Temperature-sensitive water absorbent, water treatment method, and water treatment device

A sensitive, water-absorbing agent technology, applied in water/sewage treatment, heating water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as insufficient water absorption performance of water-absorbing agents, increased energy costs, and low osmotic pressure

Inactive Publication Date: 2021-04-09
JFEENG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, so-called temperature-sensitive water-absorbing agents such as extracted solutes or thermally phase-separated substances used in the above-mentioned prior art have problems in that the osmotic pressure is low and the water-absorbing performance as a water-absorbing agent is insufficient; or the phase-separation temperature is high and the energy cost is increased.

Method used

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  • Temperature-sensitive water absorbent, water treatment method, and water treatment device
  • Temperature-sensitive water absorbent, water treatment method, and water treatment device
  • Temperature-sensitive water absorbent, water treatment method, and water treatment device

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no. 1 Embodiment approach

[0114] Next, a water treatment device according to a first embodiment using the temperature-sensitive water-absorbing agent according to an embodiment of the present invention described above will be described. Figure 8 It is a block diagram schematically showing the water treatment device 1 of the first embodiment. Such as Figure 8 As shown, the water treatment device 1 of the first embodiment includes a membrane module 11 , a heater 12 , a separation tank 13 , a final treatment unit 14 , and heat exchangers 21 and 22 .

[0115] The membrane module 11 as a forward osmosis unit is, for example, a cylindrical or box-shaped container provided with a semipermeable membrane 11 a inside. The inside of the membrane module 11 is divided into two chambers by the semipermeable membrane 11a. The form of the membrane module 11 includes, for example, various forms such as a spiral module type, a laminated module type, and a hollow fiber module type. As the membrane module 11, a known...

no. 2 Embodiment approach

[0140] (Water treatment device and water treatment method)

[0141] Next, a water treatment device according to a second embodiment using the temperature-sensitive water-absorbing agent according to the embodiment of the present invention described above will be described. Figure 9 The water treatment device 2 of the second embodiment is shown. Such as Figure 9 As shown, the water treatment device 2 includes a membrane module 11 provided with a semipermeable membrane 11 a therein, a heater 12 , a separation tank 13 , a final treatment unit 14 , and heat exchangers 21 and 22 as in the first embodiment. In the water treatment device 2, different from the first embodiment, further, the downstream side of the heat exchanger 22 and the upstream side of the heater 12 along the flow direction of the diluted draw solution, and the flow direction of the regeneration draw solution A heat exchanger 23 is provided on the downstream side of the separation tank 13 and upstream of the he...

no. 3 Embodiment approach

[0145] (Water treatment device and water treatment method)

[0146] Next, a water treatment device according to a third embodiment using the temperature-sensitive water-absorbing agent according to the embodiment of the present invention described above will be described. Figure 10 The water treatment device 3 of the third embodiment is shown. Such as Figure 10 As shown, the water treatment device 3 includes a membrane module 11 provided with a semipermeable membrane 11 a inside, a heater 12 , a separation tank 13 , a final treatment unit 14 , and heat exchangers 21 , 22 , and 23 , as in the second embodiment. In the water treatment device 3, unlike the first and second embodiments, a branch point P is provided in the piping downstream of the membrane module 11 along the flow direction of the diluted draw solution. 0 . at branch point P 0 At this point, the diluted draw solution is branched in at least two directions, one pipe is connected to the heat exchanger 22 , and ...

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Abstract

A temperature-sensitive water absorbent which comprises a polyoxyalkylene adduct represented by general formula R1O(AO)nR2.. (1), the water absorbent being intended to attain a high osmotic pressure and a lower cloud point. In general formula (1), R1 is a residue formed by removing the hydroxyl group from a C6-13 monohydric alcohol; R2 is a hydrogen atom or a C1-13 alkyl or alkenyl group; AO is a C2-4 oxyalkylene group; and n, indicating the average number of moles of the alkylene oxide added, is 1-235, and when n is 2 or larger, then the two or more AO moieties may be the same or different. R1 may be a C6-13 aliphatic monohydric alcohol residue, aliphatic linear monohydric alcohol residue, or aliphatic branched monohydric alcohol residue.

Description

technical field [0001] The present invention relates to a temperature-sensitive water-absorbing agent for extracting water from an aqueous solution containing water as a solvent, and a water treatment method and water treatment device using the temperature-sensitive water-absorbing agent. Background technique [0002] Conventionally, various methods for extracting fresh water from seawater using semipermeable membranes are known. Specifically, a reverse osmosis method in which a pressure higher than the osmotic pressure is applied to seawater to forcibly pass water through a reverse osmosis membrane has been mainly developed. However, in the reverse osmosis method, seawater needs to be pressurized to a high pressure, so there is a problem of high equipment cost and running cost. Therefore, in recent years, a method has been developed in which a salt solution having a concentration higher than that of seawater is brought into contact with seawater through a semipermeable mem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/00C02F1/44C09K3/00
CPCC02F1/445C02F1/02C02F2209/02C02F2305/14B01D61/005B01D2311/103B01D61/0021B01D61/0023
Inventor 大里彩辻猛志渕上浩司户村启二藤原茂树功刀亮佐藤祐也渡边江梨中川正己浜口壮平久保康二
Owner JFEENG CORP
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