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Desalination system

A desalination and water quality technology, applied in the field of desalination system, can solve the problems of difficult removal of dirt and the inability of medicines to reach semi-permeable membranes, etc.

Inactive Publication Date: 2015-03-18
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the accumulated amount of dirt is large, the medicine is blocked by the dirt, and the medicine cannot reach near the surface of the semipermeable membrane, making it difficult to remove the dirt.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] figure 1 It is a configuration diagram of main parts including a monitoring unit in the desalination system according to the first embodiment of the present invention. figure 1 neutralize figure 2 The same symbols are assigned to the same constituent elements. Desalination is achieved by supplying feed water 14 with a booster pump 16 to one side of the semi-permeable membrane element (RO membrane element) 10 installed in the pressure vessel 12, and separating the membrane into filtered water (fresh water) and high-concentration brine. Concentrated water 80 to achieve. In the pressure vessel 12 , since the pressure on one side of the semipermeable membrane must be maintained, the concentrated water 80 returns to normal pressure after passing through the valve or the energy recovery device 8 .

[0080] Such as figure 1 As shown, the structure of the pressure vessel 12 is as follows: 8 semi-permeable membrane elements 10 are arranged in series inside, and their centra...

Embodiment 2

[0110] Figure 6 It is a configuration diagram of main parts including the monitoring unit in the desalination system according to the second embodiment of the present invention. The same components as in Example 1 are assigned the same symbols. In this embodiment, a threshold value input unit 56 and a state evaluation calculation unit 60 are provided in the monitoring device 18 , which is different from the first embodiment.

[0111] The upstream filtered water 20 and the downstream filtered water 24 are separated by the filtered water separating unit 28 . Information related to these water quantities and water quality, that is, upstream side filtered water quantity information 46, upstream side filtered water quality information 48, downstream side filtered water quantity information 52, downstream side filtered water quality information 54, and supply water pressure information 50, As in the first embodiment, the index value calculation unit 40 is supplied.

[0112] The ...

Embodiment 3

[0120] Figure 7 It is a configuration diagram of main parts including a monitoring unit in a desalination system according to Embodiment 3 of the present invention. Components that are the same as in Example 1 are assigned the same symbols. This embodiment differs from the first embodiment in that a recommended value calculation unit 64 is provided in the monitoring device 18 .

[0121] Similar to Example 1, the upstream side filtered water 20 and the downstream side filtered water 24 are separated by the filtered water separation unit 28 . The information related to these water volumes and water quality, that is, the upstream side filtered water volume information 46, the upstream side filtered water quality information 48, the downstream side filtered water volume information 52, the downstream side filtered water quality information 54, and the supply water pressure information 50, supply index value calculation unit 40 .

[0122] The recommended value calculation part ...

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Abstract

There is provided a desalination system capable of monitoring a situation of a semipermeable membrane element in real time. A desalination system 15 includes a plurality of semipermeable membrane elements 10 accommodated in series in a pressure vessel 12, a first intake port 22 for intake of filtrate water from an upstream semipermeable membrane element 10 in the pressure vessel 12, a second intake port 26 for intake of filtrate water from a downstream semipermeable membrane element 10 in the pressure vessel 12, and a supervisory controller 18 that outputs an index correlated with fouling on the semipermeable membrane element 10 based on at least one of first water quantity 46, first water quality 48, second water quantity 52, and second water quality 54, the first water quantity 46 and first water quality 48 being quantity and quality of the filtrate water from the first intake port 22, and the second water quantity 52 and second water quality 54 being quantity and quality of the filtrate water from the second intake port 26.

Description

technical field [0001] The invention relates to a desalination system using seawater or salt water for desalination, in particular to a desalination system with a monitoring function. Background technique [0002] A water treatment system using a separation membrane has been paid attention to. Such a water treatment system includes, for example, a seawater desalination device, a salt water desalination device, etc. that perform filtration treatment using a semipermeable membrane. Semipermeable membranes, depending on their structure and usage, include reverse osmosis membranes and forward osmosis membranes. These semi-permeable membranes are manufactured from raw materials such as cellulose or polyamide. For example, when using a reverse osmosis membrane for seawater desalination, by applying a pressure higher than the osmotic pressure of seawater, the salt in the seawater does not pass through and only water passes through to obtain fresh water. [0003] However, organic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/44C02F103/08
CPCC02F1/008C02F1/56C02F1/5245C02F2209/001C02F2103/08C02F1/441C02F2209/02C02F1/444C02F1/66C02F2209/003C02F2209/005C02F2209/06C02F2209/40C02F2209/42C02F2209/05B01D61/025B01D61/12B01D63/12B01D65/02B01D2311/24B01D2321/168Y02A20/131
Inventor 阴山晃治三宅吉宜片桐幸徳市毛由希子幡宫重雄
Owner HITACHI LTD