Vim lawv cov qauv tsim tshwj xeeb thiab kev ua tau zoo, cov twj tso kua dej khib nyiab tuaj yeem ua haujlwm ruaj khov hauv cov dej hauv ib puag ncig uas muaj cov khoom siv, fibers, silt, thiab lwm yam impurities. Lawv daim ntawv thov nthuav dav hauv kev tsim vaj tsev hauv nroog, kev tsim khoom lag luam, kev tsim kho vaj tsev, thiab ntau qhov xwm txheej tshwj xeeb, ua rau lawv yog ib qho khoom siv tseem ceeb hauv kev tswj hwm dej niaj hnub thiab kev thauj mus los.
Hauv kev lag luam hauv nroog, cov twj tso kua dej khib nyiab yog qhov tseem ceeb ntawm cov kav dej. Kev sau cov dej nag hauv nroog, kev cuam tshuam cov kav dej sib txuas, thiab kev tshem cov dej khib nyiab thiab kev thauj mus los tag nrho tso siab rau cov twj tso kua dej pov tseg kom sai sai cov dej nag thiab cov dej phwj tuaj ntawm qhov qis - cov chaw pw, cov tso tsheb hlau luam hauv av, lossis cov qhov hauv av mus rau cov chaw kho mob lossis cov kab tawm, tiv thaiv dej nyab thiab tswj cov kav dej tsis muaj kev cuam tshuam. Thaum lub caij dej nyab lossis los nag hnyav, siab - cov twj tso kua dej khib nyiab tuaj yeem tshem tawm cov dej ntau ntxiv sai sai, ua kom muaj kev ua haujlwm ntawm txoj kev tsheb thiab cov chaw pej xeem.
Hauv kev lag luam, cov kev xav tau siab dua yog muab tso rau ntawm qhov kev tiv thaiv corrosion, hnav tsis kam, thiab cov khoom loj loj los ntawm cov twj tso kua dej pov tseg. Kev lag luam xws li tshuaj lom neeg, metallurgical, tshuaj, khoom noj khoom haus, thiab papermaking tsim cov dej khib nyiab uas muaj cov kua qaub, alkalis, roj, tshem tawm cov khib nyiab, los yog cov khoom siv siab thaum lub sij hawm tsim khoom. Cov twj tso kua dej tshwj xeeb tsis tu ncua thauj cov dej khib nyiab no mus rau cov chaw kho mob, ua tau raws li cov qauv kev tawm dag zog ib puag ncig thaum tiv thaiv cov pa phem los ntawm kev puas tsuaj rau cov khoom siv hauv qab.
Hauv kev siv lub tsev thiab kev siv pej xeem, cov twj siv dej khib nyiab tau siv dav hauv hauv qab daus, chaw nres tsheb hauv av, cov phiaj xwm tiv thaiv pej xeem, thiab cov dej khib nyiab nqa hauv cov tsev siab - nce siab. Txij li cov dej nqus dej tsis tuaj yeem npog qhov qis - thaj chaw dag, cov twj tso kua dej pov tseg tuaj yeem nqa cov dej phwj hauv tsev lossis cov dej khib nyiab mus rau qhov dej ntws loj, ua kom siv qhov chaw zoo tshaj plaws. Hauv cov tsev tos qhua, tsev kho mob, khw khw, thiab lwm qhov chaw, cov twj tso kua mis tswj tau tuaj yeem pib thiab nres raws li kev hloov pauv ntawm cov kua dej, txo qis kev siv hluav taws xob thiab txo cov kev cuam tshuam ntawm phau ntawv.
Kev ua liaj ua teb thiab ib puag ncig tshwj xeeb kuj poob rau hauv daim ntawv thov ntawm cov twj siv dej khib nyiab. Agricultural irrigation drainage yuav tsum tau tshem tawm cov dej sau thiab av nkos; kuv cov kua dej feem ntau cuam tshuam nrog siab -cov av nkos thiab pob zeb; thiab dej dredging yuav tsum tau kho cov kua dej uas muaj ntau cov organic thiab inorganic impurities. Tsis tas li ntawd, hauv kev ua haujlwm cawm thaum muaj xwm txheej ceev, cov chaw tawm ntug dej hiav txwv, tawg- qhov chaw pov thawj, lossis ib puag ncig tsis muaj zog, hydraulically lossis pneumatically tsav cov kav dej phwj tuaj muab cov kev ntseeg tau ntawm kev hloov cov kua.
Nrog rau kev nce qib hauv kev txawj ntse thiab lub zog-txuag thev naus laus zis, kev siv cov kav dej phwj tuaj tau nthuav dav rau kev ua haujlwm zoo dua thiab kev coj ua ntsuab. Lawv tsis tsuas yog ua haujlwm rau cov kav dej thiab cov dej phwj tuaj xwb tab sis kuj koom nrog hauv thaj chaw tshiab xws li dej rov siv dua, kho cov dej dub thiab tsw ntxhiab, thiab kev tsim kho hauv nroog sponge, muab kev txhawb nqa zoo rau kev tsim kom muaj kev tswj hwm dej nyab xeeb.