Ukuthi i-HDPE pipe ithintela ukuphatha kwe-corrosion ne-chemical degradation ngamazwana?

Okuhlangenwe nakho kwezwe langempela nge-Infrastructure ye-Fluid Long Term

Ukusebenza embonini yokuthuthwa kwamanzi angcolile ngasogwini eminyakeni embalwa edlule kwangivulela amehlo amaqiniso abuhlungu okuwohloka kwezinto ezibonakalayo. Lesi sakhiwo sasisebenzisa imigqa yensimbi yendabuko eyahluleka kakhulu ezinyangeni ezingu-24 nje kuphela ngenxa yokuwohloka okukhulu kwamakhemikhali okubangelwa ukugeleza kwe-asidi. Ukushintsha inethiwekhi yonke ngopayipi we-HDPE osezingeni eliphakeme kwaguqula izinto ngokuphelele ngoba le polymer ethuthukile ingamelana kalula nokugqwala okubangelwa amanzi anosawoti nezakhi zamakhemikhali ezinzima. Abaqashi basensimini bavame ukubhekana nobunzima bokuthola izinto ezingamelana nokugqwala kahle lapho besebenza nenhlabathi enamandla, okwenza i-polyethylene enobuningi obuphezulu ibe ukukhetha okuhle ezindaweni ezinzima. Phakathi namashumi eminyaka yokusebenza, ipayipi elijwayelekile livame ukuqhuma noma ukugqwala, kodwa ipayipi le-HDPE lezimboni ligcina udonga lwalo lwangaphakathi lugxilile ngaphandle kokubonisa izimpawu zokuwohloka kwamakhemikhali. Ukukhetha isixazululo sokuphehla amapayipi esingamelana nokugqwala ngokwemvelo kusindisa omasipala namabhizinisi azimele izigidi ngezindleko zokugcina eziphuthumayo, yingakho ukusebenzisa ipayipi le-HDPE sekuyisu eliqinisekile lokuvimba ukuwohloka kwamakhemikhali kumanethiwekhi anamuhla oketshezi.

Ukuphakanyiswa Kwemolekyuli nechemistry yepolyethylene

Ukuze uthole ukuthi ngani iphaipi yase-HDPE esinezindaba eziningi iyakwenzeka ukuthabatha ubuhlungu bokubulawa ngokuphambili kusukela eminyakeni eminingi, kudingekile ukubuka ngokushesha isithembiso sayo sesikhundleni. I-polyethylene esinezindawo eziningi (HDPE) inesithembiso esingasipheleli, esinezindawo eziningi, nesithembiso esingasibambelela kakhulu, sokwenza izihlomelo zesikhundleni esizinga kakhulu ezisikhethelela ukuthi izinto ezingaphakathi zizame ukuthabatha ubuhlungu bokubulawa ngokuchemical. Ngoba le mithi yilokhu okungachemical, amahashi, amabase, nemithi eyodwa engeziweyo ayikwazi ukuthanda nezihlomelo zezinhlobo zokubulawa, okuvumela iphaipi yase-HDPE ukuthabatha ubuhlungu bokubulawa nakuba iyathabatha izinhlobo zezinhlobo zokusebenza zokusebenza kakhulu. Ngaphezu kwezinhlobo zezinkambo eziphakathi ezinamandla okuthabatha ubuhlungu bokubulawa ngokuchemical, le mithi yokuqondisa ayikwazi ukuthabatha ubuhlungu bokubulawa noma ukuthabatha ubuhlungu bokubulawa ngokuchemical, okuvumela ukuthabatha ubuhlungu bokubulawa ngokuchemical kuzo konke. Amathimba okufunda ayisiza le mithi ngokuthi ayithabatha ubuhlungu bokubulawa ngokuphambili ngokuthabatha ubuhlungu bokubulawa ngokuchemical kusukela eminyakeni eminingi. Ngokuthabatha ubuhlungu bokubulawa ngokuchemical, iphaipi iyathabatha ubuhlungu bokubulawa ngokuphambili ngokuthabatha ubuhlungu bokubulawa ngokuchemical kusukela eminyakeni eminingi, okuvumela ukuthi iphaipi iyathabatha ubuhlungu bokubulawa ngokuphambili ngokuthabatha ubuhlungu bokubulawa ngokuchemical kusukela eminyakeni eminingi.

Ukuqinisa Ukuphatha Kwesikhathi Eside Kwezinhloso Zokubaluleka Kwesakhiwo Ngamatikho Asebenzayo

Ukuchaza okuthembekile kuze kusukela emazwe amaningi njengokwesikhungo sokuchaza izihlilo sezihlilo sika-Plastics Pipe Institute kubonisa ukuthi izihlilo zesihlilo se-HDPE esizakhiwe ngendlela engeziwe zinomlando wokusebenza ozingelwe ngaphezu kwezinsizwa ezingu-100. Izimboni zokuzivocavoca zibonisa ukuthi umphumela wokugcina isihlilo se-high-density polyethylene ukuthi sisebenza ngokuphambuka kwezinhlobo zezihlilo zokugcina zisiza ukuthi isistimu sisebenze ngokuphambuka kwezinhlobo zezihlilo zokugcina ngaphandle kokugcina kwezinhlobo zezihlilo zokugcina ngokuphambuka kwezinhlobo zezihlilo zokugcina. Abasemthethweni besho ukuthi izihlilo zezinsizwa zisigcina ngokuphambuka kwezinhlobo zezihlilo zokugcina, ngakho-ke izihlilo zesihlilo se-HDPE eziphathelwe ngokuphambuka kwezinhlobo zezihlilo zokugcina zisigcina ukusebenza ngokuphambuka kwezinhlobo zezihlilo zokugcina ngaphandle kokugcina kwezinhlobo zezihlilo zokugcina. Lezi zimboni zokusebenza ngokuphambuka kwezinhlobo zezihlilo zokugcina zisiza abaphathi basezindini ukuthi bafunde ukuthi izihlilo zokugcina zisigcina ngokuphambuka kwezinhlobo zezihlilo zokugcina ngaphandle kokugcina kwezinhlobo zezihlilo zokugcina. Uma abachazi batekhniki bahlale bavocavoca izimboni zokusebenza ngokuphambuka kwezinhlobo zezihlilo zokugcina, bafunda ukuthi ukukhetha izihlilo zesihlilo se-HDPE yindlela eyinkulu yokugcina izihlilo zokugcina ngaphandle kokugcina kwezinhlobo zezihlilo zokugcina. Idata yesithunywa sibonisa ukuthi ukukhishwa kwezinhlobo zezihlilo zokugcina ngokukhetha izihlilo ezifanele yindlela eyinkulu yokugcina izihlilo zokugcina ngaphandle kokugcina kwezinhlobo zezihlilo zokugcina.

Ukunciphisa Imali Yokusebenza futhi Ukubaluleka Kwemisebenzi Yomhlaba

Ngokombono wokusebenza, ukusebenzisa ipayipi le-HDPE elingamelana nokugqwala njalo kuletha ukonga okukhulu kwezezimali kulo lonke umjikelezo wokuphila wephrojekthi. Lapho ingqalasizinda igwema ukuwohloka kwamakhemikhali, izinsiza-kuhle zomphakathi akudingeki zibhekane nokulahleka kwamanzi njalo, ukwehla kwengcindezi endaweni ethile, noma imisebenzi ebizayo yokuwasha amanzi. Umphezulu wangaphakathi ogudile wepayipi le-HDPE uhlala ukhululekile ngokuphelele ekuqongeleleni kwesikali, ugcine umthamo omkhulu wokuhamba ngenkathi uvumela uhlelo ukuba lumelane nokugqwala kokukhula kwezinto eziphilayo ngaphakathi. Ngaphezu kwalokho, ukuvimbela ukubola kwamakhemikhali kuqinisekisa ukuthi izindonga zamapayipi azibi mncane ngokuhamba kwesikhathi, kunciphise amathuba okuqhekeka okukhulu noma ukungcoliswa kwemvelo. Ochwepheshe basensimini bayaqaphela ukuthi ipayipi le-HDPE lingamelana nokugqwala ngaphandle kokudinga izinhlelo ezibizayo zokuvikela i-cathode noma izembozo zamakhemikhali ezenza ukusebenza kube nzima. Ngokukhetha isixazululo esivimbela ukubola kwamakhemikhali ngokwemvelo, abaphathi bezakhiwo bathola izindleko eziphansi zokuphatha ngenkathi bejabulela ukuthula kwengqondo okungenakuqhathaniswa okuhlinzekwa yipayipi le-HDPE elihlala isikhathi eside.

Imizindlela Yokuqala Yokuphatha Amathuba Okukhokha Kwemikhosi Yasezulwini

Ukuqinisekisa izinto ezisebenza kahle ezingamelana nokugqwala kudinga umlingani onekhono lokukhiqiza elihlukile kanye nohlu lwezinto ezithengiswayo emhlabeni wonke oluthembeke kakhulu. Yilapho i-BSX ivelela khona, isebenzisa ubuchwepheshe obusezingeni eliphezulu bokucindezela nokulawula ikhwalithi ngokucophelela ukuze ikhiqize amapayipi e-HDPE asezingeni eliphakeme anqoba kalula ukuwohloka kwamakhemikhali. Amandla amakhulu okukhiqiza e-BSX aqinisekisa ukuthi amaphrojekthi ezakhiweni ezinkulu athola ikhwalithi yezinto ezibonakalayo engaguquguquki ngesikhathi esiqondile, asize amanethiwekhi okuhambisa emhlabeni wonke ukuba ahlinzeke izingxenye eziphikisana nokugqwala ngokuphelele. Ngokugxila ekufakweni kwe-resin okuphambili kanye nokulinganiselwa okuqondile kokukhulu kwezindonga, i-BSX inikeza izixazululo ezivelele ezenzelwe ukuqeda ukuwohloka kwamakhemikhali ezinhlobonhlobo zezicelo zomasipala nezimboni. Kungakhathaliseki ukuthi iphrojekthi idinga imigqa yokusabalalisa ephezulu noma izinhlelo eziqinile zamanzi angcolile, ukuthembela ekukhiqizeni okuqondile kanye nezinsizakalo ezibanzi zokuphakelayo ze-BSX kuqinisekisa ukuthi wonke amapayipi e-HDPE afakiwe azoqhubeka nokumelana nokugqwala futhi avimbele uku