CN113559558A - Device for reducing the dissolved oxygen content in polymer solutions or gel systems - Google Patents
Device for reducing the dissolved oxygen content in polymer solutions or gel systems Download PDFInfo
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- CN113559558A CN113559558A CN202010348798.4A CN202010348798A CN113559558A CN 113559558 A CN113559558 A CN 113559558A CN 202010348798 A CN202010348798 A CN 202010348798A CN 113559558 A CN113559558 A CN 113559558A
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- carrier
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- polymer solution
- dissolved oxygen
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- 239000001301 oxygen Substances 0.000 title claims abstract description 38
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 38
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229920000642 polymer Polymers 0.000 title claims abstract description 36
- 230000001681 protective effect Effects 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 10
- 229920000742 Cotton Polymers 0.000 claims description 6
- 238000013016 damping Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 12
- 238000005096 rolling process Methods 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 description 6
- 230000030279 gene silencing Effects 0.000 description 5
- 239000000835 fiber Substances 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003635 deoxygenating effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012784 inorganic fiber Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0042—Degasification of liquids modifying the liquid flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0073—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0073—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042
- B01D19/0078—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042 by vibration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The application provides a device for reducing the content of dissolved oxygen in a polymer solution or gel system, which comprises a base, a carrier arranged above the base and a vibration motor for driving the carrier to vibrate, wherein the carrier is provided with a plurality of placing grooves for placing containers filled with the polymer solution or gel system, the vibration motor is fixedly arranged at the bottom end of the carrier, and the base is provided with an elastic supporting piece for supporting the carrier; the luggage carrier further comprises a plurality of limiting structures used for limiting the front-back and left-right swinging of the luggage carrier. The device utilizes the vibration of the vibration motor during working, and utilizes the elasticity of the elastic supporting piece to vibrate the container up and down in the vibration process, so that the solution in the container rolls up and down. The effective oxygen removal of the solution at the middle part and the bottom part of the solution is intensified by the phenomenon of solution rolling caused in the process of vacuumizing the solution in a container under a closed condition.
Description
Technical Field
The application relates to the technical field of polymer solution oxygen removal, in particular to a device for reducing the content of dissolved oxygen in a polymer solution or a gel system.
Background
A large amount of oxygen is present in the polymer solution or gel, because when deoxygenating the polymer solution or gel system in the container, the solution on the surface is often deoxygenated due to the high viscosity of the solution, and oxygen in the solution to be deoxygenated cannot be removed effectively. The existing oxygen removal method is a process of repeatedly vacuumizing and filling nitrogen into a standing solution. However, this approach is not effective in reducing the oxygen content of the solution except at the surface of the solution.
Therefore, how to solve the problem that the existing oxygen removing method can only remove oxygen from the solution on the surface but cannot effectively remove the oxygen content in the solution is a key technical problem to be solved by the technical personnel in the field.
Disclosure of Invention
To overcome at least some of the problems of the related art, the present application aims to provide a device for reducing the dissolved oxygen content in a polymer solution or gel system, which can solve the problem that the existing oxygen removing method can only remove oxygen from the solution on the surface and cannot effectively remove the oxygen content in the solution.
The application provides a device for reducing the content of dissolved oxygen in a polymer solution or gel system, which comprises a base, a carrier arranged above the base and a vibration motor for driving the carrier to vibrate, wherein the carrier is provided with a plurality of placing grooves for placing containers filled with the polymer solution or gel system, the vibration motor is fixedly arranged at the bottom end of the carrier, and the base is provided with an elastic supporting piece for supporting the carrier; the luggage carrier further comprises a plurality of limiting structures used for limiting the front-back and left-right swinging of the luggage carrier.
Preferably, the limiting structure comprises a limiting plate fixedly connected with the base and a limiting rod fixed on the side wall of the carrier, a sliding groove is formed in the limiting plate, and the limiting rod is located in the sliding groove and can move up and down in the sliding groove.
Preferably, the container further comprises a silencing protective cover covering the carrier and the limiting structure, a plurality of through holes for the container filled with the polymer solution or the gel system to pass through are formed in the top wall of the silencing protective cover, and the plurality of through holes and the plurality of placing grooves are arranged in one-to-one correspondence.
Preferably, a sound insulation layer for sound insulation is arranged in the sound attenuation protective cover.
Preferably, the bottom end of the sound attenuation protective cover is detachably connected with the base.
Preferably, the elastic supporting member is a supporting spring, one end of the supporting spring is fixedly connected to the base, and the other end of the supporting spring is connected to the bottom end of the luggage carrier.
Preferably, the article carrier is of a cuboid structure, and at least one limiting structure is arranged on each of four side walls of the article carrier.
Preferably, a plurality of the elastic supporting members are arranged on the base, and the plurality of the elastic supporting members are uniformly distributed at the bottom end of the luggage carrier.
Preferably, four elastic supporting pieces are arranged on the base.
Preferably, the sound insulation layer is made of sound absorption cotton.
The technical scheme provided by the application can comprise the following beneficial effects:
the application provides a device for reducing dissolved oxygen content in polymer solution or gel system, including base, carrier and vibrating motor, the carrier sets up in the top of base, is provided with the elastic support piece who is used for supporting the carrier on the base, and vibrating motor fixed mounting is in the bottom of carrier for drive carrier vibrations, be provided with a plurality of standing grooves on the carrier, be used for placing the container that is equipped with polymer solution or gel system. The device utilizes vibrating motor vibrations at the during operation, and plus elastic support piece leads to the fact vibrations to polymer solution or gel system in the container, and the cooperation can cause the phenomenon that solution rolled just aggravated the effective deoxidization to solution middle part and bottom solution to the solution in the in-process of carrying out the evacuation to the solution in the container under airtight condition, can promote polymer solution or gel system in the container and reach oxygen-free or little oxygen condition. So set up, solved current deoxidization mode and can only carry out the deoxidization to the solution on surface and can't effectively get rid of the problem of the oxygen content in the solution.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram illustrating an apparatus for reducing the dissolved oxygen content in a polymer solution or gel system according to some exemplary embodiments;
fig. 2 is a perspective view of a sound-dampening boot, according to some exemplary embodiments.
In the figure:
1. a carrier; 2. a limiting rod; 3. a limiting plate; 4. a base; 5. an elastic support member; 6. a threaded hole; 7. a vibration motor; 8. a chute; 9. and a through hole.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus or methods consistent with aspects of the present application.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the contents of the invention described in the claims. The entire contents of the configurations shown in the following embodiments are not limited to those required as solutions of the inventions described in the claims.
Referring to fig. 1-2, the present embodiment provides a device for reducing the content of dissolved oxygen in a polymer solution or gel system, comprising a base 4, a carrier 1 and a vibration motor 7, wherein the carrier 1 is disposed above the base 4, the base 4 is provided with an elastic supporting member 5 for supporting the carrier 1, the vibration motor 7 is fixedly mounted at the bottom end of the carrier 1 for driving the carrier 1 to vibrate, and the carrier 1 is provided with a plurality of placing slots for placing a container containing the polymer solution or gel system. The device utilizes the vibration of a vibration motor 7 during working, an elastic supporting piece 5 is additionally arranged to vibrate a polymer solution or a gel system in a container, and the elasticity of the elastic supporting piece 5 is utilized to vibrate the container up and down in the vibration process to cause the solution in the container to roll up and down. The vacuum pumping device is matched under a closed condition to ensure that the phenomenon of solution rolling is aggravated in the process of vacuumizing the solution in the container, so that the effective oxygen removal of the solution at the middle part and the bottom part of the solution is intensified, and the polymer solution or gel system in the container can be promoted to achieve an oxygen-free or micro-oxygen condition.
It should be noted that if the polymer solution or gel system is too thick, the frequency of the vibration can be controlled by the adjustment knob of the vibration motor 7 to enhance the oxygen scavenging effect.
Wherein, a plurality of limit structures are arranged on the base 4 to limit the front-back and left-right swing of the object carrier 1, so that the object carrier 1 can only vibrate up and down.
So set up, solved current deoxidization mode and can only carry out the deoxidization to the solution on surface and can't effectively get rid of the problem of the oxygen content in the solution.
In the preferred scheme of this embodiment, limit structure includes limiting plate 3 and gag lever post 2, and limiting plate 3 fixed connection is on the up end of base 4, and gag lever post 2 fixed connection is provided with spout 8 on limiting plate 3 on the lateral wall of luggage carrier 1, and gag lever post 2 is located spout 8 to can reciprocate in spout 8. Like this, gag lever post 2 can only reciprocate along spout 8, and the lateral wall of spout 8 restricts gag lever post 2 and rocks to can restrict carrier 1 and rock. And the limiting structures act simultaneously, so that the carrier 1 is limited from shaking all around, and the carrier 1 can only shake up and down.
In one embodiment, the luggage carrier 1 is a rectangular parallelepiped structure, at least one limit structure is provided on four side walls of the luggage carrier 1 to limit the front-back and left-right swinging of the luggage carrier 1, specifically, the device has six limit structures, that is, a limit rod 2 is provided on each side wall with a small area of the luggage carrier 1, two limit rods 2 are provided on each side wall with a large area of the luggage carrier 1, the two limit rods 2 are arranged at a distance, six limit plates 3 corresponding to the limit rods 2 are provided on the base 4, and the six limit rods 2 are matched with the six limit plates 3 to limit the front-back and left-right swinging of the luggage carrier 1.
In another embodiment, the object carrier 1 may be a cylinder structure, and the device may be provided with three position-limiting structures, wherein the three position-limiting structures are uniformly distributed on the periphery of the object carrier 1 to limit the object carrier 1 to swing back and forth and left and right.
In another preferred embodiment of the present invention, the device further comprises a sound-absorbing protection cover, which covers the carrier 1 and the limiting structure to reduce the noise generated by the vibration motor 7.
Wherein, the roof of amortization safety cover is provided with a plurality of through-holes 9, and a plurality of through-holes 9 and a plurality of standing groove one-to-one set up to the container that supplies to be equipped with polymer solution or gel system passes places in the standing groove.
Preferably, a sound insulation layer for sound insulation is arranged in the sound attenuation protective cover, the sound insulation layer can be made of sound absorption cotton, and the sound absorption cotton is artificial inorganic fiber. The glass is prepared by using natural ores such as quartz sand, limestone, dolomite and the like as main raw materials and matching with chemical raw materials such as sodium carbonate, borax and the like. In a melting state, the fibers are blown by external force and thrown into flocculent fine fibers, and the fibers are crossed and intertwined with each other to form a plurality of fine gaps. The sound absorption cotton has high sound absorption rate and good sound insulation performance; the heat insulation performance is good; the fire resistance is good, the materials B1 and B2 have flame retardant grade, are self-extinguished after being away from fire, cannot spread, and have no smoke and no toxic gas; the product is harmless to human body; 100% of environment-friendly products, and 100% of recyclable products; the waterproof and moistureproof fabric is firm, tasteless, waterproof, moistureproof, and breathable, is easy to process, can be made into various shapes according to different requirements, and has long service life; the product can not be rotten and can resist the corrosion of various microorganisms, fungi, acid, salt and hydrocarbon; no auxiliary agent or adhesive is added in the production process.
Wherein, the bottom end of the silencing protective cover is detachably connected with the base 4 so as to be convenient for overhauling the object carrier 1 or the vibration motor 7. Here, the amortization safety cover can be assembled fixedly with base 4 through the set screw, all sets up on the bottom of amortization safety cover and base 4 with set screw thread fit's screw hole 6.
In the embodiment, the plurality of elastic supporting members 5 are provided, and the elastic coefficients of the plurality of elastic supporting members 5 are the same and are uniformly distributed at the bottom end of the object carrier 1, so that the height of the object carrier 1 can be controlled, and the balance of the object carrier 1 can be ensured. Here, two elastic supporting members 5 may be provided on the base 4, and four elastic supporting members 5 may be provided.
The elastic supporting member 5 is a supporting spring, one end of the supporting spring is fixedly connected to the upper end surface of the base 4, and the other end of the supporting spring is fixedly connected to the bottom end of the luggage carrier 1. The container is vibrated up and down by the elasticity of the supporting spring in the vibration process.
The embodiment provides a device for reducing the content of dissolved oxygen in a polymer solution or gel system, wherein a container filled with the polymer solution or gel system is placed in a placing groove of a carrier 1, a vibration motor for driving the carrier 1 to vibrate is arranged at the bottom end of the carrier 1, the carrier 1 is supported by four high-coefficient springs and controls the height of the carrier, limit structures are respectively arranged in four directions of the carrier 1 to prevent the carrier 1 from swinging back and forth and left and right when working, the vibration of the vibration motor 7 triggers the up-and-down fluctuation of the springs to drive the up-and-down vibration of the carrier 1 to enable the solution in the container to rapidly roll in a vacuum-pumping state in a matching manner, and the content of oxygen in the solution is removed; a silencing protective cover is arranged outside the luggage carrier 1, and sound absorption cotton is arranged in the silencing protective cover and used for absorbing noise generated by the vibration motor 7, so that the noise of the device is reduced.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. A device for reducing the content of dissolved oxygen in a polymer solution or gel system is characterized by comprising a base (4), a carrier (1) arranged above the base (4) and a vibration motor (7) for driving the carrier (1) to vibrate, wherein a plurality of placing grooves for placing containers filled with the polymer solution or gel system are arranged on the carrier (1), the vibration motor (7) is fixedly arranged at the bottom end of the carrier (1), and an elastic supporting piece (5) for supporting the carrier (1) is arranged on the base (4); the luggage carrier also comprises a plurality of limiting structures used for limiting the front-back and left-right swinging of the luggage carrier (1).
2. The device for reducing the content of dissolved oxygen in a polymer solution or gel system according to claim 1, wherein the limiting structure comprises a limiting plate (3) fixedly connected with a base (4) and a limiting rod (2) fixed on the side wall of the carrier (1), a sliding slot (8) is arranged on the limiting plate (3), and the limiting rod (2) is located in the sliding slot (8) and can move up and down in the sliding slot (8).
3. The device for reducing the content of dissolved oxygen in a polymer solution or gel system according to claim 1, further comprising a sound-absorbing protective cover covering the carrier (1) and the limiting structure, wherein a plurality of through holes (9) for passing through a container filled with the polymer solution or gel system are formed in the top wall of the sound-absorbing protective cover, and a plurality of through holes (9) are formed in one-to-one correspondence with the plurality of placing grooves.
4. The apparatus for reducing the dissolved oxygen content of a polymer solution or gel system of claim 3, wherein a sound insulating layer is disposed within the sound dampening shroud for sound insulation.
5. Device for reducing the content of dissolved oxygen in polymer solutions or gel systems according to claim 3, characterized in that the bottom end of the sound-damping protective cover is detachably connected to the base (4).
6. The device for reducing the dissolved oxygen content of a polymer solution or gel system according to claim 1, wherein said elastic support member (5) is a support spring, one end of said support spring is fixedly connected to said base (4) and the other end is connected to the bottom end of said carrier (1).
7. The device for reducing the dissolved oxygen content of a polymer solution or gel system according to claim 2, wherein the carrier (1) has a rectangular parallelepiped structure, and at least one of the position-limiting structures is provided on each of four side walls of the carrier (1).
8. The device for reducing the dissolved oxygen content of a polymer solution or gel system according to claim 1, wherein a plurality of said elastic support members (5) are disposed on said base (4), and a plurality of said elastic support members (5) are uniformly distributed at the bottom end of said carrier (1).
9. Device for reducing the content of dissolved oxygen in polymer solutions or gel systems according to claim 8, characterized in that four of said elastic supports (5) are provided on said base (4).
10. The apparatus of claim 4, wherein the sound insulation layer is made of sound absorbing cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010348798.4A CN113559558A (en) | 2020-04-28 | 2020-04-28 | Device for reducing the dissolved oxygen content in polymer solutions or gel systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010348798.4A CN113559558A (en) | 2020-04-28 | 2020-04-28 | Device for reducing the dissolved oxygen content in polymer solutions or gel systems |
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| Publication Number | Publication Date |
|---|---|
| CN113559558A true CN113559558A (en) | 2021-10-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010348798.4A Pending CN113559558A (en) | 2020-04-28 | 2020-04-28 | Device for reducing the dissolved oxygen content in polymer solutions or gel systems |
Country Status (1)
| Country | Link |
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| CN (1) | CN113559558A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113617063A (en) * | 2020-05-07 | 2021-11-09 | 北京东航科仪仪器有限公司 | Intelligent efficient polymer solution deoxygenation system |
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| 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 |
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