Kodi pali kusiyana kotani pakati pa granular urea yayikulu ndi yaying'ono?

Monga feteleza omwe amagwiritsidwa ntchito kwambiri, urea wakhala akukhudzidwa ndi kukula kwake. Pakalipano, urea pamsika imagawidwa mumagulu akuluakulu ndi tinthu tating'onoting'ono. Nthawi zambiri, urea wokhala ndi tinthu tating'onoting'ono toposa 2mm amatchedwa urea yayikulu granular. Kusiyana kwa tinthu tating'ono ndi chifukwa cha kusiyana kwa granulation ndondomeko ndi zipangizo pambuyo kupanga urea mu fakitale. Kodi pali kusiyana kotani pakati pa granular urea ndi granular urea yaing'ono?

Choyamba, kufanana pakati pa granular urea yayikulu ndi yaying'ono ndikuti chogwiritsira ntchito ndi molekyulu ya urea yosungunuka m'madzi yomwe imakhala ndi nayitrogeni 46%. Kuchokera pamalingaliro afizikiki, kusiyana kokha ndi kukula kwa tinthu. Large-grained urea ali otsika fumbi okhutira, mkulu compressive mphamvu, fluidity zabwino, akhoza kunyamulidwa zambiri, si zophweka kuswa ndi agglomerate, ndi oyenera makina umuna.

Kachiwiri, potengera umuna, pamwamba pa tinthu tating'onoting'ono ta urea ndi wamkulu, malo olumikizana ndi madzi ndi dothi ndi okulirapo mukatha kugwiritsa ntchito, ndipo kusungunuka ndi kutulutsa kumathamanga kwambiri. Kusungunuka ndi kutulutsidwa kwa tinthu tating'ono ta urea m'nthaka kumachepera pang'ono. Nthawi zambiri, pali kusiyana kochepa pakuchita bwino kwa feteleza pakati pa ziwirizi.

Kusiyanaku kumawonekera mu njira yogwiritsira ntchito. Mwachitsanzo, popanga pamwamba, mphamvu ya feteleza ya urea yaying'ono imathamanga pang'ono kuposa ya urea yayikulu granular. Pakuwona kutayika, kutayika kwa urea yayikulu granular ndi yocheperako poyerekeza ndi yaing'ono granular urea, ndipo zomwe zili mu diurea mu urea yayikulu granular ndizotsika, zomwe zimapindulitsa mbewu.

Kumbali ina, pa kuyamwa ndi kugwiritsa ntchito mbewu, urea ndi molekyulu ya nayitrogeni, yomwe imatengedwa mwachindunji ndi mbewu pang'onopang'ono, ndipo imatha kuyamwa mochuluka kwambiri ikasinthidwa kukhala ammonium nitrogen m'nthaka. Chifukwa chake, mosasamala kanthu za kukula kwa urea, kukongoletsa pamwamba ndi masiku angapo m'mbuyomu kuposa ammonium bicarbonate. Kuonjezera apo, kukula kwa tinthu tating'onoting'ono ta granular urea ndi kofanana ndi diammonium phosphate, kotero kuti granular urea ikhoza kusakanikirana ndi diammonium phosphate monga feteleza wapansi, ndipo ndibwino kuti musagwiritse ntchito urea waukulu wa granular pa kuvala pamwamba.

Kusungunuka kwa granular urea yayikulu ndipang'onopang'ono, komwe kuli koyenera feteleza wapansi, osati kuthirira ndi kuthira feteleza. Tinthu tating'onoting'ono tating'ono tating'onoting'ono timafanana ndi diammonium phosphate ndipo itha kugwiritsidwa ntchito ngati feteleza wosakanikirana. Tikumbukenso kuti granular urea lalikulu sangathe kusakaniza ammonium nitrate, sodium nitrate, ammonium bicarbonate ndi feteleza ena hygroscopic.

Kupyolera muyeso la feteleza la urea lalikulu la granular ndi urea wamba wamba pa thonje, zotsatira za kupanga urea waukulu wa granular pa thonje zimasonyeza kuti makhalidwe a zachuma, zokolola ndi mtengo wamtengo wapatali wa urea waukulu wa granular ndi wabwino kuposa urea yaying'ono, yomwe ingalimbikitse khola kukula kwa thonje ndi kupewa Kukalamba msanga wa thonje kumachepetsa kukhetsa kwa thonje masamba.