Rapid dispersing and hydrating device for polymer drag reducer

Abstract

The invention relates to the field of petroleum fracturing, and discloses a rapid dispersing and hydrating device for a polymer drag reducer. The rapid dispersing and hydrating device comprises a stirring barrel, a first stirring assembly, a second stirring assembly and a stirring shaft, the first stirring assembly is provided with a first stirring cavity, the first stirring assembly is arranged to be capable of conducting primary shearing on mixed liquid in the rotating process to obtain pre-dispersed mixed liquid, and the second stirring cavity is used for receiving secondary mixed liquid; and the second stirring assembly is arranged to be capable of performing secondary shearing on the secondary mixed liquid in the rotating process so as to obtain the dispersed mixed liquid. The rapid dispersing and hydrating device provided by the invention can achieve the purpose of rapid dispersing and hydrating, improves the reaction effect in the change process through a shearing treatment mode, realizes the uniform mixing and rapid hydrating process of a polymer drag reducer, improves the mixing efficiency, ensures the mixing effect, greatly reduces the performance damage of a mixed solution, and is suitable for large-scale production. Meanwhile, the reaction process is accelerated, and polymer performance is quickly exerted.

Description

Technical Field

[0001] The invention relates to the field of petroleum fracturing, in particular to a rapid dispersing hydration device for a polymer drag reducer. Background Art

[0002] With the development and deepening of fracturing technology, the demand for the usage and performance of fracturing fluid is also increasing. Drag reducer, as the main additive for fracturing fluid mixing, is the key component for fracturing fluid viscosity increase and drag reduction. It needs to be pre-configured at a specific concentration and then mixed with other additives and materials to form fracturing fluid.

[0003] With the development of polymer materials, polymer drag reducer products mainly based on acrylamide compounds have emerged. Such products can form drag reducing agents with stable properties by dissolving in water solvents and undergoing hydration. In addition, the production technology of such materials is low in difficulty, and they can be synthesized in large quantities on an industrial scale, with stable supply and low price.

[0004] Polymer powders are very soluble in water solvents. As the mixing concentration increases, it is difficult to achieve uniform mixing of polymers with general mixing technology, and the full hydration time is relatively long. The existing preparation of polymer drag reducers is still carried out in a stirring and additive-adding manner, 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 mixed liquid 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 for 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. Summary of the invention

[0005] In order to solve the above technical problem or at least partially solve the above technical problem, the present invention provides a rapid dispersion and hydration device for a polymer drag reducer.

[0006] 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 used to drive 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 a solvent to form a dissolved mixed liquid in the first stirring chamber, the first stirring component is configured to perform a primary shearing on the mixed liquid during rotation to obtain a pre-dispersed mixed liquid, the pre-dispersed mixed liquid is dissolved and hydrated for a secondary time with an 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 perform a secondary shearing on the secondary mixed liquid during rotation to obtain a dispersed mixed liquid.

[0007] 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, a second dispersing blade tooth group is provided on the peripheral wall of the first dispersing rotor, the first dispersing blade tooth group is engaged with the second dispersing blade tooth group 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.

[0008] Optionally, the first dispersed stator comprises:

[0009] A first dispersing blade disc is connected to the inner wall of the mixing drum, wherein the first dispersing blade tooth group comprises 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;

[0010] 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.

[0011] 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.

[0012] 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 port for connecting the first liquid inlet cavity and the water flow channel is provided on the side wall of the sealing short section.

[0013] 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 isolation short section and a second dispersing rotor arranged on the outer periphery of the stirring shaft, a third dispersing tooth group is arranged on the peripheral wall of the second dispersing stator, and a fourth dispersing tooth group is arranged on the peripheral wall of the second dispersing rotor, the third dispersing tooth group is engaged with the fourth dispersing tooth group 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.

[0014] 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.

[0015] 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.

[0016] Optionally, a second liquid inlet cavity is formed between the first dispersing blade disc, the third dispersing blade disc and the isolation short section, and a second liquid inlet port for connecting the second liquid inlet cavity and the water flow channel is provided on the side wall of the isolation short section.

[0017] 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.

[0018] Optionally, the spacing 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.

[0019] Optionally, the spacing between two adjacent second dispersing blade teeth is 5-20 mm, and the deflection angle of two side edges of the second dispersing blade teeth along the circumferential direction of the second dispersing blade disc relative to the extension line of the radial direction of the second dispersing blade disc is 10-30°.

[0020] Optionally, the spacing between two adjacent third dispersing blade teeth is 3-10 mm, and the deflection angles 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 of the radial direction of the third dispersing blade disc are 10-30°.

[0021] Optionally, the spacing between two adjacent fourth dispersing blade teeth is 3-10 mm, and the deflection angles of the two side edges of the fourth dispersing blade teeth along the circumferential direction of the fourth dispersing blade disc relative to the extension line of the radial direction of the fourth dispersing blade disc are 10-30°.

[0022] 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.

[0023] Optionally, a first assembly gap between the first dispersing blade tooth group and the second dispersing blade tooth group is 0.1-1 mm, and / or

[0024] The second assembly gap between the third dispersing blade tooth group and the fourth dispersing blade tooth group is 0.1-1 mm.

[0025] 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 conveying the dispersed mixed liquid.

[0026] 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.

[0027] Optionally, a feeding channel for conveying the polymer powder toward the first stirring chamber is provided on the top of the stirring drum.

[0028] Optionally, a delivery branch pipe for delivering inert gas or auxiliary reagent is connected to the side wall of the feed channel.

[0029] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0030] The present invention adopts the processing method of the first stirring component and the second stirring component 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, comply with the change law of the polymer drag reducer, and improve the reaction effect in the change process through the shear processing method, so as to achieve uniform mixing and rapid hydration process of the polymer drag reducer, improve the mixing efficiency while ensuring the mixing effect, greatly reduce the damage to the performance of the mixed liquid, accelerate the reaction process, and quickly exert the polymer performance, so that it is more suitable for actual production applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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.

[0032] In order to more clearly illustrate the implementation mode of the present invention or the technical solution in the prior art, the drawings required for use in the implementation mode or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 It is a schematic structural diagram of the cutaway rapid dispersion hydration device according to an embodiment of the present invention;

[0034] Figure 2 A cross-sectional view of the rapid dispersion hydration device according to an embodiment of the present invention;

[0035] Figure 3 This is a schematic structural diagram of the first dispersed stator according to an embodiment of the present invention;

[0036] Figure 4 A bottom view of the first dispersed stator according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic structural diagram of the first dispersing rotor according to an embodiment of the present invention;

[0038] Figure 6 A top view of the first dispersing rotor according to an embodiment of the present invention;

[0039] Figure 7 This is a schematic structural diagram of the second dispersed stator according to an embodiment of the present invention;

[0040] Figure 8 A bottom view of the second dispersed stator according to an embodiment of the present invention;

[0041] Fig. 9 This is a schematic structural diagram of the second dispersing rotor according to an embodiment of the present invention;

[0042] Fig.10 FIG. 4 is a top view of the second dispersing rotor according to an embodiment of the present invention.

[0043] Description of Reference Numerals

[0044] 1. Mixing drum; 101. Base; 102. Mechanical seal fixing plate; 103. Infusion short section; 104. Top cover; 105. Compression tube; 106. Pressure cover; 11. Seal short section; 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 dispersing stator; 221. First dispersing blade tooth group; 2211. First dispersing blade tooth; 222. First dispersing blade disc; 223. Liquid inlet funnel; 2231, first feed inlet; 23, first dispersing rotor; 231, second dispersing blade tooth group; 2311, second dispersing blade tooth; 232, second dispersing blade 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 inlet; 323, third dispersing blade disc; 33, second dispersing rotor; 331, fourth dispersing blade tooth group; 3311, fourth dispersing blade tooth; 332, fourth dispersing blade disc; 4, stirring shaft; 41, guide rotor; 42, output rotor; 5, power source. DETAILED DESCRIPTION

[0045] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0046] 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; obviously, the implementation methods in the specification are only part of the implementation methods of the present invention, rather than all of the implementation methods.

[0047] Combination Figure 1 and Figure 2 As shown, the rapid dispersion hydration device for polymer drag reducer provided by the embodiment of the present invention comprises a mixing drum 1, a first mixing assembly 2 and a second mixing assembly 3 arranged inside the mixing drum 1, and a mixing shaft 4 for driving the first mixing assembly 2 and the second mixing assembly 3 to rotate. It can be understood that a power source 5 should also be provided inside the mixing drum 1 to drive the mixing shaft 4 to rotate through the power source 5. The rotating shaft extends in the vertical direction, 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 with a motor and a power source such as a motor pulley transmission.

[0048] The first stirring component 2 has a first stirring chamber 21 for receiving and containing the polymer powder and the solvent to form a dissolved mixed liquid in the first stirring chamber 21. The first stirring component 2 is configured to perform a shearing operation on the mixed liquid during the rotation process to obtain a pre-dispersed mixed liquid. The pre-dispersed mixed liquid is dissolved and hydrated with the introduced solvent in the stirring barrel 1 to obtain a secondary mixed liquid. The second stirring chamber 31 is used to receive the secondary mixed liquid, and the second stirring component 3 is configured to perform a secondary shearing operation on the secondary mixed liquid during the rotation process to obtain a dispersed mixed liquid. The solvent may be an aqueous solvent or the like.

[0049] In this design, the power source 5 drives the stirring shaft 4 to rotate, so as to drive the first stirring component 2 and the second stirring component 3 to rotate coaxially through the stirring shaft 4, and the polymer drag reducer and the solvent enter the first stirring chamber 21 of the first stirring component 2 for pre-wetting and start the dissolution process. The first stirring component 2 rotates to form a pre-mixed liquid of polymer fracturing fluid and solvent through centrifugal action. After the mixed liquid and the solvent are mixed, they enter the second stirring chamber 31 of the second stirring component 3 for secondary dispersion to form a final mixed liquid, and the final mixed liquid is discharged. The present invention combines the hydration characteristics of the polymer drag reducer, divides the mixing process of the polymer drag reducer and the solvent into pre-dispersion and secondary dispersion, cooperates with the dispersion effect of the mechanical structure, effectively improves the dispersion and hydration effect of the polymer drag reducer, and greatly accelerates the dispersion and hydration process of the polymer drag reducer, so as to achieve the purpose of rapid dispersion and hydration.

[0050] 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, comply with the change law of the polymer drag reducer, and improve the reaction effect in the change process through the shear processing method, so as to achieve uniform mixing and rapid hydration process of the polymer drag reducer, improve the mixing efficiency while ensuring the mixing effect, greatly reduce the damage to the performance of the mixed liquid, accelerate the reaction process, and quickly exert the polymer performance, so that it is more suitable for actual production applications.

[0051] In some embodiments, in combination Figure 1 and Figure 2 As shown, 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 arranged on the peripheral wall of the first dispersing stator 22, and a second dispersing blade tooth group 231 is arranged 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 port 2231 is formed on the top of the first dispersing stator 22 for polymer powder and solvent to enter.

[0052] In this design, the polymer powder and the solvent enter the first stirring chamber 21 formed by the first dispersing blade tooth group 221 and the second dispersing blade tooth group 231 through the first feed port 2231, and as the stirring shaft 4 drives the first dispersing rotor 23 to rotate, the polymer powder is dissolved in the first stirring chamber 21 to obtain a premixed liquid. The second dispersing blade tooth group 231 is located inside the first dispersing blade tooth group 221, and the premixed liquid flows from the tooth gap of the second dispersing blade tooth group 231 to the tooth gap of the first dispersing blade tooth group 221, and then flows out from the tooth gap of the first dispersing blade tooth group 221 to obtain and transport a primary product.

[0053] As a feasible implementation method, combined with Figure 3 and Figure 4 As shown, 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 arranged at the bottom of the first dispersing blade disc 222. The plurality of first dispersing blade teeth 2211 are arranged at intervals along the circumferential direction of the first dispersing blade disc 222. The liquid inlet funnel 223 is arranged at the top of the first dispersing blade disc 222, and the top of the liquid inlet funnel 223 is expanded outward, and the top of the liquid inlet funnel 223 forms a first feed port 2231. Among them, a gap is formed between two adjacent first dispersing blade teeth 2211 to allow the fluid to flow out evenly. The first dispersing stator 22 is arranged below the top cover 104 of the mixing drum 1, and is used to receive the polymer powder transported through its top. After the polymer powder enters the liquid inlet funnel 223, it slides downward under the action of the slope surface, which is convenient for the aggregation of the material. The first dispersing blade teeth 2211 are detachable and evenly arranged centripetally and installed at the bottom of the first dispersing blade disc 222 .

[0054] Combination Figure 5 and Figure 6 As shown, the first dispersing rotor 23 includes a second dispersing blade disc 232 arranged on the outer periphery of the stirring shaft 4, and the second dispersing blade tooth group 231 includes a plurality of second dispersing blade teeth 2311 arranged on the top of the second dispersing blade disc 232, and the plurality of second dispersing blade teeth 2311 are arranged at intervals along the circumferential direction of the second dispersing blade disc 232. Under this design, a tooth gap is formed between two adjacent second dispersing blade teeth 2311 to allow the fluid to flow out evenly. At the same time, since the stirring shaft 4 drives the second dispersing blade disc 232 to rotate, the second dispersing blade disc 232 drives the plurality of second dispersing blade teeth 2311 to rotate, so that when the fluid passes through the gap, it is sheared by the second dispersing blade teeth 2311. Among them, the second dispersing blade disc 232 is constrained on the stirring shaft 4 in the form of a keyway to form a radial constraint. This constraint method is a conventional technology in the art, so it is not described in detail here. The second dispersing blade teeth 2311 are detachable and are evenly arranged and installed on the top of the second dispersing blade disc 232 in a centripetal manner.

[0055] In this design, the polymer drag reducer and the solvent enter the first stirring chamber 21 of the first stirring component 2 for pre-wetting, and the dissolution process begins. The first stirring component 2 rotates to form a premixed liquid with the polymer fracturing fluid and the solvent through centrifugal action. The premixed liquid flows from the tooth gap of the second dispersing blade 2311 to the tooth gap of the first dispersing blade 2211, and then flows out from the tooth gap of the first dispersing blade 2211. During this period, the premixed liquid undergoes high-speed shearing of the first dispersing blade 2211 and the second dispersing blade 2311. And because a first assembly gap is formed between the first dispersing blade 2211 and the second dispersing blade 2311, the premixed liquid is ground in the first assembly gap to destroy the agglomeration or fisheye of the polymer drag reducer in the premixed liquid, so that the polymer drag reducer is evenly dispersed, fully contacted with the solvent, and the dissolution process is accelerated, and finally a pre-dispersed mixed liquid is formed, which flows into the subsequent isolation short section 11 and is brought into the second stirring component 3 by the rotation and drainage of the guide rotor 41.

[0056] Combination Figure 1 and Figure 2 As shown, a sealing short section 11 is provided inside the mixing drum 1, a water flow channel 12 is formed between the sealing short section 11 and the inner wall of the mixing drum 1, a liquid infusion port 13 connected to the water flow channel 12 is provided on the side wall of the mixing drum 1, and a first dispersing blade disc 222 is connected to the inner wall of the sealing short section 11. Specifically, the first dispersing blade disc 222 is nested and connected to the top of the sealing short section 11, so that the sealing short section 11 is located below the first dispersing blade disc 222, and the top of the sealing short section 11 is sealed by the first dispersing blade disc 222. The first dispersing blade disc 222, the sealing short section 11 and the top of the mixing drum 1 form a first liquid inlet cavity 14, and the liquid inlet funnel 223 is located in the first liquid inlet cavity 14. A first liquid inlet port 111 for connecting the first liquid inlet cavity 14 and the water flow channel 12 is provided on the side wall of the sealing short section 11.

[0057] During operation, the solvent enters the water flow channel 12 from the infusion port 13, and 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, and gradually accumulates in the first liquid inlet chamber 14 until the solvent flows from the liquid inlet funnel 223 into the first stirring chamber 21, and contacts the polymer powder in the first stirring chamber 21, so that the polymer powder is dissolved. 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 the delivery of the solvent through the side of the stirring drum 1, which is convenient for separating the delivery of the solvent and the delivery of the polymer powder to avoid mutual influence.

[0058] In some embodiments, the second stirring component 3 is arranged below the first stirring component 2, and the second stirring component 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 is engaged with the fourth dispersing tooth group 331 to form a second stirring chamber 31, and a second feed port 322 for the secondary mixed liquid to enter is formed at the top of the second dispersing stator 32.

[0059] 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 gaps of the fourth dispersing tooth group 331 to the tooth gaps of the third dispersing tooth group 321, and then flows out from the tooth gaps of the third dispersing tooth group 321 to obtain and transport the target product.

[0060] As a feasible implementation method, combined with Figure 7 and Figure 8 As shown, the second dispersing stator 32 includes a third dispersing blade disc 323 connected to the bottom of the isolation short section 11, so as to block the bottom end of the isolation short section 11 through the third dispersing blade disc 323. A second feed inlet 322 is formed between the third dispersing blade disc 323 and the stirring shaft 4, that is, a through hole is concentrically provided in the middle of the third dispersing blade disc 323, and the diameter of the through hole is greater than the diameter of the stirring shaft 4, so that a ring-shaped second feed inlet 322 can be formed between the third dispersing blade disc 323 and the stirring shaft 4. The third dispersing blade tooth group 321 includes a plurality of third dispersing blade teeth 3211 arranged at the bottom of the third dispersing blade disc 323, and the plurality of third dispersing blade teeth 3211 are arranged at intervals along the circumferential direction of the third dispersing blade disc 323, and a gap is formed between two adjacent third dispersing blade teeth 3211 for uniform flow of fluid. The third dispersing blade teeth 3211 are in a detachable form and are evenly arranged and installed at the bottom of the third dispersing blade disc 323 in a concentric manner.

[0061] Combination Fig. 9 and Fig.10As shown, the second dispersing rotor 33 includes a fourth dispersing blade disc 332 disposed on the outer periphery of the stirring shaft 4, and the fourth dispersing blade tooth group 331 includes a plurality of fourth dispersing blade teeth 3311 disposed on the top of the fourth dispersing blade disc 332, and the plurality of fourth dispersing blade teeth 3311 are arranged at intervals along the circumferential direction of the fourth dispersing blade disc 332. In this design, a tooth gap is formed between two adjacent fourth dispersing blade teeth 3311 to allow the fluid to flow out evenly. At the same time, since the stirring shaft 4 drives the fourth dispersing blade disc 332 to rotate, the fourth dispersing blade disc 332 drives the plurality of fourth dispersing blade teeth 3311 to rotate, so that when the fluid passes through the gap, it is sheared by the fourth dispersing blade teeth 3311. Among them, the fourth dispersing blade disc 332 is constrained on the stirring shaft 4 in the form of a keyway to form a radial constraint. In addition, the fourth dispersing blade disc 332 can be axially constrained by the compression tube 105. This constraint method is a conventional technology in the art, so it 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 .

[0062] The first dispersing blade disc 222, the third dispersing blade disc 323 and the isolation short section 11 form a second liquid inlet chamber 15, and the pre-dispersed mixed liquid output by the first stirring component 2 enters the second liquid inlet chamber 15. The side wall of the isolation short section 11 is provided with a second liquid inlet port 112 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 long strip holes arranged on the side wall of the isolation short section 11, and the plurality of long strip holes are arranged at intervals along the circumferential direction of the isolation short section 11, so that the plurality of long strip holes are evenly distributed on the periphery of the isolation short section 11, wherein the size and number of the long strip holes are determined by the specific solvent required for dispersion, and preferably there are four long strip 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 with the pre-dispersed mixed liquid in the second liquid inlet chamber 15, and 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 an infusion port 13, making the overall structure more compact.

[0063] The outer periphery of the part of the stirring shaft 4 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 moves toward the axial direction of the stirring shaft 4 and is 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 guide effect of the guide rotor 41.

[0064] 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 stirring shaft 4, a clamping tube 105 is provided above the step position of the stirring shaft 4, the top of the clamping tube 105 is supported on the bottom of the guide rotor 41, and a pressure cap 106 is also provided at the top end of the stirring shaft 4, the pressure cap 106 presses the second dispersing blade disc 232 toward the step direction of the stirring shaft 4 to form an axial constraint of the second dispersing blade disc 232, thereby preventing the second dispersing blade disc 232, the guide rotor 41 and the clamping tube 105 from moving along the axial direction of the stirring shaft 4, wherein the pressure cap 106 can be screwed on the top end of the stirring shaft 4 to ensure the clamping effect of the pressure cap 106. Under this design, the power source 5 can transmit torque to the stirring shaft 4, and the stirring shaft 4 can drive the second dispersing blade disc 232, the fourth dispersing blade disc 332, the guide rotor 41, the output rotor 42 described below and the clamping tube 105 to rotate coaxially at high speed.

[0065] When in use, the pre-dispersed mixed liquid and the solvent entering the second liquid inlet chamber 15 are brought into the second stirring chamber 31 by the guide rotor 41. Under the rotation and centrifugal action of the second dispersing rotor 33, the pre-dispersed mixed liquid and the newly-incoming solvent flow from the tooth gap of the fourth dispersing blade teeth 3311 to the third dispersing blade teeth 3211, and flow out from the tooth gap of the third dispersing blade teeth 3211. During the flow process, the pre-dispersed mixed liquid and the newly-incoming solvent are secondary dissolved and hydrated, and 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 arranged at intervals to form a second assembly gap between the first dispersing blade teeth 2211 and the second dispersing blade teeth 2311. The pre-dispersed mixed liquid and the solvent are ground in the second assembly gap, and the micelles and floccules in the pre-dispersed mixed liquid are destroyed and fully contacted with the newly-incoming solvent, so that the polymer drag reducer is more evenly dispersed, the hydration reaction conditions are more sufficient, and the hydration process is accelerated to form a final mixed liquid.

[0066] 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.

[0067] like Figure 4 As shown, 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 and the symmetry line intersects 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.

[0068] like Figure 6 As shown, the spacing between two adjacent second dispersing blade teeth 2311 is 5-20 mm, the deflection angles of the two side edges of the second dispersing blade teeth 2311 along the circumferential direction of the second dispersing blade disc 232 relative to the extension line of the radial direction of the second dispersing blade disc 232 are 10-30°, and the front angle along the rotation direction is smaller than the rear angle. Specifically, the distance between the corresponding oblique sides of two adjacent second dispersing blade teeth 2311 is a2, the front blade angle of the second dispersing blade teeth 2311 is b1, the rear blade angle is b2, the range of a2 is 5-20 mm, the ranges of b1 and b2 are 10-30°, and b1<b2.

[0069] like Figure 8 As shown, the spacing between two adjacent third dispersing blade teeth 3211 is 3-10 mm, and the deflection angles of the two side edges of the third dispersing blade teeth 3211 along the circumferential direction of the third dispersing blade disc 323 relative to the extension line of the radial direction of the third dispersing blade disc 323 are 10-30°. Specifically, the distance between the corresponding oblique sides of two adjacent third dispersing blade teeth 3211 is a3, the tooth spacing inclination angle is b3, the range of a3 is 3-10 mm, and the range of b3 is 10-30°.

[0070] like Fig.10 As shown, the spacing between two adjacent fourth dispersing blade teeth 3311 is 3-10 mm, and the deflection angles of the two side edges of the fourth dispersing blade teeth 3311 along the circumferential direction of the fourth dispersing blade disc 332 relative to the extension line of the radial direction of the fourth dispersing blade disc 332 are 10-30°. Specifically, the distance between the corresponding oblique sides of two adjacent fourth dispersing blade teeth 3311 is a4, the tooth spacing inclination angle is b4, the range of a4 is 3-10 mm, the range of b4 is 10-30°, and b4>b3.

[0071] 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 to ensure that the mixed liquid can be evenly dispersed.

[0072] In some embodiments, the first assembly gap between the first dispersing blade tooth group 221 and the second dispersing blade tooth group 231 is 0.1-1mm. In this design, the first dispersing blade tooth group 221 and the second dispersing blade tooth group 231 are spaced apart. After the polymer powder and the solvent enter the first stirring chamber 21, a mixed liquid is formed. The mixed liquid flows into the first assembly gap through the gap of the second dispersing blade tooth group 231, and then flows to the first dispersing blade tooth group 221. The mixed liquid is sheared and ground once by the high-speed rotating second dispersing blade tooth group 231 and the first dispersing blade tooth group 221. The first assembly gap here is determined according to the specific number of molecules and particle size of the polymer drag reducer used. When the particle size of the polymer drag reducer is about 70-100 mesh, the first assembly gap is 0.3-0.5mm.

[0073] In some embodiments, the second assembly gap between the third dispersing blade tooth group 321 and the fourth dispersing blade tooth group 331 is 0.1-1mm. In this design, the third dispersing blade tooth group 321 and the fourth dispersing blade tooth group 331 are arranged at intervals, and the secondary mixed liquid obtained after the mixed liquid and the solvent are mixed enters the second stirring chamber 31. The secondary mixed liquid flows into the second assembly gap between the third dispersing blade tooth group 321 and the fourth dispersing blade tooth group 331 through the gap of the fourth dispersing blade tooth group 331, and then flows to the third dispersing blade tooth group 321. The high-speed rotating fourth dispersing blade tooth group 331 and the third dispersing blade tooth group 321 perform secondary shearing and grinding on the secondary mixed liquid. The second assembly gap here is determined according to the specific number of molecules and particle size of the polymer drag reducer used. When the particle size of the polymer drag reducer is about 70-100 mesh, the second assembly gap is 0.2-0.4mm. The second assembly gap should be larger than the first assembly gap.

[0074] 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 conveying the dispersed mixed liquid. After the dispersed mixed liquid enters the output cavity 16, it is conveyed to the target position through the conveying port to facilitate the collection of the dispersed mixed liquid.

[0075] Further optimized, the outer periphery of the part 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 large, 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 a keyway, and forms an axial constraint with the pressing of the above-mentioned pressure cover 106. It is fixed at the bottom of the four-dispersed blade tooth 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 tooth 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.

[0076] 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, and the feed channel 17 is used to introduce polymer powder. Specifically, the feed channel 17 is connected to the first stirring chamber 21, and the feed channel 17 is located directly above the liquid inlet funnel 223 and is 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. In 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 the mutual interference between the introduction of the polymer powder and the introduction of the solvent.

[0077] In some embodiments, a delivery branch pipe 171 for delivering inert gas or auxiliary reagent is connected to the side wall of the feed channel 17. In this design, the inert gas can be delivered to the feed channel 17 through the delivery branch pipe 171, and then the inert gas is filled into the mixing drum 1 to ensure the drying effect of the mixing drum 1, wherein the inert gas can be nitrogen or the like. Alternatively, the auxiliary reagent is delivered to the feed channel 17 through the delivery branch pipe 171, and then the auxiliary reagent enters the first stirring chamber 21, wherein the specific composition of the auxiliary reagent is not limited, and it is only necessary to increase the melting speed of the polymer powder.

[0078] 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, and the stirring shaft 4 and the mechanical seal fixing plate 102 are connected and constrained by the mechanical dynamic seal structure of the shaft. This connection method is a conventional technology, so no further explanation is given here.

[0079] The top of the mechanical seal fixing plate 102 is provided with an infusion nipple 103, the isolation nipple 11 is arranged inside the infusion nipple 103 and is arranged coaxially with the infusion nipple 103, the above-mentioned water flow channel 12 is formed between the infusion nipple 103 and the isolation nipple 11, the infusion port 13 is arranged on the infusion nipple 103, the 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. In addition, the bottom of the infusion nipple 103 is nested and connected with the top of the mechanical seal fixing plate 102, and then fixed by bolts, and an output cavity 16 is formed at the bottom of the infusion nipple 103.

[0080] The top cover 104 is connected to the infusion sub 103 and the isolation sub 11 by step nesting for structural sealing, and then the top cover 104 is fixed to the infusion sub 103 by bolts. The feed channel 17 is arranged on the top cover 104, and the feed channel 17 is coaxially arranged with the isolation sub 11 to ensure that the polymer powder introduced through the feed channel 17 can directly fall into the liquid inlet funnel 223. The delivery branch pipe 171 is arranged on the side of the liquid inlet funnel 223, and is used to introduce inert gas or other chemical reagents for inert gas sealing or reagent addition.

[0081] The rapid dispersion hydration device to be protected by the present application also includes a sealing assembly, which includes an "O"-shaped sealing ring, a "T"-shaped sealing ring and a mechanical sealing structure, which is used for sealing between the various components of the present application to ensure the sealing effect of the device.

[0082] The working process of the rapid dispersion hydration device provided by the present invention is as follows:

[0083] The polymer drag reducer enters from the feed channel 17 on the top cover 104, and the solvent enters the water flow channel 12 from the infusion port 13. The solvent is divided into two parts, which enter the first liquid inlet cavity 14 and the second liquid inlet cavity 15 through the first liquid inlet 111 and the second liquid inlet 112 respectively. The power source 5 transmits torque to the stirring 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 cavity 14, the accumulated liquid level in the first liquid inlet cavity 14 rises and flows into the liquid inlet funnel 223 to be pre-wetted with the polymer powder.

[0084] The rotation of the first dispersing rotor 23 forms a centrifugal effect, so that the mixture of the polymer powder and the solvent passes through the tooth gap of the first dispersing rotor 23. After being sheared by the teeth of the first dispersing rotor 23 and ground by the first assembly gap, the polymer drag reducer is fully dispersed in the solvent and flows out from the tooth gap of the first dispersing stator 22 to form a pre-dispersed mixed liquid and enter the second liquid inlet chamber 15.

[0085] After the pre-dispersed mixed liquid enters the second liquid inlet chamber 15, it mixes with the solvent and is driven by the guide rotor 41 to flow downward to the second dispersing rotor 33. Under the centrifugal action of the second dispersing rotor 33, the pre-dispersed mixed liquid and the solvent flow from the tooth gap of the second dispersing rotor 33 to the second dispersing stator 32. After the secondary tooth shearing and the second assembly gap grinding of the second dispersing rotor 33 and the second dispersing stator 32, the polymer drag reducer is dispersed in the solvent again, flows out from the tooth gap of the second dispersing stator 32, flows into the output chamber, forms a final mixed liquid, and is discharged from the mixing drum 1 by the output rotor 42, completing the rapid dispersion and hydration.

[0086] 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 mixed liquid in a short time without long dispersion and hydration waiting time, and has outstanding effect.

[0087] 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, there were a large number of transparent flocs 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 have a maximum mixed mixture of 5% by mass, and the dispersion was relatively uniform, but the performance of the mixed solution reached the expected performance after standing for 1h-2h. Using the rapid dispersion and hydration device provided by the present invention for testing, the same batch of products was tested to have a maximum mixed mixture of 6% by mass, and the mixing effect was good, the dispersion was uniform, and there were no transparent flocs. After discharge, the performance of the mixed solution reached 90% of the theoretical performance, and after standing for 15 minutes, the performance reached the expected performance and remained stable.

[0088] It can be seen from the test that the device for rapid dispersion and hydration of polymer drag reducers provided by the present invention realizes rapid dispersion and hydration of polymer drag reducers, and the effect is far superior to the traditional fracturing fluid drag reducer mixing process and existing uniform dispersion equipment, providing more powerful technical support for the supply of polymer drag reducers in fracturing operations.

[0089] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0090] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be 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 will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A rapid dispersion hydration device for polymer drag reducers, characterized in that: The invention comprises a stirring drum (1), a first stirring component (2) and a second stirring component (3) arranged inside the stirring drum (1), and a stirring shaft (4) for driving the first stirring component (2) and the second stirring component (3) to rotate, wherein the first stirring component (2) has a first stirring chamber (21) for receiving and accommodating polymer powder and solvent so as to form a dissolved mixed liquid in the first stirring chamber (21), the first stirring component (2) is configured to perform a primary shearing on the mixed liquid during rotation to obtain a pre-dispersed mixed liquid, the pre-dispersed mixed liquid is dissolved and hydrated with the introduced solvent in the stirring 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 component (3) is configured to perform a secondary shearing on the secondary mixed liquid during rotation to obtain a dispersed mixed liquid.

2. The rapid dispersion hydration device for polymer drag reducer according to claim 1, characterized in that: The first stirring assembly (2) comprises 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 tooth group (221) is arranged on the peripheral wall of the first dispersing stator (22); a second dispersing tooth group (231) is arranged on the peripheral wall of the first dispersing rotor (23); the first dispersing tooth group (221) and the second dispersing tooth group (231) are engaged with each other to form the first stirring chamber (21); and a first feed inlet (2231) for the polymer powder and the solvent to enter is formed on the top of the first dispersing stator (22).

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

4. The rapid dispersion hydration device for polymer drag reducer according to claim 3, characterized in that: The first dispersing rotor (23) includes a second dispersing blade disc (232) arranged on the periphery of the stirring shaft (4), and the second dispersing blade tooth group (231) includes a plurality of second dispersing blade teeth (2311) arranged on the top of the second dispersing blade disc (232), and the plurality of second dispersing blade teeth (2311) are arranged at intervals along the circumferential direction of the second dispersing blade disc (232).

5. The rapid dispersion hydration device for polymer drag reducer according to claim 4, characterized in that: A sealing short section (11) is provided inside the mixing drum (1), a water flow channel (12) is formed between the sealing short section (11) and the inner wall of the mixing drum (1), a liquid infusion port (13) connected to the water flow channel (12) is provided on the side wall of the mixing drum (1), the first dispersing blade disc (222) is connected to the inner wall of the sealing short section (11), so that the first dispersing blade disc (222), the sealing short section (11) and the top of the mixing drum (1) form a first liquid inlet cavity (14), the liquid inlet funnel (223) is located in the first liquid inlet cavity (14), and a first liquid inlet port (111) for connecting the first liquid inlet cavity (14) and the water flow channel (12) is provided on the side wall of the sealing short section (11).

6. The rapid dispersion hydration device for polymer drag reducer according to claim 5, characterized in that: The second stirring assembly (3) is arranged below the first stirring assembly (2), and the second stirring assembly (3) comprises 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 arranged on the peripheral wall of the second dispersing stator (32), and a fourth dispersing tooth group (331) is arranged 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 the second stirring chamber (31); and a second feed inlet (322) for the secondary mixed liquid to enter is formed on the top of the second dispersing stator (32).

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

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

9. The rapid dispersion hydration device for polymer drag reducer according to claim 7, characterized in that: A second liquid inlet cavity (15) is formed between the first dispersing blade disc (222), the third dispersing blade disc (323) and the isolation short section (11), and a second liquid inlet port (112) for connecting the second liquid inlet cavity (15) and the water flow channel (12) is provided on the side wall of the isolation short section (11).

10. The rapid dispersion hydration device for polymer drag reducer according to claim 9, characterized in that: 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).

11. The rapid dispersion hydration device for polymer drag reducer according to claim 3, characterized in that: The distance 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 and the symmetry line intersects at the center of the first dispersing blade disc (222).

12. The rapid dispersion hydration device for polymer drag reducer according to claim 4, characterized in that: The spacing between two adjacent second dispersing blade teeth (2311) is 5-20 mm, and the deflection angle of the two side edges of the second dispersing blade teeth (2311) along the circumferential direction of the second dispersing blade disc (232) relative to the extension line of the radial direction of the second dispersing blade disc (232) is 10-30°.

13. The rapid dispersion hydration device for polymer drag reducer according to claim 7, characterized in that: The spacing between two adjacent third dispersing blade teeth (3211) is 3-10 mm, and the deflection angle of the two side edges of the third dispersing blade teeth (3211) along the circumferential direction of the third dispersing blade disc (323) relative to the extension line of the radial direction of the third dispersing blade disc (323) is 10-30°.

14. The rapid dispersion hydration device for polymer drag reducer according to claim 8, characterized in that: The spacing between two adjacent fourth dispersing blade teeth (3311) is 3-10 mm, and the deflection angle of the two side edges of the fourth dispersing blade teeth (3311) along the circumferential direction of the fourth dispersing blade disc (332) relative to the extension line of the radial direction of the fourth dispersing blade disc (332) is 10-30°.

15. The rapid dispersion hydration device for polymer drag reducer according to claim 8, characterized in that: The tooth pitch of the third dispersing blade teeth (3211) and the fourth dispersing blade teeth (3311) is smaller than the tooth pitch of the first dispersing blade teeth (2211) and the second dispersing blade teeth (2311).

16. The rapid dispersion hydration device for polymer drag reducer according to claim 6, characterized in that: A first assembly gap between the first dispersing blade tooth group (221) and the second dispersing blade tooth group (231) is 0.1-1 mm, and / or The second assembly gap between the third dispersing blade tooth group (321) and the fourth dispersing blade tooth group (331) is 0.1-1 mm.

17. The rapid dispersion hydration device for polymer drag reducer according to claim 1, characterized in that: An output cavity (16) for receiving the dispersed mixed liquid is provided below the second stirring component (3), and the output cavity (16) has an output port for conveying the dispersed mixed liquid.

18. The rapid dispersion hydration device for polymer drag reducer according to claim 17, characterized in that: An output rotor (42) for conveying the dispersed mixed liquid toward the output port is provided on the outer periphery of the portion of the stirring shaft (4) located in the output cavity (16).

19. The rapid dispersion hydration device for polymer drag reducer according to claim 1, characterized in that: A feeding channel (17) for conveying the polymer powder toward the first stirring chamber (21) is provided at the top of the stirring drum (1).

20. The rapid dispersion hydration device for polymer drag reducer according to claim 19, characterized in that: A delivery branch pipe (171) for delivering inert gas or auxiliary reagent is connected to the side wall of the feed channel (17).

Images