CN108579133B - Deoxidizing device and deoxidizing method for polymer solution - Google Patents
Deoxidizing device and deoxidizing method for polymer solution Download PDFInfo
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- CN108579133B CN108579133B CN201810330588.5A CN201810330588A CN108579133B CN 108579133 B CN108579133 B CN 108579133B CN 201810330588 A CN201810330588 A CN 201810330588A CN 108579133 B CN108579133 B CN 108579133B
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Abstract
The invention belongs to the technical field of liquid degassing, and particularly relates to a polymer solution deoxygenation device and a deoxygenation method, wherein the device comprises a gas source steel bottle, a buffer bottle, a spherical valve, a gas flowmeter, a glass conduit, a reagent bottle, a gas distributor, a puncture needle and a narrow-mouth glass bottle; the device is used for deoxidizing, the method comprises the first-stage deoxidizing and the deep deoxidizing, the problems that the deoxidizing is not thorough in a common deoxidizing mode and is not applicable to high-viscosity aqueous solutions are solved, the device is applied to deoxidizing of polymer solutions with high viscosity, the cost is low, the operation is convenient, the oxygen content can be reduced to be below 20ppb, and the minimum oxygen content can be reduced to be within 5 ppb.
Description
Technical Field
The invention belongs to the technical field of liquid degassing, and particularly relates to a polymer solution deoxygenation device and a polymer solution deoxygenation method.
Background
With the deep development of petroleum, tertiary oil recovery technology is widely applied, and polymer flooding is favored more and more. However, due to different reservoir conditions, the polymer may age during use, resulting in a decrease in the viscosity, etc., of the polymer. Therefore, in order to evaluate the aging resistance of the polymer, the aging stability of the polymer solution simulating the anaerobic conditions of the stratum needs to be evaluated indoors.
However, the polymer solution prepared in the room generally has high viscosity (more than 10cp), high oxygen content (up to 2-4 ppm), and the oxygen dissolved in the solution can generate peroxide free radicals under reservoir conditions, so that the polymer is subjected to thermo-oxidative degradation, thereby interfering the aging stability evaluation of the polymer. The conventional oxygen removing method needs to be heated to a certain temperature or needs to be stirred, and only can be suitable for tap water or low-viscosity solution, for high-viscosity polymer solution, the polymer is degraded by heating or mechanical stirring under the condition of oxygen, and the high viscosity of the solution can prevent oxygen from being separated out of the solution, so that the oxygen removing efficiency is low, and the oxygen removing requirement (below 20 ppb) is difficult to achieve. Therefore, a new set of apparatus and method is needed to reduce the dissolved oxygen content without degrading the polymer and reducing the viscosity of the polymer solution, so as to achieve the experimental conditions for evaluation. The invention carries out deoxygenation on the polymer solution under the conditions of no stirring and room temperature by reasonably designing the deoxygenation device and the process, has high deoxygenation efficiency and low cost, does not relate to chemical deoxygenation, has no influence on the viscosity of the polymer solution, does not degrade the polymer, can thoroughly deoxygenate, has the oxygen content of 20ppb or less, and can be controlled within 5ppb or less.
Disclosure of Invention
Based on the defects of the prior art, the invention aims to provide the polymer solution deoxygenation device, and aims to provide the polymer solution deoxygenation method, which has the advantages of high deoxygenation efficiency, low energy consumption, no stirring and no influence on the performance of the polymer solution.
One of the purposes of the invention can be realized by the following technical scheme:
an oxygen scavenging device for polymer solutions comprising:
the device comprises a gas source steel bottle, a buffer bottle, a ball valve, a gas flowmeter, a glass conduit, a reagent bottle, a gas distributor, a puncture needle and a narrow-mouth glass bottle;
the gas source steel cylinder is connected with the buffer bottle through a rubber conduit, and the outlet of the buffer bottle is divided into two pipe orifices, namely a first pipe orifice and a second pipe orifice;
the first pipe orifice is connected with one end of the glass conduit through a silicone tube; the other end of the glass conduit is inserted into the reagent bottle; the mouth of the reagent bottle is sealed by a plastic packaging film, and an exhaust hole is only reserved at the glass guide pipe; the spherical valve and the gas flowmeter are sequentially arranged on a silicone tube in front of the glass guide tube;
the second pipe orifice is connected with the gas distributor through a silicone tube; the lower interface of each valve of the gas distributor is connected with a puncture needle head through a rubber tube, and the puncture needle head is inserted into the narrow-mouth glass bottle.
One of the purposes of the invention can be realized by the following technical scheme:
according to the polymer solution deoxygenation device, the lower interface of each valve of the gas distributor is connected with the puncture needle head through the rubber tube, and the joint is sealed by epoxy resin glue.
The second purpose of the invention can be realized by the following technical scheme:
the oxygen removing method of the oxygen removing device adopting the polymer solution comprises the following steps:
and (3) oxygen removal in the initial stage of S1: adding the polymer solution into a reagent bottle, opening a gas source steel bottle and a spherical valve, introducing inert gas into the bottom of the reagent bottle filled with the polymer solution through a glass conduit for 1-3h, subpackaging the treated polymer solution into narrow-mouth glass bottles, sealing the narrow-mouth glass bottles by rubber plugs and aluminum covers in sequence, and storing the narrow-mouth glass bottles in a normal-temperature water bath for later use;
s2 deep deoxygenation: and (3) opening the gas source steel cylinder and the valves on the gas distributor in sequence to blow out the inert gas from the puncture needle head, inserting the puncture needle head into the bottom of the narrow-mouth glass bottle filled with the polymer solution treated in the step S1, then inserting the other puncture needle head into the upper part of the liquid surface of the narrow-mouth glass bottle, and introducing the inert gas, wherein the ventilation time T1 is 2-5h, and the whole narrow-mouth glass bottle is immersed in water to be sealed in a water bath.
The second purpose of the invention can be realized by the following technical scheme:
according to the deoxygenation method of the deoxygenation device for the polymer solution, the inert gas is high-purity nitrogen or high-purity argon, and the purity is more than or equal to 99.999%.
The operating temperatures of the preliminary stage oxygen removal in the step S1 and the deep oxygen removal in the step S2 are both room temperature.
The speed of introducing the inert gas in the step S1 is 0.2L/min-0.6L/min.
The speed of introducing the inert gas in the step S2 is 0.1L/min-0.12L/min.
The viscosity of the polymer solution at room temperature is 10-300 cp.
Compared with the prior art, the invention has the following advantages:
the invention can be used for removing oxygen from polymer solution with viscosity below 300 cp. The whole deoxygenation process is carried out at room temperature, no stirring is carried out in the whole process, no metal and other devices which can degrade polymers are contacted, no expensive equipment such as glove boxes is used, no chemical deoxygenation agent is used, the cost is low, the operation is convenient, the performance of the polymer solution is not influenced, the polymers cannot be degraded, the deoxygenation efficiency is high (more than 99.9 percent), the deoxygenation is thorough, and the oxygen content in the polymer solution with the concentration of 3-8ppm can be reduced to 0-20 ppb.
Drawings
FIG. 1 is an oxygen removal device for a polymer solution in an embodiment of the present invention;
1: a gas source steel cylinder; 2: a buffer bottle; 3: a ball valve; 4: a gas flow meter; 5: a glass conduit; 6: a reagent bottle; 7: a gas distributor; 8: a puncture needle head; 9: a narrow-mouth glass bottle; 10: a first nozzle; 11: a second orifice;
FIG. 2 is a schematic view of the insertion of the piercing needle into the narrow-mouth bottle and the water bath process;
8: a puncture needle head; 9: a narrow-mouth glass bottle; 12: a puncture needle head; 13: a water bath cup.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art without any creative work based on the technical solutions of the present invention belong to the protection scope of the present invention.
EXAMPLE 1 oxygen removal device for Polymer solution
The method comprises the following steps: the device comprises a gas source steel bottle (1), a buffer bottle (2), a ball valve (3), a gas flowmeter (4), a glass conduit (5), a reagent bottle (6), a gas distributor (7), a puncture needle (8) and a narrow-mouth glass bottle (9);
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) is divided into two pipe orifices, namely a first pipe orifice (10) and a second pipe orifice (11);
the first pipe orifice (10) is connected with one end of the glass guide pipe (5) through a silicone tube; the other end of the glass conduit (5) is inserted into a reagent bottle (6); the mouth of the reagent bottle (6) is sealed by a plastic packaging film, and an exhaust hole is reserved only at the glass guide pipe (5); the ball valve (3) and the gas flowmeter (4) are sequentially arranged on a silicone tube in front of the glass guide tube (5);
the second pipe orifice (11) is connected with the gas distributor (7) through a silicone tube; the lower interface of each valve of the gas distributor (7) is connected with a puncture needle head (8) through a rubber tube, the joint is sealed by epoxy resin glue, and the puncture needle head (8) is inserted into a thin-mouth glass bottle (9).
EXAMPLE 2 insertion of puncture needle into narrow-necked bottle and Water bath method
The method of inserting the puncture needle into the narrow-necked bottle and the water bath method used in example 1 were as follows: and (3) inserting a puncture needle (8) into the bottom of the narrow-mouth glass bottle (9) filled with the polymer solution processed in the step (S1), then inserting another puncture needle (12) above the liquid level of the narrow-mouth glass bottle, and immersing the whole narrow-mouth glass bottle into a water bath cup for water bath sealing.
EXAMPLE 3 oxygen removal method for Polymer solution oxygen removal device
The method for oxygen removal using the oxygen removal device for polymer solution of example 1, comprising the steps of: and (3) oxygen removal in the initial stage of S1: adding the polymer solution into a reagent bottle at room temperature, opening a gas source steel bottle and a spherical valve, and introducing inert gas into the bottom of the reagent bottle filled with the polymer solution through a glass conduit at a rate of 0.2L/min; the aeration time is 1h, the treated polymer solution is subpackaged in a narrow-mouth glass bottle, a rubber plug and an aluminum cover are sequentially sealed, and the mixture is placed in a normal-temperature water bath for storage for later use;
s2 deep deoxygenation: at room temperature, sequentially opening a gas source steel cylinder and a valve on a gas distributor to blow inert gas out of a puncture needle head, inserting the puncture needle head into the bottom of a narrow-mouth glass bottle filled with the polymer solution treated in the step S1, then inserting the other puncture needle head into the upper part of the liquid level of the narrow-mouth glass bottle (the same as the embodiment 2), introducing the inert gas at the rate of 0.1L/min for 2h, wherein the whole narrow-mouth glass bottle is immersed in water to be sealed in a water bath; the inert gas is high-purity nitrogen with the purity of 99.999 percent.
The viscosity of the polymer solution at room temperature is 10cp, the dissolved oxygen concentration is tested by using a Kalimei R-7450 type oxygen measuring tube after the treatment is finished, and the oxygen concentration range is 15-20ppb when compared with a standard colorimetric tube.
Example 4 oxygen removal method for polymer solution oxygen removal device
The differences from example 3 are: the aeration time described in step S1 was 3 h.
The rate of introducing the inert gas in the step S1 was 0.6L/min.
The viscosity of the polymer solution at room temperature is 50cp, the dissolved oxygen concentration is tested by using a Kalimei R-7450 type oxygen measuring tube after the treatment is finished, and the measured oxygen concentration range is 10-15ppb compared with a standard colorimetric tube.
EXAMPLE 5 oxygen removal method for Polymer solution oxygen removal device
The differences from example 3 are: the aeration time described in step S1 was 1 h.
The rate of introducing the inert gas in the step S1 was 0.4L/min.
The aeration time described in step S2 was 4 h.
The rate of introducing the inert gas in the step S2 was 0.12L/min.
The viscosity of the polymer solution at room temperature is 100cp, the dissolved oxygen concentration is tested by using a Kalimei R-7450 type oxygen measuring tube after the treatment is finished, and the oxygen concentration range is 15-20ppb when compared with a standard colorimetric tube.
EXAMPLE 6 oxygen removal method for Polymer solution oxygen removal device
The differences from example 3 are: the aeration time described in step S1 was 2 h.
The rate of introducing the inert gas in the step S1 was 0.5L/min.
The aeration time described in step S2 was 4 h.
The rate of introducing the inert gas in the step S2 was 0.12L/min.
The viscosity of the polymer solution at room temperature is 100cp, the dissolved oxygen concentration is tested by using a Kalimei R-7450 type oxygen measuring tube after the treatment is finished, and the oxygen concentration range is 5-10ppb when compared with a standard colorimetric tube.
Example 7 oxygen removal method for Polymer solution oxygen removal device
The differences from example 3 are: the aeration time described in step S1 was 3 h.
The rate of introducing the inert gas in the step S1 was 0.6L/min.
The aeration time described in step S2 was 5 h.
The rate of introducing the inert gas in the step S2 was 0.12L/min.
The viscosity of the polymer solution at room temperature is 300cp, the dissolved oxygen concentration is tested by using a Kalimei R-7450 type oxygen measuring tube after the treatment is finished, and the oxygen concentration range is 0-5ppb when compared with a standard colorimetric tube.
EXAMPLE 8 oxygen removal method for Polymer solution oxygen removal device
The differences from example 3 are: the rate of introducing the inert gas in the step S1 was 0.6L/min.
The aeration time described in step S2 was 5 h.
The rate of introducing the inert gas in the step S2 was 0.12L/min.
The viscosity of the polymer solution at room temperature is 200cp, the dissolved oxygen concentration is tested by using a Kalimei R-7450 type oxygen measuring tube after the treatment is finished, and the oxygen concentration range is 0-5ppb when compared with a standard colorimetric tube.
EXAMPLE 9 oxygen removal method for Polymer solution oxygen removal device
The differences from example 3 are: the inert gas is high-purity argon with the purity of 99.999 percent.
The viscosity of the polymer solution at room temperature is 10cp, the dissolved oxygen concentration is tested by using a Kalimei R-7450 type oxygen measuring tube after the treatment is finished, and the oxygen concentration range is 15-20ppb when compared with a standard colorimetric tube.
Claims (1)
1. An oxygen scavenging device for polymer solutions comprising:
the device comprises a gas source steel bottle, a buffer bottle, a ball valve, a gas flowmeter, a glass conduit, a reagent bottle, a gas distributor, a puncture needle and a narrow-mouth glass bottle;
the gas source steel cylinder is connected with the buffer bottle through a rubber conduit, and the outlet of the buffer bottle is divided into two pipe orifices, namely a first pipe orifice and a second pipe orifice;
the first pipe orifice is connected with one end of the glass conduit through a silicone tube; the other end of the glass conduit is inserted into the reagent bottle; the mouth of the reagent bottle is sealed by a plastic packaging film, and an exhaust hole is only reserved at the glass guide pipe; the spherical valve and the gas flowmeter are sequentially arranged on a silicone tube in front of the glass guide tube;
the second pipe orifice is connected with the gas distributor through a silicone tube, the lower interface of each valve of the gas distributor is connected with a puncture needle through a rubber tube, the connection part is sealed by epoxy resin glue, and the puncture needle is inserted into the narrow-mouth glass bottle;
the oxygen removing method of the polymer solution oxygen removing device comprises the following steps:
and (3) oxygen removal in the initial stage of S1: adding the polymer solution into a reagent bottle, opening a gas source steel bottle and a spherical valve, introducing inert gas into the bottom of the reagent bottle filled with the polymer solution through a glass conduit for 1-3h, subpackaging the treated polymer solution into narrow-mouth glass bottles, sealing the narrow-mouth glass bottles by rubber plugs and aluminum covers in sequence, and storing the narrow-mouth glass bottles in a normal-temperature water bath for later use;
s2 deep deoxygenation: opening the gas source steel cylinder and the upper valve of the gas distributor in sequence to blow out the inert gas from the puncture needle head, inserting the puncture needle head into the bottom of the thin-mouth glass bottle filled with the polymer solution processed in the step S1, then inserting the other puncture needle head into the upper part of the liquid level of the thin-mouth glass bottle, and introducing the inert gas for 2-5 hours, wherein the whole thin-mouth glass bottle is immersed in water to be sealed in a water bath;
the operation temperatures of the preliminary stage deoxygenation in the step S1 and the deep deoxygenation in the step S2 are both room temperature, the speed of introducing the inert gas in the step S1 is 0.2L/min-0.6L/min, and the speed of introducing the inert gas in the step S2 is 0.1L/min-0.12L/min;
the inert gas is high-purity nitrogen with the purity of more than or equal to 99.999 percent or high-purity argon with the purity of more than or equal to 99.999 percent.
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| CN201810330588.5A CN108579133B (en) | 2018-04-13 | 2018-04-13 | Deoxidizing device and deoxidizing method for polymer solution |
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| CN201810330588.5A CN108579133B (en) | 2018-04-13 | 2018-04-13 | Deoxidizing device and deoxidizing method for polymer solution |
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Citations (6)
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| JP2010269287A (en) * | 2009-05-25 | 2010-12-02 | Immatek Corp | Method and apparatus for removing dissolved oxygen in liquid |
| CN202562790U (en) * | 2012-05-29 | 2012-11-28 | 中国石油天然气股份有限公司 | Deoxygenization visual device of polymer solution |
| CN104492125A (en) * | 2014-12-31 | 2015-04-08 | 大港油田集团有限责任公司 | Method for removing dissolved oxygen in viscous liquid |
| CN104857743A (en) * | 2014-02-21 | 2015-08-26 | 中国石油化工股份有限公司 | Polymer solution sealed deoxygenation device and method |
| CN104964867A (en) * | 2015-06-19 | 2015-10-07 | 北京东航科仪仪器有限公司 | Novel intelligent efficient polymer solution deoxidizing system |
| CN206660668U (en) * | 2017-03-29 | 2017-11-24 | 北京拓普莱博油气田开发技术研究院 | A kind of nitrogen charging polymer deaerating plant |
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2018
- 2018-04-13 CN CN201810330588.5A patent/CN108579133B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010269287A (en) * | 2009-05-25 | 2010-12-02 | Immatek Corp | Method and apparatus for removing dissolved oxygen in liquid |
| CN202562790U (en) * | 2012-05-29 | 2012-11-28 | 中国石油天然气股份有限公司 | Deoxygenization visual device of polymer solution |
| CN104857743A (en) * | 2014-02-21 | 2015-08-26 | 中国石油化工股份有限公司 | Polymer solution sealed deoxygenation device and method |
| CN104492125A (en) * | 2014-12-31 | 2015-04-08 | 大港油田集团有限责任公司 | Method for removing dissolved oxygen in viscous liquid |
| CN104964867A (en) * | 2015-06-19 | 2015-10-07 | 北京东航科仪仪器有限公司 | Novel intelligent efficient polymer solution deoxidizing system |
| CN206660668U (en) * | 2017-03-29 | 2017-11-24 | 北京拓普莱博油气田开发技术研究院 | A kind of nitrogen charging polymer deaerating plant |
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