Txoj kev nyiam ua haujlwm rau txheej txheej saum npoo ntawm lub rooj tsav tsheb xim

Txoj kev nyiam ua haujlwm rau txheej txheej saum npoo ntawm lub rooj tsav tsheb xim

Lub hom phiaj ntawm pretreatment ntawm lub rooj muag xim lub tsheb yog kom tshem tawm cov teeb meem txawv teb chaws uas nqa los ntawm cov xim tha xim thiab muab cov txheej txheem zoo tsim nyog rau cov ntawv yuav tsum tau ua xim kom ntseeg tau tias cov xim muaj zoo tiv thaiv corrosion thiab cov khoom zoo nkauj. Cov xim ua ntej xim tshwj xeeb Muaj dab tsi Cov txheej txheem kho?

1, cev nqaij daim tawv:

Txoj kev ua kom lub cev tsis khov ua kom zoo dua rau saum npoo av, thiab siv cov txheej txheem dua kom tshem tawm cov roj thiab lwm cov av.

Yog tias muaj ntsev sulfate lossis xeb ntsev, yuav tsum tau ntxuav nrog dej huv thiab qhuav nrog huab cua compressed.

Ntawm cov steel phaj ua kab, siv phom tua los yog xuab zeb blasting kom tshem tawm cov oxide teev, xeb thiab lwm yam kev cuam tshuam, thiab tom qab ntawd tshem tawm cov nplaim steel nrog lub tshuab nqus tsev lossis lim huv.

2, ua kua tshuaj:

Ers Cov tshuaj tiv thaiv hom, hom tshuaj tsuag, hom tshuaj tsuag qhov sib xyaw ua ke, hom tshuaj tsuag-dip-tsuag sib xyaw hom.

②Pickling, phosphating slag tshem tawm thiab cov roj-dej sib cais cov cuab yeej siv yog cov tshuab tseem ceeb. Phosphating slag kev tshem tawm muaj cov txheej txheem sedimentation, txoj kev sib cais hydrocyclone, inclined phaj nag lossis daus txoj kev, lub hnab lim txoj kev, phaj thiab thav duab lim xovxwm thiab lwm txoj kev siv tau.

Separation Cov roj-cais dej sib xyaw mas suav nrog: cov txujci adsorption, cov txheej txheem ultrafiltration, roj kub sib cais txoj kev thiab hom kev ua centrifugal.

3. Lub pretreatment ntawm txheej saum npoo muaj plaub txheej txheem:

1) Electrolysis (kev txiav tawm)

Thaum pib ntawm cathode cov tshuaj tiv thaiv yog kev siv tshuaj electrolysis los ua kom muaj hydrogen thiab hydroxide ion OH. Qhov tshuaj tiv thaiv no ua rau thaj chaw muaj kuab lom ntawm cov xim kom tsim rau ntawm cathode nto. Thaum cov ntawv suav thiab hydroxide radicals hnov ​​mob los ua cov dej tsis haum, cov yeeb yaj kiab txheej tso nyiaj. Txoj kab zauv yog ： H2O → OH + H

2) Electrophoresis (kev tsiv teb tsaws chaw, tsiv teb tsaws chaw) cationic resin thiab H + tsiv mus rau cathode nyob rau hauv qhov kev ua ntawm hluav taws xob teb, thaum lub anions txav mus rau anode.

3) Kev Xaiv Hluav Taws Xob (nag lossis daus)

Nyob rau saum npoo ntawm cov co workpiece, cationic resin reacts nrog lub nplaim cathode rau neutralize thiab los nag tsis muaj qhov chaw tsis tso nyiaj, uas tau muab tso rau ntawm cov txheej ua haujlwm.

4) Electroosmosis (lub cev qhuav dej)

Cov tshuaj pleev xim rau thiab cov txheej xim ua rau saum npoo ntawm lub workpiece yog cov npliag, muaj ntau qhov hws. Dej yog drained los ntawm cathode txheej zaj duab xis. Raws li qhov kev txiav txim ntawm daim teb hluav taws xob, cov xim pleev xim txheej yog lub cev qhuav dej, thiab cov xaim zaj duab xis yog adsorbed nyob rau saum npoo ntawm workpiece. , Thiab ua kom tiav tag nrho cov txheej txheem electrophoresis.

Qhov pretreatment ntawm txheej xim ntawm cov xim pleev xim rau lub rooj muag khoom tuaj yeem khaws nws qhov kev zoo nkauj thiab ntev nws lub neej kev pab. Yog li ntawd, txhawm rau txo peb cov nqi hauv txhua qhov, peb yuav tsum kam nrog nws ua li no.