Self-suction type gas-liquid mixing paddle and reaction kettle

Abstract

The utility model provides a self-suction type gas-liquid mixing paddle and a reaction kettle, and relates to the field of stirring paddles. The self-suction type gas-liquid mixing paddle comprises a supporting shaft, a Venturi paddle and a connecting pipe, the supporting shaft is provided with a containing cavity, and an air inlet communicating with the containing cavity is formed in the side wall of the supporting shaft. The Venturi paddle comprises a contraction section, a throat pipe section and a diffusion section, the contraction section and the diffusion section are connected with the two ends of the throat pipe section respectively, and the cross sectional area of the contraction section and the cross sectional area of the diffusion section are gradually increased from the end close to the throat pipe section to the end away from the throat pipe section; one end of the connecting pipe is communicated with one end, far away from the air inlet, of the supporting shaft at an included angle, and the other end of the connecting pipe is communicated with the throat pipe section at an included angle; the self-suction type gas-liquid mixing paddle provided by the utility model solves the technical problems of low reaction rate and high energy consumption of a reaction kettle in the prior art.

Description

Technical Field

[0001] The present application relates to the field of stirring paddles, and in particular to a self-priming gas-liquid mixing paddle and a reactor. Background Art

[0002] In the heterogeneous reaction processes in the fields of petrochemicals, fine chemicals, biochemicals, and pharmaceutical chemicals, catalytic hydrogenation processes, oxidation reactions, and amination synthesis all require the reaction of liquid materials and gases. In order to increase the reaction rate and reduce energy consumption, it is necessary to increase the gas molecule content in the liquid. In the existing technology, the methods usually adopted are to increase the pressure of the reactor or add a self-priming agitator.

[0003] The main principle of the method of increasing the pressure of the reactor is to increase the solubility of gas in liquid through high pressure, which has the problem of high energy consumption.

[0004] See also Figure 1 The main principle of the method of adding a self-priming agitator is that the agitator paddle in the agitator is a hollow structure. When the agitator rotates, the blade generates centrifugal force, forming a negative pressure at the center of the shaft, and sucking in gas from the outside; the gas is ejected through the hole of the blade; and then other blades are used to break up the gas, increasing the gas content and solubility rate in the liquid; there is a problem of large bubble diameter. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a self-priming gas-liquid mixing paddle and a reactor to alleviate the technical problems of low reaction rate and high energy consumption of reactors in the prior art.

[0006] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0007] In a first aspect, the self-priming gas-liquid mixing paddle provided by the present invention comprises a support shaft, a venturi paddle and a connecting pipe;

[0008] The support shaft has an accommodating cavity, and the side wall of the support shaft is provided with an air inlet communicating with the accommodating cavity;

[0009] The Venturi paddle includes a contraction section, a throat section, and a diffusion section, wherein the contraction section and the diffusion section are respectively connected to both ends of the throat section, and the cross-sectional areas of the contraction section and the diffusion section gradually increase from the end close to the throat section to the end far from the throat section;

[0010] One end of the connecting pipe is connected to the end of the support shaft away from the air inlet at an angle, and the other end is connected to the throat section at an angle, and the axis of the support shaft is arranged at an angle to the axis of the throat section.

[0011] Furthermore, an end of the contraction section away from the throat section is connected to an inlet section, and a cross-sectional area of ​​the inlet section is the same as a maximum cross-sectional area of ​​the contraction section.

[0012] Furthermore, the inlet section, the contraction section, the throat section and the diffusion section are integrally formed, and their axes are collinear.

[0013] Furthermore, the self-priming gas-liquid mixing paddle also includes a mounting seat, which is sleeved on an end of the support shaft away from the air inlet and connected to the Venturi paddle.

[0014] Furthermore, the mounting seat includes a sleeve and a mounting member, the sleeve is sleeved on the support shaft, one end of the mounting member is connected to the outer wall of the sleeve, and the other end is connected to the Venturi paddle.

[0015] Furthermore, the connecting pipe is located between the air inlet and the mounting seat;

[0016] The connecting pipe, the mounting member and the supporting shaft are arranged in a triangle.

[0017] Furthermore, a first connecting protrusion is provided on the side wall of the Venturi paddle, and a second connecting protrusion is provided on the end of the mounting member facing away from the sleeve member, and the first connecting protrusion and the second connecting protrusion are detachably connected via a fastener.

[0018] Furthermore, the Venturi paddles and the connecting tubes are both provided in plurality, the plurality of Venturi paddles are arranged at intervals along the circumference of the support shaft, and the plurality of Venturi paddles are connected to the plurality of connecting tubes in a one-to-one correspondence.

[0019] Furthermore, the outer wall of the support shaft is provided with a protrusion, and the protrusion is provided with an air inlet communicated with the accommodating cavity.

[0020] In a second aspect, the reactor provided by the present invention comprises a reactor body and a self-priming gas-liquid mixing paddle as described in any one of the above items;

[0021] The kettle body has a liquid level surface, above which is gas and below which is liquid material;

[0022] The support shaft of the self-priming gas-liquid mixing paddle extends into the kettle body and rotates with the kettle body. The air inlet of the self-priming gas-liquid mixing paddle is located above the liquid level surface, and the Venturi paddle is located below the liquid level surface.

[0023] Based on the above technical solutions, the technical effects that can be achieved by this utility model are analyzed as follows:

[0024] The self-priming gas-liquid mixing paddle provided by the utility model includes a support shaft, a Venturi paddle and a connecting pipe; the support shaft has a accommodating cavity, and the side wall of the support shaft is provided with an air inlet connected to the accommodating cavity; the Venturi paddle includes a contraction section, a throat section and a diffusion section, the contraction section and the diffusion section are respectively connected to the two ends of the throat section, and the cross-sectional areas of the contraction section and the diffusion section gradually increase from the end close to the throat section to the end away from the throat section; one end of the connecting pipe is connected to the end of the support shaft away from the air inlet at an angle, and the other end is connected to the throat section at an angle, and the axis of the support shaft is arranged at an angle to the axis of the throat section.

[0025] The support shaft has a accommodating cavity and an air inlet connected to the accommodating cavity, so that gas can enter the accommodating cavity from the air inlet; the two ends of the connecting pipe are respectively connected to the support shaft and the Venturi paddle, so that gas can flow through the accommodating cavity and the interior of the connecting pipe and then enter the Venturi paddle, and the Venturi paddle is connected to the support shaft, and when the support shaft rotates, the Venturi paddle is driven to rotate. The contraction section and the diffusion section are connected to the two ends of the throat section respectively, and the cross-sectional areas of the contraction section and the diffusion section gradually increase from the end close to the throat section to the end far from the throat section. According to the Venturi effect generated by the Bernoulli principle, when the material liquid flows through the narrowest section of the throat section of the Venturi paddle, the flow velocity at the throat section will increase and the pressure will decrease, and a low-pressure area will be formed in the throat section. Therefore, the gas will enter the Venturi paddle through the air inlet, the accommodating cavity and the connecting pipe in sequence; as the gas and material liquid enter the diffusion section, the cross-section gradually increases, the fluid slows down, and the pressure rises. The Venturi paddle fully mixes the inhaled gas and material liquid, and shears the bubbles into micron or millimeter scales, and ejects them from the diffusion section. The axis of the support shaft is arranged at an angle to the axis of the throat section, so that the self-priming gas-liquid mixing paddle can generate radial flow while mixing the gas and liquid, achieving the effect of uniform distribution of bubbles.

[0026] When using this self-priming gas-liquid mixing paddle, it is placed inside the reactor body. Gas can enter the support shaft's holding cavity through the air inlet and then enter the throat section of the Venturi paddle through the connecting pipe. The support shaft rotates, driving the Venturi paddle to rotate through the connecting pipe. The material liquid flows into the Venturi paddle, passes through the contraction section, and then flows through the throat section at high speed, forming a low pressure in the throat section. The gas is drawn from the holding cavity into the throat section and mixed with the material liquid. The gas-liquid mixture is fully mixed in the diffusion section, and the bubbles are sheared to micrometer or millimeter scales. The fully mixed gas-liquid mixture is ejected from the diffusion section and diffuses within the reactor body.

[0027] Compared with traditional impeller-type blades, the self-priming gas-liquid mixing paddle can achieve a larger diameter, which optimizes the radial distribution of bubbles and uniform mixing; the fluid resistance is small, reducing energy consumption during operation; the material liquid and gas can be fully mixed in the diffusion section, and the bubbles can be sheared into micron level under changes in air pressure and flow rate, which can make the bubbles smaller, increase the gas content and solubility rate in the liquid, and increase the reaction speed.

[0028] The self-priming gas-liquid mixing paddle solves the problems of high energy consumption and low gas holdup, reduces the bubble diameter, increases the bubble specific surface area, and improves the gas-liquid mass transfer rate, thereby increasing the solubility rate of gas in liquid, reducing the reactor pressure, and improving the reaction speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a schematic diagram in the background technology;

[0031] Figure 2 A schematic structural diagram of a self-priming gas-liquid mixing paddle provided in an embodiment of the present application;

[0032] Figure 3 A schematic diagram of the internal structure of the self-priming gas-liquid mixing paddle provided in an embodiment of the present application;

[0033] Figure 4 A top view of the self-priming gas-liquid mixing paddle provided in an embodiment of the present application;

[0034] Figure 5 A schematic diagram of the internal structure of the Venturi paddle in the self-priming gas-liquid mixing paddle provided in an embodiment of the present application;

[0035] Figure 6 A schematic structural diagram of the Venturi paddle in the self-priming gas-liquid mixing paddle provided in an embodiment of the present application;

[0036] Figure 7 A schematic structural diagram of a mounting seat in a self-priming gas-liquid mixing paddle provided in an embodiment of the present application;

[0037] Figure 8 Schematic diagram of the internal structure of the reactor provided in the embodiment of this application Figure 1 ;

[0038] Figure 9 Schematic diagram of the internal structure of the reactor provided in the embodiment of this application Figure 2 .

[0039] icon:

[0040] 100-support shaft; 110-accommodation cavity; 120-protrusion; 130-air inlet;

[0041] 200 - Venturi paddle; 210 - inlet section; 220 - contraction section; 230 - throat section; 240 - diffusion section; 250 - Venturi air inlet; 260 - first connecting protrusion; 261 - first protrusion; 262 - second protrusion;

[0042] 300-connecting pipe;

[0043] 400 - mounting seat; 410 - sleeve member; 420 - mounting member; 421 - second connecting protrusion;

[0044] 500-kettle body; A-liquid level surface. DETAILED DESCRIPTION

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0046] In the description of this application, it should be noted that the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0047] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0048] Example 1

[0049] In the heterogeneous reaction process in the fields of petrochemicals, fine chemicals, biochemicals and pharmaceutical chemicals, catalytic hydrogenation processes, oxidation reactions and amination synthesis all require the reaction of liquid materials and gases. In order to increase the reaction rate and reduce energy consumption, it is necessary to increase the gas molecule content in the liquid. There are two main methods generally used: one is to increase the pressure of the reactor to increase the solubility of the gas in the liquid through high pressure, which has the problem of high energy consumption; see Figure 1The other is to add a self-priming agitator. The agitator's stirring paddle is designed to be a hollow structure. When rotating, the blades generate centrifugal force, forming a negative pressure at the center of the shaft, sucking gas from the outside, and the gas is ejected through the holes in the blades; other blades are then used to break up the gas, increasing the gas content and solubility in the liquid; it rotates at a speed of 300-1500r / min, and the centrifugal force generated inside the impeller reduces the pressure to 0.05-0.1MPa, forming a continuous negative pressure environment, and the inhaled gas is injected into the liquid phase through the exhaust hole, and then another stirring paddle generates turbulence to crush the bubbles; there is a problem of large bubbles.

[0050] In view of this, see Figures 2 to 5 The self-priming gas-liquid mixing paddle provided by the embodiment of the present invention includes a support shaft 100, a Venturi paddle 200 and a connecting pipe 300; the support shaft 100 has a accommodating cavity 110, and the side wall of the support shaft 100 is provided with an air inlet 130 connected to the accommodating cavity 110; the Venturi paddle 200 includes a contraction section 220, a throat section 230 and a diffusion section 240, the contraction section 220 and the diffusion section 240 are respectively connected to the two ends of the throat section 230, and the cross-sectional areas of the contraction section 220 and the diffusion section 240 gradually increase from the end close to the throat section 230 to the end away from the throat section 230; one end of the connecting pipe 300 is connected to the end of the support shaft 100 away from the air inlet 130 at an angle, and the other end is connected to the throat section 230 at an angle, and the axis of the support shaft 100 is arranged at an angle to the axis of the throat section 230.

[0051] Specifically, see Figure 3 The support shaft 100 is configured as a shaft structure with closed ends and a hollow center; and an air inlet 130 is provided on the side wall of the support shaft 100 so that gas can enter the interior of the support shaft 100 from the air inlet 130. Figure 3 The connecting pipe 300 is configured as a shaft structure with open ends and a hollow center. The throat section 230 is provided with a Venturi air inlet 250. The ends of the connecting pipe 300 are connected to the support shaft 100 and the Venturi air inlet 250, respectively, allowing gas to enter the Venturi paddle 200 through the connecting pipe 300. Furthermore, the angle between the axis of the Venturi paddle 200 and the horizontal direction can be designed according to actual needs. The angle between the axis of the Venturi paddle 200 and the tangent of the installation location can also be designed according to actual needs. By adjusting the installation angle of the Venturi paddle 200, the direction of the gas-liquid mixture can be changed. The mixture can be ejected rearward along the circumferential tangent of the support shaft 100, or radially outward, upward, downward, downward, or upward. This allows the integrated stirring paddle to generate radial flow while mixing gas and liquid, achieving uniform radial distribution of bubbles within the kettle body 500. Preferably, the axis of the Venturi paddle 200 is within 35 degrees of the rotational tangent.

[0052] The support shaft 100 has a accommodating cavity 110 and an air inlet 130 connected to the accommodating cavity 110, so that gas can enter the accommodating cavity 110 from the air inlet 130; the two ends of the connecting tube 300 are respectively connected to the support shaft 100 and the Venturi paddle 200, so that gas can flow through the interior of the accommodating cavity 110 and the connecting tube 300 and then enter the Venturi paddle 200, and the Venturi paddle 200 is connected to the support shaft 100, and when the support shaft 100 rotates, the Venturi paddle 200 is driven to rotate. The contraction section 220 and the diffusion section 240 are respectively connected to the two ends of the throat section 230, and the cross-sectional areas of the contraction section 220 and the diffusion section 240 gradually increase from the end close to the throat section 230 to the end far away from the throat section 230. According to the Venturi effect generated by the Bernoulli principle, when the material liquid flows through the narrowest section of the throat section 230 of the Venturi paddle 200, the flow velocity at the throat section 230 will increase and the pressure will decrease, and a low-pressure area will be formed in the throat section 230. Therefore, the gas will enter the Venturi paddle 200 through the air inlet 130, the accommodating chamber 110 and the connecting pipe 300 in turn; as the gas and material liquid enter the diffusion section 240, the cross-sectional area gradually increases, the fluid decelerates, and the pressure rises. The Venturi paddle 200 fully mixes the inhaled gas with the material liquid, and shears the bubbles into micron or millimeter scales, and sprays them out from the diffusion section 240. The axis of the support shaft 100 is arranged at an angle to the axis of the throat section 230 , so that the self-priming gas-liquid mixing paddle can generate radial flow while mixing gas and liquid, thereby achieving the effect of uniform distribution of bubbles.

[0053] When using the self-priming gas-liquid mixing paddle, it is placed in the reactor body 500; gas can enter the accommodating chamber 110 of the support shaft 100 through the air inlet 130, and then enter the throat section 230 of the venturi paddle 200 through the connecting pipe 300. The support shaft 100 rotates, driving the venturi paddle 200 to rotate through the connecting pipe 300; the material liquid flows into the venturi paddle 200, passes through the contraction section 220, and then flows through the throat section 230 at high speed, forming a low pressure in the throat section 230, sucking the gas from the accommodating chamber 110 into the throat section 230 and mixing it with the material liquid; the gas-liquid mixture is fully mixed in the diffusion section 240, and the bubbles are sheared to micrometer or millimeter scales; the fully mixed gas-liquid mixture is ejected from the diffusion section 240 and diffused in the reactor body 500.

[0054] Compared with traditional impeller-type blades, the self-priming gas-liquid mixing paddle can have a larger diameter, which optimizes the radial distribution and uniform mixing of bubbles; the fluid resistance is small, reducing energy consumption during operation; the material liquid and gas can be fully mixed in the diffusion section 240, and the bubbles can be sheared into micron level under the changes in air pressure and flow rate, which can make the bubbles smaller, increase the gas content and solubility rate in the liquid, and increase the reaction speed.

[0055] The self-priming gas-liquid mixing paddle solves the problems of high energy consumption and low gas holdup, reduces the bubble diameter, increases the bubble specific surface area, and improves the gas-liquid mass transfer rate, thereby increasing the solubility rate of gas in liquid, reducing the reactor pressure, and improving the reaction speed.

[0056] The following is a detailed description of the structure and shape of the self-priming gas-liquid mixing paddle:

[0057] In an optional solution provided by an embodiment of the present invention, the end of the contraction section 220 away from the throat section 230 is connected to the inlet section 210 , and the cross-sectional area of ​​the inlet section 210 is the same as the maximum cross-sectional area of ​​the contraction section 220 .

[0058] Specifically, in this embodiment, see Figure 5 The cross sections of the contraction section 220, the throat section 230, the diffusion section 240 and the inlet section 210 are all circular; the diameter of the inlet section 210 remains unchanged.

[0059] The inlet section 210 is used to allow the material liquid to enter the venturi paddle 200, thereby performing gas-liquid mixing.

[0060] In the optional solution provided by the embodiment of the present invention, the inlet section 210, the contraction section 220, the throat section 230 and the diffusion section 240 are integrally formed, and the axes are collinear.

[0061] Specifically, a mold is used to form Venturi paddle 200, which includes an inlet section 210, a converging section 220, a throat section 230, and a diffuser section 240. This improves the connection strength between adjacent components and ensures a tight seal. The axes of inlet section 210, converging section 220, throat section 230, and diffuser section 240 are aligned, facilitating processing while ensuring a smooth inner surface of Venturi paddle 200 and avoiding blind spots.

[0062] In the optional solution provided by the embodiment of the present invention, the self-priming gas-liquid mixing paddle further includes a mounting seat 400 , which is sleeved on the end of the support shaft 100 away from the air inlet 130 and connected to the Venturi paddle 200 .

[0063] Specifically, see Figure 2 The mounting seat 400 is sleeved on the outer circumference of the support shaft 100 and is located at the end of the support shaft 100 away from the air inlet 130. The support shaft 100 rotates, driving the Venturi paddle 200 to rotate together through the mounting seat 400. The material liquid flows into the Venturi paddle 200. When the liquid passes through the inlet section 210, the contraction section 220, and flows through the throat section 230 at high speed, low pressure is formed, and the gas above is sucked in through the Venturi air inlet 250 and mixed with the material liquid. The gas-liquid mixture is fully mixed in the diffusion section 240, and the bubbles are sheared into micrometer or millimeter scales. It is ejected from the Venturi paddle 200 and diffused in the reactor.

[0064] The mounting base 400 strengthens the connection strength between the support shaft 100 and the Venturi paddle 200 , further ensuring that when the support shaft 100 rotates, the Venturi paddle 200 rotates accordingly.

[0065] In the optional solution provided by the embodiment of the present invention, the mounting seat 400 includes a sleeve 410 and a mounting member 420. The sleeve 410 is sleeved on the support shaft 100. One end of the mounting member 420 is connected to the outer wall of the sleeve 410, and the other end is connected to the Venturi paddle 200.

[0066] Specifically, see Figure 7 The sleeve 410 is configured as a clamp, which is fixed to the outer wall of the support shaft 100 by a key. Furthermore, the number of the mounting members 420 is the same as the number of the Venturi blades 200.

[0067] The sleeve 410 enables the mounting seat 400 to be fixed on the support shaft 100 ; the mounting member 420 enables the sleeve 410 to be connected to the Venturi paddle 200 .

[0068] In the optional solution provided by the embodiment of the present invention, the connecting pipe 300 is located between the air inlet 130 and the mounting seat 400; the connecting pipe 300, the mounting member 420 and the support shaft 100 are arranged in a triangle.

[0069] Specifically, see Figure 3 The axis of the mounting member 420 is perpendicular to the axis of the support shaft 100, and the axis of the connecting tube 300 is arranged at an angle to the axis of the mounting member 420 and the axis of the support shaft 100, thereby forming a triangular arrangement of the connecting tube 300, the mounting member 420, and the support shaft 100. The perpendicularity of the axis of the mounting member 420 to the axis of the support shaft 100 reduces the length of the mounting member 420 and allows the three elements to be stably fixed together using the triangular structure, thereby improving the stability of the structure.

[0070] The connecting pipe 300, the mounting member 420 and the supporting shaft 100 are arranged in a triangle. The triangular structure is stable, which enhances the overall strength of the self-priming gas-liquid mixing paddle.

[0071] In the optional solution provided by the embodiment of the present invention, the side wall of the Venturi paddle 200 is provided with a first connecting protrusion 260, and the end of the mounting part 420 facing away from the sleeve part 410 is provided with a second connecting protrusion 421, and the first connecting protrusion 260 and the second connecting protrusion 421 are detachably connected by fasteners.

[0072] Specifically, see Figure 6 and Figure 7The first connecting protrusion 260 includes a first protrusion 261 and a second protrusion 262. One end of the first protrusion 261 is connected to the side wall of the venturi paddle 200, and the other end is perpendicularly connected to the second protrusion 262. The second connecting protrusion 421 is in contact with the second protrusion 262 and is connected by a fastener. The fastener can be a screw or a bolt.

[0073] The second protrusion 262 is connected to the second connecting protrusion 421, which increases the contact area between the venturi paddle 200 and the mounting member 420 and improves the connection strength.

[0074] As another embodiment, the venturi paddle 200 is fixedly connected to the mounting base 400 .

[0075] In the optional solutions provided by the embodiments of the present invention, see Figure 4 , Figure 4 This is a top view of a self-priming gas-liquid mixing paddle, wherein the support shaft 100 rotates in the direction of rotation shown in the figure, i.e., clockwise. Multiple Venturi paddles 200 and connecting tubes 300 are provided. The multiple Venturi paddles 200 are arranged at intervals along the circumference of the support shaft 100, and the multiple Venturi paddles 200 are connected to the multiple connecting tubes 300 in a one-to-one correspondence.

[0076] Specifically, 2 to 8 Venturi paddles 200 are provided; the number of connecting pipes 300 is consistent with the number of Venturi paddles 200 .

[0077] Multiple Venturi blades 200 and connecting pipes 300 are provided, thereby improving the efficiency of gas-liquid mixing.

[0078] In an optional solution provided by an embodiment of the present invention, a protrusion 120 is provided on the outer wall of the support shaft 100 , and the protrusion 120 is provided with an air inlet 130 communicating with the accommodating cavity 110 .

[0079] Specifically, the protrusion 120 is welded to the outer wall of the support shaft 100 and is fixedly connected to the support shaft 100. The air inlet 130 passes through the protrusion 120 and the outer wall of the support shaft 100, communicating with the internal accommodating cavity 110 of the support shaft 100. Furthermore, a plurality of protrusions 120 are provided, and the multiple protrusions 120 are spaced apart along the circumference of the support shaft 100, and each protrusion 120 is provided with an air inlet 130, thereby improving air intake efficiency.

[0080] The protrusion 120 is provided to facilitate the user to identify the air inlet 130 of the support shaft 100 .

[0081] Example 2

[0082] The reactor provided in the embodiment of the present invention includes the self-priming gas-liquid mixing paddle described in the first embodiment, and therefore also has all the beneficial effects of the first embodiment, which will not be described in detail here.

[0083] In the optional scheme provided by the embodiment of the present invention, the reactor includes a reactor body 500; the reactor body 500 has a liquid level surface A, above the liquid level surface A is gas, and below the liquid level surface A is liquid material; the support shaft 100 in the self-priming gas-liquid mixing paddle extends into the reactor body 500 and rotates with the reactor body 500, the air inlet 130 in the self-priming gas-liquid mixing paddle is located above the liquid level surface A, and the Venturi paddle 200 is located below the liquid level surface A.

[0084] Specifically, see Figure 8 and Figure 9 , above the liquid level A is gas, and below is liquid material; the air inlet 130 of the support shaft 100 is set above the liquid level A, and the gas can enter the accommodating chamber 110 through the air inlet 130 of the support shaft 100, and then enter the venturi paddle 200 through the connecting pipe 300. For further information, see Figure 9 The support shaft 100 is realized by the transmission system outside the kettle body 500. Figure 9 The venturi paddle 200 rotates clockwise and drives the venturi paddle 200 to rotate in the liquid. The transmission system is connected to one end of the air inlet 130 of the support shaft 100; a gap is left between the end of the support shaft 100 away from the air inlet 130 and the bottom wall of the kettle body 500.

[0085] Gas above the liquid level A in the reactor enters the inner cavity of the support shaft 100 through the air inlet 130 of the support shaft 100 and is connected to the throat section 230 of the Venturi paddle 200 via the connecting pipe 300. When the drive system outside the reactor drives the support shaft 100 to rotate clockwise, the support shaft 100 drives the Venturi paddle 200 to rotate via the mounting bracket 400. Liquid feed enters through the inlet section 210 of the Venturi paddle 200 and exits through the diffuser section 240. According to the Venturi effect generated by Bernoulli's principle, when liquid feed flows through the narrowest section of the throat section 230 of the Venturi paddle 200, the flow velocity increases and the pressure decreases at the throat section 230, forming a low-pressure zone there. Therefore, gas above the liquid level A enters the Venturi paddle 200 through the air inlet 130 of the support shaft 100, the chamber 110, and the connecting pipe 300 in sequence. As the gas and liquid enter the diffuser 240, the cross-section of the diffuser 240 gradually expands, the fluid decelerates, and the pressure rises. The venturi paddle 200 thoroughly mixes the inhaled gas and liquid, and shears the bubbles into micrometer or millimeter scale before ejecting them from the diffuser 240.

[0086] It should be noted that, unless there is any conflict, the features in the embodiments of this application can be combined with each other.

[0087] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A self-priming gas-liquid mixing paddle, characterized in that: include: A support shaft (100), a Venturi paddle (200) and a connecting pipe (300); The support shaft (100) has a receiving cavity (110), and a side wall of the support shaft (100) is provided with an air inlet (130) communicating with the receiving cavity (110); The Venturi paddle (200) comprises a contraction section (220), a throat section (230) and a diffusion section (240), wherein the contraction section (220) and the diffusion section (240) are respectively connected to two ends of the throat section (230), and the cross-sectional areas of the contraction section (220) and the diffusion section (240) gradually increase from an end close to the throat section (230) to an end away from the throat section (230); One end of the connecting pipe (300) is connected to the end of the support shaft (100) away from the air inlet (130) at an angle, and the other end is connected to the throat section (230) at an angle, and the axis of the support shaft (100) and the axis of the throat section (230) are arranged at an angle.

2. The self-priming gas-liquid mixing paddle according to claim 1, characterized in that: One end of the contraction section (220) facing away from the throat section (230) is connected to an inlet section (210), and the cross-sectional area of ​​the inlet section (210) is the same as the maximum cross-sectional area of ​​the contraction section (220).

3. The self-priming gas-liquid mixing paddle according to claim 2, characterized in that: The inlet section (210), the contraction section (220), the throat section (230), and the diffusion section (240) are integrally formed, and their axes are collinear.

4. The self-priming gas-liquid mixing paddle according to claim 1, characterized in that: The self-priming gas-liquid mixing paddle further comprises a mounting seat (400), wherein the mounting seat (400) is sleeved on an end of the support shaft (100) away from the air inlet (130) and is connected to the Venturi paddle (200).

5. The self-priming gas-liquid mixing paddle according to claim 4, characterized in that: The mounting seat (400) comprises a sleeve member (410) and a mounting member (420), wherein the sleeve member (410) is sleeved on the support shaft (100), and one end of the mounting member (420) is connected to the outer wall of the sleeve member (410), and the other end is connected to the Venturi paddle (200).

6. The self-priming gas-liquid mixing paddle according to claim 5, characterized in that: The connecting pipe (300) is located between the air inlet (130) and the mounting seat (400); The connecting pipe (300), the mounting member (420), and the supporting shaft (100) are arranged in a triangle.

7. The self-priming gas-liquid mixing paddle according to claim 5, characterized in that: A first connecting protrusion (260) is provided on the side wall of the Venturi paddle (200), and a second connecting protrusion (421) is provided on one end of the mounting member (420) facing away from the sleeve member (410), and the first connecting protrusion (260) and the second connecting protrusion (421) are detachably connected via a fastener.

8. The self-priming gas-liquid mixing paddle according to any one of claims 1 to 7, characterized in that: A plurality of the Venturi paddles (200) and the connecting pipes (300) are provided, the plurality of Venturi paddles (200) are arranged at intervals along the circumference of the support shaft (100), and the plurality of Venturi paddles (200) are connected to the plurality of connecting pipes (300) in a one-to-one correspondence.

9. The self-priming gas-liquid mixing paddle according to claim 1, characterized in that: The outer wall of the support shaft (100) is provided with a protrusion (120), and the protrusion (120) is provided with an air inlet (130) in communication with the accommodating cavity (110).

10. A reactor, characterized in that: It comprises a kettle body (500) and a self-priming gas-liquid mixing paddle according to any one of claims 1 to 9; The kettle body (500) has a liquid level surface, with gas above the liquid level surface and liquid material below the liquid level surface; The support shaft (100) of the self-priming gas-liquid mixing paddle extends into the kettle body (500) and is rotatably engaged with the kettle body (500); the air inlet (130) of the self-priming gas-liquid mixing paddle is located above the liquid level, and the Venturi paddle (200) is located below the liquid level.

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