【正文】 基于 PLC 控制的城市污水處理系統(tǒng)設(shè)計(jì) 目 錄 摘要 ............................................................................................................................................ 1 關(guān)鍵詞 ........................................................................................................................................ 1 Abstract ..................................................................................................................................... 2 Key Words ................................................................................................................................. 2 引言 ............................................................................................................................................ 3 1 設(shè)計(jì)污水處理系統(tǒng)的緣由 .................................................................................................... 3 設(shè)計(jì)的目的和意義 .............................................................................................................. 3 課題的背景 .......................................................................................................................... 3 污水處理的國(guó)內(nèi)外現(xiàn)狀 ...................................................................................................... 3 課題主要設(shè)計(jì)的內(nèi)容 .......................................................................................................... 4 2 城市污水處理控制系統(tǒng)總體介紹 ........................................................................................ 4 污水處理概述 ...................................................................................................................... 4 常用的工業(yè)污水處理工藝 .................................................................................................. 4 工業(yè)污水處理系統(tǒng)控制形式 .............................................................................................. 6 工業(yè)污水處理系統(tǒng)的功能要求 .......................................................................................... 7 信號(hào)輸入 ........................................................................................................................... 7 控制輸出信號(hào) ................................................................................................................... 8 3 設(shè)計(jì)方案的確定 .................................................................................................................... 8 PLC 控制系統(tǒng)的設(shè)計(jì)分析 .................................................................................................. 8 PLC 的結(jié)構(gòu) ....................................................................................................................... 8 PLC 的工作原理 ............................................................................................................... 9 PLC 控制系統(tǒng)設(shè)計(jì)原則的設(shè)計(jì)步驟 ............................................................................... 9 污水處理 PLC 控制系統(tǒng)的設(shè)計(jì)分析 .............................................................................. 11 污水處理的過(guò)程 ............................................................................................................ 11 上位監(jiān)控管理機(jī) ............................................................................................................ 11 4 硬件部分的設(shè)計(jì) .................................................................................................................. 11 PLC 的選擇 ........................................................................................................................ 11 SBR 污水處理系統(tǒng)設(shè)備 ................................................................................................. 12 污水處理控制流程 ............................................................................................................ 13 5 軟件部分的設(shè)計(jì) .................................................................................................................. 14 程序的流程圖 .................................................................................................................... 14 梯形圖程序 ........................................................................................................................ 15 污水處理系統(tǒng)各主要工作指令分析和設(shè)計(jì) .............................................................. 15 根據(jù)控制要求、 I/O 分配表，設(shè)計(jì) PLC 梯形圖 ....................................................... 17 調(diào)試過(guò)程 ...................................................................................................................... 17 總結(jié) .......................................................................................................................................... 17 參 考 文 獻(xiàn) ............................................................................................................................ 18 附錄 A 污水處理系統(tǒng)梯形圖程序 ...................................................................................... 19 致 謝 ...................................................................................................................................... 24 基于 PLC 控制的城市污水處理系統(tǒng)的設(shè)計(jì) 1 基于 PLC 控制的城市污水處理系統(tǒng)設(shè)計(jì) 摘要 : 最近幾年 ,城市污水處理廠已經(jīng)變成最重要的基礎(chǔ)設(shè)施之一，特別是小城市和中等城市 ,新增和繼續(xù)拓展污水處理廠已經(jīng)成為各個(gè)地方政府提高人民生活質(zhì)量的最關(guān)心的事。隨著現(xiàn)在自動(dòng)控制技術(shù)和微機(jī)技術(shù)的不斷發(fā)展、提高 ,污水處理廠的自動(dòng)控制水平也隨之提高，而 PLC 控制器以其技術(shù)成熟、通用性好、可靠性高、安裝靈活、擴(kuò)展方便、性能價(jià)格比高等一系列優(yōu)點(diǎn) ，在工業(yè)控制中得到了越來(lái)越廣泛的應(yīng)用。本文 主要介紹了污水處理廠自動(dòng)控制系統(tǒng)的組成、功能及如何利用 PLC 實(shí)現(xiàn)自動(dòng)控制 ,并介紹了在系統(tǒng)實(shí)施中遇到的若干問(wèn)題及其解決措施。 在污水處理中采用 PLC 控制系統(tǒng)改造后，提高了自動(dòng)控制的可靠性 ,不僅減輕了工人的勞動(dòng)強(qiáng)度 ,而且提高了污水處理廠的運(yùn)行效率和運(yùn)行效益 ,實(shí)現(xiàn)了污水廠生產(chǎn)管理 的科學(xué)性。 關(guān)鍵詞 ： 污水處理， PLC，工藝流程 XXX 本科畢業(yè)設(shè)計(jì)（論文） 2 PLC based control of the city sewage treatment system design Abstract: In recent years, the city sewage treatment plant has bee one of the most important infrastructure. Especially small and medium city, new or expanded sewage treatment plant has bee a local government to improve the lives of the people level priority. Along with the automation technology, puter technology continues to develop, improve, sewage treatment plant automation level also improved. While the PLC controller with its technology is mature, good monality, hig