Cap nhat thang 4 nam 2026
Hoa chat xu ly nuoc la nhung vat tu tieu hao thiet yeu giup bao ve mang loc dat tien, toi uu hoa hieu suat he thong va dam bao chat luong nuoc san pham. Lua chon dung hoa chat va dinh luong chinh xac co the keo dai tuoi tho mang tu 50–100%, dong thoi ngan ngua cac lan ngung hoat dong ngoai ke hoach ton kem. Huong dan nay bao gom cac loai hoa chat chinh cho he thong tham thau nguoc (RO), khu muoi va cac ung dung xu ly nuoc noi chung.
Tong Quan Cac Nhom Hoa Chat
| Loai hoa chat | Muc dich | Thoi diem su dung | Lieu luong dien hinh |
|---|---|---|---|
| Chat chong cau can | Ngan ngua cau can khoang tren mang | Lien tuc (dinh luong vao nuoc cap) | 2–5 ppm |
| Chat tay rua kiem | Loai bo cau ban huu co va mang sinh hoc | Ve sinh CIP (moi 1–3 thang) | pH 11–12 |
| Chat tay rua axit | Loai bo cau can khoang (CaCO3, CaSO4, silica) | Ve sinh CIP (moi 1–3 thang) | pH 2–3 |
| Chat diet khuan / chat oxy hoa | Kiem soat su phat trien sinh hoc | Xu ly soc dinh ky | Thay doi theo san pham |
| Khu clo (SMBS) | Loai bo clo tu do truoc khi vao RO | Lien tuc (neu nuoc cap co clo) | 3 ppm cho moi 1 ppm Cl2 |
| Dieu chinh pH | Toi uu hieu suat RO va ngan ngua cau can | Lien tuc | pH muc tieu 6.5–7.5 |
| Chat keo tu / chat tao bong | Loai bo hat keo trong tien xu ly | Lien tuc (nguon nuoc do duc cao) | 5–50 ppm |
| Soda ash (Na2CO3) | Tang pH va do kiem cua nuoc co tinh axit | Lien tuc hoac theo me | Tuy theo thanh phan hoa hoc cua nuoc |
Chat Chong Cau Can: Bao Ve Mang Loc Cua Ban
Chat chong cau can la hoa chat hieu qua chi phi nhat trong he thong tham thau nguoc. Voi lieu luong 2–5 ppm, mot thung chat chong cau can tri gia $200 bao ve mang loc co gia tri $5,000–$20,000 trong nhieu thang. Neu khong co chat chong cau can, cau can khoang (canxi cacbonat, canxi sunfat, bari sunfat, silica) hinh thanh tren be mat mang trong vai ngay, lam giam hieu suat khong the phuc hoi.
Cach Chon Chat Chong Cau Can
- Lay ket qua phan tich nuoc — Ban can toi thieu cac gia tri TDS, canxi, magie, bari, stronti, sunfat, silica, sat va pH
- Chay phan mem mo phong — ROSA (FILMTEC), IMS Design (Hydranautics) hoac cong cu tinh lieu luong cua nha san xuat chat chong cau can
- Phu hop voi kha nang cau can cua nguon nuoc — Chat chong cau can tieu chuan xu ly CaCO3 va CaSO4. Nuoc co ham luong silica cao can cong thuc chuyen dung cho silica. Nuoc co ham luong sat cao can cong thuc co chat phan tan sat.
Quy Trinh CIP (Ve Sinh Tai Cho)
Ve sinh CIP phuc hoi hieu suat mang khi cau ban gay giam luu luong hoac tang do lot muoi. Quy trinh CIP dien hinh:
- Ve sinh pH thap (axit) — Tuan hoan dung dich axit citric hoac HCl o pH 2–3 trong 30–60 phut. Loai bo canxi cacbonat, oxit kim loai va cau can vo co.
- Rua — Rua bang nuoc tham thau de loai bo axit.
- Ve sinh pH cao (kiem) — Tuan hoan dung dich NaOH + chat hoat dong be mat o pH 11–12 trong 30–60 phut. Loai bo cau ban huu co, mang sinh hoc va vat lieu keo.
- Rua cuoi — Rua bang nuoc tham thau cho den khi pH tro lai binh thuong.
- Ngam (tuy chon) — Doi voi cau ban nghiem trong, ngam mang trong dung dich ve sinh 4–12 gio truoc khi rua cuoi.
Soda Ash cho Xu Ly Nuoc
Soda ash (natri cacbonat, Na2CO3) duoc su dung rong rai de tang pH va do kiem trong cac nguon nuoc co tinh axit. Cac ung dung pho bien bao gom:
- Dieu chinh nuoc gieng co pH thap de ngan ngua an mon duong ong
- Tang do kiem de can bang Chi So Bao Hoa Langelier (LSI)
- Tai khoang hoa sau xu ly nuoc tham thau RO
- Lam mem nuoc bang phuong phap ket tua (quy trinh voi-soda)
Toc do dinh luong phu thuoc vao thanh phan hoa hoc cua nguon nuoc. Diem khoi dau dien hinh: 50–100 mg/L soda ash tang pH khoang 0.5–1.0 don vi trong nuoc co do kiem thap.
Hydro Peroxit cho Xu Ly Nuoc
Dung dich hydro peroxit 7% duoc su dung cho oxy hoa va khu trung trong cac ung dung xu ly nuoc:
- Oxy hoa sat va mangan (chuyen doi Fe2+ hoa tan thanh Fe3+ co the loc)
- Loai bo hydro sunfua (khu mui trung thoi)
- Kiem soat mang sinh hoc trong he thong phan phoi
- Khu trung sau CIP cho mang RO (giai phap thay the khong dung clo)
Xem tat ca hoa chat xu ly nuoc tai ForeverPure →
Cau Hoi Thuong Gap
Nen ve sinh mang RO bao lau mot lan?
Tan suat ve sinh CIP phu thuoc vao chat luong nuoc cap va hieu qua tien xu ly. Hau het cac he thong thuong mai can CIP moi 1–3 thang. Ve sinh khi luu luong nuoc tham thau chuan hoa giam 10–15% hoac do lot muoi tang 10% so voi gia tri co so. Doi qua lau se khien viec loai bo cau ban kho khan hon.
Co the dung nuoc Javel gia dung de ve sinh mang RO khong?
Khong. Clo (natri hypoclorit/nuoc Javel) lam hong vinh vien mang RO polyamide ngay ca o nong do thap (0.1 ppm). Chi su dung hoa chat ve sinh tuong thich voi mang. Neu nuoc cap chua clo, phai loai bo bang than hoat tinh hoac natri metabisulfit (SMBS) truoc khi vao RO.
Su khac biet giua chat chong cau can va lam mem nuoc la gi?
Chat chong cau can la phu gia hoa hoc (2–5 ppm) uc che su hinh thanh tinh the, giu cac khoang chat hoa tan trong dong nuoc co dac. No re hon nhieu so voi lam mem nuoc. Thiet bi lam mem nuoc loai bo do cung vat ly bang trao doi ion va duoc su dung khi do cung vuot qua gioi han nuoc cap RO hoac khi can nuoc mem cho muc dich khac (lo hoi, giat la). Doi voi hau het cac ung dung RO, chi can chat chong cau can la du.
Ban can hoa chat xu ly nuoc? Yeu cau bao gia chat chong cau can, chat tay rua va hoa chat → hoac goi +1-408-969-2688.