Ama-hydrocarbons anephunga elimnandi ayisisekelo sezinhlobo eziningi zemikhiqizo, ebaluleke kakhulu esetshenziswa ekukhiqizeni odayi, ama-polyurethanes kanye nemicu yokwenziwa.Imboni ye-Petrochemical imboni ebanzi kakhulu, kepha i-ethylene ingumkhiqizo obaluleke kakhulu, futhi iyimikhiqizo eyinhloko ye-olefin.Ukukhiqizwa kwe-ethylene yonyaka emhlabeni wonke ngo-2012 kwakungamathani ayizigidi ezingu-143.Ngokomlando, ukuhlinzekwa nokusetshenziswa kwe-ethylene bekubuswa yi-United States evuthiwe ngokwezomnotho, eNtshonalanga Yurophu naseJapan.Kusukela ngo-2009 noma ngo-2010, noma kunjalo, isimo sishintshile, ukukhiqizwa nokusetshenziswa kushintshela eMpumalanga Ephakathi nase-Asia.Muva nje ukukhuphuka kwegesi ye-shale yaseMelika kubuyisele ibhalansi yomnotho futhi kubangele ukwanda okukhulu kwamandla okukhiqiza amasha eNyakatho Melika.

I-Ngls ngokuvamile iqukethe i-ethane, i-propane, i-butane, i-isobutene, ne-pentane.Ezinye zazo zilungele imboni ye-petrochemical.I-Ngls ngaphambilini ibonwe njengomkhiqizo ongezwe ivelu ephansi Oshisa eduze komthombo.Nokho, muva nje, abantu bagcine beqaphele ngokugcwele ukubaluleka kwayo njenge-petrochemical raw material.Yilolu shintsho olunikeze amandla ukusimama eNyakatho Melika, futhi ikakhulukazi embonini ye-petrochemical yase-US.

Yini ukubaluleka kokutholwa kabusha kwemboni ye-petrochemical emakethe yama-valve?

Ukuthola kabusha embonini ye-petrochemical yase-US kuyizindaba ezinhle kubahlinzeki bempahla yempahla, okuhlanganisa namavalvu.Kunamathuba ebhizinisi kuzo zonke izingxenye zokuthuthukiswa kwengqalasizinda yamandla.

Ukuqhubeka nokuxhashazwa kwegesi ye-shale enothe ku-condensate yegesi yemvelo (NGLs) kuholele ekuvulweni kwemiklamo eminingi yokumba, okuholele ekudingeni izinhlobo eziningi zamavalvu ekhanda elimanzi Kuhlanganisa isango, iglowubhu, ukuklinywa, isheke, ibhola namanye amavalvu.Cishe ngama-rigs ayi-1,700 asebenzayo e-United States - ngaphezulu kakhulu kunomhlaba wonke uhlangene - isidingo samavalvu ekhanda linamandla futhi sizoba namandla.

I-Ngls yokukhiqiza i-petrochemical idinga inethiwekhi yamapayipi ezinikele ukuwahambisa ezindaweni zokukhiqiza, njengamayunithi okuqhekeka noma izitshalo ze-petrochemical.Iphayiphi elihambisanayo lokuqoqa nelokuthutha linikeze imakethe kuvalvu yepayipi, ikakhulukazi umzila ogcwele wokugeleza futhi “lingase lihlanze ubuhlalu” ivalvu yebhola, ivalve yesango isidingo esikhulu.Futhi ama-actuator lawa ma-valve adinga ukubhangqwa nawo ahlinzeka nethuba lebhizinisi elikhangayo emakethe yezinsiza.

Izitshalo ze-Petrochemical ziyimishini ezenzakalelayo futhi eyinkimbinkimbi.Umphumela wonyaka wesitshalo esisha se-petrochemical ungaba phezulu ngamathani ayizigidi ezi-1-2.Izindleko zalesi sitshalo zincike kusayizi nendawo yaso, kodwa zizoba ku-$3 billion kuya ku-$4 billion.Izindleko zamavalvu ngesitshalo ngasinye zingaba izigidi ezingama- $35.Nakuba kwaziwa kahle ukuthi izitshalo ezintsha zinikeza amathuba ebhizinisi acebe kakhulu naphelele embonini yamavalvu, ukunwetshwa kwezitshalo nokufakwa kabusha ukuze kuhambisane nezinto ezintsha zokukhiqiza nakho kubalulekile, ikakhulukazi emakethe yase-US.Cishe zonke izinhlobo zama-valve ziyasetshenziswa, okuhlanganisa nama-valve asebenza ngesivinini esiphezulu asetshenziswa ezimbonini ukuvikela ama-compressor.