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Apparatus for producing pure water

A technology for manufacturing equipment and pure water, which is applied in the direction of osmosis/dialysis water/sewage treatment, electrodialysis, semi-permeable membrane separation, etc., and can solve the problems of increasing equipment cost of pure water manufacturing equipment

Inactive Publication Date: 2008-04-09
KURITA WATER INDUSTRIES LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

However, if such a heat exchanger is installed, the equipment cost of the pure water production device will increase

Method used

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  • Apparatus for producing pure water

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Embodiment Construction

[0017] The pure water manufacturing device of the first aspect or the second aspect senses the water temperature of the permeated water of the reverse osmosis device or the deionized water of the ionization device, and controls the water temperature of the reverse osmosis device or the ionization device based on the sensed water temperature. Feed water so that the water volume of the permeated water of the reverse osmosis device remains constant. By thus controlling the amount of water supplied to the reverse osmosis device, fluctuations in the amount of permeated water in the reverse osmosis device or deionized water in the ionization device can be prevented, and as a result, fluctuations in the amount of purified water can be prevented. Therefore, the pure water production device does not need to provide a heat exchanger on the upstream side of the reverse osmosis device, and thereby reduces the equipment cost of the pure water production device.

[0018] The purified water ...

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Abstract

Provided is an apparatus for producing pure water which can prevent the variation of the amount of the pure water produced, without the use of a heat exchanger. A raw water is first filtered by an activated carbon filtration device (1), and then, is sent to a reverse osmosis device (3) through a water pump (2) for a reverse osmosis device, to subject it to the demineralization treatment. The water having been subjected to the demineralization treatment in the reverse osmosis device (3) is contacted with a water quality sensor (4) having a water temperature sensor (4a) and then is sent to an electric deionization device (5), to subject it to the electric deionization treatment. The water having been subjected to the deionization treatment is contacted with a water quality sensor (6) having a water temperature sensor (6a) and then is taken out as a treated water (pure water). The detection signal of the water temperature sensor (4a) is input to a pump controlling circuit (7) and is used for controlling the amount or water supply of the pump (2) so as for the amount of the water permeating from the reverse osmosis device (3) to be constant.

Description

technical field [0001] The present invention relates to a pure water production device, in particular to a pure water production device for treating raw water through a reverse osmosis device and an electrodeionization device. Background technique [0002] As a system for producing pure water by treating industrial water, urban water, well water, or circulating water produced by semiconductor manufacturing processes, etc., known devices include a reverse osmosis device to treat raw water, and then use an ionization device to treat the device (for example, the following patent Literature 1 and 2). [0003] Patent Document 1: Japanese Patent Laid-Open No. 2003-1259 [0004] Patent Document 2: Japanese Patent Laid-Open No. 2001-29752 [0005] In a pure water manufacturing device that processes raw water with a reverse osmosis device and an ionization device to produce purified water, the temperature fluctuation of the water treated by the reverse osmosis device or the ionizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44B01D61/12B01D61/54B01D61/58C02F1/469
Inventor 小野田成一三轮昌之
Owner KURITA WATER INDUSTRIES LTD
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