【正文】 摘要 隨著社會(huì)經(jīng)濟(jì)的飛速發(fā)展，城市建設(shè)規(guī)模的不斷擴(kuò)大，以及人們生活水平的不斷提高，對(duì)城市生活供暖的用戶數(shù)量和供暖質(zhì)量提出了越來越高的要求，因此對(duì)于供暖鍋爐系統(tǒng)也有了更高層次的要求，利用現(xiàn)代自動(dòng)控制技術(shù)，通過變頻器和可編程控制器 PLC 的運(yùn)用，實(shí)現(xiàn)操作簡單、自動(dòng)化程度高、環(huán)境污染少、低能耗、供暖質(zhì)量高和日常維護(hù)費(fèi)用低的供暖變頻鍋爐系統(tǒng)。本設(shè)計(jì)利用現(xiàn)代變頻技術(shù)和 PLC 控制技術(shù)設(shè)計(jì)出了一套供暖鍋爐變頻控制系統(tǒng)。系統(tǒng)中共有 6 臺(tái)鍋爐，每臺(tái)鍋爐各分配 1 臺(tái)爐排、1 臺(tái)鼓風(fēng)機(jī)、 1 臺(tái)引風(fēng)機(jī)，將 6 臺(tái)鍋爐分為兩組，其中 4 臺(tái)用于工礦企 業(yè)供暖任務(wù)， 2臺(tái)用于居民日常供暖任務(wù)，每臺(tái)爐排電機(jī)、引風(fēng)機(jī)、鼓風(fēng)機(jī)各配置 1 臺(tái)變頻器，每組鍋爐系統(tǒng)各分配 2 臺(tái)補(bǔ)水泵 。 4 臺(tái)鍋爐系統(tǒng)分配 4 臺(tái)循環(huán)泵， 2 臺(tái)鍋爐系統(tǒng)分配 2 臺(tái)循環(huán)泵，兩個(gè)循環(huán)泵系統(tǒng)均配置 2 臺(tái)變頻器 ， 循環(huán)泵變頻控制采用“一拖四”和“一拖二”控制方式 。 關(guān)鍵詞 ： 鍋爐 PLC 變頻器 電機(jī) Abstract With the rapid development of social economy, city construction scale continues to expand, and people39。s rising living standards, puts forward more and more high request to the city life heating user quantity and the heating quality, so the heating boiler system is also required higher level, the use of modern automatic control technology, the frequency converter and application of programmable logic controller PLC, realization of simple operation, high degree of automation, less environmental pollution, low energy consumption, high quality and daily maintenance of heating heating boiler system cost low frequency. The design of the use of modern variable frequency technology and PLC control technology to design a set of heating boiler control system. System there are 6 boilers, each boiler grate, the distribution of 1 sets of 1 blowers, 1 fans, 6 boilers are divided into two groups, of which 4 units used in industrial and mining enterprises heating task, 2 for household heating tasks, each grate motor, fan, blower for each configuration 1 inverters, the distribution of each boiler system 2 sets of water pumps. Boiler system 4 sets of distribution of 4 circulating pumps, boiler system 2 sets of distribution of 2 circulating pumps, two circulating pump system configuration 2 converters, circulation pump frequency control by four and two control mode. Keywords: Boiler PLC sensor moto 目錄 1. 緒論 ................................................. 1 鍋爐系統(tǒng)研究背景 ................................................................................................ 1 國內(nèi)鍋爐系統(tǒng)現(xiàn)狀 ................................................................................................ 1 鍋爐系統(tǒng)研究意義 ................................................................................................ 2 2. 總體方案設(shè)計(jì) ......................................... 3 3. 系統(tǒng)硬件設(shè)計(jì) ......................................... 5 循環(huán)泵系統(tǒng) ............................................................................................................ 5 補(bǔ)水泵系統(tǒng) ............................................................................................................ 5 爐排、鼓風(fēng)和引風(fēng)系統(tǒng) ........................................................................................ 6 本章 小結(jié) ................................................................................................................ 6 4. 系統(tǒng)軟件設(shè)計(jì) ......................................... 7 PLC 選型及模塊選擇 ........................................................................................... 7 PLC 的 I/O 地址分配 ............................................................................................ 7 PLC 接線原理圖 ................................................................................................... 8 PLC 控制系統(tǒng)框圖 ............................................................................................... 8 系統(tǒng)程序總流程圖 ................................................................................................ 8 系統(tǒng)各個(gè)子程序設(shè)計(jì) ............................................................................................ 8 系統(tǒng)整體的啟動(dòng) /停止子程序 .................................................................... 8 鼓風(fēng)機(jī)、爐排、引風(fēng)機(jī)控制子程序 .......................................................... 9 循環(huán)泵控制子程序 .................................................................................... 10 補(bǔ)水泵控制子程序 .................................................................................... 12 模擬量輸入子程序 .................................................................................... 12 通信處理子程序 ........................................................................................ 13 PLC 梯形圖設(shè)計(jì) ................................................................................................. 14 本章小結(jié) .............................................................................................................. 14 5. 變頻器的選擇 ........................................ 15 變頻器頻率范圍的設(shè)定 ...................................................................................... 15 變頻器及其型號(hào) .................................................................................................. 15 本章小結(jié) .............................................................................................................. 16 6. 傳感器的選擇 ........................................ 17 溫度傳感器的選型 .............................................................................................. 17