B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 24/02 (2006.01) B01D 24/24 (2006.01) B01D 24/46 (2006.01)
Patent
CA 2085680
AIR DUCT BLOCK FOR AIR/WATER UNDERDRAIN SYSTEMS IN GRAVITY FILTERS ABSTRACT OF THE DISCLOSURE An air duct block for air/water underdrain systems in gravity filters comprising a row of interconnected air duct blocks positioned below the filtering media and extending transversely to the underdrain laterals. Each air duct block is in communication with at least one adjacent individual underdrain filter block to supply backwash gas thereto during backwashing operations, thereby supplying backwash gas to its associated lateral. Each air duct block is in further communication with at least one adjacent air duct block such that backwash gas flows between the interconnected air duct blocks and along the row of air duct blocks. This system supplies backwash gas to the entire underdrain system through a single pipe from a source of supply.
Brown Marvin A.
F.b. Leopold Company Inc.
Sim & Mcburney
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