نوع مقاله : مقاله پژوهشی
نویسندگان
دانشکده مهندسی مکانیک، دانشگاه صنعتی شاهرود، شاهرود، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Zero liquid discharge processes have been proposed, in which all solid materials are separated from water and the system's output is only water and salt with low humidity.Zero liquid discharge systems can also be used to recover valuable resources from some industrial wastewater. In this study, a crystallizer system with forced circulation is studied in the thermal ZLD, where fresh water is produced by desalination of high-salinity water. The innovation and the main goal of the research is the thermodynamic and experimental investigation of the effects of the incoming effluent flow and the energy consumption of the heat exchanger on the rate of freshwater production, recovery ratio, output slurry rate, and solid salt production. First, modeling of the thermodynamic process in a steady state has been done. Then, a crystallizer is built on a laboratory scale and the results of the model are compared and validated with the obtained experimental data. The effect of changes in feed temperature and heat consumption of the heat exchanger on the performance coefficient of the system was investigated. The best design point, which represents the highest COP of the system, is obtained for a feed temperature of 40°C and a heat consumption of 6.7 kW for a production rate of 10.25 kg/h of fresh water, which represents a specific energy consumption of approximately 0.65 kWh/kg.
کلیدواژهها [English]
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