羅克韋爾PLC在化學水處理系統中的應用設計

論文編號:ZD1282  論文字數:14785,頁數:48

摘  要

 可編程序控制器是一種專門為在工業環境下應用而設計的數字運算操作的電子裝置，對提高設備的運轉率起到了重要作用。隨著時間的推移，PLC已經不再局限于最初世紀的邏輯和順序控制領域，越來越多的PLC產品向著滿足更多更復雜的控制要求邁進。隨著現場總線和工業以太網技術出現和推廣，可編程序控制器的應用日益普及，PLC在電廠鍋爐控制系統中的應用也比較廣泛，如PLC在化學水處理系統中的應用；PLC在鍋爐定期排污系統中的應用； PLC在汽輪機凝汽器膠球清洗系統的應用；PLC在給水泵起、停控制中的應用；PLC在爐膛安全保護監控系統中的應用。隨著PLC的生產和發展及其顯而易見的優點，電廠化學水處理系統成了電廠中應用PLC進行程序控制最早、最廣泛的輔助系統。電廠化學水處理包括鍋爐補給水處理、凝結水處理和廢水處理，其目的在于預防熱力設備結垢、腐蝕和結鹽，確保可靠生產，并盡量做到節水和控制環境污染。考慮到鍋爐補給水處理和凝結水處理的工藝流程大致相似，本課題就主要針對PLC在鍋爐補給水系統中的應用設計。以實現對化學水處理的自動化控制，降低生產成本提高生產效率。
 
 
 關鍵詞  電廠水處理，鍋爐補給水處理，凝結水處理，controllogixPLC

 ABSTRACT

 The programmable controller is designs the manufacture for the industrial control application the special purpose computer control device, to raised equipment's service factor to play the influential role. With the lapse of time, PLC already no longer limited to initial century logic and the sequential control domain, more and more PLC products turn toward satisfy the more complex control requests to make great strides forward. Appears along with the field bus and the industry ethernet technology and promotes, more powerful promotion PLC product in industrial field widespread use. PLC is also quite widespread in the power plant boiler control system's application, like PLC in boiler regular pollution discharge system's application; PLC in chemistry water disposal system's application; PLC in steam turbine water recovery condenser rubber ball clean system's application; PLC in the feed pump gets up, stops in the control the application; PLC in chamber safekeeping of security supervisory system's application. Along with the PLC production and the development and the obvious merit, the power plant chemistry water disposal system became in the power plant to carry on the programmed control using PLC most early, the most widespread servosystem. The power plant chemistry water treatment including the boiler supplies water treatment, the congealment water treatment and the wastewater disposal, its goal lies in the prevention thermal energy equipment scaling, the corrosion and ties the salt, guarantees the reliable production, and achieves saving water and the control environmental pollution as far as possible. Considered the boiler supplies water treatment and the congealment water treatment's technical process is approximately similar, this topic mainly aims at PLC in the boiler supplies aqueous system's application design. Realizes to chemistry water treatment automated control, cuts the production cost enhancement production efficiency.
 
 
 Key words  water treatment of electric power plant,  boiler supply water and condensed water treatment , controllogixPLC

目   錄

摘  要 I
ABSTRACT II

1  緒論 1
1.1序言 1
1.2 PLC的國內外狀況及未來展望 1
1.2.1 PLC的國內外狀況 1
1.2.2 PLC的未來展望 2
1.3 化學水處理工藝流程簡介 3
1.4 羅克韋爾PLC概述及其特點 4
1.4.1 羅克韋爾PLC概述 4
1.4.2 羅克韋爾PLC的特點 4
1.5 電廠化學水里的發展趨勢 5
2  工藝控制 7
2.1 PLC在鍋爐補給水系統中的應用 7
2.1.1 工藝流程 7
2.1.2 控制要求 10
2.1.3 程序設計 11
3  PLC硬件設計 12
3.1 PLC機型的選擇 12
3.2 PLC機架的選擇 13
3.3 PLC的CPU選擇 13
3.4 電源模塊的選擇 14
3.5 I/O模塊的選擇 15
4  PLC軟件設計 17
4.1 編程軟件選擇 17
4.1.1 選擇編程軟件 17
4.1.2 rslogix5000編程軟件硬件配置 17
4.2 CONTROLLOGIX PLC系統編程軟件 17
4.2.1 rslogix5000編程軟件功能簡述 17
4.2.2 rslogix5000軟件的安裝步驟及操作界面介紹 18
4.2.3題目設計用的主要指令介紹 19
4.3 程序框圖的設計 20
4.4 編寫程序（見附錄A） 26
結 論 27
參 考 文 獻 28
附錄A：鍋爐補給水處理系統的設計程序 29
附錄B: 鍋爐補給水處理系統的I/O地址分配表 42
致 謝 44