氧化铝蒸发系统的模拟.PDF

. 2008. 16( 8) Computer Measurement Control 1119 : 2008) : T F821 : A 毕庆华, 唐朝晖, 桂卫华, 叶 炜 ( , 410083) : , ; , , ; , , ; Newton- Raphson , , ; , : ; ; Simulation of Alumina Evaporation System i Qinghua, Tang Zhaohui, Gui Weihua, Ye Wei (College of Information Science and Engineering, Central South U niversity, Changsha 410083, China) Abstract: The fresh steam flow and the outlet concentration are important energy consumption index and outlet quality index in the alu mina evaporation process At present, the off- line method is universally adopted in manufacture so that the control of thefresh steam flow and the outlet concentration severely lags According to this, the mathematical model for four- effect alumina evaporator s is established Newton- Raphson method is used to solve the model of four- effect evaporation system and the practical system has been computed analogi cally T he error curve diagrams of the outlet concentration and thetotal evaporation have been plottedT he practical simulation indicates that the model is accurate and efficient and it has guidance significance in saving energy and controlling depletion Key words: four- effect evaporation sy stem; mathematical model; simulated calculation 0 , , 40 % ~ 50 %[ 1] , , , , , [2- 3] [4] , , 1 , [5- 6] , 1 , , , , 1 I , , ; , , IV , ; , , :