不同气氛下高温固硫产物硫酸钙和硫化钙相互转化机理研究

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1、浙江大学博士学位论文不同气氛下高温固硫产物硫酸钙和硫化钙相互转化机理研究姓名：范红宇申请学位级别：博士专业：工程热物理指导教师：曹欣玉;周俊虎20040601浙江人学博士学位论文AbstractMutualTransformationMechanismofCalciumSulfateandCalciumSulfideatHi曲TemperatureinDifferentReactingAtmosphereABSTRACThlthisarticle．theoxidationmechanismofcalciumsulfideandthedecompositionmechanismofc

2、alciumsulfatewasdiscussedindetailwitlllargeamountsoftheoryanalysisandmechanismresearch．sothatafullunderstandingofthestageddesulfurizationmechanisminPCCboilerscanbetaken．Inaddition．atwostagedesulfurizationindustrialtestonWshapePCCboilerwastaken．Firstly,thedecompositionmechanismunderdifferentoxi

3、dizing，inertandreduceingatmospherewagstudiedindetailandthedeeompositionreactionkinetlcswasstudledusingFreeman-Carollmethod．111addition．Methylenebluespectrophotometricmethodandthesimultaneousgenerationofcalciumsulfideandcalciumoxidewasadoptedtotakeadeepresearchofthedecompositionmechanismofthede

4、compositionmechanismundercarbonmonoxideatmospherewithdifferentconcentration，moreoverthedecompositionreactiontypeandtheultimatecontentofcalciumsulfideinreactionproductwasanalyzed．Secondly,thepossibilityofcalciumsulfidegenerationinCaO-S02--COsystemwasstudiedusingFACTsoftware．Afterwardsafixedbedq

5、uartzreactorsystem，RosemountegasanalyzerandMethylenebluespectrophotometricmethodwereusedtotakeadeepresearchonthededulfurizationreactionandthetransformationfromCaC01t0CaSunderfuel-richcondition．嘶rdly,thesolid．solidreactionofcalciumsulfideandcalciumsulfate．controllingstepoftheoxidationreactionof

6、calciumsulfideand血edecompositionreactionofcalciumsulfate．wasstudiedindetail．nlcsolid-solidreactionkineticswasstudiedusingFreeman—Carollmethod，Inaddition，somekineticsparameterswereusedtostudythesuperioritybetweendifrerentreactions：tllesolid．solidreaction．thedecompositionreactionofcalciumsulfate

7、andtheoxidationreactionofcalciumsulfidewithcarbondioxide．Moreovertheinfluenceofcaleiumsulfidecontentandcalciumsulfatecontentonreactionrateofsolid—solidreactionwasalsoanalyzed。Afterwards，theoxidationreactionofcalciumsulfideunderdifierent