Simulation and Optimization of Multi-effect Distillation Coupled with Vapor Compression to Desalinate Oilfield Wastewater
An oilfield wastewater desalination treatment system combining multi- effect distillation (MED) and thermal vapor compression (TVC) or mechanical vapor compression (MVC) is proposed in this paper.The craft process model of the MED-VC system is developed by Aspen Plus.Based on the verified model,the influence of preheating pattern,wastewater temperature,number of effects,heating steam temperature,TVC ejecting location and operating steam pressure on performance ratio and specific heat transfer area are investigated,and it also makes a comparative study of MED.MED-TVC and MED-MVC system at different number of effects and heating steam temperature.The results show that MED-freshwater preheating has more advantages compared with steam preheating and no preheating system when wastewater temperature is under 35℃ ; performance of MED-MVC system is superior to MED and MED-TVC system especially at smaller number of effects and lower heating steam temperature.Performance ratio of MED-MVC system can reach 5.11 times of MED system and 3.34 times of MED-TVC system when the number of effects is three; there is an increasing of performance ratio by 7% approximately with the operating steam pressure changing from 0.4MPa to 0.7MPa and also increasing by 14% with the reasonable arrangement of TVC location.
Oilfield wastewater multi-effect distillation vapor compression Aspen Plus simulation
Zhou Yihui Jiang Fengyin Bi Mingshu Ren Jingjie Wang Yunan
School of Chemical Machinery, Dalian University of technology, Dalian 116024, China
国际会议
2013青岛国际脱盐大会(Qingdao International Conference 2013 on Desalination and Water Reuse)
青岛
英文
93-99
2013-06-25（万方平台首次上网日期，不代表论文的发表时间）