نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشجوی کارشناسی ارشد دانشکده ی مهندسی مکانیک دانشگاه گیلان
2 گیلان*مهندسی مکانیک
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Brine Concentration using ZLD process is a comprehensive process in terms of simulation and it has an effective role in reducing environmental pollution due to the desalination plant wastewater. In this study, the governing equations, for components of feed-forward forced convective falling film brine concentrators, with a customs number of effects and thermal vapor compression have been solved by using MATLAB software. The results of thermodynamic modeling of two-stage brine concentrator represented that 6.25 ton/hr feed with 90000 ppm concentration gives 5 ton/hr fresh water and 1.25 ton/hr wastewater with 450000 ppm concentration. The GOR of this plant is 2.63 and the SHSA is 74.3 m2s/kg. Also, by Thermo-hydraulic modeling, to control the sediment rate with the limitations of allowable pressure drop and stream velocity for different tube lengths and diameters and evaporator number of the passes, heat transfer surface area and the number of tubes have been calculated. At the end the effects of design variables on GOR and SHSA are investigated. The results represented that number of effects, feed and motive vapor temperature are the three most important variables since increasing the number of effects causes 17% increase in efficiency and 23.5% increase in SHSA. Increasing 1 ֯C in feed and motive vapor temperature lead to 2.5% increase and 3% decrease in SHSA. But these two don’t have any effect on GOR.
کلیدواژهها [English]
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