UREA rau Tsheb Chaw Tsim Tshuaj

Raws li cov khoom tseem ceeb rau cov tsheb thauj khoom hnyav thiab cov neeg caij tsheb, lub ntsiab lus tseem ceeb yog los xyuas kom meej qhov purity ntawm cov khoom siv raw. Peb cov txheej txheem ntau lawm yog muab los ntawm purification ntawm industrial urea.

Lub tsheb urea yog hais txog cov tshuaj aqueous urea nrog urea concentration ntawm 32.5% thiab dej ultrapure ua cov kuab tshuaj. Cov ntaub ntawv raw peb siv yog urea crystals thiab ultrapure dej.

Urea rau cov chaw tsim khoom tsheb yog siv los pab txo qis emissions los ntawm diesel xyaw. Thaum cov roj diesel raug hlawv hauv lub cav, nws tsim cov pa phem xws li nitrogen oxide (NOx) uas tuaj yeem tsim kev puas tsuaj rau ib puag ncig thiab tib neeg kev noj qab haus huv. Urea tuaj yeem muab ntxiv rau hauv qhov tso pa tawm ntawm lub tshuab hluav taws xob, qhov twg nws cuam tshuam nrog NOx los ua kom tsis muaj nitrogen thiab dej vapor. Cov txheej txheem no, hu ua selective catalytic reduction (SCR), pab txo qis cov pa phem los ntawm cov tsheb diesel thiab txhim kho huab cua zoo.

Lwm qhov txiaj ntsig ntawm urea rau cov chaw tsim tsheb yog tias nws tuaj yeem pab txhim kho roj kev lag luam. Thaum urea ntxiv rau hauv cov pa tawm, nws tso cai rau lub cav khiav kom zoo dua qub, uas tuaj yeem txuag tau roj thiab txo nqi rau cov tswv tsheb. Qhov no yog qhov tseem ceeb tshwj xeeb rau cov tsheb hnyav xws li tsheb thauj khoom thiab tsheb npav uas siv roj ntau.

Urea rau cov chaw tsim khoom tsheb kuj tuaj yeem siv los ua cov khoom siv raw hauv kev tsim cov yas, cov nplaum, thiab lwm yam khoom siv hauv kev lag luam tsheb. Cov khoom siv ntau yam no muaj ntau yam kev siv thiab yog ib qho tseem ceeb ntawm ntau yam khoom uas peb siv txhua hnub.