Distributed energy small-scale seawater desalination system control method and its application device

Abstract

The invention discloses a distributed energy small-size seawater desalination system control method and a device for realizing the control method. The invention aims at providing a method which enables energy supply to be matched with stable operation modes of freshwater production capacity at any time, so as to guarantee the stable production of freshwater. The method comprises the following steps that: 1) the system is started up; 2) automatic scanning and detection are conducted, and when an external power grid or diesel engine power generation device is unavailable, the system automatically screens a fourth working mode; 3) a seawater desalination production working mode is started; 4) the system priorly adopts a first working mode for scanning; 5) when the system detects energy working conditions which cannot satisfy the first working mode, the system is automatically shifted to a second working mode; 6) when conditions cannot satisfy the second working mode, the system automatically enters the fourth working mode; and 7) when the fourth working mode is screened, the system enters a third working mode to start to produce freshwater. The distributed energy small-size seawater desalination system control method and the device for realizing the control method belong to the technical field of seawater desalination.

Description

technical field [0001] The invention discloses a seawater desalination system control method and its use device, in particular, a distributed energy small seawater desalination system control method and its use device, belonging to the technical field of seawater desalination. technical background [0002] Seawater desalination is the main source of water for people living on the coasts and islands of the world. Due to the large one-time investment and high operating cost of seawater desalination, the cost per unit of fresh water can be reduced only when a certain amount of fresh water is produced. Therefore, today's mainstream seawater desalination systems in the world are large and extra-large seawater desalination systems that produce thousands to tens of thousands of cubic meters of fresh water per day, or even hundreds of thousands of cubic meters of fresh water per day. However, some islands and reefs have small areas, small populations, and are far away from the land...

AI Technical Summary

Problems solved by technology

However, some islands and reefs have small areas, small populations, and are far away from the land. They cannot lay power grids, and are not suitable for and do not need to install large-scale seawater desalination devices. Secondly, it is impossible to install mobile equipment such as fishing boats, military ships, and coastal scattered residents. Large-scale seawater desalination system; existing commercialized small-scale seawater desalination devices have low water output and high operating costs, and require diesel generators to provide electricity. Due to the difficulty in ensuring the supply of traditional fuels such as diesel, this type of seawater desalination device is not completely suitable for islands , islands and reefs and other environments

There are also seawater desalination devices that use one or two energy sources. However, since the electric energy and thermal energy of various green energy sources such as solar energy, wind energy, and heat pumps are greatly affected by natural environmental factors, the supply status of electricity and heat is not stable. To ensure fresh water Stable production while minimizing energy consumption requires a well-designed control system, which is a problem that people have been considering

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