【摘要】：隨著國民經(jīng)濟(jì)的發(fā)展，空分裝置大型化和低能耗化成為了未來發(fā)展趨勢。預(yù)冷流程作為空分裝置中一個(gè)重要的環(huán)節(jié)，其流程組織及單體設(shè)備性能對(duì)整個(gè)空分裝置影響重大，因此預(yù)冷流程也成為了一個(gè)熱門的研究課題。而空冷塔和水冷塔作為預(yù)冷流程的兩個(gè)核心部件，對(duì)其大型化和低能耗化的研究則成為了重中之重。圍繞這個(gè)主題，本文展開了以下幾個(gè)方面的研究。 以預(yù)冷流程的組織形式為出發(fā)點(diǎn)，分析了用戶對(duì)產(chǎn)品需求量不同對(duì)預(yù)冷流程組織形式影響。通過查閱文獻(xiàn)，分析對(duì)比兩大核心設(shè)備的三種傳熱傳質(zhì)理論模型，從而建立本文空冷塔、水冷塔的氣-水接觸傳熱數(shù)學(xué)模型�；贛Works平臺(tái)，使用統(tǒng)一建模語言Modelica語言，構(gòu)建結(jié)構(gòu)仿真程序。不僅簡化編程時(shí)間，同時(shí)增強(qiáng)了程序的可移植性。同時(shí)通過對(duì)比文獻(xiàn)數(shù)據(jù)和程序仿真結(jié)果，來驗(yàn)證程序的可靠性。 提出另一種數(shù)學(xué)建模，通過微元段內(nèi)能量守恒，傳熱速率方程和傳質(zhì)速率方程的迭代，不僅可以消除Merkel模型中氣-水物性為常量的假設(shè)，使數(shù)學(xué)模型更接近實(shí)際，而且還可以顯示塔內(nèi)溫濕度沿流動(dòng)方向的變化曲線。并對(duì)12萬空分裝置進(jìn)行實(shí)例仿真計(jì)算，同時(shí)分析了空分裝置操作計(jì)算時(shí)，工況變化時(shí)對(duì)空冷塔、水冷塔的溫濕度參數(shù)仿真模擬，并為變工況操作提出的一些可行性建議。
[Abstract]:With the development of national economy, large-scale air separation unit and low energy consumption become the trend of future development. As an important part of air separation unit, precooling process has great influence on the whole air separation unit, so the precooling process has become a hot research topic. Air cooling tower and water cooling tower as two core components of the precooling process, the study of its large scale and low energy consumption has become the most important. Around this theme, this article has carried out the following several aspects of research. Based on the organizational form of precooling process, the influence of different product demand on the organizational form of precooling process is analyzed. By referring to the literature and analyzing and comparing the three theoretical models of heat and mass transfer between the two core equipments, the mathematical model of gas-water contact heat transfer in the air-cooled tower and water-cooled tower is established in this paper. Based on the MWorks platform, the structure simulation program is constructed by using the Unified Modeling language (Modelica). It not only simplifies the programming time, but also enhances the portability of the program. At the same time, the reliability of the program is verified by comparing the literature data and the program simulation results. In this paper, another mathematical model is proposed. By iteration of energy conservation, heat transfer rate equation and mass transfer rate equation in microelement, not only the assumption that gas-water property is constant in Merkel model can be eliminated, but the mathematical model is closer to reality. The temperature and humidity curves along the flow direction can also be shown. At the same time, the temperature and humidity parameters of the air cooling tower and the water cooled tower are simulated when the operating conditions of the air separation unit are changed, and some feasible suggestions for the operation of the air separation unit are put forward.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TB657

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相關(guān)碩士學(xué)位論文 前2條

1 陳昭京;基于MWorks的空分系統(tǒng)預(yù)冷流程的研究與仿真[D];華中科技大學(xué);2014年

2 羅思璇;基于MWorks軟件的表面式蒸發(fā)器仿真與研究[D];華中科技大學(xué);2013年

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本文編號(hào)：2214161