler feed water preparation system, desalination system and condensate polishing system, is disposed and recycled well.

Study on Anti-Corrosion Performance of 20A & 316SS in Circulating Cooling Water with Different Concentration Ratio

2012 ◽  
Vol 549 ◽  
pp. 753-756
Author(s):  
Ding Ping Zhong ◽  
Kang Juan ◽  
Fan Gao ◽  
Heng Zheng
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Concentration Ratio ◽  
Corrosion Behaviour ◽  
Cooling Water ◽  
Corrosion Performance ◽  
Circulating Cooling Water ◽  
Ratio Condition ◽  
Effective Role ◽  
Positive Effect

The corrosion behaviour on 20A carbon steel and 316SS in cooling water were studied through weight-loss measurements in different concentration ratio condition. The results obtained from this study showed that inhibitors played obviously effective role for 20A material, while inhibitors had no any positive effect to 316SS material; and concentration ratio 3~7 range was suitable for protecting both 20A and 316SS materials in power plant.

scholarly journals Application of Chemical Crystallization Circulating Pellet Fluidized Beds for Softening and Saving Circulating Water in Thermal Power Plants

2019 ◽  
Vol 16 (22) ◽  
pp. 4576
Author(s):  
Ruizhu Hu ◽  
Tinglin Huang ◽  
Tianwei Wang ◽  
Huixin Wang ◽  
Xiao Long
Keyword(s):  
Power Plant ◽  
Concentration Ratio ◽  
Power Plants ◽  
Removal Rate ◽  
Thermal Power ◽  
Cooling Water ◽  
Water Hardness ◽  
Economic Benefits ◽  
Thermal Power Plants ◽  
Circulating Water

The circulating pellet fluidized bed (CPFB) softening method is a highly efficient and environmentally friendly softening technology that can be used to reduce water hardness during the pretreatment process of circulating water in thermal power plants. The performance of chemical crystallization CPFB reactors was tested for increasing the concentration ratio and softening the circulating water in a thermal power plant in Dingzhou, Hebei. The results show that usage of CPFB reactors removed water hardness and Ca2+ ions with efficiencies exceeding 60% and 90%, respectively. The size of the particles discharged from the reactors was approximately 1–3 mm, and the content of CaO in these particles was found to be greater than 50%. All the discharged particles were reused in the desulfurization system in the power plant. The operational cost of the CPFB system is US$0.074 per cubic meter of water. After adopting the proposed CPFB softening method in the Dingzhou Power Plant, the concentration ratio of the circulation cooling water was increased from 4.5 to more than 9. In addition, the amount of replenished water and sewage discharge were both reduced by 150 m3/h, and the amount of scale inhibitor used in the system was reduced by more than 30%. These improvements contribute to approximately US$200,000 in annual savings in the power plant. In summary, the CPFB softening method demonstrated a high hardness removal rate, strong economic benefits, and remarkable environmental and social benefits. Therefore, this method seems ideal for softening replenished circulating cooling water, increasing the concentration ratio of the water and achieving zero liquid discharge (ZLD) in thermal power plants.

Dynamic Simulation Study on Anti-Scaling Corrosion Inhibitors of Circulating Cooling Water for Thermal Power Plants

2012 ◽  
Vol 441 ◽  
pp. 772-776
Author(s):  
Mo Jie Sun ◽  
Peng Wang ◽  
Chun Guang Liu ◽  
Yu Han Shan ◽  
Chun Biao Zhang ◽  
...  
Keyword(s):  
Dynamic Simulation ◽  
Power Plants ◽  
Thermal Power ◽  
Cooling Water ◽  
National Standards ◽  
Test Method ◽  
Thermal Power Plants ◽  
High Concentration ◽  
Water Condition ◽  
Circulating Cooling Water

In order to choose one elixir from three anti-scaling inhibitors A, B and C that most suits for the circulating cooling water in thermal power plants under certain water condition, we used the dynamic simulation test method in this paper. Under high concentration rate (4.0), we comprehensively analyzed the three elixirs from the factors of their anti-scaling, corrosion and economical performances. According to the results, it was confirmed that elixir B displayed the relevant good properties for the water condition of the power plant. Meantime, the elixir components of the three elixirs were analyzed, and the results showed that all the indexes of them were in conformity with the national standards.

Study on Anti-Corrosion Behaviour of 304 Stainless Steel in Circulating Cooling Water

2012 ◽  
Vol 511 ◽  
pp. 74-77
Author(s):  
Yu Chun Li ◽  
Ya Jiang ◽  
Heng Zheng ◽  
Kang Juan ◽  
Xiao Wei Liu
Keyword(s):  
Weight Loss ◽  
Stainless Steel ◽  
Concentration Ratio ◽  
Corrosion Behaviour ◽  
Cooling Water ◽  
304 Stainless Steel ◽  
Circulating Cooling Water ◽  
Weight Loss Method ◽  
Ratio Condition ◽  
Loss Method

Abstract: The corrosion behaviour of 304SS in cooling water was studied through weight-loss method and electrochemistry measurements in different concentration ratio condition. The results obtained from this study showed that 304SS material was anti-corrosive with inhibitor when concentration ratio of circulating cooling water was 3 ~ 10, especially in CR 10 condition, and the advised CR running range was 3~10.

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