Kev tiv thaiv Peripheral siv kab rov tav Anode Trench sab nraum lub Tank Dike

PKev tiv thaiv eripheral Siv Kab rov tav Anode Trench sab nraum lub Tank Dike

Scenario:Rau 50,000 m³ crude roj cia tank, sab nraud cathodic tiv thaiv ntawm lub tank hauv qab yog obstructed los ntawm lub pob zeb nplhaib phab ntsa. Pa anodes tsis tuaj yeem muab tso rau ze ntawm lub tank hauv qab ntug.

Ib qho MMO tubular anode (ntev 1.2 metres) yog faus kab rov tav hauv coke cua trench 1.5 meters tob sab nraum lub nplhaib phab ntsa. Ib tug 1 × 16 mm² cable yog txuas mus rau lub anode Tail thiab nthuav tawm rau 50 meters. Cov kab no tau muab tso rau hauv lub trench hauv qab φ50 mm PVC conduit, xa mus rau chav rectifier 50 meters deb ntawm lub tank ua liaj ua teb.

Qhov ntev ntawm 50-meter cable tsis tau xaiv; Nws yog muab los ntawm cov ciam teb ntawm thaj chaw tawg-pov thawj thiab qhov chaw rectifier. Lub rectifier zoo davhlau ya nyob twg txuas mus rau lub cable no, thiab qhov tsis zoo davhlau ya nyob twg mus rau lub tank hauv qab grounding lug. 16 mm² cross-section kom ntseeg tau tias ntawm qhov siab tshaj plaws tso zis tam sim no ntawm 15 A, qhov kub nce siab tsis tshaj 15℃saum ambient. Ntu ntu no kuj ua tau raws li qhov muaj peev xwm tiv taus rau qhov ua txhaum luv luv hauv lub tank ua liaj ua teb (kwv yees luv luv tam sim no kwv yees li 1.2 kA, thermal withstand verified).

Kev ceev faj txog kev teeb tsa: Tsis muaj qhov nruab nrab splices raug tso cai rau ntawm qhov raug 50-meter cable. Qhov twg nws hla cov pob zeb ua pob zeb, lub tes tsho steel ntxiv rau kev tiv thaiv. Ntawm lub qhov hluav taws xob rectifier, 5% ntxiv ntev yog tshwj tseg raws li slack los tiv thaiv cov tub ntxhais hlau tawg vim av sib haum xeeb. Cov ntaub ntawv kev ua haujlwm hauv teb qhia tau hais tias qhov kev tiv thaiv muaj peev xwm ntawm lub tank hauv qab ntug nce mus txog -0.95 V (CSE), thiab thaj chaw nruab nrab yog -0.88 V, nrog qhov sib txawv ntawm tsawg dua 100 mV, qhia txog kev tiv thaiv zoo ib yam.

Nco tseg:
CSE=tooj liab / tooj liab sulfate siv electrode.
NACE SP0169=tus qauv ntawm National Association of Corrosion Engineers.
IP68=ingress tiv thaiv ntsuas.
HDPE=high-density polyethylene.
PVC=polyvinyl chloride.
Tag nrho cov ntaub ntawv ranges (piv txwv li, 0.18 V / 100m voltage poob, ± 5% tam sim no qhov sib txawv ntawm qhov sib txawv) yog xam qhov tseem ceeb los ntawm kev ua haujlwm engineering