Method for carrying out oil dehydration by hydrophobic film

A hydrophobic membrane and oil technology, applied in the field of membrane separation, can solve the problems of non-continuous operation, large space occupation, high energy consumption, etc., and achieve the effects of not being easily polluted, easy to backwash, and low energy consumption

Inactive Publication Date: 2009-09-16
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The above-mentioned methods generally have defects such as large energy consumption, inability to operate continuously, taking up a large space, introducing new impurities, and high cost.

Method used

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  • Method for carrying out oil dehydration by hydrophobic film
  • Method for carrying out oil dehydration by hydrophobic film
  • Method for carrying out oil dehydration by hydrophobic film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A. Encapsulate the hydrophobic membrane in the plate membrane module (1) for use. The hydrophobic membrane is made of polytetrafluoroethylene (PTFE) membrane with a pore size of 1 μm and a porosity of 90%.

[0031] B. Add deionized water into the light oil, stir for 15 minutes, and prepare an oil-water mixture with a water content of 946 mg / L for use.

[0032] Put the above-mentioned light oil with a water content of 946mg / L into the raw material tank (2), stir continuously, and the temperature is 20°C, and use the pump (5) to transport the oil-water mixture from the feed port (6) into the membrane module (1 ), no additional pressure is applied, and the filtration is carried out by the static pressure of the oil-water mixture (the transmembrane pressure difference is about 0.001MPa). The filtration method is dead-end filtration, and the filtered oil is discharged and collected from the downstream outlet (7) of the membrane module into the container (4). The water cont...

Embodiment 2

[0035]A polytetrafluoroethylene hydrophobic membrane with a pore size of 2 μm and a porosity of 90% was selected, and aviation kerosene with an initial water content of 8356 mg / L was used. Other operations were the same as in Example 1. The water content of the filtered oil product is 286mg / L, and the water retention rate is 96.6%.

Embodiment 3

[0037] A polytetrafluoroethylene hydrophobic membrane with a pore size of 1 μm and a porosity of 80% was selected, and vacuum pump oil with an initial water content of 7683 mg / L was used, and other operations were the same as in Example 1. The water content of the filtered oil product is 360 mg / L, and the water retention rate is 95.3%.

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Abstract

The invention provides a method for removing free moisture or emulsified water by a hydrophobic film. In the method, the hydrophobic film is used as a filtering medium; petroleum products with higher content of water pass through the hydrophobic film under operating pressure which is not exceeding aqueous phase penetrating pressure by hydrophobic nature of the film; then moisture content is intercepted by the hydrophobic film, thus obtaining oil products with lower content of moisture. The method of the invention can be applicable to removal of moisture for many oil products avoiding of the effects of moisture content and temperature. The method of the invention is characterized in that removal of moisture content of the oil products can be carried out in real time in the process of oil delivery without adding any reagents, thus greatly reducing energy consumption, featuring in high dehydration rate and great operational flexibility; the whole manufacturing process is easy and large scale industrialized application of the method can be easily realized.

Description

Technical field: [0001] The invention relates to a method for removing moisture in oil products by using a hydrophobic membrane, and belongs to the technical field of membrane separation. Background technique: [0002] Water flooding is required in the post-production process of the oil field, resulting in the extracted crude oil containing a large amount of water. The water contained in the oil will change the physical properties of the oil, increase the transmission power, and bring difficulties to the post-processing process. [0003] During the processing of light oil, some improper operations will also cause the oil to contain a large amount of water. If the water directly enters the rectification tower in the downstream process without treatment, the pressure inside the tower will be caused by the vaporization of water. Excessive fluctuations affect normal production. [0004] During the refueling process of aircraft and other means of transportation, if the fuel cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D17/022C10G33/06
Inventor 张卫东李宪勇刘君腾任钟旗王曙光
Owner BEIJING UNIV OF CHEM TECH
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