Title:
METHOD OF OPERATING WATER SOFTENING APPARATUS AND WATER SOFTENING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2010/103640
Kind Code:
A1
Abstract:
Even in the case of using a raw water with bad qualities as the extrusion water, a processed water having a purity not exceeding the allowable leakage hardness can be surely acquired. At the same time, the water can be collected in a comparable amount to water softening apparatuses of other regeneration systems, thereby achieving a high economic efficiency. A sprit flow regeneration process using a raw water having a definite electrical conductivity (K≤1500 μS/cm) and a definite total hardness (H≤500 mg CaCO3/L), which comprises at least the following two modes: (a) a regenerant passing mode wherein an aqueous sodium chloride solution or an aqueous potassium chloride solution having a definite regeneration level (R=60 to 240 g/L-R) is passed through a resin bed at a definite regenerant concentration (C=5 to 15 wt% and a definite regenerant linear velocity (V1=0.7 to 2 m/s); and (b) a raw water extrusion mode, which follows the regenerant passing mode, wherein a raw water at a definite extrusion output (N=0.4 to 2.5 BV) is passed through a lower resin bed having a definite depth (D2:150 to 750 mm) at a definite extrusion linear velocity (V2=0.7 to 2 m/s). The above-described system is widely applicable to water softening apparatuses connected to instruments to which water having a low hardness should be supplied, for example, boiler apparatuses, reverse osmosis membrane apparatuses and so on.
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Inventors:
YONEDA TSUYOSHI (JP)
NAKAMURA SABURO (JP)
ABE HAJIME (JP)
MATSUTOMO SHINJI (JP)
WATANABE HAYATO (JP)
NAKAMURA SABURO (JP)
ABE HAJIME (JP)
MATSUTOMO SHINJI (JP)
WATANABE HAYATO (JP)
Application Number:
PCT/JP2009/054741
Publication Date:
September 16, 2010
Filing Date:
March 12, 2009
Export Citation:
Assignee:
MIURA KOGYO KK (JP)
YONEDA TSUYOSHI (JP)
NAKAMURA SABURO (JP)
ABE HAJIME (JP)
MATSUTOMO SHINJI (JP)
WATANABE HAYATO (JP)
YONEDA TSUYOSHI (JP)
NAKAMURA SABURO (JP)
ABE HAJIME (JP)
MATSUTOMO SHINJI (JP)
WATANABE HAYATO (JP)
International Classes:
B01J49/00; C02F1/42
Foreign References:
| JP2003299968A | 2003-10-21 | |||
| JP2007260574A | 2007-10-11 | |||
| JPS56105759A | 1981-08-22 | |||
| JPS6091246U | 1985-06-22 |
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