Cov dej khov qhuav qhuav, tseem hu ua cov tshuaj tsuag txias, siv cov cua compressed raws li lub zog thiab cov cab kuj, thiab cov dej khov qhuav qhuav raws li cov khoom nrawm, uas yog txau rau saum npoo ntawm cov khoom kom ntxuav los ntawm lub dav hlau tshwj xeeb tu tshuab, siv high- ceev txav cov dej khov qhuav Lub zog hloov pauv xws li lub zog hloov pauv (Δmv), sublimation, thiab melting ntawm cov khoom sai sai freezes av, roj, residual impurities, thiab lwm yam nyob rau saum npoo ntawm cov khoom yuav tsum tau ntxuav, yog li condensing, brittle, thiab tev tawm. , thiab yog muab tshem tawm ib txhij nrog cov airflow. Nws yuav tsis ua rau muaj kev puas tsuaj rau qhov chaw ntawm cov khoom yuav tsum tau ntxuav, tshwj xeeb tshaj yog cov hlau nto, thiab nws yuav tsis cuam tshuam rau qhov tiav ntawm cov hlau nto.
Cov txheej txheem ntxuav tshwj xeeb suav nrog: qhov kub thiab txias txias tev tawm, purging tev, thiab cuam tshuam tev.
cryogenic peeling
Thaum cov dej khov qhuav qhuav ntawm -78.5 degree ua rau ntawm qhov chaw ntawm cov khoom yuav tsum tau ntxuav, lawv ua ntej khov thiab ua rau cov av. Cov av ruptures nyob rau saum npoo yuav tsum tau ntxuav thiab hloov los ntawm ib tug viscoelastic xeev mus rau ib tug khoom lub xeev. Lub brittleness nce thiab viscosity txo qis, ua rau lub zog adsorption ntawm qhov chaw txo qis, thaum thaj chaw saum npoo nce, thiab qee cov av tuaj yeem txiav tawm.
ntxuav stripping
Nyob rau hauv ib qho chaw uas compressed cua yog siv los ua lub hwj chim, nws tsim shearing quab yuam ntawm cov av embritted, ua rau txhua yam puas. Vim tias qhov sib txawv loj hauv qhov qis qis qis ntawm qhov av thiab qhov chaw ntawm cov khoom yuav tsum tau ntxuav, kev ntxhov siab concentration tshwm sim ntawm qhov chaw sib cuag. Cov av yog tev tawm nyob rau hauv qhov kev txiav txim ntawm shear quab yuam.
Kev cuam tshuam tev
Thaum cov dej khov qhuav qhuav nrawm nrawm sib tsoo nrog cov av ntau ntxiv, cov lus hais saum toj no kinetic zog tau hloov mus rau hauv av, kov yeej lub zog adhesion tsawg, thiab qhov tshwm sim shear quab yuam ua rau cov av nkos nrog cov cua ntws, ua tiav. Lub hom phiaj ntawm kev tshem tawm cov av.