6万吨每年合成氨原料气脱硫（栲胶法）

题 目：学 院：专 业：姓 名：学 号：指导老师：完成时间：

毕 业 设 计 6万吨/年合成氨原料气脱硫工段设计 化学与材料工程学院 化学工程与工艺 2013/5/24

河南城建学院本科毕业设计 设计说明 设计说明 硫化物在合成氨原料气中含量不高，但对生产却危害极大。本设计的任务是将合成氨原料气（半水煤气）中的硫含量由2.7g/m3脱降到0.046 g/m3（0.04MPa,47℃）以下，设计采用模拟实验的方法。 本设计通过工艺评选，采用综合经济效益高的栲胶法。栲胶法属湿法脱硫，半水煤气从脱硫塔底部进入，与自上面流下的栲胶液逆向接触，以吸收混合气中硫化物。脱硫后的半水煤气去变换工段，吸收了硫化物的富液去再生系统。本设计计算包括：对工艺的物料衡算、能量衡算、主塔设备填料塔的塔高塔径、填料的选取以及附属设备选型。由设计任务给出的半水煤气流量为20926.87m3/h基础数据计算出，栲胶液循环量为555.3m3/h，副产品硫产量为124.9kg/h，设计出的脱硫塔直径4m，高22.5m，阶梯环填料用量182.12m3；再生槽直径8.4m，再生槽高度7.0m。 关键词： 合成氨 脱硫 栲胶法 工艺设计

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河南城建学院本科毕业设计 设计说明

Design elucidation Sulfide in the feed gas in the ammonia content is not high, but production is extremely harmful. The task is to design the raw material ammonia gas (semi-water gas) in the sulfur content from 2 g/m3 dropped from 0.1 g/m3 (1.46MPa, 40 ℃) below, design a simulation method. China's current water-gas desulfurization for the semi-main extract of the law, improving the ADA law, by law, such as liquid ammonia, through the design selection process, a comprehensive economic benefits of high extract. Extract of a wet desulfurization, semi-water gas desulfurization tower from the bottom of entry, and down from above the liquid extract reverse, with a mixture of sulfides in absorption. Desulfurization after the semi-water gas to transform Section, the absorption of the sulfide-rich liquid to the regeneration system. This design calculation include: materials calculation, energy calculation, the main tower equipment process calculation and ancillary equipment calculation. From design data calculated based, semi-water gas flow to 20926.87m3 / h, to extract liquid cycle of 555.3 m3 / h, sulfur by-product production of 124.9 kg / h, designed to desulfurizer diameter 4.0 m, high 22.5 m, Rasi Central filler amount of182.12 m3。Regeneration tank diameter 8.4 m, regenerated slot height 7.0 m. .Keywords： Production of Ammonla Desulfurization Extract Law Process Design II

河南城建学院本科毕业设计 目录

目 录

设计说明 ............................................................... I Design elucidation .................................................... II 主要符号一览表 ....................................................... iii 引 言 ................................................................. 1 1脱硫工艺评选 ......................................................... 3

1.1 国内当前常用脱硫工艺 .......................................... 3

1.1.1 氨水液相催化法 .......................................... 3 1.1.2 改良ADA法 .............................................. 4 1.1.3 栲胶脱硫工艺 ............................................ 5 1.1.4 FD法脱硫 ................................................ 6 1.1.5 PDS法脱硫 ............................................... 7 1.1.6 KCA法脱硫 ............................................... 8 1.2 脱硫工艺评选 .................................................. 9

1.2.1 工艺评选 ................................................ 9 1.2.2 工艺确定 ............................................... 12 1.3 栲胶脱硫工艺条件确定 ......................................... 13

1.3.1 栲胶溶液的预处理 ....................................... 13 1.3.2 温度 ................................................... 13 1.3.3 压力 ................................................... 13 1.3.4 溶液因素 ............................................... 14

2 工艺计算 ............................................................ 16

2.1 物料衡算 ..................................................... 16

2.1.1H2S脱除量 ................................................ 17 2.1.2 溶液循环量 ............................................. 17 2.1.3 生成Na2S2O3消耗的H2S ................................. 17 2.1.4 Na2S2O3生成量 .......................................... 17

2.1.5 理论硫回收量 ........................................... 18 2.1.6 理论硫回收率 ........................................... 18 2.1.7 生成Na2S2O3消耗的纯碱量 ............................... 18 2.1.8 硫泡沫生成量 ........................................... 18 2.1.9 入熔硫釜硫膏量 ......................................... 18 2.2 能量衡算 ..................................................... 19

2.2.1 脱硫塔热量衡算（按1mol硫化氢计算） .................... 19 2.2.2 冷却塔热量衡算 ......................................... 20 2.2.3 硫泡沫槽热量衡算 ...................................... 20 2.2.4 熔硫釜热量衡算 ........................................ 21 2.3 脱硫塔工艺计算 ............................................... 22

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河南城建学院本科毕业设计 目录

2.4 压降的计算 .................................................... 24 2.5附属设备的计算 ................................................. 26

2.5.1塔的附属高度的计算 ....................................... 26 2.5.2喷射再生槽工艺计算 ....................................... 27 2.5.3喷嘴计算 ................................................. 27 2.5.4 混合管计算 .............................................. 28 2.5.5吸气室计算 ............................................... 28 2.5.6尾管直径计算De .......................................... 29

3填料塔辅助设备的选择 ................................................ 30 3.1液体分布装置 ................................................... 30 3.2喷淋器的选择 ................................................... 30 3.3填料支承板 ..................................................... 31 3.4 液体再分布器 ................................................. 31 3.5 床层限制板 .................................................... 32 3.6气、液相进出口装置 ............................................. 32

3.6.1气体进口装置 ............................................. 32 3.6.2气体出口装置 ............................................. 32 3.6.3液体进口管 ............................................... 32 3.6.4液体的出口装置 ........................................... 32 3.7封头 ........................................................... 32 3.8人孔、手孔 ..................................................... 32 3.9加强圈 ......................................................... 33 4 机械强度的校核 ...................................................... 34

4.1质量载荷 ...................................................... 34 4.2风载荷的计算 .................................................. 34 4.3壁厚 .......................................................... 35

4.3.1筒体壁厚 ................................................. 35 4.3.2封头壁厚 ................................................. 36

设 计 结 果 ........................................................... 37 参 考 文 献 ........................................................... 40 附 录 ................................................................. 42 致 谢 ................................................................. 43

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