课 程 设 计
题 目： 30000m/h煤气化煤气湿
法脱工艺设计
系 别： 化学与化学工程系 专 业： 化学工程与工艺 姓 名：
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河南城建学院本科毕业设计 成绩评定说明
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河南城建学院本科毕业设计 设计说明
设 计 说 明 硫化物在气化煤气中含量不高，但对生产却危害极大。本设计的任务是将原料气（气化煤气）中的硫含量由10.0g/m3脱降到0.3 g/m3（0.05MPa,45℃）以下，设计采用模拟实验的方法。 我国目前用于气化煤气脱硫的工艺主要有栲胶法、改良ADA法、氨水液相催化法等，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，气化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。脱硫后的气化煤气去下一工段，吸收了硫化物的富液去再生系统。本设计计算包括：物料衡算、能量衡算、主塔设备工艺计算以及附属设备的计算。由设计任务给出的气化煤气流量为30000m3/h,由设计基础数据计算出，栲胶液循环量为2910m3/h，副产品硫产量为252.0kg/h，设计出的脱硫塔直径3.5m，塔高25.0m，填料层高15.0m，阶梯环填料填料用量566.8m3。再生槽直径11.3m，再生槽高度7.0m。 关键词： 气化煤气 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 10 g/m3 dropped from 0.3 g/m3 (0.05MPa, 45 ℃) 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 30000 m3 / h, to extract liquid cycle of 2910m3 / h, sulfur by-product production of 252.0 kg / h, designed to desulfurizer diameter3.5m, high25.0m, Packing layer 15.0m，Ladder ring filler amount of 566.8m3。Regeneration tank diameter 11.3 m, regenerated slot height 7.0 m. Keywords： Gasification gas 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 重要符号一览表 ............................................................. 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 .................................................. 4 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 ..................................................... 11 1.3 栲胶脱硫工艺条件确定 ............................................... 12 1.3.1 栲胶溶液的预处理.............................................. 12 1.3.2 温度 ......................................................... 13 1.3.3 压力 ......................................................... 13 1.3.4 溶液因素 ..................................................... 13 1.3.5 反应机理 ..................................................... 15
2.工艺计算 .................................................................. 17
2.1 物料衡算 ........................................................... 17
2.1.1 H2S脱除，G1，kg/h ............................................. 17 2.1.2 溶液循环量LT，m/h ............................................ 18 2.1.3 生成Na2S2O3消耗H2S的量G2, Kg/h ............................... 18 2.1.4 Na2S2O3生成量，G3，Kg/h ........................................ 18 2.1.5 理论硫回收量G4，kg/h ......................................... 18 2.1.6 理论硫回收率φ，﹪ ........................................... 18
2.1.7 生成Na2S2O3消耗纯碱的量G5，Kg/h ............................... 18
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2.1.8 硫泡沫生成量G6，m/h ......................................... 18 2.1.9 入熔硫釜硫膏量G7 ............................................. 19 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 ............................................ 21 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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