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Plant salt containing sea salt and method for preparing plant salt through process of removing heavy metal ions through extended aeration method

A technology for heavy metal ions and plant salts, applied in the field of development and utilization of plant salts, can solve the problems of poor aeration effect, high production cost, uneven aeration and the like, achieve uniform aeration effect, prolong service life and save production cost effect

Inactive Publication Date: 2016-08-17
王胜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) In the process of filtering brine with nanofiltration membrane, the production cost is high;
[0005] (3) In the process of removing heavy metals by aeration method, the aeration effect is not good and the aeration is uneven

Method used

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  • Plant salt containing sea salt and method for preparing plant salt through process of removing heavy metal ions through extended aeration method
  • Plant salt containing sea salt and method for preparing plant salt through process of removing heavy metal ions through extended aeration method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 Preparation of vegetable salt containing sea salt

[0031] Step 1. Preparation of refined brine

[0032] (1) Brine collection

[0033] The saturated brine concentrated after seawater sun-drying is taken out, introduced into the precipitation device, the pH value is adjusted at 7, and the precipitation is 7.5 hours. The supernatant liquid is taken to obtain pure brine. In the brine, the detected lead ion content is 30mg / L, the mercury ion content is 25mg / L, and the copper ion content is 30mg / L.

[0034] (2) filter

[0035] Mechanical filtration: The brine from which heavy metal ions have been removed is mechanically filtered to remove large solid impurities and mechanical impurities; the turbidity of the brine after mechanical filtration is 2NTU.

[0036] Nanofiltration: The mechanically filtered brine is subjected to nanofiltration treatment, the nanofiltration temperature should be controlled at 20°C, and the pressure should be controlled at 0.2MPa.

...

Embodiment 2

[0055] Embodiment 2 Preparation of vegetable salt containing sea salt

[0056] Step 1. Preparation of refined brine

[0057] (1) Brine collection

[0058] Take the saturated brine concentrated after seawater sun exposure, introduce it into the precipitation device, adjust the pH value at 8, settle for 7.5 hours, take the supernatant liquid to obtain pure brine. In the brine, the detected lead ion content is 35mg / L, the mercury ion content is 20mg / L, and the copper ion content is 35mg / L.

[0059] (2) filter

[0060] Mechanical filtration: The brine that removes heavy metal ions is mechanically filtered to remove large solid impurities and mechanical impurities; the turbidity of the brine after filtration is 3NTU.

[0061] Nanofiltration: The mechanically filtered brine is subjected to nanofiltration treatment, the nanofiltration temperature should be controlled at 22°C, and the pressure should be controlled at 0.5MPa.

[0062] The reducing agent sodium bisulfite is added to t...

Embodiment 3

[0081] Embodiment 3 Preparation of plant salt containing sea salt

[0082] Step 1. Preparation of refined brine

[0083] (1) Brine collection

[0084] Take the saturated brine concentrated after seawater sun exposure, introduce it into the sedimentation device, adjust the pH value at 9, settle for 8 hours, and take the supernatant liquid to obtain pure brine. In the brine, the detected lead ion content is 40mg / L, the mercury ion content is 20mg / L, and the copper ion content is 40mg / L.

[0085] (2) filter

[0086] Mechanical filtration: The brine that removes heavy metal ions is mechanically filtered to remove large solid impurities and mechanical impurities; the turbidity of the filtered brine is 4NTU.

[0087] Nanofiltration: The mechanically filtered brine is subjected to nanofiltration treatment. The nanofiltration temperature should be controlled at 24°C and the pressure should be controlled at 1MPa.

[0088] The reducing agent pyrosulfite is added to the nanofiltratio...

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Abstract

The invention provides plant salt containing sea salt. The plant salt is characterized in that the plant salt contains sea salt, the content of NaCl is 78-82%, the content of lead ions is smaller than or equal to 0.03 mg / kg, the content of mercury ions is smaller than or equal to 0.05 mg / kg, and the content of copper ions is smaller than or equal to 0.05 mg / kg. The invention further provides a method for preparing the plant salt through the process of removing heavy metal ions through an extended aeration method. The method is characterized by including the step of preparing refined bittern, wherein filtering is conducted and includes mechanical filtration and nanofiltration, nanofiltration temperature is 20-25 DEG C, and pressure is controlled to be 0.2-1.2 MPa. In the implementation process, the filtering process is advanced, the service life of a nanofiltration membrane is prolonged, the nanofiltration membrane is now replaced after being used 8-10 times instead of existing 2-5 times, and filtration production cost is greatly saved.

Description

technical field [0001] The invention relates to the development and utilization technology of plant salt in plants, in particular to a plant salt containing sea salt and a method for preparing the plant salt by removing heavy metal ions through an aeration method. Background technique [0002] Based on the consideration of national physical fitness and the needs of different groups of people, different types of edible salt have been gradually developed to replace or reduce the large intake of edible salt, and plant salt is one of them. Plant salt refers to a balanced salt that is extracted from plant organisms, uses purely physical processes and techniques, meets low-sodium salt and various mineral trace element groups, and the ratio of various elements meets the requirements of the human body. , Functional regulation, metabolism and health are new types of salts that have a certain promotion effect. Yet in the prior art, in the process of preparing edible salt, mainly ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L27/40A23L5/10
CPCA23V2002/00
Inventor 王胜
Owner 王胜
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