Anthu ambiri sanamvepo za triethyl aluminium (TEAL), koma imagwira ntchito yofunika kwambiri popanga zinthu zomwe anthu amatha kuziwona ndikuzigwira tsiku lililonse. TEAL ndi gulu la organoaluminium (carbon ndi aluminiyamu) lomwe limagwiritsidwa ntchito popanga mapulasitiki olimba kwambiri komanso osalimba kwambiri, mphira, mankhwala, ma semiconductors, ndi ma polima ofunikira pa "mowa wamafuta" mu zotsukira ndi zotsukira manja.
Ma polima amagwira ntchito pophatikiza mamolekyu amodzi (kapena ma monomers) kukhala maunyolo akulu omwe angagwiritsidwe ntchito kupanga zinthu. Mu ma polima organic, msana wa maunyolo awa ndi carbon ndi organometallic mankhwala, monga TEAL. Mankhwalawa amapereka mpweya wofunikira pakuchitapo kwa polymerization. Popanga mapulasitiki odziwika bwino, kuphatikiza kwa TEAL ndi titaniyamu tetrachloride kumatha kupanga zida za Ziegler-Natta. Ichi ndiye chothandizira kuti ayambitse kusintha kwamankhwala komwe kumapangitsa kuti olefin polymerization apangike kuti apange polyethylene ndi polypropylene.
Fakitale iliyonse yomwe imasunga kapena kukonza TEAL iyenera kulabadira kusakhazikika kwa mankhwalawo. TEAL ndi pyrophoric, kutanthauza kuti imayaka ikatuluka mpweya. M'malo mwake, kukhudzidwa kwamphamvu kwa mankhwalawa ndi okosijeni wamadzi a cryogenic ndi chimodzi mwazifukwa zomwe zimagwiritsidwira ntchito ngati gawo loyamba loyatsira roketi la pulogalamu ya SpaceX. Chinthu chimodzi chokha chonena: kusamala kwambiri kuyenera kutengedwa pogwira mankhwalawa. Kwa opanga pulasitiki omwe amapopa mankhwalawa tsiku lililonse, mapampu okha omwe amapangidwira izi angagwiritsidwe ntchito. Chisamaliro chowonjezereka chiyenera kuchitidwa kuti zitsimikizire kuti chothandizira sichikuwululidwa ndi mpweya panthawi yokonza.
Posankha pampu ya ntchito za TEAL, kulondola ndikofunikira kwambiri. Njira iliyonse yamankhwala imatsatira ndondomeko yeniyeni. Kubaya jekeseni wambiri kapena wocheperako sikungabweretse zotsatira zomwe mukufuna. Mapampu oyezera omwe amatha kulowetsamo kuchuluka kwa mankhwala ofunikira (molondola +/- 0.5%) ndi chisankho choyamba kwa opanga mankhwala TEAL ntchito.
Pankhani ya kuyenda ndi kupanikizika, TEAL nthawi zambiri imayesedwa ndi voliyumu yosakwana magaloni 50 pa ola (gph) ndi kupanikizika kochepera ma 500 pounds pa square inch gauge (psig), yomwe ili mkati mwa mapampu ambiri a metering. Gawo lofunika kwambiri la polymerization ndikutsata kwathunthu malamulo a American Petroleum Institute (API) 675, kulondola komanso kudalirika. TEAL imakonda mapampu opangidwa ndi 316 stainless steel liquid end, 316 LSS ball valve and seat, ndi polytetrafluoroethylene (PTFE) diaphragm kuti atalikitse moyo wa mankhwalawa wowopsa.
Chitetezo ndi kudalirika Pampu ya hydraulically driven diaphragm (HAD) imatha kugwira ntchito modalirika kwa zaka zambiri ndipo imakhala ndi nthawi yayitali pakati pa kukonza (MTBR). Izi zimachitika makamaka chifukwa cha kapangidwe ka mpope. Mkati mwa madzi mapeto, voliyumu ndi kuthamanga kwa hayidiroliki madzimadzi pa mbali imodzi ya diaphragm ndi ofanana ndi kuthamanga kwa njira madzimadzi mbali inayo, kotero kuti diaphragm amakhalabe muyezo wofanana pakati pa madzimadzi awiriwo. Pistoni ya pampuyo simakhudza kachidutswa kakang'ono, imasuntha mafuta a hydraulic kupita ku diaphragm, ndikupangitsa kuti ipinde mokwanira kuti isunthire kuchuluka kwamadzimadzi ofunikira. Kukonzekera kumeneku kumathetsa kupsinjika kwa diaphragm ndipo kumakhala ndi moyo wautali wautumiki.
Ngakhale kuti moyo wautali ndi wofunikira, chofunika kwambiri chiyenera kuperekedwa ku kudalirika popanda kutayikira. Mapampu opangira mita a ntchito za TEAL ayenera kukhala ndi ma valve ofunikira kuti achepetse njira zomwe zingatayike. Ndodo yakunja ya 4-bolt imapereka kulumikizana kolimba komanso kodalirika kwa chitoliro. Kwa nthawi yayitali, kugwedezeka kwakunja kwa kulumikizana kwa chitoliro kungayambitse kutayikira komanso mavuto akulu a pampu.
Diaphragm ya PTFE ili ndi mbiri yabwino pakupopera TEAL. Mapampuwa akuyenera kukhala ndi ma diaphragm awiri okhala ndi ntchito yozindikira kutayikira, monga choyezera kuthamanga kapena kuphatikiza koyezera kuthamanga ndikusinthira kuchenjeza zamavuto omwe angachitike.
Monga gawo lachitatu lachitetezo, bulangeti la nayitrogeni mu hydraulic casing ndi gearbox imalepheretsa madzi a pyrophoric kuti asawonekere mlengalenga.
Kusamalira Valve yowunikira pa pampu ya metering, yomwe imayenda pa zikwapu 150 pamphindi, masiku 365 pachaka, idzatsegula ndi kutseka nthawi zoposa 70 miliyoni pachaka. Chida chokonzekera chokhazikika kapena KOP (sungani kupopera) chimapereka magawo ofunikira kuti alowe m'malo mwa valve yowunikira pampu, yomwe imaphatikizapo ma diaphragms, O-rings ndi zisindikizo. Monga gawo lokonzekera zodzitetezera, ziyenera kuphatikizapo kusintha mafuta a hydraulic a pampu.
Kufunika kwa mapulasitiki a zida zodzitetezera (PPE), kuphatikiza mitengo yotsika yamafuta kuti muchepetse mtengo wazinthu zopangira, kumatanthauza kuwonjezeka kwa kupanga komanso kufunikira kwa zopangira metered volatile (monga TEAL).
Jesse Baker ndi mtsogoleri wamalonda wa malonda a Pulsafeeder, kasamalidwe kazinthu, zomangamanga ndi magulu othandizira makasitomala. Mutha kulumikizana naye pa jbaker@idexcorp.com. Kuti mudziwe zambiri, chonde pitani www.pulsafeeder.com.
Nthawi yotumiza: Jan-20-2021
