Cov asphalt tso tsheb hlau luam (xws li asphalt cia tso tsheb hlau luam thiab asphalt siab kub tso tsheb hlau luam) thiab cov khoom siv hluav taws xob hloov hluav taws xob cua sov thiab cov ntawv thov tsim nyog hauv asphalt pob zeb sib tov yog tus yuam sij kom txo cov nqi peev thiab txhim kho cov txiaj ntsig kev lag luam ntawm cov khoom siv. Kab lus no npaj siab yuav coj QLB1000 asphalt pob zeb sib xyaw cov cuab yeej ntawm Lianshui County Highway Management Station ua piv txwv los piav qhia yuav ua li cas xaiv asphalt tso tsheb hlau luam thiab cov khoom siv cua sov kom tsim nyog.
Kev xaiv asphalt cia tso tsheb hlau luam thiab asphalt siab kub tso tsheb hlau luam yuav tsum ua kom tau raws li cov kev xav tau ntawm kev tsim cov khoom siv asphalt pob zeb sib xyaw ua ke, thiab zam kev nqis peev ntau, pov tseg, thiab cov nqi nce ntxiv. Nws yuav tsum tau txiav txim siab raws li tus nqi ntawm asphalt noj.
Cov khoom ntim asphalt txhua hnub m(t) ntawm cov khoom sib xyaw yog:
m=P·h·k=80×10×5%=40
Qhov twg P---- qhov kev txwv siab tshaj plaws ntawm cov khoom siv asphalt sib xyaw t / h, k---- cov ntsiab lus asphalt, nws tus nqi feem ntau yog 2.5%--8%, thiab tus nqi ib txwm yog 5% , h---- lub sijhawm ua haujlwm tau zoo txhua hnub, teem rau 10, tag nrho asphalt cia ntim M yog
M=A·m=3×40=120
Qhov twg A---- khaws cia coefficient, A＞1, thaum asphalt muab kev thauj mus los deb thiab lub tsheb thauj mus los muaj peev xwm txaus, tus nqi no tuaj yeem raug txo kom tsim nyog.
Tom qab tag nrho asphalt cia ntim tau txiav txim siab, xaiv txoj cai ntawm tus lej thiab qhov loj ntawm asphalt tso tsheb hlau luam yog: tsim nyog rau kev teeb tsa thiab kev teeb tsa ntawm qhov chaw sib xyaw; lub peev xwm ntau lawm ntawm asphalt high-temperature tank yuav tsum ua kom tau raws li qhov xav tau ntawm kev tsim khoom txuas ntxiv ntawm cov khoom sib xyaw; cov khoom siv cua sov ua kom sov me ntsis asphalt li sai tau nyob rau tib lub sijhawm; yooj yim tsim thiab txij nkawm. QLB1000 asphalt qhob mixing system ntawm Lianshui County Highway Management Station siv ob lub 50t elliptical kab rov tav asphalt tso tsheb hlau luam, nrog ib lub tank saum npoo ntawm 30m².
Cov khoom siv hluav taws xob hloov hluav taws xob cua sov feem ntau yog cua sov ib txhij raws li cov khoom siv cua sov. Qhov zoo ntawm cov rwb thaiv tsev asphalt thiab qhov loj ntawm asphalt tank raug xaiv.
Lub tshav kub yuav tsum tau rau cua sov asphalt yog:
Qadd {{0}} qli - qdissipation=M·C (t1-t2)/b + KF (ty-t0)/s
Qhov twg Qadd----cov cua kub yuav tsum tau rau cua sov asphalt, kj/h, qli----cov cua sov yuav tsum tau rau asphalt cua sov, kj/h, qdissipation----cov cua sov poob los ntawm asphalt tank thaum cua sov asphalt, kj/h, M---- qhov loj ntawm cov rhuab asphalt, kg, t1---- qhov kub ntawm asphalt cua sov, ºC, t2---- qhov pib kub ntawm asphalt, ºC, C---- nruab nrab tus nqi ntawm cov cua sov ntawm asphalt ntawm qhov kub thiab txias t1 thiab t2, kj/kg·ºC, K---- kub hloov coefficient ntawm asphalt los ntawm lub tank phab ntsa rau cua, kj/m2·h·ºC, s----lub sij hawm cua sov, h, F---- thaj tsam ntawm kab rov tav asphalt tank, m2, ty---- nruab nrab kub ntawm asphalt, ty=(t0+t2)/2, t0----ambient kub, ºC,
Lub tshav kub yuav tsum tau rau rwb thaiv tsev asphalt yog xam raws li nram no
Q保=M·C·Δt
Qhov twg Q保----kub xav tau rau rwb thaiv tsev asphalt, kj/h, M----mass of insulated asphalt, kg, C----specific heat of insulation asphalt, kj/kg·ºC, Δt ---- tus nqi cua txias, ºC / h, thaum qhov kub ntawm sab nraud yog 12--15ºC, qhov cua txias tsis tshaj 2ºC / h.
Lub asphalt kub ntawm lub tank yog 100 ° C, qhov kub ntawm lub tank kub asphalt yog 100 ° C, qhov kawg kub yog 170 ° C, qhov kub thiab txias yog 10 ° C, thiab lub sij hawm cua sov ntawm lub tank kub yog 2h (s 〈 MYM / P·k). Raws li cov qauv, qhov siab tshaj plaws cua sov yuav tsum tau rau cua sov thiab rwb thaiv tsev ntawm asphalt yuav xam tau.
Q大=Q储保+Q高保+Q高加
Qhov twg Q大---- qhov kub siab tshaj plaws uas yuav tsum tau ua rau cov cua sov thiab rwb thaiv tsev, kj/h, Q储保----tshav kub yuav tsum tau rau cia tank asphalt rwb thaiv tsev, kj/h, Q高保----tshav kub yuav tsum tau rau high-temperature tank asphalt rwb thaiv tsev, kj/h, Q高加----kj/h.
Q cia thiab tiv thaiv=M cia·C cia·Δt=50 × 10³ × 1.6 ×2=1.6 × 105kj/h
Q siab tiv thaiv=M siab·C siab·Δt=10 × 10³ × 2.1 ×2=0.42 × 105kj/h
Q high plus{{0}}M·C(t1-t2)/b+KF(ty-t0)/s=10×10³×1.7(170-100 )/2+10×30({13}})/{14}}.14×105kj/h
Q loj =8.16 × 105kj/h
Lub peev xwm ntawm cov khoom siv cua sov yog xam raws li hauv qab no:
Q´{{0}}Q loj/B=8.16×105/0.75=26×104kCal/h
Qhov twg Q'---- cua sov muaj peev xwm, B---- thermal efficiency ntawm cov khoom cua sov.
