Tenders Are Invited For Regenerated Activated Carbon – Qualification System For Activated Carbon Reactivation Stadtwerke Düsseldorf Ag

Regenerated Activated Carbon – Qualification System For Activated Carbon Reactivation Stadtwerke Düsseldorf Ag. The Reactivate Must Comply With The Requirements Of Din En 12915-2, In Particular: - Grain Size (After Screening <0.6 Mm): 8 X 30 Mesh (0.6 - 2.36 Mm) - Undersize Content Maximum 5%, Oversize Content Maximum 15% - Non-Uniformity Coefficient U (D60/D10) Should Be <2.1 - Increase The Iodine Number By At Least 200 Mg Iodine/G Activated Carbon In Accordance With Dvgw Rule W 239. The Iodine Number Should Not Fall Below 750 Mg Iodine/G Activated Carbon After Reactivation. The Iodine Number Of The Used And Reactivated Activated Carbon Must Be Stated. - The Test Procedures According To Din En 12915-2 Point 8 Test Procedures Must Be Used Or When Using Other Procedures (Atsm, In-House Procedures), The Comparability Of The Methods Used With The Test Procedures Specified In Din En 12915-2 Must Be Proven. The Contractor Must Include An Analysis Certificate With Each Delivery Of Reactivated Activated Carbon, Which Specifies The Information About The Returned Activated Carbon (Reactivate And Fresh Carbon). The Following Information Is Expected: - Grain Size Distribution According To En 12902 - Non-Uniformity Coefficient U According To En 12915-1 - Shake Density Or Bulk Density According To En 12915-1 (It Is Mandatory To Specify Which Parameter Is Being Determined.) - Spherical Hardness According To En 12915-1 - Iodine Number According To En 12902 (Of The Activated Carbon To Be Reactivated And The Reactivated Activated Carbon Without Makeup, Optional In Addition Also The Iodine Number Of The Resulting Return Delivery) - Ash Content According To En 12902 - Indication Of The Percentage Makeup Content In The Returned Coal (Corresponds To The Burning And Other Process Losses) - Name Of The Added Makeup Coal It Must Be Ensured That The Collected Batch Of Coal Is Not Mixed With Other Coals And That This Batch Is Therefore Safely Returned. To Do This, The Ag Must Be Provided With A Description Of The Reactivation Process In Order To Be Able To Understand This. Fresh Grain Activated Carbon As Make-Up Carbon For Drinking Water Treatment Based On Coconut Shells Or Based On Reagglomerated Hard Coal (Both Types Are Tested By The Client) As Make-Up Carbon For Reactivations With The Following Properties (All Information Refers To Din En 12902 Or Din En 12915) - Wettability / Floating Proportion Less Than Or Equal To 0.6% (M / M) - Grain Size 8 X 30 Mesh (0.6 - 2.36 Mm), Determined According To Din En 12902 - Undersize Content Maximum 5%, Oversize Content Maximum 15% (According To Din En 12915-1) - Vibration Density Approx. 530 Kg/M³, Bulk Density Approx. 460 Kg/M³, Determined According To Din En 12915-1 - Non-Uniformity Coefficient U (D60/D10). <1.9, Determined According To Din En 12902 - Ball Hardness >90, Determined According To Din En 12915-1 - Ash Content Maximum 15%, Determined According To Din En 12902 - Water Content On Delivery Max. 5% - Other Impurities And Secondary Components (See Din En 12915-1 Point 6.2.2 Impurities And Secondary Components Table 1): Max. 3% Water-Soluble Components, Max. 0.002 G Zinc / G Activated Carbon, Determined According To Din En 12902 - Maximum Contents