输液管与典型医疗废物组分的混合热解特性  

Co-pyrolysis characteristics of transfusion tubes and other typical medical waste compositions

作　　者：邓娜[1] 于晓慧[1] 张于峰[1] 马洪亭[1] 

机构地区：[1]天津大学环境科学与工程学院,天津300072

出　　处：《华中科技大学学报（自然科学版）》2010年第3期124-128,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50378062);天津市科技创新专项基金资助项目(07FDIDSH02400);教育部科学技术研究重点项目(108030);天津市自然科学基金资助项目(09JCYBJC08100)

摘　　要：为研究聚氯乙烯(PVC)类与其他典型医疗废物组分的混合热解特性,利用差热热重分析仪在氮气气氛下对输液管(TT,含PVC)和塑料、橡胶、生物质、蛋白质及合成纤维类废物样品分别进行了混合热解实验,研究其混合热解行为与规律.结果表明:输液管与其他废物样品混合热解后,均发生了明显或微弱的相互反应;混合反应机制归因于输液管中主要成分PVC在热解时的HCl析出现象,并分别在自由基转移作用、添加剂影响、酸碱中和驱动引起的Ca+对氯的固定作用、酸催化作用下程度不同地促进了各混合物的热解,使对应的失重峰比单独组分的失重峰都要提前;较高温度时PVC的共轭烯烃链裂解在混合物中的影响较小,对应的失重峰与单独组分的失重峰相比没有太大变化.To obtain co-pyrolysis characteristics of mix-medical waste compositions containing polyvinyl chloride （PVC）,pyrolysis experiments of mixtures of transfusion tubes （TT）,whose main ingredient are PVC,and other typical medical compositions including plastics,rubber,biomass,protein and synthetic fiber respectively,were carried out using the thermo-gravimetric analyzer （TGA）.The co-pyrolysis behavior and mechanism were also studied.The conclusions show that：a.Strong or weak interreaction were detected in co-pyrolysis of TT with other medical waste samples;b.The co-pyrolysis mechanism lies in HCl evolution from PVC ingredient of TT.Consequently,the free radical migration,the influence of additive ingredient,the Cl-fixation due to Ca＋ caused by acid-alkali neutralization,and the mechanism of acid-catalyst promoted the pyrolysis process of each mixture respectively and make their TG peaks occur at lower temperature than that of single component;c.The chain degradation of conjugated alkenes of the PVC at higher temperature range slightly affects the blend pyrolysis of the mixtures,and the corresponding weight loss peak had little change.

关 键 词：医疗废物 输液管 聚氯乙烯(PVC) 典型组分 混合热解 

分 类 号：X705[环境科学与工程—环境工程]