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Apparatus and method for reverse osmosis

A reverse osmosis device and reverse osmosis technology, applied in chemical instruments and methods, reverse osmosis, osmosis/dialysis water/sewage treatment, etc., can solve the problems of low yield, high pressure, and high specific energy consumption of drinking water products

Inactive Publication Date: 2016-12-14
NANYANG TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reason why the specific energy consumption of the existing reverse osmosis process technology is high is that it requires high pressure and the yield of drinking water products is low

Method used

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  • Apparatus and method for reverse osmosis
  • Apparatus and method for reverse osmosis
  • Apparatus and method for reverse osmosis

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Embodiment Construction

[0038] The following reference Figure 1 to Figure 6, an exemplary embodiment of an energy-efficient reverse osmosis (EERO) process of the present invention is described, and the same reference numerals are used in each drawing to refer to the same or similar components.

[0039] Such as figure 1 As shown, in the first embodiment 103 of the EERO plant and process of the present invention, the high pressure retentate 10R of the SSRO stage 10 is fed to a counterflow membrane cascade CMCR unit 20 having two stages 21, 22, while the filtrate 21P The high pressure (retentate) side 22H of the second stage 22 is then recirculated from the first stage 21 . Since this embodiment is a hybrid configuration of one SSRO stage 10 and two stages 21 , 22 of CMCR units 20, it will be referred to hereinafter as the three-stage embodiment 103 of the EERO.

[0040] The SSRO stage 10 includes one or more reverse osmosis modules (not shown) connected in parallel. In the CMCR unit 20, each of the...

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Abstract

An apparatus for reverse osmosis, the apparatus comprising: a single-stage reverse osmosis (SSRO) unit; and a counter-current membrane cascade with recycle (CMCR) unit comprising a plurality of stages of reverse osmosis including at least a first stage and a second stage wherein permeate from the first stage is configured to be introduced as feed to the second stage; wherein retenate from the SSRO unit is configured to be introduced as feed to the first stage, and wherein product obtained using the apparatus comprises permeate from the SSRO unit and permeate from a last stage of the CMCR unit.

Description

technical field [0001] The invention relates to a reverse osmosis device and method for recovering products from aqueous solution. Background technique [0002] Under the pressure of world population expansion, population structure change and global climate change, it is necessary to continuously improve the supply efficiency of drinking water and reduce the supply cost of drinking water. In 2010, the World Water Council reported that one in six people in the world (1.1 billion people in 2010) lack access to safe drinking water. The ocean is an important water resource as it contains 97% of the water on Earth. However, seawater can contain up to 50,000 parts per million (ppm) of salt (sodium chloride), making it unsuitable for human consumption without treatment. Reverse osmosis (RO) has become a main technology for producing drinking water from seawater and inland salt water with a salt content of 500ppm-30000ppm. Reverse osmosis technology uses desalination membranes at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/02B01D61/58C02F1/44
CPCB01D61/08B01D61/12C02F1/441C02F2103/08Y02A20/131B01D61/026B01D2315/24B01D2317/022B01D2317/025B01D2317/04
Inventor 张智皓威廉·B·克兰斯卢秀玲
Owner NANYANG TECH UNIV
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