【正文】 Of The Introduction錯誤 !未定義書簽。 The Significance Of This Design.......................... 錯誤 !未定義書簽。 ABSTRACT.............................................................................. 錯誤 !未定義書簽。同時采用了 SBR，間歇性活性污泥法進行污水處理。污水處理是一個復雜且多變量的控制過程，傳統(tǒng)的污水處理工藝，主要以手動控制為主，根據(jù)操作人員的經(jīng)驗來進行控制。而水污染作為現(xiàn)今世界重要的環(huán)境污染之一，污水處理工藝顯得更加重要。集中控制，分散管理，很大的提 升了控制過程中的安全性和穩(wěn)定性。s world, more important is the sewage treatment process. Sewage treatment is to control the process of a plex and variable, the traditional wastewater treatment technology, mainly by the manual control, according to the experience of the operator to control. This design is used in distributed control system to control the sewage treatment. It realized the online management, operation and display the concentration, and the dispersion function, load and dangerous. Centralized control, decentralized management, greatly improved the control process in the safety and stability. At the same time adopted the SBR, intermittent activated sludge wastewater treatment. And according to the method of SBR sewage treatment process for the selection of the sensor and the automatic control program written for process flow diagram of each sewage treatment section and the corresponding PLC. Key words: Sewage treatment process The SBR method PLC III 目 錄 摘 要 ......................................................................................................................... I ABSTRACT ............................................................................................................... II 第 1 章 緒論 .............................................................................................................. 1 本設(shè)計的研究背景與意義 ........................................................................... 1 本設(shè)計的研究背景 ............................................................................... 1 本設(shè)計研究的意義 ............................................................................... 1 國內(nèi)外污水處理控制現(xiàn)狀 .......................................................................... 2 第 2 章 污水處理系統(tǒng)的工藝及主要構(gòu)筑物 ......................................................... 5 污水處理工藝 ............................................................................................... 5 間歇式活性污泥法（ SBR）介紹 ......................................................... 6 SBR 工藝的基本原理 ............................................................................ 7 SBR 工藝的技術(shù)特征 ............................................................................ 8 溶解氧在 SBR 法中的作用 ................................................................. 9 污水處理系統(tǒng)的主要構(gòu)筑物 ...................................................................... 9 污水一級處理（污水預(yù)處理） ......................................................... 10 污水二級處理（生物處理） ..............................................................11 污泥處理 .............................................................................................. 12 污水處理自控過程和監(jiān)控系統(tǒng)的作用 ..................................................... 13 污水處理自動控制過程 ..................................................................... 13 監(jiān)控系統(tǒng)的作用 ................................................................................. 14 第 3 章 硬件部分設(shè)計 ............................................................................................ 17 PLC 工作原理及特點 ................................................................................. 17 西門子 PLC ................................................................................................ 18 PLC 內(nèi)部各模塊選型 .......................................................................... 20 IV PLC I/O 分配 ........................................................................................ 21 部分電路設(shè)計 ............................................................................................. 23 主回路硬件設(shè)計 ................................................................................. 23 S7300 數(shù)字量輸入模塊原理圖 ......................................................... 25 S7300 數(shù)字量輸出模塊原理圖 ......................................................... 28 S7300 模擬量輸入模塊原理圖 ......................................................... 30 手 /自動控制電路接線方式 ............................................................... 31 傳感器的選擇 ............................................................................................. 33 液位傳感器的選擇 ............................................................................. 34 PH 傳感器的選擇 ................................................................................ 37 DO 儀的選擇 ........................................................................................ 37 第 4 章 PLC 的程序設(shè)計 ....................................................................................... 39 PLC 控制系統(tǒng)設(shè)計的基本步驟 ................................................................. 39 PLC 程序自動控制部分程序設(shè)計 ............................................................ 40 預(yù)處理區(qū) PLC 控制程序 .................................................................... 40 曝氣沉淀池 PLC 控制程序 ................................................................ 44 污泥處理池 PLC 控制程序 ................................................................ 46 結(jié) 論 ......................................................................................................................... 48 致 謝 ...................................................................................................................... 49 參考文獻 .................................................................................................................. 50 附 錄 ......................................................................................................................... 52 V CONNECTS ABSTRACT.............................................................................. 錯誤 !未定義書簽。 The Research Background Of This