【摘要】：傳統(tǒng)的硅酸鈉窯爐的溫度控制,大多采用的是手動控制,窯爐溫度波動較大,控制效果不佳,嚴(yán)重影響了硅酸鈉產(chǎn)品的質(zhì)量。本文結(jié)合某企業(yè)的硅酸鈉生產(chǎn)線的實際項目,從目前國內(nèi)外對窯爐溫度控制的研究現(xiàn)狀出發(fā),設(shè)計了一套可行的硅酸鈉窯爐溫度計算機控制系統(tǒng),該系統(tǒng)以WinCC組態(tài)軟件為上位機,以S7-200 PLC為下位機,實現(xiàn)了對硅酸鈉窯爐溫度的智能優(yōu)化控制,旨在提高生產(chǎn)效率、控制精度和穩(wěn)定性,實現(xiàn)生產(chǎn)的智能化以及節(jié)能環(huán)保。硅酸鈉窯爐溫度的測量方式,一般采用的都是利用輻射感溫計,測量溶化室火焰的溫度,存在著靈敏度不高,測量不夠準(zhǔn)確的缺陷。針對這一現(xiàn)象,本文提出了一種基于紅外輻射的測溫方式,用紅外輻射高溫計代替?zhèn)鹘y(tǒng)的輻射感溫計,提高了測量的精度和靈敏度,從而,提高了產(chǎn)品的質(zhì)量。硅酸鈉窯爐溫度控制系統(tǒng)一個大滯后,擾動因素多且強的復(fù)雜系統(tǒng)。常規(guī)的PID控制已經(jīng)很難滿足控制要求。本文深入地研究了預(yù)測控制算法,提出了DMC-PID串級調(diào)節(jié)控制方法,減小了擾動,提高了控制系統(tǒng)的跟蹤性、魯棒性和穩(wěn)定性。并增加了含氧量控制系統(tǒng),不僅實現(xiàn)了窯爐溫度的智能調(diào)節(jié),而且提高了煤氣的利用率,達到了節(jié)能減排的目的。最后,完成現(xiàn)場安裝調(diào)試并按期投入生產(chǎn),在投產(chǎn)過程中,整個窯爐溫度控制系統(tǒng)穩(wěn)定高效、安全正常地運行,提高了生產(chǎn)率和產(chǎn)品質(zhì)量,促進了企業(yè)的發(fā)展。
[Abstract]:The traditional temperature control of sodium silicate kiln mostly adopts manual control. The furnace temperature fluctuates greatly and the control effect is not good, which seriously affects the quality of sodium silicate products. Combined with the actual project of sodium silicate production line in a certain enterprise, this paper designs a feasible computer control system of sodium silicate furnace temperature from the present research situation of furnace temperature control both at home and abroad. The system uses WinCC configuration software as upper computer and S7 / 200 PLC as lower computer to realize intelligent optimization control of sodium silicate furnace temperature. The aim is to improve production efficiency, control precision and stability, realize intelligent production and energy saving and environmental protection. The method of measuring the temperature of sodium silicate kiln is usually using radiation thermoscope to measure the temperature of flame in dissolving chamber, which has some defects such as low sensitivity and inaccuracy. In view of this phenomenon, this paper presents a temperature measurement method based on infrared radiation. Using infrared radiation pyrometer instead of traditional radiation thermoscope improves the precision and sensitivity of the measurement, and thus improves the quality of the product. The temperature control system of sodium silicate kiln is a complex system with large lag and many disturbance factors. Conventional PID control has been difficult to meet the control requirements. In this paper, the predictive control algorithm is studied deeply, and the DMC-PID cascade control method is proposed, which reduces the disturbance and improves the tracking, robustness and stability of the control system. The oxygen content control system is added, which not only realizes the intelligent adjustment of kiln temperature, but also improves the utilization rate of gas, and achieves the purpose of saving energy and reducing emissions. Finally, the site installation and commissioning are completed and put into production according to schedule. In the process of commissioning, the whole furnace temperature control system runs stably, efficiently, safely and normally, which improves the productivity and product quality, and promotes the development of the enterprise.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ177.4;TP273

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