【正文】 工藝計算說明 ................................................................................................................................ 10 概述 ..................................................................................................................................... 10 確定加熱站及泵站數(shù) .................................................................................................................... 11 熱力計算 ............................................................................................................................. 11 水力計算 ............................................................................................................................. 12 站址確定 ............................................................................................................................. 13 校核計算說明 ................................................................................................................................ 14 熱力、水力校核 ................................................................................................................. 14 進出站溫度校核 ................................................................................................................. 14 進出站壓力校核 ................................................................................................................. 14 壓力越站校核 ..................................................................................................................... 14 熱力越站校核 ..................................................................................................................... 15 動、靜水壓力校核 ............................................................................................................. 15 反輸運行參數(shù)的確定 ......................................................................................................... 15 站內(nèi)工藝流程的設計 .................................................................................................................... 15 制定和規(guī)劃工藝流程 .......................................................................................................... 16 輸油站工藝流程 .................................................................................................................. 16 流程簡介 .............................................................................................................................. 16 主要設備的選擇 ............................................................................................................................ 17 輸油泵的選擇 選泵原則 .................................................................................................... 17 加熱爐的選擇 ..................................................................................................................... 17 首末站罐容的選擇 ............................................................................................................. 18 閥門 ..................................................................................................................................... 18 第 3 章 工藝設計計算書 ............................................................................................................................. 19 經(jīng)濟管徑 ......................................................................................................................................... 19 經(jīng)濟流速 ............................................................................................................................. 19 確定管道承壓 ..................................................................................................................... 20 熱力計算與確定熱站數(shù) ................................................................................................................ 20 確定計算用各參數(shù) ............................................................................................................. 20 確定流態(tài) ............................................................................................................................. 20 總傳熱系數(shù)的確定 .............................................................................................................. 22 最小輸量下確定熱站數(shù) ..................................................................................................... 22 水力計算與確定泵站數(shù) ................................................................................................................ 25 迭代算出站油溫 .................................................................................................................. 25 判斷翻越點 ......................................................................................................................... 25 選泵確定泵站數(shù) .................................................................................................................. 25 確定站址 ............................................................................................................................. 26 不同輸量下的布站方案 ................................................................................................................ 27 最小輸量時布站方案 ......................................................................................................... 27 最大輸量時布 站方案 ......................................................................................................... 27 各站運行參數(shù) ................................................................................................................................ 28 輸量最大時參數(shù) ................................................................................................................. 28 60%輸量時參數(shù) ................................................................................................................... 29 反輸計算 ........................................................................................................................................ 29 反輸量的確定 .........................................................................................................