Kumvetsetsa Makina Oyeretsera mu Makampani Opanga Mankhwala
Kusungunula ndi chimodzi mwa ntchito zofunika kwambiri mumakampani opanga mankhwala. Kuyambira kuyeretsa zosungunulira mu labotale mpaka kulekanitsa magawo a mafuta pa sikelo ya fakitale yoyeretsera, kusungunula kumapanga msana wa njira zambiri zopangira. Makina osungunula—kaya mayunitsi osavuta kapena mizati ikuluikulu yosungunula—amalekanitsa zosakaniza kutengera kusiyana kwa kusinthasintha (kusasinthasintha kwa nthunzi) kwa zigawo zawo. Nkhaniyi ikufotokoza mfundo zoyambira, zigawo zazikulu, mitundu ya kusungunula, magawo ogwirira ntchito, komanso zovuta ndi chitetezo chakugwiritsa ntchito makina osungunula.
Mfundo Zofunikira za Distillation
Kwenikweni, kusungunuka kwa madzi kumagwiritsa ntchito mfundo yakuti chinthu chilichonse chili ndi malo osiyana owira ndi mphamvu ya nthunzi. Pamene chisakanizo chikutenthedwa, zigawo zosinthasintha zimapita ku gawo la nthunzi. Nthunzi iyi imaziziritsidwa mu condenser mpaka itabwerera ku madzi (distillate). Pakadali pano, madzi otsala mu chotengera chotenthetsera kapena pansi pa mzati nthawi zambiri amakhala ndi zigawo zambiri zokhala ndi malo ambiri owira.
Komabe, ndikofunikira kumvetsetsa kuti kusungunuka sikungokhala "kutenthetsa ndi kuziziritsa." Pa chisakanizo china, pali vapor-liquid equilibrium (VLE), zomwe zimatsimikizira kapangidwe ka nthunzi ndi madzi pa kutentha ndi kupanikizika kwina. Mu distillation column, njira zotulutsira nthunzi ndi kusungunuka kwa madzi zimachitika mobwerezabwereza pazigawo zosiyanasiyana, zomwe zimapangitsa kuti pakhale kusiyana kwakukulu kuposa distillation imodzi.
Zigawo Zazikulu za Makina Oyeretsera/Chigawo
Mu mafakitale, "makina oyeretsera" nthawi zambiri amatanthauza phukusi la zida zomwe zimagwira ntchito ngati dongosolo. Zigawo zake zazikulu ndi izi:
1. Chotenthetsera (chotenthetsera cha m'munsi)
Chotenthetsera madzi chimapatsa kutentha kuti chitenthe madzi ena pansi pa mzati. Nthunzi yomwe imabwera imakwera pamwamba pa mzati ndipo imagwira ntchito ngati "mota" yolekanitsira. Mitundu yodziwika bwino ya zotenthetsera madzi ndi monga zotenthetsera madzi a kettle, zotenthetsera madzi a thermosiphon, ndi zotenthetsera madzi zomwe zimayendetsedwa ndi mphamvu.
2. Mzere wothira madzi
Mzati ndi chipangizo chachikulu cholekanitsa. Uli ndi chipangizo cholumikizirana ndi nthunzi ndi madzi monga thireyi (fyuluta/mbale) kapena chopakira. Cholinga chake ndikupanga malo akuluakulu olumikizirana kuti nthunzi ndi madzi pang'onopang'ono zifike pamlingo woyenera.
3. Thireyi kapena Kulongedza
– Mathireyi (monga mathireyi otsekera, mathireyi a ma valve, zipewa za thovu) ndi oyenera kugwiritsidwa ntchito m'njira zosiyanasiyana ndipo ndi osavuta kuwayang'anira, koma nthawi zambiri amakhala ndi kutsika kwakukulu kwa kuthamanga kwa magazi.
– Kupaka (mwachisawawa kapena mokonzedwa) nthawi zambiri kumasankhidwa poyeretsera vacuum kapena machitidwe omwe amakhudzidwa ndi kutsika kwa kupanikizika, chifukwa kutsika kwa kupanikizika kumakhala kotsika.
4. Chokonzetsera
Choziziritsira chimaziziritsa nthunzi kuchokera pamwamba pa mzati kupita ku madzi. Chikhoza kukhala choziziritsira chonse (chomwe chimaziziritsa nthunzi yonse) kapena choziziritsira pang'ono (chopanga chisakanizo cha nthunzi ndi madzi).
5. Drum ya Reflux ndi dongosolo la Reflux
Distillate yochokera ku condenser imasonkhanitsidwa, kenako nkubwezeretsedwa pang'ono pamwamba pa mzere ngati reflux. Reflux ndi yofunika kwambiri chifukwa imawonjezera kuyera kwa chinthu chapamwamba mwa "kutsuka" nthunzi yomwe ikukwera ndi madzi omwe akutsika.
6. Mapampu, mapaipi, zowongolera zida
Machitidwe oyeretsera zinthu amadalira kuwongolera kuchuluka kwa madzi, kutentha, kuthamanga, ndi kuchuluka kwa madzi. Kuwongolera kokhazikika kumatsimikiza mtundu wa chinthu ndi kugwiritsa ntchito bwino mphamvu.
Mitundu ya Distillation mu Makampani Amankhwala
Mitundu yosiyanasiyana ya distillation idapangidwa kuti igwirizane ndi makhalidwe osiyanasiyana a zosakaniza:
1. Kusakaniza kosavuta
Kawirikawiri pakakhala kusiyana kwakukulu kwa kutentha kapena kugawikana kwakukulu. Kawirikawiri pakakhala kutsika kwa kutentha.
2. Kusungunuka kwa magawo
Kugwiritsa ntchito mizati yokhala ndi magawo angapo olekanitsa. Iyi ndi njira yodziwika kwambiri m'mafakitale, mwachitsanzo, kulekanitsa benzene-toluene kapena kugawa kwa hydrocarbon.
3. Kuyenga ndi vacuum
Kuchepetsa kuthamanga kwa ntchito kuti muchepetse kutentha kwa madzi ndi koyenera kwa zinthu zomwe zimakhala ndi kutentha kwambiri kapena zomwe zimawola mosavuta kutentha kwambiri. Zitsanzo: magawo amafuta olemera, kuyeretsa ma monomers ena.
4. Kusungunuka kwa nthunzi
Nthunzi ya madzi imabayidwa kuti ithandize kuwononga zinthu zachilengedwe kutentha kochepa. Imagwiritsidwa ntchito kwambiri mu mafuta ofunikira komanso njira zina zobwezeretsa zosungunulira.
5. Kutulutsa madzi a Azeotropic / extractive
Pa zosakaniza zomwe zimapanga azeotropes (kupangidwa kwa nthunzi kumafanana ndi kupangidwa kwa madzi), kusungunuka kwachizolowezi kumakhala kovuta kupeza chiyero chapamwamba. Yankho: kuwonjezera entrainer (azeotrope) kapena chosungunulira chosankha (chochotsera) kuti chisinthe kusinthasintha kwa relative volatility. Chitsanzo chachikale: kuyeretsa ethanol kuchokera ku chisakanizo cha ethanol-madzi.
Magawo Ofunika Ogwirira Ntchito
Kuti makina oyeretsera zinthu azigwira ntchito bwino, ogwiritsa ntchito ndi mainjiniya amayang'ana kwambiri magawo angapo:
– Kupanikizika kwa mzati: Kumakhudza kutentha kwa mpweya ndi VLE. Kupanikizika kwakukulu kumawonjezera kutentha kwa ntchito; kupanikizika kochepa kumathandiza zinthu zomwe zimakhudzidwa ndi kutentha.
– Chiŵerengero cha Reflux: Reflux ikakwera, nthawi zambiri chiyero chimawonjezeka, koma kugwiritsa ntchito mphamvu kumawonjezekanso.
– Kuchuluka kwa kuwira/kuwotcha: Kumazindikira kuchuluka kwa nthunzi yomwe ikukwera; kutsika kwambiri kumapangitsa kuti pakhale kusiyana kosakwanira, kukwera kwambiri kungayambitse kusefukira kwa madzi.
- Chiwerengero cha magawo ophunzirira ndi luso la thireyi/kulongedza: Lingaliro la magawo ophunzirira limathandiza kupanga. Kuchita bwino kwenikweni kumakhudzidwa ndi mphamvu ya hydrodynamics ndi mawonekedwe enieni a chisakanizocho.
– Mikhalidwe ya chakudya (kutentha, gawo, kapangidwe kake, liwiro): Mikhalidwe ya chakudya imakhudza momwe kutentha kulili komanso kuchuluka kwa mizati. Zotenthetsera kapena ma drama nthawi zambiri amagwiritsidwa ntchito kukonza chakudya.
Matenda Ofala Opaleshoni
Mu ntchito yeniyeni, mizati yothira madzi imatha kukumana ndi mavuto awa:
– Kusefukira kwa madzi: Kutuluka kwa nthunzi kumakhala kokwera kwambiri kotero kuti madziwo amavutika kutsika; zomwe zimapangitsa kuti kuthamanga kwa mpweya kukwere, zomwe zimachepetsa ubwino wa chinthucho.
– Kulira/kutaya: Nthunzi imakhala yotsika kwambiri kotero kuti madzi amalowa mu thireyi; kukhudzana ndi nthunzi ndi madzi kumachepa.
– Kutulutsa thovu: Thovu limawonjezera kulowetsedwa kwa madzi m'thupi, kuchepetsa kuyera.
- Kulowetsa: Madontho amadzimadzi omwe amanyamulidwa ndi nthunzi kupita pamwamba; amatha kuipitsa distillate.
– Kufooketsa/kukula: Madepoziti amachepetsa kusamutsa kutentha mu reboiler/condenser ndikutseka kulongedza/thireyi.
Kuthetsa mavuto amenewa nthawi zambiri kumaphatikizapo kusintha mphamvu ya reboiler, reflux, pressure, kapena kukonza nthawi ndi nthawi (kuyeretsa ndi kuyang'anira mkati).
Kugwiritsa Ntchito Mphamvu Moyenera ndi Kuphatikiza Kutentha
Kusungunula kumadziwika kuti ndi njira yogwiritsira ntchito mphamvu zambiri chifukwa cha kutentha ndi kuzizira kwambiri komwe kumafunika. Makampani amakono amafuna kuwonjezera magwiridwe antchito mwa:
- Kuphatikiza kutentha: Kugwiritsa ntchito kutentha kuchokera ku njira zina zophikira chakudya.
- Kutulutsa mpweya pogwiritsa ntchito mphamvu zambiri komanso kutentha pampu: Kugwiritsa ntchito mphamvu ya nthunzi kapena mphamvu yolamulira kuthamanga kuti "mubwezeretsenso" kutentha kwa madzi.
- Kuwongolera bwino: Advanced Process Control (APC) kumathandiza kuti ntchito ziyende bwino popanda kuwononga ubwino.
Kuyesetsa kugwira ntchito bwino kumeneku n'kofunika, chifukwa ndalama zamagetsi nthawi zambiri zimakhala gawo lalikulu la ndalama zogwirira ntchito za chipangizo choyeretsera.
Chitetezo ndi Zachilengedwe
Makina oyeretsera zinthu zophikidwa ndi kuwiritsa ntchito pa kutentha kwambiri komanso kupsinjika, ndipo nthawi zambiri amagwira zinthu zomwe zimayaka moto, poizoni, kapena zowononga. Chifukwa chake, chitetezo chiyenera kukhala patsogolo:
- Chitetezo cha kuthamanga: Valavu yothandiza komanso makina oyaka kuti mupewe kupanikizika kwambiri.
- Kulamulira kutuluka kwa madzi: Kutseka mapampu, ma flange, ndi makina ozindikira mpweya.
– Kapangidwe ka zinthu: Kusankha zinthu zosagwira dzimbiri (monga chitsulo chosapanga dzimbiri, zitsulo zapadera) malinga ndi momwe zimakhalira ndi mankhwala.
– Kutulutsa mpweya ndi zinyalala: Kulamulira VOC (volatile organic compounds), kuchiza condensate, ndi kupewa kutulutsa zinthu zoopsa.
Kutsatira miyezo (monga API/ASME) komanso kukhazikitsa HAZOP ndi njira zogwirira ntchito molimbika kumathandiza kwambiri kupewa zochitika.
Kutseka
Kumvetsetsa makina oyeretsera zinthu m'makampani opanga mankhwala kumatanthauza kumvetsetsa mgwirizano pakati pa thermodynamics, kusamutsa zinthu zambiri, kusamutsa kutentha, kapangidwe ka zida, ndi njira zowongolera. Kuyeretsera zinthu sikungokhala chipangizo cholekanitsa zinthu, koma ndi njira yolumikizirana yomwe imatsimikiza mtundu wa chinthu, kugwiritsa ntchito mphamvu, komanso chitetezo cha njira. Mwa kusankha njira yoyenera yoyeretsera zinthu, kapangidwe koyenera ka mizati, komanso magwiridwe antchito olamulidwa bwino, makampaniwa amatha kupanga zinthu za mankhwala zoyera kwambiri komanso zotetezeka.
Ngati mukufuna, nditha kusintha nkhaniyi kuti ikhale yaukadaulo kwambiri (ndi zitsanzo za kuwerengera kwa reflux ratio, magawo a theoretical, kapena McCabe–Thiele) kapena yotchuka kwambiri kwa owerenga ambiri.
