Gas-liquid mixing technology, gas-liquid mixer and gas-liquid mixture conveying method

Abstract

The invention discloses a gas-liquid mixing technology, a gas-liquid mixer and a gas-liquid mixture conveying method, target liquid is enabled to spontaneously form a strand-shaped spiral liquid flow consistent with the cross section shape of a flow channel through the spiral flow channel with specific geometrical characteristics in the advancing process, and compressed gas is injected into the liquid flow in the flow channel through a gas hole formed in a cylinder. According to the gas-liquid mixing device, compressed gas is cut and broken from a liquid phase interface in the advancing process of liquid flow to form bubbles dispersed in the liquid flow so as to realize gas-liquid mixing, and the gas-liquid mixing device is in a stable turbulent flow state in the conveying process and has the advantages of high gas-liquid mixing rate, good uniformity and simple structure; and in the gas-liquid mixture conveying process, the impact effect is generated on the gas-liquid mixture through the spherical cavity in the spherical tee joint, so that the gas-liquid mixture is subjected to secondary uniform mixing, gas-liquid separation in the conveying process is effectively prevented, the gas-liquid mixing rate is increased, the fire extinguishing effect is guaranteed, and the gas-liquid mixing device is far superior to the prior art.

Description

Technical Field

[0001] This application relates to the field of fire protection technology, and specifically to a gas-liquid mixing technology, a gas-liquid mixer, and a gas-liquid mixture transportation method. Background Art

[0002] In the field of fire protection technology, fine water mist has been developed vigorously and gradually replaced halon fire extinguishing agents because of its excellent cooling effect, strong ability to inhibit oxidation reactions during combustion, very superior effectiveness in blocking heat radiation transfer, being able to effectively block strong heat radiation, and being environmentally friendly. To further improve the fire extinguishing performance of fine water mist, gas is added to the fire protection liquid to form a gas-liquid mixture. However, in the prior art, mechanical stirring, Venturi tube type, or natural diffusion methods are usually used for gas-liquid mixing. These methods have deficiencies such as complex mechanical structures, high maintenance costs, poor mixing uniformity, and easy gas-liquid separation during transportation. Therefore, it is necessary to solve the above technical problems. Summary of the Invention

[0003] The purpose of this application is to provide a gas-liquid mixing technology, a gas-liquid mixer, and a gas-liquid mixture transportation method to solve the problems in the prior art.

[0004] To achieve the above purpose, this application provides the following technical solution: A gas-liquid mixing technology, which forms a strand-like spiral liquid flow with set parameters for a target liquid, and introduces several strands of compressed gas into the liquid phase interface of the liquid flow with a set diameter. The liquid flow cuts and breaks the compressed gas from the liquid phase interface to form bubbles dispersed in the liquid flow to achieve gas-liquid mixing.

[0005] Furthermore, the spiral movement of the liquid flow is also used to evenly disperse the bubbles in the liquid flow.

[0006] Furthermore, the parameters at least include the inner diameter, outer diameter, pitch, cross-sectional shape size, and length for defining the spiral geometry of the liquid flow.

[0007] Furthermore, the direction of introducing the compressed gas is the normal direction of the liquid phase interface.

[0008] Furthermore, the compressed gas mixed into the liquid flow is also used to increase the flow rate of the liquid flow.

[0009] This application also provides a gas-liquid mixer for implementing the above gas-liquid mixing technology, including: A housing 2, which is hollow and has openings at both ends; A spiral generator 4 is installed on the shell 2 and blocks the opening at one end thereof; the spiral generator 4 comprises a cylinder 401 extending into the shell 2, and a spiral blade 402 arranged on the outer wall of the cylinder 401, wherein the outer circumferential surface of the spiral blade 402 abuts against the inner wall of the shell 2; the spiral blade 402, the inner wall of the shell 2, and the outer wall of the cylinder 401 jointly form a flow channel 405 having geometric characteristics defined by the parameters and used to make the target liquid move in a spiral strand shape; A plurality of air holes 403 are provided on the cylinder 401 , opening into the flow channel 405 and communicating with an air channel 406 provided in the cylinder 401 ; An output connector 1 is installed at the other end of the housing 2; An input connector 3, provided on the housing 2 and connected to the starting end of the spiral blade 402, for inputting the target liquid; The second input connector 5 is connected to the spiral generator 4 and is used to introduce compressed gas into the airway 406 .

[0010] Furthermore, it also includes a flange 404 formed at the outer end of the cylinder 401, the flange 404 is sealed and connected to the end face of the shell 2, and the input connector 2 5 is screwed on the flange 404 and communicated with the airway 406.

[0011] The present application also provides a gas-liquid mixture conveying method for conveying the gas-liquid mixture produced by the gas-liquid mixer. A main pipeline 6 connected to the output connector 1 is used to receive and output the gas-liquid mixture produced by the gas-liquid mixer, and the gas-liquid mixture is transported and sprayed on a designated area through a plurality of branch pipes connected to the main pipeline 6 and a two-phase flow fine water mist nozzle 9 connected to the end of the branch pipe.

[0012] Furthermore, the branch pipe includes a primary branch pipe 8 connected to the main pipe 6 and / or a secondary branch pipe 10 connected to the primary branch pipe 8 , and the two-phase flow fine water mist nozzle 9 is connected to the end of the primary branch pipe 8 or the secondary branch pipe 10 .

[0013] Furthermore, the main pipeline 6 and the primary branch pipe 8 or the primary branch pipe 8 and the secondary branch pipe 10 are connected via a spherical tee 7, and the spherical tee 7 is also used to make the gas-liquid mixture being transported collide in the spherical cavity inside the spherical tee 7 to form secondary mixing of the gas-liquid mixture.

[0014] Advantages of the present application: The gas-liquid mixing technology provided by the present application enables the target liquid to spontaneously form a strand-shaped spiral liquid flow consistent with the cross-sectional shape of the flow channel during its travel through a spiral flow channel with specific geometric features. Compressed gas is injected into the liquid flow in the flow channel through air holes opened on the cylinder body, so that the liquid flow cuts and breaks the compressed gas from the liquid phase interface during its travel to form bubbles dispersed in the liquid flow to achieve gas-liquid mixing, and it presents a stable turbulent state during transportation. It has the advantages of high gas-liquid mixing rate, good uniformity, and simple structure. And during the transportation of the gas-liquid mixture, an impact effect is generated on the gas-liquid mixture through the spherical cavity in the spherical three-way joint, so that the gas-liquid mixture is mixed again, which not only effectively prevents gas-liquid separation during transportation, but also increases the gas-liquid mixing rate and ensures the fire extinguishing effect, far superior to the prior art. Brief Description of the Drawings

[0015] Figure 1 is a three-dimensional schematic diagram of the structure of the gas-liquid mixer of the present application; Figure 2 is a connection schematic diagram of the gas-liquid mixer of the present application with the main pipe, branch pipe, spherical three-way joint and two-phase flow fine water mist nozzle. Detailed Embodiments

[0016] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0017] Please refer to Figure 1-2 , and now a gas-liquid mixing technology provided by an embodiment of the present application will be described. This gas-liquid mixing technology first enables the target liquid to form a strand-shaped spiral liquid flow with set parameters, and several strands of compressed gas are introduced into the liquid phase interface of the liquid flow with a set caliber. The liquid flow cuts and breaks the compressed gas from the liquid phase interface to form bubbles dispersed in the liquid flow to achieve gas-liquid mixing, that is, to form a gas-liquid two-phase flow.

[0018] In another embodiment of the present application, the spiral travel of the liquid flow is also used to evenly disperse the bubbles in the liquid flow. According to the above structure provided in this embodiment, the liquid flow constitutes a high-speed spiral rotation and forward state during its travel along the spiral path and the inside of the liquid flow presents a stable turbulent state. In this way, it plays a role in forcibly stirring and homogenizing the bubbles, making the gas-liquid mixing more uniform.

[0019] In another embodiment of the present application, the parameters at least include the inner diameter, outer diameter, pitch, cross-sectional shape size, and length for defining the spiral geometry of the liquid flow. It can be understood here that the above parameters can be flexibly calculated and determined by those skilled in the art according to the liquid flow rate required for the fire extinguishing area, and the present application does not make specific limitations.

[0020] In another embodiment of the present application, the direction of the compressed gas introduction is the normal direction of the liquid phase interface. In this way, the bubble diameter generated by the combined action of the liquid flow and the compressed gas is smaller than that generated by other introduction angles, the gas-liquid mixture is more uniform, and it is easier to maintain a stable gas-liquid mixture state.

[0021] In another embodiment of the present application, the compressed gas mixed into the liquid flow is also used to increase the flow rate of the liquid flow. The principle is that after the compressed gas enters the liquid flow, the internal pressure of the pipeline is increased, thereby increasing the flow rate of the gas-liquid mixture, so that the gas-liquid mixture can be ejected from the two-phase flow fine water mist nozzle at a higher speed, significantly enhancing the fire extinguishing effect.

[0022] In an embodiment of the present application, a gas-liquid mixer is further provided for implementing the above gas-liquid mixing technology. The gas-liquid mixer includes a housing 2, a spiral generator 4, air holes 403, an output joint 1, an input joint 1 3, and an input joint 2 5, wherein: The housing 2 has a hollow structure with openings at both ends; the spiral generator 4 is installed in the housing 2 and seals the opening at one end thereof; the spiral generator 4 includes a cylinder body 401 extending into the housing 2 and spiral vanes 402 provided on the outer wall of the cylinder body 401, and the outer circumferential surface of the spiral vanes 402 abuts against the inner wall of the housing 2; the spiral vanes 402, the inner wall of the housing 2, and the outer wall of the cylinder body 401 together form a flow channel 405 with geometric features defined by the above parameters and for making the target liquid flow in a strand-like spiral (i.e., the parameters of the flow channel 405 are inner diameter, outer diameter, pitch, cross-sectional shape size, and length, and in this embodiment, the cross-sectional shape of the flow channel 405 is a rectangle for illustration); a plurality of air holes 403 are provided on the cylinder body 401, opening into the flow channel 405 and communicating with an air passage 406 provided in the cylinder body 401. Here, the air holes 403 are evenly distributed on the cylinder body 401 within the area where the flow channel 405 is located, and the axis of the air hole 403 is the normal of the surface of the flow channel 405 at the position where the air hole 403 is located. Thus, the direction in which the compressed gas enters the flow channel 405 through the air hole 403 is the normal of the liquid phase interface of the liquid flow at the current position. Usually, the diameter of the air hole 403 is 0.1 - 3 mm, which can be flexibly set according to the diameter of the cylinder body 401 and the flow rate of the liquid flow. For example, it can be set to 0.15 mm, 0.5 mm, 2.5 mm; the output joint 1 is installed at the other end of the housing 2; the first input joint 3 is provided on the housing 2 and communicates with the starting end of the spiral vanes 402 for inputting the target liquid. Here, the first input joint 3 is usually connected to the main fire liquid supply pipeline; the second input joint 5 is connected to the spiral generator 4 for introducing compressed gas into the air passage 406. Usually, the second input joint 5 is connected to the output end of a high-pressure gas source such as a fire gas generator, an air compressor, or a high-pressure gas cylinder. The compressed gas can be air or an inert gas; here, the flow rate range of the compressed gas introduced into the air passage 406 is preferably 5 - 20 m / s, and the flow rate range of the target liquid input from the first input joint 3 is preferably 1 - 10 m / s. Thus, it is further ensured to obtain more bubbles and make the bubble diameter smaller, thereby obtaining a more uniform and fine gas-liquid two-phase mixture.

[0023] In the embodiment of the present application, the gas-liquid mixer further includes a flange 404 formed at the outer end of the cylinder body 401. The flange 404 is hermetically connected to the end face of the housing 2, and the second input joint 5 is screwed onto the flange 404 and communicates with the air passage 406. Thus, the spiral generator 4 is hermetically fixed to the housing 2 through fasteners passing through the flange 404, ensuring the reliability of the present gas-liquid mixer.

[0024] In the embodiment of the present application, a method for transporting a gas-liquid mixture is further provided for transporting the gas-liquid mixture generated by the above gas-liquid mixer, specifically as follows: The main pipeline 6 connected to the output joint 1 receives the gas-liquid mixture generated by the output gas-liquid mixer, and conveys and sprays the gas-liquid mixture to the designated area through a plurality of branch pipes connected to the main pipeline 6 and the two-phase flow fine water mist nozzles 9 connected to the ends of the branch pipes.

[0025] In another embodiment of the present application, the branch pipes include primary branch pipes 8 connected to the main pipeline 6 and / or secondary branch pipes 10 connected to the primary branch pipes 8. The two-phase flow fine water mist nozzles 9 are connected to the ends of the primary branch pipes 8 or the secondary branch pipes 10. In this way, the gas-liquid mixture can be flexibly conveyed and sprayed to the required area through the branch pipes.

[0026] In another embodiment of the present application, the main pipeline 6 and the primary branch pipes 8 or the primary branch pipes 8 and the secondary branch pipes 10 are all connected through spherical tees 7. The spherical tees 7 are also used to make the gas-liquid mixture in transportation impact inside the spherical cavity of the spherical tees 7 to form secondary mixing of the gas-liquid mixture. Please refer to Figure 2 , the input port of the spherical tee 7 is perpendicular to the axes of the two coaxially arranged output ports, that is, the input port faces the bottom of the spherical cavity of the spherical tee 7. In this way, when the gas-liquid mixture enters from the input port, it first impacts the bottom of the spherical cavity, forms an impact flow and returns to mix with the newly entered gas-liquid mixture at the input port, and then is output from the output port. In this way, secondary mixing of the gas-liquid mixture is formed to ensure the stability of the gas-liquid mixture during transportation and avoid gas-liquid separation; As a further preferred embodiment, the bending radius of the central axis of the elbow used at the turning connection of the main pipeline 6, the primary branch pipes 8 or the secondary branch pipes 10 is 1.5 times the nominal diameter of the corresponding main pipeline 6, primary branch pipes 8, and secondary branch pipes 10. In this way, the frictional resistance of the elbow pipe wall to the gas-liquid mixture, that is, the gas-liquid two-phase flow, is effectively reduced, further avoiding gas-liquid separation and ensuring the stable transportation of the gas-liquid two-phase flow.

[0027] In summary, the gas-liquid mixing technology provided by the present application enables the target liquid to spontaneously form a strand-shaped spiral liquid flow consistent with the cross-sectional shape of the flow channel 405 during the movement through the spiral flow channel 405 with specific geometric characteristics, and injects compressed gas into the liquid flow in the flow channel through the air holes 403 opened on the cylinder body 401, so that the liquid flow cuts and breaks the compressed gas from the liquid phase interface during the movement to form bubbles dispersed in the liquid flow to achieve gas-liquid mixing. And during the transportation process, the gas-liquid mixture is in a stable turbulent state, having the advantages of high gas-liquid mixing rate, good uniformity, and simple structure; And during the transportation process of the gas-liquid mixture, the impact effect on the gas-liquid mixture is generated by the spherical cavity in the spherical tee, so that the gas-liquid mixture is subjected to secondary mixing, which not only effectively prevents gas-liquid separation during transportation, but also increases the gas-liquid mixing rate, ensuring the fire extinguishing effect when the fire protection system is started, far superior to the prior art.

[0028] It should be noted that in this text, 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 actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0029] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "one end", "the other end", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application.

[0030] Meanwhile, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0031] Although the embodiments of the present application have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A gas-liquid mixing technology, characterized in that: Form a strand-shaped spiral liquid flow of the target liquid with set parameters, and introduce several strands of compressed gas into the liquid phase interface of the liquid flow at a set aperture, and cut and break the compressed gas from the liquid phase interface of the liquid flow to form bubbles dispersed in the liquid flow to achieve gas-liquid mixing.

2. The gas-liquid mixing technology according to claim 1, wherein: The spiral travel of the liquid flow is also used to evenly disperse the bubbles in the liquid flow.

3. The gas-liquid mixing technology according to claim 1, characterized in that: The parameters at least include an inner diameter, an outer diameter, a pitch, a cross-sectional shape size, and a length for defining the spiral geometry of the liquid flow.

4. The gas-liquid mixing technology according to claim 1, characterized in that: The direction of introducing the compressed gas is the normal direction of the liquid phase interface.

5. The gas-liquid mixing technology according to claim 1, characterized in that: The compressed gas mixed into the liquid flow is also used to increase the flow rate of the liquid flow.

6. A gas-liquid mixer for implementing the gas-liquid mixing technology described in any one of claims 1 to 5, characterized in that, Comprising: A housing (2), which is hollow and has openings at both ends; A spiral generator (4), which is installed on the housing (2) and plugs the opening at one end thereof; the spiral generator (4) includes a cylinder body (401) extending into the housing (2) and spiral blades (402) provided on the outer wall of the cylinder body (401), and the outer circumferential surface of the spiral blades (402) abuts against the inner wall of the housing (2); the spiral blades (402), the inner wall of the housing (2), and the outer wall of the cylinder body (401) jointly form a flow channel (405) having geometric features defined by the parameters and for making the target liquid travel in a strand-shaped spiral manner; Air holes (403), several of which are provided on the cylinder body (401), opening into the flow channel (405) and communicating with an air duct (406) provided in the cylinder body (401); An output joint (1), which is installed at the other end of the housing (2); An input joint one (3), which is provided on the housing (2) and communicates with the starting end of the spiral blades (402) for inputting the target liquid; An input joint two (5), which is connected to the spiral generator (4) for introducing compressed gas into the air duct (406).

7. The gas-liquid mixer according to claim 6, characterized in that: It further includes a flange (404) formed at the outer end of the cylinder body (401), the flange (404) is hermetically connected to the end face of the housing (2), and the input joint two (5) is screwed onto the flange (404) and communicates with the air duct (406).

8. A method for transporting a gas-liquid mixture, which is used to transport the gas-liquid mixture generated by the gas-liquid mixer according to claim 7, and is characterized in that: A main pipe (6) connected to the output joint (1) is used to receive and output the gas-liquid mixture generated by the gas-liquid mixer, and the gas-liquid mixture is transported and sprayed onto a specified area through a plurality of branch pipes connected to the main pipe (6) and a two-phase flow fine water mist nozzle (9) connected to the end of the branch pipe.

9. The gas-liquid mixture transportation method according to claim 8, characterized in that: The branch pipes include primary branch pipes (8) connected to the main pipe (6) and / or secondary branch pipes (10) connected to the primary branch pipes (8), and the two-phase flow fine water mist nozzle (9) is connected to the end of the primary branch pipe (8) or the secondary branch pipe (10).

10. The gas-liquid mixture transportation method according to claim 9, wherein: The main pipeline (6) and the first-level branch pipe (8) or the first-level branch pipe (8) and the second-level branch pipe (10) are connected through a spherical three-way joint (7), and the spherical three-way joint (7) is also used to make the gas-liquid mixture in transportation impact in the spherical cavity of the spherical three-way joint (7) to form secondary mixing of the gas-liquid mixture.

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