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1、广州市世源气体有限公司GaseousNitrogen气态氮General概述Nitrogenmakesupthemajorportionoftheatmosphere(78.03%byvolume,75.5%byweight).Gaseousnitrogenisinert,colorless,odorless,tasteless,nontoxic,noncorrosive,andnonflammable.Nitrogenisinertandwillnotsupportcombustion;however,itisnotlifesupporting.氮构
2、成了大气的大部分(体积比78.03,重量比75.5%)。气态氮是不活泼的,无色,无嗅,无味,无毒,无腐蚀性,不可燃。氮是不活泼的,不支持燃烧;但是它不是维持生命的必要元素。Nitrogenisinertexceptwhenheatedtoveryhightemperatures,whereitcombineswithsomeofthemoreactivemetals,suchaslithiumandmagnesium,toformnitrides.Itwillalsocombinewithoxygentoformoxidesofnitrogenandw
3、hencombinedwithhydrogeninthepresenceofcatalysts,willformammonia.一般情况下,氮是不活泼的的。当加热到非常高的温度时它会同更加活泼的金属,如锂和镁反应生成氮化物。它还会同氧反应生成氮的氧化物,而且当在有催化剂存在时它会同氢反应生成氨。Sincegaseousnitrogenisnoncorrosive,specialmaterialsofconstructionarenotrequired.VesselsandpipingshouldbedesignedtotheAmericanSociet
4、yofMechanicalEngineers(ASME)standardsorDepartmentofTransportation(DOT)codesforthepressureandtemperaturesinvolved.由于气态氮无腐蚀性,不需要特殊的建材。容器和管道系统要根据相关的压力和温度按照美国机械工程师协会(ASME)的标准或交通部(DOT)的规定来设计。Nitrogenmaybecompressedintocylindersusingwater-oroil-lubricatedcompressorsorbydrycompressions
5、ystems.可以使用水或油润滑的压缩机或干压缩系统把氮压缩进钢瓶。PhysicalandchemicalpropertiesarelistedinTable1.物理和化学性质列于表1。Manufacture生产Nitrogenisproducedatairseparationplantseitherbyliquefactionofatmosphericairandseparationofthenitrogenbydistillationorbyadsorptionprocesses.在空气分离工厂、或者通过空气液化和蒸馏分离出氮,或者通过吸附过程生产
6、氮。Uses用途Nitrogenisthelargestvolumeinorganicchemicalsoldintheworldandhasamultitudeofcommercialandtechnicalapplications.Nitrogen’spropertiesbenefitapplicationssuchasheattreatingatmospheres,blanketingatmospheres,propellants,pneumatics,purgingandpressurizing,andanalyticalcarriergase
7、s.氮是世界上销售量最大的无机化学品,有着广泛的商业和技术应用。氮的性质使许多应用受益,如热处理气氛、覆盖气氛、推进剂、气体力学、净化和加压以及分解运载气体。HealthEffects对健康的影响Beingodorless,colorless,tasteless,andnon-irritating,nitrogenhasnowarningproperties.Humanspossessnosensesthatcandetectthepresenceofnitrogen.Althoughnitrogenisnontoxicandlargelyinert,
8、itcanactasasimpleasphyxiantbydisplacingtheoxyge