{"id":699904,"date":"2024-07-29T09:08:17","date_gmt":"2024-07-29T08:08:17","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=699904"},"modified":"2024-07-29T09:08:17","modified_gmt":"2024-07-29T08:08:17","slug":"chuyen-nhiet-trong-qua-trinh-xu-ly-polymer","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/chuyen-nhiet-trong-qua-trinh-xu-ly-polymer\/","title":{"rendered":"Chuy\u1ec3n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd polymer"},"content":{"rendered":"<p class=\"sidekick\">Chuy\u1ec3n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd polymer: Kh\u00e1m ph\u00e1 c\u00e1ch nhi\u1ec7t lan truy\u1ec1n trong v\u1eadt li\u1ec7u polymer, t\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh v\u00e0 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/chuyen_nhiet_trong_qua_trinh_xu_ly_polymer.png\" alt=\"Chuy\u1ec3n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd polymer\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>Chuy\u1ec3n Nhi\u1ec7t Trong Qu\u00e1 Tr\u00ecnh X\u1eed L\u00fd Polymer<\/h2>\n<p>X\u1eed l\u00fd polymer l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng c\u1ee7a qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t nhi\u1ec1u s\u1ea3n ph\u1ea9m ti\u00eau d\u00f9ng v\u00e0 c\u00f4ng nghi\u1ec7p. M\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng trong qu\u00e1 tr\u00ecnh n\u00e0y l\u00e0 chuy\u1ec3n nhi\u1ec7t, \u1ea3nh h\u01b0\u1edfng l\u1edbn \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 hi\u1ec7u su\u1ea5t c\u1ee7a s\u1ea3n ph\u1ea9m cu\u1ed1i. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u c\u00e1c kh\u00eda c\u1ea1nh c\u01a1 b\u1ea3n c\u1ee7a chuy\u1ec3n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd polymer.<\/p>\n<h2>1. \u0110\u1ecbnh Ngh\u0129a Chuy\u1ec3n Nhi\u1ec7t<\/h2>\n<p>Chuy\u1ec3n nhi\u1ec7t l\u00e0 qu\u00e1 tr\u00ecnh m\u00e0 n\u0103ng l\u01b0\u1ee3ng nhi\u1ec7t \u0111\u01b0\u1ee3c truy\u1ec1n t\u1eeb n\u01a1i c\u00f3 nhi\u1ec7t \u0111\u1ed9 cao \u0111\u1ebfn n\u01a1i c\u00f3 nhi\u1ec7t \u0111\u1ed9 th\u1ea5p. Trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd polymer, nhi\u1ec7t \u0111\u1ed9 c\u1ea7n thi\u1ebft \u0111\u1ec3 l\u00e0m n\u00f3ng ch\u1ea3y v\u00e0 \u0111\u1ecbnh h\u00ecnh polymer r\u1ea5t quan tr\u1ecdng. Qu\u00e1 tr\u00ecnh chuy\u1ec3n nhi\u1ec7t c\u01a1 b\u1ea3n bao g\u1ed3m ba ph\u01b0\u01a1ng th\u1ee9c: d\u1eabn nhi\u1ec7t, \u0111\u1ed1i l\u01b0u v\u00e0 b\u1ee9c x\u1ea1.<\/p>\n<ul>\n<li><u>D\u1eabn nhi\u1ec7t:<\/u> Qu\u00e1 tr\u00ecnh n\u0103ng l\u01b0\u1ee3ng nhi\u1ec7t truy\u1ec1n tr\u1ef1c ti\u1ebfp qua v\u1eadt li\u1ec7u.<\/li>\n<li><u>\u0110\u1ed1i l\u01b0u:<\/u> Qu\u00e1 tr\u00ecnh n\u0103ng l\u01b0\u1ee3ng truy\u1ec1n qua ch\u1ea5t l\u1ecfng ho\u1eb7c kh\u00ed.<\/li>\n<li><u>B\u1ee9c x\u1ea1:<\/u> Qu\u00e1 tr\u00ecnh n\u0103ng l\u01b0\u1ee3ng truy\u1ec1n d\u01b0\u1edbi d\u1ea1ng s\u00f3ng \u0111i\u1ec7n t\u1eeb.<\/li>\n<\/ul>\n<h2>2. Chuy\u1ec3n Nhi\u1ec7t Trong Qu\u00e1 Tr\u00ecnh N\u00f3ng Ch\u1ea3y Polymer<\/h2>\n<p>Trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd polymer, chuy\u1ec3n nhi\u1ec7t x\u1ea3y ra ch\u1ee7 y\u1ebfu khi polymer \u0111\u01b0\u1ee3c l\u00e0m n\u00f3ng ch\u1ea3y. Nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y c\u1ee7a m\u1ed7i lo\u1ea1i polymer kh\u00e1c nhau, v\u00ed d\u1ee5 nh\u01b0 Polyethylene (PE) c\u00f3 nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y kho\u1ea3ng 115-135\u00b0C, trong khi Polypropylene (PP) c\u00f3 nhi\u1ec7t \u0111\u1ed9 n\u00f3ng ch\u1ea3y kho\u1ea3ng 130-171\u00b0C.<\/p>\n<h2>3. C\u00e1c Ph\u01b0\u01a1ng Ph\u00e1p Truy\u1ec1n Nhi\u1ec7t Trong Qu\u00e1 Tr\u00ecnh N\u00f3ng Ch\u1ea3y<\/h2>\n<p>Qu\u00e1 tr\u00ecnh n\u00f3ng ch\u1ea3y polymer th\u01b0\u1eddng s\u1eed d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p truy\u1ec1n nhi\u1ec7t nh\u01b0:<\/p>\n<ol>\n<li><u>S\u1eed d\u1ee5ng c\u00e1c tr\u1ee5c v\u00edt n\u00f3ng:<\/u> \u0110\u01b0a nhi\u1ec7t \u0111\u1ed9 tr\u1ef1c ti\u1ebfp v\u00e0o polymer b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c tr\u1ee5c v\u00edt n\u00f3ng \u0111\u00f4ng c\u01a1.<\/li>\n<li><u>Nung b\u1eb1ng \u0111i\u1ec7n:<\/u> S\u1eed d\u1ee5ng c\u00e1c cu\u1ed9n d\u00e2y \u0111i\u1ec7n \u0111\u1ec3 t\u1ea1o nhi\u1ec7t cho polymer.<\/li>\n<li><u>Nung b\u1eb1ng d\u1ea7u n\u00f3ng:<\/u> S\u1eed d\u1ee5ng d\u1ea7u nhi\u1ec7t \u0111\u1ed9 cao \u0111\u1ec3 truy\u1ec1n nhi\u1ec7t \u0111\u1ed9.<\/li>\n<\/ol>\n<h2>4. C\u00f4ng Th\u1ee9c Chuy\u1ec3n Nhi\u1ec7t C\u01a1 B\u1ea3n<\/h2>\n<p>M\u1ed9t c\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n trong chuy\u1ec3n nhi\u1ec7t qua d\u1eabn nhi\u1ec7t l\u00e0 ph\u01b0\u01a1ng tr\u00ecnh Fourier:<\/p>\n<p style=\"text-align: center;\"><em>q = -k * \\frac{dT}{dx}<\/em><\/p>\n<p>Trong \u0111\u00f3:<\/p>\n<ul>\n<li><em>q<\/em>: L\u01b0u l\u01b0\u1ee3ng nhi\u1ec7t (W\/m\u00b2)<\/li>\n<li><em>k<\/em>: H\u1ec7 s\u1ed1 d\u1eabn nhi\u1ec7t (W\/(m*K))<\/li>\n<li><em>\\(\\frac{dT}{dx}\\):<\/em> \u0110\u1ed9 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 theo kho\u1ea3ng c\u00e1ch<\/li>\n<\/ul>\n<h2>5. \u1ee8ng D\u1ee5ng Trong S\u1ea3n Xu\u1ea5t<\/h2>\n<p>Chuy\u1ec3n nhi\u1ec7t kh\u00f4ng ch\u1ec9 quan tr\u1ecdng trong qu\u00e1 tr\u00ecnh n\u00f3ng ch\u1ea3y m\u00e0 c\u00f2n trong c\u00e1c c\u00f4ng \u0111o\u1ea1n sau:<\/p>\n<ul>\n<li><u>\u0110\u00fac khu\u00f4n:<\/u> Polymer l\u1ecfng \u0111\u01b0\u1ee3c \u0111\u1ed5 v\u00e0o khu\u00f4n v\u00e0 c\u1ea7n duy tr\u00ec nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed3ng nh\u1ea5t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m.<\/li>\n<li><u>L\u00e0m l\u1ea1nh:<\/u> Sau khi \u0111\u00fac khu\u00f4n, s\u1ea3n ph\u1ea9m c\u1ea7n \u0111\u01b0\u1ee3c l\u00e0m l\u1ea1nh nhanh \u0111\u1ec3 \u0111\u1ecbnh h\u00ecnh v\u00e0 gi\u1eef \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc t\u1ed1t.<\/li>\n<\/ul>\n<h2>K\u1ebft Lu\u1eadn<\/h2>\n<p>Hi\u1ec3u bi\u1ebft v\u1ec1 chuy\u1ec3n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd polymer l\u00e0 y\u1ebfu t\u1ed1 then ch\u1ed1t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1ea3n ph\u1ea9m c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t v\u00e0 quy tr\u00ecnh s\u1ea3n xu\u1ea5t hi\u1ec7u qu\u1ea3. Vi\u1ec7c n\u1eafm v\u1eefng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p v\u00e0 nguy\u00ean l\u00fd chuy\u1ec3n nhi\u1ec7t gi\u00fap c\u00e1c k\u1ef9 s\u01b0 v\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh l\u00e0m vi\u1ec7c, gi\u1ea3m thi\u1ec3u l\u1ed7i s\u1ea3n ph\u1ea9m v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Chuy\u1ec3n nhi\u1ec7t trong qu\u00e1 tr\u00ecnh x\u1eed l\u00fd polymer: Kh\u00e1m ph\u00e1 c\u00e1ch nhi\u1ec7t lan truy\u1ec1n trong v\u1eadt li\u1ec7u polymer, t\u1ed1i \u01b0u h\u00f3a quy tr\u00ecnh v\u00e0 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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