Cov desiccants feem ntau muab faib ua ob pawg raws li lawv txoj cai nqus dej noo thiab daim ntawv thov: tshuaj adsorption thiab lub cev adsorption. Cov khoom sib txawv muaj lawv tus kheej cov khoom tshwj xeeb thiab siv tau ntau yam.
Tshuaj adsorption desiccants
Cov desiccants nqus dej noo los ntawm cov tshuaj tiv thaiv tsis tuaj yeem nrog dej. Lawv muaj peev xwm nqus tau noo noo zoo tab sis feem ntau tsis yog - tauj dua tshiab.
Quicklime (Calcium Oxide, CaO)
Tom qab nqus dej, nws tsim calcium hydroxide (Ca(OH)₂) thiab tso tawm ntau cov cua sov.
Qhov nqus dej noo tuaj yeem ncav cuag ntau dua 35% ntawm nws qhov hnyav, ua rau nws qis - nqi thiab ua haujlwm tau zoo.
Qhov tsis zoo yog nws cov alkalinity muaj zog, ua rau muaj kev pheej hmoo ntawm corrosion, thiab tshwj xeeb tshaj yog khaus rau lub qhov muag thiab tawv nqaij. Nws tau maj mam hloov los ntawm cov ntaub ntawv zoo dua.
Calcium Chloride (CaCl₂)
Nws nqus dej los ntawm ob qho kev ua haujlwm ntawm lub cev adsorption thiab tshuaj lom neeg cov tshuaj tiv thaiv, tsim cov gel lossis tshuaj tom qab nqus dej noo.
Nws muaj peev xwm nqus dej noo heev, ncav cuag 300% ntawm nws tus kheej qhov hnyav hauv cov thawv thauj khoom, 10-20 npaug ntawm silica gel.
Dav siv nyob rau hauv siab -cov av noo ib puag ncig xws li warehouses thiab tsheb thauj mus los, tab sis yuav tsum tau muab ntim ntim los tiv thaiv to.
Lub cev Adsorption Desiccants Cov desiccants cia siab rau lawv cov qauv ntxeem tau rau lub cev nqus dej; qee qhov tuaj yeem tsim dua tshiab thiab rov siv dua los ntawm cua sov.
Silica Gel (Silica Dioxide, SiO₂)
Cov qauv microporous heev, tsis yog - tshuaj lom, tsis muaj ntxhiab, thiab tshuaj lom neeg ruaj khov. Tsuas yog FDA- pom zoo desiccant uas tuaj yeem tiv tauj ncaj qha rau zaub mov thiab tshuaj.
Kev nqus dej noo yog kwv yees li 20% -37%, nrog rau cov teebmeem tseem ceeb hauv ib puag ncig nrog cov av noo siab tshaj 30%.
Reusable los ntawm cua sov kom desorb noo noo, dav siv nyob rau hauv electronics, kws, thiab zaub mov industries.
Montmorillonite (Bentonite)
Ntuj ntxhia raw khoom, ib puag ncig tus phooj ywg, tsis yog - lom, thiab biodegradable.
Zoo adsorption kev ua tau zoo ntawm chav tsev kub thiab cov av noo ib txwm, haum rau cov khoom noj khoom haus, cov khoom siv kho qhov muag, cov khoom siv tub rog, thiab lwm yam uas muaj kev nyab xeeb siab.
Kev nqus dej noo yog kwv yees li 18% -25%, qis dua calcium chloride, tab sis muaj kev nyab xeeb thiab tsis muaj kuab paug.
Molecular sieves
Synthetically synthesized crystalline aluminosilicates nrog ib tug tsis tu ncua pore qauv, muaj peev xwm ntawm selectively adsorbing molecules ntawm tej qhov ntau thiab tsawg.
Lawv tuav cov dej noo zoo txawm tias nyob rau hauv ultra- qhov chaw tsis muaj av noo thiab feem ntau yog siv rau hauv siab -kawg daim ntawv thov xws li cov cuab yeej precision thiab cov chaw soj nstuam.
Lawv yog cov cua sov- rov tsim dua thiab muaj lub neej ua haujlwm ntev, tab sis kuj kim heev.
Fiber ntau desiccants
Siv cov nroj tsuag ntuj fibers ua cov khoom siv hauv paus, lawv tsis rov qab los tom qab nqus dej, yog ib puag ncig zoo, thiab biodegradable.
Lawv tuaj yeem nqus tau li 100% ntawm lawv tus kheej qhov hnyav hauv cov dej noo, haum rau kev tiv thaiv cov khaub ncaws, khoom tawv, hnab, thiab lwm yam khoom siv niaj hnub.