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Deoxygenation device and deoxygenation method for polymer solution

A polymer solution and glass catheter technology, applied in separation methods, chemical instruments and methods, liquid degassing, etc., can solve problems such as high oxygen content, hindering oxygen precipitation, high viscosity, etc., and achieve high oxygen removal efficiency and easy operation Convenient and thorough oxygen removal effect

Active Publication Date: 2021-02-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the polymer solution prepared indoors generally has a relatively high viscosity (greater than 10cp) and a high oxygen content, which can reach 2-4ppm. The oxygen dissolved in the solution will generate peroxide radicals under the reservoir conditions, causing the Thermo-oxidative degradation of the polymer interferes with the aging stability evaluation of the polymer
Conventional oxygen removal methods need to be heated to a certain temperature or need to be stirred, which can only be applied to tap water or low-viscosity solutions. For high-viscosity polymer solutions, heating or mechanical stirring under oxygen-containing conditions will cause polymer degradation, and the solution will The high viscosity will hinder the precipitation of oxygen from the solution, making the oxygen removal efficiency low, and it is difficult to meet the oxygen removal requirements (below 20ppb)

Method used

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  • Deoxygenation device and deoxygenation method for polymer solution

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1 A kind of deoxygenation device of polymer solution

[0031] Including: gas source cylinder (1), buffer bottle (2), ball valve (3), gas flow meter (4), glass catheter (5), reagent bottle (6), gas distributor (7), puncture needle ( 8), narrow mouth glass bottle (9);

[0032] The gas source steel cylinder (1) is connected with the buffer bottle (2) through a rubber conduit, and the outlet of the buffer bottle (2) has two nozzles, namely the first nozzle (10) and the second nozzle ( 11);

[0033] Described first mouthpiece (10) connects an end of glass conduit (5) by silica gel tube; The other end of described glass conduit (5) is inserted in the reagent bottle (6); The described reagent bottle (6) The bottle mouth is sealed with a plastic film, and only vent holes are left at the glass conduit (5); the described spherical valve (3) and the gas flowmeter (4) are installed on the silicone tube before the glass conduit (5) successively;

[0034] The second noz...

Embodiment 2

[0035] Embodiment 2 The insertion method and water bath method of the puncture needle on the narrow mouth bottle

[0036] The insertion method and water bath method of the puncture needle used in embodiment 1 on the narrow-mouth bottle are: the puncture needle (8) is inserted into the bottom of the narrow-mouth glass bottle (9) of the polymer solution after step S1 treatment is housed, and then Another puncture needle (12) is inserted above the liquid surface of the narrow-mouth glass bottle, and the whole bottle of the narrow-mouth glass bottle is immersed in the water bath cup to carry out water bath sealing.

Embodiment 3

[0037] Embodiment 3 A kind of oxygen removal method of the oxygen removal device of polymer solution

[0038] The oxygen removal method of the oxygen removal device using the polymer solution of Example 1 includes the following steps: S1 initial stage oxygen removal: at room temperature, the polymer solution is added to the reagent bottle, the gas source steel cylinder and the ball valve are opened, and the gas is passed through the glass catheter Pass inert gas into the bottom of the reagent bottle containing the polymer solution, the rate of passing inert gas is 0.2L / min; the time of ventilation is 1h, divide the treated polymer solution into narrow-mouthed glass bottles, and use rubber The plug and the aluminum cover are sealed in turn, and stored in a normal temperature water bath for later use;

[0039] S2 deep deoxygenation: at room temperature, open the gas source steel cylinder and the valve on the gas distributor in turn to blow out the inert gas from the puncture nee...

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Abstract

The invention belongs to the technical field of liquid degassing, and in particular relates to a deoxygenation device and a deoxygenation method for a polymer solution. Dispenser, puncture needle, and narrow-mouth glass bottle; use this device to deoxygenate, the method is the initial stage of deoxygenation and deep deoxygenation, this method solves the problem that the general deoxygenation method is not complete and not suitable for high-viscosity aqueous solution , the present invention is applied to deoxygenation of polymer solutions with high viscosity, low cost, convenient operation, and can reduce the oxygen content to less than 20ppb, and the lowest can be reduced to less than 5ppb.

Description

technical field [0001] The invention belongs to the technical field of liquid degassing, and in particular relates to a deoxygenation device and a deoxygenation method for a polymer solution. Background technique [0002] With the deepening of oil extraction, tertiary oil recovery technology has been widely used, and polymer flooding has been favored more and more. However, due to the different reservoir conditions, the polymer may age during use, which reduces the viscosity and other properties of the polymer. Therefore, in order to evaluate the anti-aging performance of polymers, it is necessary to evaluate the aging stability of polymer solutions in the laboratory under simulated formation anaerobic conditions. [0003] However, the polymer solution prepared indoors generally has a relatively high viscosity (greater than 10cp) and a high oxygen content, up to 2-4ppm. The oxygen dissolved in the solution will generate peroxide radicals under reservoir conditions, making ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/00B01J19/14
CPCB01D19/00B01J19/14
Inventor 曹绪龙郭拥军祝仰文窦立霞徐辉何冬月庞雪君李海涛孙秀芝李彬
Owner CHINA PETROLEUM & CHEM CORP
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