Method and device for performing emulsion breaking on oil-water emulsion by ultrasonic wave

An oil-water emulsion and ultrasonic technology, applied in the direction of electric/magnetic dehydration/demulsification, etc., can solve the problems of inability to exert the ultrasonic demulsification effect, short ultrasonic action time, narrow application range, etc., to achieve good demulsification effect, demulsification Good milk effect and wide application range

Inactive Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantages and limitations are: the ultrasonic action time is extremely short, the effect is not obvious, and it must be used with an electric desalination device, and the application range is narrow
[0008] JP2290266, RU2268284, US5885424 and other patented technologies, the technological process is mainly to install the ultrasonic generator in an action area on the oil pipeline or pipeline, all of which belong to the online short-term ultrasonic effect, and cannot exert the maximum demulsification effect of ultrasonic waves

Method used

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  • Method and device for performing emulsion breaking on oil-water emulsion by ultrasonic wave
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  • Method and device for performing emulsion breaking on oil-water emulsion by ultrasonic wave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The raw material for the test is a mixture of crude oil and waste oil from a certain refinery. figure 1 In the process flow shown, a comparative test was carried out between the dehydration mode of single heat deposition and the joint action mode of ultrasonic-heat deposition, and the test data are shown in Table 1. Sedimentation dehydration method: Do not turn on the ultrasonic wave, the dehydration temperature is 50°C, and sample and analyze every 4 hours. Ultrasonic-heat deposition combined action mode: an ultrasonic distributor is designed on the top of the tank, using continuous ultrasonic action, the ultrasonic generator is a magnetostrictive generator, the frequency is 20kHz, and the sound intensity is 5W / cm 2 , the dehydration temperature was 50°C, and sampling and analysis were carried out at intervals of 4 hours.

[0034] Table 1 Comparison of the dehydration method of single heat deposition and the combined action of ultrasonic and heat deposition Test tempe...

Embodiment 2

[0038] The test raw materials, technological process, ultrasonic action mode, frequency, sound intensity, and sampling interval are the same as in Example 1. The dehydration temperature of this comparison test is 60°C. The test data are shown in Table 2.

[0039] Table 1 Comparison of the dehydration method of single heat deposition and the combined action of ultrasonic and heat deposition Test temperature (°C) Settling time (h) Water content after heat deposition (%) Water content after ultrasonic heat deposition (%)

[0040]

[0041]

[0042] Comparing the data of simply using the heating sedimentation method and the ultrasonic-heat sedimentation combined method, it can be seen that, at the same sedimentation time, the water content after removal by ultrasonic is obviously better than that without ultrasonic.

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Abstract

The invention relates to a method for performing emulsion breaking on an oil-water emulsion by an ultrasonic wave. In the method, one or more ultrasonic generators are arranged in a raw material storage tank or a settlement tank in the gravity settling direction, only one ultrasonic generator acts in the direction of the same vertical line. An emulsion breaking device for implementing the method comprises the raw material storage tank or the settlement tank, and one or more ultrasonic generators are arranged at the bottom or/and top of the raw material storage tank or the settlement tank. The ultrasonic generators are distributed reasonably according to structural size and ultrasonic radiation areas, so that the ultrasonic generators cover comprehensively, and are prevented from being overlapped. The ultrasonic generators are connected with ultrasonic distributors, and one ultrasonic generator is arranged in one ultrasonic distributor. The action direction of the ultrasonic wave is the vertical direction and is consistent with the gravity settling direction, so the driving force is added in the oil-water settling direction, and the oil-water settling speed is accelerated. The device is uniform in ultrasonic wave energy distribution, excellent in emulsion breaking effect, simple in operation, convenient to run and maintain and low in running cost.

Description

technical field [0001] The invention relates to a method and device for pretreatment of crude oil (or dirty oil) in oil fields and refineries, belongs to the technical field of demulsification of oil-water emulsions, and can be widely used in oil exploitation and refining. Background technique [0002] In recent years, with the gradual reduction of petroleum resources and the continuous increase of people's demand for petroleum products, oilfield companies have been prompted to adopt various measures to increase oil production. The wide application of tertiary oil recovery technology has used reserves that were difficult to exploit in the past. The exploitation of these crude oil reserves , will inevitably lead to deterioration of crude oil properties. In particular, the extensive application of polymer flooding, multi-component composite flooding, and surface active flooding has resulted in intensified emulsification of heavy and poor-quality crude oil and stable emulsified...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/02
Inventor 张红宇苟社全达建文许金山常文之何宗华崔云梓
Owner CHINA PETROLEUM & CHEM CORP
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