Silica gel imhando yeanoshanda zvakanyanya adsorption zvinhu.
Icho chinhu chinonzi amorphous uye chimiro chayo chemakemikari ndeye mSiO2.nH2O. Inosangana neChinese kemikari yakajairwa HG/T2765-2005. Iyo desiccant raw material yakagamuchirwa neFDA iyo inogona kutarisana zvakananga nechikafu nemishonga. Silica gel ine simba rakasimba rehygroscopic, yakasimba adsorption performance, kunyange kana silica gel desiccant yakanyudzwa zvakakwana mumvura, haizopfavi kana kunyorovesa. Iyo ine hunhu hwekusina-chepfu, isinganakidze, isingaore uye isingasvibise, saka inogona kutarisana zvakananga nechero chinhu. Izvo zvigadzirwa zvinoda kugadzirirwa kugadzirwa kwesilica gel ndezvi: sodium silicate (paucine, girazi remvura), sulfuric acid.
Chekutanga, iyo alkali neasidhi zvinogadzirwa pachine nguva, uye ipapo iyo yakasimba sodium silicate inonyungudutswa pakupisa kwakanyanya uye kusefa kuti igadzirire kumwe kusanganiswa kwemvura, uye ipapo iyo sulfuric acid inogadzirirwa kune kumwe kusanganiswa kwemvura, iyo sulfuric. asidhi iri 20%.
Chechipiri, danho rechipiri nderekugadzira glue (gel granulation), danho iri ndiro rinonyanya kukosha, pre-modulated bubble lye uye sulfuric acid solution pasi pemamiriro ezvinhu chaiwo, kuitira kuti iite soluble gel solution, mushure mokusvika pakusangana kwakakodzera. kuva gel particles. Chimiro uye saizi yezvimedu zvinogona kutsanangurwa zvizere zvinoenderana nezvinodiwa nemushandisi uye kugona kwekugadzira. Iyo yakajairika nzira yegel granulation ndeyemhepo granulation, uye iyo acid-base reshiyo, concentration, tembiricha uye gel granulation nguva inoshandiswa muiyo gel granulation maitiro ndiwo chaiwo tekinoroji paramita.
Chechitatu, gel rekuchembera rinoda kupfuura nepakati peimwe nguva uye tembiricha, pamwe nePH kukosha kuzera, zvichiita kuti gel skeleton ive yakasimba, glue condensation pakati pezvimedu panguva yekuchembera kuumba Si-O-Si zvisungo, kuwedzera. simba re skeleton, zvimedu zviri pedyo kune mumwe nemumwe, kuderedza nzvimbo muhutano hwegridhi, uye mvura iri mairi inosvinwa kunze.
Kunhonga, kugeza, kugezesa guruu Kunhonga, kugeza, kugeza guruu zvakare inhanho yakakosha mukuita, nekuti Na2SO4 inoumbwa negeri regranular inogezwa. Dzora anion imwe neimwe mukati mehuwandu hunodiwa nemaitiro. Zvinogona kutaurwa kuti chikamu chikuru chepore maitiro eiyo yakapedzwa silica gel inotarirwa nekuchembera kwekugezesa kwerubha, uye dhigirii rekuchembera rekuita uku kunoenderana nekushanda mukunhonga, kugeza, uye kugeza rubber process.
Chechishanu, kuomeswa, iyo yakagadzirwa hydrogel (mushure mekugeza) muimba yekuomeswa, mumamiriro ezvinhu chaiwo kuderedza mvura yejeri pachayo kuoma kusvika kune inodiwa. Kukwirisa tembiricha yekuomesa, kunowedzera mwero weprimary particle aggregation uye yakakura yekuvhura.
Nhanhatu, yekuongorora, muchina wekusarudza bhora uchaomeswa mushure mesilicone kuburikidza nechidzitiro cheapertures akasiyana zvinoenderana neimwe particle size screening out, uye panguva imwecheteyo ichatyoka silica gel screening out.
Zvinomwe, kunhonga glue: iyo silica gel muheterochromatic bhora, tsvina inotora uye wozoshandisa pepa remubatanidzwa zvinoenderana nezvinodiwa zvekurongedza, mushure mekuisa chisimbiso. Mushure mematanho ari pamusoro, chigadzirwa chesilicone chinogadzirwa.
Nguva yekutumira: Nov-14-2023
