【正文】 畢業(yè)（設(shè)計）論文 45kt/a 尿素蒸發(fā)造粒工段工藝初步設(shè)計 四川理工學(xué)院畢業(yè)設(shè)計（論文） 目 錄 I 目 錄 第一章 緒論 .............................................................................................................. 1 ....................................................................................... 1 尿素 ......................................................................................................... 1 尿素的工業(yè)生產(chǎn) ....................................................................................... 1 .............................................................................................. 2 循環(huán)工藝 .............................................................................................. 2 ............................................................................................................ 3 .................................................................................... 3 .................................................................................... 4 ..................................................................................................... 4 說明 ......................................................................................................... 4 流程簡圖 .................................................................................................. 5 第二章 物料衡算 .................................................................................................... 6 ................................................................................................................... 6 ............................................................................................................ 6 工藝計算 .................................................................................................. 6 工藝流程簡圖 ........................................................................................... 6 工藝指標(biāo) ................................................................................................. 6 ............................................................................................................ 6 ..................................................................................................... 7 條件 ........................................................................................................ 7 計算 ........................................................................................................ 7 一段蒸發(fā)器物料平衡表 ........................................................................... 10 二段蒸發(fā)系統(tǒng) ...................................................................................................11 條件 ........................................................................................................11 計算 ........................................................................................................11 二段蒸發(fā)器物料平衡表 ........................................................................... 12 第三章 熱量衡算 .................................................................................................. 14 ................................................................................................ 14 計算 依據(jù) ................................................................................................ 14 四川理工學(xué)院畢業(yè)設(shè)計（論文） 目 錄 II 計算條件 ................................................................................................ 14 熱量衡算計算過程 .................................................................................. 14 閃蒸槽熱量平衡表 .................................................................................. 15 ......................................................................................... 16 計算依據(jù) ................................................................................................ 16 熱量衡算計算過程 .................................................................................. 17 一段蒸 發(fā)器熱量平衡表 ........................................................................... 19 ......................................................................................... 19 計算依據(jù) ................................................................................................ 19 熱量衡算計算過程 .................................................................................. 19 二段蒸發(fā)器熱量平衡表 ........................................................................... 21 第四章 設(shè)備選型 .................................................................................................. 22 ................................................................................................ 22 操作條件 ................................................................................................ 22 物料衡算 ............................................................................................... 22 體積 ...................................................................................................... 22 規(guī)格 ....................................................................................................... 22 ......................................................................................... 22 已知條件 ................................................................................................ 22 傳熱計算 ................................................................................................ 23 加熱室計算 ............................................................................................ 26 分離室計算 ............................................................................................ 27 規(guī)格與參數(shù) ............................................................................................ 27 ......................................................................................... 27 已知條件 ..........