栲胶法脱硫设计

课程设计题目：30000m3/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：河南城建学院本科毕业设计成绩评定说明1河南城建学院本科毕业设计设计说明I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0.3g/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河南城建学院本科毕业设计设计说明IIDesignelucidationSulfideinthefeedgasintheammoniacontentisnothigh,butproductionisextremelyharmful.Thetaskistodesigntherawmaterialammoniagas(semi-watergas)inthesulfurcontentfrom10g/m3droppedfrom0.3g/m3(0.05MPa,45℃)below,designasimulationmethod.China'scurrentwater-gasdesulfurizationforthesemi-mainextractofthelaw,improvingtheADAlaw,bylaw,suchasliquidammonia,throughthedesignselectionprocess,acomprehensiveeconomicbenefitsofhighextract.Extractofawetdesulfurization,semi-watergasdesulfurizationtowerfromthebottomofentry,anddownfromabovetheliquidextractreverse,withamixtureofsulfidesinabsorption.Desulfurizationafterthesemi-watergastotransformSection,theabsorptionofthesulfide-richliquidtotheregenerationsystem.Thisdesigncalculationinclude:materialscalculation,energycalculation,themaintowerequipmentprocesscalculationandancillaryequipmentcalculation.Fromdesigndatacalculatedbased,semi-watergasflowto30000m3/h,toextractliquidcycleof2910m3/h,sulfurby-productproductionof252.0kg/h,designedtodesulfurizerdiameter3.5m,high25.0m,Packinglayer15.0m，Ladderringfilleramountof566.8m3。Regenerationtankdiameter11.3m,regeneratedslotheight7.0m.Keywords：GasificationgasDesulfurizationExtractLawProcessDesign河南城建学院本科毕业设计目录i目录设计说明..................................................................IDesignelucidation..........................................................II重要符号一览表.............................................................iii引言........................................................................11.脱硫工艺评选...............................................................31.1国内当前常用脱硫工艺................................................31.1.1氨水液相催化法................................................31.1.2改良ADA法....................................................41.1.3栲胶脱硫工艺..................................................41.1.4FD法脱硫......................................................61.1.5PDS法脱硫.....................................................71.1.6KCA法脱硫.....................................................81.2脱硫工艺评选........................................................91.2.1工艺评选......................................................91.2.2工艺确定.....................................................111.3栲胶脱硫工艺条件确定...............................................121.3.1栲胶溶液的预处理..............................................121.3.2温度.........................................................131.3.3压力.........................................................131.3.4溶液因素.....................................................131.3.5反应机理.....................................................152.工艺计算..................................................................172.1物料衡算...........................................................172.1.1H2S脱除，G1，kg/h.............................................172.1.2溶液循环量LT，m3/h............................................182.1.3生成Na2S2O3消耗H2S的量G2,Kg/h...............................182.1.4Na2S2O3生成量，G3，Kg/h........................................182.1.5理论硫回收量G4，kg/h.........................................182.1.6理论硫回收率φ，﹪...........................................182.1.7生成Na2S2O3消耗纯碱的量G5，Kg/h...............................182.1.8硫泡沫生成量G6，m3/h.........................................182.1.9入熔硫釜硫膏量G7.............................................192.2能量衡算...........................................................192.2.1脱硫塔热量衡算（按1mol硫化氢计算）...........................192.2.2冷却塔热量衡算...............................................202.2.3.硫泡沫槽热量衡算............................................212.2.4熔硫釜热量衡算...............................................212.3脱硫塔工艺计算.....................................................22河南城建学院本科毕业设计目录ii2.3.1塔径计算：...................................................222.3.2填料高度计算：...............................................242.3.3填料层高度的计算..............................................252.3.4塔高计算：...................................................252.4喷射再生槽工艺计算.................................................262.4.1槽体计算：...................................................262.4.2喷嘴计算：...................................................262.4.3混合管计算：.................................................272.4.4吸气室计算：.................................................272.5辅助设备的选择.....................................................292.5.1液体分布装置（喷淋装置）....................................292.5.2液体再分布器.................................................292.5.3填料支承板........................................