Membrane and Water Treatment

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Condenser cooling system & effluent disposal system for steam-electric power plants: Improved techniques

  • Sankar, D. (Development Consultants Private Limited, Consulting Engineers) ;
  • Balachandar, M. (Anna University, Guindy Campus) ;
  • Anbuvanan, T. (MN Dastur & Company Private Limited) ;
  • Rajagopal, S. (Development Consultants Private Limited, Consulting Engineers) ;
  • Thankarathi, T. (Development Consultants Private Limited, Consulting Engineers) ;
  • Deepa, N. (Presidency College (Autonomous))
  • Received : 2016.08.04
  • Accepted : 2017.01.26
  • Published : 2017.07.25
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Abstract

In India, the current operation of condenser cooling system & effluent disposal system in existing power plants aims to reduce drawal of seawater and to achieve Zero Liquid Discharge to meet the demands of statutory requirements, water scarcity and ecological system. Particularly in the Steam-Electric power plants, condenser cooling system adopts Once through cooling (OTC) system which requires more drawal of seawater and effluent disposal system adopts sea outfall system which discharges hot water into sea. This paper presents an overview of closed-loop technology for condenser cooling system and to achieve Zero Liquid Discharge plant in Steam-Electric power plants making it lesser drawal of seawater and complete elimination of hot water discharges into sea. The closed-loop technology for condenser cooling system reduces the drawal of seawater by 92% and Zero Liquid Discharge plant eliminates the hot water discharges into sea by 100%. Further, the proposed modification generates revenue out of selling potable water and ZLD free flowing solids at INR 81,97,20,000 per annum (considering INR 60/Cu.m, 330 days/year and 90% availability) and INR 23,760 per annum (considering INR 100/Ton, 330 days/year and 90% availability) respectively. This proposed modification costs INR 870,00,00,000 with payback period of less than 11 years. The conventional technology can be replaced with this proposed technique in the existing and upcoming power plants.

Keywords

References

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