Feem ntau cov chiv extrusion granulators suav nrog ob-yob extrusion granulators thiab tiaj (ntiv nplhaib) tuag extrusion granulators.Thaum lub sij hawm ua cov chiv chiv, cov granulators tuaj yeem nce cov ntsiab lus nitrogen raws li kev xav tau, thiab qee qhov siv urea los ua cov ntsiab lus ntawm nitrogen, uas tuaj yeem nqus tau noo noo hauv huab cua thiab ua rau cov khoom siv chiv ua ke.Yog li ntawd, nws yog feem ntau hais tias ob-yob extrusion granulator yog ib tug qhuav hmoov granulator, uas muaj ib tug zoo dua ntawm kev ua granules rau raw cov ntaub ntawv uas muaj ib tug noo noo cov ntsiab lus ntawm tsawg tshaj li 10%.Rau cov ntaub ntawv ntub, tsim nyog los tiv thaiv hardening tshuab yuav tsum tau nqa tawm.Rau kev khaws cia ntawm cov chiv granules uas muaj noo noo raws li raw cov ntaub ntawv ntawm compound chiv, nws yog ib qhov tsim nyog yuav tsum tsis txhob hardening.
Lub hauv paus ntsiab lus thiab dej yuav tsum tau ntawm compound fertilizer extrusion granulator ua granules
Lub hauv paus ntsiab lus ua haujlwm ntawm extrusion granulator feem ntau yog cov hmoov qhuav ua cov khoom siv tseem ceeb.Thaum cov khoom nkig yog nyem, ib feem ntawm cov khoom yog crushed, thiab cov hmoov zoo ua rau lub qhov khoob ntawm cov khoom.Nyob rau hauv cov ntaub ntawv no, yog hais tias cov tshuaj dawb bonds nyob rau hauv lub tshiab generated nto tsis tau sai saturated nrog atoms los yog molecules los ntawm ib puag ncig cua, lub tshiab generated nto tuaj rau hauv kev sib cuag nrog ib leeg thiab tsim muaj zog recombination bonds.Rau lub extrusion ntawm cov menyuam, cov menyuam daim tawv nqaij muaj ib tug spherical opposite zawj, uas yog extruded mus rau hauv ib tug kheej kheej, thiab cov hais extruded los ntawm lub tiaj tus (ntiv nplhaib) tuag yog columnar.Extrusion granulation yuav tsum muaj cov ntsiab lus tsis tshua muaj noo noo.Yog tias cov dej noo siab dhau lawm, nws yog ib qho tsim nyog yuav tsum tau ntxiv lub tshuab ziab khaub ncaws rau kev siv tshuab.
Kev daws teeb meem tsis zoo ntawm nitrogen qhov chaw noo noo nqus hom hauv cov txheej txheem chiv granulation
Lub crux ntawm compaction nyob rau hauv lub compound fertilizer granulation txheej txheem yog feem ntau cov dej siab cov ntsiab lus tshwm sim los ntawm nitrogen qhov chaw urea absorbing dej.Mechanistically hais lus, qhov pib thiab ceev ntawm "slow burning" ntawm compound chiv tsis nce nrog nce ntawm ammonium nitrate thiab poov tshuaj chloride cov ntsiab lus.Piv txwv li, ib qho kev sib xyaw uas muaj 80% ammonium nitrate thiab 20% potassium chloride tsis hlawv, tab sis muaj cov sib tov ntawm 30% diatomaceous ntiaj teb, 55% ammonium nitrate, thiab 15% poov tshuaj chloride ua kom muaj zog "kub qeeb".
Compound fertilizer particles nrog urea raws li nitrogen qhov chaw muaj siab hygroscopicity thiab tsis tshua muaj softening point;biuret thiab adducts tau yooj yim tsim thaum kub siab;urea yuav raug hydrolyzed thaum kub siab, ua rau poob ntawm ammonia.
Qhov no yog qhov tsim nyog los daws cov ntsiab lus dej siab uas tshwm sim los ntawm nitrogen qhov nqus dej.Txo nitrogen qhov chaw Thaum calcium superphosphate tshwm sim, dej-soluble phosphorus yuav degraded;Thaum tsim urea-hom calcium superphosphate compound chiv, ntau superphosphate yuav tsum tau pretreated, xws li ammoniation, uas yuav tshem tawm adducts Tsim, los yog ntxiv calcium magnesium phosphorus rau neutralize cov dawb acid ntawm superphosphate, thiab hloov cov dej dawb rau hauv cov dej siv lead ua, txhim kho cov khoom. zoo, lossis ntxiv ammonium sulfate, uas tuaj yeem txo cov dej noo ntawm cov khoom tiav thiab ntxiv dag zog rau cov khoom tiav;Thaum muaj cov tshuaj chlorine Thaum ammonium hloov dua siab tshiab, urea thiab chlorine tsim ib tug adduct, uas ua rau kom lub crystallization, uas ua rau lub rewarming chiv yooj yim ua agglomeration ntawm cov khoom tiav thaum lub sij hawm cia;Yog li ntawd, lub compound fertilizer nrog urea raws li nitrogen qhov chaw yuav tsum tau them tshwj xeeb mloog mus rau qhuav thiab txias txheej txheem.Piv txwv li, qhov kub ntawm qhov ziab yuav tsum tsis txhob siab dhau, lub sij hawm ziab yuav tsum tsis txhob ntev dhau, cov ntsiab lus noo noo tau teev nyob rau hauv tus qauv zoo yuav tsum tau ntsib, lub melting tshwm sim thaum lub sij hawm ntau lawm yuav tsum tau zam, thiab tsis muaj caking yuav tsum tau khaws cia. thaum lub sijhawm khaws cia.
Cov saum toj no yog vim li cas rau qhov siab noo noo nyob rau hauv cov txheej txheem granulation ntawm compound fertilizer granulator, uas ua rau compaction.Txoj hauv kev tseem ceeb kom tsis txhob muaj kev sib tsoo yog kev siv lub tshuab ziab khaub ncaws.Pretreatment ntawm cov ntaub ntawv, ntxiv cov ntsiab lus thiab lwm txoj kev, thiaj li kom paub qhov kev ua thiab tsis-destructive preservation ntawm compound fertilizer hais.
Post lub sij hawm: Dec-10-2022
