Kwadalwa ngo 08.17

Namathisela Ezingeni Eziphezulu Zekhwalithi | Amapayipi Omkhiqizo we-Yandang Asekelana Nephrojekthi Elikhulu Lokukhipha Usawoti Emanzini Olwandle

I-Yandang Brand iyaziqhenya ukumemezela iqhaza layo kuphrojekthi ebalulekile ye-desalination ye-Belt and Road, ihlinzeka ngamapayipi e-CPVC/UPVC asezingeni eliphezulu ahlangabezana nezindinganiso eziqinile zokumelana nokugqwala.

Imisebenzi yokukhipha usawoti emanzini olwandle iyimisebenzi eyisibonelo ngaphansi kwe-Belt and Road Initiative yokubambisana kwamanzi phesheya kwezilwandle kanye nengqalasizinda yezwe elibalulekile yokuphepha kwamanzi, enezindinganiso eziqinile kakhulu zokufinyelela kumapayipi mayelana nokumelana nokugqwala kosawoti ophezulu, ukuncipha okuphansi kokungcola, ukuqina kokuvinjelwa kwesikhathi eside kanye nokuzinza komjikelezo wokuphila ogcwele. Njengohlelo oluyisisekelo olusekelayo lwezimboni zokukhipha usawoti, amanethiwekhi amapayipi ezimboni kumele amelane nezimo ezinzima ezihlanganisa ama-chloride ion agxile kakhulu (>20,000 ppm), ukushintshashintsha kwe-pH kanye nokunqwabelana kwezinto eziphilayo zasolwandle, kuyilapho kuhlangabezana nezidingo ezihlelekile zokusebenza ngamandla aphansi kakhulu.

Iphrojekthi Yokukhipha Usawoti Emanzini Olwandle Angu-300,000 m³ Yamapayipi E-CPVC/UPVC Yase-Yandang

Leli phrojekthi elikhulu lokukhipha usawoti emanzini olwandle, elikwazi ukucubungula amanzi angu-300,000 m³ ngosuku, lisebenzisa ngokugcwele amapayipi e-CPVC/UPVC asezingeni eliphezulu omkhiqizo we-Yandang. Ngokusekelwe kuhlaka lokuhlola lwe-Life Cycle Cost (LCC) olusebenzisa isikhathi sokusebenza seminyaka engu-30 njengesilinganiso, ithimba lephrojekthi lahlanganisa ngokuhlelekile izingozi zokugqwala kanye nokukhethwa kwezinto ezisetshenziswayo ezingxenyeni ezahlukene zenqubo:

Ingxenye Yenqubo	Izici Zoketshezi	Ingozi Yokugqwala	Isixazululo Se-Yandang
Ukuthatha Amanzi Nokuhlanza Kwasekuqaleni	Amanzi olwandle anokungafihli okuphezulu + i-chlorine eseleyo	Ukugqwala okungamachashaza, ukugqwala okungemingcele	I-UPVC (ukumelana ne-chlorine ephezulu)
I-RO High-pressure (umfutho ophezulu we-RO)	I-brine enomfutho ophezulu	Ukuqhekeka ngenxa yokucindezeleka kokugqwala (stress corrosion cracking)	I-CPVC (ukumelana nokushisa nokucindezela okuphezulu)
I-Post-mineralization kanye Nokunikezelwa Kwamanzi	I-Lime + CO₂	Ukunqwabelana kwezinto (scaling) nokuguguleka (abrasion)	I-UPVC/CPVC
Ukufaka Amakhemikhali (Chemical Dosing)	HCl / NaOH	Ukugqwala okuqinile	CPVC

Imikhiqizo ibonisa ukumelana nokugqwala kwe-chloride ion okuhle kakhulu, ukuzinza kwamakhemikhali okuqinile, ukugeleza okuphansi kanye nokuhambisana nemvelo, kufaneleka ngokugcwele izimo ezingenhla zenqubo eyinhloko, kuhlangabezana ngokugcwele nezimfuneko eziphakeme zezinto zokwakha kanye namazinga amukelwa umhlaba wonke (GB/ASTM) ezitshalweni ezinkulu zokukhipha usawoti olwandle.

Iphrojekthi yakhiwa ngempumelelo futhi yaqalwa ukusebenza ezinyangeni ezi-2 kuphela, iba iphrojekthi yokuqala yalolu hlobo ezweni. Ngesikhathi sokulethwa ngokushesha, amapayipi e-Yandang aqinisekisa ukuhlanganiswa okungenakubambezeleka kohlelo lokufaka amapayipi emzileni obalulekile wephrojekthi ngezinyathelo ezintathu eziyinhloko zokulethwa:

Ukuthembeka — Izinto ezingavuthiwe eziphakeme kakhulu + inqubo yokucindezela enembile iqinisekisa ukungashintshi okungahleliwe kungazange kwenzeke phakathi nempilo yokusebenza yeminyaka engu-30.

Ukukwazi ukwakheka — Inqubo yokuhlanganisa nge-solvent cement ihambisana nesu lephrojekthi lokwakha ngamafasitela, inciphisa kakhulu amahora okufaka endaweni.

Ukuhambisana Kokunikezelwa — Isheduli yokulethwa kwamapayipi yahlelwa iviki ngeviki nezinhlelo zokufaka zamamojula, okwenza kungabibikho ukubambezeleka okubalulekile emgqeni wesikhathi ngenxa yokulethwa kwezinto.

Kusukela kusebenza, amapayipi akwa-Yandang ahlangabezane nezidingo eziyinhloko zokusebenza ngamandla aphansi kakhulu, ukongiwa kwemvelo nokulondolozwa kwemvelo, kanye nokusebenza okuthembekile kwesikhathi eside ngokulawulwa kwekhwalithi okuqinile. Ngokombono womjikelezo wokuphila ogcwele, isixazululo samapayipi epulasitiki yobunjiniyela sinciphisa imvamisa yokulungiswa cishe ngama-70% uma kuqhathaniswa nezixazululo zendabuko zamapayipi ensimbi ane-lining, futhi ubungozi bokuma okungahleliwe kwezinsiza bancishiswa kakhulu, okunikeza isiqinisekiso esiqinile sezingxenye zokusebenza okuqhubekayo nokuzinzile kwamanzi okusetshenziswa nsuku zonke okungu-300,000 m³. Lo mkhuba oyisibonelo ubonisa ngokugcwele amandla aphelele akwa-Yandang kanye nezindinganiso eziqinile zokulawulwa kwekhwalithi ekusetshenzisweni okukhulu kokukhipha usawoti emanzini olwandle kanye nasezindaweni ezinamandla okugqwala.

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