本文選題：連續(xù)攪拌釜式反應(yīng)器 + 雙冷卻��； 參考：《西安科技大學(xué)》2017年碩士論文

【摘要】：連續(xù)攪拌釜式反應(yīng)器(Continuous Stirred Tank Reactor,CSTR)是重要的化工生產(chǎn)裝備,其反應(yīng)溫度是該設(shè)備重要的控制參數(shù)。在實(shí)際化工生產(chǎn)中,CSTR溫度控制的品質(zhì)直接影響著產(chǎn)品質(zhì)量和生產(chǎn)安全,因此溫度控制一直受到專業(yè)技術(shù)人員的關(guān)注。本文主要研究如何對(duì)CSTR的溫控方案進(jìn)行優(yōu)化。本文以工業(yè)上淤漿法制聚丙烯為研究背景進(jìn)行CSTR的溫控研究。將傳統(tǒng)PID控制進(jìn)行分析,得出該系統(tǒng)方案的動(dòng)態(tài)特性只能基本滿足聚丙烯的工藝要求。為了能夠充分發(fā)揮CSTR的控制性能,先后對(duì)蛇管和夾套的冷卻特性加以分析,得出了蛇管的動(dòng)態(tài)響應(yīng)由于夾套,能夠更好的滿足聚丙烯的工藝要求本,但不利于經(jīng)濟(jì)效應(yīng)。為了使溫控系統(tǒng)能兼顧各自的優(yōu)勢(shì),從而引出雙重/閥位——串級(jí)控制方案,這種“雙冷卻”的控制思想有效的解決了這一問題,將蛇管和夾套兩種冷卻裝置協(xié)調(diào)使用。文中通過實(shí)驗(yàn)仿真對(duì)傳統(tǒng)PID控制與雙重/閥位——串級(jí)在動(dòng)態(tài)性能和節(jié)能降耗上進(jìn)行對(duì)比,驗(yàn)證了雙重/閥位——串級(jí)控制系統(tǒng)的優(yōu)越性。為了能進(jìn)一步提升控制性能,本文引入模糊PID自整定控制算法,替代雙重/閥位——串級(jí)控制系統(tǒng)主回路控制器的PID算法,從而能使改進(jìn)后的控制系統(tǒng)擁有更好的控制性能。仿真結(jié)果表明模糊控制算法運(yùn)用到雙重/閥位——串級(jí)控制回路中,能大幅度提高控制性能,使其超調(diào)量減少,調(diào)節(jié)時(shí)間變短,增加了系統(tǒng)的可靠性,對(duì)實(shí)際工業(yè)生產(chǎn)提供了理論意義和實(shí)用價(jià)值。
[Abstract]:Continuous Stirred Tank reactor (CSTR) is an important chemical equipment, and its reaction temperature is an important control parameter. The quality of CSTR temperature control has a direct impact on product quality and production safety in practical chemical production, so temperature control has been concerned by professional technicians. This paper mainly studies how to optimize the temperature control scheme of CSTR. In this paper, the temperature control of CSTR was studied on the background of industrial slurry polypropylene. By analyzing the traditional PID control, it is concluded that the dynamic characteristics of the system can only meet the process requirements of polypropylene. In order to give full play to the control performance of CSTR, the cooling characteristics of snake tube and jacket were analyzed successively, and it was concluded that the dynamic response of snake tube could better meet the technological requirements of polypropylene because of the jacket, but it was not conducive to economic effect. In order to make the temperature control system give consideration to their own advantages and bring out the double / valve position-cascade control scheme, this "double cooling" control idea effectively solves this problem, and the two cooling devices are used harmoniously. In this paper, the advantages of the dual / valve position cascade control system are verified by comparing the traditional PID control system with the dual / valve position cascade control system in terms of dynamic performance and energy saving and consumption reduction. In order to further improve the control performance, a fuzzy PID self-tuning control algorithm is introduced in this paper to replace the PID algorithm of the main loop controller of the dual / valve position cascade control system, so that the improved control system has better control performance. The simulation results show that the fuzzy control algorithm can greatly improve the control performance, reduce the overshoot, shorten the adjustment time and increase the reliability of the system by applying the fuzzy control algorithm to the double / valve position cascade control loop. It provides theoretical significance and practical value for practical industrial production.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ325.14;TP273

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本文編號(hào)：1784463