{"id":6739,"date":"2024-03-20T03:07:04","date_gmt":"2024-03-20T03:07:04","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=6739"},"modified":"2026-04-28T10:42:26","modified_gmt":"2026-04-28T10:42:26","slug":"super-detailed-chemical-plant-flow-chart","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/fr\/super-detailed-chemical-plant-flow-chart\/","title":{"rendered":"Organigramme tr\u00e8s d\u00e9taill\u00e9 d'une usine chimique !"},"content":{"rendered":"<h1><strong>Organigramme tr\u00e8s d\u00e9taill\u00e9 d'une usine chimique !<\/strong><\/h1>\n<p><!-- lc-qa-start --><\/p>\n<p><strong>Quick answer:<\/strong> For paint and coating topics, formulators usually compare flow, substrate fit, surface quality, and durability together because the same adjustment can improve one property while weakening another.<\/p>\n<p><!-- lc-qa-end --><\/p>\n<h2>Organigramme du dispositif d'isom\u00e9risation<\/h2>\n<p><img decoding=\"async\" class=\"alignnone size-full wp-image-6740\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/1.png\" alt=\"\" width=\"640\" height=\"358\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/1.png 640w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/1-600x336.png 600w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p>Une unit\u00e9 d'isom\u00e9risation est similaire \u00e0 une unit\u00e9 d'hydrofinissage ordinaire.<\/p>\n<p>Prenons l'isom\u00e9risation du butane comme exemple (voir figure), l'alimentation en butane est s\u00e9par\u00e9e de l'isobutane par la tour de d\u00e9-isobutane, et le n-butane est principalement au bas de la tour, qui est m\u00e9lang\u00e9 avec de l'hydrog\u00e8ne et chauff\u00e9 dans le r\u00e9acteur. La pression de r\u00e9action est d'environ 2,1~2,8MPa, la temp\u00e9rature de 145~205\u2103, le rapport molaire de l'hydrog\u00e8ne et des hydrocarbures est de 0,1~0,5, et la vitesse de l'air est de 3~5h-1.<\/p>\n<p>&nbsp;<\/p>\n<p class=\"p\" align=\"justify\"><b><span style=\"font-family: Microsoft YaHei UI;\">Organigramme de l'unit\u00e9 d'extraction du benz\u00e8ne<\/span><\/b><b><\/b><\/p>\n<p class=\"p\" align=\"justify\"><img decoding=\"async\" class=\"alignnone size-full wp-image-6741\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/2.png\" alt=\"\" width=\"640\" height=\"397\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/2.png 640w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/2-600x372.png 600w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p class=\"p\" align=\"justify\">\n<p class=\"p\" align=\"justify\"><span style=\"font-family: Microsoft YaHei UI;\">L'unit\u00e9 d'extraction du benz\u00e8ne, en tant qu'unit\u00e9 d'extraction du benz\u00e8ne contenu dans l'essence reform\u00e9e, comprend principalement les parties suivantes : pr\u00e9-fractionnement, distillation extractive, r\u00e9cup\u00e9ration et r\u00e9g\u00e9n\u00e9ration du solvant, raffinage du benz\u00e8ne et r\u00e9action d'hydrotraitement non aromatique en C6, et fractionnement.<\/span><\/p>\n<p class=\"p\" align=\"justify\">\n<p class=\"p\" align=\"justify\"><b><span style=\"font-family: Microsoft YaHei UI;\">Organigramme de la r\u00e9action d'hydrog\u00e9nation du diesel<\/span><\/b><\/p>\n<p align=\"justify\"><img decoding=\"async\" class=\"alignnone size-full wp-image-6742\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/3.png\" alt=\"\" width=\"640\" height=\"405\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/3.png 640w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/3-600x380.png 600w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p class=\"p\" align=\"justify\"><b><span style=\"font-family: Microsoft YaHei UI;\">\u00c9tude du type polycristallin dans le d\u00e9veloppement du processus de cristallisation des m\u00e9dicaments<\/span><\/b><b><\/b><\/p>\n<p class=\"p\" align=\"justify\">\n<p class=\"p\" align=\"justify\"><span style=\"font-family: Microsoft YaHei UI;\">L'huile d'alimentation provenant de la zone du r\u00e9servoir p\u00e9n\u00e8tre dans le r\u00e9servoir tampon d'huile d'alimentation, qui est scell\u00e9 avec du gaz combustible, apr\u00e8s avoir \u00e9limin\u00e9 les particules de plus de 25 microm\u00e8tres dans l'huile d'alimentation \u00e0 travers le filtre d'huile d'alimentation sous le contr\u00f4le du niveau de liquide et du d\u00e9bit du r\u00e9servoir tampon d'huile d'alimentation.<\/span><\/p>\n<p class=\"p\" align=\"justify\">\n<p class=\"p\" align=\"justify\"><span style=\"font-family: Microsoft YaHei UI;\">L'huile d'alimentation provenant du r\u00e9servoir tampon d'huile d'alimentation est pressuris\u00e9e par la pompe d'alimentation hydraulique, puis, sous contr\u00f4le du d\u00e9bit, apr\u00e8s \u00e9change de chaleur \u00e0 travers l'\u00e9changeur de chaleur effluent r\u00e9actionnel\/huile d'alimentation, elle est m\u00e9lang\u00e9e \u00e0 de l'hydrog\u00e8ne mixte dans l'\u00e9changeur de chaleur effluent r\u00e9actionnel\/alimentation r\u00e9actionnelle, puis chauff\u00e9e \u00e0 la temp\u00e9rature de r\u00e9action requise par le r\u00e9chauffeur d'alimentation r\u00e9actionnelle, avant d'entrer dans le r\u00e9acteur d'hydrofinissage. Le r\u00e9acteur est \u00e9quip\u00e9 de deux lits catalytiques et d'une installation d'injection d'hydrog\u00e8ne d'urgence entre les lits.<\/span><\/p>\n<p class=\"p\" align=\"justify\">\n<p class=\"p\" align=\"justify\"><span style=\"font-family: Microsoft YaHei UI;\">L'effluent r\u00e9actionnel du r\u00e9acteur d'hydrofinissage est \u00e9chang\u00e9 avec l'alimentation r\u00e9actionnelle, l'huile basse minute et l'huile de mati\u00e8re premi\u00e8re \u00e0 travers l'\u00e9changeur de chaleur effluent r\u00e9actionnel\/alimentation r\u00e9actionnelle, l'\u00e9changeur de chaleur effluent r\u00e9actionnel\/huile basse minute et l'\u00e9changeur de chaleur effluent r\u00e9actionnel\/huile de mati\u00e8re premi\u00e8re, puis il est refroidi \u00e0 45\u2103 \u00e0 travers le refroidisseur d'air de l'effluent r\u00e9actionnel et le refroidisseur d'eau, avant d'entrer dans le s\u00e9parateur \u00e0 haute pression. Afin d'emp\u00eacher la pr\u00e9cipitation du sel d'ammonium dans l'effluent de r\u00e9action \u00e0 basse temp\u00e9rature, de l'eau d\u00e9soxyg\u00e9n\u00e9e est inject\u00e9e dans le pipeline en amont du refroidisseur d'air de l'effluent de r\u00e9action au moyen d'une pompe d'injection d'eau.<\/span><\/p>\n<p class=\"p\" align=\"justify\">\n<p class=\"p\" align=\"justify\"><span style=\"font-family: Microsoft YaHei UI;\">L'effluent de r\u00e9action refroidi est s\u00e9par\u00e9 en huile, gaz et eau dans le s\u00e9parateur \u00e0 haute pression. Le gaz \u00e0 haute fraction (hydrog\u00e8ne circulant) est s\u00e9par\u00e9 par le r\u00e9servoir s\u00e9parateur d'entr\u00e9e du compresseur d'hydrog\u00e8ne circulant, puis entre dans le compresseur d'hydrog\u00e8ne circulant pour augmenter la pression, avant d'\u00eatre divis\u00e9 en deux voies : l'une est utilis\u00e9e comme hydrog\u00e8ne fortement refroidi dans le r\u00e9acteur ; l'autre est m\u00e9lang\u00e9e avec le nouvel hydrog\u00e8ne provenant du nouveau compresseur d'hydrog\u00e8ne, et l'hydrog\u00e8ne m\u00e9lang\u00e9 est m\u00e9lang\u00e9 avec l'huile de la mati\u00e8re premi\u00e8re comme alimentation de la r\u00e9action. Les eaux us\u00e9es contenant du soufre et de l'ammoniac sont \u00e9vacu\u00e9es par le bas du s\u00e9parateur haute pression vers l'unit\u00e9 d'extraction des vapeurs d'eau acide pour \u00eatre trait\u00e9es. La phase huileuse haute p\u00e9n\u00e8tre dans le s\u00e9parateur basse pression par une vanne r\u00e9gulatrice de r\u00e9duction de pression sous contr\u00f4le du niveau de liquide, et son gaz de d\u00e9tente est d\u00e9charg\u00e9 dans le r\u00e9seau de gaz combustible de l'usine.<\/span><\/p>\n<p class=\"p\" align=\"justify\">\n<p class=\"p\" align=\"justify\"><span style=\"font-family: Microsoft YaHei UI;\">L'huile \u00e0 faible teneur entre dans la tour de stripage des vapeurs de diesel par l'\u00e9changeur de chaleur diesel raffin\u00e9\/huile \u00e0 faible teneur et l'\u00e9changeur de chaleur effluent de r\u00e9action\/huile \u00e0 faible teneur apr\u00e8s avoir \u00e9chang\u00e9 de la chaleur avec le diesel raffin\u00e9 et l'effluent de r\u00e9action, respectivement. La temp\u00e9rature d'entr\u00e9e est contr\u00f4l\u00e9e par la r\u00e9gulation de d\u00e9rivation de l'\u00e9changeur de chaleur effluent de r\u00e9action\/huile \u00e0 faible teneur. L'hydrog\u00e8ne frais entre dans le nouveau compresseur d'hydrog\u00e8ne par le r\u00e9servoir s\u00e9parateur d'entr\u00e9e du nouveau compresseur d'hydrog\u00e8ne apr\u00e8s s\u00e9paration du liquide et m\u00e9lange avec l'hydrog\u00e8ne en circulation apr\u00e8s une pressurisation en deux \u00e9tapes.<\/span><\/p>\n<p class=\"p\" align=\"justify\"><b><span style=\"font-family: Microsoft YaHei UI;\">Organigramme partiel de l'hydrofractionnement du diesel<\/span><\/b><\/p>\n<p align=\"justify\"><img decoding=\"async\" class=\"alignnone size-full wp-image-6743\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/4.png\" alt=\"\" width=\"640\" height=\"357\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/4.png 640w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/4-600x335.png 600w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p class=\"p\" align=\"justify\"><span style=\"font-family: Microsoft YaHei UI;\">L'huile \u00e0 faible teneur provenant de la section de r\u00e9action entre dans la tour de stripage du carburant diesel par l'interm\u00e9diaire de l'\u00e9changeur de chaleur carburant diesel raffin\u00e9\/huile \u00e0 faible teneur et de l'\u00e9changeur de chaleur effluent de r\u00e9action\/huile \u00e0 faible teneur jusqu'\u00e0 environ 275\u00b0C. L'huile et le gaz au bas de la tour sont stripp\u00e9s avec de la vapeur surchauff\u00e9e de 1,0 MPa.<\/span><\/p>\n<p class=\"p\" align=\"justify\">\n<p class=\"p\" align=\"justify\"><span style=\"font-family: Microsoft YaHei UI;\">Le bas de la tour avec 1,0MPa vapeur surchauff\u00e9e vaporisation, le haut de la tour huile et gaz par le haut de la tour de vaporisation refroidisseur d'air et le haut de la tour de vaporisation apr\u00e8s le refroidisseur condensation et refroidissement \u00e0 40 \u2103, dans le haut de la tour de vaporisation r\u00e9servoir de reflux pour la s\u00e9paration triphasique de gaz, huile, l'eau. Le gaz flash\u00e9 est d\u00e9charg\u00e9 dans le dispositif catalytique. La phase huileuse est pressuris\u00e9e par la pompe \u00e0 reflux au sommet de la tour de stripage, puis une partie est utilis\u00e9e comme reflux au sommet de la tour, et une autre partie est utilis\u00e9e comme essence brute pour aller vers le dispositif catalytique. Les eaux us\u00e9es contenant du soufre et de l'ammoniac sont envoy\u00e9es hors de l'usine avec les eaux us\u00e9es hautement fractionn\u00e9es.<\/span><\/p>\n<p class=\"p\" align=\"justify\">\n<p class=\"p\" align=\"justify\"><b><span style=\"font-family: Microsoft YaHei UI;\">Exp\u00e9rience post-traitement dans le processus de synth\u00e8se<\/span><\/b><b><\/b><\/p>\n<p class=\"p\" align=\"justify\">\n<p class=\"p\" align=\"justify\"><span style=\"font-family: Microsoft YaHei UI;\">Afin d'inhiber la corrosion du sulfure d'hydrog\u00e8ne sur la canalisation sup\u00e9rieure de la tour et l'\u00e9quipement d'\u00e9change de froid, la mesure d'injection d'inhibiteur de corrosion est adopt\u00e9e dans la canalisation sup\u00e9rieure de la tour. L'inhibiteur de corrosion est inject\u00e9 dans la canalisation sup\u00e9rieure de la tour \u00e0 partir du r\u00e9servoir d'inhibiteurs de corrosion, par l'interm\u00e9diaire de la pompe \u00e0 inhibiteurs de corrosion.<\/span><\/p>\n<p class=\"p\" align=\"justify\">\n<p class=\"p\" align=\"justify\"><span style=\"font-family: Microsoft YaHei UI;\">Le bas de la tour raffine le carburant diesel par la pressurisation de la pompe diesel et l'\u00e9change de chaleur de l'huile basse \u00e0 environ 80 \u2103, puis dans le refroidisseur d'air du carburant diesel refroidi \u00e0 50 \u2103 hors de l'appareil.<\/span><\/p>\n<p class=\"p\" align=\"justify\"><b><span style=\"font-family: \u5b8b\u4f53;\">Organigramme partiel de la r\u00e9action d'hydrotraitement du charbon aviation<\/span><\/b><\/p>\n<p align=\"justify\"><img decoding=\"async\" class=\"alignnone size-full wp-image-6744\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/5.png\" alt=\"\" width=\"640\" height=\"475\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/5.png 640w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/5-600x445.png 600w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p align=\"justify\"><b><span style=\"font-family: \u5b8b\u4f53;\">Hydrofractionnement du charbon d'avion - partie de l'organigramme<\/span><\/b><\/p>\n<p align=\"justify\"><img decoding=\"async\" class=\"alignnone size-full wp-image-6745\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/6.png\" alt=\"\" width=\"640\" height=\"379\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/6.png 640w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/6-600x355.png 600w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p align=\"justify\"><b><span style=\"font-family: \u5b8b\u4f53;\">Organigramme de l'usine de production d'hydrog\u00e8ne<\/span><\/b><\/p>\n<p align=\"justify\"><img decoding=\"async\" class=\"alignnone size-full wp-image-6746\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/7.png\" alt=\"\" width=\"640\" height=\"390\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/7.png 640w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/7-600x366.png 600w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p align=\"justify\"><strong>Production d'hydrog\u00e8ne et de vapeur - partie du diagramme de flux<\/strong><\/p>\n<p align=\"justify\"><img decoding=\"async\" class=\"alignnone size-full wp-image-6747\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/8.png\" alt=\"\" width=\"640\" height=\"408\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/8.png 640w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/8-600x383.png 600w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p class=\"p\" align=\"justify\"><b><span style=\"font-family: Microsoft YaHei UI;\">Crystallization Dry 6 || D\u00e9couvrez la cristallisation \u00e0 l'\u00e9tat fondu !<\/span><\/b><b><\/b><\/p>\n<p class=\"p\" align=\"justify\"><b><span style=\"font-family: Microsoft YaHei UI;\">R\u00e9cup\u00e9ration de soufre pour la production de soufre Organigramme partiel<\/span><\/b><\/p>\n<p align=\"justify\"><img decoding=\"async\" class=\"alignnone size-full wp-image-6748\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/9.png\" alt=\"\" width=\"640\" height=\"413\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/9.png 640w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/9-600x387.png 600w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p align=\"justify\"><b><span style=\"font-family: \u5b8b\u4f53;\">Organigramme de la section des gaz de queue pour la r\u00e9cup\u00e9ration du soufre<\/span><\/b><\/p>\n<p align=\"justify\"><img decoding=\"async\" class=\"alignnone size-full wp-image-6749\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/11.png\" alt=\"\" width=\"640\" height=\"352\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/11.png 640w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/11-600x330.png 600w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p align=\"justify\"><b><span style=\"font-family: \u5b8b\u4f53;\">Organigramme de l'unit\u00e9 de r\u00e9g\u00e9n\u00e9ration des solvants<\/span><\/b><\/p>\n<p align=\"justify\"><img decoding=\"async\" class=\"alignnone size-full wp-image-6750\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/12.png\" alt=\"\" width=\"640\" height=\"419\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/12.png 640w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/12-600x393.png 600w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p align=\"justify\"><b><span style=\"font-family: \u5b8b\u4f53;\">Proc\u00e9d\u00e9 d'\u00e9puration des vapeurs d'eau acide<\/span><\/b><\/p>\n<p align=\"justify\"><img decoding=\"async\" class=\"alignnone size-full wp-image-6751\" src=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/13.png\" alt=\"\" width=\"640\" height=\"402\" srcset=\"https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/13.png 640w, https:\/\/longchangchemical.com\/wp-content\/uploads\/2024\/03\/13-600x377.png 600w\" sizes=\"(max-width: 640px) 100vw, 640px\" \/><\/p>\n<p><!-- lc-commercial-start --><\/p>\n<h2>A practical checklist for coating formulation decisions<\/h2>\n<p>In conventional coating work, technical buyers usually move fastest when they define the film-performance target first and then review rheology, substrate compatibility, additives, and long-term durability as one system instead of isolated tweaks.<\/p>\n<ul>\n<li><strong>Start from the application scenario:<\/strong> furniture, powder coating, industrial paint, and waterborne systems often reward different formulation priorities.<\/li>\n<li><strong>Check surface quality and process stability together:<\/strong> leveling, wetting, foam control, and drying often interact strongly.<\/li>\n<li><strong>Review the film after full cure or drying:<\/strong> adhesion, hardness, weatherability, and color stability usually decide the commercial result.<\/li>\n<li><strong>Use targeted additive screening:<\/strong> wetting, leveling, defoaming, and wear-resistance additives work best when the defect is clearly defined.<\/li>\n<\/ul>\n<h3>Recommended product references<\/h3>\n<ul>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiaf-094\/\">CHLUMIAF 094<\/a>:<\/strong> A balanced defoamer reference for waterborne coatings and many general foam-control screens.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiaf-3062\/\">CHLUMIAF 3062<\/a>:<\/strong> Useful when printing-ink and UV-ink compatibility matter in the defoaming screen.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiaf-3037\/\">CHLUMIAF 3037<\/a>:<\/strong> A stronger process-defoaming option when persistent foam survives harsher conditions.<\/li>\n<li><strong><a href=\"https:\/\/longchangchemical.com\/fr\/product\/chlumiwe-3280\/\">CHLUMIWE 3280<\/a>:<\/strong> A strong wetting-agent reference for inks, coatings, and difficult substrate wetting.<\/li>\n<\/ul>\n<h3>FAQ for buyers and formulators<\/h3>\n<p><strong>Why can a coating with good initial appearance still fail later?<\/strong><br \/>Because many failures show up only after full cure, storage, or service exposure, when adhesion, flexibility, or weatherability becomes the limiting factor.<\/p>\n<p><strong>Should coating additives be chosen one by one outside the full formula?<\/strong><br \/>It is usually safer to screen them inside the real formula because resin choice, pigments, and the rest of the additive package can change the result.<\/p>\n<p><!-- lc-commercial-end --><\/p>","protected":false},"excerpt":{"rendered":"<p>Flow chart of isomerization device An isomerization unit is similar to an ordinary hydrofinishing unit. Take butane isomerization as an example (see figure), butane feed is separated from isobutane by<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[106],"tags":[],"class_list":["post-6739","post","type-post","status-publish","format-standard","hentry","category-laboratory-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.3.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Super detailed chemical plant flow chart! - Longchang Chemical<\/title>\n<meta name=\"description\" content=\"Flow chart of isomerization device An isomerization unit is similar to an ordinary hydrofinishing unit. 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