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科技学院毕业设计论文题目：年产20万吨过磷酸钙生产工艺的设计学科专业：化学工程与工艺学生姓名：XXX导师姓名：XXX完成时间：2016.5.25年产20万吨过磷酸钙生产工艺设计2年产20万吨过磷酸钙生产工艺的设计目录摘要..........................................................................................................(4)1.前言...................................................................................................(5)1.1过磷酸钙的产量及施用现状........................................................(5)1.2过磷酸钙的发展前景....................................................................(5)2.设计原则...........................................................................................(6)2.1工艺路线的选择............................................................................(6)2.1.1现有工艺路线的比较及分析.................................................(6)2.1.2工艺路线影响因素分析......................................................(7)2.2生产过程中的主要化学反应方程式...........................................(9)3.产品方案...........................................................................................(9)3.1产品................................................................................................(9)3.2产品规格........................................................................................(9)3.3产品的主要物性.........................................................................(10)3.4包装贮运......................................................................................(10)4.生产方法及工艺过程.....................................................................(10)4.1生产方法......................................................................................(10)4.2原料准备......................................................................................(11)年产20万吨过磷酸钙生产工艺设计34.3混合化成......................................................................................(11)4.4熟化中和......................................................................................(12)4.4.1熟化工序................................................................................(12)4.4.2中和工序...............................................................................(13)4.5含氟气体的吸收处理..................................................................(14)4.6造粒与干燥.................................................................................(15)5.计算.................................................................................................(17)5.1物料衡算......................................................................................(17)5.1.1数据计算................................................................................(17)5.1.2反应式....................................................................................(18)5.1.3计算........................................................................................(19)5.2热量衡算......................................................................................(25)5.2.1输入热量................................................................................(25)5.2.2输出热量................................................................................(27)6.设备选型.........................................................................................(28)6.1卧式混合机..................................................................................(28)6.2挤压造粒机..................................................................................(29)7.总结.................................................................................................(30)参考文献...............................................................................................(32)年产20万吨过磷酸钙生产工艺设计4年产20万吨过磷酸钙生产工艺的设计学生：XXX指导教师：XXX（三峡大学材料与化工学院）摘要:过磷酸钙是由磷矿粉和硫酸起化学反应后制成的一种含磷的化学肥料。由于具有生产工艺简单，生产操作易于掌握；生产设备容易制造，投资较省；施用后见效快，增产显著等特点，使其在各种磷肥新品种不断涌现的情况下产销量仍然持高不下。本设计采用干法来生产过磷酸钙，原料矿与硫酸在混合机内进行混合，然后进入化成室再经过熟化、中和及造粒干燥后得到成品过磷酸钙。通过物料衡算、热量衡算以及设备选型设计出能符合国家标准的产品的工艺流程。关键词：过磷酸钙;磷矿;生产;干法Thedesignoftheannualoutputof200000tonsofcalciumsuperphosphateproductionprocessStudent:ShiTengkunTutor:ChenWeifeng(CollegeofMaterialsandChemicalEngineering,ThreeGorgesUniversity)Abstract:calciumsuperphosphateisacontainingphosphoruschemicalfertilizerswhichwasmadeofphosphaterockandsulfuricacidfromthechemicalreactionsbecauseoftheproductionprocess,andoperationsimpleiseasytomaster;productionequipmenteasytomake,investsave;Itwillbecomeeffectivequicklyafterused,Increasenotableandsooncharacteristics,sothatUnderthesituationthatthenewvariousphosphatefertilizerbreedspringsupunceasingly,productionandsalesremainedstubbornlyhigh.Thisdesignusesadryprocesstoproducesuperphosphate,therawmaterialoreandsulfuricacidcarryoutcommixturewithinblendingmachine,andthenenterkaseiroomandcuringandafterdryingandgranulationtogetfinishedsuperphosphate.Throughmaterialaccountingquantityof年产20万吨过磷酸钙生产工艺设计5heataccountingandequipmentchoosesatypetodesignsadesignwhichconformtothenationalstandardsproduct。Keywords:calciumsuperphosphate,Phosphorusore,production,dry-process1.前言1.1过磷酸钙的产量及施用现状过磷酸钙在中国是从50年代开始发展的。经过60年的发展，现在全国已经有过磷酸钙厂400多个，达到甚至大于20万吨/年的厂有20多家。过磷酸钙年产量在400万吨P2O5左右，占肥产量的55%。目前，虽然在国内农业上使用的磷肥主要是磷酸二铵和含磷复混肥，过磷酸钙的用量也在逐年降低，但是由于过磷酸钙施用的历史比较长，许多农民仍然还有一定需求，特别是在