Near-field radiation solar evaporator capable of continuously desalting seawater and synchronously recovering salt

A solar vaporizer and near-field radiation technology, applied in the field of near-field radiation solar vaporizers, can solve the problems of reduced steam generation performance, discontinuous operation, loss of valuable mineral resources, etc., to reduce convection and radiation losses, and achieve positioning. The effect of crystallization and recovery, efficient positioning of crystallization and recovery

Pending Publication Date: 2022-05-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods can result in discontinuous operation or reduced steam generation performance due to convective heat loss
Additionally, high concentrations of salt diffuse into nearby solutions, losing access to valuable mineral resources

Method used

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  • Near-field radiation solar evaporator capable of continuously desalting seawater and synchronously recovering salt
  • Near-field radiation solar evaporator capable of continuously desalting seawater and synchronously recovering salt

Examples

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Embodiment

[0027] figure 1 A schematic diagram of a near-field radiation solar evaporator is shown. In the figure, the capillary moisture absorption tube continuously transports brine upwards to the mass transfer evaporator through capillary action. After evaporating into the evaporator, the brine diffuses radially due to capillary force. During the diffusion process, it receives heat radiation from full-spectrum absorption and infrared radiation photothermal converters. The temperature of brine continues to increase, resulting in evaporation. The resulting steam flows upwards, and when it comes into contact with the radiant emitters, it heats up again and becomes superheated steam. Eventually, superheated steam will diffuse into the environment through the openings in the light-transmitting insulation. In the evaporation pan, the radial concentration gradually increases due to the continuous evaporation of water. When the brine reaches saturation, salt crystals will precipitate at the...

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Abstract

The invention discloses a near-field radiation solar evaporator capable of continuously desalting seawater and synchronously recovering salt, and belongs to the technical field of seawater treatment by utilizing renewable energy sources. According to the near-field radiation solar evaporator, a light-transmitting heat-insulating layer, a full-spectrum absorption and infrared radiation photo-thermal converter, a radial mass transfer evaporation disc and supporting foam are sequentially fixed to a heat-insulating supporting pipe from top to bottom; the heat insulation supporting pipe is vertically fixed to the center of the collecting disc. The longitudinal mass transfer capillary pipette is directly connected with the evaporation disc; the full-spectrum absorption and infrared radiation photo-thermal converter is fixed at the bottom of the light-transmitting thermal insulation layer; and the salt crystallization product collecting tray plays a role in collecting crystallization products and supporting the whole device. Solar energy is converted into heat energy to drive efficient phase change evaporation by utilizing the principles of photo-thermal conversion and near-field radiation, the problem of surface scaling and blockage of the photo-thermal converter is effectively avoided in the physical mechanism, continuous clean water production and synchronous salt recovery are realized, and the method has important significance on construction of a renewable energy source system.

Description

technical field [0001] The invention belongs to the technical field of seawater treatment using renewable energy, in particular to a near-field radiation solar evaporator for sustainable seawater desalination and synchronous salt recovery. Background technique [0002] The fresh water crisis is an increasingly prominent problem in today's society. The lack of fresh water has a huge impact on the daily life and industrial production of about two-thirds of the world's population. Desalination of seawater is the key way to alleviate the shortage of water resources at present. However, seawater desalination plants produce concentrated brine, which is seriously harmful to terrestrial vegetation and aquatic ecosystems, and related technologies directly or indirectly rely on fossil fuel combustion, which will lead to various environmental problems including global warming and air pollution. Solar water treatment technology is widely regarded as one of the sustainable solutions to ...

Claims

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Application Information

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IPC IPC(8): C02F1/14C02F103/08
CPCC02F1/14C02F2103/08C02F2303/22Y02A20/212
Inventor 刘国华王琳冯义钧王翰文
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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