【正文】 萬噸 /年合成氨脫硫工 藝 設(shè)計 目錄 1 總論 ............................................................................................................................1 概述 .................................................................................................................... 1 文獻(xiàn)綜述 ............................................................................................................. 2 合成氨原料氣凈化的現(xiàn)狀 ........................................................................... 2 改良 ADA 的簡述 ....................................................................................... 2 ADA 的理化性質(zhì) ........................................................................................ 3 ADA 脫硫的優(yōu)缺點(diǎn) .................................................................................... 3 優(yōu)點(diǎn) ................................................................................................. 3 缺點(diǎn) ................................................................................................. 3 2 生產(chǎn)流程或生產(chǎn)方案的確定 ...................................................................................3 3 生產(chǎn)流程說明 ...........................................................................................................4 反應(yīng)機(jī)理 ............................................................................................................. 4 主要操作條件 ...................................................................................................... 5 溶液組分 .................................................................................................... 5 堿度 ................................................................................................ 5 NaVO3 含量 ..................................................................................... 5 濃度 .......................................................................................... 5 溫度對 ADA 的影響 ................................................................................... 5 CO2 的影響 ................................................................................................. 6 溶液 PH 的影響 .......................................................................................... 7 工藝流程 ............................................................................................................ 7 主要設(shè)備介紹 ...................................................................................................... 8 填料塔 ....................................................................................................... 8 氧化槽 ...................................................................................................... 8 硫泡沫槽 ................................................................................................... 9 過濾器 ...................................................................................................... 9 熔硫釜 .................................................................................................... 10 4 工藝計算書 ............................................................................................................ 10 原始數(shù)據(jù) ........................................................................................................... 10 焦?fàn)t煤氣組分 ........................................................................................... 10 脫硫液組分 .............................................................................................. 10 設(shè)計工藝參數(shù) ........................................................................................... 10 物料衡算 ........................................................................................................... 12 H2S 脫除 .................................................................................................. 12 溶液循環(huán)量 .............................................................................................. 13 生成 Na2S2O3 消耗 H2S 的量 ...................................................................... 13 Na2S2O3 生成量 ......................................................................................... 13 理論硫回收量 ........................................................................................... 13 理論硫回收率 ........................................................................................... 13 生成 Na2S2O3 消耗純堿的量 ...................................................................... 13 硫泡沫生成量 ........................................................................................... 13 入熔硫釜硫膏量 ....................................................................................... 13 回收率 ................................................................................................... 14 熱量衡算 ........................................................................................................... 14 冷卻塔熱量衡算 ....................................................................................... 14 冷卻塔熱負(fù)荷 ................................................................................. 14 冷卻水消耗量 ................................................................................. 15 硫泡沫槽熱負(fù)荷 .............................................................................. 15 蒸汽消耗量 ..................................................................................... 15 熔硫釜熱負(fù)荷 ................................................................................. 15 蒸汽消耗量 .................................................................................. 16 5 主要設(shè)備的工藝計算和設(shè)備選型 ........................................................................ 16 主要設(shè)備的工藝尺寸 .......................................................................................... 16 塔徑 .............................................................................................. 16 填料層高度計算 .............................................................................. 17 壓降的計算 ................................