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.
Ixesha lokuposa: Nov-27-2021