Monolithic Cast-In-Place Reinforced-Concrete Nozzle Floor And Adjustable Stemmed Nozzles
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QS-Type Nozziles For Underdrain Systems
The air-water backwash process for filter beds utilizes the thorough friction of expansion of the filter media layer and low-intensity water flushing, resulting in high media filter layer cleanliness and water savings. The selection of nozzles and the manufacture of nozzle floor are key to ensuring effective air-water backwashing.
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High-Precision Prefabricated Reinforced Concrete Nozzle Slabs
Nozzle slabs play a role in supporting the filter media layers and evenly distributing air and water in the underdrain system.
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In backwashing, especially in air-water backwashing processes, the key to uniform air and water distribution lies in the levelness of the nozzles, and its prerequisite is the levelness of the nozzle slabs.
ZCEN has developed an installation methodology using high-precision steel-mold reinforced concrete nozzle slabs with high-strength sealant-sealed jointing process, to overcome the drawbacks of poor levelness, poor air-tightness, and difficulty in vertically installing nozzles in conventional nozzle slabs. This technology has been widely adopted in new water plant installation and retrofitting and upgrading of existing water plants.
