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Water treatment apparatus

A water treatment device and permeable water technology, applied in water/sewage treatment, water/sludge/sewage treatment, permeation/dialysis water/sewage treatment, etc., can solve the problems of RO membrane scaling and reduce the concentration of impurities , the miniaturization of the device, and the effect of achieving stable operation

Pending Publication Date: 2020-06-19
KURITA WATER INDUSTRIES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the previous recovery process, zinc, phosphoric acid, organic matter (Total Organic Carbon (TOC), chemical oxygen demand (chemical oxygen demand, COD)) were also concentrated by RO membrane, etc. Fouling

Method used

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  • Water treatment apparatus
  • Water treatment apparatus
  • Water treatment apparatus

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Experimental program
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Effect test

Embodiment 1

[0032]

[0033] pass figure 2 The shown circulating treatment device using NF membrane modules performs NF membrane filtration on the water samples collected from the actual machine circulating cooling water system for concentration treatment.

[0034] exist figure 2 , the water sample in the storage tank (tank) 20 is supplied to the NF membrane module 23 through the pump 21 and the piping 22 . Part of the water discharged from the pump 21 is sent back to the storage tank 20 through the pipe 29 . Concentrated water from the NF membrane module 23 is sent back to the storage tank 20 through a pipe 24 including a constant flow valve 25 . The permeated water of the NF membrane module 23 is introduced into the permeated water tank 27 from the pipe 26 , and the water amount is measured by a weight measuring device 28 .

[0035] By continuously operating the apparatus, the water in the storage tank 20 is gradually concentrated.

[0036] As the NF membrane, an NF membrane (hol...

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PUM

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Abstract

A water treatment apparatus comprising: an NF membrane module 4 with a selectively permeable membrane (NF membrane), which is for reception and permeation treatment of water from a water system 1 andis not permeable to useful components; an RO device 9 for de-ionization of the permeate from the NF membrane module 4; and a means for returning non-permeated water of the NF membrane module 4 and thepermeate of the RO device 9 to the water system 1.

Description

technical field [0001] The invention relates to a water treatment device for treating water from a water system and returning the treated water to the water system. Background technique [0002] In an open circulation cooling system, cooling tower blow off water is treated and the treated water is returned to the cooling tower (Patent Document 1, etc.). [0003] Recently, the industry has desired to reduce the amount of water used or to recover water, and it is also desired to recover the discharge water discharged outside the system in a system that performs water treatment, such as cooling water or a boiler. However, existing water recycling technologies also remove components that are effective for water treatment. There is a waste of energy or medicine due to excessive removal of components from the water. [0004] In the process of recovering cooling tower discharge water, pretreatment filtration (sand filtration, activated carbon, microfiltration (MF) membrane, etc.)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44B01D61/04B01D61/42B01D61/58C02F1/469
CPCB01D61/58B01D61/04C02F1/44C02F1/469B01D61/42
Inventor 高桥淳一
Owner KURITA WATER INDUSTRIES LTD