Method of drying salt by bubbling in seawater shallows
A seawater and bubbling technology, applied in the direction of alkali metal chlorides, etc., can solve the problems of carbon nanotube processing, separation and recovery difficulties, carbon nanotubes are easily blown away by wind, and the power consumption of salt drying is large, and realizes automation. The effect of operation and control, increasing the gas-liquid two-phase mass transfer area, and shortening the drying cycle
Active Publication Date: 2016-04-06
ZHEJIANG OCEAN UNIV
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Problems solved by technology
The spray method consumes a lot of power and the spray hole is easy to block. Although the use of carbon nanotubes can increase the evaporation rate of seawater by about 30%, it is very difficult to treat, separate and recycle the carbon nanotubes. If the carbon nanotubes are not treated , carbon nanotubes are easily blown away by wind
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[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation manners of the present invention will be further described in detail below.
[0028] see figure 1 , which is a top view of a seawater shoal bubbling salt drying device located in a salt field to realize the method of the present invention, which includes a bubbling tube array, a gas pipeline 32, a blowing device 31, and an automatic environmental monitoring and control system (not shown in the figure) , at least one layer of anti-seepage black film 1, fillers, etc., the above components will be described one by one below.
[0029] The anti-seepage black film 1 is laid on the bottom of the salt pan to prevent seawater from seeping into the salt pan and improve the utilization rate of light. It can be laid in multiple layers, such as two or three layers. In this embodiment, the anti-seepage black film 1 is a black high-density polyethylene anti-seepage fil...
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Abstract
The invention provides a method for evaporating seawater in the sun to make salt in a shallow by bubbling. The method comprises a salt pan water storing step and a bubbling salt extraction step, wherein the bubbling salt extraction step is as follows: when sunlight intensity, wind speed, air temperature, air humidity and seawater temperature meet the requirements, air-blasting equipment is opened to convey air to a bubbling pipe array arranged in a salt pan through an air conveying pipeline, the conveyed air is discharged from aeration holes in the bubbling pipe array to cause the seawater surface in the salt pan to constantly generate bubbles, and therefore seawater enters a bubbling tedding state; when the sunlight intensity, wind speed, air temperature, air humidity and seawater temperature do not meet the requirements, the air-blasting equipment is closed, and the seawater enters a natural tedding state. The method can shorten a salt making cycle, increases the yield of the salt pan, enhances the adaptability of the salt pan to bad weather, and increases the speed of evaporating seawater in the sun to make salt in the traditional method by 2-4 times.
Description
technical field [0001] The present invention relates to the field of salt drying by seawater evaporation, in particular to a method for bubbling salt drying in seawater shoals. The method applies the traditional bubbling operation process to concentrated seawater drying salt, and produces a large number of micro-bubbles and bubbles in the process of breaking Many tiny liquid droplets ejected during the process increase the contact area between the air and seawater, thereby accelerating the rate of seawater evaporation and drying of salt. Background technique [0002] my country has a long coastline, and sea salt drying in coastal areas is a traditional industry. Salt is not only an important living substance necessary for people's lives, but also an important raw material for the chlor-alkali industry, which is used to produce bulk chemical raw materials such as caustic soda, soda ash, and chlorine. Minerals such as potassium, bromine, and magnesium can also be extracted fro...
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IPC IPC(8): C01D3/06
Inventor 竺柏康王东光陶亨聪张乐丁波
Owner ZHEJIANG OCEAN UNIV