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Method and device for desalting water

A desalination, brine technology, applied in chemical instruments and methods, seawater treatment, water/sewage treatment, etc.

Inactive Publication Date: 2004-03-31
阿洛伊斯沃本
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since it is hoped that this device will work uninterruptedly, but due to the magnitude of the stress, the time of action and the frequency of load changes, these main valves will be under large stress for a long time.

Method used

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  • Method and device for desalting water
  • Method and device for desalting water
  • Method and device for desalting water

Examples

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Embodiment Construction

[0024] figure 1 The schematic representation of the first pressure P 1 Next, brine 10 is fed to a feed pump 1 in the pressure compensation device 2 . The same brine 11 at high working pressure is sent from the pressure compensation device 2 to the diaphragm assembly 3 . A portion of the brine 11 (eg 25% brine 11 ) that passes through the membrane 6 is desalinated in the process and is discharged as desalinated water 12 . The remaining brine 11 (for example, 75%) cannot pass through the diaphragm 6 and uses the connecting line 5 as the still almost high pressure P 2 The concentrated brine 13 is returned to the pressure compensation device 2. This high pressure is added to the brine 10 fed into the pressure compensating device 2 and sent to the input of the diaphragm assembly 3 in a manner to be described. Simultaneously, this pressure is utilized in the manner to be explained in the pressure compensating device 2 , and finally the concentrated brine 14 there is discharged t...

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Abstract

The invention pertains to a method and a device for desalting water by reverse osmosis, particularly for desalting seawater, in which saltwater is introduced under a first pressure into a pressure-compensation device and conducted from pressure-compensation device at a second, higher pressure into a membrane module, wherein desalted water and concentrated saltwater are conducted out of membrane module, wherein the concentrated saltwater conducted out of membrane module is continuously introduced at roughly second pressure into pressure-compensation device and used there to apply roughly second pressure to saltwater introduced into pressure-compensation device and to introduce saltwater into membrane module, and wherein the introduction of concentrated saltwater into pressure-compensation device and the conduction of concentrated saltwater out of pressure-compensation device are accomplished by means of controlled main valves. The main valves are subject to high mechanical stresses, particularly during the opening and closing of the valves. To reduce or avoid these, it is provided according to the invention that secondary valves arranged in parallel with main valves are controlled such that load peaks during opening and / or closing of main valves are reduced.

Description

technical field [0001] The invention relates to a method for the desalination of water by means of reverse osmosis as stated in the preamble of claim 1; and also to a device for carrying out this method. Background technique [0002] Such a method and such a device are described in German Patent Application No. 19933147.2. Here, the brine is fed into the pressure compensating device under the action of the first pressure; and is sent from the pressure compensating device to a diaphragm assembly under the action of the second higher pressure; and the desalinated water and concentrated brine then remove it from the diaphragm assembly. Desalinated water is to be understood as water having a reduced salt content relative to the salt content of the brine fed into the device. In order to improve the efficiency and energy balance of this method and this device, it is proposed that under the action of the second pressure, the concentrated brine removed from the diaphragm assembly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44B01D61/02B01D61/06B01D61/12
CPCB01D61/06C02F2103/08C02F1/441Y02A20/131C02F1/44
Inventor 阿洛伊斯·沃本
Owner 阿洛伊斯沃本
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