System for seawater desalination through geothermal resources and treatment technology thereof

Abstract

The invention discloses a system for seawater desalination through geothermal resources and a treatment technology thereof.The system comprises a seawater obtaining unit, a raw water pretreatment unit located below the sea level, a geothermal heat obtaining unit, a raw water supplement unit, a reverse osmosis unit and a temperature difference drive fresh water lifting unit, and the raw water supplement unit and the raw water pretreatment unit have a proper head fall.The geothermal heat obtaining unit outputs heat energy to a temperature difference drive raw water supplement unit and the temperature difference drive fresh water lifting unit.Seawater is treated by the raw water pretreatment unit, then is pressurized by the temperature difference drive raw water supplement unit and enters the reverse osmosis unit, raw water is separated into fresh water and strong brine after the seawater is subjected to reverse osmosis desalination, the fresh water and the strong brine are lifted by means of temperature difference drive, conversion from geothermal heat energy to water potential energy is achieved, and the social problem of fresh water shortage at present is solved.

Description

technical field [0001] The invention belongs to the application fields of seawater desalination, geothermal energy and water potential energy, and particularly relates to a system and a treatment process for seawater desalination treatment using geothermal resources, and a new utilization and conversion method of geothermal energy. Background technique [0002] At present, international and domestic seawater desalination is mainly divided into two categories: distillation (thermal method) and reverse osmosis (membrane method). There are more than 20 specific seawater desalination technologies, including multi-stage flash evaporation, low-temperature multi-effect, reverse osmosis, and electrodialysis. , Compressed steam distillation, dew point evaporation, cogeneration of hydropower, cogeneration of thermal film and the use of nuclear energy, solar energy, wind energy, tidal energy, water column potential energy seawater desalination technology and so on. [0003] After half ...

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Problems solved by technology

[0005] In order to solve the technical problem of large heat or electric energy consumption in the process of seawater desalination and freshwater upgrading in the known technology, the present invention provides a system and its processing technology for seawater desalination treatment using geothermal resources. In the process of reverse osmosis seawater desalination, a large amount of clean energy from geothermal energy is introduced, which can use non-fuel and non-electricity combined with the natural water column potential energy of high-rise buildings and deep wells, combined with the method of using geothermal energy for seawater desalination and freshwater upgrading, to replace Ordinary methods of desalination of seawater by consuming electricity or fuel

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