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An island seawater desalination system and method

A technology for sea islands and heating water tanks, which is applied in seawater treatment, general water supply conservation, heating water/sewage treatment, etc. It can solve problems such as high electric energy costs, high stability requirements for booster pump power supply, and difficulty in meeting the requirements of island power supply. , to achieve the effect of ensuring safety and strong adaptability

Inactive Publication Date: 2015-09-09
GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the reverse osmosis method accounts for about 60% of the global seawater desalination market, the cost of electric energy is relatively high in the case of seawater desalination on islands. In the case of waste heat utilization, the cost of reverse osmosis is much higher than that of low-temperature multi-effect distillation.
In addition, the booster pump in the reverse osmosis system has high requirements for power supply stability, and it is difficult for island power supply with wind power as the main energy source to meet its requirements

Method used

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  • An island seawater desalination system and method

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Effect test

Embodiment 1

[0034] Such as figure 1 As shown, an island seawater desalination system includes a power supply control system, a diesel engine waste heat recovery system and a low-temperature multi-effect distillation system. The power supply control system includes a wind generator 1, a diesel generator 6 and a general controller 4, and a wind generator controller 2 connected to the wind generator 1, and a diesel generator connected to the diesel generator 6 to generate electricity machine controller 5, the inverter 3 connected respectively with the wind power generator controller 2 and the diesel generator controller 5; The controller 5, the inverter 3 and the user load 10 are connected.

[0035] The wind power generator controller 2 is used for outputting wind power, the diesel generator controller 5 is used for outputting diesel power, the inverter 3 converts wind power and diesel power into power requirements of user load 10 and then outputs it, and The general controller 4 distribut...

Embodiment 2

[0041] The island seawater desalination method in this embodiment is applicable to the situation where the wind power output is greater than the electric energy required by the user load 10 . An island seawater desalination method, using the island seawater desalination system described in embodiment 1, comprising the following steps: the wind power generated by the wind power generator 1 is output by the wind power generator controller 2, and the diesel power generated by the diesel generator 6 is generated by the diesel generator The output of the machine controller 5, and after the wind power or wind power and diesel power are converted into the power quality required by the user through the inverter 3, it is delivered to the user load 10 and the heating water tank 9 through the general controller 4.

[0042] When the output of wind power is greater than the demand of the user load 10, the master controller 4 passes the excess power into the heating water tank 9 for heating ...

Embodiment 3

[0044] The island seawater desalination method in this embodiment is applicable to the situation where the wind power output is equal to the electric energy required by the user load 10 . An island seawater desalination method, using the island seawater desalination system described in embodiment 1, comprising the following steps: the wind power generated by the wind power generator 1 is output by the wind power generator controller 2, and the diesel power generated by the diesel generator 6 is generated by the diesel generator The wind power or wind power and diesel power are converted into the power quality required by the user through the inverter 3, and then delivered to the user load 10 through the general controller 4.

[0045] When the wind power output is equal to the user's load demand, the general controller 4 cuts off the power supply of the heating water tank 9, and simultaneously the general controller 4 transmits a signal to the diesel generator controller 5, turn...

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Abstract

The invention discloses an island seawater desalting system and method. The island seawater desalting system comprises an electric power supply control system, a diesel engine waste heat recovery system and a low temperature multi-effect distillation system, wherein the electric power supply control system comprises a wind-driven generator and a controller thereof, a diesel generator and a controller thereof, an inverter and master controller; the diesel engine waste heat recovery system comprises a radiator, a heat exchanger and a temperature control three-way flow regulating valve; the low temperature multi-effect distillation system comprises a low temperature multi-effect distiller and a heating water tank. The island seawater desalting system and method disclosed by the invention have the advantages that an island wind / diesel hybrid power generating system focusing on wind generation and assisted by diesel generation is matched, and seawater is desalted through low temperature multi-effect distillation equipment and method; the seawater is desalted through residual wind power when wind power is sufficient, and the seawater is desalted through waste heat of a diesel generator when the wind power is insufficient; the desalting system and method are quite strong in adaptability to instable wind power, and are capable of desalting the seawater under different power supply modes.

Description

technical field [0001] The invention relates to the field of seawater desalination, in particular to an island seawater desalination system and method. Background technique [0002] my country has a long coastline, dotted with coastal islands. However, most of the islands are resource-short of water, and the total amount of fresh water is limited; and the island's power supply system is difficult to connect with the mainland power grid, and there are problems such as high prices and unstable power supply. Therefore, water and electricity supply is an urgent problem to be solved in the development of islands. [0003] The development of island wind energy is an important way to solve the power supply of islands. Wind speed is random in nature, but the output of wind turbines is proportional to the cube of wind speed, so wind power has strong instability. In addition, the correspondence between wind power output and load demand is poor. In my country, every July and August...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38F02G5/00C02F1/04C02F103/08
CPCY02A20/124Y02A20/141Y02E10/76Y02T10/12
Inventor 张凤鸣陈顺权冯东东徐士鸣杜如虚
Owner GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI
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