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Membrane Water Treatment
  Volume 8, Number 4, July 2017 , pages 355-367
DOI: https://doi.org/10.12989/mwt.2017.8.4.355
 


Condenser cooling system & effluent disposal system for steam-electric power plants: Improved techniques
D. Sankar, M. Balachandar, T. Anbuvanan, S. Rajagopal, T. Thankarathi and N. Deepa

 
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.
 
Key Words
    condenser cooling system; effluent disposal system; steam-electric power plants; once-through cooling (OTC) system; closed-loop cooling system; cooling tower system; zero liquid discharge plant
 
Address
D. Sankar, S. Rajagopal, and T. Thankarathi: Development Consultants Private Limited, Consulting Engineers, Chennai, 600006, TN, India
M. Balachandar: Anna University, Guindy Campus, Chennai, 600025, Tamil Nadu, India
T. Anbuvanan: MN Dastur & Company Private Limited, Nandanam, Chennai, 600035, TN, India
N. Deepa: Presidency College (Autonomous), Chennai, 600005, Tamil Nadu, India
 

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