A gas-liquid mixer

Abstract

The present invention discloses a gas-liquid mixer, which relates to the technical field of gas treatment and solves the technical problems in the related art such as large air flow resistance, complex equipment, and long mixing time in gas-liquid mixing. In the gas-liquid mixer, the Venturi pipe includes an inlet section, a contraction section, a throat section, and a diffusion section that are connected in sequence. The liquid inlet pipe is communicated with the inlet section, the gas inlet pipe is communicated with the inlet section, one end of the diffusion section far away from the throat section is connected to the jet pipe, the horn cap pipe is connected to the jet pipe, the flow splitting cone is installed in the jet pipe, a plurality of guide vanes are all connected to the cone bottom of the flow splitting cone, and all the guide vanes are connected to the inner wall of the jet pipe. The fluid forms a swirling flow after passing through the guide vanes through the flow splitting cone and the guide vanes. By organically combining the technical aspects such as the gas-liquid two-phase flow mechanism and the optimization of the equipment structure, the gas-liquid mixing is completed for the liquid and the gas in a smaller space.

Description

Technical Field

[0001] The present invention relates to the technical field of gas treatment, and particularly relates to a gas-liquid mixer. Background Art

[0002] Common methods for generating microbubbles to promote gas-liquid mixing include the jet method and the mechanical dispersion method.

[0003] The jet method is commonly found in the Venturi tube structure. During the jet process, due to the decrease in diameter and the increase in flow velocity, a certain degree of vacuum is formed, sucking in the gas phase to form a gas-liquid two-phase mixture, which enters the diffuser tube and then forms a jet with a certain pressure and sprays out. The jet method can generate a certain number of small bubbles, but it has the defects of small gas intake, uneven bubble sizes and easy coalescence, and poor gas-liquid mixing effect.

[0004] The mechanical dispersion method specifically involves simultaneously introducing liquid and gas into a container for forced stirring, and using the shear force to cut the gas into tiny bubbles. This method generates a large number of bubbles, but it requires the use of high-power electrical equipment, the equipment manufacturing cost is high, and it is difficult to control the bubble size. Summary of the Invention

[0005] The present application provides a gas-liquid mixer, which solves the technical problems such as large gas flow resistance, complex equipment, and long mixing time existing in gas-liquid mixing in the related art.

[0006] The present application provides a gas-liquid mixer, which includes a Venturi pipe, a liquid inlet pipe, a gas inlet pipe, a jet pipe, a bell mouth pipe, a flow splitting cone and a plurality of guide vanes. The Venturi pipe includes an inlet section, a contraction section, a throat section and a diffuser section connected in sequence. The liquid inlet pipe is communicated with the inlet section, the gas inlet pipe is communicated with the inlet section, one end of the diffuser section far from the throat section is connected with the jet pipe, the bell mouth pipe is connected with the jet pipe, the bell mouth pipe is formed with a connected cap inlet and a cap outlet, the cap inlet is communicated with the jet pipe, the cap outlet is arranged around the jet pipe, the cap outlet is arranged closer to the Venturi pipe than the cap inlet, the flow splitting cone is installed in the jet pipe, the axis of the flow splitting cone is in the same direction as the axis of the jet pipe, the cone top of the flow splitting cone is arranged closer to the diffuser section than the cone bottom, a plurality of guide vanes are all connected with the cone bottom of the flow splitting cone, all the guide vanes are connected with the inner wall of the jet pipe, and the guide vanes are arranged obliquely with respect to the axis of the jet pipe so that the fluid forms a swirl after passing through the guide vanes.

[0007] Optionally, taking the axial direction of the jet pipe as the projection direction, the projection surface formed by projecting all the guide vanes along the projection direction covers the radial cross-section of the lumen of the jet pipe.

[0008] Optionally, the distribution surface of the guide vanes is arranged at an angle of 25°-35° with respect to the axial direction of the jet pipe.

[0009] Optionally, the apex angle range of the flow splitting cone is 100° - 120°.

[0010] Optionally, the gas-liquid mixer further includes at least two connecting plates which are arranged at intervals. The connecting plate includes an opposite first side and a second side. The first side is connected to the outer wall of the jet pipe, and the second side is connected to the inner wall of the horn cap pipe to realize the connection between the horn cap pipe and the jet pipe.

[0011] Optionally, the gas-liquid mixer includes 3 or 4 connecting plates which are evenly circumferentially spaced along the axial direction of the jet pipe.

[0012] Optionally, the horn cap pipe includes a first reduced-diameter section near the cap outlet. The first reduced-diameter section is arranged around the jet pipe, and the inner diameter of the pipe cavity of the first reduced-diameter section gradually increases along the fluid flow direction in the horn cap pipe.

[0013] Optionally, the liquid inlet pipe includes a second reduced-diameter section near the liquid outlet. The inner diameter of the pipe cavity of the second reduced-diameter section gradually decreases along the liquid flow direction in the liquid inlet pipe.

[0014] Optionally, the flow splitting cone is welded to the guide vane, and the guide vane is welded to the jet pipe.

[0015] Optionally, the connecting plate is welded to the jet pipe and the horn cap pipe respectively.

[0016] The beneficial effects of the present application are as follows: The present application provides a gas-liquid mixer. Liquid enters the Venturi pipe through the liquid inlet pipe. A certain negative pressure is formed through the contraction section of the Venturi pipe. Gas is inhaled from the gas inlet pipe and also enters the Venturi pipe, forming a preliminary gas-liquid two-phase mixture, which enters the diffusion section of the Venturi pipe to form a certain pressure jet and then sprays out and enters the jet pipe; in the jet pipe area, the bubbles mixed in the liquid further fission into smaller bubbles; the gas-liquid mixture impacts the diversion cone and disperses, forming a swirl through the guide vanes, and the shear force generated during high-speed swirling is used to further break the bubbles in the gas-liquid mixture, which has the effect of further promoting the mixing of the gas-liquid two phases; the gas-liquid mixture passes through the jet pipe and enters the horn cap pipe through the cap inlet. Since the cap outlet is arranged around the jet pipe and the cap outlet is arranged closer to the Venturi pipe than the cap inlet, it can be known that the connecting pipe cavity between the cap inlet and the cap outlet is a turning setting similar to a U shape. The gas-liquid mixture will impact on the inner wall of the horn cap pipe and then change the flow direction and flow out through the cap outlet, and the impact force further promotes the mixing of the gas-liquid two phases; and the horn cap pipe also significantly reduces the length of the gas-liquid mixer; in summary, the above scheme organically combines technologies such as the gas-liquid two-phase flow mechanism and equipment structure optimization, realizes the gas-liquid mixing of liquid and gas in a smaller space, can significantly reduce the length without increasing the equipment manufacturing cost and manufacturing difficulty, has the advantages of simple structure, good economy and excellent performance, and can effectively save the related costs of equipment manufacturing, operation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention.

[0018] Figure 1 It is the front view of a gas-liquid mixer provided by the present application;

[0019] Figure 2 For Figure 1 The left view of the structure shown;

[0020] Figure 3 For Figure 1 The half-sectional view of the structure shown;

[0021] Figure 4 For Figure 1 The half-sectional axonometric view of the structure shown.

[0022] Attached drawing reference numerals: 100 - Venturi pipe, 110 - Inlet section, 120 - Converging section, 130 - Throat section, 140 - Diverging section, 200 - Liquid inlet pipe, 210 - Second reduced-diameter section, 300 - Gas inlet pipe, 400 - Jet pipe, 500 - Bellmouth pipe, 510 - Cap inlet, 520 - Cap outlet, 530 - First reduced-diameter section, 600 - Diverging cone, 700 - Guide vane, 800 - Connecting plate. Detailed implementation manners

[0023] In an embodiment of the present application, by providing a gas-liquid mixer, technical problems in the related art such as large air flow resistance, complex equipment, and long mixing time in gas-liquid mixing are solved.

[0024] The technical solution in the embodiment of the present application for solving the above technical problems is generally as follows:

[0025] A gas-liquid mixer includes a Venturi pipe, a liquid inlet pipe, a gas inlet pipe, a jet pipe, a bellmouth pipe, a diverging cone, and a plurality of guide vanes. The Venturi pipe includes an inlet section, a converging section, a throat section, and a diverging section that are connected in sequence. The liquid inlet pipe communicates with the inlet section, the gas inlet pipe communicates with the inlet section, one end of the diverging section away from the throat section is connected to the jet pipe, the bellmouth pipe is connected to the jet pipe, the bellmouth pipe is formed with a connected cap inlet and a cap outlet, the cap inlet communicates with the jet pipe, the cap outlet is disposed around the jet pipe, the cap outlet is closer to the Venturi pipe than the cap inlet, the diverging cone is installed in the jet pipe, the axis of the diverging cone is in the same direction as the axis of the jet pipe, the vertex of the diverging cone is closer to the diverging section than the bottom of the cone, a plurality of guide vanes are all connected to the bottom of the diverging cone, all the guide vanes are connected to the inner wall of the jet pipe, and the guide vanes are arranged obliquely with respect to the axis of the jet pipe so that the fluid forms a swirling flow after passing through the guide vanes.

[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings of the specification and specific implementation manners.

[0027] Please refer to Figures 1 to 4 , this embodiment provides a gas-liquid mixer, including a Venturi pipe 100, a liquid inlet pipe 200, a gas inlet pipe 300, a jet pipe 400, a bellmouth pipe 500, a diverging cone 600, and a plurality of guide vanes 700.

[0028] As Figure 3 shown, the Venturi pipe 100 includes an inlet section 110, a converging section 120, a throat section 130, and a diverging section 140 that are connected in sequence. The liquid inlet pipe 200 communicates with the inlet section 110, the gas inlet pipe 300 communicates with the inlet section 110, one end of the diverging section 140 away from the throat section 130 is connected to the jet pipe 400, and the bellmouth pipe 500 is connected to the jet pipe 400.

[0029] Please refer to Figure 1 , Figure 3 and Figure 4 , the horn cap pipe 500 is formed with a connected cap inlet 510 and a cap outlet 520. The cap inlet 510 is communicated with the jet pipe 400. The cap outlet 520 is disposed around the jet pipe 400. The cap outlet 520 is disposed closer to the Venturi pipe 100 than the cap inlet 510. It should be noted that here it is described that the cap outlet 520 as an imaginary entity is disposed around the jet pipe 400. Combining with the fact that the cap outlet 520 is formed by the clamping of the pipe wall of the horn cap pipe 500 and the outer wall of the jet pipe 400, so it is defined that the inner wall of the horn cap pipe 500 near the cap outlet 520 is disposed around the jet pipe 400. In this way, after the gas-liquid mixture enters the horn cap pipe 500 along the jet pipe 400 through the cap inlet 510, it can hit the inner wall of the horn cap pipe 500 and change the flow direction until it flows out from the cap outlet 520.

[0030] Please refer to Figure 3 and Figure 4 , the shunt cone 600 is installed in the jet pipe 400. The axis of the shunt cone 600 is in the same direction as the axis of the jet pipe 400. The cone tip of the shunt cone 600 is disposed closer to the diffuser section 140 than the cone bottom.

[0031] As Figure 4 shown, a plurality of guide vanes 700 are all connected to the cone bottom of the shunt cone 600. All the guide vanes 700 are connected to the inner wall of the jet pipe 400. The guide vanes 700 are disposed obliquely with respect to the axis of the jet pipe 400 so that the fluid forms a swirl after passing through the guide vanes 700. Optionally, the shunt cone 600 is connected to the guide vanes 700 by welding, and the guide vanes 700 are connected to the jet pipe 400 by welding.

[0032] Specifically, in the technical solution of the gas-liquid mixer provided in this embodiment, it includes the following working conditions:

[0033] The liquid enters the Venturi pipe 100 through the liquid inlet pipe 200, forms a certain negative pressure through the contraction section 120 of the Venturi pipe 100, and the gas is inhaled from the gas inlet pipe 300 and also enters the Venturi pipe 100 together to form a preliminary gas-liquid two-phase mixture, enters the diffuser section 140 of the Venturi pipe 100 to form a certain pressure jet and then ejects, and enters the jet pipe 400;

[0034] In the area of the jet pipe 400, the bubbles mixed in the liquid further fission and split into finer bubbles;

[0035] The gas-liquid mixture impinges on the diversion cone 600 and disperses, forms a swirl when passing through the guide vanes 700, and uses the shear force generated during the high-speed swirl to further break the bubbles in the gas-liquid mixture, which has the effect of further promoting the mixing of the gas-liquid two phases;

[0036] Through the jet pipe 400, the gas-liquid mixture enters the horn cap pipe 500 through the cap inlet 510. Since the cap outlet 520 is set to surround the outside of the jet pipe 400 and the cap outlet 520 is closer to the Venturi pipe 100 than the cap inlet 510, it can be seen that the connecting pipe cavity between the cap inlet 510 and the cap outlet 520 is a turning setting similar to a U-shape. The gas-liquid mixture will change its flow direction after impinging on the inner wall of the horn cap pipe and flow out through the cap outlet 520, which further promotes the mixing of the gas-liquid two phases under the action of the impact force; and the horn cap pipe 500 also significantly reduces the length of the gas-liquid mixer.

[0037] In summary, the gas-liquid mixer of this embodiment organically combines technologies such as the gas-liquid two-phase flow mechanism and equipment structure optimization, realizes the gas-liquid mixing of liquid and gas in a smaller space, can significantly reduce the length without increasing the equipment manufacturing cost and manufacturing difficulty, has good gas-liquid mixing effect, a large number of bubbles, uniform bubble size and improves the defect of bubble coalescence, and no longer requires high-power electrical equipment involved in mechanical stirring. It has the advantages of simple structure, good economy and excellent performance, and can effectively save the related costs of equipment manufacturing, operation and maintenance.

[0038] Optionally, please refer to Figure 3 , the liquid inlet pipe 200 includes a second reduced-diameter section 210 near the liquid outlet, and the inner diameter of the pipe cavity of the second reduced-diameter section 210 gradually decreases along the flow direction of the liquid in the liquid inlet pipe 200. Thus, when the liquid enters the Venturi pipe 100 through the liquid inlet pipe 200, the liquid velocity continuously increases and the liquid pressure decreases at the second reduced-diameter section 210, and a certain negative pressure can be formed in advance after entering the Venturi pipe 100. Combined with the contraction section 120 of the Venturi pipe 100, the suction force on the gas at the gas inlet pipe 300 is strengthened, which is beneficial to increasing the air intake of the gas-liquid mixer.

[0039] Optionally, please refer to Figure 3 and Figure 4 , the gas-liquid mixer further includes at least two connecting plates 800, the connecting plates 800 are arranged at intervals from each other, the connecting plates 800 include a relative first side and a second side, the first side is connected to the outer wall of the jet pipe 400, and the second side is connected to the inner wall of the horn cap pipe 500, so as to realize the connection between the horn cap pipe 500 and the jet pipe 400 and ensure that the cap inlet 510 and the cap outlet 520 are in a through setting in the horn cap pipe 500.

[0040] Optionally, the connecting plate 800 is respectively welded to the jet pipe 400 and the horn cap pipe 500, which is convenient for construction and ensures the connection strength.

[0041] Optionally, the gas-liquid mixer includes three or four connecting plates 800, and the connecting plates 800 are evenly circumferentially spaced along the axial direction of the jet pipe 400, that is, a plurality of connecting plates 800 are evenly spaced circumferentially, and the axis of this circumferential direction is consistent with the axis of the jet pipe 400.

[0042] As Figure 1 and Figure 3 shown, the above-mentioned axial direction of the jet pipe 400 is set, and specifically, the inner lumen of the jet pipe 400 is also limited to be linearly distributed.

[0043] Optionally, please refer to Figure 3 , the horn cap pipe 500 includes a first reduced-diameter section 530 near the cap outlet 520, and the first reduced-diameter section 530 is arranged around the outside of the jet pipe 400, and the inner diameter of the lumen of the first reduced-diameter section 530 gradually increases along the fluid flow direction in the horn cap pipe 500. At the first reduced-diameter section 530, the flow rate of the gas-liquid mixture decreases, preparing for the application after the gas-liquid mixer.

[0044] It should be noted that the above-mentioned number of the guide vanes 700 is limited to be multiple, and multiple specifically refers to three or more. When the number of the guide vanes 700 is set to be single or two, the gas-liquid mixture can also form a swirl to a certain extent when passing through, but it is better to set the number of the guide vanes 700 to be multiple.

[0045] Optionally, please refer to Figure 2 and Figure 4 in combination. Taking the axial direction of the jet pipe 400 as the projection direction, the projection surface formed by projecting all the guide vanes 700 along the projection direction covers the radial cross-section of the lumen of the jet pipe 400, which is beneficial to improving the shear force effect of the swirl.

[0046] Preferably, in the gas-liquid mixer of this embodiment, the liquid inlet pipe 200, the Venturi pipe 100, the jet pipe 400, and the flow dividing cone 600 are coaxially arranged.

[0047] Optionally, please refer to Figure 3 and Figure 4 in combination. The distribution surface of the guide vanes 700 is arranged at an angle of 25°-35° with the axial direction of the jet pipe 400, which is reflected in that the guide vanes 700 are inclined and the inclination angle is within the range of 25°-35°.

[0048] Optionally, the vertex angle range of the flow dividing cone 600 is preferably 100°-120°.

[0049] It should also be supplemented that the gas-liquid mixer provided in this embodiment can be used alone or set in groups and arranged and combined according to the internal conditions of the device. For example, when the liquid in the device flows in a swirling direction, multiple gas-liquid mixers are distributed at intervals along a ring. Specifically, it lies in the setting of the liquid inlet of the liquid inlet pipe 200 of the gas-liquid mixer.

[0050] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0051] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A gas-liquid mixer, characterized in that, The gas-liquid mixer includes: A Venturi pipe, including an inlet section, a contraction section, a throat section, and a diffusion section connected in sequence; A liquid inlet pipe, communicating with the inlet section; A gas inlet pipe, communicating with the inlet section; A jet pipe, connected to one end of the diffusion section away from the throat section; A bellmouth pipe, connected to the jet pipe. The bellmouth pipe is formed with a connected cap inlet and a cap outlet. The cap inlet communicates with the jet pipe, and the cap outlet is arranged around the jet pipe. The cap outlet is closer to the Venturi pipe than the cap inlet; A flow splitting cone, installed in the jet pipe. The axis of the flow splitting cone is in the same direction as the axis of the jet pipe. The apex of the flow splitting cone is closer to the diffusion section than the bottom of the cone; and A plurality of guide vanes, all connected to the bottom of the flow splitting cone. All the guide vanes are connected to the inner wall of the jet pipe. The guide vanes are arranged obliquely with respect to the axis of the jet pipe, so that the fluid forms a swirl after passing through the guide vanes; Taking the axis of the jet pipe as the projection direction, the projection surface formed by projecting all the guide vanes along the projection direction covers the radial cross-section of the lumen of the jet pipe; The bellmouth pipe includes a first diameter-changing section near the cap outlet. The first diameter-changing section is arranged around the jet pipe, and the inner diameter of the lumen of the first diameter-changing section gradually increases along the flow direction of the fluid in the bellmouth pipe.

2. The gas-liquid mixer according to claim 1, characterized in that, The distribution surface of the guide vane is arranged at an angle of 25°-35° with the axis of the jet pipe.

3. The gas-liquid mixer according to claim 1, characterized in that The apex angle range of the flow splitting cone is 100°-120°.

4. The gas-liquid mixer according to claim 1, characterized in that, The gas-liquid mixer further includes at least two connecting plates, which are arranged at intervals. The connecting plate includes an opposite first side and a second side. The first side is connected to the outer wall of the jet pipe, and the second side is connected to the inner wall of the bellmouth pipe to realize the connection between the bellmouth pipe and the jet pipe.

5. The gas-liquid mixer according to claim 4, characterized in that, The gas-liquid mixer includes 3 or 4 of the connecting plates, and the connecting plates are evenly circumferentially spaced along the axis of the jet pipe.

6. The gas-liquid mixer according to claim 1, wherein, The liquid inlet pipe includes a second diameter-changing section near the liquid outlet. The inner diameter of the lumen of the second diameter-changing section gradually decreases along the liquid flow direction in the liquid inlet pipe.

7. The gas-liquid mixer according to claim 1, wherein The flow splitting cone is welded to the guide vane, and the guide vane is welded to the jet pipe.

8. The gas-liquid mixer according to claim 4, wherein, The connecting plate is welded to the jet pipe and the bellmouth pipe respectively.

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