scholarly journals THERMAL POWER PLANT ENVIRONMENTAL STUDIES

1972 ◽  
Vol 1 (13) ◽  
pp. 114
Author(s):  
M.J. Doyle ◽  
R.F. Cayot
Keyword(s):  
Magnetic Tape ◽  
Power Plants ◽  
Meteorological Data ◽  
Thermal Power ◽  
Water System ◽  
Cooling Water ◽  
Environmental Studies ◽  
Aerial Photographs ◽  
Thermal Power Plants ◽  
The Pacific

Once-through cooling water systems for thermal power plants offer an economical means of dissipating the differential energy of modern-day turbines. Before the decision to proceed with the design of a oncethrough cooling water system is made, a considerable study effort must be undertaken in order to determine that no harmful effects will accrue to the environment from the plant's operation. These studies must include: 1. A comprehensive literature search 2. Field investigations of the air and water 3. Analytical evaluation of the field data The Pacific Gas and Electric Company has been conducting environmental studies at its operating thermal power plants and at proposed sites since 1958. This paper describes the approach used by the Company in conducting environmental studies. Meteorological data were obtained from on-site sensors, stored on magnetic tape, and subsequently computer-processed. Oceanographic data in the form of water temperatures, salinity, and dissolved oxygen profiles, as well as current speed and direction, were obtained from surface vessels. Remote sensing systems were used to obtain dispersion and dilution information, sea-surface temperature data, and aerial photographs of flora indigenous to the study area. All remote-sensed data, except for the aerial photographs, were stored on magnetic tape, in flight, and later processed in the computer with graphic off-line printout.

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.

scholarly journals Global scenarios for significant water use reduction in thermal power plants based on cooling water demand estimation using satellite imagery

Nature Energy ◽  
2019 ◽  
Vol 4 (12) ◽  
pp. 1040-1048 ◽  
Author(s):  
Alena Lohrmann ◽  
Javier Farfan ◽  
Upeksha Caldera ◽  
Christoph Lohrmann ◽  
Christian Breyer
Keyword(s):  
Water Use ◽  
Satellite Imagery ◽  
Water Demand ◽  
Power Plants ◽  
Thermal Power ◽  
Cooling Water ◽  
Demand Estimation ◽  
Thermal Power Plants

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.

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