UPPER-LAYER CLEANING DEVICE FOR WATER TREATMENT DEVICE, AND METHOD FOR CLEANING WATER TREATMENT DEVICE FILTER LAYER

UPPER-LAYER CLEANING DEVICE FOR WATER TREATMENT DEVICE, AND METHOD FOR CLEANING WATER TREATMENT DEVICE FILTER LAYER

Water treatment apparatus includes raw water special air mixing nozzles (7); filtering tank (5) housing filter layer (4) including two layers of upper layer (2) and lower layer (3), the upper layer including a filter medium with a smaller specific gravity and a larger particle size than a filter med...

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Hauptverfasser: CAI HUI LANG, MIMURA HITOSHI, OIWA TADAO
Format: Patent
Sprache:eng
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PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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creator CAI HUI LANG
MIMURA HITOSHI
OIWA TADAO
description Water treatment apparatus includes raw water special air mixing nozzles (7); filtering tank (5) housing filter layer (4) including two layers of upper layer (2) and lower layer (3), the upper layer including a filter medium with a smaller specific gravity and a larger particle size than a filter medium of the lower layer; a water collection pipe (13) removing filtered water and supplying reverse cleaning water to the filter layer during reverse cleaning; drainage trough (12); and upper layer cleaning apparatus (10), in which the upper layer cleaning apparatus includes upper layer cleaning pipe support member (17), upper layer cleaning water pipe (18), surface-cleaning special air mixing nozzles (19), air suction pipe (20), and horizontal air pipes (31 and 32) and the raw water special air mixing nozzles (7) are attached to raw water inflow tank (70) provided on a part of the drainage trough (12)
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subjects PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
title UPPER-LAYER CLEANING DEVICE FOR WATER TREATMENT DEVICE, AND METHOD FOR CLEANING WATER TREATMENT DEVICE FILTER LAYER
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