煙氣脫硝系統(tǒng)氨水匹配定投子系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn)
發(fā)布時(shí)間：2019-01-26 19:32
【摘要】：目前,從環(huán)境大數(shù)據(jù)來看,我國大氣污染形勢非常嚴(yán)峻,而且氮氧化物排放總量排在世界第一。大氣污染越來越受到相關(guān)部門重視,而且國家還確立了許多相關(guān)的排放標(biāo)準(zhǔn)。所以,在生產(chǎn)過程中,工業(yè)鍋爐進(jìn)行煙氣脫硝改造迫在眉睫。本課題是以某工業(yè)鍋爐煙氣脫硝改造項(xiàng)目為依托,其主要目的是開發(fā)一套能夠精確噴氨量,降低氮氧化物排放量,使其能夠符合國家排放規(guī)定的控制系統(tǒng)。論文首先介紹了與本課題相關(guān)的國內(nèi)外研究現(xiàn)狀和發(fā)展趨勢、課題研究背景與意義、并在此基礎(chǔ)上對課題的主要內(nèi)容進(jìn)行了深入研究。其次對工業(yè)鍋爐被控制量展開描述和詳細(xì)分析,包括整個(gè)SNCR脫硝技術(shù)的工藝流程組成,以及SNCR技術(shù)控制系統(tǒng)應(yīng)用原理。并在此基礎(chǔ)上,熟悉相關(guān)工藝要求和技術(shù)參數(shù)要求,按要求設(shè)計(jì)系統(tǒng)相關(guān)控制策略。完成以模糊PID調(diào)節(jié)作主調(diào)節(jié)器,氨水流量PI調(diào)節(jié)作副調(diào)節(jié)器,然后形成一個(gè)串級控制回路,以此為理論基礎(chǔ),搭建所需被控對象的控制模型,并在MATLAB/Simulink上對其控制策略進(jìn)行仿真研究和討論。然后根據(jù)實(shí)際工程需要完成相關(guān)的硬件設(shè)計(jì)和軟件設(shè)計(jì)工作。硬件設(shè)計(jì)包括系統(tǒng)各部分的設(shè)備選型,系統(tǒng)的硬件組態(tài)和網(wǎng)絡(luò)組態(tài)等;軟件設(shè)計(jì)包括SIMATIC PLC相關(guān)的編程軟件STEP7控制程序以及監(jiān)控軟件WinCC7.0監(jiān)控畫面的設(shè)計(jì)。實(shí)現(xiàn)煙氣脫硝氨水匹配定投系統(tǒng)的自動(dòng)監(jiān)測和控制,保證氮氧化物的排放量不高于設(shè)定值。最后對系統(tǒng)進(jìn)行初步調(diào)試,在此基礎(chǔ)上對系統(tǒng)控制運(yùn)行的穩(wěn)定性、被控參量的精確度以及執(zhí)行機(jī)構(gòu)的響應(yīng)速度進(jìn)行分析和研究,提出問題并得出相應(yīng)解決辦法。然后對課題所涉及研究的前景進(jìn)行總結(jié)與展望,以及后續(xù)研究所努力的方向。
[Abstract]:At present, from the point of view of environmental big data, the situation of air pollution in China is very serious, and the total amount of nitrogen oxide emissions ranks first in the world. More and more attention has been paid to air pollution, and many relevant emission standards have been established. Therefore, in the production process, industrial boiler flue gas denitrification is urgent. This project is based on the project of flue gas denitrification of a certain industrial boiler. The main purpose of this project is to develop a control system which can accurately inject ammonia and reduce the discharge of nitrogen oxides, so that it can meet the national emission regulations. Firstly, this paper introduces the current situation and development trend of the research at home and abroad, the background and significance of the research, and further studies the main contents of the subject. Secondly, the controlled amount of industrial boiler is described and analyzed in detail, including the composition of the whole SNCR denitrification process and the application principle of the SNCR technology control system. On this basis, familiar with the relevant process requirements and technical parameters, design the system control strategy according to the requirements. The fuzzy PID regulation is used as the main regulator, the ammonia flow rate PI regulation is used as the secondary regulator, and then a cascade control loop is formed. Based on this theory, the control model of the required controlled object is built. The control strategy is simulated and discussed on MATLAB/Simulink. Then according to the actual engineering needs to complete the hardware design and software design work. The hardware design includes the equipment selection of each part of the system, the hardware configuration and network configuration of the system, and the software design includes the design of the STEP7 control program related to SIMATIC PLC and the WinCC7.0 monitoring screen of the monitoring software. The automatic monitoring and control of flue gas denitrification ammonia matching system is realized, and the emission of nitrogen oxides is not higher than the set value. Finally, the system is preliminarily debugged. On this basis, the stability of the system control operation, the accuracy of the controlled parameters and the response speed of the actuator are analyzed and studied, and the problems are put forward and the corresponding solutions are obtained. Then the future of the research involved in the subject is summarized and prospected, as well as the direction of the follow-up research efforts.
【學(xué)位授予單位】：山東建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X701
[Abstract]:At present, from the point of view of environmental big data, the situation of air pollution in China is very serious, and the total amount of nitrogen oxide emissions ranks first in the world. More and more attention has been paid to air pollution, and many relevant emission standards have been established. Therefore, in the production process, industrial boiler flue gas denitrification is urgent. This project is based on the project of flue gas denitrification of a certain industrial boiler. The main purpose of this project is to develop a control system which can accurately inject ammonia and reduce the discharge of nitrogen oxides, so that it can meet the national emission regulations. Firstly, this paper introduces the current situation and development trend of the research at home and abroad, the background and significance of the research, and further studies the main contents of the subject. Secondly, the controlled amount of industrial boiler is described and analyzed in detail, including the composition of the whole SNCR denitrification process and the application principle of the SNCR technology control system. On this basis, familiar with the relevant process requirements and technical parameters, design the system control strategy according to the requirements. The fuzzy PID regulation is used as the main regulator, the ammonia flow rate PI regulation is used as the secondary regulator, and then a cascade control loop is formed. Based on this theory, the control model of the required controlled object is built. The control strategy is simulated and discussed on MATLAB/Simulink. Then according to the actual engineering needs to complete the hardware design and software design work. The hardware design includes the equipment selection of each part of the system, the hardware configuration and network configuration of the system, and the software design includes the design of the STEP7 control program related to SIMATIC PLC and the WinCC7.0 monitoring screen of the monitoring software. The automatic monitoring and control of flue gas denitrification ammonia matching system is realized, and the emission of nitrogen oxides is not higher than the set value. Finally, the system is preliminarily debugged. On this basis, the stability of the system control operation, the accuracy of the controlled parameters and the response speed of the actuator are analyzed and studied, and the problems are put forward and the corresponding solutions are obtained. Then the future of the research involved in the subject is summarized and prospected, as well as the direction of the follow-up research efforts.
【學(xué)位授予單位】：山東建筑大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：X701
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4 周W，
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