Rapid dispersion and hydration device for polymer drag reducer

Abstract

A rapid dispersion and hydration device for a polymer drag reducer. The rapid dispersion and hydration device comprises a stirring drum (1), a first stirring assembly (2), a second stirring assembly (3) and a stirring shaft (4), wherein the first stirring assembly (2) has a first stirring cavity (21), and is configured to be capable of performing primary shearing on a mixed solution during rotation to obtain a pre-dispersed mixed solution; and a second stirring cavity (31) is used for receiving a secondary mixed solution, and the second stirring assembly (3) is configured to be capable of performing secondary shearing on the secondary mixed solution during rotation to obtain a dispersed mixed solution. The device can achieve the aim of rapid dispersion and hydration. By means of a processing method in which wetting, dispersion and dissolution, and hydration enhancement are performed step by step, the reaction effect during proportioning and blending is improved, the uniform mixing and rapid hydration process of a polymer drag reducer is achieved, the proportioning and blending effect is ensured while the proportioning and blending efficiency is improved, and the performance damage to a mixed solution is greatly reduced; in addition, the reaction process is accelerated, and the polymer performance is rapidly exerted.

Description

Rapid dispersion hydration device for polymer drag reducers

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of Chinese patent application 202311798003.X filed on December 25, 2023, the contents of which are incorporated herein by reference. Technical Field

[0003] With the development and advancement of fracturing technology, the demand for fracturing fluid usage and performance is also increasing. Drag reducers, as the main additives in fracturing fluid mixing, are key components for increasing viscosity and reducing drag in fracturing fluids. They need to be pre-prepared at a specific concentration and then mixed with other additives and materials to form fracturing fluids.

[0004] With the development of polymer materials, polymer drag reducer products mainly based on acrylamide compounds have emerged. These products can form stable drag reducing additives by dissolving in water solvents and undergoing hydration. In addition, the production technology of these materials is low in difficulty, and they can be synthesized in large quantities on an industrial scale, with stable supply and low price.

[0005] Polymer powders are very easily soluble in aqueous solvents. As the mixing concentration increases, it is difficult to achieve uniform mixing of polymers using general mixing techniques, and the full hydration time is relatively long. Existing polymer drag reducers are still prepared by stirring and adding additives, which has limited output, high additive costs, and low effective ingredients in drag reducers. Existing homogenous dispersion equipment can achieve solid-liquid dispersion, but its principle structure and technical methods are not suitable for polymer drag reducers, which will cause performance damage to the polymer mixture and cannot achieve rapid hydration of the polymer. Such devices cannot be used in polymer drag reducer mixing. High-molecular polymer drag reducers have great application value in fracturing fluids. Therefore, there is an urgent need for a dispersion device that can achieve rapid hydration of polymer drag reducers to meet the configuration and use of fracturing fluids. Background Art

[0006] With the development and advancement of fracturing technology, the demand for fracturing fluid usage and performance is also increasing. Drag reducers, as the main additives in fracturing fluid mixing, are key components for increasing viscosity and reducing drag in fracturing fluids. They need to be pre-prepared at a specific concentration and then mixed with other additives and materials to form fracturing fluids.

[0007] With the development of polymer materials, polymer drag reducer products mainly based on acrylamide compounds have emerged. These products can form stable drag reducing additives by dissolving in water solvents and undergoing hydration. In addition, the production technology of these materials is low in difficulty, and they can be synthesized in large quantities on an industrial scale, with stable supply and low price.

[0008] Polymer powders are very easily soluble in aqueous solvents. As the mixing concentration increases, it is difficult to achieve uniform mixing of polymers using general mixing techniques, and the full hydration time is relatively long. Existing polymer drag reducers are still prepared by stirring and adding additives, which has limited output, high additive costs, and low effective ingredients in drag reducers. Existing homogenous dispersion equipment can achieve solid-liquid dispersion, but its principle structure and technical methods are not suitable for polymer drag reducers, which will cause performance damage to the polymer mixture and cannot achieve rapid hydration of the polymer. Such devices cannot be used in polymer drag reducer mixing. High-molecular polymer drag reducers have great application value in fracturing fluids. Therefore, there is an urgent need for a dispersion device that can achieve rapid hydration of polymer drag reducers to meet the configuration and use of fracturing fluids.

[0009] Summary of the Invention

[0010] In order to solve the above technical problems or at least partially solve the above technical problems, the present invention provides a rapid dispersion and hydration device for a polymer drag reducer.

[0011] The present invention provides a rapid dispersion and hydration device for a polymer drag reducer, comprising a stirring drum, a first stirring component and a second stirring component arranged inside the stirring drum, and a stirring shaft for driving the first stirring component and the second stirring component to rotate, wherein the first stirring component has a first stirring chamber for receiving and accommodating polymer powder and solvent to form a dissolved mixed liquid in the first stirring chamber, the first stirring component is configured to be able to shear the mixed liquid once during rotation to obtain a pre-dispersed mixed liquid, the pre-dispersed mixed liquid is dissolved and hydrated for a second time with the introduced solvent in the stirring drum to obtain a secondary mixed liquid, the second stirring chamber is used to receive the secondary mixed liquid, and the second stirring component is configured to be able to shear the secondary mixed liquid twice during rotation to obtain a dispersed mixed liquid.

[0012] Optionally, the first stirring assembly includes a first dispersing stator arranged on the inner wall of the stirring drum and a first dispersing rotor arranged on the outer periphery of the stirring shaft, a first dispersing blade tooth group is provided on the peripheral wall of the first dispersing stator, and a second dispersing blade tooth group is provided on the peripheral wall of the first dispersing rotor, the first dispersing blade tooth group and the second dispersing blade tooth group are engaged with each other to form the first stirring chamber, and a first feed inlet for the polymer powder and the solvent to enter is formed on the top of the first dispersing stator.

[0013] Optionally, the first dispersed stator comprises:

[0014] a first dispersing blade disc connected to the inner wall of the mixing drum, wherein the first dispersing blade tooth group includes a plurality of first dispersing blade teeth arranged at the bottom of the first dispersing blade disc, and the plurality of first dispersing blade teeth are arranged at intervals along the circumferential direction of the first dispersing blade disc;

[0015] The liquid inlet funnel is arranged on the top of the first dispersing blade disc, and the top of the liquid inlet funnel is expanded outward, and the top of the liquid inlet funnel forms the first feed port.

[0016] Optionally, the first dispersing rotor includes a second dispersing blade disc arranged on the periphery of the stirring shaft, and the second dispersing blade tooth group includes a plurality of second dispersing blade teeth arranged on the top of the second dispersing blade disc, and the plurality of second dispersing blade teeth are arranged at intervals along the circumferential direction of the second dispersing blade disc.

[0017] Optionally, a sealing short section is provided inside the mixing drum, a water flow channel is formed between the sealing short section and the inner wall of the mixing drum, an infusion port connected to the water flow channel is provided on the side wall of the mixing drum, the first dispersing blade disc is connected to the inner wall of the sealing short section, so that the first dispersing blade disc, the sealing short section and the top of the mixing drum form a first liquid inlet cavity, the liquid inlet funnel is in the first liquid inlet cavity, and a first liquid inlet for connecting the first liquid inlet cavity and the water flow channel is provided on the side wall of the sealing short section.

[0018] Optionally, the second stirring assembly is arranged below the first stirring assembly, and the second stirring assembly includes a second dispersing stator arranged on the inner wall of the sealing short section and a second dispersing rotor arranged on the outer periphery of the stirring shaft, a third dispersing blade tooth group is provided on the peripheral wall of the second dispersing stator, and a fourth dispersing blade tooth group is provided on the peripheral wall of the second dispersing rotor, the third dispersing blade tooth group and the fourth dispersing blade tooth group are engaged with each other to form the second stirring chamber, and a second feed inlet for the secondary mixed liquid to enter is formed on the top of the second dispersing stator.

[0019] Optionally, the second dispersing stator includes a third dispersing blade disc connected to the bottom of the isolation short section, the second feed port is formed between the third dispersing blade disc and the stirring shaft, and the third dispersing blade tooth group includes a plurality of third dispersing blade teeth arranged at the bottom of the third dispersing blade disc, and the plurality of third dispersing blade teeth are arranged at intervals along the circumferential direction of the third dispersing blade disc.

[0020] Optionally, the second dispersing rotor includes a fourth dispersing blade disc arranged on the periphery of the stirring shaft, and the fourth dispersing blade tooth group includes a plurality of fourth dispersing blade teeth arranged on the top of the fourth dispersing blade disc, and the plurality of fourth dispersing blade teeth are arranged at intervals along the circumferential direction of the fourth dispersing blade disc.

[0021] Optionally, a second liquid inlet cavity is formed between the first dispersing cutter disc, the third dispersing cutter disc and the isolation nipple, and a second liquid inlet for connecting the second liquid inlet cavity and the water flow channel is provided on the side wall of the isolation nipple.

[0022] Optionally, a guide rotor for conveying the secondary mixed liquid in the second liquid inlet cavity toward the second feed port is provided on the outer periphery of the portion of the stirring shaft in the second liquid inlet cavity.

[0023] Optionally, the distance between two adjacent first dispersing blade teeth is 5-20 mm, and the tooth gaps of the first dispersing blade teeth are symmetrical and the symmetry line intersects at the center of the first dispersing blade disc.

[0024] Optionally, the spacing between two adjacent second dispersing blade teeth is 5-20 mm, and the deflection angle of the two side edges of the second dispersing blade teeth along the circumferential direction of the second dispersing blade disc relative to the extension line in the radial direction of the second dispersing blade disc is 10-30°.

[0025] Optionally, the spacing between two adjacent third dispersing blade teeth is 3-10 mm, and the deflection angle of the two side edges of the third dispersing blade teeth along the circumferential direction of the third dispersing blade disc relative to the extension line in the radial direction of the third dispersing blade disc is 10-30°.

[0026] Optionally, the spacing between two adjacent fourth dispersing teeth is 3-10 mm, and the deflection angle of the two side edges of the fourth dispersing teeth along the circumferential direction of the fourth dispersing cutter disc relative to the extension line in the radial direction of the fourth dispersing cutter disc is 10-30°.

[0027] Optionally, the tooth pitch of the third dispersing blade teeth and the fourth dispersing blade teeth is smaller than the tooth pitch of the first dispersing blade teeth and the second dispersing blade teeth.

[0028] Optionally, the first assembly gap between the first dispersing blade tooth group and the second dispersing blade tooth group is 0.1-1 mm, and / or

[0029] The second assembly gap between the third dispersing blade tooth group and the fourth dispersing blade tooth group is 0.1-1 mm.

[0030] Optionally, an output cavity for receiving the dispersed mixed liquid is provided below the second stirring component, and the output cavity has an output port for delivering the dispersed mixed liquid.

[0031] Optionally, an output rotor for conveying the dispersed mixed liquid toward the output port is provided on the outer periphery of the portion of the stirring shaft located in the output cavity.

[0032] Optionally, a feeding channel for conveying the polymer powder toward the first stirring chamber is provided on the top of the stirring drum.

[0033] Optionally, a delivery branch pipe for delivering inert gas or auxiliary reagent is connected to the side wall of the feed channel.

[0034] The technical solution provided by the embodiments of the present invention has the following advantages compared with the prior art:

[0035] By incorporating the characteristics of polymer drag reducers as they change from dissolution to hydration in a solvent, this invention proposes a step-by-step process whereby the polymer drag reducer and water sequentially pass through a liquid inlet funnel, a first stirring assembly, and a second stirring assembly. This process achieves uniform wetting, accelerated dissolution, and enhanced hydration of the drag reducer in three stages. Uniform wetting and accelerated dispersion ensure rapid dispersion of the polymer drag reducer powder particles in water, allowing them to spread out at the microscopic level and ensuring sufficient contact between each particle with water. These two processes eliminate uneven mixing phenomena such as fisheyes and floccules at the macroscopic level. The enhanced hydration process imparts energy to the particles, enabling the molecular chains to fully hydrate with water molecules, accelerating the stretching of the polymer chains and dramatically increasing the viscosity of the mixed liquid at the macroscopic level, thereby reducing pipeline friction and effectively carrying solid sand and gravel. This solution implements the dissolution and hydration processes in separate stages, aligning with the changing characteristics of the polymer drag reducer. This improves the reliability of the device in handling powders and effectively mitigates the limitations of processing capacity and effectiveness associated with a single dispersible cavity structure that simultaneously performs the dissolution and hydration processes. When the feed powder volume fluctuates dramatically, the monodisperse structure is more susceptible to blockage and uneven mixing due to the single dispersion flow field between water and fluid. This solution effectively overcomes these problems, improving mixing efficiency while ensuring mixing results, greatly reducing damage to the mixed liquid performance, and accelerating the reaction process, quickly unleashing polymer properties, making it more suitable for actual production applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0038] FIG1 is a schematic structural diagram of a cross-section of the rapid dispersion hydration device according to an embodiment of the present invention;

[0039] FIG2 is a cross-sectional view of a rapid dispersion hydration device according to an embodiment of the present invention;

[0040] FIG3 is a schematic structural diagram of the first dispersed stator according to an embodiment of the present invention;

[0041] FIG4 is a bottom view of the first dispersed stator according to an embodiment of the present invention;

[0042] FIG5 is a schematic structural diagram of the first dispersing rotor according to an embodiment of the present invention;

[0043] FIG6 is a top view of the first dispersing rotor according to an embodiment of the present invention;

[0044] FIG7 is a schematic structural diagram of the second dispersed stator according to an embodiment of the present invention;

[0045] FIG8 is a bottom view of the second dispersed stator according to an embodiment of the present invention;

[0046] FIG9 is a schematic structural diagram of the second dispersing rotor according to an embodiment of the present invention;

[0047] FIG10 is a top view of the second dispersing rotor according to an embodiment of the present invention.

[0048] Description of Reference Numerals

[0049] 1. Mixing drum; 101. Base; 102. Mechanical seal fixing plate; 103. Infusion sub; 104. Top cover; 105. Compression tube; 106. Gland; 11. Seal sub; 111. First liquid inlet; 112. Second liquid inlet; 12. Water flow channel; 13. Infusion port; 14. First liquid inlet cavity; 15. Second liquid inlet cavity; 16. Output cavity; 17. Feed channel; 171. Delivery branch pipe; 2. First stirring assembly; 21. First stirring cavity; 22. First dispersion stator; 221. First dispersion blade group; 2211. First dispersion blade; 222. First dispersion blade disc; 223. Liquid inlet funnel; 2231, first feed port; 23, first dispersing rotor; 231, second dispersing blade tooth group; 2311, second dispersing blade tooth; 232, second dispersing cutter disc; 3, second stirring assembly; 31, second stirring chamber; 32, second dispersing stator; 321, third dispersing blade tooth group; 3211, third dispersing blade tooth; 322, second feed port; 323, third dispersing cutter disc; 33, second dispersing rotor; 331, fourth dispersing blade tooth group; 3311, fourth dispersing blade tooth; 332, fourth dispersing cutter disc; 4, stirring shaft; 41, guide rotor; 42, output rotor; 5, power source. DETAILED DESCRIPTION

[0050] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0051] The following description sets forth many specific details to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the implementation methods in the specification are only part of the implementation methods of the present invention, not all of the implementation methods.

[0052] As shown in Figures 1 and 2 , the rapid dispersion and hydration device for a polymer drag reducer provided in an embodiment of the present invention includes a mixing drum 1, a first stirring assembly 2 and a second stirring assembly 3 disposed within the mixing drum 1, and a stirring shaft 4 for driving the first stirring assembly 2 and the second stirring assembly 3 to rotate. It is understood that a power source 5 should also be provided within the mixing drum 1 to drive the stirring shaft 4 to rotate. The rotating shaft extends vertically, and the axis of the rotating shaft coincides with the axis of the mixing drum 1. The power source 5 includes, but is not limited to, a power source such as a direct connection to a motor and a power source such as a motor pulley.

[0053] The first stirring assembly 2 has a first stirring chamber 21 for receiving and containing the polymer powder and solvent to form a dissolved mixed liquid within the first stirring chamber 21. The first stirring assembly 2 is configured to perform a primary shearing of the mixed liquid during rotation to obtain a pre-dispersed mixed liquid. The pre-dispersed mixed liquid undergoes a secondary dissolution and hydration with the introduced solvent within the mixing drum 1 to obtain a secondary mixed liquid. The second stirring chamber 31 is configured to receive the secondary mixed liquid, and the second stirring assembly 3 is configured to perform a secondary shearing of the secondary mixed liquid during rotation to obtain a dispersed mixed liquid. The solvent may be an aqueous solvent, for example.

[0054] In this design, the power source 5 drives the stirring shaft 4 to rotate, thereby driving the first stirring assembly 2 and the second stirring assembly 3 to rotate coaxially through the stirring shaft 4. The polymer drag reducer and solvent enter the first stirring chamber 21 of the first stirring assembly 2 for pre-wetting. The pre-wetting of the first stirring chamber 21 is performed at the top of the first stirring chamber 21 or in the liquid inlet funnel 223 above the first stirring chamber 21. The design of the liquid inlet funnel 223 is described below. To begin the dissolution process, the first stirring assembly 2 rotates to form a pre-mixed liquid with the polymer fracturing fluid and the solvent through centrifugal action. After the pre-mixed liquid and the solvent are mixed, the pre-mixed liquid enters the second stirring chamber 31 of the second stirring assembly 3 for secondary dispersion to form a final mixed liquid, which is then discharged.

[0055] The present invention combines the hydration characteristics of polymer drag reducers and divides the mixing process of polymer drag reducers and solvents into three processes: pre-wetting, dispersion and dissolution, and hydration enhancement. That is, the polymer drag reducer is first uniformly wetted at the liquid inlet funnel 223; the mixed liquid contacts the water flow entering through the second liquid inlet 112 in the first stirring chamber 21 to accelerate dispersion and dissolution; and then the mixed liquid enters the second stirring chamber 31 for hydration enhancement. The three stages are carried out in sequence, separating the dissolution and hydration process of the polymer drag reducer, enhancing the effect in stages, and avoiding the defects of insufficient processing capacity and blockage caused by the superposition of the dispersion and hydration flow fields in a single cavity while simultaneously implementing the dissolution and hydration processes. In addition, combined with the dispersion effect of the mechanical structure, the dispersion and hydration effect of the polymer drag reducer is effectively improved, and the dispersion and hydration process of the polymer drag reducer is greatly accelerated, achieving the purpose of rapid dispersion and hydration.

[0056] The present invention adopts the processing method of the first stirring component 2 and the second stirring component 3 in combination with the property change characteristics of the polymer drag reducer from dissolution to hydration in the solvent, so as to achieve the purpose of rapid dispersion and hydration, which complies with the change law of the polymer drag reducer, and improves the reaction effect during the change process through the shear processing method, thereby achieving uniform mixing and rapid hydration of the polymer drag reducer, improving the mixing efficiency while ensuring the mixing effect, greatly reducing the damage to the performance of the mixed liquid, and accelerating the reaction process. At the same time, the polymer performance is quickly exerted, making it more suitable for actual production applications.

[0057] In some embodiments, as shown in Figures 1 and 2, the first stirring assembly 2 includes a first dispersing stator 22 arranged on the inner wall of the stirring drum 1 and a first dispersing rotor 23 arranged on the outer periphery of the stirring shaft 4. A first dispersing blade tooth group 221 is provided on the peripheral wall of the first dispersing stator 22, and a second dispersing blade tooth group 231 is provided on the peripheral wall of the first dispersing rotor 23. The first dispersing blade tooth group 221 is engaged with the second dispersing blade tooth group 231 to form a first stirring chamber 21, and a first feed inlet 2231 is formed on the top of the first dispersing stator 22 for polymer powder and solvent to enter.

[0058] In this design, polymer powder and solvent enter the first stirring chamber 21 formed by the first dispersing blade group 221 and the second dispersing blade group 231 through the first feed port 2231. As the stirring shaft 4 drives the first dispersing rotor 23 to rotate, the polymer powder dissolves in the first stirring chamber 21 to produce a premixed liquid. The second dispersing blade group 231 is located inside the first dispersing blade group 221. The premixed liquid flows from the tooth gaps of the second dispersing blade group 231 to the tooth gaps of the first dispersing blade group 221, and then flows out of the tooth gaps of the first dispersing blade group 221 to produce and transport the primary product.

[0059] In some embodiments, as the first stirring component 2 stirs, a low-water-level vortex can be generated in the liquid inlet funnel 223 . The formation of the low-water-level vortex causes the airflow in the liquid inlet funnel 223 to be in a downward vortex shape.

[0060] Under this design, the airflow in the liquid inlet funnel 223 is in a downward vortex shape to generate negative pressure, so that the falling of the polymer powder is constrained, and it can fall in a concentrated manner without scattering randomly, which helps the polymer powder enter the first stirring chamber 21 and avoids the accumulation of polymer powder. At the same time, the vortex can make the wetting of the polymer powder entering the first stirring chamber 21 more uniform.

[0061] In some embodiments, as shown in conjunction with Figures 3 and 4 , the first dispersing stator 22 includes a first dispersing blade disc 222 and a liquid inlet funnel 223. The first dispersing blade disc 222 is connected to the inner wall of the mixing drum 1. The first dispersing blade tooth group 221 includes a plurality of first dispersing blade teeth 2211 disposed at the bottom of the first dispersing blade disc 222. The plurality of first dispersing blade teeth 2211 are spaced apart along the circumference of the first dispersing blade disc 222. The liquid inlet funnel 223 is disposed on top of the first dispersing blade disc 222, and the top of the liquid inlet funnel 223 expands outward to form a bowl-shaped structure. The top of the liquid inlet funnel 223 forms a first feed port 2231. A gap is formed between two adjacent first dispersing blade teeth 2211 to allow for uniform fluid flow. The first dispersing stator 22 is located below the top cover 104 of the mixing drum 1 and is used to receive the polymer powder delivered through its top. After the polymer powder enters the liquid inlet funnel 223, it slides downward under the action of the slope, facilitating the aggregation of the materials. In addition, the introduced polymer powder and solvent can be premixed in the liquid inlet funnel 223, so that premixing and dissolution (dissolution in the first stirring chamber 21) are carried out separately. The first dispersing blade teeth 2211 are detachable and evenly arranged centripetally at the bottom of the first dispersing blade disc 222.

[0062] Under this design, the present invention utilizes the three processes of pre-mixing and wetting in the liquid inlet funnel 223, accelerating dispersion and dissolution in the first liquid inlet chamber 14, and strengthening the hydration process in the second stirring chamber 31, thereby achieving rapid and uniform dispersion of the polymer powder into the solvent, accelerating the dissolution process, and utilizing the flow field formed by the structure to accelerate the stretching of the polymer powder molecules in the solvent, strengthening the hydration process, and achieving rapid mixing of the polymer drag reducer.

[0063] As shown in Figures 5 and 6 , the first dispersing rotor 23 includes a second dispersing blade disc 232 disposed on the outer periphery of the agitator shaft 4. The second dispersing blade set 231 includes a plurality of second dispersing blade teeth 2311 disposed on the top of the second dispersing blade disc 232. The plurality of second dispersing blade teeth 2311 are spaced apart along the circumference of the second dispersing blade disc 232. This design creates gaps between adjacent second dispersing blade teeth 2311, allowing for uniform fluid flow. Furthermore, the agitator shaft 4 rotates the second dispersing blade disc 232, which in turn rotates the plurality of second dispersing blade teeth 2311. As the fluid passes through these gaps, it is sheared by the second dispersing blade teeth 2311. The second dispersing blade disc 232 is radially constrained to the agitator shaft 4 via a keyway. This constraint is conventional in the art and is not described in detail here. The second dispersing blade teeth 2311 are detachable and evenly arranged centripetally on the top of the second dispersing blade disc 232.

[0064] In this design, the polymer drag reducer and solvent enter the liquid inlet funnel 223 for pre-wetting before entering the first stirring chamber 21 to begin the dissolution process. The first stirring assembly 2 rotates, centrifugally causing the polymer fracturing fluid and solvent to form a premixed liquid. The premixed liquid flows from the gaps between the second dispersing blades 2311 to the gaps between the first dispersing blades 2211, and then flows out from the gaps between the first dispersing blades 2211. During this process, the premixed liquid undergoes high-speed shearing by the first dispersing blades 2211 and the second dispersing blades 2311. Furthermore, due to the first assembly gap formed between the first dispersing blades 2211 and the second dispersing blades 2311, the premixed liquid is ground within this gap, breaking down any agglomerates or fisheyes in the polymer drag reducer, ensuring uniform dispersion and sufficient contact with the solvent. This accelerates the dissolution process, ultimately forming a pre-dispersed mixed liquid that flows into the subsequent isolation sub 11 and is then carried into the second stirring assembly 3 by the rotating guide rotor 41.

[0065] In addition, under the powerful power provided by the single stirring shaft 4, the first dispersing rotor 23 forms an enhanced dispersion flow field with high energy (or high dispersion, low shear) between the first dispersing stator 22 through a special toothed disc structure design, so that the polymer drag reducer can be evenly dispersed in the solvent in an extremely short time, fully contact with the solvent, enhance the dispersion process, and increase the dissolution rate.

[0066] As shown in Figures 1 and 2 , a sealing subsection 11 is provided inside the mixing drum 1. A water flow channel 12 is formed between the sealing subsection 11 and the inner wall of the mixing drum 1. A liquid inlet 13 connected to the water flow channel 12 is provided on the side wall of the mixing drum 1. A first dispersing blade disc 222 is connected to the inner wall of the sealing subsection 11. Specifically, the first dispersing blade disc 222 is nested with the top of the sealing subsection 11 so that the sealing subsection 11 is located below the first dispersing blade disc 222 and the top of the sealing subsection 11 is sealed by the first dispersing blade disc 222. The first dispersing blade disc 222, the sealing subsection 11, and the top of the mixing drum 1 form a first liquid inlet chamber 14. The liquid inlet funnel 223 is located in the first liquid inlet chamber 14. A first liquid inlet port 111 for connecting the first liquid inlet chamber 14 and the water flow channel 12 is provided on the side wall of the sealing subsection 11.

[0067] During operation, the solvent enters the water flow channel 12 from the infusion port 13. A small amount of solvent in the water flow channel 12 enters the first liquid inlet chamber 14 through the first liquid inlet port 111, gradually accumulating in the first liquid inlet chamber 14 until the solvent flows from the liquid inlet funnel 223 into the first stirring chamber 21, where it comes into contact with the polymer powder in the first stirring chamber 21, causing the polymer powder to dissolve. In this design, the infusion port 13 delivers the solvent to the water flow channel 12, and the solvent in the water flow channel 12 can be delivered to the first liquid inlet chamber 14 through the first liquid inlet port 111, thereby achieving solvent delivery through the side of the mixing drum 1, facilitating the separation of solvent delivery and polymer powder delivery to avoid mutual interference.

[0068] In some embodiments, the second stirring assembly 3 is arranged below the first stirring assembly 2, and the second stirring assembly 3 includes a second dispersing stator 32 arranged on the inner wall of the sealing short section 11 and a second dispersing rotor 33 arranged on the outer periphery of the stirring shaft 4. A third dispersing tooth group 321 is provided on the peripheral wall of the second dispersing stator 32, and a fourth dispersing tooth group 331 is provided on the peripheral wall of the second dispersing rotor 33. The third dispersing tooth group 321 and the fourth dispersing tooth group 331 are engaged with each other to form a second stirring chamber 31, and a second feed inlet 322 for the secondary mixed liquid to enter is formed at the top of the second dispersing stator 32.

[0069] Under this design, the second feed port 322 is used to introduce the secondary mixed liquid. After the secondary mixed liquid passes through the second feed port 322 and then enters the second stirring chamber 31, as the stirring shaft 4 drives the second dispersing rotor 33 to rotate, the secondary mixed liquid flows from the tooth gap of the fourth dispersing tooth group 331 to the tooth gap of the third dispersing tooth group 321, and then flows out from the tooth gap of the third dispersing tooth group 321 to obtain and transport the target product.

[0070] As a feasible embodiment, as shown in conjunction with Figures 7 and 8 , the second dispersion stator 32 includes a third dispersion blade disc 323 connected to the bottom of the isolation subsection 11, so that the third dispersion blade disc 323 can block the bottom end of the isolation subsection 11. A second feed inlet 322 is formed between the third dispersion blade disc 323 and the agitator shaft 4. Specifically, a through hole is concentrically provided in the middle of the third dispersion blade disc 323, and the diameter of the through hole is larger than the diameter of the agitator shaft 4, so that an annular second feed inlet 322 can be formed between the third dispersion blade disc 323 and the agitator shaft 4. The third dispersion blade tooth group 321 includes a plurality of third dispersion blade teeth 3211 disposed at the bottom of the third dispersion blade disc 323. The plurality of third dispersion blade teeth 3211 are spaced apart along the circumferential direction of the third dispersion blade disc 323, with gaps formed between adjacent third dispersion blade teeth 3211 to allow for uniform fluid flow. The third dispersion blade teeth 3211 are detachable and evenly arranged concentrically at the bottom of the third dispersion blade disc 323.

[0071] As shown in Figures 9 and 10 , the second dispersing rotor 33 includes a fourth dispersing blade disc 332 disposed on the outer circumference of the agitator shaft 4. The fourth dispersing blade set 331 includes a plurality of fourth dispersing blade teeth 3311 disposed on the top of the fourth dispersing blade disc 332. The plurality of fourth dispersing blade teeth 3311 are spaced apart along the circumference of the fourth dispersing blade disc 332. With this design, gaps are formed between adjacent fourth dispersing blade teeth 3311, allowing for uniform fluid flow. Simultaneously, the agitator shaft 4 drives the fourth dispersing blade disc 332 to rotate, which in turn drives the plurality of fourth dispersing blade teeth 3311 to rotate. As the fluid passes through these gaps, it is sheared by the fourth dispersing blade teeth 3311. The fourth dispersing blade disc 332 is radially constrained by a keyway on the agitator shaft 4. Furthermore, the fourth dispersing blade disc 332 can be axially constrained by a compression tube 105. This constraint is conventional in the art and is not described in detail here. The fourth dispersing blade teeth 3311 are detachable and evenly arranged centripetally on the top of the fourth dispersing blade disc 332 .

[0072] Under this design, the second dispersing rotor 33, under the power provided by the stirring shaft 4, forms an enhanced hydration flow field with high shear and high entropy values ​​with the second dispersing stator 32 through a special toothed disc design. The powerful flow field and toothed disc shear force are used to accelerate the stretching of the polymer molecular chain and enhance the powder hydration process.

[0073] A second liquid inlet chamber 15 is formed between the first dispersing blade disc 222, the third dispersing blade disc 323 and the isolation short section 11. The pre-dispersed mixed liquid output by the first stirring assembly 2 enters the second liquid inlet chamber 15. A second liquid inlet port 112 is provided on the side wall of the isolation short section 11 for connecting the second liquid inlet chamber 15 and the water flow channel 12. Specifically, the second liquid inlet port 112 includes a plurality of elongated holes provided on the side wall of the isolation short section 11. The plurality of elongated holes are spaced apart along the circumferential direction of the isolation short section 11 so that the plurality of elongated holes are evenly distributed on the periphery of the isolation short section 11. The size and number of the elongated holes are determined by the specific solvent required for dispersion, and preferably there are four elongated holes. Under this design, another large amount of solvent in the water flow channel 12 enters the second liquid inlet chamber 15 through the second liquid inlet port 112 and contacts the pre-dispersed mixed liquid in the second liquid inlet chamber 15. The pre-dispersed mixed liquid is secondary dissolved and hydrated to obtain a secondary mixed liquid. This design method realizes the delivery of liquid in the first liquid inlet cavity 14 and the second liquid inlet cavity 15 through one infusion port 13, making the overall structure more compact.

[0074] The outer periphery of the portion of the stirring shaft 4 located in the second liquid inlet chamber 15 is provided with a guide rotor 41 for conveying the secondary mixed liquid in the second liquid inlet chamber 15 toward the second feed port 322. By providing the guide rotor 41, the secondary mixed liquid in the second stirring chamber 31 is moved toward the axial direction of the stirring shaft 4 and conveyed downward, ensuring that the secondary mixed liquid can enter the second stirring chamber 31 through the second feed port 322. Among them, a spiral structure can be provided on the outer periphery of the guide rotor 41 to realize the conveying function of the secondary mixed liquid. The guide rotor 41 is radially constrained by the keyway of the stirring shaft 4 to avoid relative rotation between the guide rotor 41 and the stirring shaft 4, thereby ensuring the diversion effect of the guide rotor 41.

[0075] Specifically, the bottom end of the second dispersing blade disc 232 is pressed against the top end of the guide rotor 41, a step is provided on the agitator shaft 4, a compression tube 105 is provided above the step position of the agitator shaft 4, the top of the compression tube 105 is supported on the bottom of the guide rotor 41, and a pressure cap 106 is provided at the top end of the agitator shaft 4. The pressure cap 106 presses the second dispersing blade disc 232 in the direction of the step of the agitator shaft 4 to form an axial constraint on the second dispersing blade disc 232, thereby preventing the second dispersing blade disc 232, the guide rotor 41 and the compression tube 105 from moving along the axial direction of the agitator shaft 4, wherein the pressure cap 106 can be screwed onto the top end of the agitator shaft 4 to ensure the compression effect of the pressure cap 106. Under this design, torque can be transmitted to the agitator shaft 4 through the power source 5, and the agitator shaft 4 drives the second dispersing blade disc 232, the fourth dispersing blade disc 332, the guide rotor 41, the output rotor 42 described below and the compression tube 105 to rotate coaxially at high speed.

[0076] During use, the pre-dispersed mixed liquid and solvent entering the second liquid inlet chamber 15 are carried by the guide rotor 41 into the second stirring chamber 31. Under the centrifugal force of the second dispersing rotor 33, the pre-dispersed mixed liquid and the newly introduced solvent flow through the gaps between the fourth dispersing blade teeth 3311 toward the third dispersing blade teeth 3211, and then out through the gaps between the third dispersing blade teeth 3211. During this flow, the pre-dispersed mixed liquid and the newly introduced solvent undergo secondary dissolution and hydration. They are subjected to high-speed shearing by the fourth dispersing blade teeth 3311 and the third dispersing blade teeth 3211. The first dispersing blade teeth 2211 and the second dispersing blade teeth 2311 are spaced apart to form a second assembly gap between the first dispersing blade teeth 2211 and the second dispersing blade teeth 2311. Within this second assembly gap, the pre-dispersed mixed liquid and the solvent are ground, destroying the micelles and floccules in the pre-dispersed mixed liquid and allowing for full contact with the newly introduced solvent. This results in a more uniform dispersion of the polymer drag reducer, more favorable hydration reaction conditions, and accelerated hydration, ultimately forming a final mixed liquid.

[0077] Among them, the spacing between the teeth will affect the outflow of the polymer drag reducer. The larger the spacing, the higher the outflow and the weaker the shear effect. The smaller the spacing, the smaller the outflow and the greater the shear effect.

[0078] As shown in Figure 4, the spacing between two adjacent first dispersing blade teeth 2211 is 5-20 mm, and the tooth gaps of the first dispersing blade teeth 2211 are symmetrical, with the symmetry line intersecting at the center of the first dispersing blade disc 222. Specifically, the distance between two adjacent first dispersing blade teeth 2211 is a1, and the range of a1 is 5-20 mm.

[0079] As shown in Figure 6, the spacing between two adjacent second dispersing blade teeth 2311 is 5-20 mm. The two side edges of the second dispersing blade teeth 2311 along the circumferential direction of the second dispersing blade disc 232 are deflected at angles of 10-30° relative to the radial extension of the second dispersing blade disc 232, and the leading angle along the rotational direction is smaller than the trailing angle. Specifically, the distance between the corresponding oblique edges of two adjacent second dispersing blade teeth 2311 is a2, the leading angle of the second dispersing blade teeth 2311 is b1, and the trailing angle is b2. The range of a2 is 5-20 mm, and the ranges of b1 and b2 are 10-30°, with b1 less than b2.

[0080] As shown in FIG8 , the spacing between two adjacent third dispersing blade teeth 3211 is 3-10 mm, and the two side edges of the third dispersing blade teeth 3211 along the circumferential direction of the third dispersing blade disc 323 are deflected at angles of 10-30° relative to the radial extension of the third dispersing blade disc 323. Specifically, the distance between the corresponding oblique edges of two adjacent third dispersing blade teeth 3211 is a3, and the tooth spacing angle is b3. The range of a3 is 3-10 mm, and the range of b3 is 10-30°.

[0081] As shown in Figure 10 , the spacing between two adjacent fourth dispersing blade teeth 3311 is 3-10 mm, and the two side edges of the fourth dispersing blade teeth 3311 along the circumferential direction of the fourth dispersing blade disc 332 are deflected at angles of 10-30° relative to the radial extension of the fourth dispersing blade disc 332. Specifically, the distance between the corresponding oblique edges of two adjacent fourth dispersing blade teeth 3311 is a4, and the tooth spacing angle is b4. The range of a4 is 3-10 mm, and the range of b4 is 10-30°, with b4 > b3.

[0082] In some embodiments, the pitch of the third dispersing blade teeth 3211 and the fourth dispersing blade teeth 3311 is smaller than the pitch of the first dispersing blade teeth 2211 and the second dispersing blade teeth 2311. In this design, the secondary shear strength is greater than the primary shear strength, ensuring that the mixed liquid can be evenly dispersed.

[0083] In some embodiments, the first assembly gap between the first dispersing blade group 221 and the second dispersing blade group 231 is 0.1-1 mm. In this design, the first dispersing blade group 221 and the second dispersing blade group 231 are spaced apart. After the polymer powder and solvent enter the first stirring chamber 21, a mixed liquid is formed. The mixed liquid flows through the gap of the second dispersing blade group 231 into the first assembly gap, and then flows to the first dispersing blade group 221. The mixed liquid is sheared and ground by the high-speed rotation of the second dispersing blade group 231 and the first dispersing blade group 221. The first assembly gap is determined by the specific number of molecules and particle size of the polymer drag reducer used. When the particle size of the polymer drag reducer is approximately 70-100 mesh, the first assembly gap is 0.3-0.5 mm.

[0084] In some embodiments, the second assembly gap between the third dispersing tooth group 321 and the fourth dispersing tooth group 331 is 0.1-1 mm. With this design, the third dispersing tooth group 321 and the fourth dispersing tooth group 331 are spaced apart. After the mixed liquid and the solvent are mixed, a secondary mixed liquid is generated and enters the second stirring chamber 31. The secondary mixed liquid flows through the gap of the fourth dispersing tooth group 331 into the second assembly gap between the third and fourth dispersing tooth groups 321, and then flows to the third dispersing tooth group 321. The high-speed rotation of the fourth and third dispersing tooth groups 331 causes secondary shearing and grinding of the secondary mixed liquid. The second assembly gap is determined by the specific number of polymer drag reducer molecules and particle size. When the particle size of the polymer drag reducer is approximately 70-100 mesh, the second assembly gap is 0.2-0.4 mm. The second assembly gap should be larger than the first assembly gap.

[0085] An output cavity 16 for receiving the dispersed mixed liquid is provided below the second stirring assembly 3. The output cavity 16 has an output port for delivering the dispersed mixed liquid. After the dispersed mixed liquid enters the output cavity 16, it is delivered to the target location through the delivery port for easy collection of the dispersed mixed liquid.

[0086] For further optimization, the outer periphery of the stirring shaft 4 in the output cavity 16 is provided with an output rotor 42 for conveying the dispersed mixed liquid toward the output port. Since the viscosity of the dispersed mixed liquid is relatively high, the output rotor 42 is provided to move the dispersed mixed liquid in the output cavity 16 toward the output port, thereby ensuring the output effect of the dispersed mixed liquid. Among them, the output rotor 42 forms a radial constraint with the stirring shaft 4 through the keyway form, and forms an axial constraint with the pressing of the above-mentioned pressure cover 106. It is fixed at the lower part of the four-dispersed blade group and driven to rotate by the stirring shaft 4. After the final mixed liquid flows into the output cavity from the four-dispersed blade group, the high-speed rotation of the output rotor 42 forms a centrifugal effect, so that the final mixed liquid is discharged from the output cavity.

[0087] In some embodiments, a feed channel 17 for conveying polymer powder toward the first stirring chamber 21 is provided at the top of the mixing drum 1. The feed channel 17 is used to introduce the polymer powder. Specifically, the feed channel 17 is connected to the first stirring chamber 21, and the feed channel 17 is directly above and coaxially arranged with the liquid inlet funnel 223. At the same time, the diameter of the feed channel 17 should be smaller than the diameter of the liquid inlet funnel 223 to ensure that the polymer powder conveyed through the feed channel 17 can completely enter the first stirring chamber 21. Under this design, the polymer powder enters the first stirring chamber 21 from the feed channel 17, and the solvent is introduced from the infusion port 13 on the side of the mixing drum 1, avoiding interference between the introduction of the polymer powder and the introduction of the solvent.

[0088] In some embodiments, a delivery branch 171 for delivering an inert gas or an auxiliary reagent is connected to the sidewall of the feed channel 17. In this design, an inert gas can be delivered into the feed channel 17 through the delivery branch 171, thereby allowing the inert gas to be filled into the mixing drum 1, ensuring the drying effect of the mixing drum 1. The inert gas can be nitrogen, for example. Alternatively, an auxiliary reagent can be delivered into the feed channel 17 through the delivery branch 171, thereby allowing the auxiliary reagent to enter the first stirring chamber 21. The specific composition of the auxiliary reagent is not limited, and it only needs to increase the melting speed of the polymer powder.

[0089] In some embodiments, the mixing drum 1 of the present application includes a base 101, and a support plate is provided at the bottom of the base 101 to support the base 101 on the ground through the support plate. The above-mentioned power source 5 is arranged in the base 101, and the output shaft of the power source 5 is upward, and part of the stirring shaft 4 is passed through the base 101, and the bottom end of the stirring shaft 4 is connected to the output shaft of the power source 5. A mechanical seal fixing plate 102 is provided at the top of the base 101, and the mechanical seal fixing plate 102 is connected and fixed to the base 101 by bolts. The stirring shaft 4 and the mechanical seal fixing plate 102 are connected and constrained by the mechanical dynamic sealing structure of the shaft. This connection method is a conventional technology, so no further explanation is given here.

[0090] A liquid infusion sub 103 is located on top of the mechanical seal mounting plate 102. The isolation sub 11 is positioned coaxially with and within the infusion sub 103. The aforementioned water flow channel 12 is formed between the infusion sub 103 and the isolation sub 11. An infusion port 13 is provided on the infusion sub 103. Solvent enters the water flow channel 12 through the infusion port 13 and then enters the corresponding first stirring chamber 21 or second stirring chamber 31. Furthermore, the bottom of the infusion sub 103 is nested and connected to the top of the mechanical seal mounting plate 102, secured thereto by bolts. An output chamber 16 is formed at the bottom of the infusion sub 103.

[0091] The top cover 104 is connected to the infusion sub 103 and the isolation sub 11 through a stepped nesting structure, creating a structural seal. The top cover 104 is then bolted to the infusion sub 103. A feed channel 17 is provided on the top cover 104 and is coaxially arranged with the isolation sub 11, ensuring that polymer powder introduced through the feed channel 17 falls directly into the inlet funnel 223. A delivery branch 171 is provided on the side of the inlet funnel 223 to introduce inert gas or other chemical reagents for inert gas sealing or reagent addition.

[0092] The rapid dispersion hydration device to be protected by this application also includes a sealing assembly, which includes an "O"-ring, a "T"-ring and a mechanical sealing structure, which are used to seal between the various components of this application to ensure the sealing effect of the device.

[0093] The working process of the rapid dispersion hydration device provided by the present invention is as follows:

[0094] The polymer drag reducer enters through the feed channel 17 on the top cover 104, while the solvent enters the water flow channel 12 through the infusion port 13. The solvent is divided into two parts, entering the first and second liquid inlet chambers 14 and 15 through the first and second liquid inlet ports 111 and 112, respectively. The power source 5 transmits torque to the agitator shaft 4, driving the first dispersing rotor 23, the guide rotor 41, the second dispersing rotor 33, the output rotor 42, and the compression tube 105 to rotate coaxially at high speed. The solvent enters the first liquid inlet chamber 14, where the accumulation level rises and the solvent flows into the liquid inlet funnel 223, where it is pre-wetted with the polymer powder.

[0095] The rotation of the first dispersing rotor 23 creates a centrifugal force, causing the mixture of polymer powder and solvent to pass through the gaps between the teeth of the first dispersing rotor 23. After shearing by the teeth of the first dispersing rotor 23 and grinding in the first assembly gap, the fully dispersed mixture flows out through the gaps between the teeth of the first dispersing stator 22, forming a pre-dispersed mixed liquid that enters the second liquid inlet chamber 15. Due to the relatively small diameter of the first dispersing blade 222, the relatively wide gap between the teeth of the first dispersing stator 22, and the relatively wide gap between the first dispersing stator 22 and the first dispersing rotor 23, the shear strength applied to the polymer drag reducer powder is relatively weak, the dispersion capability is enhanced, and the distribution gaps between the particles are increased, ensuring its full dispersion in the solvent.

[0096] After entering the second liquid inlet chamber 15, the pre-dispersed mixed liquid mixes with the solvent and is driven downward by the guide rotor 41 toward the second dispersing rotor 33. Under the centrifugal force of the second dispersing rotor 33, the pre-dispersed mixed liquid and solvent flow through the tooth gaps of the second dispersing rotor 33 toward the second dispersing stator 32. After secondary shearing between the teeth of the second dispersing rotor 33 and the second dispersing stator 32, and grinding in the second assembly gap, the polymer drag reducer is redispersed in the solvent. The mixture then flows out of the tooth gaps of the second dispersing stator 32 and into the output chamber, forming a final mixed liquid. The final mixed liquid is then discharged from the mixing drum 1 by the output rotor 42, completing rapid dispersion and hydration. Due to the relatively large diameter of the second dispersing blade 232, the relatively narrow tooth side clearance of the second dispersing stator 32, and the relatively narrow gap between the second dispersing stator 32 and the second dispersing rotor 33, the shear strength applied to the polymer drag reducer powder is relatively strong. This structural characteristic increases the contact strength between the polymer particles and water molecules, strengthens the binding effect between the hydrogen bonds on the water molecules and the anionic groups on the polymer molecules, and accelerates the stretching of the polymer molecular chains.

[0097] Compared with the existing polymer drag reducer mixing technology and application process, the present invention is fast, efficient, low-cost, small in space occupation, and has strong mixing ability. It can supply large quantities of polymer drag reducer mixtures in a short time without the need for long dispersion and hydration waiting time, and has outstanding effects.

[0098] Through testing, it was found that when polymer drag reducers were mixed with water solvents, traditional laboratory mixing techniques and equipment could only mix a mixture of no more than 2% by mass, and the mixing process was extremely slow. Only titration-type mixing could be used. After mixing, a large number of transparent flocs were present in the liquid, and the polymer drag reducer was unevenly dispersed. It took 24 hours of standing to achieve the expected performance. Using some existing uniform dispersion devices, the same batch of products was tested to mix a mixture of up to 5% by mass, which was more evenly dispersed. However, the performance of the mixture reached the expected performance after standing for 1-2 hours. Using the rapid dispersion hydration device provided by the present invention to test the same batch of products, the highest mixed mixture was 6% by mass, and the mixing effect was good, the dispersion was even, and there were no transparent flocs. After discharge, the performance of the mixed liquid reached 90% of the theoretical performance. After standing for 15 minutes, the performance reached the expected performance and remained stable.

[0099] Tests show that the device for rapid dispersion and hydration of polymer drag reducers provided by the present invention achieves rapid dispersion and hydration of polymer drag reducers, and the effect far exceeds traditional fracturing fluid drag reducer mixing processes and existing uniform dispersion equipment, providing more powerful technical support for the supply of polymer drag reducers in fracturing operations.

[0100] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0101] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments described herein, but is to be construed in the widest possible manner consistent with the principles and novel features disclosed herein.

Claims

1. A rapid dispersion and hydration device for polymer drag reducers, characterized in that, It includes a mixing drum (1), a first mixing component (2) and a second mixing component (3) arranged inside the mixing drum (1), and a mixing shaft (4) for driving the first mixing component (2) and the second mixing component (3) to rotate. The first mixing component (2) has a first mixing chamber (21) for receiving and accommodating polymer powder and solvent to form a dissolved mixed liquid in the first mixing chamber (21). The first mixing component (2) is arranged to be able to perform a primary shear on the mixed liquid during rotation to obtain a pre-dispersed mixed liquid. The pre-dispersed mixed liquid is secondarily dissolved and hydrated with the introduced solvent in the mixing drum (1) to obtain a secondary mixed liquid. The second mixing chamber (31) is used to receive the secondary mixed liquid, and the second mixing component (3) is arranged to be able to perform a secondary shear on the secondary mixed liquid during rotation to obtain a dispersed mixed liquid; Wherein, the first mixing component (2) includes a first dispersion stator (22) arranged on the inner wall of the mixing drum (1) and a first dispersion rotor (23) arranged on the outer periphery of the mixing shaft (4). A first dispersion cutter tooth group (221) is provided on the circumferential wall of the first dispersion stator (22), and a second dispersion cutter tooth group (231) is provided on the circumferential wall of the first dispersion rotor (23). The first dispersion cutter tooth group (221) and the second dispersion cutter tooth group (231) are buckled to form the first mixing chamber (21). A first feed port (2231) for the polymer powder and the solvent to enter is formed at the top of the first dispersion stator (22).

2. The rapid dispersion and hydration device for polymer drag reducer according to claim 1, characterized in that, The first dispersion stator (22) includes: A first dispersion cutter disc (222) connected to the inner wall of the mixing drum (1). The first dispersion cutter tooth group (221) includes a plurality of first dispersion cutter teeth (2211) arranged at the bottom of the first dispersion cutter disc (222). The plurality of first dispersion cutter teeth (2211) are arranged at intervals along the circumferential direction of the first dispersion cutter disc (222); A liquid inlet funnel (223) arranged at the top of the first dispersion cutter disc (222). The top of the liquid inlet funnel (223) expands outward, and the top of the liquid inlet funnel (223) forms the first feed port (2231).

3. The rapid dispersion and hydration device for polymer drag reducer according to claim 2, wherein, The first dispersion rotor (23) includes a second dispersion cutter disc (232) arranged on the outer periphery of the mixing shaft (4). The second dispersion cutter tooth group (231) includes a plurality of second dispersion cutter teeth (2311) arranged at the top of the second dispersion cutter disc (232). The plurality of second dispersion cutter teeth (2311) are arranged at intervals along the circumferential direction of the second dispersion cutter disc (232).

4. The rapid dispersion and hydration device for polymer drag reducer according to claim 3, wherein, Inside the mixing drum (1), there is a partition short section (11). A water flow channel (12) is formed between the partition short section (11) and the inner wall of the mixing drum (1). On the side wall of the mixing drum (1), there is a liquid infusion port (13) communicating with the water flow channel (12). The first dispersion cutter disc (222) is connected to the inner wall of the partition short section (11), so that the first dispersion cutter disc (222), the partition short section (11) and the top of the mixing drum (1) enclose a first liquid inlet chamber (14). The liquid inlet funnel (223) is located inside the first liquid inlet chamber (14). On the side wall of the partition short section (11), there is a first liquid inlet (111) for communicating the first liquid inlet chamber (14) and the water flow channel (12).

5. The rapid dispersion and hydration device for polymer drag reducer according to claim 4, characterized in that, The second mixing assembly (3) is arranged below the first mixing assembly (2). The second mixing assembly (3) includes a second dispersion stator (32) arranged on the inner wall of the partition short section (11) and a second dispersion rotor (33) arranged on the outer periphery of the mixing shaft (4). On the circumferential wall of the second dispersion stator (32), there is a third dispersion cutter tooth group (321). On the circumferential wall of the second dispersion rotor (33), there is a fourth dispersion cutter tooth group (331). The third dispersion cutter tooth group (321) and the fourth dispersion cutter tooth group (331) are engaged with each other to form the second mixing chamber (31). At the top of the second dispersion stator (32), there is a second feed port (322) for the secondary mixed liquid to enter.

6. The rapid dispersion and hydration device for polymer drag reducer according to claim 5, characterized in that, The second dispersion stator (32) includes a third dispersion cutter disc (323) connected to the bottom of the partition short section (11). The second feed port (322) is formed between the third dispersion cutter disc (323) and the mixing shaft (4). The third dispersion cutter tooth group (321) includes a plurality of third dispersion cutter teeth (3211) arranged at the bottom of the third dispersion cutter disc (323). The plurality of third dispersion cutter teeth (3211) are arranged at intervals along the circumferential direction of the third dispersion cutter disc (323).

7. The rapid dispersion and hydration device for polymer drag reducer according to claim 6, characterized in that The second dispersion rotor (33) includes a fourth dispersion cutter disc (332) arranged on the outer periphery of the mixing shaft (4). The fourth dispersion cutter tooth group (331) includes a plurality of fourth dispersion cutter teeth (3311) arranged at the top of the fourth dispersion cutter disc (332). The plurality of fourth dispersion cutter teeth (3311) are arranged at intervals along the circumferential direction of the fourth dispersion cutter disc (332).

8. The rapid dispersion and hydration device for polymer drag reducer according to claim 6, characterized in that, A second liquid inlet chamber (15) is formed among the first dispersion cutter disc (222), the third dispersion cutter disc (323) and the partition short section (11). On the side wall of the partition short section (11), there is a second liquid inlet (112) for communicating the second liquid inlet chamber (15) and the water flow channel (12).

9. The rapid dispersion and hydration device for polymer drag reducer according to claim 8, characterized in that, On the outer periphery of a part of the mixing shaft (4) located inside the second liquid inlet chamber (15), there is a guide runner (41) for conveying the secondary mixed liquid inside the second liquid inlet chamber (15) towards the second feed port (322).

10. The rapid dispersion and hydration device for polymer drag reducer according to claim 2, characterized in that, The spacing between two adjacent first dispersion cutter teeth (2211) is 5 - 20 mm, and the tooth gap of the first dispersion cutter teeth (2211) is in a symmetric form and the symmetry line intersects at the center of the first dispersion cutter disc (222).

11. The rapid dispersion and hydration device for polymer drag reducer according to claim 3, wherein, The spacing between two adjacent second dispersion cutter teeth (2311) is 5 - 20 mm, and the deflection angle of the two side edges of the second dispersion cutter teeth (2311) along the circumferential direction of the second dispersion cutter disc (232) relative to the extension line in the radial direction of the second dispersion cutter disc (232) is 10 - 30°.

12. The rapid dispersion and hydration device for polymer drag reducer according to claim 6, wherein The spacing between two adjacent third dispersion cutter teeth (3211) is 3 - 10 mm, and the deflection angle of the two side edges of the third dispersion cutter teeth (3211) along the circumferential direction of the third dispersion cutter disc (323) relative to the extension line in the radial direction of the third dispersion cutter disc (323) is 10 - 30°.

13. The rapid dispersion and hydration device for polymer drag reducer according to claim 7, characterized in that, The spacing between two adjacent fourth dispersion cutter teeth (3311) is 3 - 10 mm, and the deflection angle of the two side edges of the fourth dispersion cutter teeth (3311) along the circumferential direction of the fourth dispersion cutter disc (332) relative to the extension line in the radial direction of the fourth dispersion cutter disc (332) is 10 - 30°.

14. The rapid dispersion and hydration device for polymer drag reducer according to claim 7, characterized in that, The tooth pitch of the third dispersion cutter teeth (3211) and the fourth dispersion cutter teeth (3311) is smaller than the tooth pitch of the first dispersion cutter teeth (2211) and the second dispersion cutter teeth (2311).

15. The rapid dispersion and hydration device for polymer drag reducer according to claim 5, wherein, The first assembly gap between the first dispersion cutter tooth group (221) and the second dispersion cutter tooth group (231) is 0.1 - 1 mm, and / or The second assembly gap between the third dispersion cutter tooth group (321) and the fourth dispersion cutter tooth group (331) is 0.1 - 1 mm.

16. The rapid dispersion and hydration device for polymer drag reducer according to claim 1, characterized in that, Below the second stirring assembly (3), there is an output cavity (16) for receiving the dispersed mixture, and the output cavity (16) has an output port for conveying the dispersed mixture.

17. The rapid dispersion and hydration device for polymer drag reducer according to claim 16, characterized in that, On the outer periphery of a part of the stirring shaft (4) located in the output cavity (16), there is an output rotor (42) for conveying the dispersed mixture towards the output port.

18. The rapid dispersion and hydration device for polymer drag reducer according to claim 1, characterized in that, At the top of the stirring cylinder (1), there is a feed channel (17) for conveying the polymer powder towards the first stirring chamber (21).

19. The rapid dispersion and hydration device for polymer drag reducer according to claim 18, wherein, Connected to the side wall of the feed channel (17) is a delivery branch pipe (171) for conveying inert gas or auxiliary reagent.

Images