I te kōwhiringa o ngā papu wai, ki te kore e tika te kōwhiringa, tera pea he nui te utu, kāore rānei te mahi tuturu a te papu e tutuki i ngā hiahia o te papaanga. Homai he tauira hei whakaatu i ētahi mātāpono me whai e te papu wai.
Ko te whiriwhiri i te papu momi takirua me aro ki ngā āhuatanga e whai ake nei:
1. Tere:
Ka whakatauhia te tere noa i runga i ngā whakaritenga a te kiritaki. Ka iti ake te tere o taua papu, ka heke te tere rere me te hiki e rite ana. I te wā e whiriwhiri ana i tētahi tauira, me whakaaro ehara i te mea ko te mahi ōhanga anake, engari ko ngā āhuatanga o te papaanga anō hoki, pērā i: te matotoru o te rauemi, te ātete ki te kakahu, te kaha ki te whakapūmau i a ia anō, ngā āhuatanga wiri, me ētahi atu.
2. Te Whakatau i te NPSH:
Ka taea te whakatau i te NPSH i runga i te uara i homai e te kiritaki, i runga rānei i ngā āhuatanga o te putanga mai o te papu, te pāmahana waenga me te pēhanga hau i te papaanga:
Ko te tatau i te teitei tāutanga o te papu wai (he rauropi māmā: e ai ki te pēhanga hau paerewa me te pāmahana wai noa) penei:
I roto i ēnei: hg—te teitei o te tāutanga āhuahanga (ko te uara pai ko te momi ake, ko te uara kino ko te rere whakamuri);
—Te pēhanga wai i te wāhi tāutanga (i tatauhia hei 10.33m i raro i te pēhanga paerewa o te hau me te wai mārama);
hc—te ngaronga waipēhi momi; (mēnā he poto, he māmā hoki te paipa whakauru, ka tatauhia i te nuinga o te wā ko te 0.5m)
—Te upoko pēhanga mimiti; (ka tatauhia te wai mārama i te pāmahana rūma hei 0.24m)
— NPSH e whakaaetia ana; (hei whakarite i te haumaru, tatauhia kia rite ki te NPSHr×1.2, tirohia te rārangi ingoa NPSHr)
Hei tauira, ko te NPSH NPSHr=4m: Kātahi: hg=10.33-0.5-0.24-(4×1.2)=4.79 m (he uara pai te hua whakataunga, ko te tikanga ka taea te mimiti ki te ≤4.79m, arā, ka taea te taumata urunga wai ki roto i te impeller i roto i te 4.79m i raro i te raina pokapū; ki te mea kei raro i te pēhanga kino, me ringihia anō, ā, me nui ake te uara o te ringihia anō i te uara kua tatauhia, arā, ka taea te taumata urunga wai ki runga ake i te uara kua tatauhia ki runga ake i te raina pokapū o te impeller).
Ka tatauhia te mea i runga ake nei i raro i te pāmahana noa, te wai mārama me te teitei noa. Mena he rerekē te pāmahana, te mātotoru me te teitei o te wai, kia kore ai e puta te pirau me ētahi atu raruraru e pā ana ki te mahi noa o te huinga papu, me tīpako ngā uara e rite ana, ā, me whakauru ki roto i te tātai mō te tatau. I roto i ēnei, ka tatauhia te pāmahana me te mātotoru o te wai kia rite ki ngā uara e rite ana i roto i te "Pēhanga Whakamomona me te Mātotoru o te Wai i ngā Pāmahana Rerekē", ā, ka tatauhia te teitei kia rite ki ngā uara e rite ana i roto i te "Teitei me te Pēhanga Āhuarangi o ngā Tāone Nui o te Whenua". Ko tētahi atu NPSH e whakaaetia ana ko te whakarite i te haumaru, kia rite ki te NPSHr×1.4 (ko tēnei uara he 1.4 te iti rawa).
3. Ina ≤0.2MPa te pēhanga tomo o te papu tikanga, ina 1.5 ngā wā te pēhanga tomo + te pane × ≤ te pēhanga, tīpakohia kia rite ki te rauemi tikanga;
Pēhanga tomo + upoko × 1.5 ngā wā > pēhanga pehi, me whakamahi ngā rauemi paerewa e tutuki ana i ngā whakaritenga; ki te nui rawa te pēhanga tomo, ki te nui rawa rānei te pēhanga whakamātautau, me ētahi atu mea kāore e tutuki ana i ngā whakaritenga, tēnā whakaū ki te hangarau hei whakakapi i te rauemi, hei whakatika rānei i te pokepokea ai, hei whakanui ake i te matotoru o te pakitara;
4. Ko ngā tauira hiri mīhini papu tuku iho ko: M7N, M74 me te M37G-G92 raupapa, ko tēhea te mea hei whakamahi ka whakawhirinaki ki te hoahoa papu, ko te rauemi hiri mīhini tuku iho: mārō/ngohengohe (tungsten carbide/graphite); ina ≥0.8MPa te pēhanga tomo, me whiriwhiri he hiri mīhini taurite;
5. E taunakihia ana kia kaua te pāmahana waenga o te papu momi-rua e neke ake i te 120°C. Mēnā he 100°C ≤ pāmahana waenga ≤ 120°C, me whakatika te papu tikanga: me whakauru te kōhao hiri me te wāhanga whāriki ki te wai whakamatao i waho o te kōhao whakamatao; ko ngā mowhiti-O katoa o te papu he mea hanga ki te rapa fluorine (tae atu ki te hiri mīhini).
Wā tuku: Mei-10-2023