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Emulsion continuous demulsification separation method based on magnetic particle dynamic bed

A technology of magnetic particles and separation methods, applied in separation methods, immiscible liquid separation, liquid separation, etc., can solve the problems of inability to achieve continuous demulsification, difficult direct engineering application, cumbersome modification work, etc., and improve demulsification efficiency. , Improve the water quality, strengthen the effect of shear and friction

Pending Publication Date: 2021-10-01
江苏绿赛格再生资源利用有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, functionalized modified nano-scale magnetic particles are mostly used for demulsification of magnetic particles. Due to the limitation of high cost and cumbersome modification work, relevant research is mostly limited to the scale of laboratory sequencing batch processing, which is difficult to directly apply to engineering, and cannot be realized. Continuous demulsification, while direct demulsification using micron-sized magnetic particles, which are inexpensive and require no specific modification work, has been rarely reported
On the other hand, the magnetic field, as the key force for the demulsification of magnetic particles, only plays a role in the process of separating droplets from the continuous phase, and plays a role in particles trapping droplets, promoting droplet coalescence and coarse-graining, and destroying the oil-water interface film. did not play a role in key steps such as

Method used

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  • Emulsion continuous demulsification separation method based on magnetic particle dynamic bed
  • Emulsion continuous demulsification separation method based on magnetic particle dynamic bed
  • Emulsion continuous demulsification separation method based on magnetic particle dynamic bed

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Using the installation and use method of the above-mentioned continuous emulsion breaking and separation device based on the dynamic bed of magnetic particles, the model emulsion sample whose oil phase is liquid paraffin and whose oil concentration is 10 g / L is processed. The rotational speed of the emulsifier is 13000 r / min, and the emulsification time is 5 minutes; add 2 g of magnetic particles with a particle size of 1 μm into the oil-water separation chamber, which is denoted as MP1.

[0071] Adjust the parameters of the magnetic particle control system as follows: channel 1: CMOS, phase 0°, amplitude 2.4V, frequency 2Hz; channel 2: CMOS, amplitude 2.4V, frequency 2Hz, dual channel phase difference 180°. Power amplifier magnification: 10.

[0072] Adjust the flow path parameters of the emulsion as follows: the dosage of particles is 2 g, the speed of the peristaltic pump is 2.1 rpm, and the flow rate is about 10 ml / min; the hydraulic retention time of the emulsion i...

Embodiment 2

[0079] Using the installation and use method of the above-mentioned continuous emulsion breaking and separation device based on the dynamic bed of magnetic particles, the model emulsion sample whose oil phase is liquid paraffin and whose oil concentration is 10 g / L is processed. The rotation speed of the emulsifier is 13000 r / min, and the emulsification time is 5 minutes; add 2 g of magnetic particles (marked as MP2) with a product particle size of 1000 mesh (≤14 μm) into the oil-water separation chamber.

[0080] The parameters of the magnetic particle control system, the parameters of the emulsion flow path, and the layout of the emulsion breaking and separation operation platform are the same as those in Test Example 1.

[0081] The present invention is following table 2 with the continuous operation effect of above-mentioned parameter, Figure 5 shown.

[0082] Table 2 is the continuous operation effect of embodiment 2:

[0083]

[0084] From the above-mentioned opera...

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Abstract

The invention relates to the technical field of waste emulsion treatment, and in particular, relates to an emulsion continuous demulsification separation method based on a magnetic particle dynamic bed. An emulsion continuous demulsification and separation device based on the magnetic particle dynamic bed is included; an alternating magnetic field is generated through a magnetic particle control system, so that magnetic particles are bound in a specific area in an emulsion flow path and do reciprocating motion, and the magnetic particle dynamic bed is formed; the emulsion passes through the dynamic bed in the direction perpendicular to the reciprocating motion of the particles, the magnetic particles collide with oil drops in the emulsion, the oil drops are captured, an oil-water interface film is damaged, oil drop coalescence is promoted, the coarse-grained demulsification and oil-water separation processes are completed, and the effects of continuously discharging water and discharging floating oil are achieved. The light transmittance of the emulsion can be improved to 95% or above from 5% or below, and the device has the characteristics of good effluent quality and stable operation, and solves the problems that continuous demulsification is difficult to realize, the magnetic field action is single, particles need specific modification, the demulsification efficiency is low and the like in magnetic particle demulsification research.

Description

technical field [0001] The invention relates to a method, in particular to a method for continuous demulsification and separation of emulsion based on a dynamic bed of magnetic particles. Background technique [0002] Under the leadership of the "Made in China 2025" action program, the consumption of high-quality metalworking fluids is increasing day by day with the rapid development of my country's precision machining industry. These metalworking fluids are recycled to become waste emulsions after they fail. Waste emulsions have Extremely high environmental pollution and ecological risk, belonging to hazardous waste (code HW09). The waste emulsion of mechanical processing contains a large amount of mineral oil and surfactant. The emulsion droplets are stably dispersed in the water phase as micro / nano-scale droplets under the oil-water interface film formed by the surfactant. It is more difficult to separate milk and oil from water. [0003] Chemical agent demulsification i...

Claims

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Application Information

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IPC IPC(8): B01D17/04
CPCB01D17/04B01D17/047
Inventor 薛佳杨文新贺梦凡彭开铭黄翔峰吴宝强熊永娇王宇
Owner 江苏绿赛格再生资源利用有限公司
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