Method and device for refining brine by air floatation method

A technology for refining brine and air flotation, which is used in chemical instruments and methods, flotation water/sewage treatment, water/sewage treatment, etc. It can solve the problem that the effect of reducing the turbidity of brine is not obvious and the concentration of suspended solids in the influent cannot be too high. , low removal rate of grease and colloids, etc., to reduce the dissolution equipment, prevent the blockage of salt crystals, and reduce the cost of salt products

Pending Publication Date: 2020-08-18
ENG TECH INST CO LTD OF CNSIC +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the sand filter device has a low removal rate of grease and colloid, and the decolorization effect is poor. It requires that the concentration of suspended solids in the influent water not be too high, otherwise it will cause excessive loss of water distributors in the device; sand filter The devices generally work in groups and in series, and occupy a large area. Due to its own structural requirements, it adopts the working method of backwashing, frequent flushing operations consume backwashing water, and the filter medium used needs to be replenished every year.
Other filtration equipment, such as bag filters, precision filters, etc., generally have certain requirements on the quality of solid impurities in the influent water, and the effect of reducing the turbidity of brine after filtration is not obvious
The use of membrane technology has higher requirements for membrane-fed brine. Saturated brine needs to be degreased and impurity-removed before entering the membrane to further refine brine. At the same time, considering the reasons of high investment and high daily maintenance costs, it is currently used in industrial salt and edible There are less applications in the field of salt

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  • Method and device for refining brine by air floatation method

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Embodiment 1

[0053] In this embodiment, the amount of seawater concentrated brine treated by the air flotation device is 250m 3 / h, the circulating water volume is 40% of the treated water volume, and the dissolved air pressure is 0.30Mpa.

[0054] After removing some impurities from the raw brine, the brine water body is introduced into the settling unit 1 (Dall settler) for sedimentation, and solid-liquid separation is carried out to obtain a preliminary clarified liquid, and the obtained impurities pass through the second discharge port 1-2 of the settling unit 1 Enter the sludge storage tank 6; introduce the preliminary clarified liquid into the first connection port 3-1-1 of the air flotation unit 3 through the first discharge port 1-1 of the settling unit 1, and pass through the remote automatic control system 5 Control the air flotation unit 3, control the brine water temperature at 30°C, and add the flocculant of the drug-dissolving unit 2 to the water pipeline connecting the settl...

Embodiment 2

[0061] The water volume of the air flotation device to treat the mine salt brine is 350m 3 / h, the circulating water volume is 45% of the treated water volume, and the dissolved air pressure is 0.30Mpa.

[0062] After the raw brine is reacted by adding lime, the brine water body is introduced into the settling unit 1 (Dall settler) for settlement, and solid-liquid separation is carried out to obtain a preliminary clarified liquid, and the obtained impurities pass through the second discharge port 1-2 of the settling unit 1 Enter the sludge storage tank 6; introduce the preliminary clarified liquid into the first connection port 3-1-1 of the air flotation unit 3 through the first discharge port 1-1 of the settling unit 1, and pass through the remote automatic control system 5 Control the air flotation unit 3, the water temperature is controlled at 25 ° C, and the flocculant of the drug dissolving unit 2 is added to the water pipeline connecting the settlement unit 1 and the air...

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Abstract

The invention belongs to the technical field of brine purification, and particularly relates to a method and a device for refining brine by an air floatation method. The air flotation technology is used for refining brine, so that the production efficiency of salt manufacturing and salt chemical enterprises can be improved, the cost of salt products can be reduced, the quality of the salt productscan be improved, the application field of the salt products limited by the product quality is widened, and a foundation is laid for application of the air flotation technology in the brine purification field. The air floatation method brine refining device provided by the invention can separate insoluble substances which are as small as 0.05 micron in water, and the insoluble substances are usedfor refining brine, so that the separation effect is good.

Description

technical field [0001] The invention relates to the technical field of brine purification, in particular to a method and device for refining brine by air flotation. Background technique [0002] At present, in the brine purification and refining production process, the brine purification methods and means are generally different according to the different brine components. 2+ , Mg 2+ After the reaction of ionic impurities, large-grain solids, such as mud, sand and other insoluble solid impurities, are removed through a sedimentation tank or a settler; one is to remove large-grain solids, such as mud, through a sedimentation tank or a settler without adding any chemicals. , sand, etc., and then pass the brine containing suspended solids and high turbidity into a sand filter device or other filtering equipment to achieve the purpose of reducing water turbidity or purifying water quality and removing impurities; there is another kind of brine purification in the above two On ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10
CPCC02F1/04C02F1/24C02F1/5236C02F1/56C02F9/00C02F2001/007
Inventor 赵淑芳王雁河朱国梁李成辛乃宏张仂孟兴智
Owner ENG TECH INST CO LTD OF CNSIC
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