本文關(guān)鍵詞：沼氣脫硫過程控制系統(tǒng)的設(shè)計與實現(xiàn)　出處：《濟(jì)南大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 沼氣脫硫 PLC 組態(tài)監(jiān)控 PID控制

【摘要】：沼氣作為可再生清潔能源,在污染問題日益凸顯的情況下逐步被社會重視。由于沼氣中通常含有硫化氫,燃燒之后易生成二氧化硫等有害物質(zhì),因此在使用沼氣之前必須將其中的硫化氫除去。因為硫化氫具有強(qiáng)烈的毒性,對人體能造成傷害,所以應(yīng)實現(xiàn)脫硫系統(tǒng)自動化,減少人工操作步驟。本論文課題來源于某自動化工程公司的沼氣項目,設(shè)計研發(fā)一套沼氣脫硫自動控制系統(tǒng),實現(xiàn)脫硫自動控制、運行狀態(tài)顯示、風(fēng)機(jī)變頻調(diào)速、故障監(jiān)控報警等功能,在提高自動化水平的前提下,保證脫硫效率,確保脫硫系統(tǒng)能夠安全穩(wěn)定運行。首先,了解了沼氣脫硫的意義,根據(jù)沼氣脫硫工藝流程,分析工藝操作過程,給出一個脫硫控制系統(tǒng)的設(shè)計方案。介紹了沼氣脫硫控制系統(tǒng)的相關(guān)設(shè)備,包括觸摸屏、模擬量輸入輸出模塊、變頻器等。其次,對脫硫控制系統(tǒng)進(jìn)行了軟件設(shè)計,完成了S7-200PLC的控制系統(tǒng)梯形圖設(shè)計。受組分濃度大小不同的影響,風(fēng)機(jī)開度也需要隨之進(jìn)行調(diào)整,從而保證輸送的空氣能夠充分反應(yīng)掉,提高脫硫液的再生效率。本系統(tǒng)依據(jù)實時檢測到的組分濃度,利用PID控制器計算出相應(yīng)的空氣進(jìn)量,并通過變頻器對風(fēng)機(jī)進(jìn)行調(diào)整。在設(shè)計脫硫液補(bǔ)液、排液以及循環(huán)泵啟停的時候,不同的操作須對應(yīng)不同的啟停時間。然后,設(shè)計觸摸屏監(jiān)控界面,利用MCGS組態(tài)軟件完成脫硫控制系統(tǒng)監(jiān)控界面設(shè)計,在組態(tài)環(huán)境下,建立新工程,構(gòu)造實時數(shù)據(jù)庫、主控窗口和設(shè)備窗口等,實現(xiàn)對系統(tǒng)運行的實時在線監(jiān)控,對出現(xiàn)的狀況進(jìn)行及時報警。最后,在現(xiàn)場對系統(tǒng)硬件進(jìn)行組裝,著重檢查了可能出現(xiàn)的問題,對控制系統(tǒng)進(jìn)行調(diào)試。調(diào)試證明,系統(tǒng)能夠穩(wěn)定運行,實現(xiàn)高效脫硫。
[Abstract]:Biogas, as a renewable and clean energy, has been paid more and more attention by the society under the condition of increasingly serious pollution problem. Because biogas usually contains hydrogen sulfide, it is easy to produce sulfur dioxide and other harmful substances after combustion. Therefore, hydrogen sulfide must be removed before the use of biogas. Since hydrogen sulfide is highly toxic and harmful to human beings, the desulfurization system should be automated. This paper comes from the biogas project of a certain automation engineering company, designs and develops a set of automatic control system of biogas desulphurization, realizes the automatic control of desulfurization, and shows the running state. Fan frequency control, fault monitoring and alarm functions, in the premise of improving the level of automation, to ensure the efficiency of desulphurization, to ensure the safe and stable operation of the desulfurization system. First, understand the significance of biogas desulphurization. According to the process flow of biogas desulphurization, the operation process is analyzed, and a design scheme of desulfurization control system is given. The related equipments of the control system are introduced, including touch screen, analog input and output module. Secondly, the software design of desulphurization control system is carried out, and the ladder diagram of S7-200 PLC control system is designed, which is affected by the different concentration of components. Fan opening also needs to be adjusted to ensure that the air can be fully reacted to improve the efficiency of desulfurization fluid regeneration. This system based on the real-time detection of component concentration. The PID controller is used to calculate the corresponding air intake, and the fan is adjusted by frequency converter. During the design of desulphurization fluid rehydration, drainage and circulation pump start and stop. Different operation should correspond to different starting and stopping time. Then, the touch screen monitoring interface is designed, and the monitoring interface of desulphurization control system is designed by using MCGS configuration software. In the configuration environment, a new project is established. The real-time database, main control window and equipment window are constructed to realize real-time on-line monitoring of the system operation and timely alarm. Finally, the hardware of the system is assembled in the field. The possible problems are examined emphatically and the control system is debugged. The debugging proves that the system can run stably and realize high efficiency desulphurization.
【學(xué)位授予單位】：濟(jì)南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：X701.3;TP273

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王鋼;王欣;劉偉;高德玉;赫大新;陳薇;;沼氣脫硫技術(shù)研究[J];化學(xué)工程師;2008年01期

2 ;濮陽龍豐紙業(yè)沼氣脫硫工程投入運行[J];造紙信息;2010年05期

3 ;龍豐紙業(yè)沼氣脫硫工程投入運行[J];中華紙業(yè);2010年09期

4 路敦濤;楊艷紅;張振忠;;沼氣脫硫系統(tǒng)存在的問題及解決措施[J];化工設(shè)計通訊;2011年04期

5 金堯;;介紹一種新型沼氣脫硫裝置[J];中國沼氣;1989年02期

6 韋文虎;張金林;查忠秀;;沼氣脫硫[J];能源研究與利用;1991年02期

7 張榕林;賈平麗;;沼氣脫硫運行中幾個問題的探討[J];中國沼氣;1993年02期

8 胡明成,龍騰瑞,李學(xué)軍;沼氣脫硫技術(shù)研究新進(jìn)展[J];中國沼氣;2005年01期

9 路敦濤;張振忠;;沼氣脫硫系統(tǒng)存在的問題及解決措施[J];化工設(shè)計;2011年05期

10 李曉紅;;沼氣脫硫技術(shù)的探討[J];煤氣與熱力;2010年06期

相關(guān)碩士學(xué)位論文 前3條

1 朱大偉;沼氣脫硫過程控制系統(tǒng)的設(shè)計與實現(xiàn)[D];濟(jì)南大學(xué);2015年

2 魏本平;廢水脫氮與沼氣脫硫耦聯(lián)反應(yīng)動力學(xué)研究[D];中國農(nóng)業(yè)科學(xué)院;2013年

3 黃丞;沼氣脫硫脫碳系統(tǒng)設(shè)計及工藝研究[D];東北農(nóng)業(yè)大學(xué);2014年

，

本文編號：1371743