25t-h循环流化床锅炉与复合相变换热器配套使用的技术总结

205200010POWERENGINEERINGVol.20No.5Oct.2000839:1000-6761(2000)05-0839-0325t/h林　杰1,　余　平2,　张志宇2,　陈应明3,　孔详谦4(1.晋江凤竹针织漂染实业有限公司,泉州362000;2.九江科洋热技术设备有限公司,九江332000;3.江西动力设备工程集团,南昌330001;4.上海交通大学能源系,上海200240):复合相变换热器在用作大幅度降低锅炉排烟温度的同时,又能使尾部受热面壁温保持较高温度,是一种彻底消除因受热面结露而造成低温腐蚀的高效节能设备。江西锅炉厂生产的JG25-3.82/450-WⅡ型锅炉是第一台采用复合相变换热空气预热器循环流化床锅炉,已在福建凤竹集团有限公司运行。在运行中,锅炉的热工技术性能良好。表1:;;;;;:TK229.6+6:A:2000-01-12:(1955-),,1,210,,,80,,,,,,,,,,,12%,,,160C,130C,30C1.7%,,,130C,100C,90110C,,2:,,,,,,,,,,40,;,,,,180mm,,1,,,,1,,,0.40.5MPa,50Hz,1.5m3/min,,,,,,,,,;,,,,,70%(,),25h(5min),48h,50Pa,5C,2JG25-3.82/450-WVY=2.5%,,di0.2mm30%,,65%;,68%,25%,,,0.18di0.8mm,di0.18mm,,,,,11di1.25(mm)0.80.25(mm)0.30.8(mm)0.180.3(mm)0.18(mm)72.88%23.06%4.06%30.98%18.6%31.4%18.93%44.72%55.28%,Cfh=28%,,Cfh10%,,,di0.18mm,1,,di0.18mm18.93%,,,500Pa,,,LVH+,,,:,+,3160170C,,,,840207080C,,:120C,,50C,;,,,(),,92117C,,4000Pa1600Pa,,,425t/h,125C,140C,100C,,,,81%,28t/h,,,,TechnicalSummarizationofCombininga25t/hCirculatingGas-FluidizedBedBoilerwithaCompoundPhase-ChamgingHeatExchangerLINJie1,YUPing2,ZHANGZhi-yu2,CHENYeng-ming3,KONGXiang-qian4(1.FengzhuGroupCo.Ltd,Quanzhou362200,China;2.JiujiangKeyangHeatingDeviceTechnologyCo.Ltd,Jiujiang332000,China;3.JiangxiPowerEquipmentandEngrg.(GroupCo.)Co.Ltd,Nanchang330001,China;4.Dept.ofEnerglyShanghaiJiaotongUniv.,Shanghai200240,China)Abstract:Thecompoundphase-changingheatexchangerisaneffectiveapparatuswhichreducesboilerexhaust-gastemperaturegreatly,andmeanwhile,holdsthewall-temperatureoftheback-heatingsur-facehigherabovethedewpointoftheexaust.Therefore,itisahigh-efficiencydeviceforitsenergy-savingaswellasalong-lifedeviceforitavoidscorrosionthoroughlythatmaybecausedbytoformontheheating-surface.TypeJG25-3.82/450-WboilerproducedbyJiangxiBoilerManufactureristhefirstoriginalunitofcirculatinggas-fuidizedbedapplyingcompoundphase-changingheatexchangerforair-preheating.IthasbeenoperatedwellinFengzhuGroupCo.Ltd.Someexcellentthermaltechnol-ogycharacteristicshaveobviouslyvisualizedinthisboiler'sperformance.Table1.Keywords:circulatinggas-fluidizedbed;compoundphase-changingheatexchanger;fin-tube;lowersonic-frequencyashremover;cycloneseparator;screening8415