本文選題：近沸點(diǎn) + 寬沸點(diǎn)��； 參考：《青島科技大學(xué)》2017年碩士論文

【摘要】：本文分別以近沸點(diǎn)物系正丁醇-異丁醇及特殊寬沸點(diǎn)物系異丙醇-氯苯為例研究了塔頂蒸汽再壓縮型熱泵精餾工藝及分割式熱泵精餾工藝,采用以年度總費(fèi)用(TAC)最小為目標(biāo)函數(shù)的優(yōu)化方法,確定工藝的最優(yōu)操作參數(shù);通過對(duì)不同工藝動(dòng)態(tài)特性的分析確定了抗擾動(dòng)能力強(qiáng)的控制方案。對(duì)于近沸點(diǎn)二元物系正丁醇-異丁醇,考察了塔頂蒸汽再壓縮型熱泵精餾及變壓精餾熱集成工藝的動(dòng)態(tài)可控性。塔頂蒸汽再壓縮型熱泵精餾工藝,采用溫度控制,研究發(fā)現(xiàn)精餾塔存在兩個(gè)溫度斜率峰值,選擇不同溫度控制板對(duì)控制系統(tǒng)的動(dòng)態(tài)性能具有重要影響;變壓精餾熱集成工藝,采用雙組分控制,組成-回流比串級(jí)控制結(jié)構(gòu)可以實(shí)現(xiàn)穩(wěn)健控制。兩種分離工藝的最終動(dòng)態(tài)方案對(duì)比結(jié)果表明:塔頂蒸汽再壓縮型熱泵精餾工藝采用簡(jiǎn)單的控制結(jié)構(gòu)就可以取得較好的控制效果。對(duì)于特殊寬沸點(diǎn)二元物系異丙醇-氯苯,考察了上下塔的分離點(diǎn)濃度對(duì)分割式熱泵精餾穩(wěn)態(tài)工藝的經(jīng)濟(jì)性影響并首次提出了其工藝的動(dòng)態(tài)控制策略。傳統(tǒng)單塔精餾工藝、傳統(tǒng)熱泵精餾工藝以及分割式熱泵精餾工藝的經(jīng)濟(jì)性優(yōu)化結(jié)果表明:相較于傳統(tǒng)單塔精餾工藝及傳統(tǒng)熱泵精餾工藝,分割式熱泵精餾工藝的TAC分別減少34.06%、32.04%。對(duì)分割式熱泵精餾分離異丙醇-氯苯工藝提出了不同的動(dòng)態(tài)控制方案,結(jié)果表明改進(jìn)的QRe/F與Wm/F控制結(jié)構(gòu)對(duì)控制自由度減少的分割式熱泵精餾工藝具有優(yōu)勢(shì)。本文研究了熱泵精餾分離正丁醇-異丁醇、異丙醇-氯苯二元物系的方法及動(dòng)態(tài)控制策略,對(duì)類似近沸點(diǎn)及寬沸點(diǎn)體系的穩(wěn)態(tài)工藝優(yōu)化及動(dòng)態(tài)性能研究具有一定的參考價(jià)值。
[Abstract]:Taking n-butanol-isobutanol near boiling point system and isopropyl alcohol-chlorobenzene as examples, the distillation process of steam recompression heat pump and fractionated heat pump rectification process were studied in this paper. The optimal operation parameters of the process are determined by the optimization method with the minimum annual total cost as the objective function, and the control scheme with strong anti-disturbance ability is determined by analyzing the dynamic characteristics of different processes. For the near boiling point binary system of n-butanol-isobutanol, the dynamic controllability of the heat integration process of the top steam recompression heat pump and variable pressure distillation was investigated. By using temperature control, it is found that there are two temperature slope peaks in distillation tower. The selection of different temperature control plates has an important effect on the dynamic performance of the control system. Using two-component control, the structure of composition-reflux ratio cascade control can be used to realize robust control. The comparison of the final dynamic schemes of the two separation processes shows that the tower top steam recompression heat pump distillation process can obtain better control effect by adopting simple control structure. For a special wide boiling point binary system of isopropanol-chlorobenzene, the effect of separation point concentration of upper and lower column on the steady state process of fractionated heat pump distillation was investigated, and the dynamic control strategy of the process was proposed for the first time. The results of economic optimization of traditional single tower distillation process, traditional heat pump distillation process and split heat pump rectification process show that compared with traditional single column distillation process and traditional heat pump rectification process, the TAC of split heat pump distillation process is 34.06 and 32.04 less than that of traditional single column distillation process and traditional heat pump rectification process respectively. Different dynamic control schemes for separation of isopropanol and chlorobenzene by fractionated heat pump distillation are proposed. The results show that the improved QReR / F and Wm / F control structures have advantages in controlling the fractionated heat pump distillation process with reduced degrees of freedom. In this paper, the separation method and dynamic control strategy of binary system of n-butanol-isobutanol, isopropanol-chlorobenzene by heat pump distillation are studied, which has certain reference value for the steady state process optimization and dynamic performance study of similar systems with near boiling point and wide boiling point.
【學(xué)位授予單位】：青島科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TQ028.31

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