Nhanho yekutanga mukushandiswa kwediatomite sefa yerubatsiro mutitanium kusefa ndeyekutanga-kuputira, izvo zvinoreva kuti isati yaitwa titanium kusefa, iyo diatomite sefa yerubatsiro inoiswa kune sefa yepakati, kureva, jira resefa. Iyo diatomite inogadzirirwa mukumiswa mune imwe chikamu (kazhinji 1∶8 ~ 1∶10) mutangi rekutanga-coating, uye ipapo kumiswa kunopomberwa mukati mesefa yekutsikirira yakazadzwa nemvura yakachena kana kusefa kuburikidza ne-pre-coating pombi, uye inodzokororwa kutenderera (inenge 12 ~ 30min) kusvika mvura inotenderera yachena.
Nenzira iyi, precoating yakagoverwa zvakafanana inoumbwa pane sefa yepakati (press cloth). Kugadzirira kumiswa, kazhinji shandisa mvura yakachena, asi zvakare inogona kushandisa yakajeka titanium fluid. Huwandu hwediatomite hunoshandiswa pre-coating kazhinji 800 ~ 1000g/m2, uye iyo yakanyanya kuyerera mwero wepre-coating haifanire kudarika 0.2m3/(m2? H). Precoating ndiyo yekutanga sefa mubhedha wetitanium fluid kusefa, uye hunhu hwayo hwakanangana nekubudirira kwesefa yekusefa.
Pre-coating inofanirawo kutarisisa kune zvinotevera pfungwa:
(1) Munguva yepamberi yekuputira, huwandu hwediatomite hunofanirwa kunge huri 1 ~ 3mm gobvu sefa layer. Tichitora ruzivo rwefekitari semuenzaniso, iyo 80m2 ndiro uye furemu sefa yekutsikisa yakashandiswa, uye 100kg yediatomite sefa yerubatsiro yaiwedzerwa nguva yega yega panguva yekuputira, iyo yaigona kusefa nguva dzose ye5d uye kuburitsa 17-18T yezvigadzirwa zvakapedzwa zuva rega rega.
(2) Pakushongedza, ndiro uye furemu sefa yekutsikirira ichazadzwa nemvura pachine nguva, uye mweya unoburitswa kubva kumusoro kwemuchina;
(3) pre-coating inofanira kuramba ichirova kutenderera. Nekuti keke yekusefa haina kuumbwa pakutanga, zvimwe zvimedu zvakanaka zvichapfuura nepamucheka wesefa uye kupinda mufiltrate. Kutenderera kunokwanisa kubata zvidimbu zvakasefa pamusoro pekeke resefa zvakare. Urefu hwenguva yekutenderera hunoenderana nehuwandu hwekujekesa hunodiwa kune filtrate.
Nhanho yechipiri ndeyekuwedzera kusefa. Kana iyo titanium mvura ine yakasimba uye colloid tsvina yakasefa, mushure mekunge pre-coating yaitwa, hazvifanirwe kuwedzera diatomite sefa rubatsiro kusefa zvakananga. Paunenge uchisefa iyo titanium fluid ine yakawedzera kusimba uye colloidal tsvina, kana pakusefa iyo titanium fluid ine yakakwira concentration uye viscosity, huwandu hwakakodzera hwediatomite sefa yerubatsiro inofanirwa kuwedzerwa kune yekusefa titanium fluid. Zvikasadaro, pamusoro peiyo pre-coating ichave yakafukidzwa yakasimba uye colloidal tsvina munguva pfupi, ichivharira chiteshi chesefa, kuitira kuti kudonhedza kudonha pamativi ese ekeke resefa kuchakwira nekukurumidza, uye kutenderera kwesefa kuchapfupikiswa zvakanyanya.
Nguva yekutumira: Kubvumbi-20-2022