{"id":9828,"date":"2021-12-07T13:40:31","date_gmt":"2021-12-07T05:40:31","guid":{"rendered":"https:\/\/www.zonelenviro.com\/en-quoi-consiste-le-pre-revetement-anti-poussiere-pour-les-caissons-de-filtres-a-manches-comment-proceder-au-pre-revetement-anti-poussiere\/"},"modified":"2026-04-15T16:56:47","modified_gmt":"2026-04-15T08:56:47","slug":"en-quoi-consiste-le-pre-revetement-anti-poussiere-pour-les-caissons-de-filtres-a-manches-comment-proceder-au-pre-revetement-anti-poussiere","status":"publish","type":"post","link":"https:\/\/www.zonelenviro.com\/fr\/en-quoi-consiste-le-pre-revetement-anti-poussiere-pour-les-caissons-de-filtres-a-manches\/","title":{"rendered":"En quoi consiste le pr\u00e9-rev\u00eatement anti-poussi\u00e8re pour les caissons de filtres \u00e0 manches ? Comment proc\u00e9der au pr\u00e9-rev\u00eatement anti-poussi\u00e8re ?"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">En quoi consiste le pr\u00e9-rev\u00eatement anti-poussi\u00e8re pour le bo\u00eetier d&#8217;un filtre \u00e0 sac\u00a0? Comment effectuer ce pr\u00e9-rev\u00eatement\u00a0?<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Le pr\u00e9-enrobage ou l&#8217;ensemencement des sacs filtrants \u00e0 poussi\u00e8re consiste \u00e0 pr\u00e9-enduire la surface des sacs filtrants de poussi\u00e8re avec la poussi\u00e8re d&#8217;aide \u00e0 la filtration avant que les syst\u00e8mes ne fonctionnent normalement lors de l&#8217;installation des nouveaux sacs filtrants.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Les avantages sont les suivants\u00a0:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">1. Lors du d\u00e9marrage du d\u00e9poussi\u00e9reur, et plus particuli\u00e8rement au d\u00e9but, l&#8217;air ambiant peut contenir une forte humidit\u00e9, ainsi que des r\u00e9sidus de combustion incompl\u00e8te, du coke collant et des hydrocarbures. Si les sacs filtrants sont pr\u00e9-enduits, ces mati\u00e8res humides ou collantes n&#8217;entreront pas en contact direct avec eux, ce qui r\u00e9duit les risques de colmatage ou de corrosion et prolonge leur dur\u00e9e de vie.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">2. Lorsque l&#8217;air poussi\u00e9reux contient des substances acides, telles que le SOx, il peut \u00eatre n\u00e9cessaire d&#8217;y ins\u00e9rer des poudres alcalines, telles que le CaO, mais il est difficile au d\u00e9but d&#8217;obtenir la quantit\u00e9 appropri\u00e9e de mat\u00e9riau \u00e0 ins\u00e9rer, et si aucune couche de pr\u00e9-rev\u00eatement n&#8217;est appliqu\u00e9e, les sacs filtrants risquent de se corroder pr\u00e9matur\u00e9ment.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">3. De plus, la couche protectrice recouvrant la surface des sacs filtrants peut contribuer \u00e0 augmenter l&#8217;efficacit\u00e9 de filtration des nouveaux sacs filtrants.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Mais comment pr\u00e9-enduire les sacs filtrants avec la poussi\u00e8re d&#8217;aide \u00e0 la filtration ?<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Forte de sa longue exp\u00e9rience op\u00e9rationnelle, Zonel Filtech a formul\u00e9 les suggestions suivantes \u00e0 ses clients \u00e0 titre de r\u00e9f\u00e9rence\u00a0:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">a. Les travaux de pr\u00e9-rev\u00eatement doivent \u00eatre effectu\u00e9s avant l&#8217;allumage ou la production de la chaudi\u00e8re, et il faut arr\u00eater les syst\u00e8mes de purge et ouvrir la vanne d&#8217;entr\u00e9e d&#8217;air pour la poussi\u00e8re.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">b. Mettez le ventilateur en marche et augmentez progressivement le d\u00e9bit d&#8217;air jusqu&#8217;\u00e0 ce qu&#8217;il atteigne 70 % de la valeur nominale, puis enregistrez la r\u00e9sistance pour les diff\u00e9rentes chambres.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">c. Introduire la poussi\u00e8re de filtration par l&#8217;orifice d&#8217;acc\u00e8s du tuyau principal.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Comme d&#8217;habitude, la taille des particules de poussi\u00e8re de l&#8217;aide au filtrage est inf\u00e9rieure \u00e0 200 microns, la teneur en humidit\u00e9 est inf\u00e9rieure \u00e0 1 %, sans huile, la quantit\u00e9 de poussi\u00e8re \u00e0 ins\u00e9rer est de 350 \u00e0 450 g\/m2 selon la surface de filtration.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">d. Avant d&#8217;ajouter l&#8217;adjuvant de filtration, assurez-vous que le d\u00e9bit d&#8217;air est sup\u00e9rieur \u00e0 70 % du d\u00e9bit nominal et que la vanne de d\u00e9rivation est ferm\u00e9e et la vanne de levage ouverte. Apr\u00e8s l&#8217;ajout de l&#8217;adjuvant, le ventilateur doit fonctionner pendant environ 20 minutes afin de garantir une r\u00e9partition uniforme de l&#8217;adjuvant sur les sacs filtrants.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">e. Une fois les travaux de pr\u00e9-rev\u00eatement termin\u00e9s, la r\u00e9sistance augmentera normalement d&#8217;environ 250 \u00e0 300 Pa. Si la r\u00e9sistance n&#8217;augmente pas comme pr\u00e9vu, cela signifie que l&#8217;op\u00e9ration a \u00e9chou\u00e9 et il peut \u00eatre n\u00e9cessaire de r\u00e9p\u00e9ter les proc\u00e9dures.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">f. Une fois les travaux de pr\u00e9-rev\u00eatement termin\u00e9s, arr\u00eatez le ventilateur, l&#8217;inspecteur se rend au bo\u00eetier d&#8217;air propre pour v\u00e9rifier s&#8217;il y a des fuites, si oui, il peut avoir besoin de r\u00e9parations.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">g. Si aucune fuite n&#8217;est d\u00e9tect\u00e9e et que toutes les donn\u00e9es affich\u00e9es sont normales, alors le syst\u00e8me peut fonctionner conform\u00e9ment aux donn\u00e9es pr\u00e9vues, ouvrir le syst\u00e8me de purge et fonctionner normalement.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>What is the dust pre-coating works for bag filter housing? How to pre-coat the dust?<br \/>\nThe dust filter bags pre-coating or dust seeding means pre-coat the filter aid dust on the surface of the dust filter bags before the systems running normally when installed the new filter bags.<br \/>\nThe advantages as following: <\/p>\n","protected":false},"author":1,"featured_media":9829,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[123],"tags":[],"class_list":["post-9828","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites-du-secteur"],"_links":{"self":[{"href":"https:\/\/www.zonelenviro.com\/fr\/wp-json\/wp\/v2\/posts\/9828","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zonelenviro.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zonelenviro.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zonelenviro.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zonelenviro.com\/fr\/wp-json\/wp\/v2\/comments?post=9828"}],"version-history":[{"count":0,"href":"https:\/\/www.zonelenviro.com\/fr\/wp-json\/wp\/v2\/posts\/9828\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zonelenviro.com\/fr\/wp-json\/wp\/v2\/media\/9829"}],"wp:attachment":[{"href":"https:\/\/www.zonelenviro.com\/fr\/wp-json\/wp\/v2\/media?parent=9828"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zonelenviro.com\/fr\/wp-json\/wp\/v2\/categories?post=9828"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zonelenviro.com\/fr\/wp-json\/wp\/v2\/tags?post=9828"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}