低溫多效蒸發(fā)海水淡化系統(tǒng)熱力性能分析與優(yōu)化研究
[Abstract]:With the rapid growth of population, the deepening of industrialization and urbanization, the improvement of living standards and the aggravation of environmental pollution, the shortage of fresh water resources has become a key factor restricting economic development. Chemical technology has attracted much attention from academia and engineering circles because of its advantages such as low energy consumption, high purity of product water, low dosage of chemical reagents and low risk of corrosion and scaling. Detailed analysis and accurate grasp of the thermal process are the basis for the development of optimal design technology of multi-effect evaporative seawater desalination unit. A comprehensive mathematical model of thermal process of LT-MEE seawater desalination system is established based on the database established by the sex experiment. The thermal performance analysis and optimization methods of the device are studied in depth. The purpose is to promote the formation of the theory of thermal performance analysis of LT-MEE seawater desalination device with complete scientific connotation and the development of advanced technology. Based on the first and second laws of mechanics, a comprehensive mathematical model for the thermal process of LT-MEE seawater desalination system is established. The model includes the thermal losses caused by the elevation of seawater boiling point and the flow resistance of steam through heat transfer tube bundles, demisters, steam passages and condensation process in tubes. The flow resistance and heat transfer coefficient are established by pertinent experiments. The validity and advancement of the mathematical model established in this paper are verified by comparing with the actual equipment and the data of the literature model. The parameters of secondary steam, salinity of concentrated brine, temperature, heat transfer coefficient and thermal loss are obtained by simulation calculation. The thermal process of LT-MEE seawater desalination system is analyzed in detail. The effects of feed mode, preheating mode and combination with thermodynamic vapor compressor (TVC) on the thermal performance of the system are discussed. The thermal performance and the distribution of the enthalpy loss of MEE and MEE-TVC systems are compared and analyzed. The results show that the thermal loss caused by flow resistance and boiling point increase has an important influence on the thermal performance of the system. Through the analysis of the thermal process, the thermal process characteristics of LT-MEE seawater desalination unit with "small temperature difference, low flow resistance, saturated state, high sensitivity" are summarized. Compared with MEE system, the water-making ratio of MEE-TVC system is significantly increased, and the specific cooling water volume and specific heat transfer area are reduced to varying degrees. In the optimization design of the system, the economic model of LT-MEE seawater desalination system, i.e. the detailed mathematical model of economic performance evaluation index-unit quality water production cost, is established based on the total revenue demand method. Then the response surface approximation model of the performance parameters of LT-MEE seawater desalination system is established based on the accurate thermodynamic process model. An improved multi-objective genetic algorithm (NSGA-II) is used to solve the traditional multi-objective optimization problem (maximum water-making ratio, maximum specific energy consumption and minimum unit quality water-making cost). The Pareto optimal solution set is obtained. The optimization based on different preferences is compared and analyzed in terms of objective function, design variables, (exergy) loss distribution and cost composition. The optimization results show that, for MEE-TVC seawater desalination system, compared with the initial scheme of the example, the scheme with the optimum thermodynamic performance selected from the Pareto optimal solution set has 44.6% higher water-making ratio, 26.7% lower exergy consumption and 13.7% lower water-making cost per unit quality of the scheme with the optimum economic performance. This shows that the optimization method adopted in this paper can achieve remarkable optimization results, and also shows the necessity of optimizing the design of low-temperature multi-effect evaporative seawater desalination system.
【學(xué)位授予單位】:大連理工大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2016
【分類號(hào)】:P747
【相似文獻(xiàn)】
相關(guān)期刊論文 前10條
1 ;技術(shù)前沿:太陽(yáng)能海水淡化系統(tǒng)專用救災(zāi)現(xiàn)場(chǎng)[J];硅谷;2011年08期
2 王永青;何宏舟;;海水淡化系統(tǒng)的性能優(yōu)化與評(píng)價(jià)準(zhǔn)則[J];化學(xué)工程;2012年02期
3 劉波;李娜;;平海電廠海水淡化系統(tǒng)介紹[J];科技風(fēng);2013年07期
4 賈海軍,李毅,肖志,李勝?gòu)?qiáng),仲朔平,姜?jiǎng)僖?張佑杰;與核供熱堆耦合的海水淡化系統(tǒng)及蒸發(fā)工藝研究[J];核動(dòng)力工程;2003年S2期
5 陳金增,宋振海,張青枝,黃素逸;熱力蒸汽壓縮式海水淡化系統(tǒng)熱力分析[J];海軍工程大學(xué)學(xué)報(bào);2005年04期
6 楊英俊 ,陳志莉 ,鄭宏飛 ,楊海平;全自然能源海水淡化系統(tǒng)[J];太陽(yáng)能;2005年02期
7 張福錄;李雪民;;反滲透法海水淡化系統(tǒng)的設(shè)計(jì)[J];一重技術(shù);2005年05期
8 張曉東;原郭豐;成珂;張鶴飛;;新型太陽(yáng)能海水淡化系統(tǒng)[J];水處理技術(shù);2006年06期
9 龐勝林;劉金生;;華能浙江分公司海水淡化系統(tǒng)研究[J];電力設(shè)備;2006年09期
10 高蓬輝;吳安民;成珂;張鶴飛;;基于神經(jīng)網(wǎng)絡(luò)的海水淡化系統(tǒng)產(chǎn)水模擬及預(yù)測(cè)[J];石油化工設(shè)備;2006年06期
相關(guān)會(huì)議論文 前7條
1 王許云;張林;陳歡林;高從X&;;太陽(yáng)能海水淡化系統(tǒng)開發(fā)進(jìn)展[A];第一屆海水淡化與水再利用西湖論壇論文集[C];2006年
2 龐勝林;劉金生;;海水淡化系統(tǒng)研究[A];提高全民科學(xué)素質(zhì)、建設(shè)創(chuàng)新型國(guó)家——2006中國(guó)科協(xié)年會(huì)論文集(下冊(cè))[C];2006年
3 王剛;周志瑩;顧為東;;利用非并網(wǎng)風(fēng)電進(jìn)行海水淡化系統(tǒng)的優(yōu)勢(shì)分析[A];新形勢(shì)下長(zhǎng)三角能源面臨的新挑戰(zhàn)和新對(duì)策——第八屆長(zhǎng)三角能源論壇論文集[C];2011年
4 劉曉華;趙廣斌;沈勝?gòu)?qiáng);曹國(guó)建;陳文博;;太陽(yáng)能海水淡化系統(tǒng)性能對(duì)比研究[A];高等學(xué)校工程熱物理第十九屆全國(guó)學(xué)術(shù)會(huì)議論文集[C];2013年
5 馮巍;;海水淡化系統(tǒng)與制氯系統(tǒng)聯(lián)動(dòng)運(yùn)行及邏輯優(yōu)化與設(shè)備節(jié)約探討[A];2013年中國(guó)電機(jī)工程學(xué)會(huì)年會(huì)論文集[C];2013年
6 肖麗;吳善宏;周佰魏;何先營(yíng);;海水淡化系統(tǒng)殺菌方式的優(yōu)化應(yīng)用[A];第四屆火電行業(yè)化學(xué)(環(huán)保)專業(yè)技術(shù)交流會(huì)論文集[C];2013年
7 王金華;胡黨輝;嚴(yán)俊杰;邵樹峰;劉繼平;;改進(jìn)型多級(jí)閃蒸海水淡化系統(tǒng)的經(jīng)濟(jì)性研究[A];中國(guó)動(dòng)力工程學(xué)會(huì)第三屆青年學(xué)術(shù)年會(huì)論文集[C];2005年
相關(guān)重要報(bào)紙文章 前7條
1 首席記者 邱麗娜;我省海水淡化系統(tǒng)項(xiàng)目成功投運(yùn)[N];黑龍江經(jīng)濟(jì)報(bào);2010年
2 本報(bào)記者 孫安然 朱_g;“全能”型海水淡化系統(tǒng)正式亮相[N];中國(guó)海洋報(bào);2013年
3 王友柏 記者 張瑋煒;紅沿河核電海水 淡化系統(tǒng)投入使用[N];大連日?qǐng)?bào);2010年
4 記者 王榮琦;國(guó)內(nèi)首個(gè)核電站海水淡化系統(tǒng)啟用[N];遼寧日?qǐng)?bào);2010年
5 劉婧婷 記者 張桂英 張斯文;我省海水淡化系統(tǒng)印尼投運(yùn)[N];黑龍江日?qǐng)?bào);2010年
6 記者 馮曉彤 通訊員 張存保;世界首例三工況低溫多效海水淡化系統(tǒng)成功應(yīng)用[N];首都建設(shè)報(bào);2011年
7 本報(bào)記者 吳德強(qiáng);太陽(yáng)和風(fēng)可淡化海水[N];北京科技報(bào);2004年
相關(guān)博士學(xué)位論文 前3條
1 韓冰;用于MEE海水淡化系統(tǒng)的蒸汽熱力壓縮機(jī)及混合可再生能源系統(tǒng)的研究[D];北京工業(yè)大學(xué);2015年
2 王芳;基于減壓膜蒸餾法太陽(yáng)能海水淡化系統(tǒng)研究[D];東華大學(xué);2016年
3 鄧潤(rùn)亞;海水淡化系統(tǒng)能量綜合利用與經(jīng)濟(jì)性研究[D];中國(guó)科學(xué)院研究生院(工程熱物理研究所);2009年
相關(guān)碩士學(xué)位論文 前10條
1 鄒維東;多級(jí)海水淡化系統(tǒng)裝置推廣研究[D];哈爾濱工程大學(xué);2012年
2 劉珩;四效蒸餾太陽(yáng)能海水淡化系統(tǒng)設(shè)計(jì)與實(shí)驗(yàn)研究[D];哈爾濱工業(yè)大學(xué);2012年
3 張新春;一種新型太陽(yáng)能自然真空海水淡化系統(tǒng)性能研究[D];大連理工大學(xué);2015年
4 朱鳴鳴;太陽(yáng)能增濕除濕海水淡化系統(tǒng)性能研究[D];大連理工大學(xué);2015年
5 馬原;一種海水淡化系統(tǒng)的自動(dòng)控制程序設(shè)計(jì)[D];吉林大學(xué);2016年
6 周婷;基于反滲透方法的新能源海水淡化系統(tǒng)研究[D];上海海洋大學(xué);2016年
7 陳樹旺;離網(wǎng)型風(fēng)光互補(bǔ)膜法海水淡化系統(tǒng)的優(yōu)化設(shè)計(jì)[D];集美大學(xué);2016年
8 郭麗江;熱電聯(lián)產(chǎn)海水淡化系統(tǒng)節(jié)能降耗分析[D];華北電力大學(xué)(北京);2005年
9 閆冬俠;海水淡化系統(tǒng)中超濾膜性能的研究[D];浙江工業(yè)大學(xué);2006年
10 王曉;超聲波輔助蒸發(fā)太陽(yáng)能海水淡化系統(tǒng)研究[D];青島理工大學(xué);2010年
,本文編號(hào):2233575
本文鏈接:http://sikaile.net/shoufeilunwen/jckxbs/2233575.html