【正文】 年產(chǎn) 24萬(wàn)噸合成氨脫碳工藝設(shè)計(jì) Design for synthetic ammonia to take off the carbon process with outputting 240,000 tons per year 目 錄 摘要 .............................................................................................................................................. Ⅰ Abstract...................................................................................................................................... Ⅱ 主要符號(hào)說(shuō)明 ........................................................................................................................... Ⅲ 引 言 ........................................................................................................................................... 1 第 1章 總 述 ............................................................................................................................. 2 氨的的性質(zhì)和用途 .......................................................................................................... 2 CO2 物理和化學(xué)方面的應(yīng)用 ........................................................................................... 2 脫碳的方法 ...................................................................................................................... 3 第 2章 工藝流程方案的確定 ............................................................................................... 6 脫碳及再生的方法 .......................................................................................................... 6 NHD 的脫碳原理 ............................................................................................................. 6 NHD 溶劑的物理性質(zhì) .................................................................................................. 6 計(jì)算的熱力學(xué)基礎(chǔ) ....................................................................................................... 7 計(jì)算的動(dòng)力學(xué)基礎(chǔ) ....................................................................................................... 7 脫碳及再生工藝參數(shù)的選定 .......................................................................................... 8 脫碳流程的選擇 ........................................................................................................... 8 氣提劑的選擇 ............................................................................................................... 8 塔型的選擇 ................................................................................................................... 9 脫碳再生操作溫度的選定 ........................................................................................... 9 脫碳再生操作壓力的選定 ........................................................................................... 9 脫碳塔氣液比的確定 ................................................................................................. 10 冷凝器的位置及選定 ................................................................................................. 10 腐蝕及材料選擇 ......................................................................................................... 11 脫碳工藝流程圖及流程簡(jiǎn)述 ........................................................................................ 11 第 3章 吸收過(guò)程的工藝計(jì)算 ............................................................................................. 13 物料恒算 ........................................................................................................................ 13 熱量恒算 ........................................................................................................................ 15 原料氣帶入的熱量 ..................................................................................................... 15 單位時(shí)間內(nèi)氣體的溶解熱 ......................................................................................... 16 進(jìn)塔溶液帶入的熱量 ................................................................................................. 16 凈化氣帶出的熱量 ..................................................................................................... 16 塔底富液帶出的熱量 ................................................................................................. 17 吸收塔的工藝設(shè)計(jì) ........................................................................................................ 17 塔徑及氣速的計(jì)算 ..................................................................................................... 17 填料層高度的計(jì)算 ..................................................................................................... 18 塔厚度的計(jì)算 ............................................................................................................. 19 塔壓降的計(jì)算 ............................................................................................................. 20 輔助設(shè)備的計(jì)算和選型 ............................................................................................. 20 塔體的強(qiáng)度校核 ......................................................................................................... 22 第 4章 解吸過(guò)程的工藝計(jì)算 .......................................................................................... 26 物料恒算 ........................................................................................................................ 26 閃蒸過(guò)程的物料恒算 ................................................................................................. 26 氣提過(guò)程的物料恒算 ................................................................................................. 26 熱量恒算 ........................................................................................................................ 27 閃蒸過(guò)程的熱量恒算 ................................................................................................. 27 氣提過(guò)程的熱量恒算 ................................................................................................. 27 氣提塔的工藝設(shè)計(jì) ........................................................................................................ 28 塔徑及氣速的計(jì)算 ...................................................................................................