Uhlobo lwe-Downflow luthetha ukuba i-flow direction of hot air flow iyafana naleyo yezinto eziphathekayo, zombini zihamba ukusuka ekupheleni kwesondlo ukuya ekupheleni kokukhutshwa. Xa izinto eziphathekayo zingena nje kwi-drum, amandla okuqhuba okomisa ngowona mkhulu kwaye umxholo wamanzi wamahhala uphezulu. Isantya sokumisa senxalenye yangaphambili yohlobo lokuhamba yeyona nto ikhawulezayo, kwaye ke njengoko izinto zisiya kwizibuko lokukhupha, ubushushu bezinto buyanyuka, amandla okuqhuba okomisa ayancipha, umgangatho wokufuma wasimahla uyancipha, kunye nesantya sokumisa. nayo iyacotha. Ke ngoko, ukomiswa komgqomo wokomisa ukwehla kunokungalingani kunohlobo lwe-counter-flow.

Uhlobo lwe-counter-flow kukuba ulwalathiso lokuhamba komoya oshushu luchasene nolwalathiso lwentshukumo yezinto, kwaye iqondo lobushushu legubu lelona liphezulu kwisiphelo sokuphuma kwezinto, kwaye iqondo lobushushu lisezantsi kwindawo yokungena. . Iqondo lokushisa lezinto eziphathekayo liphantsi kakhulu xa lingena kuqala kwi-drum, kwaye iqondo lokushisa liphezulu kwi-outlet end, elikwicala elifanayo kunye nokushisa okuphezulu kunye nokuphantsi kwesigubhu. Ngenxa yokuba ubushushu obuphezulu bombhobho bukwicala elifanayo kunye nobushushu obuphezulu bezinto eziphathekayo, kwaye iqondo lokushisa eliphantsi kakhulu likwicala elifanayo nelona qondo lisezantsi lezinto eziphathekayo, ngoko ke amandla okuqhuba ukomisa okuchaseneyo kufana ngakumbi. kunokomisa ezantsi komlambo.

Ngokuqhelekileyo, ukufudumeza komgqomo kuqhutyelwa ikakhulu ngokuhambisa ukushisa. Uhlobo lwe-down-flow luthetha ukuba igumbi lokutsha kunye ne-inlet yokutya ifakwe kwicala elifanayo, kwaye ulwalathiso lokuhamba lokuhamba komoya oshushu lufana nelo lezinto eziphathekayo. Ngaphandle koko, luhlobo lwe-counter-flow.

Xa i-counter-flow drum yomile kwaye ifudumala, ingaphakathi lombhobho wokumisa lingahlulwa libe ziindawo ezintathu ngokuhambelana nokutshintsha kweqondo lokushisa: indawo yokucima, indawo yokumisa kunye nokufudumala. Ngenxa yokuba izinto ziqulethe umswakama xa ziqala ukungena kwi-drum, ukufuma kwizinto eziphathekayo kuya kususwa kwindawo yokuqala, i-aggregate iya komiswa kwindawo yesibini, kwaye idrum iya kuba kwiqondo lokushisa eliphezulu kwindawo yesithathu Qhagamshelana nayo. izinto ezomileyo ukunyusa ubushushu. Ngokubanzi, njengoko iqondo lobushushu lezinto likhula kwigubu elichaseneyo, indawo yokomisa nayo iyanda, ngoko ke amandla omisa ayafana, umahluko wobushushu phakathi kokuhamba komoya oshushu kunye nezinto eziphathekayo mkhulu, kunye nokusebenza kakuhle i-counter-current drying ilula kakhulu. qukuqela phezulu.

KwiIsityalo sokuxuba i-asphalt sohlobo lwedrum, igubu linemisebenzi emibini, ukomisa nokuxuba; ngelixa kwiibhetshi isityalo sokuxuba i-asphaltkwaye iisityalo esiqhubekayo sokuxuba i-asphalt, igubu lidlala kuphela indima yokufudumala. Ngenxa yokuba ukuxuba kwi-batch kunye nezityalo eziqhubekayo zokuxuba i-asphalt ziqhutyelwa ngebhodwe lokuxuba, akukho mfuneko yokongeza i-asphalt kwi-drum yokuxuba, ngoko ke i-drum yokumisa i-countercurrent kunye nokusebenza okuphezulu kokumisa kusetyenziswa.