Qualifizierungssystem Aktivkohlereaktivierung Stadtwerke Düsseldorf AG

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The reactivated carbon must comply with the requirements of DIN EN 12915-2, in particular: - Particle size (after sieving <0.6 mm): 8 x 30 mesh (0.6 - 2.36 mm) - Proportion of fine particles max. 5%, proportion of oversize particles max. 15% - Coefficient of uniformity U (d60/d10) should be <2.1 - Increase in iodine number by at least 200 mg iodine/g activated carbon in accordance with DVGW technical rule W 239. After reactivation, the iodine number must not be less than 750 mg iodine/g activated carbon. The iodine number of the used and the reactivated activated carbon is to be stated. - The test procedures according to DIN EN 12915-2, Section 8 “Test procedures” must be applied; or, if other procedures are used (ATSM, in-house procedures), it must be demonstrated that the comparability of the methods used with the test procedures specified in DIN EN 12915-2 is ensured. The contractor (AN) must attach an analysis certificate to each delivery of reactivated activated carbon, which specifies the parameters of the returned activated carbon (reactivated carbon and fresh coal). The following information is expected: - Particle size distribution according to EN 12902 -…

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