Ukukhethwa kwezinto eziphathekayo kwiivalvu zekhemikhali kuzo zonke iivalve zebhola ezidibeneyo

Ukonakala yenye yeengozi zezixhobo zekhemikhali intloko ebuhlungu.Ukungakhathali okuncinci kunokonakalisa isixhobo, okanye kubangele ingozi okanye intlekele.Ngokwezibalo ezifanelekileyo, malunga ne-60% yomonakalo wezixhobo zeekhemikhali ubangelwa ukubola.Ke ngoko, ubume besayensi bokukhethwa kwezinto kufuneka kuthathelwe ingqalelo xa ukhetha ivalve yemichiza.

Iingongoma eziphambili zokukhetha izinto eziphathekayo:

1. I-asidi ye-Sulphuric yimathiriyeli ebalulekileyo yemizi-mveliso enoluhlu olubanzi kakhulu lokusetyenziswa.I-asidi ye-sulfuric yoxinzelelo oluhlukeneyo kunye namaqondo obushushu anomahluko omkhulu kwi-corrosion yezinto.Intsimbi yekhabhoni kunye nentsimbi ephosiweyo inokumelana ne-corrosion engcono, kodwa ayifanelekanga ukuhamba ngesantya esiphezulu se-asidi ye-sulfuric kwaye ayifanelekanga ukusetyenziswa.Izinto zevalve yempompo.Ke ngoko, iivalvu zempompo ze-asidi ye-sulfuric zihlala zenziwe nge-high-silicon cast iron kunye ne-high-alloy steel stainless.

2. Uninzi lwezixhobo zetsimbi azikwazi ukumelana ne-hydrochloric acid corrosion.Ngokuchasene nezixhobo zetsimbi, izinto ezininzi ezingezizo zetsimbi zinokumelana ne-corrosion efanelekileyo kwi-hydrochloric acid.Ngoko ke, iivalve zerabha kunye neeplasitiki ezifakwe nge-hydrochloric acid zizona zikhetho ezifanelekileyo zokuthutha i-hydrochloric acid.

3. I-asidi ye-nitric, ininzi yesinyithi i-corrod ngokukhawuleza kwaye itshatyalaliswe kwi-nitric acid.Intsimbi engatyiwa yeyona nto isetyenziswa kakhulu kwinitric acid resistant.Inokumelana ne-corrosion elungileyo kuzo zonke izigxina ze-nitric acid kwiqondo lobushushu begumbi.Kubushushu obuphezulu be-nitric acid, i-titanium kunye ne-titanium zidla ngokusetyenziswa.Izinto ze-alloy.

4. I-acetic acid yenye yezona zinto zidla kakhulu kwi-organic acids.Intsimbi eqhelekileyo iya kuba ne-corrod kakhulu kwi-acetic acid kuzo zonke iindawo kunye namaqondo okushisa.Insimbi engagqwali yeyona nto ibalaseleyo yokumelana ne-acetic acid, enoburhalarhume kubushushu obuphezulu kunye noxinzelelo oluphezulu lwe-acetic acid okanye ezinye imidiya ezonakalisayo.Xa kuyimfuneko, iivalve zensimbi ezingenasici okanye i-fluoroplastic valves zingakhethwa.