Method for preparing sea salt applied to floating
A technology of sea salt and sea water, applied in the field of preparing sea salt for floating, can solve the problems of high production cost, short life, high cost of ion exchange membrane, and achieve the effect of low cost
Inactive Publication Date: 2018-07-31
STONE & RESOURCE INDS R&D CENT
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Problems solved by technology
[0003] Although this patent can remove sulfate and sodium chloride through anion and cation electrodialysis membranes to obtain mineral water with high calcium, magnesium, low sodium and low sulfate, however, the method of this patent has a small output and consumes a lot of water. Electric energy and equipment maintenance costs are high, and the electrodialysis membrane used is an ion exchange membrane that water molecules cannot pass through, and the ion exchange membrane has high cost and short life. In addition, due to the low total hardness of the mineral water, it further reduces its If it is processed to form sea salt for floating, there are problems such as high production cost, time-consuming and energy-consuming
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[0019] The present invention will be described in detail below with reference to the drawings and embodiments.
[0020] Refer to figure 1 An embodiment of the method for preparing sea salt for floating use of the present invention includes: step a, step b, step c, step d, and step e.
[0021] This step a is to introduce the deep seawater 10 with a depth of less than 200 meters and a total hardness of 6,500-7,500 into a filter 1 containing a micron membrane 11, which is located in the ocean clinoline layer, for filtration treatment, and the micron membrane 11 is used to remove the The suspended impurities in the deep seawater 10 form the treated seawater 20.
[0022] This step b includes procedure b-1 and procedure b-2. The procedure b-1 is to sequentially pass the treated seawater 20 through a plurality of filters 2 including the first water-permeable submicron permeable membrane 21, and perform a concentration treatment. The first water-permeable submicron permeable membrane 21 o...
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Abstract
The invention provides a method for preparing sea salt applied to floating. The method comprises the following steps: step a, filtering seawater to remove suspended impurities so as to form treated seawater; step b, removing sulfate radicals in the treated seawater and allowing the treated seawater to form a mineral solution with a total hardness of 3,000 to 4,500 by using a water-permeable submicron permeable membrane unit; step c, concentrating the mineral solution by using a nano-membrane unit to form a mineral concentrate with a total hardness of 10,000 or more; step d, subjecting the mineral concentrate to distillation treatment and filtration treatment so as to allow at least a part of sodium chloride to be precipitated and removed from the mineral concentrate, thereby obtaining a filtrate; and step e, subjecting the filtrate to distillation treatment, cooling treatment and filtration treatment to obtain the sea salt used for floating.
Description
Technical field [0001] The invention relates to a method for preparing a material for floating people, in particular to a method for preparing sea salt for floating. Background technique [0002] China Taiwan Patent Publication No. 200827301 discloses a method for preparing mineral water with high calcium and magnesium, low sodium and low sulfate. The method includes the following steps: (a) Use sand filtration or ultrafiltration to filter out impurities in the deep seawater; (b) Adjust the pH and total dissolved solids concentration of the deep seawater treated in step (a) to obtain a A first adjustment liquid with appropriate pH and total dissolved solids concentration; (c) a first nanofiltration device is provided to filter the first adjustment liquid to obtain a first nanofiltration passing water and a first nanofiltration respectively Concentrated water; (d) Adjust the pH value and total dissolved solids concentration of the first nano-filtered concentrated water formed in ...
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IPC IPC(8): C02F9/10C01D3/06C02F103/08
CPCC01D3/06C02F1/001C02F1/04C02F1/44C02F9/00C02F2103/08C02F2301/08
Inventor 林志善吴柔贤张峰明刘照荣马佩瑜
Owner STONE & RESOURCE INDS R&D CENT