1. Ushwankathelo lwesehlo

Inkqubo yokupholisa yeyunithi engama-25 MW isebenzisa ezimbini  iimpompo zecasing eziqhekezayo. Impompo yedatha yeplate yegama nganye:

Ukuhamba (Q): 3,240 m³/h

Intloko yoyilo (H): 32 m

Isantya (n): 960 rpm

Amandla (Pa): 317.5 kW

I-NPSH efunekayo (Hs): 2.9 m (≈ 7.4 m NPSHr)

Kwiinyanga nje ezimbini, enye i-impeller yepompo yagqobhoza ngenxa yokhukuliseko lwe-cavitation.

2. UPhando lweNdawo kunye noDiagnostics

Ufundo loxinzelelo kwigeyiji yokukhupha: ~0.1 MPa (ngokuchasene nokulindelekileyo ~0.3 MPa ngentloko ye-32 m)

Iimpawu eziphawulweyo: ukuguquguquka kweenaliti ezinobundlobongela kunye ne-cavitation "popping" izandi

Uhlalutyo: Impompo ibisebenza kude ngasekunene kweNqanaba layo lokuSebenza ngokuGqwesileyo (BEP), ihambisa kuphela ~ 10 m intloko kune-32 m.

3. Uvavanyo lwe-On-site kunye noQinisekiso lweMbangela yeNqaku

Abaqhubi babethe kancinci ivalve yokukhupha impompo:

Uxinzelelo lokukhupha lwenyuka ukusuka kwi-0.1 MPa ukuya kwi-0.28 MPa.

Ingxolo yeCavitation yaphela.

Ivacuum yeCondenser iphuculwe (650 → 700 mmHg).

Umahluko wobushushu kwi-condenser yehla ukusuka kwi ~33 °C ukuya ku-<11 °C, iqinisekisa isantya sokuqukuqela esibuyiselweyo.

Isiphelo: I-Cavitation ibangelwa ukusebenza okuphantsi kwentloko / ukuhamba okuphantsi, kungekhona ukuvuza komoya okanye ukungaphumeleli komatshini.

4. Kutheni ukuvala iValve isebenza

Ukugxotha ukukhutshwa kwandisa ukuchasana kwenkqubo yonke, ukuguqula indawo yokusebenza yempompo ekhohlo ukuya kwi-BEP yayo-ukubuyisela intloko eyaneleyo kunye nokuhamba. Nangona kunjalo:

I-valve kufuneka ihlale kuphela ~ 10% evulekile-ibeka ukuguga kunye nokungasebenzi.

Ukubaleka ngokuqhubekayo phantsi kwezi meko zokuxinana akunamali kwaye kunokubangela umonakalo wevalvu.

5. Isicwangciso soLawulo kunye nesisombululo

Ukunika iingcombolo zempompo zoqobo (intloko eyi-32 m) kunye nemfuneko yokwenyani (~12 m), ukucheba i-impeller bekungenzeki. Isisombululo esicetyiswayo:

Ukunciphisa isantya semoto: ukusuka kwi-960 rpm → 740 rpm.

Yila kwakhona ijiyometri ye-impeller ukuze usebenze ngokufanelekileyo ngesantya esisezantsi.

Isiphumo: I-Cavitation isusiwe kunye nokusetyenziswa kwamandla kuncitshiswe kakhulu-kuqinisekiswe kuvavanyo olulandelwayo.

6. Izifundo Ezifundiweyo

Ngalo lonke ixesha ubukhulu icasing casing iipompo ezikufutshane ne-BEP yazo ukuphepha umonakalo we-cavitation

Ukubeka iliso kwi-NPSH—NPSHa kufuneka igqithe kwi-NPSHr; ukulawulwa kwe-throttle yi-band-aid, kungekhona ukulungiswa

Amayeza aphambili:

Lungisa ubungakanani be-impeller okanye isantya sokujikeleza (umzekelo, VFD, ibhanti yokuqhuba),

Inkqubo yombhobho kwakhona ukunyusa intloko yokukhupha,

Qinisekisa ukuba iivalvu zilinganiswe ngokufanelekileyo kwaye uthintele iimpompo ezisebenza ngokusisigxina

Qalisa ukubekwa esweni kwentsebenzo ukuze kubonwe umsebenzi osezantsi, ohamba kancinci kwangethuba.

7. Isiphelo

Eli tyala ligxininisa imfuneko yokulungelelanisa ukusebenza kwempompo kunye neenkcukacha zayo zoyilo. Ipompo yecasing casing enyanzeliswa ukuba isebenze kude ne-BEP yayo iya ku-cavitate-nokuba iivalve okanye izitywina zibonakala zilungile. Izilungiso ezifana nokunciphisa isantya kunye ne-impeller redesign ayinyangeli i-cavitation kuphela kodwa iphucula ukusebenza kakuhle kwamandla.