【正文】 .............. 7 3 供水方案的選擇及管網(wǎng)計算 .................................................................................... 8 工程要求 .................................................................................................... 8 選擇水源及凈水廠位置 ............................................................................... 8 選擇供水系統(tǒng)方案 ...................................................................................... 8 管網(wǎng)定線 .................................................................................................... 8 2021年給水排水工程畢業(yè)設(shè)計 給水系統(tǒng)管網(wǎng)布置要求 ..................................................................... 8 輸水管區(qū)定線要求 ............................................................................ 9 配水管網(wǎng)布置 ................................................................................... 9 配水管與構(gòu)筑物或管道的間距 .......................................................... 9 閥門、消火栓、給水栓的布置原則 ................................................. 10 方案一的管網(wǎng)水力計算 ............................................................................. 10 方案一管網(wǎng)布置圖 .......................................................................... 10 方案一管網(wǎng)節(jié)點參數(shù) ...................................................................... 11 管網(wǎng)平差計算 ................................................................................. 12 方案二的管網(wǎng)水力計算 ............................................................................. 15 方案二管網(wǎng)布置圖 .......................................................................... 15 方案二管網(wǎng)節(jié)點參數(shù) ...................................................................... 15 方案二管網(wǎng)平差計算 ...................................................................... 16 事故校核 ........................................................................................ 19 消防校核 ........................................................................................ 22 方案對比 ................................................................................................... 26 經(jīng)濟對比 ......................................................................................... 26 結(jié)論 ............................................................................................... 27 4 取水構(gòu)筑物的設(shè)計 ................................................................................................ 27 岸邊取水構(gòu)筑物的設(shè)計 ............................................................................. 27 水源的選用要求 ............................................................................. 27 設(shè)計依據(jù) ........................................................................................ 27 設(shè)計計算 ........................................................................................ 28 進水間和吸水室的設(shè)計 ................................................................... 29 進水室吸水室平面尺寸 ................................................................... 29 取水泵房的設(shè)計 ........................................................................................ 30 泵設(shè)計揚程的確定 .......................................................................... 30 選擇水泵和機組 ............................................................................. 30 5 凈水廠設(shè)計 .......................................................................................................... 32 設(shè)計規(guī)模及工藝確定 ................................................................................. 32 原水水質(zhì)情況 ................................................................................. 32 出水水質(zhì)要求 ................................................................................. 32 設(shè)計水量的確定 ............................................................................. 32 水廠處理工藝的選擇 ...................................................................... 32 2021年給水排水工程畢業(yè)設(shè)計 水廠選址 ........................................................................................ 33 6 加藥 ..................................................................................................................... 34 常見絮凝劑 ............................................................................................... 34 混凝劑藥劑的選用與投加 .......................................................................... 34 加藥間和藥庫的一般要求 .......................................................................... 35 加藥間和藥庫的計算 ................................................................................. 35 設(shè)計參數(shù) ........................................................................................ 35 設(shè)計計算 ........................................................................................ 35 投藥管 .......................................................................................... 36 溶解池攪拌設(shè)備 ............................................................................. 36 計量投加設(shè)備 ................................................................................. 36 藥劑倉庫 ........................................................................................ 36 7 混合設(shè)備 .............................................................................................................. 37 混合設(shè)施的一般要求 ................................................................................. 37 混合設(shè)備選擇 ........................................................................................... 37 機械混合池的計算 .................................................................................... 37 8 絮凝池 ................................................................................................................. 40 絮凝池的一般要求 .................................................................................... 40 絮凝池的選擇 ........................................................................................... 40 隔板式絮凝池的計算 ................................................................................. 40 9 沉