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A method of using porous ceramic plates to sun-dry seawater salt

A porous ceramic plate and seawater technology, applied in the direction of energy input, alkali metal chloride, etc., can solve the problems of slow evaporation, large evaporation pool area, long salt production cycle, etc., and achieve small air flow resistance, large heat transfer area, Guaranteed to fully evaporate the effect

Active Publication Date: 2020-11-24
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of large evaporation pool area, slow evaporation, and long salt production cycle in the prior art, the present invention provides a method of using porous ceramic plates for seawater drying of salt

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Soak 10 porous heat-absorbing ceramic plates with a volume of 100×50×30 cm, a porosity of 50%, a pore diameter of 0.2–1 mm, and a water absorption rate of 35% in seawater with a salt content of 3.18% for 5 minutes. Transfer to the beach after soaking, under the action of sunlight and wind, the moisture in the pores of the porous heat-absorbing ceramic plate is evaporated, and after 6 hours, the porous heat-absorbing ceramic plate is placed on the top of the reservoir 1, and a 0.1 cubic meter of Seawater is used to flush the porous heat-absorbing ceramic plates with a high-pressure spray device. During the flushing process, the seawater absorbed by the porous heat-absorbing ceramic plates is sucked out by a vacuum pump, and the washing and suction are repeated. When the 10 porous heat-absorbing ceramic plates are washed, the water in the reservoir The salt content of seawater reaches 18.2%, and it is introduced into the crystallization pool to concentrate and make salt. ...

Embodiment 2

[0024] Soak 12 porous heat-absorbing ceramic plates with a volume of 100×50×30 cm, a porosity of 65%, a pore diameter of 0.2–1 mm, and a water absorption rate of 50% in seawater with a salt content of 3.18% for 8 minutes. Transfer to the beach after soaking, under the action of sunlight and wind, the moisture in the pores of the porous heat-absorbing ceramic plate is evaporated, and after 7 hours, the porous heat-absorbing ceramic plate is placed on the top of the reservoir 1, and 0.14 cubic meters of Seawater is used to flush the porous heat-absorbing ceramic plates with a high-pressure spray device. During the flushing process, the seawater absorbed by the porous heat-absorbing ceramic plates is sucked out by a vacuum pump, and the washing and suction are repeated. When the 10 porous heat-absorbing ceramic plates are washed, the water in the reservoir The salt content of seawater reaches 23.1%, and it is introduced into the crystallization pool to concentrate and make salt. ...

Embodiment 3

[0026] Soak 10 porous heat-absorbing ceramic plates with a volume of 100×50×30 cm, a porosity of 70%, a pore diameter of 0.2–1 mm, and a water absorption rate of 65% in seawater with a salt content of 3.18% for 5 minutes. Transfer to the beach after immersion, make the moisture in the pores of the porous heat-absorbing ceramic plate evaporate under the action of sunlight and wind, put the porous heat-absorbing ceramic plate on the top of the reservoir 1 after 8 hours, use 0.14 cubic meters of Seawater is used to flush the porous heat-absorbing ceramic plates with a high-pressure spray device. During the flushing process, the seawater absorbed by the porous heat-absorbing ceramic plates is sucked out by a vacuum pump, and the washing and suction are repeated. After the 10 porous heat-absorbing ceramic plates are washed The salt content of seawater reaches 24.6%, and it is introduced into the crystallization pool to concentrate and make salt.

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Abstract

The invention relates to a method for evaporating brine to obtain a salt by utilizing a porous ceramic plate. The method specially comprises the following steps: water in pores of the porous ceramic plate after absorbing seawater is evaporated by utilizing action of sunlight and wind power for precipitating the salt; and a certain amount of seawater is added to repeatedly wash the porous ceramic plate until the salt content of the seawater after washing reaches 15-26%, and concentration is performed to prepare the salt. The porous endothermic ceramic plate provided by the invention has a superior solar radiation absorption rate, can absorb solar radiation energy well, has good thermal conductivity and a two-dimensional or three-dimensional communication structure, can reduce air flow resistance, facilitates uniform distribution and stabilization of an air flow, has a high specific surface area, and ensures a large heat exchange area of a material; and the porous endothermic ceramic plate is utilized as an evaporation medium, so that the method solves the problem that a traditional method for evaporating brine to obtain a salt has a large evaporation tank volume and slow seawater evaporation, and shortens the cycle of evaporating the brine to obtain the salt.

Description

technical field [0001] The invention relates to the field of seawater evaporation and salt drying, in particular to a method for seawater drying of salt by using a porous ceramic plate. Background technique [0002] Extracting table salt from seawater is a traditional and ancient method that is still widely practiced today. First introduce seawater into the evaporation pool, use sunlight and wind to evaporate the water to a certain extent, then pour it into the crystallization pool, and continue to expose to the sun, the seawater will become a saturated solution of table salt, and then the salt will gradually precipitate out. The crystal is our common crude salt, and the remaining liquid is called mother liquor, from which multiple chemical raw materials can be extracted, such as potassium, magnesium, bromine and sulfate and other valuable minerals. [0003] The traditional salt drying method is to open up salt pans along the coast, rely on the natural evaporation of the sa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D3/06
CPCC01D3/06Y02P20/133
Inventor 刘阳
Owner QINGDAO UNIV
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