A wane yanayi ne diesel na bazara ke daskare?
Abubuwa
Mene ne kakin zuma, kuma me ya sa yake da kyau ga motar diesel?
Diesel waxes, ko da yaushe da ake samu a cikin man dizal, su ne dogon sarkar hydrocarbons cewa yakan yi crystallize a low yanayin zafi. Waɗannan platelets crystalline suna toshe masu tacewa a cikin sarƙoƙin "kakin zuma" na gaskiya. Haɗaɗɗen dogon sarkar hydrocarbons suna ƙaruwa sosai da ɗanɗanon man dizal, wanda ba shi da kyau ga injin da famfon mai. Kasancewar ruwa a cikin adadi mai yawa yana haifar da wata matsala - samuwar lu'ulu'u na kankara. Wannan yana faruwa a wurin daskarewa na man dizal. Matsalar ita ce: a) ruwa ba ya narke a cikin kowane ruwa hydrocarbons; b) waɗannan lu'ulu'u a wasu yanayin zafi sun riga sun zama wani abu mai ƙarfi, sabanin paraffin, wanda har yanzu ruwa ne.
A cikin duka biyun, man dizal zai sake gudana ne kawai lokacin da ya yi zafi sama da zafin jiki na crystallization.
Matsalar, kamar yadda ake gani, za a iya warware ta ta hanyar ƙara wani adadin (daga 7 zuwa 10%) na biodiesel zuwa man dizal. Sai dai na farko man fetur na biodiesel yana da tsada, na biyu kuma, wani lokaci wannan yakan zama wani abu mai kauri wanda ke haifar da kumfa mai tsaftataccen man dizal wanda ba ya dauke da sinadaran kara kuzari.
Ba kamar paraffins (lokacin da lu'ulu'u na ƙwayoyin haɗe-haɗe suna watse tare da haɓakar zafin jiki), cakuda man dizal tare da biodiesel ya zama gajimare kuma ba ya gaggawar komawa zuwa mai na al'ada.
Dakatar da turbid, wanda ke faruwa a lokacin aikin kakin zuma, yana toshe masu tacewa, wanda ya cika aikin famfon mai. A sakamakon haka, gibi a cikin sassa masu motsi sun ɓace kuma busassun matakai sun fara. Tun da yanayin zafi da matsi suna da yawa, ɓangarorin ƙarfe da aka cire da sauri suna juyewa zuwa foda na ƙarfe, wanda da farko yana coagulate sannan kuma sinters. Kuma famfo ya ƙare.
Don tabbatar da cewa wannan bai faru ba, wajibi ne a yi amfani da abubuwan da suka dace don haɗuwa da biodiesel. Bugu da ƙari, kada a sami ruwa a cikin man diesel, wanda kuma ya toshe masu tacewa.
Shin akwai bambanci tsakanin "dizal na hunturu" da "dizal na hunturu"?
Akwai. A cikin akwati na farko, man dizal yana haɗe da kananzir, a cikin akwati na biyu, an ƙara antigel zuwa man dizal na yau da kullun. Yawancin gidajen mai suna ba da dizal na hunturu maimakon diesel na hunturu saboda yana da arha. Wasu sun fi hikima kuma suna ba da nau'ikan biyu don barin masu siye su yanke shawara da kansu. Don sabbin ababen hawa, an fi son man dizal na hunturu mai ɗauke da abubuwan da suka dace.
Kuma menene game da biodiesel? Kasancewarsa yana buƙatar canji a fasahar sarrafa man fetur, tun da maki gelation ya bambanta da juna. Saboda haka, biodiesel zai amsa daban-daban tare da tsarin tsarin man fetur. Biodiesel, kamar dizal, gels a cikin yanayin sanyi, amma ainihin zafin jiki na gel zai dogara ne akan abin da aka yi daga biodiesel. Man dizal zai juya ya zama gel a daidai yanayin zafin da ake farawa da kakin mai ko kitsen da aka yi amfani da shi don yin man.
Daskarewa wurin man dizal na rani
Yana da wahala a ƙididdige wannan kewayon daidai saboda yawancin masu canji suna shiga cikin wasa. Koyaya, ana san maɓalli maɓalli biyu:
- Wurin girgije shine lokacin da kakin zuma ke fara fadowa daga cikin mai.
- Wurin da ake zubawa wanda dizal ke da gel da yawa a ciki har ya daina zubowa. Wannan batu yawanci yana ɗan ƙasa da wurin girgijen mai.
Don man dizal na rani, zafin jiki na farko kusan yayi daidai da kewayon -4 ... -6ºC, kuma na biyu -10 ... -12ºC (zaton yawan zafin jiki na waje). Mafi daidai, ana ƙayyade waɗannan yanayin zafi a cikin dakunan gwaje-gwaje, inda ake la'akari da wasu halaye na zahiri da na inji na man fetur.
