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Seawater desalination plant system

A technology for factories and seawater, applied in seawater treatment, comprehensive factory control, comprehensive factory control, etc., can solve the problems of high power consumption rate, power waste, large osmotic pressure difference, etc.

Inactive Publication Date: 2013-03-27
KK TOSHIBA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, when the seawater temperature is low, the required power consumption rate is large due to the opposite reason to the above.
In addition, when the salt concentration of seawater is high, the osmotic pressure difference between seawater and freshwater generated on the surface of the reverse osmosis membrane is large, and the required power consumption rate is large.
[0007] Therefore, if the seawater desalination plant is operated to maintain a constant amount of fresh water production, the amount of electric power per day (power consumption rate) used to obtain the target amount of fresh water will be wasted.

Method used

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  • Seawater desalination plant system

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no. 1 Embodiment approach

[0021] The seawater desalination plant system involved in this embodiment is as follows: figure 1 It includes the factory part 10 , the control device part 11 of the factory part 10 and the water distribution tank 20 shown. The factory section 10 takes in seawater, supplies the taken seawater to a reverse osmosis membrane, produces filtered water filtered by the reverse osmosis membrane as fresh water, and supplies the produced fresh water to consumers via the water distribution tank 20 . The control device unit 11 derives a water production plan for a certain period (for example, 24 hours) that minimizes the electric power consumption rate (electric power consumption rate) per unit of fresh water production, and controls the factory unit 10 based on the derived water production plan. .

[0022] exist figure 1 Among them, the factory unit 10 of this embodiment includes a pretreatment device 13 , a water supply pump 14 , a high pressure pump 15 , a booster pump 16 , a reverse...

no. 2 Embodiment approach

[0097] exist Image 6 In the controller unit 11 of the second embodiment shown, the figure 2 The controller unit 11 of the illustrated embodiment has a distribution tank water level monitoring unit 42 and a plan modification unit 43 added as functions. The actual measured water level of the distribution tank 20 measured by the water level measuring unit 44 is input to the distribution tank water level monitoring unit 42 .

[0098] The distribution tank water level monitoring unit 42 calculates the difference between the fresh water production volume per predetermined time of the optimal fresh water production volume plan obtained by the optimal plan calculation unit 34 and the demand per predetermined time predicted by the demand prediction unit 33. The predicted water level of the distribution tank 20 every predetermined time. The water level of the distribution tank 20 can be predicted by dividing the difference between the fresh water production and demand by the area of...

no. 3 Embodiment approach

[0103] Figure 7 The third embodiment shown does not have figure 2 The optimal plan calculation unit 34 and the optimal recovery rate calculation unit 35 in the first embodiment are shown. In the third embodiment, the operator determines the fresh water production amount plan and the recovery rate plan, and inputs the fresh water production amount plan to the data receiving unit 31 . In the present embodiment, the operator prepares in advance a plurality of daily fresh water production volume plans in which the daily fresh water production volume is allocated to every hour based on past empirical rules. Then, the operator selects the optimal freshwater production plan based on the day of the day, weather information, etc., and inputs the selected freshwater production plan to the data receiving unit 31 . In order to grasp whether the input fresh water production plan is good or not, the control device part 11 has a calculation unit 46 instead of the optimal plan calculation...

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Abstract

A seawater desalination plant system comprises a plant portion producing fresh water from seawater and supplying fresh water to consumers via a water distribution pool (20). In a seawater desalination plant system, a seawater quality prediction means (32) predicts quality of seawater for each predetermined time during a certain definite period based on a past actual measurement value of quality of seawater. In addition, an optimum plan calculation means creates a plurality of proposed plans of fresh water production quantity during the definite period in which fresh water production quantity required for the definite period is allotted to the each predetermined time, calculates, with respect to these, an electric power consumption rate for desalination using the seawater quality predicted for the each predetermined time, the fresh water production quantity, and a previously obtained recovery rate, and obtains an optimum fresh water production quantity plan from the plurality of proposed plans of fresh water production quantity based on this. A display means (36) displays the content of this obtained optimum fresh water production quantity plan.

Description

[0001] [Citation to related application] [0002] This application is based on Japanese Patent Application No. 2011-200922 (filing date: September 14, 2011), and enjoys priority benefits from this application. This application incorporates the entire contents of the above-mentioned application by referring to the above-mentioned application. technical field [0003] Embodiments of the present invention relate to a seawater desalination plant system that produces fresh water from seawater and supplies the produced fresh water to consumers via a water distribution tank. Background technique [0004] In recent years, seawater desalination plants for producing drinking water from seawater have been adopted as one of the countermeasures against water scarcity. Seawater desalination plants supply seawater to reverse osmosis membranes, filter seawater through reverse osmosis membranes to produce fresh water, and supply the produced fresh water to consumers through distribution tan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418C02F9/02C02F103/08C02F1/44
CPCC02F2303/24C02F1/008C02F2303/10C02F2209/006G05B13/026C02F2209/001C02F2209/40C02F1/441C02F2209/42C02F2103/08C02F2209/02G05B2219/32018Y02W10/30Y02P90/02Y02A20/131
Inventor 横川胜也难波谅松代武士山形英显黑川太
Owner KK TOSHIBA
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