{"id":869,"date":"2023-07-27T10:21:45","date_gmt":"2023-07-27T09:21:45","guid":{"rendered":"https:\/\/glosfume-com.stackstaging.com\/?post_type=case-studies&p=869"},"modified":"2023-08-21T14:10:07","modified_gmt":"2023-08-21T13:10:07","slug":"product-recovery-of-aluminium-coatings","status":"publish","type":"case-studies","link":"https:\/\/glosfume.com\/af-za\/case-studies\/product-recovery-of-aluminium-coatings\/","title":{"rendered":"Product recovery of aluminium coatings"},"content":{"rendered":"

Situation \/ Problem<\/h4>\n

Previous bag filter repeatedly caught fire resulting in significant down time and lost revenue<\/p>\n

Low temperature operating levels along with extremely high HCl caused high corrosion.<\/p>\n

High PVC plastic content producing HCl leading to CaCl2<\/sub> setting in filter using hydrated lime<\/p>\n

Solution<\/h4>\n

6 Glosfume filter pods operating as a system with high temperature ceramic elements<\/p>\n

Sodium bicarbonate sorbent injection system at high temperature instead of lime removed the product setting in filter<\/p>\n

Benefits<\/h4>\n

Handle gas flows of up to 30,000 actual m3<\/sup>\/hr<\/p>\n

Operate at temperatures exceeding 300o<\/sup>C<\/p>\n

Reduction of particulates from 400mg\/m3<\/sup> to 3mg\/m3<\/sup><\/p>\n

Reduction of HCl from 1000mg\/m3<\/sup> to 5mg\/m3<\/sup><\/p>\n

Results<\/h4>\n

In 2001 at a location in America a Glosfume high temperature ceramic filter system replaced an existing bag filter that suffered fires and severe corrosion due to low operating temperatures, combined with extremely high HCl levels, during aluminium scrap de-coating of plastic.<\/p>\n

The original Lime injection system provided inadequate HCI removal (due to PVC plastic) and led to problems with CaCI2<\/sub> \u2018setting\u2019 in the plant\u2019s filter house. The problem was eventually overcome by injection of sodium bicarbonate at 315o<\/sup>C operating temperature.\u00a0 Gas flow of up to 30,000 actual m3<\/sup>\/hr are treated in the six pod Glosfume hot gas ceramic filter system, reducing pollutants to atmosphere for particulates from 400mg\/m3<\/sup> to 3mg\/m3<\/sup> and HCl from 1000mg\/m3<\/sup> to 5mg\/m3<\/sup>.<\/p>\n

Plant is still operating on the original set of elements over 20 years later.<\/p>\n","protected":false},"excerpt":{"rendered":"

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