Qhuav cawv - lub keeb kwm ntawm lub rov tshwm sim thiab daim ntawv thov ntawm

Qhuav cawv - nws yog ib qho nyuaj, tsis muab pa luam yeeb roj uas yog ncaj qha mus rau alcohols muaj tsis muaj dab tsi ua li cas. Qhov no tshuaj yog ua feem ntau nyob rau hauv daim ntawv ntawm cov loj pellets, thaum combustion ntawm ib ntsiav tshuaj yog prmerno 12-15 feeb. Qhuav cawv muaj ob yam: hexamethylenetetramine (kuj hu ua hexamine) thiab ib tug me me npaum li cas ntawm ciab. Muaj qhov no zoo ntawm cov roj vim lub zog Aleksandra Mihaylovicha Butlerova - tus poj Lavxias teb sab chemist, uas tsis tau tsuas tau tsim ib tug xov tooj ntawm cov organic tebchaw, tab sis kuj tsim ib tug kev tshawb xav ntawm cov qauv ntawm cov sib txawv tshuaj. Nws yog qhov no kawm nyob rau hauv 1859 tau txais ib tug tshiab tshuaj los ntawm cov tshuaj tiv thaiv ntawm formaldehyde nrog ib tug aqueous ammonia tshuaj, uas tom qab ua lub npe hu ua hexamine.

Ib tug interesting tseeb yog tias nyob rau hauv Russia methenamine kom txog thaum Lub rau hli ntuj 1, 2010 twb muaj kev koom siv nyob rau hauv lub lag luam ua noj: nws yog siv raws li ib tug preservative rau tej ntses thiab caviar, thiab tau sau npe raws li ib tug neeg sawv cev E239. Tom qab no preservative pom tau hais tias tej kev kho, methenamine vim hais tias tus sis ntawm cov acid yog hloov dua siab tshiab rau formaldehyde, uas provokes tus emergence thiab kev loj hlob ntawm cancer hlav, uas yog, nyob rau hauv qhov tseeb, yog ib tug carcinogen. Yog li ntawd methenamine tam sim no siv mas rau zus tau tej cov khoom uas pab xws li qhuav roj.

Txawm tias muaj tseeb hais tias cov neeg niaj hnub no yog surrounded los ntawm tag nrho cov kev pab cuam ntawm kev vam meej, nws yog cov roj pom nws muaj ntau daim ntaub ntawv. Qhuav cawv yog siv rau ua noj ua haus thiab cua sov cov khoom noj nyob rau hauv lub teb tej yam kev mob, uas yog tshwj xeeb tshaj yog ib qho tseem ceeb rau tej qhov chaw nyob qhov twg koj yuav nrhiav tsis tau ib tug pob txha roj (roob, tus mob rocky av, steppe, thiab lwm yam). Qhov no roj yog tseem teem ntawm ib tug neeg rations ntawm cov tub rog nyob rau hauv yuav luag tag nrho cov tub rog ntawm lub ntiaj teb no. Rau kindling hluav taws kub hauv ntub huab cua muaj peev xwm kuj yuav siv tau qhuav dej cawv. Tus nqi ntawm no roj (uas yog tshwj xeeb tshaj yog zoo) yog tsis tshua muaj, lub ntim ntawm cov ntsiav tshuaj yuav yuav rau 25 rubles. Qhov no yog ib tug zoo heev kev xaiv vim hais tias feem ntau kim qhuav roj yuav raug nqi txog 150 rubles. Ua noj qhuav dej cawv yog ib qhov nyuaj (rau ua noj ua haus ib tug tag nrho noj mov yuav siv sij hawm ib tug ntev lub sij hawm), tab sis rau cov warm-up, nws haum txig rau Piv txwv li, nws yog ua tau rau thaum tshav kub kub ib hub ntawm zaub mov kaus poom los yog rhaub ib khob dej tshuaj yej. Qhov zoo tshaj plaws zes qhuav roj rau ib tug tshwj xeeb hlau puag.

Qhov zoo ntawm no hom ntawm cov roj yog heev ntshiab: ntsiav tshuaj yog lub teeb thiab compact, tsis nyob ntau qhov chaw, lawv yuav nqa nrog lawv txawm taug kev, tsis zoo li, hais tias, petrol los yog gas burners. Ntsiav tshuaj yog heev yooj yim mus siv, yog li ntawd lawv muaj ib tug ncaj sab ntau yam ntawm daim ntawv sau npe. Tab sis qhuav haus dej haus cawv muaj ib tug xov tooj ntawm tej yam tsis zoo qualities: cov nplaim taws yog heev rau lub cua, li ntawd, tej zaum koj yuav xav tau ib tug tshwj xeeb screen. Ntxiv mus, xws roj thaum ntub dej pib haus luam yeeb, sparks thiab tso ib tug unpleasant tsw. Tab sis cov no shortcomings yog tsis raws li tseem ceeb, tshwj xeeb tshaj yog muab piv nrog rau cov zoo muaj los ntawm kev siv ntawm qhuav roj.