Micro-energy subcritical seawater desalination method
A subcritical and seawater technology, applied in chemical instruments and methods, seawater treatment, water/sewage treatment, etc., can solve problems such as thermal pollution, high energy consumption, and concentrated salt pollution in water intake areas, and achieve marine ecology protection, low energy consumption, and The effect of protecting the global environment
Active Publication Date: 2022-05-13
吴启帆
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Problems solved by technology
However, a large amount (equivalent to more than 20 times the fresh water output) of low-temperature cooling water not only takes away a huge amount of waste heat, but also causes heat pollution and concentrated salt pollution to the water intake area; Destined to be a high energy consumption technology
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[0076] An embodiment of the micro energy consumption subcritical seawater desalination method of the present invention.
[0077] Take the small-scale subcritical seawater distillation and desalination equipment with a daily fresh water output of 125 tons as the basic unit for the implementation of the present invention: set the output of desalinated water to 125 tons per day, consider the pollution of concentrated seawater discharge, and integrate the characteristics of the present invention's micro energy consumption , it is suggested that the setting of the overall concentration ratio be 1 to 1, the input of clean seawater required by the basic unit is 250 tons / day (equivalent to a little more than 10 tons per hour), and the flow rate is 1 meter per second. In the working condition of the basic unit inputting seawater, the diameter of the pipe set should be 40 mm.
[0078] The relevant performance of the small-scale subcritical seawater distillation and desalination equipmen...
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The subcritical seawater distillation and desalination method with low energy consumption of the present invention comprises the following steps: (1) seawater pretreatment; (2) setting up a distillation space; (3) heating and pressurizing seawater, including (1) start-up working condition; (2) normal working condition; (4) waste heat utilization and Pressure can be recovered; (5) Desalinated water is obtained; the present invention mainly uses a multi-pipeline cavity and a sealed "distillation space", in which subcritical high temperature and supercritical pressure are set, and two cavity are set: 370°C The flowing liquid surface of condensed fresh water and the flowing liquid surface of hot sea water at 374.1°C; the two flowing liquid surfaces can carry out powerful grabbing in the "distillation space", and "grab" water vapor from the higher temperature liquid surface at a high speed, reaching The purpose of seawater desalination; the present invention fully utilizes and recycles waste heat and pressure energy, consumes a certain amount of energy only in the "startup working condition", and consumes little energy in the "normal working condition", which is the current energy-saving effect is very obvious A seawater desalination method.
Description
technical field [0001] The invention belongs to the technical field of seawater desalination, and relates to a subcritical seawater desalination method with low energy consumption. Background technique [0002] Clean fresh water has always been a scarce resource in countries all over the world. Therefore, "asking for fresh water" from the sea through seawater desalination technology has become a common method in some countries or regions. However, whether it is widely used seawater desalination technologies such as reverse osmosis membrane, low-temperature multi-effect, flash evaporation, or other seawater desalination processes that are under research or have not yet been applied on a large scale, almost all of them are high-energy-consuming technologies. Energy is also a scarce resource in the world at present. It is not a good way to exchange one scarce resource for another. Therefore, all countries are paying attention to and researching seawater desalination technolog...
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IPC IPC(8): C02F1/04C02F103/08
CPCC02F1/04C02F1/043C02F2103/08C02F2301/066C02F2303/10C02F2001/007C02F2209/42Y02A20/124
Inventor 吴启帆
Owner 吴启帆