第46卷第5期
NTALPROTE
安全与环保
石油与天然气化工
CHEMICAL ENGINEERING OF OIL & GAS
MVR系统非稳态热力学模拟
王远李永胜姜杰肖泽仪
四川大学化学工程学院
摘要建立了机械蒸汽再压缩系统的热力学模型，并对换热器无相变瞬态传热分析的模型进行了简化。在此基础上以加热后的料液显热作为启动热源，以稳态计算数据为基础，利用选代法对系统非稳态运行过程进行了模拟。结果表明：在闪蒸阶投，系统内蒸汽流量增长较快，当换热量达到蒸发器换热的最大值时，蒸汽流量出现明显拐点，并呈下降趋势直至稳态；系统约在2500$后达到稳态运行。压缩机最大功率及最大进气量均出现在非稳态运行过程中，与稳态值相比，分别高出41.89%和 32.56%
关键词机械蒸汽再压缩非稳态热力学模型页岩气压裂返排液模拟
中图分类号：X741
文献标志码：A
D0I:10.3969/i.issn.1007-3426.2017.05.019
Unsteady thermodynamic simulation of MVR system
Wang Yuan,Li Yongsheng,Jiang Jie,Xiao Zeyi
School of Chemical Engineering, Sichuan Uniuersity , Chengdu, Sichuan, China
Abstract : In this study , a thermodynamic model of a mechanical vapor recompression system was established, and the no phase change transient heat transfer model of heat exchanger was simplified . Further unsteady running progress using sensible heat of heated feed liquid as starting heat source was simulated by using iterative method based on steady state calculation data . The results showed that the vapor flow rate would grow rapidly at the beginning , forming an apparent inflection point when the heat exchange reaches the maximum state. Thereafter the flow rate would gradually decrease to the steady state after slowly increasing to the maximum value. Eventually, this progress would last for about 2 5o0 seconds. Both the maximal compressor power and the maximal compressor intake flowrate would achieve during the unsteady running progress ,which are 4l .89% and 32.56% higher than the steady state value, respectively .
Key words: mechanical vapor recompression, unsteady state, thermodynamic model, shale gas fracturing flow-back fluid,simulation
机械蒸汽再压缩（mechanicalvaporrecompres sion，简称MVR)技术通过引入蒸汽压缩机回收利用二次蒸汽的潜热，提高了系统能源效率，相比传统蒸发技术可显著降低运行成本11-3]，其广泛应用于海水淡
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化、制盐、废水处理等领域，是国家重点推广的节能技术之—4]
作为国内科学研究和工业应用的重点项目，MVR 技术已经进入快速发展时期5」。Zhou等-以2%硫
基金项目：国家科技支撑计划项目(2013BAC12B01)：四川大学德阳校市科技合作专项基金“页岩气钻采污水处理撬”(HZYF201513)。
作者简仓需避（1990一），男，硕士生，主要从事页岩气压裂返排液脱盐处理的相关研究。E-mail：1181072604@qq-com 通信作署率仪（1960一），男，四川大学教投，博士生导师，主要研究方向为过滤与分离。E-mail：mgck@scu.edu.cn