【正文】 年產 5 萬噸食品級 CO2生產工藝的設計 The Process Design of 50kt/a Foodgrade CO2 摘要 ................................................................................................................................................. I Abstract ......................................................................................................................................... II 引言 ................................................................................................................................................ 1 第一章 緒論 ............................................................................................................................. 2 CO2的性質 ....................................................................................................................... 2 CO2的用途 ....................................................................................................................... 2 食品級 CO2的用途 ...................................................................................................... 2 工業(yè)級 CO2的用途 ....................................................................................................... 3 國內 CO2的市場概況 ..................................................................................................... 3 國外 CO2的市場概況 ..................................................................................................... 5 國內 CO2的市場概況 ..................................................................................................... 5 詳述國內 CO2消費分布和結構 ..................................................................................... 7 第二章 工藝流程設計 .......................................................................................................... 9 食品級液態(tài) CO2的生產方法 ......................................................................................... 9 生產食品級液態(tài) CO2的原料氣來源 ........................................................................... 10 石灰窯氣、鍋爐煙道氣等低 CO2 濃度原料氣 ........................................................ 10 合成氨廠變壓吸附脫碳排放的二氧化碳原料氣 ...................................................... 10 高濃度二氧化碳原料氣 ............................................................................................. 11 酒精廠發(fā)酵氣 ............................................................................................................. 11 傳統(tǒng)生產工藝 ................................................................................................................ 11 生產工藝的改進 ............................................................................................................ 12 生產工藝的簡述 ............................................................................................................ 13 生產工藝 系統(tǒng)流 程 ..................................................................................................... 13 生產工藝 過 程 ............................................................................................................. 14 主要生產設備 ................................................................................................................ 14 提純塔 ......................................................................................................................... 14 蒸發(fā)冷凝器 ................................................................................................................. 15 一級脫硫器和二級脫硫器 ......................................................................................... 15 干燥器 ......................................................................................................................... 16 第三章 物料衡算和熱量衡算 .......................................................................................... 17 物料衡算 ......................................................................................................................... 17 提純塔的物料衡算 ..................................................................................................... 19 熱量衡算 ........................................................................................................................ 21 一、二級預冷器熱量衡算 ......................................................................................... 21 蒸發(fā)冷凝器熱量衡算 ................................................................................................. 21 熱量衡算 ..................................................................................................................... 22 第四章 提純塔的設計計算 ............................................................................................... 24 提純塔工藝條件 ............................................................................................................ 24 加料方式 ..................................................................................................................... 24 進料狀況 ..................................................................................................................... 24 塔頂冷凝方式 ............................................................................................................. 24 回流方式 ..................................................................................................................... 24 加熱方式 ..................................................................................................................... 24 操作壓力 ..................................................................................................................... 25 提純塔工藝計算 ............................................................................................................ 25 相平衡方程的確立 ..................................................................................................... 25 平均摩爾質量 ............................................................................................................. 26 回流比的確定 ....................................................................................................