天然氣加濕輸送技術(shù)研究

1、同濟(jì)大學(xué)碩士學(xué)位論文天然氣加濕輸送技術(shù)研究姓名：姜長(zhǎng)才申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：動(dòng)力工程指導(dǎo)教師：秦朝葵王岳佾20070301同濟(jì)大學(xué)申請(qǐng)工程碩士論文目黲女號(hào)AbstractNaturalgas，beingacleanandhighqualityfuel，willplayincreasinglyimportantrolebychangingenergystructureofcities，byreducingairpollutionandi

2、mprovingenvironmentButhistoricallymanycitiesadoptedcast—ironpipestodistributemanufacturedgasAdifficultyconfrontedbymanycitiesarisesaswhetheritisfeasibletodistributenaturalgasbyu獬ofoldeastironnetworksCastironpipeshavesome

3、inherentadvantagessuch勰corrosionresistancelongcyclelifeunnecessitytoimplementanticorrosiontechniquesetcAccordinglycastironpipeshadbeenwidelyusedintheearlydevelopmentofChina’ScitygasindustryWithconversionfrommanufacturedg

4、astonaturalgas，thesealingmaterials(oakum／hemp／rubberring)inthebellandspigotjoints(ormechanicaljoints)wouldshrinkgraduallyduetolosingwaterandaromatiehydrocarbonThenleakagemayresultinmeaningsafetyhazardsAdditionallymosteas

5、tironpipesarelocatedincentralpartsofcitieswhereeconomyarehighlydeveloped，anyleakagemayleadtoenvironmentalpollution∞o黼ylosses，andhumandmagesTheimageofgascompanieswouldalsobcnegativelyinfluencedOntheotherhandtheinnerwallso

6、feastironpipeswhidlhadbeenoperatedwithmanufacturedgasforyearsworeenveredbyalayerofdepositsoftardust，ironoxides咖Afterconversionthedepositswouldbeblownoffbythe‘bonedry’naturalcontainingnowatervaporandaromatichydrocarbonWit

7、hthegasflowingthearoppingdepositswouldbemovedtovalves，regulators，stomgesandbendswheretheymaydepositagainEquipmentmalfunctionandpipelineblockagewouldberesultedin，thedistributionc“apacitiesoperationperformancesafetymadeffi

8、ciencywouldbereducedaswellnisurgentlynecessarytocarryoutresearchonallabovedifficultiesresultingfromtheconversionfrommanufacturedgastonaturalgasT缸spaperintroducedseveraltechnicalmeasureswhichhadbeentakenforcastironpipesMa

9、inlyenaphasizedWasthe‘‘gasconditioning“asatransitionaltechniquewhichhadbeenwidelyusedI如rei弘co哪舾船，Ihcauthor’sexperiencewithWuxiGasCompanyWasalsoincludedKeywords：NaturalGas；Castironpipes；Conversion；Retrofit；Gasconditioning