{"id":2625,"date":"2026-09-14T15:58:22","date_gmt":"2026-09-14T20:58:22","guid":{"rendered":"https:\/\/www.cestoil.com\/?page_id=2625"},"modified":"2026-09-14T17:12:48","modified_gmt":"2026-09-14T22:12:48","slug":"cc827495-decalcification-sommaire","status":"publish","type":"page","link":"https:\/\/www.cestoil.com\/fr\/case-studies\/cc827495-crude-decalcification\/","title":{"rendered":"Northshore CC827495 : \u00c9limination du calcium brut avec un rapport de dosage inf\u00e9rieur"},"content":{"rendered":"<div class=\"wpb-content-wrapper\" id=\"wpb-content-root\"><div class=\"vc_row wpb_row vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_raw_code wpb_raw_html wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<style>\n.ccr-case{max-width:1120px;margin:36px auto 70px;padding:0 24px;color:#414b53;font:18px\/1.75 Lato,Arial,sans-serif}\n.ccr-case 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span{position:absolute;left:7px;top:7px;white-space:nowrap;font-size:14px;font-weight:700}\n#case-cc827495 .ccr-range-labels{display:flex;justify-content:space-between;font-size:14px;color:#666}#case-cc827495 .ccr-range figcaption{font-size:14px;line-height:1.6;color:#666;margin-top:14px}\n@media(max-width:850px){#case-cc827495 .ccr-hero{grid-template-columns:1fr}#case-cc827495 .ccr-report-preview{margin:0 auto}}\n@media(max-width:600px){#case-cc827495 .ccr-observations{grid-template-columns:1fr;gap:22px}#case-cc827495 .ccr-observations li+li{border-top:1px solid #dedede;padding-top:18px}}\n<\/style><article class=\"ccr-case\" id=\"case-cc827495\" data-publication-version=\"20260914\">\n<nav class=\"ccr-breadcrumb\" aria-label=\"Fil d&#039;Ariane\"><a href=\"\/fr\/etudes-de-cas\/\">\u00c9tudes de cas<\/a> \/ <a href=\"\/fr\/etudes-de-cas\/#refinery-process-solutions\">Solutions pour les proc\u00e9d\u00e9s de raffinage<\/a><\/nav>\n<div class=\"ccr-hero\"><div><p class=\"ccr-label\">Solutions de proc\u00e9d\u00e9s de raffinage \u00b7 \u00c9tude de cas<\/p><h1>Northshore CC827495 : \u00c9limination du calcium brut avec un rapport de dosage inf\u00e9rieur<\/h1><p class=\"ccr-lead\">Une raffinerie a \u00e9valu\u00e9 le produit Northshore CC827495 sur un brut \u00e0 forte teneur en calcium dans son dessaleur \u00e9lectrostatique existant. Sept paires d'\u00e9chantillons ont r\u00e9v\u00e9l\u00e9 un taux d'\u00e9limination du calcium compris entre 70,8 % et 76,3 % (moyenne de 73 % ), avec un rapport d'application inf\u00e9rieur \u00e0 la plage d\u00e9finie dans l'accord technique.<\/p><a class=\"ccr-button\" href=\"https:\/\/www.cestoil.com\/fr\/demander-une-etude-de-cas\/?case=2625\">Demander l'\u00e9tude de cas compl\u00e8te<\/a><\/div><aside class=\"ccr-report-preview\" aria-label=\"Aper\u00e7u du rapport\"><a class=\"ccr-preview-card\" href=\"https:\/\/www.cestoil.com\/fr\/demander-une-etude-de-cas\/?case=2625\" aria-label=\"Demandez l&#039;\u00e9tude de cas compl\u00e8te Northshore CC827495\"><img loading=\"lazy\" src=\"https:\/\/www.cestoil.com\/wp-content\/uploads\/cc827495-case-study-preview-v1.png\" width=\"160\" height=\"207\" alt=\"Aper\u00e7u r\u00e9duit de la premi\u00e8re page du rapport d&#039;\u00e9tude de cas Northshore CC827495\" decoding=\"async\"><\/a><p class=\"ccr-preview-caption\"><strong>PDF illustr\u00e9 de 2 pages<\/strong>Rapport complet disponible sur approbation.<\/p><\/aside><\/div>\n<aside class=\"ccr-highlight\" aria-label=\"Observations signal\u00e9es\"><p class=\"ccr-label\">Observations signal\u00e9es<\/p><ul class=\"ccr-observations\"><li><strong>73%<\/strong>\u00c9limination moyenne du calcium pour sept \u00e9chantillons appari\u00e9s.<\/li><li><strong>2,5\u00d7<\/strong>Dose appliqu\u00e9e par rapport \u00e0 la teneur moyenne en calcium de l'aliment, inf\u00e9rieure \u00e0 la fourchette de 3,5 \u00e0 5 fois pr\u00e9vue par l'accord.<\/li><li><strong>1,82 mg\/L<\/strong>Teneur moyenne en sel du brut dessal\u00e9 alors que le d\u00e9bit de brut d\u00e9passait d'environ 21 % la base contractuelle.<\/li><\/ul><\/aside>\n<nav class=\"ccr-jump\" aria-label=\"Sur cette page\"><a href=\"#operating-context\">Contexte op\u00e9rationnel<\/a><a href=\"#monitored-application\">Candidature<\/a><a href=\"#reported-results\">R\u00e9sultats communiqu\u00e9s<\/a><a href=\"#case-report\">\u00c9tude de cas compl\u00e8te<\/a><\/nav>\n<section class=\"ccr-section\" id=\"operating-context\"><h2>Contexte op\u00e9rationnel et objectif<\/h2><div><p>Une raffinerie a introduit un p\u00e9trole brut contenant <strong>11,5\u201312,8 mg\/kg de calcium<\/strong> vers une unit\u00e9 de distillation atmosph\u00e9rique et sous vide. L'usine souhaitait \u00e9liminer le calcium dans son dessaleur \u00e9lectrostatique existant, sans ajouter d'\u00e9quipement ni modifier les conditions de dessalage. L'accord technique relatif au programme de d\u00e9calcification pr\u00e9voyait un dosage de produits chimiques de <strong>3,5 \u00e0 5 fois<\/strong> la teneur en calcium du brut.<\/p><p>Le calcium li\u00e9 organiquement ne passe pas dans l'eau de lavage par simple partage. Un agent d\u00e9calcifiant le transforme en un sel hydrosoluble durant le temps de s\u00e9jour dans le dessaleur, permettant ainsi au calcium d'\u00eatre \u00e9vacu\u00e9 avec la saumure plut\u00f4t que de poursuivre son chemin vers la cha\u00eene de pr\u00e9chauffage, le four et l'unit\u00e9 de craquage catalytique (FCC).<\/p><\/div><\/section>\n<section class=\"ccr-section\" id=\"monitored-application\"><h2>Produit et application surveill\u00e9e<\/h2><div><p>Le Northshore CC827495 a \u00e9t\u00e9 inject\u00e9, via l'installation existante d'injection pour l'\u00e9limination des m\u00e9taux, dans la conduite d'eau de lavage en amont du dessaleur de deuxi\u00e8me \u00e9tage. Le traitement a d\u00e9but\u00e9 le <strong>21 mai 2020 \u00e0 30 ppm sur brut<\/strong>, \u00e0 propos de <strong>2,5 fois<\/strong> la teneur moyenne en calcium de l'aliment, bas\u00e9e sur sept \u00e9chantillons.<\/p><p>Les conditions de fonctionnement ont \u00e9t\u00e9 maintenues telles quelles : temp\u00e9rature du dessaleur. <strong>125\u2013135 \u00b0C<\/strong>, interface <strong>30 \u00e0 50 %<\/strong>, eau de lavage \u00e0 <strong>pH 9<\/strong> avec recirculation \u00e9tag\u00e9e de la saumure et une perte de charge de la vanne de m\u00e9lange de <strong>35\u201360 kPa<\/strong>Du 9 au 30 juin, le laboratoire de l'usine a pr\u00e9lev\u00e9 sept paires d'\u00e9chantillons de brut \u00e0 l'entr\u00e9e et \u00e0 la sortie, et a analys\u00e9 la teneur en calcium de chacun d'eux.<\/p><\/div><\/section>\n<section class=\"ccr-section ccr-result\" id=\"reported-results\"><h2>R\u00e9sultats communiqu\u00e9s<\/h2><div><p><strong>L'\u00e9limination du calcium a \u00e9t\u00e9 constante pour les sept paires d'\u00e9chantillons.<\/strong> L'enl\u00e8vement allait de <strong>70,8 % \u00e0 76,3 %<\/strong> et a atteint une moyenne de <strong>73%<\/strong>. La teneur en calcium de l'aliment, comprise entre 11,5 et 12,8 mg\/kg, a \u00e9t\u00e9 r\u00e9duite \u00e0 <strong>2,8\u20133,7 mg\/kg<\/strong>; aucun \u00e9chantillon n'est descendu en dessous de 70 % d'\u00e9limination.<\/p>\n<figure class=\"ccr-range\"><h3>\u00c9limination du calcium sur sept \u00e9chantillons appari\u00e9s<\/h3><div class=\"ccr-range-track\" aria-label=\"Le taux d&#039;\u00e9limination rapport\u00e9 varie de 70,8 \u00e0 76,3 %, avec une moyenne de 73 %.\"><span class=\"ccr-range-fill\"><\/span><span class=\"ccr-range-average\"><span>Moyenne de 73 %<\/span><\/span><\/div><div class=\"ccr-range-labels\"><span>0%<\/span><span>Plage rapport\u00e9e de 70,8 \u00e0 76,3 %<\/span><span>100%<\/span><\/div><figcaption>Figure 1. Plage compl\u00e8te des valeurs relev\u00e9es sur trois semaines \u00e0 une dose constante de 30 ppm. Donn\u00e9es du laboratoire de l'usine, juin 2020.<\/figcaption><\/figure>\n<p><strong>Le r\u00e9sultat a \u00e9t\u00e9 obtenu en de\u00e7\u00e0 de la plage de rapport de doses pr\u00e9vue par l'accord.<\/strong> La section du rapport consacr\u00e9e aux donn\u00e9es indique un rapport de 2\u00d7, tandis que sa conclusion fait \u00e9tat d'un rapport de 2,5\u00d7. En utilisant la valeur de 30 ppm et la teneur moyenne en calcium de l'aliment (\u00e9tablie \u00e0 12,1 mg\/kg \u00e0 partir de sept \u00e9chantillons), on obtient environ <strong>2,5\u00d7<\/strong>; la page web et le PDF r\u00e9capitulatif utilisent ce ratio calcul\u00e9 et conservent l'\u00e9cart dans le relev\u00e9 d\u00e9taill\u00e9.<\/p>\n<div class=\"ccr-table-wrap\"><table><caption>Conditions et r\u00e9sultats de l'essai rapport\u00e9s<\/caption><thead><tr><th scope=\"col\">Mesure<\/th><th scope=\"col\">Valeur d\u00e9clar\u00e9e<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">Taux brut<\/th><td>370\u2013380 t\/h, soit environ 21 % au-dessus de la base de 310 t\/h pr\u00e9vue par l'accord<\/td><\/tr><tr><th scope=\"row\">Eau de lavage<\/th><td>11 \u00e0 13 t\/h par \u00e9tage, en de\u00e7\u00e0 des 14 \u00e0 16 t\/h pr\u00e9vues au contrat<\/td><\/tr><tr><th scope=\"row\">Sel issu du dessalage du p\u00e9trole brut<\/th><td>1,1\u20132,6 mg\/L, avec une moyenne de 1,82 mg\/L<\/td><\/tr><tr><th scope=\"row\">Effets ind\u00e9sirables signal\u00e9s<\/th><td>Aucun impact sur le fonctionnement de l'unit\u00e9, la ma\u00eetrise de la corrosion, les propri\u00e9t\u00e9s du produit ou les unit\u00e9s en aval.<\/td><\/tr><\/tbody><\/table><\/div>\n<p>Le client a constat\u00e9 un dessalement constant au cours de l'essai. Le rapport ne fournissant pas de valeur de r\u00e9f\u00e9rence initiale pour la teneur en sel, les r\u00e9sultats obtenus refl\u00e8tent les conditions durant le traitement plut\u00f4t qu'une am\u00e9lioration mesur\u00e9e par comparaison avant et apr\u00e8s l'op\u00e9ration.<\/p><\/div><\/section>\n<section class=\"ccr-section\" id=\"operational-value\"><h2>Valeur op\u00e9rationnelle<\/h2><div><p>Le rapport source pr\u00e9sente le r\u00e9sultat en termes de proc\u00e9d\u00e9 et ne fournit aucun chiffre mon\u00e9taire. Dans les conditions indiqu\u00e9es, le programme a r\u00e9duit la teneur moyenne en calcium \u00e0 la sortie du dessaleur \u00e0 <strong>3,3 mg\/kg<\/strong>, contre une moyenne de 12,1 mg\/kg dans la charge, tout en utilisant le point d'injection existant et en op\u00e9rant \u00e0 un d\u00e9bit de brut \u00e9lev\u00e9.<\/p><p>Pour une autre raffinerie, une analyse \u00e9conomique permettrait de relier l'\u00e9limination du calcium \u00e0 la stabilit\u00e9 du dessaleur, \u00e0 l'encrassement des fours et des \u00e9changeurs de chaleur, ainsi qu'\u00e0 l'\u00e9tat du catalyseur FCC. Il s'agit l\u00e0 d'\u00e9l\u00e9ments d'\u00e9valuation ; le pr\u00e9sent rapport d'essai ne quantifie pas les \u00e9conomies r\u00e9alis\u00e9es dans ces domaines.<\/p><\/div><\/section>\n<section class=\"ccr-section\" id=\"applying-findings\"><h2>Application des r\u00e9sultats<\/h2><div><p>Utilisez des \u00e9chantillons appari\u00e9s d'entr\u00e9e et de sortie pour \u00e9valuer l'\u00e9limination du calcium, et consignez, pour chaque \u00e9chantillon, la teneur en calcium du brut, le dosage du produit chimique, le d\u00e9bit d'eau de lavage, la position de l'interface, la temp\u00e9rature ainsi que la perte de charge \u00e0 la vanne de m\u00e9lange. Exprimez le dosage du produit chimique \u00e0 la fois en ppm par rapport au brut et sous forme de rapport par rapport \u00e0 la teneur en calcium mesur\u00e9e \u00e0 l'alimentation, afin de permettre la comparaison du traitement entre diff\u00e9rents types de bruts.<\/p><p>\u00c9tablissez une valeur de r\u00e9f\u00e9rence initiale de la teneur en sel lorsque la performance de dessalage fait partie de l'\u00e9valuation. Ce cas confirme le niveau de sel observ\u00e9 durant le traitement, mais l'absence de valeur de r\u00e9f\u00e9rence emp\u00eache d'affirmer directement qu'il y a eu am\u00e9lioration.<\/p><\/div><\/section>\n<section class=\"ccr-request\" id=\"case-report\"><h2>Discuter d'une application similaire<\/h2><p>Demandez l'\u00e9tude de cas compl\u00e8te et illustr\u00e9e, et communiquez-nous la plage de teneur en calcium de votre brut, la configuration de votre dessaleur ainsi que votre taux de traitement actuel. Cestoil pourra alors examiner l'application et proposer un plan d'\u00e9chantillonnage appari\u00e9 pour votre brut.<\/p><a class=\"ccr-button\" href=\"https:\/\/www.cestoil.com\/fr\/demander-une-etude-de-cas\/?case=2625\">Demander l'\u00e9tude de cas compl\u00e8te<\/a><p class=\"ccr-small\" style=\"margin-top:16px\">Les informations sur l'entreprise et l'usage pr\u00e9vu sont examin\u00e9s avant la communication du PDF d\u00e9taill\u00e9. Pour une assistance li\u00e9e \u00e0 la demande, <a href=\"\/fr\/contact\/\">Contactez notre \u00e9quipe technique<\/a>.<\/p><\/section>\n<p class=\"ccr-small\">Source : rapport d'essai client de la raffinerie participante (mai-juin 2020), tel que r\u00e9sum\u00e9 dans l'\u00e9tude de cas Cestoil CS-CDU-CC827495-2026A, v1.0. Toutes les donn\u00e9es op\u00e9rationnelles sont communiqu\u00e9es par le client. Les performances refl\u00e8tent les conditions sp\u00e9cifiques de l'essai et sont susceptibles de varier en fonction de la qualit\u00e9 de la charge et des conditions d'exploitation.<\/p>\n<nav class=\"ccr-links\" aria-label=\"Pages connexes\"><a href=\"\/fr\/applications-des-produits\/solutions-de-procedes-de-raffinage\/anticalcaire-et-antirouille\/\">Pr\u00e9traitement du p\u00e9trole brut \u2014 \u00c9limination des m\u00e9taux<\/a><a href=\"\/fr\/etudes-de-cas\/cc827494-decalcification-sommaire\/\">Affaire connexe : Northshore CC827494<\/a><a href=\"\/fr\/etudes-de-cas\/\">Toutes les \u00e9tudes de cas<\/a><\/nav>\n<\/article>\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Northshore CC827495 a permis d'\u00e9liminer en moyenne 73 % du calcium pr\u00e9sent dans le p\u00e9trole brut sur sept paires d'\u00e9chantillons, avec un rapport de dosage de 2,5 fois, dans un dessaleur de raffinerie existant.<\/p>","protected":false},"author":2,"featured_media":0,"parent":669,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"class_list":["post-2625","page","type-page","status-publish","hentry","description-off"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"Northshore CC827495 averaged 73% crude-calcium removal across seven paired samples at a 2.5\u00d7 dose ratio in an existing refinery desalter.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.cestoil.com\/fr\/case-studies\/cc827495-crude-decalcification\/\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO Pro (AIOSEO) 5.0.4\" \/>\n\t\t<meta property=\"og:locale\" content=\"fr_CA\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Cestoil Chemical Inc.\" \/>\n\t\t<meta 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