基于PLC的燃油鍋爐控制系統設計

電氣自動化論文編號:ZD888    論文字數:9591,頁數:43

 
目錄
摘要 II
ABSTRACT III
1  緒論 3
1.1  背景與意義 3
1.2  設計內容 3
2  燃油鍋爐總體結構 5
2.1 燃油鍋爐控制要求 5
2.2 燃油鍋爐的運行框圖 5
2.3 燃油鍋爐總體結構 6
3  硬件電路設計 8
3.1  主電路的設計 8
3.2  輔助電路的設計 9
3.2.1 PLC型號的選擇 9
3.2.2 系統I/O通道分配及PLC的I/O接線圖 10
4  軟件系統設計 14
4.1  軟件設計一般原則 14
4.2  軟件設計要求 15
4.3  軟件系統設計 15
4.3.1 起動 15
4.3.2 停止 19
4.3.3 異常狀況自動關火 21
4.3.4 鍋爐水位控制 24
4.3.5 系統總梯形圖 25
5  總結 31
致謝 32
參考文獻 33
附錄  指令表 35

摘要

 燃油鍋爐隨著城市發展而越來越多地應用。以前使用燃煤鍋爐由于其在燃燒時產生大量的二氧化碳和粉塵污染環境而逐漸被淘汰，相對應的用燃油鍋爐來代替燃煤鍋爐已被廣泛用于賓館、大型商場等建筑。鍋爐是一次性能源煤炭石油天然氣轉換成二次能源蒸汽量的重要動力設備。據有關資料統計，目前我國有各類工業鍋爐約25萬多臺。每年耗煤量占全國產量的1/3，同時還消耗大量的石油和天然氣。
 由PLC控制的燃油鍋爐控制系統適用于配用各種進口及國產燃燒器的燃油鍋爐，對鍋爐實行全自動控制，包括鍋爐水位、蒸汽壓力、燃燒系統的參數檢測、指示、報警、調節等進行控制。本設計首先確定燃油鍋爐的控制對象，以控制控制對象為依據設計燃油鍋爐的總體結構和運行方式，接著進行設計硬件系統和軟件系統，硬件系統中分別對主電路和輔助電路進行設計，在軟件設計中先對各模塊進行設計和調試，即啟動、停止、異常狀況自動關火和水位控制。
 
 
關鍵詞: 可編程序控制器； 燃油鍋爐；控制系統

ABSTRACT
Fuel boilers with urban development, more and more widely. Due to its previous use coal boiler burning in the amount of carbon dioxide emissions and dust pollution of the environment and be washed out gradually, and the corresponding with fuel boilers instead of coal-fired boilers has been widely used in hotels, shopping, etc. Boiler is one-time energy coal oil and gas quantity of steam secondary energy converts the important power equipment. According to the statistics, China has all kinds of industrial boiler about 25 million sets. The yield of coal consumption year 1/3, also consume large amounts of oil and gas.
By PLC control oil boiler control system is applicable to various kinds of imported and domestic fuel burner for boiler. implement automatic control, including the boiler water and steam pressure, the parameters of the system test, instructions, alarm, adjusting control, etc. The design of the first identify the fuel boilers control object and control based on object control design of the overall structure and oil burning boiler operation, and design of hardware and software systems in the system, the hardware circuit of design, and the auxiliary circuit in the software design of each module in the design and debug, namely the start and stop, abnormal condition of automatic fire and water level control.

Keywords：  PLC、 Fuel boilers、 The control system