(1. 中南大學(xué) 信息科學(xué)與工程學(xué)院，長(zhǎng)沙 410083；
2. 武漢理工大學(xué) 自動(dòng)化學(xué)院，武漢 430070)
摘 要: 研究連續(xù)碳酸化分解過(guò)程輸入輸出運(yùn)行規(guī)律，對(duì)其過(guò)程進(jìn)行動(dòng)態(tài)數(shù)學(xué)描述是實(shí)現(xiàn)氧化鋁連續(xù)碳酸化分解生產(chǎn)過(guò)程優(yōu)化控制的關(guān)鍵。針對(duì)實(shí)際連續(xù)碳酸化分解過(guò)程的工藝特點(diǎn)，將系統(tǒng)設(shè)計(jì)為ICSTR關(guān)聯(lián)連續(xù)攪拌槽式反應(yīng)釜模式。基于碳酸化分解過(guò)程物理化學(xué)機(jī)理，應(yīng)用質(zhì)量守恒定律，描述反應(yīng)器中反應(yīng)物成分濃度和脫硅精液流量和二氧化碳輸入量之間的動(dòng)態(tài)變化，建立了連續(xù)碳酸化分解過(guò)程系統(tǒng)非線性多重時(shí)滯的動(dòng)態(tài)數(shù)學(xué)模型。通過(guò)數(shù)值計(jì)算及仿真，列出碳酸化分解過(guò)程實(shí)際測(cè)量值進(jìn)行比較的結(jié)果，給出連續(xù)碳酸化分解各槽Al2O3濃度連續(xù)變化仿真曲線，驗(yàn)證模型能較好地體現(xiàn)系統(tǒng)即時(shí)變化過(guò)程，并討論非線性模型解的相關(guān)問(wèn)題。
關(guān)鍵字: 氧化鋁；碳酸化分解；ICSTR；過(guò)程建模；非線性；多重時(shí)滯
（1. School of Information Science and Engineering, Central South University, Changsha 410083, China;
2. School of Automation, Wuhan University of Technology, Wuhan 430070, China）
Abstract:A continuous system with the mode of interactive continuous stirred-tank reactor (ICSTS) was proposed according to the processing characteristics of alumina carbonated decomposition. The nonlinear and multiple-time-delay dynamic mathematical model of carbonated decomposition was built up based on the physical and chemical mechanism of carbonated decomposition and mass conservation law. The dynamical relationship among the reactant component concentration in the reactor and the inputs of predesilicate green liquor and carbon dioxide was analyzed. Comparison between the calculated results and simulated ones shows that this model reflects the real process of carbonated decomposition. The simulating curves of the change of Al2O3 concentration are given. Lastly the solutions of nonlinear equation were discussed.
Key words: alumina; carbonation decomposition; ICSTR; process modeling; nonlinear; multi-time delay
