多效MVR蒸发浓缩水处理系统研究

doi:10.19965/j.cnki.iwt.2021-1016

摘要/Abstract

摘要：

基于自热回收技术的多效MVR蒸发浓缩水处理系统是降低零液排放成本的有效技术方法。设计了带有过热消除器和新鲜蒸汽补给的多效MVR系统，利用Aspen Plus系统仿真软件进行了模型建立与验证，并以氯化钙溶液为例，对各效MVR系统进行了仿真研究与分析。能耗分析表明，多效MVR系统的压缩机功率随效数的增加而降低，多效MVR系统的新鲜蒸汽消耗量随效数的增加而增加；经济性分析表明，综合各效MVR系统的复杂程度、操作控制难度、初期投资成本和运行成本，二效MVR系统将是一个比较好的选择；采用能量增益效率GOR_MVR作为热力学效率指标对各效MVR系统进行衡量，结果表明增加系统效数，系统GOR_MVR会降低。基于以上分析结果，提出多效MVR系统耦合新能源蒸汽发生装置将是未来零液排放水处理技术较好的发展方向。

关键词: 零液排放, 多效MVR, Aspen Plus, 经济性分析, GOR_MVR

Abstract:

The multi-effect MVR evaporation and concentration water treatment system based on self-heat recovery technology is an effective technical method to reduce the cost of zero liquid discharge. A multi-effect MVR system with superheater eliminator and fresh steam supply was designed. The model was established and verified by using Aspen Plus system simulation software. Taking calcium chloride solution as an example，the simulation research and analysis of each effect MVR system were carried out. The energy consumption analysis showed that the compressor power of multi-effect MVR system decreased with the increase of effect number，and the fresh steam consumption of multi-effect MVR system increased with the increase of effect number. The economic analysis showed that considering the complexity，operation control difficulty，initial investment cost and operation cost of multi-effect MVR system，the two-effect MVR system would be a better choice. Using the energy gain efficiency GOR_MVR as the thermodynamic efficiency index to measure the multi-effect MVR system，the results showed that the GOR_MVR of the system would decrease with the increase of effect number. Based on the above analysis results，it was proposed that the multi-effect MVR system coupled with new energy steam generator would be a better development direction of zero liquid discharge water treatment technology in the future.

Key words: zero liquid discharge, multi-effect MVR, Aspen Plus, economic analysis, GOR_MVR

中图分类号:

TQ028.61

沈九兵, 谭牛高, 肖艳萍, 李志超. 多效MVR蒸发浓缩水处理系统研究[J]. 工业水处理, 2022, 42(7): 147-153.

Jiubing SHEN, Niugao TAN, Yanping XIAO, Zhichao LI. Study on multi-effect MVR evaporation concentrated water treatment system[J]. Industrial Water Treatment, 2022, 42(7): 147-153.

https://www.iwt.cn/CN/Y2022/V42/I7/147

图/表 12

图1 三级MVR系统 1—离心泵；2~4—预热器；5~7—蒸发器；8~10—水蒸气压缩机

Fig. 1 Three level MVR system

图2 一效MVR系统 1—离心泵；2—预热器；3—蒸发器；4—过热消除器；5—水蒸气压缩机

Fig. 2 One-effect MVR system

图3 三效MVR系统 1—离心泵；2~4—预热器；5—混合器；6—水蒸气压缩机；7—第一蒸发器；8—第二蒸发器；9—第三蒸发器；10—过热消除器；11~12—减压阀

Fig. 3 Three-effect MVR system

图4 三效MVR系统水蒸气压焓

Fig. 4 Water vapor pressure-enthalpy diagram of three-effect MVR system

图5 三效MVR模拟图 P1—离心泵；H1~H9—换热器；H10—过热消除器；M1—混合器；F1—第一蒸发器；F2—第二蒸发器；F3—第三蒸发器；C1—水蒸气压缩机；V1~V2—减压阀

Fig. 5 Three-effect MVR simulation diagram

表1 模拟结果和实验结果与设计参数对比

Table 1 Comparison between simulation results，experimental results and design parameters

项目	进料流量/（kg·h^-1）	进料质量分数/%	进料温度/℃	冷凝温度/℃	出料质量分数/%	蒸发水量/（kg·h^-1）	沸点温升/℃	蒸发侧压力/kPa	冷凝侧压力/kPa	传热温差/℃	压缩机功率/W
设计参数	25	2	78	86	10	20	1	47.37	60.12	5	307
实验结果	24	2	78	86.3	10	20	1	48.55	61.8	5.2	1 000
模拟结果	25	2	78	85.98	10	19.7	1	47.37	60.12	5.17	307
实验与设计参数误差/%	4	0	0	0.34	0	0	0	2.5	2.8	4	326
模拟与设计参数误差/%	0	0	0	-0.02	0	-1.5	0	0	0	3.4	0

图6 氯化钙溶液泡点温度与溶液中氯化钙质量分数的关系

Fig. 6 Relationship between bubble point temperature of calcium chloride solution and mass fraction of calcium chloride in solution

表2 仿真过程主要的压力参数设定值

Table 2 Set values of main pressure parameters in the simulation process

参数	一效MVR系统	二效MVR系统	三效MVR系统	四效MVR系统	五效MVR系统
第一蒸发器压力/kPa	50	85	105	130	150
第二蒸发器压力/kPa	—	50	85	105	125
第三蒸发器压力/kPa	—	—	50	85	100
第四蒸发器压力/kPa	—	—	—	50	80
第五蒸发器压力/kPa	—	—	—	—	50
新鲜饱和蒸汽压力/kPa	—	105	130	156.5	182.5

图7 多效MVR模拟运行结果

Fig. 7 Multi-effect MVR simulation operation results

表3 电费和工业水蒸气价格4种方案组合

Table 3 Combination of four schemes of electricity charge and industrial steam price

方案	1	2	3	4
水蒸气价格/（元·t^-1）	150	250	150	250
电费/（元·kW^-1·h^-1）	0.7	0.7	1	1

图8 多效MVR系统经济性分析

Fig. 8 Economic analysis of multi-effect MVR system

图9 多效MVR系统GOR_MVR分析

Fig. 9 GOR_MVR analysis of multi-effect MVR system

参考文献 29

1	VARIS O， VAKKILAINEN P. China’s 8 challenges to water resources management in the first quarter of the 21st Century［J］. Geomorphology，2001，41（2/3）：93-104. doi:10.1016/s0169-555x(01)00107-6
2	刘丹，刘琼琼，周滨，等. 工业高盐废水零排放与资源化利用的研究进展［J］. 现代化工，2021，41（10）：19-22.
	LIU Dan， LIU Qiongqiong， ZHOU Bin，et al. Research progress on zero discharge and utilization of high salinity industrial wastewater［J］. Modern Chemical Industry，2021，41（10）：19-22.
3	HUANG Runyao， SHEN Ziheng， WANG Hongtao，et al. Evaluating the energy efficiency of wastewater treatment plants in the Yangtze River Delta：Perspectives on regional discrepancies［J］. Applied Energy，2021，297（C）：S0306261921005389. doi:10.1016/j.apenergy.2021.117087
4	ALNOURI S Y， LINKE P， EL-HALWAGI M M. Accounting for central and distributed zero liquid discharge options in interplant water network design［J］. Journal of Cleaner Production，2018，171：644-661. doi:10.1016/j.jclepro.2017.09.236
5	TONG Tiezheng， ELIMELECH M. The global rise of zero liquid discharge for wastewater management：Drivers，technologies，and future directions［J］. Environmental Science & Technology，2016，50（13）：6846-6855. doi:10.1021/acs.est.6b01000
6	AZIMIBAVIL S， JAFARIAN A. Heat transfer evaluation and economic characteristics of falling film brine concentrator in zero liquid discharge processes［J］. Journal of Cleaner Production，2021，285：124892. doi:10.1016/j.jclepro.2020.124892
7	MANSOUR F， ALNOURI S Y， AL-HINDI M，et al. Screening and cost assessment strategies for end-of-pipe Zero Liquid Discharge systems［J］. Journal of Cleaner Production，2018，179：460-477. doi:10.1016/j.jclepro.2018.01.064
8	XU Jun， XIE Junxian， CHENG Zheng，et al. Source apportionment of pulping wastewater and application of mechanical vapor recompression：Environmental and economic analyses［J］. Journal of Environmental Management，2021，292：112740. doi:10.1016/j.jenvman.2021.112740
9	ZHOU Yasu， SHI Chengjun， DONG Guoqiang. Analysis of a mechanical vapor recompression wastewater distillation system［J］. Desalination，2014，353：91-97. doi:10.1016/j.desal.2014.09.013
10	YANG Junling， ZHANG Chong， ZHANG Zhentao，et al. Electroplating wastewater concentration system utilizing mechanical vapor recompression［J］. Journal of Environmental Engineering，2018，144（7）：04018053. doi:10.1061/(asce)ee.1943-7870.0001380
11	ELSAYED M L， WU Wei， CHOW L C. High salinity seawater boiling point elevation：Experimental verification［J］. Desalination，2021，504：114955. doi:10.1016/j.desal.2021.114955
12	HAN Dong， HE Weifeng， YUE Chen，et al. Study on desalination of zero-emission system based on mechanical vapor compression［J］. Applied Energy，2017，185：1490-1496. doi:10.1016/j.apenergy.2015.12.061
13	HAN Dong， YUE Chen， HE Weifeng，et al. Energy saving analysis for a solution evaporation system with high boiling point elevation based on self-heat recuperation theory［J］. Desalination，2015，355：197-203. doi:10.1016/j.desal.2014.10.044
14	LIANG Lin， HAN Dong， MA Ran，et al. Treatment of high-concentration wastewater using double-effect mechanical vapor recompression［J］. Desalination，2013，314：139-146. doi:10.1016/j.desal.2013.01.016
15	YUE Chen， WANG Bin， ZHU Banshou. Thermal analysis for the evaporation concentrating process with high boiling point elevation based exhaust waste heat recovery［J］. Desalination，2018，436：39-47. doi:10.1016/j.desal.2018.02.010
16	刘燕，裴程林，王建达，等. 高沸点升溶液蒸发系统的设计与分析［J］. 过程工程学报，2017，17（4）：859-865.
	LIU Yan， PEI Chenglin， WANG Jianda，et al. Design and analysis of an evaporation system of solutions with high boiling point elevation［J］. The Chinese Journal of Process Engineering，2017，17（4）：859-865.
17	VON EIFF D， WONG P W， GAO Yonggang，et al. Technical and economic analysis of an advanced multi-stage flash crystallizer for the treatment of concentrated brine［J］. Desalination，2021，503：114925. doi:10.1016/j.desal.2020.114925
18	JIANG Jun， YANG Houwen， LIU Feng，et al. Analysis of thermal and water equilibrium and desulfurization efficiency after waste heat recovered from a wet flue gas desulfurization system［J］. Asia-Pacific Journal of Chemical Engineering，2020，15（2）：e2413. doi:10.1002/apj.2413
19	DOGBE E S， MANDEGARI M， GÖRGENS J F. Assessment of the thermodynamic performance improvement of a typical sugar mill through the integration of waste-heat recovery technologies［J］. Applied Thermal Engineering，2019，158：113768. doi:10.1016/j.applthermaleng.2019.113768
20	GAO Xiaoxin， GU Qiang， MA Jiangquan，et al. MVR heat pump distillation coupled with ORC process for separating a benzene-toluene mixture［J］. Energy，2018，143：658-665. doi:10.1016/j.energy.2017.11.041
21	HAN Dong， HE Weifeng， YUE Chen，et al. Analysis of energy saving for ammonium sulfate solution processing with self-heat recuperation principle［J］. Applied Thermal Engineering，2014，73（1）：641-649. doi:10.1016/j.applthermaleng.2014.08.026
22	裴程林，赵桂锋，张少峰，等. 分级压缩MVR系统分析［J］. 节能，2018，37（9）：78-82.
	PEI Chenglin， ZHAO Guifeng， ZHANG Shaofeng，et al. Exergy analysis of hierarchical compression MVR system［J］. Energy Conservation，2018，37（9）：78-82.
23	姜华，张子尧，宫武旗. MVR并联双效蒸发结晶系统设计及研究［J］. 化工进展，2019，38（10）：4461-4469. doi:10.1016/j.applthermaleng.2020.115646
	JIANG Hua， ZHANG Ziyao， GONG Wuqi. Design and research of MVR parallel double-effect evaporation crystallization system［J］. Chemical Industry and Engineering Progress，2019，38（10）：4461-4469. doi:10.1016/j.applthermaleng.2020.115646
24	LI Yahui， ZHANG Xiaofei， WANG Yilin，et al. Feasibility study of multi-effect distillation dealing with high-salinity organic RO concentrates：Experiment and theoretical analysis［J］. Desalination，2021，505：115007. doi:10.1016/j.desal.2021.115007
25	LI Shuangfei， LIU Zhenhua， SHAO Zhixiong，et al. Performance study on a passive solar seawater desalination system using multi-effect heat recovery［J］. Applied Energy，2018，213：343-352. doi:10.1016/j.apenergy.2018.01.064
26	ZEJLI D， OUAMMI A， SACILE R，et al. An optimization model for a mechanical vapor compression desalination plant driven by a wind/PV hybrid system［J］. Applied Energy，2011，88（11）：4042-4054. doi:10.1016/j.apenergy.2011.04.031
27	GUDE V G. Energy storage for desalination processes powered by renewable energy and waste heat sources［J］. Applied Energy，2015，137：877-898. doi:10.1016/j.apenergy.2014.06.061
28	MACEDONIO F， KATZIR L， GEISMA N，et al. Wind-aided intensified evaporation（WAIV） and membrane crystallizer（MCr） integrated brackish water desalination process：Advantages and drawbacks［J］. Desalination，2011，273（1）：127-135. doi:10.1016/j.desal.2010.12.002
29	ZHANG Xiaodong， HU Dapeng， LI Zhiyi. Performance analysis on a new multi-effect distillation combined with an open absorption heat transformer driven by waste heat［J］. Applied Thermal Engineering，2014，62（1）：239-244. doi:10.1016/j.applthermaleng.2013.09.015

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