{"id":1791,"date":"2026-03-17T00:34:44","date_gmt":"2026-03-16T17:34:44","guid":{"rendered":"https:\/\/inoxcuongthinh.com\/chon-inox-cho-he-thong-xu-ly-khi-thai-nuoc-thai-cong-nghiep\/"},"modified":"2026-03-17T00:34:44","modified_gmt":"2026-03-16T17:34:44","slug":"chon-inox-cho-he-thong-xu-ly-khi-thai-nuoc-thai-cong-nghiep","status":"publish","type":"post","link":"https:\/\/inoxcuongthinh.com\/chon-inox-cho-he-thong-xu-ly-khi-thai-nuoc-thai-cong-nghiep\/","title":{"rendered":"Ch\u1ecdn inox cho h\u1ec7 th\u1ed1ng x\u1eed l\u00fd kh\u00ed th\u1ea3i &#038; n\u01b0\u1edbc th\u1ea3i c\u00f4ng nghi\u1ec7p"},"content":{"rendered":"<div class=\"custom-toc\">\n<h3>N\u1ed9i dung ch\u00ednh<\/h3>\n<ul>\n<li><a href=\"#toc-0-dieu-kien-an-mon-dien-hinh-trong-xu-ly-khi-va-nuoc\">\u0110i\u1ec1u ki\u1ec7n \u0103n m\u00f2n \u0111i\u1ec3n h\u00ecnh trong x\u1eed l\u00fd kh\u00ed v\u00e0 n\u01b0\u1edbc th\u1ea3i<\/a><\/li>\n<li><a href=\"#toc-1-nguyen-tac-chon-mac-inox-dung-pren-va-khop-voi-moi\">Nguy\u00ean t\u1eafc ch\u1ecdn m\u00e1c inox: d\u00f9ng PREN v\u00e0 \u201ckh\u1edbp\u201d v\u1edbi m\u00f4i tr\u01b0\u1eddng<\/a><\/li>\n<li><a href=\"#toc-2-khuyen-nghi-nhanh-theo-tung-thiet-bi\">Khuy\u1ebfn ngh\u1ecb nhanh theo t\u1eebng thi\u1ebft b\u1ecb<\/a><\/li>\n<li><a href=\"#toc-3-thiet-ke-va-che-tao-inox-de-ben-lau\">Thi\u1ebft k\u1ebf v\u00e0 ch\u1ebf t\u1ea1o inox \u0111\u1ec3 b\u1ec1n l\u00e2u<\/a><\/li>\n<li><a href=\"#toc-4-chi-phi-vong-doi-lcc-vi-sao-inox-re-hon-ve-lau-dai\">Chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCC): v\u00ec sao inox \u201cr\u1ebb\u201d h\u01a1n v\u1ec1 l\u00e2u d\u00e0i<\/a><\/li>\n<li><a href=\"#toc-5-quy-chuan-viet-nam-va-thong-so-van-hanh-huu-ich\">Quy chu\u1ea9n Vi\u1ec7t Nam v\u00e0 th\u00f4ng s\u1ed1 v\u1eadn h\u00e0nh h\u1eefu \u00edch<\/a><\/li>\n<li><a href=\"#toc-6-case-study-rut-gon-dieu-kien-ven-bien\">Case study r\u00fat g\u1ecdn (\u0111i\u1ec1u ki\u1ec7n ven bi\u1ec3n)<\/a><\/li>\n<li><a href=\"#toc-7-dang-hang-inox-phu-hop-cho-xu-ly-khinuoc-thai-san-\">D\u1ea1ng h\u00e0ng inox ph\u00f9 h\u1ee3p cho x\u1eed l\u00fd kh\u00ed\/n\u01b0\u1edbc th\u1ea3i (s\u1eb5n c\u00f3 t\u1ea1i H\u00e0 N\u1ed9i)<\/a><\/li>\n<li><a href=\"#toc-8-quy-trinh-tu-van-chon-mac-tai-inox-cuong-thinh\">Quy tr\u00ecnh t\u01b0 v\u1ea5n ch\u1ecdn m\u00e1c t\u1ea1i Inox C\u01b0\u1eddng Th\u1ecbnh<\/a><\/li>\n<li><a href=\"#toc-9-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/a><\/li>\n<li><a href=\"#toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/a><\/li>\n<\/ul>\n<\/div>\n<p>Trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p n\u1eb7ng (nhi\u1ec7t \u0111i\u1ec7n, h\u00f3a ch\u1ea5t, xi m\u0103ng, \u0111\u1ed1t r\u00e1c\u2026), h\u1ec7 th\u1ed1ng x\u1eed l\u00fd kh\u00ed th\u1ea3i v\u00e0 n\u01b0\u1edbc th\u1ea3i quy\u1ebft \u0111\u1ecbnh kh\u1ea3 n\u0103ng tu\u00e2n th\u1ee7 QCVN c\u0169ng nh\u01b0 \u0111\u1ed9 tin c\u1eady v\u1eadn h\u00e0nh. Inox (th\u00e9p kh\u00f4ng g\u1ec9) l\u00e0 v\u1eadt li\u1ec7u c\u1ed1t l\u00f5i \u0111\u1ec3 ch\u1ed1ng \u0103n m\u00f2n, gi\u1ea3m d\u1eebng m\u00e1y v\u00e0 t\u1ed1i \u01b0u t\u1ed5ng chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCC). B\u00e0i vi\u1ebft n\u00e0y cung c\u1ea5p h\u01b0\u1edbng d\u1eabn ch\u1ecdn m\u00e1c inox, l\u01b0u \u00fd thi\u1ebft k\u1ebf \u2013 ch\u1ebf t\u1ea1o \u2013 b\u1ea3o tr\u00ec, c\u00f9ng khuy\u1ebfn ngh\u1ecb th\u1ef1c t\u1ebf cho m\u00f4i tr\u01b0\u1eddng Vi\u1ec7t Nam.<\/p>\n<h2 id=\"toc-0-dieu-kien-an-mon-dien-hinh-trong-xu-ly-khi-va-nuoc\">\u0110i\u1ec1u ki\u1ec7n \u0103n m\u00f2n \u0111i\u1ec3n h\u00ecnh trong x\u1eed l\u00fd kh\u00ed v\u00e0 n\u01b0\u1edbc th\u1ea3i<\/h2>\n<p>&#8211; Kh\u00ed th\u1ea3i v\u00e0 FGD \u01b0\u1edbt: SOx\/NOx, HCl\/HF, s\u01b0\u01a1ng axit, b\u00f9n \u0111\u00e1 v\u00f4i\/gypsum pH 4\u20136, Cl\u2212 5.000\u201360.000 mg\/L, T 40\u201370\u00b0C; v\u00f9ng \u0111i\u1ec3m s\u01b0\u01a1ng axit H2SO4 120\u2013160\u00b0C.<br \/>\n&#8211; \u1ed0ng kh\u00f3i, \u1ed1ng d\u1eabn: ng\u01b0ng t\u1ee5 axit, CUI (\u0103n m\u00f2n d\u01b0\u1edbi l\u1edbp c\u00e1ch nhi\u1ec7t), chu k\u1ef3 \u1ea9m\/kh\u00f4, m\u01b0a mu\u1ed1i t\u1ea1i khu v\u1ef1c ven bi\u1ec3n.<br \/>\n&#8211; N\u01b0\u1edbc th\u1ea3i c\u00f4ng nghi\u1ec7p: Cl\u2212 dao \u0111\u1ed9ng 200\u2013>20.000 mg\/L, H2S\/NH3, hypochlorite trong kh\u1eed tr\u00f9ng, ch\u1ea5t r\u1eafn l\u01a1 l\u1eedng g\u00e2y m\u00e0i m\u00f2n, MIC (\u0103n m\u00f2n do vi sinh) \u1edf v\u00f9ng k\u1ef5 kh\u00ed.<br \/>\n&#8211; C\u01a1 ch\u1ebf ch\u00ednh: r\u1ed7 (pitting), \u0103n k\u1ebd (crevice), SCC do clorua \u1edf T>60\u00b0C, \u0103n m\u00f2n li\u00ean h\u1ea1t do nh\u1ea1y c\u1ea3m h\u00f3a v\u00f9ng \u1ea3nh h\u01b0\u1edfng nhi\u1ec7t khi h\u00e0n, m\u00e0i m\u00f2n\u2013\u0103n m\u00f2n k\u1ebft h\u1ee3p.<\/p>\n<h2 id=\"toc-1-nguyen-tac-chon-mac-inox-dung-pren-va-khop-voi-moi\">Nguy\u00ean t\u1eafc ch\u1ecdn m\u00e1c inox: d\u00f9ng PREN v\u00e0 \u201ckh\u1edbp\u201d v\u1edbi m\u00f4i tr\u01b0\u1eddng<\/h2>\n<p>&#8211; Ch\u1ec9 s\u1ed1 PREN \u2248 %Cr + 3,3\u00d7%Mo + 16\u00d7%N; PREN c\u00e0ng cao, kh\u00e1ng r\u1ed7\/\u0103n k\u1ebd do Cl\u2212 c\u00e0ng t\u1ed1t.<br \/>\n  &#8211; 304L (PREN ~18) \u2192 M\u00f4i tr\u01b0\u1eddng s\u1ea1ch, Cl\u2212 th\u1ea5p.<br \/>\n  &#8211; 316L (PREN ~24) \u2192 N\u01b0\u1edbc th\u1ea3i \u0111\u00f4 th\u1ecb\/nh\u1eb9, Cl\u2212 trung b\u00ecnh, c\u00f3 \u00edt Cl2 d\u01b0.<br \/>\n  &#8211; 904L, 317L (PREN ~30\u201335) \u2192 Axit lo\u00e3ng\/Cl\u2212 cao h\u01a1n, n\u01b0\u1edbc ng\u01b0ng s\u01b0\u01a1ng axit.<br \/>\n  &#8211; Duplex 2205 (1.4462, PREN ~34\u201336) \u2192 Cl\u2212 cao, T \u0111\u1ebfn ~70\u00b0C, SCC t\u1ed1t h\u01a1n austenitic.<br \/>\n  &#8211; Super duplex 2507 (PREN ~41\u201343) ho\u1eb7c 254SMO (PREN ~43\u201345) \u2192 Cl\u2212 r\u1ea5t cao, n\u01b0\u1edbc bi\u1ec3n, hypochlorite.<br \/>\n&#8211; \u01afu ti\u00ean \u201cL\u201d (low carbon) \u0111\u1ec3 gi\u1ea3m nh\u1ea1y c\u1ea3m h\u00f3a khi h\u00e0n; v\u1edbi duplex, ki\u1ec3m so\u00e1t t\u1ef7 l\u1ec7 ferit\/austenit.<\/p>\n<h3>Kh\u00ed th\u1ea3i\/FGD: m\u00e1c khuy\u1ebfn ngh\u1ecb theo h\u1ea1ng m\u1ee5c<\/h3>\n<p>&#8211; Bu\u1ed3ng h\u1ea5p th\u1ee5 FGD \u01b0\u1edbt, \u1ed1ng tu\u1ea7n ho\u00e0n b\u00f9n, b\u1ec3 l\u1eafng gypsum:<br \/>\n  &#8211; Duplex 2205 l\u00e0 l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn nh\u1edd kh\u00e1ng Cl\u2212, x\u00f3i m\u00f2n\u2013\u0103n m\u00f2n v\u00e0 SCC; thay th\u1ebf cao su-l\u00f3t tr\u00ean th\u00e9p carbon v\u1edbi tu\u1ed5i th\u1ecd v\u01b0\u1ee3t tr\u1ed9i.<br \/>\n  &#8211; V\u1edbi Cl\u2212 c\u1ef1c cao ho\u1eb7c n\u01b0\u1edbc bi\u1ec3n: 2507\/254SMO cho c\u00e1c v\u1ecb tr\u00ed n\u00f3ng\/\u0111\u1ed9ng l\u1ef1c d\u00f2ng cao.<br \/>\n&#8211; B\u1ed9 kh\u1eed s\u01b0\u01a1ng, v\u00f2i phun, \u1ed1ng g\u00f3p:<br \/>\n  &#8211; 316L\/904L \u0111\u1ee7 cho v\u00f9ng \u00edt m\u00e0i m\u00f2n; ch\u1ecdn 2205 n\u1ebfu Cl\u2212>10.000 mg\/L v\u00e0 d\u1eebng m\u00e1y kh\u00f4ng th\u01b0\u1eddng xuy\u00ean r\u1eeda \u01b0\u1edbt.<br \/>\n&#8211; \u1ed0ng kh\u00f3i \u01b0\u1edbt\/\u0111\u01b0\u1eddng \u1ed1ng kh\u00ed l\u1ea1nh (nguy c\u01a1 s\u01b0\u01a1ng axit):<br \/>\n  &#8211; 904L\/2205 cho v\u00f9ng ng\u01b0ng t\u1ee5 axit; b\u1ed5 sung h\u1ec7 r\u1eeda \u01b0\u1edbt duy tr\u00ec b\u1ec1 m\u1eb7t \u201c\u01b0\u1edbt\u201d \u0111\u1ec3 tr\u00e1nh \u0111\u1eb7c axit.<br \/>\n&#8211; \u1ed0ng d\u1eabn kh\u00ed n\u00f3ng, g\u1ea7n \u0111i\u1ec3m s\u01b0\u01a1ng axit 120\u2013160\u00b0C:<br \/>\n  &#8211; \u01afu ti\u00ean h\u1ee3p kim Mo cao (904L) ho\u1eb7c gi\u1ea3i ph\u00e1p l\u00f3t FRP\/ti g\u1ed1m; 316L th\u01b0\u1eddng kh\u00f4ng \u0111\u1ee7 n\u1ebfu kh\u00f4ng c\u00f3 r\u1eeda \u01b0\u1edbt v\u00e0 ki\u1ec3m so\u00e1t nhi\u1ec7t.<\/p>\n<h3>N\u01b0\u1edbc th\u1ea3i: m\u00e1c khuy\u1ebfn ngh\u1ecb theo c\u00f4ng \u0111o\u1ea1n<\/h3>\n<p>&#8211; Song ch\u1eafn r\u00e1c, k\u00eanh d\u1eabn, lan can, b\u1ec3 hi\u1ebfu\/k\u1ef5 kh\u00ed, b\u1ec3 l\u1eafng:<br \/>\n  &#8211; 304L trong n\u01b0\u1edbc th\u1ea3i \u0111\u00f4 th\u1ecb\/nh\u1eb9 v\u00e0 xa bi\u1ec3n; 316L an to\u00e0n h\u01a1n t\u1ea1i mi\u1ec1n ven bi\u1ec3n\/h\u00f3a ch\u1ea5t nh\u1eb9.<br \/>\n&#8211; B\u1ec3 ti\u1ebfp x\u00fac kh\u1eed tr\u00f9ng (Cl2\/NaOCl), th\u00e1p h\u1ea5p th\u1ee5 kh\u00ed \u0111\u1ed9c:<br \/>\n  &#8211; 316L cho Cl2 d\u01b0 th\u1ea5p; 2205 ho\u1eb7c 254SMO khi ti\u1ebfp x\u00fac hypochlorite \u0111\u1eadm \u0111\u1eb7c\/ti\u1ebfp x\u00fac li\u00ean t\u1ee5c.<br \/>\n&#8211; H\u1ec7 MBR\/UF\/RO, skid b\u01a1m, \u1ed1ng ch\u1ea3y xi\u1ebft:<br \/>\n  &#8211; 316L\/2205; d\u00f9ng 2507\/254SMO v\u1edbi n\u01b0\u1edbc bi\u1ec3n ho\u1eb7c TDS\/clorua r\u1ea5t cao.<br \/>\n&#8211; \u0110\u01b0\u1eddng \u1ed1ng ch\u00f4n\/ng\u1ea7m, m\u1ed1i n\u1ed1i gi\u1eefa inox\u2013th\u00e9p carbon:<br \/>\n  &#8211; C\u00e1ch \u0111i\u1ec7n ch\u1ed1ng \u0103n m\u00f2n \u0111i\u1ec7n h\u00f3a, d\u00f9ng bul\u00f4ng v\u00e0 ph\u1ee5 ki\u1ec7n \u0111\u1ed3ng c\u1ea5p ho\u1eb7c cao h\u01a1n (v\u00ed d\u1ee5 fastener A4-80\/duplex).<\/p>\n<h2 id=\"toc-2-khuyen-nghi-nhanh-theo-tung-thiet-bi\">Khuy\u1ebfn ngh\u1ecb nhanh theo t\u1eebng thi\u1ebft b\u1ecb<\/h2>\n<p>&#8211; Bu\u1ed3ng h\u1ea5p th\u1ee5 FGD \u01b0\u1edbt: 2205 (t\u1ed1i thi\u1ec3u), 2507\/254SMO n\u1ebfu Cl\u2212 r\u1ea5t cao.<br \/>\n&#8211; \u1ed0ng tu\u1ea7n ho\u00e0n b\u00f9n\/gypsum: 2205; l\u00f3t g\u1ed1m \u1edf \u0111o\u1ea1n m\u00e0i m\u00f2n cao.<br \/>\n&#8211; B\u1ed9 kh\u1eed s\u01b0\u01a1ng: 316L\/904L ho\u1eb7c 2205 t\u00f9y Cl\u2212 v\u00e0 l\u1ecbch r\u1eeda.<br \/>\n&#8211; \u1ed0ng kh\u00f3i \u01b0\u1edbt\/\u1ed1ng d\u1eabn v\u00f9ng l\u1ea1nh: 904L\/2205 + r\u1eeda \u01b0\u1edbt ch\u1ee7 \u0111\u1ed9ng.<br \/>\n&#8211; B\u1ec3 hi\u1ebfu kh\u00ed\/k\u1ef5 kh\u00ed, lan can, thang: 304L\/316L (\u01b0u ti\u00ean 316L g\u1ea7n bi\u1ec3n).<br \/>\n&#8211; Kh\u1eed tr\u00f9ng b\u1eb1ng hypochlorite: 2205 ho\u1eb7c 254SMO.<br \/>\n&#8211; Skid RO\/UF\/b\u01a1m: 316L; n\u01b0\u1edbc bi\u1ec3n \u2192 2205\/2507.<br \/>\n&#8211; Fastener, m\u1ed1i n\u1ed1i: c\u00f9ng ho\u1eb7c cao h\u01a1n c\u1ea5p m\u00e1c n\u1ec1n; gio\u0103ng PTFE\/EPDM t\u00f9y h\u00f3a ch\u1ea5t.<\/p>\n<h2 id=\"toc-3-thiet-ke-va-che-tao-inox-de-ben-lau\">Thi\u1ebft k\u1ebf v\u00e0 ch\u1ebf t\u1ea1o inox \u0111\u1ec3 b\u1ec1n l\u00e2u<\/h2>\n<h3>H\u00e0n, t\u1ea9y m\u1ed1i h\u00e0n v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a<\/h3>\n<p>&#8211; D\u00f9ng v\u1eadt li\u1ec7u h\u00e0n \u0111\u1ed3ng c\u1ea5p (ER2209 cho 2205, ER316L cho 316L\u2026).<br \/>\n&#8211; Lo\u1ea1i b\u1ecf m\u00e0u ram b\u1eb1ng t\u1ea9y axit (ASTM A380\/A967) ho\u1eb7c m\u00e0i c\u01a1, sau \u0111\u00f3 th\u1ee5 \u0111\u1ed9ng h\u00f3a b\u1eb1ng axit nitric\/citric \u0111\u1ec3 t\u00e1i t\u1ea1o l\u1edbp Cr2O3.<br \/>\n&#8211; Tr\u00e1nh nhi\u1ec7t \u0111\u1ea7u v\u00e0o qu\u00e1 cao; v\u1edbi duplex, ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 gi\u1eefa l\u1edbp \u0111\u1ec3 gi\u1eef ferit ~30\u201370% (theo IMOA).<\/p>\n<h3>Thi\u1ebft k\u1ebf ch\u1ed1ng k\u1ebd v\u00e0 \u0111\u1ecdng n\u01b0\u1edbc<\/h3>\n<p>&#8211; Tr\u00e1nh khe h\u1eb9p, m\u1eb7t b\u00edch kh\u00f4ng k\u00edn; \u01b0u ti\u00ean h\u00e0n k\u00edn ho\u00e0n to\u00e0n; b\u1ea3o \u0111\u1ea3m tho\u00e1t n\u01b0\u1edbc, gi\u1ea3m \u0111i\u1ec3m t\u00f9 \u0111\u1ecdng.<br \/>\n&#8211; B\u1ec1 m\u1eb7t ho\u00e0n thi\u1ec7n: No.1 (t\u1ea9y b\u1ec1 m\u1eb7t c\u00e1n n\u00f3ng) ho\u1eb7c 2B l\u00e0 \u0111\u1ee7; v\u00f9ng Cl\u2212 cao n\u00ean gi\u1ea3m \u0111\u1ed9 nh\u00e1m b\u1ec1 m\u1eb7t.<\/p>\n<h3>Tr\u00e1nh nhi\u1ec5m s\u1eaft v\u00e0 CUI<\/h3>\n<p>&#8211; Kh\u00f4ng d\u00f9ng b\u00e0n ch\u1ea3i\/th\u00e9p h\u1ea1t m\u00e0i carbon; b\u1ea3o qu\u1ea3n ri\u00eang inox.<br \/>\n&#8211; C\u00e1ch nhi\u1ec7t kh\u00f4ng ch\u1ee9a clorua h\u00f2a tan; b\u1ecbt k\u00edn ch\u1ed1ng th\u1ea5m \u0111\u1ec3 ng\u0103n CUI \u1edf \u1ed1ng\/\u1ed1ng kh\u00f3i.<\/p>\n<h3>T\u01b0\u01a1ng th\u00edch gio\u0103ng\/bul\u00f4ng\/ph\u1ee5 ki\u1ec7n<\/h3>\n<p>&#8211; Gio\u0103ng: PTFE\/expanded PTFE cho axit\/ki\u1ec1m; EPDM\/NBR t\u00f9y m\u00f4i ch\u1ea5t.<br \/>\n&#8211; Bul\u00f4ng: ISO 3506 A4-70\/A4-80 (316) ho\u1eb7c duplex 1.4462 cho chi ti\u1ebft ch\u1ecbu l\u1ef1c\/\u0103n m\u00f2n.<\/p>\n<h2 id=\"toc-4-chi-phi-vong-doi-lcc-vi-sao-inox-re-hon-ve-lau-dai\">Chi ph\u00ed v\u00f2ng \u0111\u1eddi (LCC): v\u00ec sao inox \u201cr\u1ebb\u201d h\u01a1n v\u1ec1 l\u00e2u d\u00e0i<\/h2>\n<p>V\u00ed d\u1ee5 \u0111i\u1ec3n h\u00ecnh FGD \u01b0\u1edbt 5.000 m\u00b3\/h:<br \/>\n&#8211; Ph\u01b0\u01a1ng \u00e1n th\u00e9p carbon l\u00f3t cao su: CAPEX th\u1ea5p h\u01a1n ~25\u201330%, nh\u01b0ng ph\u1ea3i \u0111\u1ea1i tu\/l\u00f3t l\u1ea1i 3\u20135 n\u0103m\/l\u1ea7n, r\u1ee7i ro bong l\u00f3t, d\u1eebng m\u00e1y d\u00e0i ng\u00e0y.<br \/>\n&#8211; Ph\u01b0\u01a1ng \u00e1n inox 2205: CAPEX cao h\u01a1n ban \u0111\u1ea7u, nh\u01b0ng tu\u1ed5i th\u1ecd 15\u201325 n\u0103m v\u1edbi b\u1ea3o tr\u00ec t\u1ed1i thi\u1ec3u; gi\u1ea3m d\u1eebng m\u00e1y v\u00e0 r\u1ee7i ro s\u1ef1 c\u1ed1.<br \/>\nKhi quy \u0111\u1ed5i NPV 15 n\u0103m v\u1edbi chi ph\u00ed d\u1eebng m\u00e1y v\u00e0 b\u1ea3o tr\u00ec, inox 2205 th\u01b0\u1eddng ti\u1ebft ki\u1ec7m 10\u201330% t\u1ed5ng LCC so v\u1edbi l\u00f3t cao su\/FRP (tham kh\u1ea3o Nickel Institute, Outokumpu).<\/p>\n<h2 id=\"toc-5-quy-chuan-viet-nam-va-thong-so-van-hanh-huu-ich\">Quy chu\u1ea9n Vi\u1ec7t Nam v\u00e0 th\u00f4ng s\u1ed1 v\u1eadn h\u00e0nh h\u1eefu \u00edch<\/h2>\n<p>&#8211; Tu\u00e2n th\u1ee7 QCVN 19:2009\/BTNMT (kh\u00ed th\u1ea3i c\u00f4ng nghi\u1ec7p) v\u00e0 QCVN 40:2011\/BTNMT (n\u01b0\u1edbc th\u1ea3i c\u00f4ng nghi\u1ec7p).<br \/>\n&#8211; Th\u1ef1c t\u1ebf v\u1eadn h\u00e0nh:<br \/>\n  &#8211; Duy tr\u00ec r\u1eeda \u01b0\u1edbt \u1ed1ng kh\u00f3i\/\u0111\u01b0\u1eddng kh\u00ed l\u1ea1nh \u0111\u1ec3 h\u1ea1n ch\u1ebf c\u00f4 \u0111\u1eb7c H2SO4.<br \/>\n  &#8211; Ki\u1ec3m so\u00e1t Cl\u2212 b\u00f9n FGD v\u00e0 pH 4\u20136; r\u1eeda b\u1ed9 kh\u1eed s\u01b0\u01a1ng \u0111\u1ecbnh k\u1ef3.<br \/>\n  &#8211; Tr\u00e1nh l\u01b0u gi\u1eef l\u00e2u dung d\u1ecbch hypochlorite trong b\u1ed3n inox austenitic; n\u1ebfu b\u1eaft bu\u1ed9c, ch\u1ecdn 2205\/254SMO.<\/p>\n<h2 id=\"toc-6-case-study-rut-gon-dieu-kien-ven-bien\">Case study r\u00fat g\u1ecdn (\u0111i\u1ec1u ki\u1ec7n ven bi\u1ec3n)<\/h2>\n<p>B\u00e0i to\u00e1n: FGD \u01b0\u1edbt cho l\u00f2 h\u01a1i 150 MW, d\u00f9ng n\u01b0\u1edbc bi\u1ec3n l\u00e0m make-up, Cl\u2212 25.000\u201330.000 mg\/L, T 55\u201365\u00b0C.<br \/>\n&#8211; L\u1ef1a ch\u1ecdn: Th\u00e2n h\u1ea5p th\u1ee5, \u1ed1ng tu\u1ea7n ho\u00e0n v\u00e0 b\u1ec3 gypsum b\u1eb1ng duplex 2205 d\u00e0y 6\u20138 mm; b\u1ed9 kh\u1eed s\u01b0\u01a1ng 2205; c\u00e1c ph\u1ee5 ki\u1ec7n \u00edt kh\u1eafc nghi\u1ec7t d\u00f9ng 316L.<br \/>\n&#8211; K\u1ebft qu\u1ea3: Sau 6 n\u0103m v\u1eadn h\u00e0nh, ki\u1ec3m tra si\u00eau \u00e2m cho th\u1ea5y suy gi\u1ea3m b\u1ec1 d\u00e0y <0,1 mm; kh\u00f4ng ph\u00e1t hi\u1ec7n pitting \u0111\u00e1ng k\u1ec3. Th\u1eddi gian d\u1eebng b\u1ea3o tr\u00ec gi\u1ea3m >20% so v\u1edbi ph\u01b0\u01a1ng \u00e1n l\u00f3t cao su tr\u01b0\u1edbc \u0111\u00e2y.<\/p>\n<h2 id=\"toc-7-dang-hang-inox-phu-hop-cho-xu-ly-khinuoc-thai-san-\">D\u1ea1ng h\u00e0ng inox ph\u00f9 h\u1ee3p cho x\u1eed l\u00fd kh\u00ed\/n\u01b0\u1edbc th\u1ea3i (s\u1eb5n c\u00f3 t\u1ea1i H\u00e0 N\u1ed9i)<\/h2>\n<p>&#8211; T\u1ea5m\/cu\u1ed9n: ASTM A240 \u2013 304L\/316L\/904L\/2205\/2507 (No.1, 2B), \u0111\u1ed9 d\u00e0y 2\u201320 mm.<br \/>\n&#8211; \u1ed0ng h\u00e0n\/\u0111\u00fac: ASTM A312 \u2013 Sch10\/40, DN25\u2013DN600; co, t\u00ea, b\u00edch theo ASME B16.5\/B16.9.<br \/>\n&#8211; Thanh la, h\u00ecnh U\/I\/L, l\u01b0\u1edbi s\u00e0n, lan can: 304L\/316L.<br \/>\n&#8211; Ph\u1ee5 ki\u1ec7n v\u00e0 v\u1eadt li\u1ec7u h\u00e0n: d\u00e2y\/que ER316L, ER2209; bul\u00f4ng A4-70\/A4-80, duplex.<\/p>\n<h2 id=\"toc-8-quy-trinh-tu-van-chon-mac-tai-inox-cuong-thinh\">Quy tr\u00ecnh t\u01b0 v\u1ea5n ch\u1ecdn m\u00e1c t\u1ea1i Inox C\u01b0\u1eddng Th\u1ecbnh<\/h2>\n<p>&#8211; Thu th\u1eadp d\u1eef li\u1ec7u m\u00f4i tr\u01b0\u1eddng: pH, Cl\u2212, T, h\u00f3a ch\u1ea5t, v\u1eadn t\u1ed1c d\u00f2ng, chu k\u1ef3 r\u1eeda.<br \/>\n&#8211; \u0110\u00e1nh gi\u00e1 r\u1ee7i ro \u0103n m\u00f2n (pitting, crevice, SCC, m\u00e0i m\u00f2n).<br \/>\n&#8211; L\u1eadp shortlist m\u00e1c theo PREN v\u00e0 kinh nghi\u1ec7m \u1ee9ng d\u1ee5ng.<br \/>\n&#8211; So s\u00e1nh LCC v\u00e0 t\u00ednh s\u1eb5n c\u00f3 v\u1eadt t\u01b0\/t\u1ed3n kho.<br \/>\n&#8211; \u0110\u1ec1 xu\u1ea5t g\u00f3i v\u1eadt t\u01b0 + quy c\u00e1ch + khuy\u1ebfn ngh\u1ecb ch\u1ebf t\u1ea1o\/b\u1ea3o tr\u00ec.<\/p>\n<h2 id=\"toc-9-nguon-tham-khao\">Ngu\u1ed3n tham kh\u1ea3o<\/h2>\n<p>&#8211; Nickel Institute \u2013 Flue Gas Desulfurization: Materials of Construction: https:\/\/nickelinstitute.org\/media\/1702\/flue-gas-desulfurization-materials-of-construction.pdf<br \/>\n&#8211; Nickel Institute \u2013 Stainless Steels in Sewage and Wastewater Treatment: https:\/\/nickelinstitute.org\/media\/1631\/stainless-steels-in-sewage-and-wastewater-treatment.pdf<br \/>\n&#8211; IMOA \u2013 Practical Guidelines for the Fabrication of Duplex Stainless Steels: https:\/\/www.imoa.info\/download_files\/stainless-steel\/IMOA_Duplex_Fabrication_Guidelines.pdf<br \/>\n&#8211; Outokumpu \u2013 Corrosion Handbook (tra c\u1ee9u PREN\/kh\u1ea3 n\u0103ng kh\u00e1ng \u0103n m\u00f2n): https:\/\/www.outokumpu.com\/handbook<br \/>\n&#8211; Euro Inox \u2013 Stainless Steel in Water and Wastewater Treatment: https:\/\/www.euro-inox.org<br \/>\n&#8211; QCVN 19:2009\/BTNMT (kh\u00ed th\u1ea3i c\u00f4ng nghi\u1ec7p) v\u00e0 QCVN 40:2011\/BTNMT (n\u01b0\u1edbc th\u1ea3i c\u00f4ng nghi\u1ec7p) \u2013 B\u1ed9 TN&#038;MT.<\/p>\n<h2 id=\"toc-10-ket-luan\">K\u1ebft lu\u1eadn<\/h2>\n<p>&#8211; Ch\u1ecdn inox theo m\u00f4i tr\u01b0\u1eddng l\u00e0 ch\u00eca kh\u00f3a: 316L cho n\u01b0\u1edbc th\u1ea3i th\u00f4ng d\u1ee5ng; 904L\/2205 cho FGD \u01b0\u1edbt, v\u00f9ng ng\u01b0ng t\u1ee5 axit v\u00e0 Cl\u2212 cao; 2507\/254SMO cho n\u01b0\u1edbc bi\u1ec3n\/hypochlorite \u0111\u1eadm \u0111\u1eb7c.<br \/>\n&#8211; Thi\u1ebft k\u1ebf chu\u1ea9n (gi\u1ea3m k\u1ebd, tho\u00e1t n\u01b0\u1edbc), h\u00e0n \u0111\u00fang quy tr\u00ecnh v\u00e0 th\u1ee5 \u0111\u1ed9ng h\u00f3a quy\u1ebft \u0111\u1ecbnh \u0111\u1ed9 b\u1ec1n.<br \/>\n&#8211; So v\u1edbi th\u00e9p carbon l\u00f3t, inox ch\u1ea5t l\u01b0\u1ee3ng (\u0111\u1eb7c bi\u1ec7t duplex) th\u01b0\u1eddng c\u00f3 LCC th\u1ea5p h\u01a1n nh\u1edd tu\u1ed5i th\u1ecd v\u00e0 \u00edt d\u1eebng m\u00e1y.<br \/>\nC\u1ea7n b\u00e1o gi\u00e1 v\u00e0 t\u01b0 v\u1ea5n m\u00e1c ph\u00f9 h\u1ee3p v\u1edbi \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh th\u1ef1c t\u1ebf c\u1ee7a b\u1ea1n? Li\u00ean h\u1ec7 Inox C\u01b0\u1eddng Th\u1ecbnh \u2013 Hotline: 0343.417.281 \u2013 Email: inoxcongnghiep.cuongthinh@gmail.com \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt v\u00e0 gi\u00e1 t\u1ed1t nh\u1ea5t.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>H\u01b0\u1edbng d\u1eabn ch\u1ecdn m\u00e1c inox cho FGD, \u1ed1ng kh\u00f3i, b\u1ec3 n\u01b0\u1edbc th\u1ea3i: 304L, 316L, 904L, duplex 2205\/2507; thi\u1ebft k\u1ebf, h\u00e0n, b\u1ea3o tr\u00ec v\u00e0 LCC \u0111\u1ec3 t\u1ed1i \u01b0u tu\u1ed5i th\u1ecd.<\/p>\n","protected":false},"author":7,"featured_media":1020,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[23],"tags":[],"class_list":["post-1791","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"acf":[],"_links":{"self":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1791","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/comments?post=1791"}],"version-history":[{"count":0,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/posts\/1791\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media\/1020"}],"wp:attachment":[{"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/media?parent=1791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/categories?post=1791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inoxcuongthinh.com\/inct\/wp\/v2\/tags?post=1791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}