Ukugqwala kungenye yezingozi zekhanda lemishini yamakhemikhali. Ukunganaki okuncane kungalimaza imishini, noma kubangele ingozi noma inhlekelele. Ngokwezibalo ezifanele, cishe u-60% womonakalo wemishini yamakhemikhali ubangelwa ukugqwala. Ngakho-ke, imvelo yesayensi yokukhethwa kwezinto kufanele inakwe lapho kukhethwa i-valve yamakhemikhali.
Amaphuzu abalulekile okukhethwa kwezinto ezibonakalayo:
1. I-Sulphuric acid iyimpahla ebalulekile yezimboni enohlu olubanzi kakhulu lokusetshenziswa. I-sulfuric acid yokugxila okuhlukene kanye namazinga okushisa anomehluko omkhulu ekugqwaleni kwezinto. I-Carbon steel ne-cast iron inokumelana nokugqwala okungcono, kodwa ayifanele ukugeleza kwe-sulfuric acid ngesivinini esikhulu futhi ayifanele ukusetshenziswa. Impahla ye-valve yephampu. Ngakho-ke, ama-valve epompo e-sulfuric acid ngokuvamile enziwa nge-high-silicon cast iron kanye ne-high-alloy stainless steel.
2. Izinto eziningi zensimbi azimelani ne-hydrochloric acid corrosion. Ngokuphambene nezinto zensimbi, izinto eziningi ezingezona ezensimbi zinokumelana nokugqwala okuhle kwe-hydrochloric acid. Ngakho-ke, amavalvu enjoloba namavalvu epulasitiki ane-hydrochloric acid ayizinqumo ezingcono kakhulu zokuthutha i-hydrochloric acid.
3. I-nitric acid, izinsimbi eziningi zigqwala ngokushesha futhi zibhujiswe ku-nitric acid. Insimbi engagqwali yiyona nto esetshenziswa kakhulu ukumelana ne-nitric acid. Inokumelana nokugqwala okuhle kukho konke ukugxila kwe-nitric acid ekamelweni lokushisa. Ukushisa okuphezulu kwe-nitric acid, i-titanium ne-titanium zivame ukusetshenziswa. Izinto ze-alloy.
4. I-acetic acid ingenye yezinto ezonakalisa kakhulu kuma-organic acid. Insimbi evamile izogqwala kakhulu ku-acetic acid kukho konke ukugxila namazinga okushisa. Insimbi engagqwali iwumsebenzi omuhle kakhulu omelana ne-acetic acid, enokhahlo ekushiseni okuphezulu kanye nokugxiliswa okuphezulu kwe-acetic acid noma enye imidiya ebolayo. Uma kudingekile, ama-valve ensimbi engagqwali ane-alloy ephezulu noma ama-fluoroplastic valves angakhethwa.
Isikhathi sokuthumela: Nov-27-2021