A system for seawater desalination treatment using geothermal resources and its treatment process

Abstract

The invention discloses a system and a treatment process for seawater desalination treatment using geothermal resources, including a seawater intake unit, a raw water pretreatment unit located below the sea level, a geothermal heat extraction unit, and a suitable water head drop with the raw water pretreatment unit The raw water replenishment unit, the reverse osmosis unit and the temperature difference driven fresh water lifting unit; the geothermal heating unit outputs heat energy to the temperature difference driven raw water replenishment unit and the temperature difference driven fresh water lifting unit respectively through the heating pipe; the seawater is firstly treated by the raw water pretreatment unit The raw water replenishment unit is driven by the temperature difference to pressurize and enter the reverse osmosis unit. After the seawater is desalinated by reverse osmosis, the raw water is separated into fresh water and concentrated brine. The fresh water and concentrated brine are upgraded by the temperature difference to realize the conversion of geothermal heat energy into water potential energy. , to solve the current social problems of fresh water shortage.

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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