毕业设计(论文）--20000m3h煤气化煤气湿法脱硫工艺设计.doc

毕 业 设 计 题目： 20000m3/h煤气化 煤气湿法脱硫工艺设计 系 别： 化学与化学工程系 专 业： 化学工程与工艺 姓 名： 学 号： 指导教师： 设计说明 湿法脱硫可以处理含硫量高的煤气，脱硫剂是便于输送的液体物料，可以再生，且可以回收有价值的元素硫，从而构成一个连续脱硫循环系统。栲胶法是湿法脱硫中一种较为成熟的方法，具有脱硫效率高、对硫化氢含量不同的煤气适应性大、脱硫溶液无毒性、对操作温度和压力的适应范围广、对设备腐蚀性小，所得副产品硫磺的质量好的优点。 本设计对煤气化煤气净化脱硫工艺进行了设计计算，着重设计计算了脱硫过程的关键设备，包括物料衡算，热量衡算，填料塔反应器尺寸的计算及辅助设备的查取，并对主要设备进行了机械强度校核。 (1) 物料衡算 设计中脱硫塔气体中的H2S含量为10.0g/m3，净化后H2S含量为0.3 g/m3。在进行物料衡算时，由20000m3/h的原料气进入脱硫塔，计算得脱硫量为194.00 kg/h，溶液循环量为1940m3/h。 (2) 热量衡算 分别对冷却塔，硫泡沫槽，熔硫釜进行了热量衡算，算得冷却塔的热负荷为70919.56 KJ/t NH3，冷却水消耗量为14.18；硫泡沫槽的热负荷为205147.51KJ/t NH3，蒸汽消耗量为93.14 KJ/t NH3；熔硫釜的热负荷为479085.96 KJ/釜，蒸汽消耗量为224.4 Kg/釜。 (3) 填料塔的计算 计算得塔径为4.0m，塔高26.1m，填料层高度15.6m，压降为102Pa。 (4)本设计包含三个图：湿法脱硫主设备图，流程图和物料流程图。 关键词：煤气,栲胶法, 湿法脱硫 Design Notes The method takes off sulphur to handle coal gas with amount of sulphur Gao and takes off the sulphur liquid material that is easy to transport, can be reborn, and can recall worthy chemical element sulphur and constitutes a circulatory system that take off sulphur in a row thus. This design focused a heat of coal gas decontamination to take off a sulphur craft to carry on a design calculation and emphasized a design to compute the key equipments of taking off the sulphur process and included material Heng calculate, calories Heng calculate, the checking of calculation and assistance equipments of the filler tower reactor size takes, and carried on machine strength pit in the school to the main equipments. (1) Material calculation in design of desulphurization tower gas content of 10.0 g/H2S, after purification H2S content of m3 for 0.3 g/m3. When the material balance by 20000 m3/h is the feedgas into h desulphurization tower, calculated 194.00 kg/for desulphurization quantity h, solution for circulation 1940 m3/h . (2) Heat calculation of cooling tower, the sulfur foam respectively the sulfur melting kettle trough, the heat calculation, calculate the cooling tower heat load for 70919.56 KJ/t NH3, cooling wate