纺织印染废水活性污泥干燥器设计计算探讨郭俊旺

2011-02-22K20090041958-。1002-1124201105-0012-06Sum188No.5ChemicalEngineer20115、、--。50000t80%250~300t。。。。。。。[1]。。。160℃。。。1[1-4]*528041。。。。、、、、。X703.1ADesigncalculationoffluidizedbeddrierfordryingsludgefromwastewaterbio-treatmentofdyinghouse*GUOJun-wangWEICai-yunLIUXu-fengHUANGJing-yiWUShu-hongSHIYan-xiuLIZhi-qunHUANGGui-zhenRENJieZENGXue-fengGuangdongInstituteofTextileTechnology,Foshan528041ChinaAbstractTheuseofsludgefromwastewaterbio-treatmentsystemisamongthehottopicsinscientist'slistovertheworld.Bio-sludgeisafueltheoretically,buttheheatfromitscombustionisnotenoughtoevaporatewaterwithinthedewateredsludge.Soavailablewasteheatfordryingofdewateredsludgeisthekeyforsludgecombustioneconomically.Thedryingofdewateredsludgefrombio-treatmentsystemofeffluentofdyeinghousebyventgasfromapowerplantwasdiscussedinthispaper,andthediscussionincludeddryingcurve,dryingrate,thedryingcapacityoffluidizedbeddryer,dryingtime,settlementvelocityorcriticalspacevelocity,diameterofthedryerandmassofwetsludgeinequipment.Keywords:wastewaterfromdyeinghousesludgedryingfluidizedbeddryercalculationDOI:10.16247/j.cnki.23-1171/tq.2011.05.0190.0100.0090.0080.0070.0060.0050.0040.0030.0020.0010.000/kg·s-186℃98℃114℃01234567kgH2O/kg。[2]。。。5~6mm。86、92、98、104、114℃51、2。1[2]Fig.1Dryingcurveofsludge2[2]Fig.2Ratecurveofsludgedryingun=MdXn-1-Xn△τkg·s-12[5]85％20％。85000m3·h-1×2160℃。2.140℃100%。H1=0.622φΡsP-φPs=0.662×1.00×7.377101.3-1.00×7.377=0.04954kg/kgvH=129+H118ωω×22.4×t+273273=129+0.0495418ωω×22.4×160+273.15273.15=1.323m3·kg-1Ws=2×850001.323×3600=35.70kg·s-1L=Ws1+H=35.701+0.04954=34.02kg·s-1G1X1=ω11-ω1X2=ω21-ω2=0.201-0.20=0.250Gc=G11-ω1W=GcX1-X2=1-ω1G1ω11-ω1-0.25W=LH2-H1=34.02×H2-0.04954=1-ω1G1ω11-ω1-0.25H2=1-ω134.02G1ω11-ω1-0.25+0.04954Q=LI1-I2=GcI'1-I'2+QL≈Gccs+X2cwt'2-t'1+QLI1=1.01+1.88H1t1+2492H1I2=1.01+1.88H2t2+2492H2Q=L1.01+1.88H1t1+2492H1ωω-1.01+1.88H2t2+2492H2ωωωω=GcI'1-I'2+QL≈Gccs+X2cwt'2-t'1+QLt2≈1.01+1.88H11.01+1.88H2t1+2492H1-H2ωω1.01+1.88H2-Gccs+X2cwωωt'2-t'1ωω+QLL1.01+1.88H2ωωt2≈1.01+1.88H1ωω1.01+1.881-ω1ωω34.02G1ω11-ω1-0.25+0.495ωω4t1/kgH2O/kg2.521.510.50050010001500200025003000/s86℃92℃98℃104℃114℃*20110513+2492H1-1-ω1ωω34.02G1ω11-ω1-0.25+0.495ωω4ωω1.01+1.881-ω1ωω34.02G1ω11-ω1-0.25+0.495ωω4-G11-ω1ωωcs+X2cwωωt'2-t'1ωω+QLL1.01+1.881-ω1ωω34.02G1ω11-ω1-0.25+0.495ωω4ωω11H1=0.4954kg/kgcs=1.05kJ·kg·℃-1[1]X2=0.25kg/kgcw=4.187kJ·kg·℃-1t1=160℃t'1=20℃t'2=90℃L=34.02kg·s-1t2≈1.01+1.88×0.0495ωω41.01+1.881-ω1ωω34.02G1ω11-ω1-0.25+0.495ωω4×160+24920.04954-1-ω1ωω34.02G1ω11-ω1-0.25+0.495ωω4ωω1.01+1.881-ω1ωω34.02G1ω11-ω1-0.25+0.495ωω4-G11-ω1ωω1.05+0.25×4.18ωω790-2ωω034.02×1.01+1.881-ω1ωω34.02G1ω11-ω1-0.25+0.495ωω4ωω2t2≈1.01+1.88×0.0495ωω41.01+1.881-ω1ωω34.02G1ω11-ω1-0.25+0.495ωω4×160+24920.04954-1-ω1ωω34.02G1ω11-ω1-0.25+0.495ωω4ωω1.01+1.881-ω1ωω34.02G1ω11-ω1-0.25+0.495ωω4-G11-ω1ωω1.05+0.25×4.18ωω790-2ωω034.02×1.01+1.881-ω1ωω34.02G1ω11-ω1-0.25+0.495ωω4ωω333。3t2G1ω1。。110℃0.850.850kg·s-10.800.900kg·s-1。3Fig.3relationoftemperatureofexitgaswiththewatercontentandthetreatmentcapacityofwetsludge[1]110℃90℃20℃。3110℃0.900kg·s-10.06939kg/kg45.62℃。15%0.7826kg·s-12817kg·h-10.06823kg/kg。10~30℃20~50℃。20℃55℃。2.285.0%6.0kg/kg。114℃4。。4114℃[2]Fig.4Ratecurveofsludgedryingat114℃160140120100806040t2/℃0.00.51.01.52.0/kg·s-10.850.8250.800.7750.7500.7250.0100.0080.0060.0040.0020.000/kgH2O·s-10123456/kgH2O/kgX2X'2X'1X1114℃14201105*3025201510500.00.20.40.60.81.0/aw/wt%30℃45℃60℃2.2.1τ0=GcAucX'1-X1XX4。uc0.00425kg·m2·s-1。5~6mm。0.7826kg·s-1Gc=F1-ω1=0.7826×1-0.85=0.1118kg·s-1τ0=GcAucX1-X'1XX=0.1118πd2p×0.00425π×5.5×10-3XX2×1π6×5.5×10-3XX31π6×d3p×6-5.26XX5=0.1118×π×5.5×10-3XX2πd2p×0.00425×1π6×5.5×10-3XX31π6×d3p×6-5.26XX5=0.11180.00425×dp5.5×10-3×6-5.26XX5=3.5184×10-3dp0.00425π×5.5×10-3XX21π6×5.5×10-3XX31π6×d3p。2.2.20.00851kg·s-1:τ1=GcAucX1-X'2XX=0.1118πd2p×0.00851π×5.5×10-3XX2×1π6×5.5×10-3XX31π6×d3p×5.265-3.67XX6=0.11180.00851×15.5×10-3×5.265-3.67XX6dp=3.7955×10-3dp52.2.3τ2。τ2=-GcAX'2X0乙dXfX-X*XX=GcAX0-X*X'2-X*乙dX-X*XXfX-X*XX6uX-X*τ2=GcX'2-X*XXAu'2InX-X*X'2-X*6au'2X'25。5[5]Fig.5isothermalabsorptioncurveofcornstarch5。[5]。10.014kPa125℃232.2kPa0.043502.5%0.02564kg/kg。τ2=GcX0-X*XXAu0InX0-X*X2-X**20110515=0.1118×3.676-0.0256ρρ4πd2p×0.00851π×5.5×10-3ρρ2×1π6×5.5×10-3ρρ31π6×d3p×In3.676-0.025640.25-0.02564=0.1118×3.676-0.0256ρρ40.00851×dp5.5×10-3××In3.676-0.025640.25-0.02564=2.6425×104dpττ=τ0+τ1+τ2τ=τ0+τ1+τ2=3.5184×103+3.7955×103+2.6425×104ρρdp=3.3739×104dp71mm33.7s2mm67.4s。。10mm337s5.5min。1.510min0.7826×600=469.56kg。2.220%24%[4]。ρ80=1042kg·m-31m380%V80=1.0m320%mc=1042×0.2=208.4kg20%m20=208.41-0.2=260.5kg24%V20=1-0.24=0.76m3ρ20=260.50.76=342.7kg·m-32020%。135℃ρ=0.8647kg·m-3μ=2.3549×10-5Pa·suT=0.153gd1.6pρp-ρρρρ0.4μ0.6ρρ11.4=0.153×9.81×347.2-0.864ρρ70.86470.4×2.3549×10-5ρρ0.6ρρ11.4d1.61.4p=5110.1d1.143pRe=dpuTρμ=dp5110.1d1.143pρμ=5110.1d2.143pρ×0.86472.3549×10-5=1.876×108d2.143pdp=1mmuT=5110.1d1.143p=5110.1×0.0011.143=1.9048m·s-1。Re=69.86＞2。dp=2mmuT=1.74dpgρp-ρρρρ姨=1.74×0.002×9.81×347.2-0.864ρρ70.8647姨=4.878m·s-1Re=308。17000m3·h-1D=Vsu姨=2×850003600×u姨=47.22u姨1mmD=4.972mdp=2mmD=3.111m。31。2。3。4。。16201105*。、。