Vacuum freeze dryers hi drying equipment tha tak a ni a, low-temperature sublimation hmangin material atanga moisture a paih chhuak thin. Ei leh in, damdawi, biological product, leh chemical industry-ah te an hmang nasa hle. An thu bulpui ber chu vacuum environment-a material temperature chu freezing point hnuai lama tihhniam a ni a, chu chuan moisture chu solid atanga gaseous state-ah direct-in a sublimate a, chu chuan temperature sang avanga material active ingredients tihchhiat a pumpelh a ni. A hnuaia tarlan te hian hman dan tur chu kawng pathum a\\angin a chipchiar a, chungte chu: pre-operation preparation, operating procedures, leh fimkhur dan te.
Pre-operation Inbuatsaihna
Thil hmanrua enfiah: Cold trap, vacuum pump, heating system, leh control system te chu a hnathawh dan pangngaiah a awm tih finfiah rawh. Cold trap temperature chu preset value a thleng tawh em tih enfiah rawh (a tlangpuiin pre-cooling to below -40℃), vacuum pump oil level chu standard range chhungah a awm em tih leh sealing rings te chu a la awm em tih enfiah rawh.
Material Pretreatment: Material characteristic angin pre-freezing treatment tih tur a ni. Entirnan, ei tur thilte chu a vawt kim theih nan -30℃atanga -40℃thleng darkar 12-24 chhung vawt a ngai a; damdawi siamna hmanruaah hian crystal chhiatna a awm loh nan controlled freezing rates a ngai a ni. Pre-freezing tling lo chuan sublimation stage-ah a tlakbuak thei a, hei hian thil siam zawh tawh quality a tichhe thei a ni.
Loading leh Layout: Material tray-ah chuan material chu a rualin theh darh la, a thickness recommended chu 5-10mm a ni. Material tray tam tak chuan vapor diffusion a tihbuai loh nan spacing (eg, 38mm) a vawng reng tur a ni. Volatile components nei material tan chuan air permeability tha tak nei packaging material hmang ang che.
Hnathawh dan tur
Pre-freezing Stage: Intelligent control panel hmangin pre-freezing temperature (-40℃to -50℃) leh hun (material awm zat a zirin siamrem, a tlangpuiin darkar 2-4) set rawh. Hetiang stage chhung hian temperature inthlak danglamna avanga ice crystal siam tam lutuk loh nan cold trap temperature chu a stable em tih enfiah thin ang che.
Vacuuming leh Sublimation Drying: Pre-freezing hnuah vacuum pump chu start la, system pressure 10Pa hnuai lam a tihhniam theih nan (no-load hnuaiah standard vacuum 5Pa neih theih a ni). Hetih lai hian material chhunga ice chu a sublimate tan a, conductive heating system (eg, shelf heating) atanga energy a mamawh a ni. Localized overheating awm loh nan heating temperature chu zawi zawiin tihsan tur a ni (-20℃atanga tan tur a ni , stage tin 5-10℃a tihsan tur a ni).
Desorption Drying Stage: Material temperature chu ambient temperature a hnaih chuan desorption drying stage a intan thin. Hetih lai hian vacuum level chu tihhniam belh a ngai a (2 Pa hnuai lam thlengin), shelf temperature chu 30-50℃thlengin tihsan a ngai a, chu chuan residual bound water chu a paih chhuak thei a ni. Hetih lai hian sample temperature display hian temperature sang lutuk hian material denaturation a thlen loh nan monitoring chhunzawm zel a ngai a ni.
Shutdown leh Sampling: Drying hnuah heating system kha off hmasa la, chutah chuan material temperature room temperature-a a tlak hnuah vacuum pump off rawh. A tawp berah chuan drying nitrogen dah la, vacuum chu tichhiain, material chu paih chhuak rawh. High-value materials tan chuan one-button electric defrost function hman a tha a, chu chuan hmanrua chu a normal state-ah rang takin a dah leh thei ang.
