Flash-point

Flash - ukutshiswa lwephanyazo umxube lomoya kunye umphunga nezinto ezinokutsha, ekhatshwa ukukhanya mfutshane oqaqambileyo. omlilo esitalini nale. Flashpoint - kwamaqondo obushushu kwezinto incitshisiwe, apho kumphezulu zabo zakha iperi ezibengezelayo xa yintlantsi, idangatye okanye iqumrhu zigqengezelayo.

Ukwazi ukuba idanyaze kumaqondo obushushu aphantsi okuye ulwelo enxulumene kudidi olunokutsha. flashpoint benani izinto ezinjalo crucibles evaliweyo + 61 ° C, vula - + 66 ° C. Ezinye izinto ezinakho phemba ngokuzenzekelayo, ukufikelela okufana iqondo lobushushu ucinezelo.

Ukumiselwa yengcinezelo lo mphunga ifumile kunokwenzeka ukuba naluphi na ulwelo olunokutsha. It kwandisa ngokomlinganiselo kwandisa lobushushu mbandela. Yakuba le flash point ifikelela wokugxeka (ubuninzi) isalathiso, yaye kwenzeka ukugcina komlilo.

Noko ke, ukuqala lizama "umphunga - ulwelo" uya kufuna ixesha elithile, nto leyo ngokomlinganiselo izinga ukubunjwa umphunga. omlilo Esitalini kungafezekiswa, lafikelela kwinqanaba elithile (kuba ngamnye iziyobisi) lobushushu ucinezelo, ngokuba ubushushu yokutsha usoloko ngaphezu flash ngongoma.

amaqondo obushushu ngqo ukutshintsha apho izinto flash nobunzima ezithile. Ngoko ke, indawo flash uthathwa ukuba iqondo lobushushu emithanjeni reaction, apho le flash uyabonakala. Kuxhomekeka ngqo kwiimeko lobushushu ezi ngaphakathi isitya wotshintshiselwano sobushushu umsebenzi wayo zokuphosa kwindalo esingqongileyo, umthamo ulwelo ngesitya.

Izalathisi kuvumela eksperimenti ukubala kuvumelekile ukuba iqondo lobushushu yezothutho kunye nokugcinwa kwezinto ezinokutsha. Kulinganiswa lobushushu flash e crucibles ezivaliweyo, ngokuqhelekileyo yi Pensky-Martens. COC bucaciswe ngokomfuniselo.

ulwelo ingakumbi yingozi esikwaziyo ezibengezelayo kubushushu ngezantsi -18 ° C crucibles closed ngezantsi - 13 ° C - evulekileyo. Ukuqhubeka kuzakuthathwa ulwelo ezinobungozi leyo kukhazimla kubushushu of + 23 ° C crucibles lavalwa ukuba + 27 ° C evulekileyo. Izalathisi amaqondo ulwelo eziyingozi ukuya ku + 60 ° C kwanokuhlanganisa crucibles lavalwa ukuba + 66 ° C ebandakanya - xa ivuliwe.

Flash umahluko lobushushu, le ucinezelo kunye ukutshiswa ziyohluka kakhulu, yaye ngamnye ubutyebi ngamnye. Flash point of diesel, umzekelo - + hayi ngaphezulu kwe 70 ° C. kwithempritsha yayo omlilo - + 1100 ° C. Flashpoint - evela ° + 100 ukuya + 119 ° C. Kodwa flash iqondo lobushushu ipetroli, ngenxa okungazinzi eziphakamileyo kakhulu, kukuba + 40 ° C, yaye maxa wambi ngaphantsi. kwithempritsha yayo ucinezelo - + 300 ° C. Izalathisi ipetroli, ngokubanzi kakhulu. Kufuneka kuthathwe medium, ekubeni kukho iintlobo ezahlukeneyo zepetroli (indlela (ehlotyeni, ebusika), emoyeni) ezineempawu kakhulu ezahlukeneyo, kwaye ngokufanelekileyo, amaqondo ezahlukeneyo flash ucinezelo yokutsha.

Omlilo - inkqubo sikhatshwa kwinkululeko isixa esikhulu ubushushu kunye amadlozi uphawu zokukhanya (chweba), amandla kwiqondo elithile ubutyebi neoksijini ukufikelela ngasinye kuyo okanye ezinye iiarhente (isalfure, bromine umphunga njalo njalo.).

Eyona esiyingozi kuqhuma, lubonakala lwephanyazo imichiza reaction ukumkhulula amandla kakhulu, yaye nokuxhasa umsebenzi ngoomatshini. Umlilo kwi dubulo utshisa eemitha 3,000 ngomzuzwana. Omlilo of umxube ngeqondo loo ebizwa detonation. Ngaba sisiphumo detonation amaza badla umonakalo ezibalulekileyo kunye neengozi.