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W/O emulsion demulsification method

An emulsion and demulsification technology, applied in separation methods, chemical instruments and methods, liquid separation, etc., can solve the problems of difficult recovery, large equipment volume and high cost, and achieve wide application prospects, large processing capacity, and processing costs. low effect

Active Publication Date: 2020-07-28
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The equipment required for the gravity method is large, and it takes a long time and low efficiency to settle by gravity; the adsorption method, the flotation method and the chemical method all need to add chemical reagents, which is difficult to recycle, and is likely to cause secondary pollution to the environment; the biological oxidation method is harmful to the environment. Harsh requirements, unstable strains and high cost

Method used

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  • W/O emulsion demulsification method
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  • W/O emulsion demulsification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment discloses a demulsification device for the demulsification method of a W / O emulsion, such as figure 1 As shown, during use: put the abrasive particles and the W / O emulsion in the storage tank 15 before starting, and stir and mix them evenly with the agitator 16 . Connect the positive pole and the negative pole of the power generator 1 to the first insulated electrode 3 and the second insulated electrode 4 respectively through the insulated wire 2, insert the first insulated electrode 3 into the annular gap 21 through the socket 20 to the bottom end of the annular gap 21, and The bracket 6 is fixed, and the second insulated electrode 4 is inserted into the cyclone device through the oil outlet 5 to the bottom of the small cone section 19 and fixed by the bracket 6 . Close the valve of the liquid outlet 10 , inject the electrolyte solution into the annular gap 21 from the liquid inlet 7 and fill the annular gap 21 . The demulsification starts, the power g...

Embodiment 2

[0037] This embodiment discloses a method for demulsifying a W / O emulsion. The demulsification operation steps for a W / O emulsion include:

[0038] (1) Use a stirrer to evenly distribute the abrasive particles in the W / O emulsion, wherein the speed of the stirrer is 50-100r / min, and the W / O emulsion is stirred at a speed of 50-100r / min, On the one hand, in order to avoid the further emulsification effect of the W / O emulsion, on the other hand, the abrasive particles can be fully and evenly distributed in the W / O emulsion, and the abrasive particles are particles of hydrophilic and oleophobic materials. The hydrophilic and oleophobic material is silica material or zeolite material. The abrasive particles of this material can promote the full phase separation of oil and water; the particle size of the abrasive particles is 0.5mm-8mm, and the abrasive particles are The diameter of the abrasive particle should not be too large or too small. If the particle size of the abrasive par...

Embodiment 3

[0043]This example discloses a method for demulsifying a W / O emulsion based on Example 1 or Example 2. The specific steps are: abrasive particles: silicon dioxide particles; the W / O emulsion is : The organic phase is kerosene 2000mL + tributyl phosphate 3000mL, the internal water phase is wet-process phosphoric acid 1000mL, the volume ratio of oil and water is 5:1; the feed volume flow rate of W / O emulsion is 14.5L / min; NaCl solution; pulse electric field strength and frequency are 5kV / cm and 700Hz, respectively. The demulsification experiment was carried out under the above experimental conditions. After the demulsification, the oil-water two phases were respectively connected to a measuring cylinder through the hoses connected to the oil outlet and the water outlet, and the volumes of the oil-water two phases were read. The experimental results are shown in the table below. It can be seen from the table that the demulsification rate can reach 97.3%. Here, the demulsification...

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Abstract

The invention discloses a demulsification method of a W / O emulsion. The demulsification operation method of the W / O emulsion comprises the following steps that: hydrophilic and oleophobic abrasive particles are uniformly distributed in the W / O emulsion through a stirrer; a rotational flow field is generated in the mixture of the abrasive particles and the W / O emulsion by using a rotational flow device; an electrostatic field is generated in a mixture of the abrasive particles and the W / O emulsion by using a power generation device; under the synergistic effect of a rotational flow field, an electrostatic field and abrasive particles, collision is generated between the water drops, between the water drops and the abrasive particles and between the abrasive particles, the water drops are broken and coalesced and get close to the inner wall face of the rotational flow device to be gathered to form a continuous water phase, the continuous oil phase is gathered to the axis of the rotationalflow device to form an oil core, and finally oil-water phase separation is achieved. The method has the beneficial effects that special harsh conditions are not used, the work is reliable, the treatment capacity is large, the treatment cost is low, and continuous treatment can be realized; the abrasive particles are cheap and easily available, can be easily separated from a water phase, can be recycled, and have wide application prospects.

Description

technical field [0001] The invention relates to the field of heterogeneous phase separation, oil-water two-phase separation technology, in particular to a method for accelerating the demulsification of W / O emulsion through the synergistic effect of a swirling field, an electrostatic field and abrasive particles. Background technique [0002] At present, a large amount of W / O emulsion will be produced in industrial fields such as crude oil extraction and refining, aviation fuel production, food processing, and mechanical processing. If left untreated, it will reduce the quality of crude oil, corrode and damage pipelines and mechanical equipment, and direct discharge will seriously damage the environment and ecology. Effectively remove the water in the oil body and refine the oil products is always the goal pursued by researchers. [0003] Traditional demulsification methods include: gravity method, adsorption method, flotation method, biological oxidation method, chemical me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/04B01D17/06B01D17/05
CPCB01D17/047B01D17/041B01D17/06
Inventor 曹语晴金央李军周堃
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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