Abantu abaninzi abakaze beve nge-triethyl aluminium (TEAL), kodwa idlala indima ephambili ekwenziweni kweemveliso ezibonwa ngabantu kwaye bazichukumise yonke imihla. I-TEAL yikhompawundi ye-organoaluminium (ikhabhoni kunye ne-aluminiyam) esetyenziselwa ukuvelisa iiplastiki ezinoxinano oluphezulu kunye nobuninzi obuphantsi, irabha, amayeza, i-semiconductors, kunye neepolima ezifunekayo “kwi-alcohol enamafutha” kwizicoci kunye nezicoci zezandla.
Iipolymers zisebenza ngokudibanisa iimolekyuli (okanye iimonomers) zibe ngamatyathanga amakhulu anokusetyenziswa ukwenza iimveliso. Kwiipolymers eziphilayo, umqolo wale mixokelelwane yikhabhoni kunye ne-organometallic compounds, njenge-TEAL. Ezi zixhobo zibonelela ngekhabhoni efunekayo kwi-polymerization reaction. Kwimveliso yezinye zeplastiki eziqhelekileyo, ukudibanisa kwe-TEAL kunye ne-titanium tetrachloride kunokuvelisa i-Ziegler-Natta catalysts. Le yi-catalyst efunekayo ukuqalisa ukusabela kweekhemikhali ezikhokelela kwi-linear olefin polymerization ukuvelisa i-polyethylene kunye ne-polypropylene.
Nawuphi na umzi-mveliso ogcina okanye uqhubekisa i-TEAL kufuneka iqwalasele ukuguquguquka kwemichiza. I-TEAL yipyrophoric, okuthetha ukuba iya kutshisa xa ibekwe emoyeni. Ngapha koko, ukusabela okunamandla kwale khemikhali kunye ne-cryogenic liquid oxygen sesinye sezizathu zokusetyenziswa kwayo njengenqanaba lokuqala le-rocket igniter yenkqubo ye-SpaceX. Inye into onokuyithetha: kufuneka kuthathwe unonophelo olugqithisileyo xa uphatha le nto. Kubenzi beplastiki abapompa le khemikhali yonke imihla, iimpompo kuphela ezenzelwe ngokukodwa esi sicelo zingasetyenziswa. Unonophelo olongezelelweyo kufuneka luthathwe ukuqinisekisa ukuba i-catalyst ayibonakali emoyeni ngexesha lokucubungula.
Xa ukhetha impompo yezicelo ze-TEAL, ukuchaneka kubaluleke kakhulu. Inkqubo nganye yeekhemikhali ilandela ifomula ethile. Ukutofa kakhulu okanye kuncinci izithako eziphambili aziyi kuvelisa iziphumo ezifunwayo. Iimpompo zokulinganisa ezinokuthi zifake ngokuthe ngqo isixa esifunekayo sekhemikhali (ngokuchaneka kwe +/- 0.5%) lukhetho lokuqala kubenzi beekhemikhali izicelo ze-TEAL.
Ngokumalunga nokuhamba kunye noxinzelelo, i-TEAL idla ngokulinganiswa nomthamo ongaphantsi kweelitha ezingama-50 ngeyure (gph) kunye noxinzelelo olungaphantsi kweepounds ezingama-500 nge-square inch gauge (psig), ephakathi koluhlu lweepompo ezininzi zemitha. Inxalenye ephambili yenkqubo ye-polymerization ihambelana ngokupheleleyo ne-American Petroleum Institute (API) ye-675 imimiselo, ukuchaneka kunye nokuthembeka. I-TEAL ikhetha iimpompo ezenziwe nge-316 yensimbi engenasici ekupheleni, i-valve yebhola ye-316 LSS kunye nesihlalo, kunye ne-polytetrafluoroethylene (PTFE) diaphragm ukwandisa ubomi bale khemikhali eyingozi.
Ukhuseleko kunye nokuthembeka Ipompo yokulinganisa i-diaphragm (HAD) eqhutywa nge-hydraulically driven inokusebenza ngokuthembekileyo amashumi eminyaka kwaye inexesha elide phakathi kokugcinwa (MTBR). Oku kubangelwa ikakhulu kuyilo lwempompo. Ngaphakathi ekupheleni kolwelo, umthamo kunye noxinzelelo lwe-hydraulic fluid kwelinye icala le-diaphragm lilingana noxinzelelo lwenkqubo yolwelo kwelinye icala, ukuze i-diaphragm igcine ibhalansi elinganayo phakathi kwamanzi amabini. I-piston yempompo ayinakuze ichukumise i-diaphragm, ihambisa ioli ye-hydraulic kwi-diaphragm, ibangela ukuba igobe ngokwaneleyo ukuhambisa inani elifunekayo lenkqubo yolwelo. Olu luyilo luphelisa uxinzelelo kwi-diaphragm kwaye lunobomi obude benkonzo.
Nangona ubomi obude bubalulekile, okuphambili kufuneka kunikwe ukuthembeka ngaphandle kokuvuza. Iimpompo zokulinganisa usetyenziso lwe-TEAL kufuneka zixhotyiswe ngeevalvu ezidityanisiweyo zokujonga ukunciphisa iindlela ezinokuthi zivuze. Intonga yangaphandle ye-4-bolt tie inika uxhulumaniso oluqinileyo kunye noluthembekileyo lombhobho. Ixesha elide, ukungcangcazela kwangaphandle koxhumo lombhobho kunokubangela ukuvuza kunye neengxaki ezinkulu zempompo.
I-PTFE diaphragm inerekhodi elungileyo lokumpompa i-TEAL. Ezi mpompo kufuneka zibe ne-diaphragm ephindwe kabini kunye nomsebenzi wokubona ukuvuza, njenge-gauge ye-pressure gauge okanye indibaniselwano ye-pressure gauge kunye nokutshintsha ukulumkisa ngeengxaki ezinokubakho.
Njengomaleko wesithathu wokukhusela, i-nitrogen blanket kwi-hydraulic casing kunye ne-gearbox iya kuthintela ulwelo lwe-pyrophoric ukuba lungabonakali emoyeni.
Ukugcinwa Ivalve yokutshekisha kwipompo yokulinganisa, ehamba ngee-stroke ze-150 ngomzuzu, iintsuku ezingama-365 ngonyaka, iya kuvula kwaye ivale amaxesha angaphezu kwezigidi ezingama-70 ngonyaka. Ukugcinwa okusemgangathweni okanye i-KOP (ukugcina ukumpompa) ikiti inika iindawo ezifunekayo ukutshintsha i-valve yokujonga ipompo, equka i-diaphragms, i-O-rings kunye ne-seals. Njengenxalenye yokugcinwa kokukhusela, kufuneka kubandakanye ukutshintsha ioli ye-hydraulic yempompo.
Imfuno yeplastiki yezixhobo zokukhusela zomntu (i-PPE), kunye namaxabiso e-oyile aphantsi ukunciphisa iindleko zempahla ekrwada, kuthetha ukunyuka kwemveliso kunye nesidingo se-metered volatile catalysts (efana ne-TEAL).
UJesse Baker yinkokeli yorhwebo yeentengiso zePulsafeeder, ulawulo lwemveliso, ubunjineli kunye namaqela eenkonzo zabathengi. Ungaqhagamshelana naye jbaker@idexcorp.com. Ngolunye ulwazi, nceda undwendwele www.pulsafeeder.com.
Ixesha lokuposa: Jan-20-2021
