{"id":2924,"date":"2022-08-01T01:43:12","date_gmt":"2022-08-01T01:43:12","guid":{"rendered":"https:\/\/clearwaterind.com\/une-carriere-de-calcaire-elimine-le-bassin-de-decantation-pour-acceder-aux-depots-de-reserve-grace-a-un-systeme-de-clarification-en-circuit-ferme\/"},"modified":"2022-09-27T22:24:36","modified_gmt":"2022-09-27T22:24:36","slug":"une-carriere-de-calcaire-elimine-le-bassin-de-decantation-pour-acceder-aux-depots-de-reserve-grace-a-un-systeme-de-clarification-en-circuit-ferme","status":"publish","type":"post","link":"https:\/\/clearwaterind.com\/fr\/une-carriere-de-calcaire-elimine-le-bassin-de-decantation-pour-acceder-aux-depots-de-reserve-grace-a-un-systeme-de-clarification-en-circuit-ferme\/","title":{"rendered":"Une carri\u00e8re de calcaire \u00e9limine le bassin de d\u00e9cantation pour acc\u00e9der aux d\u00e9p\u00f4ts de r\u00e9serve gr\u00e2ce \u00e0 un syst\u00e8me de clarification en circuit ferm\u00e9"},"content":{"rendered":"

\"Un<\/span><\/div><\/div><\/div>

Compagnie\u00a0: <\/b>Glasgow, Inc.
\n<\/b><\/span><\/p>\n

Lieu\u00a0:<\/b> King of Prussia, Pennsylvanie, \u00c9.-U.
\n<\/b><\/span><\/p>\n

D\u00e9fi\u00a0: <\/b>\u00c9liminer le bassin de d\u00e9cantation pour acc\u00e9der aux mat\u00e9riaux. Renvoyer l\u2019eau de fabrication clarifi\u00e9e pour la r\u00e9utiliser.
\n<\/b><\/span><\/p>\n

Traitement\u00a0: <\/b>Floculation et \u00e9paississeur clarificateur \u00e0 haut pouvoir de compactage
\n<\/b><\/span><\/p>\n

Capacit\u00e9\u00a0: <\/b>1800\u00a0gal\/min
\n<\/b><\/span><\/p>\n

Type d\u2019unit\u00e9\u00a0: <\/b>Pompes \u00e0 puisard et \u00e0 boue, LQ50, M800SS, syst\u00e8me de filtrage de l\u2019eau de dilution, syst\u00e8me de dosage AutoFloc, CW1400HC, puisard pour eau de d\u00e9cantation
\n<\/b><\/span><\/p>\n

R\u00e9sultats\u00a0: <\/b>Plus de 55\u00a0% m\/m boue, Plus de 90\u00a0%+ eau propre r\u00e9utilisable
\n<\/b><\/span><\/p>\n

Avantages\u00a0: <\/b>4 \u00e0 5 millions de tonnes de mat\u00e9riaux accessibles \u00e0 la vente. \u00c9conomie de temps et d\u2019argent par rapport \u00e0 l\u2019\u00e9pandage de boue dans le bassin de d\u00e9cantation.<\/span><\/p>\n<\/div><\/div><\/div><\/div><\/div>

Glasgow, Inc<\/a> est une entreprise d\u2019industrie lourde et de construction d\u2019autoroutes qui dessert la Pennsylvanie, le New Jersey et le Delaware. Ils servent les secteurs priv\u00e9 et public avec des projets qui incluent des a\u00e9roports, des stationnements, des autoroutes, des services publics, des barrages, des centrales nucl\u00e9aires, entre autres. Pour r\u00e9pondre \u00e0 la demande de ses services, l\u2019entreprise exploite plusieurs usines et carri\u00e8res d\u2019asphalte, dont la carri\u00e8re McCoy.<\/p>\n<\/div>

D\u00e9fi :<\/u><\/strong><\/span><\/h4>\n

La carri\u00e8re McCoy de Glasgow est une carri\u00e8re de calcaire qui traite 300 t\/h de calcaire broy\u00e9 par le biais de son installation de lavage des agr\u00e9gats. La carri\u00e8re est situ\u00e9e dans une zone urbaine de la ville de King of Prussia, juste \u00e0 l\u2019ext\u00e9rieur de Philadelphie. En raison de sa situation m\u00e9tropolitaine, Glasgow ne pouvait pas \u00e9tendre l\u2019empreinte de la carri\u00e8re et ne pouvait acc\u00e9der aux mat\u00e9riaux que sur le site actuel, ce qui devenait un d\u00e9fi.<\/p>\n

La plupart des mat\u00e9riaux restants de la carri\u00e8re se trouvent sous le bassin de d\u00e9cantation historique et la zone de transit de la production. Une grande partie de la carri\u00e8re a atteint la nappe phr\u00e9atique et Glasgow n\u2019a pas pu d\u00e9placer son bassin de d\u00e9cantation \u00e0 un emplacement du site. Il \u00e9tait clair qu\u2019ils devaient \u00e9liminer leur bassin de d\u00e9cantation pour acc\u00e9der aux mat\u00e9riaux et prolonger la dur\u00e9e de vie de leur carri\u00e8re.<\/p>\n<\/div>

<\/span><\/div>

\u00ab\u00a0Nous avons estim\u00e9 qu\u2019environ 4 \u00e0 5 millions de tonnes de mat\u00e9riaux se trouvaient sous le bassin\u00a0\u00bb, explique Jeff Frantz, vice-pr\u00e9sident de Glasgow. \u00ab\u00a0Cette partie du mat\u00e9riel ajoute \u00e0 elle seule environ sept ans de production.\u00a0\u00bb<\/p>\n<\/div>

<\/span><\/div><\/div><\/div>

Solution :<\/b><\/u><\/span><\/h4>\n

En f\u00e9vrier 2020, Glasgow a contact\u00e9 Clearwater avec l\u2019int\u00e9r\u00eat d\u2019\u00e9liminer les fines de leur eau de fabrication sans un bassin de d\u00e9cantation.<\/p>\n

\u00ab Nous avons examin\u00e9 les presses \u00e0 bande, et j\u2019avais visit\u00e9 quelques sites qui en \u00e9taient \u00e9quip\u00e9s, mais elles n\u00e9cessitent beaucoup d\u2019entretien et d\u2019attention. En plus, elles sont tr\u00e8s ch\u00e8res \u00bb, ajoute Jeff.<\/p>\n

\u00ab Je suis tomb\u00e9 sur Clearwater en ligne et j\u2019ai vu par hasard l\u2019\u00e9paississant clarifiant \u00e0 haut pouvoir de compactage, ce qui m\u2019a sembl\u00e9 int\u00e9ressant. J\u2019ai pass\u00e9 un coup de fil et j\u2019ai rencontr\u00e9 Joe, qui a commenc\u00e9 \u00e0 travailler avec moi pour d\u00e9terminer la faisabilit\u00e9. \u00bb<\/p>\n

Joe Lamb, l\u2019ing\u00e9nieur d\u2019application principal de Clearwater, a travaill\u00e9 avec Glasgow pour comprendre leur probl\u00e8me et la disposition du site. \u00ab Le projet de Glasgow a pr\u00e9sent\u00e9 plusieurs d\u00e9fis d\u2019application int\u00e9ressants \u00bb, dit Joe. \u00ab L\u2019installation de lavage principale se trouve bien en dessous et loin de l\u2019emplacement du clarificateur. Ils ont des veines d\u2019argile dans la carri\u00e8re et trois installations de lavage qui fonctionnent ensemble et ind\u00e9pendamment tout au long de la journ\u00e9e, ce qui modifie le d\u00e9bit, la concentration des solides et la consistance des solides. \u00bb <\/span><\/p>\n

Clearwater a recueilli des \u00e9chantillons d\u2019eau de fabrication pour comprendre la charge solide des fines et les granulom\u00e9tries. Les tests en bocal ont permis de d\u00e9terminer la chimie ad\u00e9quate du coagulant et du floculant polym\u00e8re pour acc\u00e9l\u00e9rer la vitesse de d\u00e9cantation des solides. Enfin, des tests de vitesse de d\u00e9cantation ont permis de v\u00e9rifier les taux de d\u00e9cantation et de compactage ainsi que les densit\u00e9s de sous-flux pour un clarificateur. <\/span><\/p>\n

Cette information coupl\u00e9e \u00e0 un d\u00e9bit de 1800 gal\/min a permis \u00e0 Clearwater de concevoir un syst\u00e8me de traitement des eaux de fabrication qui a permis \u00e0 Glasgow de supprimer son bassin de d\u00e9cantation. Le syst\u00e8me de clarification comprend : pompes \u00e0 puisard et \u00e0 boue, <\/span>clarificateur CW1400HC<\/a>, <\/span>syst\u00e8me coagulant LQ50<\/a>, <\/span>syst\u00e8me de polym\u00e8re sec M800SS<\/a>, <\/span>syst\u00e8me de dosage AutoFloc<\/a>, syst\u00e8me de filtrage de l\u2019eau de dilution des polym\u00e8res secs, et deux cellules \u00e0 boue avec un puisard.<\/span><\/p>\n

\"\" Cependant, la configuration du site de Glasgow a cr\u00e9\u00e9 deux d\u00e9fis. Premi\u00e8rement, l\u2019installation de lavage primaire se trouve \u00e0 90 pi en dessous et \u00e0 1150 pi de l\u2019emplacement du clarificateur, ce qui cr\u00e9e un TDH de 125. Un syst\u00e8me massif de distribution d\u2019eau propre et de collecte des boues a n\u00e9cessit\u00e9 la conception de Clearwater pour r\u00e9pondre \u00e0 cette contrainte historique. Deuxi\u00e8mement, ils voulaient utiliser l\u2019eau clarifi\u00e9e comme eau de dilution pour leur pr\u00e9paration de polym\u00e8re sec, car l\u2019eau de puits n\u2019\u00e9tait pas disponible et l\u2019eau de la ville \u00e9tait trop co\u00fbteuse.<\/p>\n

Pour r\u00e9pondre aux exigences de la configuration du site, Clearwater a con\u00e7u un puisard de 2250 gallons avec deux pompes \u00e0 boue de 75 HP en s\u00e9rie pour atteindre le clarificateur. Le niveau du r\u00e9servoir est automatis\u00e9 par un transducteur de niveau \u00e0 ultrasons, et le r\u00e9glage sur place a permis d\u2019obtenir un signal qui automatise les deux pompes.<\/p>\n<\/div>

<\/span><\/div>

Afin d\u2019utiliser l\u2019eau clarifi\u00e9e comme eau de dilution pour le syst\u00e8me de dilution des polym\u00e8res secs M800SS, Clearwater a install\u00e9 deux filtres \u00e0 poches et un filtre \u00e0 cartouche de 30 microns. Les filtres garantissent une eau de dilution propre pour pr\u00e9parer une solution de polym\u00e8re efficace et uniforme.<\/p>\n

Les pompes \u00e0 puisard et \u00e0 boue alimentent en continu l\u2019\u00e9paississeur clarificateur CW1400HC en eau sale. Le CW1400HC utilise une technologie de capteurs automatis\u00e9s pour contr\u00f4ler en continu le niveau de boue et son \u00e9vacuation.<\/p>\n

Le LQ50 pr\u00e9pare et dose un coagulant dans la ligne d\u2019arriv\u00e9e des boues du clarificateur. Et le M800SS pr\u00e9pare un polym\u00e8re sec en une solution liquide de floculation et le dose dans le centre du clarificateur.<\/p>\n<\/div><\/div><\/div>

<\/span><\/div><\/div><\/div>
<\/span><\/div><\/div><\/div>

Le trop-plein d\u2019eau clarifi\u00e9e provenant du clarificateur s\u2019\u00e9coule vers un r\u00e9servoir d\u2019\u00e9tage de 3000 gallons avant de retourner dans le processus de production.<\/p>\n

Le flux de boue provenant de l\u2019\u00e9paississeur clarificateur s\u2019\u00e9coule dans deux cellules \u00e0 boue, o\u00f9 il continue \u00e0 s\u2019ass\u00e9cher. L\u2019eau de d\u00e9cantation de la boue d\u00e9shydrat\u00e9e tombe dans un puisard et est pomp\u00e9e vers le clarificateur.<\/p>\n<\/div><\/div><\/div>

R\u00e9sultats :<\/span><\/u><\/b><\/h4>\n

Glasgow a \u00e9limin\u00e9 son bassin de d\u00e9cantation avec l\u2019\u00e9paississeur clarificateur CW1400HC de Clearwater et un syst\u00e8me complet de traitement des eaux.<\/p>\n

En supprimant son bassin de d\u00e9cantation, Glasgow peut d\u00e9sormais acc\u00e9der \u00e0 4 \u00e0 5 millions de tonnes de mat\u00e9riaux, pour un total d\u2019environ 48 \u00e0 70 millions de dollars \u00e0 la valeur actuelle du tonnage.<\/p>\n

\u00ab Une fois que le syst\u00e8me de clarification en marche, nous avons r\u00e9cup\u00e9r\u00e9 l\u2019espace du bassin de d\u00e9cantation et commenc\u00e9 \u00e0 acc\u00e9der aux nouveaux mat\u00e9riaux \u00bb, pr\u00e9cise Jeff.<\/p>\n

L\u2019\u00e9paississeur clarificateur produit une boue \u00e9paisse d\u2019environ plus de 55 % de solides en poids qui se d\u00e9shydrate rapidement dans les cellules \u00e0 boue. Le mat\u00e9riau d\u00e9shydrat\u00e9 est beaucoup plus facile \u00e0 manipuler et r\u00e9duit les co\u00fbts et le temps de manutention de Glasgow.<\/p>\n

Jeff remarque : \u00ab Nous avons commenc\u00e9, je crois, fin mars, peut-\u00eatre d\u00e9but avril, et nous avons nettoy\u00e9 la premi\u00e8re cellule \u00e0 boue la semaine derni\u00e8re et commenc\u00e9 \u00e0 nettoyer l\u2019autre cette semaine. Donc, on a travaill\u00e9 longtemps avant de nettoyer. \u00bb<\/p>\n

Glasgow a fonctionn\u00e9 pendant huit semaines avant de nettoyer sa premi\u00e8re cellule \u00e0 boue. L\u2019utilisation de deux cellules \u00e0 boue permet \u00e0 l\u2019une de se d\u00e9shydrater pendant que l\u2019autre se remplit.<\/p>\n

\u00ab Nous utilisions une pelle \u00e0 benne tra\u00eenante pour nettoyer l\u2019ancien bassin environ une fois par semaine, et nous devions manipuler le mat\u00e9riau deux fois en raison du temps n\u00e9cessaire \u00e0 la d\u00e9shydratation. La boue des cellules, elle, est chargeable, donc nous la mettons dans un camion et la d\u00e9versons par-dessus l\u2019un des hauts murs de la carri\u00e8re pour la r\u00e9cup\u00e9rer. C\u2019est beaucoup plus facile \u00bb, ajoute Jeff.<\/p>\n

Enfin, Glasgow peut r\u00e9utiliser son eau de fabrication dans un syst\u00e8me de clarification en circuit ferm\u00e9.<\/p>\n<\/div>

\"Un<\/span><\/div>

\u00ab\u00a0La relation avec Clearwater a \u00e9t\u00e9 bonne, dit Jeff. Nous avons une bonne communication, et si nous avons un probl\u00e8me, ils sont prompts \u00e0 r\u00e9pondre \u00e0 notre appel et \u00e0 nous aider si n\u00e9cessaire.\u00a0\u00bb<\/p>\n<\/div>

<\/i>T\u00e9l\u00e9charger l\u2019\u00e9tude de cas<\/span><\/a><\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":2778,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[76,75],"tags":[84,77,88,124,86,87,90,126,83,85,132,68,91,89,127,80,81,133,129,130,79,131],"class_list":["post-2924","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-etudes-de-cas","category-etudes-de-cas-de-clarificateur-stationnaire","tag-clarificateur","tag-clarificateurs-deau","tag-clarification-fr","tag-clarifier-fr","tag-clearwater-industries-fr","tag-coagulant-fr","tag-coagulation-fr","tag-dry-polymer-make-down-units-fr","tag-durabilite","tag-epaississeur","tag-flocculation-fr","tag-flocculation","tag-floculation","tag-matieres-en-suspension","tag-polymer-fr","tag-polymere","tag-sedimentation-fr","tag-suspended-solids-fr","tag-sustainability-fr","tag-thickener-fr","tag-unites-de-polymere-sec-de-dilution","tag-water-clarifiers-fr"],"yoast_head":"\nLa 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