Nyob rau hauv cov txheej txheem refining ntawm edible roj, tshav kub exchangers yuav tsum tau ua kom sov los yog txias cov edible roj nyob rau hauv ntau yam kauj ruam.
Piv txwv li, nyob rau hauv lub deodorization theem, peb yuav tsum tau thauj cov undeodorized edible roj ntawm txog 100 degree mus rau lub deodorization ntauwd thiab kub nws mus txog 230 degree nrog chav rau deodorization. Yuav kom txuag tau lub zog thiab txhim kho kev ua haujlwm, peb tuaj yeem siv cov khoom siv hluav taws xob sib hloov, uas muaj ob lub ntsiab zoo. Ua ntej, tsis tsuas yog siv tau cov roj deodorized high-temperature edible oil los preheat lub undeodorized edible roj, tab sis lub deodorization ntauwd siv tau tsawg dua chav ua hauj lwm; Thib ob, cov roj deodorized tuaj yeem ua kom txias ua ntej.