A liquid-gas jet device

Abstract

This invention belongs to the field of aerobic biochemical technology, specifically relating to a liquid-gas jet injector, including an air inlet pipe, a liquid inlet pipe, an air intake tank, a jet nozzle, a throat, a guide tube, and a mixer. A first channel is provided between the outlet of the nozzle and the first jet port of the air intake tank, allowing air to be drawn into the first jet port through the first channel. The throat is connected to the first jet port. A second channel is provided between the outlet of the throat and the guide tube to facilitate the intake of liquid flow to form a second gas-liquid mixture. The throat is used for the first gas-liquid mixing and transport, and the mixer is used for the mixing and transport of the second gas-liquid mixture. The gas-liquid mixture at the outlet of the mixer comes into contact with the liquid in the liquid pool, forming a third oxygen transfer. This solution achieves three-stage oxygen mass transfer between gas and liquid, overcoming the limitation of the optimal 1:1 mass transfer ratio of air to liquid in the throat; it ensures thorough mixing of gas and liquid, avoiding the drawbacks of localized high dissolved oxygen; and it improves the oxygen transfer efficiency between gas and liquid.

Description

Technical Field

[0001] This invention belongs to the field of aerobic biochemical technology, specifically relating to a liquid-gas jet device. Background Technology

[0002] Aerobic biological systems (such as aerobic bioreactors, aeration tanks, and aquaculture ponds) require the efficient dissolution of atmospheric oxygen in a liquid (water for aquaculture ponds, and feed liquid for aeration tanks and bioreactors; hereinafter collectively referred to as liquid) so that it can be utilized by organisms in the liquid. The oxygenation system is a key component of an aerobic biological system. Currently, there are many types of oxygenation systems, which can be broadly classified into three categories:

[0003] 1) Pore-based air distribution. These include perforated pipe type, toothed air distribution hood type, and microporous air distribution pipe (disc, plate) type. The characteristic of this type of equipment is that when air bubbles move in the liquid, the surface of the bubbles contacts the liquid, and oxygen in the bubbles is transferred to the liquid through the bubble walls. The oxygen transfer efficiency (the efficiency of transferring oxygen from the air dissolved in the liquid) is related to the residence time of the bubbles in the liquid and the size of the bubbles. The larger the pore size, the larger the bubbles, the greater the buoyancy, the shorter the residence time, and the lower the oxygen transfer efficiency. The smaller the pore size, the smaller the bubbles, but the resistance loss is greater, the energy consumption for air supply increases, and the pores are easily blocked, making maintenance difficult.

[0004] 2) Mechanical air entrainment. This includes surface impellers, rotating brushes, and submersible impellers. Its disadvantages are that surface impellers and rotating brushes have limited reoxygenation capacity and short gas-liquid contact time for oxygen transfer, affecting power efficiency; submersible impellers have limited self-aspiration capacity, while supply-type impellers have higher energy consumption and are prone to mechanical failures.

[0005] 3) Liquid-gas mixing type. This includes airlift jets (powered by air) and jet injectors (where the liquid entrains gas). Airlift jets have limited lifting capacity due to the small mass of air, resulting in poor mixing conditions. Currently, liquid jet injectors, powered by liquid, utilize the principle of a venturi tube. Air is drawn in during liquid injection, and the air mixes intensely with the liquid within the mixer. This method offers the best oxygen dissolution effect among the three types.

[0006] For liquid-gas ejectors, there are single-air intake type and two-air intake type. In the process of oxygen transfer between air and liquid, to maximize the dissolution of oxygen in the air into the liquid, theoretically, the oxygen dissolution capacity reaches its maximum when the volume ratio of air to liquid is 1:1. Excess oxygen in the air cannot be dissolved and transferred. However, when the volume ratio of the ejector's intake air volume to the working liquid volume is 1:1, the ejector's working efficiency is very low, and its energy efficiency is also relatively low.

[0007] Therefore, how to improve the oxygen transfer efficiency of jet injectors has always been a pressing problem that many engineers need to solve. Summary of the Invention

[0008] To address the problem of low oxygen transfer efficiency in air by existing jet injectors, this solution provides a liquid-gas jet injector.

[0009] The technical solution adopted in this invention is as follows:

[0010] A liquid-gas jet injector, comprising:

[0011] The air intake can is in contact with the air environment and has a first jet port at its bottom;

[0012] The outlet of the liquid inlet pipe is connected to a jet nozzle that is directly opposite the first jet port; a first channel is provided between the jet nozzle and the first jet port, and air in the air intake tank can be drawn into the first jet port through the first channel.

[0013] The throat is connected to the first jet port, and air and liquid mix in the throat to form a first gas-liquid mixture; the outlet of the throat is the nozzle of the first gas-liquid mixture; a second channel is provided between the outlet of the throat and the guide tube.

[0014] The guide tube has its inlet connected to the liquid environment and a second jet port inside it;

[0015] The mixer is connected to the second jet port, and the liquid outside the guide tube can be drawn into the mixer from the second channel; the first gas mixture flow and the liquid drawn into the second channel are mixed in the mixer to form a second gas-liquid mixture flow, which is then transported by the mixer.

[0016] As an alternative structure or supplementary design for the above-mentioned liquid-gas jet: an air inlet pipe is provided on the top or side wall of the air intake tank; an air intake chamber is provided inside the air intake tank; in use, the air intake tank is placed on the liquid surface and the guide tube is submerged below the liquid surface, or, all parts of the liquid-gas jet except the air inlet pipe are submerged below the liquid surface, and the air intake chamber is connected to the air environment through the air intake pipe.

[0017] As an alternative structure or supplementary design for the above-mentioned liquid-gas jet generator: one end of the liquid inlet pipe is connected to a water pump; the other end of the liquid inlet pipe passes through the tank wall of the air intake tank and extends into the air intake chamber to connect with the jet nozzle.

[0018] As an alternative structure or supplementary design for the aforementioned liquid-gas jet generator: the jet nozzle sprays vertically downwards.

[0019] As an alternative structure or supplementary design for the above-mentioned liquid-gas jet generator: the several nozzles provided on the jet nozzle head all spray vertically downwards.

[0020] As an alternative structure or supplementary design for the above-mentioned liquid-gas jet generator: the cross-sectional area of ​​the throat is 2 to 6 times the total cross-sectional area of ​​the jet nozzle; the cross-sectional area at the inlet of the mixer is 1.25 to 3 times the cross-sectional area at the outlet of the throat.

[0021] As an alternative structure or supplementary design for the above-mentioned liquid-gas jet generator: the guide tube is funnel-shaped with a larger top and a smaller bottom; the second jet outlet is located at the inner bottom of the guide tube.

[0022] As an alternative structure or supplementary design for the above-mentioned liquid-gas jet generator: the centerlines of the jet nozzle, air intake tank, throat tube and guide tube are all located on the same vertical line.

[0023] As an alternative structure or supplementary design for the above-mentioned liquid-gas jet, the mixer is in the form of a straight tube, a curved tube, or a conical disc.

[0024] As an alternative structure or supplementary design for the aforementioned liquid-gas jet generator, when the mixer is in the shape of a conical disc, the cavity inside the mixer is in the shape of a double-layered funnel, which is smaller at the top and larger at the bottom.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. This scheme adopts a two-stage jet structure. The first stage uses the jet at the nozzle to draw in outside air into the intake tank. Some of the oxygen in the air dissolves in the liquid under the action of high-speed turbulence in the throat. The second stage uses the jet at the guide tube to draw in the liquid in the liquid pool and realizes the liquid-gas-gas-liquid pattern in the mixer. This scheme realizes three oxygen mass transfers, which can be more conducive to improving the oxygen transfer efficiency of gas and liquid.

[0027] 2. The mixer in this design can fully mix gas and liquid, and the air is further refined into air droplets. The smaller the diameter of the bubbles, the better the oxygen transfer effect. At the same time, a variety of mixer structures are set up, and each mixer structure has its own focus, which can be applied to bioreactors, aerobic aeration that requires a flow propulsion, aerobic aeration that does not require a flow propulsion, and aquaculture ponds.

[0028] 3. Compared with existing jet injectors, the liquid-gas jet injector in this scheme breaks through the limitation of the optimal 1:1 oxygen transfer ratio of air and liquid in the throat; it does not use a diffuser, resulting in less kinetic energy loss in the gas-liquid mixture; during the first stage of injection, the inner and outer layers of the throat are gas and the inner layer is gas-liquid, forming a gas-filled gas-liquid pattern; during the second injection, a liquid-gas-gas-liquid pattern is formed, which is more conducive to oxygen transfer between gas and liquid; the gas and liquid are fully mixed in the mixer, and the air is further refined into gas droplets. The smaller the diameter of the bubbles, the better the oxygen transfer effect; the gas and liquid can be fully dispersed into the liquid pool, while expanding the service area of ​​the jet injector and avoiding the disadvantages of local high dissolved oxygen. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this scheme or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0030] Figure 1 This is a schematic diagram of the structure of a liquid-gas jet in this scheme;

[0031] Figure 2 This is a schematic diagram of the second type of liquid-gas jet in this scheme;

[0032] Figure 3 This is a schematic diagram of the third type of liquid-gas jet in this scheme;

[0033] Figure 4 This is a schematic diagram of the fourth type of liquid-gas jet in this scheme.

[0034] In the diagram: 1-Air inlet pipe; 2-Liquid inlet pipe; 3-Inhalation tank; 4-Jet nozzle; 5-Throat; 6-Guide tube; 7-Mixer. Detailed Implementation

[0035] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only a part of the embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this solution without creative effort are within the protection scope of this solution.

[0036] Example 1

[0037] like Figure 1 As shown, this embodiment designs a liquid-gas jet injector, including an air inlet pipe 1, a liquid inlet pipe 2, an air intake tank 3, a jet nozzle 4, a throat pipe 5, a guide tube 6, and a mixer 7.

[0038] The air inlet pipe 1 can be straight, inclined, or curved. When in use, the upper end of the air inlet pipe 1 extends to the surface of the liquid in the liquid pool and is connected to the air environment.

[0039] The suction tank 3 can adopt a cavity structure, which has a suction chamber inside. The air inlet pipe 1 is connected to the top or side wall of the suction tank 3. In use, the suction tank 3 can be located below the liquid surface or above the liquid surface. At the same time, the suction chamber inside the suction tank 3 is also connected to the air environment through the air inlet pipe 1, so that air can enter the suction tank 3 through the air inlet pipe 1. A first jet port is provided at the bottom of the suction tank 3, and the air inside the suction tank 3 is drawn in at the first jet port.

[0040] The inlet pipe 2 can be installed on the top or side wall of the suction tank 3. One end of the inlet pipe 2 is connected to a water pump, allowing liquid to be transported along the inlet pipe 2 under the drive of the water pump. The other end of the inlet pipe 2 passes into the suction tank 3 and is connected to a jet nozzle 4. The jet nozzle 4 points vertically downwards, pointing towards the center of the first jet port, so that the sprayed liquid can enter the first jet port. Under the kinetic energy of the liquid sprayed from the jet nozzle 4, the air in the suction tank 3 is drawn to the first jet port. A first channel is provided between the jet nozzle 4 and the first jet port, allowing air in the suction tank 3 to be drawn into the first jet port through the first channel.

[0041] The throat 5 is a tubular structure. The cross-sectional area of ​​the lumen at the inlet of the throat 5 is 2 to 6 times the total cross-sectional area of ​​the nozzle of the jet nozzle 4. The inlet at the upper end of the throat 5 is connected to the first jet port of the air intake tank 3. The first gas-liquid mixture will enter the throat 5. Under the action of high-speed turbulence in the throat 5, oxygen in the air will dissolve in the liquid, realizing the first oxygen transfer between the air and liquid flow. This process utilizes the momentum of the jet nozzle 4.

[0042] The guide tube 6 can adopt a funnel-shaped structure that is larger at the top and smaller at the bottom. The guide tube 6 is submerged below the liquid surface of the liquid pool. A second jet port is provided at the bottom of the guide tube 6, which is connected to the inlet at the upper end of the mixer 7. The lower end of the throat 5 extends into the guide tube 6 and is directly opposite the second jet port. A second channel is provided between the outlet at the lower end of the throat 5 and the guide tube, allowing liquid outside the guide tube 6 (i.e., liquid in the liquid pool) to be drawn into the second jet port through the second channel. The cross-sectional area at the outlet of the mixer 7 is 1.25 to 3 times the cross-sectional area at the outlet of the throat 5. When the first gas-liquid mixed flow is ejected from the lower end of the throat 5, it draws liquid from the liquid pool and mixes it into the mixer 7, forming a liquid-gas-gas-liquid mixture within the mixer 7, which is more conducive to oxygen transfer between the gas and liquid. Specifically, when the first gas-liquid mixture is ejected from the outlet of the throat 5, the liquid in the liquid pool is drawn into the guide tube 6. The liquid flow drawn in this time, together with the original liquid flow and air flow in the throat 5, can enter the mixer 7.

[0043] Mixer 7 adopts a straight pipe structure, such as Figure 1 As shown, the upper end of the mixer 7 is connected to the second jet port. The first gas-liquid mixture and the liquid drawn in at the second channel are mixed in the mixer 7 to form a second gas-liquid mixture, which is then transported and sprayed by the mixer 7. It should be noted that, through practice, the liquid-gas jet device in this embodiment is applicable to aerobic biochemical systems such as aerobic bioreactors, aeration tanks, and aquaculture ponds, and is especially suitable for aerobic bioreactors.

[0044] Example 2

[0045] like Figure 2 As shown, this embodiment designs a liquid-gas jet injector, including an air inlet pipe 1, a liquid inlet pipe 2, an air intake tank 3, a jet nozzle 4, a throat pipe 5, a guide tube 6, and a mixer 7.

[0046] The air inlet pipe 1 can be straight, inclined, or curved, and is used to extend to the surface of the liquid pool to connect with the air environment.

[0047] The suction canister 3 has a cavity structure, containing a suction chamber. An air inlet pipe 1 is connected to the top or side wall of the suction canister 3. The suction chamber inside the suction canister 3 is connected to the air environment through the air inlet pipe 1. A first jet port is provided at the bottom of the suction canister 3 to achieve liquid entrainment of air at this first jet port.

[0048] One end of the inlet pipe 2 is connected to a water pump, and the other end passes through the air intake tank 3 and is connected to a jet nozzle 4. The jet nozzle 4 points towards the first jet port, and the liquid stream ejected by the jet nozzle 4 draws air into the first jet port. A first channel is provided between the jet nozzle 4 and the first jet port, and air in the air intake tank 3 can be drawn into the first jet port through the first channel.

[0049] The throat tube 5 is connected to the bottom of the first channel, and the upper end of the throat tube 5 is connected to the first jet port of the air intake tank 3. The first gas-liquid mixture enters the throat tube 5, and the air and liquid flow are mixed under the action of high-speed turbulence in the throat tube 5. The oxygen in the air will dissolve in the liquid.

[0050] A second jet port is provided at the bottom inner side of the guide tube 6, which is submerged below the liquid surface of the liquid pool. The lower end of the throat 5 extends to the bottom inner side of the guide tube 6 and is directly opposite the second jet port. A second channel is provided between the outlet at the lower end of the throat 5 and the guide tube, and the liquid outside the guide tube 6 can be drawn into the second jet port through the second channel. During the process of the first gas-liquid mixture being ejected from the lower end of the throat 5, it can draw liquid from the liquid pool, forming a liquid-gas-gas-liquid mixed pattern, which is more conducive to the oxygen transfer of gas and liquid.

[0051] Mixer 7 adopts a bent tube structure, such as Figure 2 As shown, the upper end of the mixer 7 is connected to the second jet port. The cross-sectional area at the inlet of the mixer 7 is 1.25 to 3 times the cross-sectional area at the outlet of the throat 5. The first gas mixture flow and the liquid drawn in at the second channel are mixed in the mixer 7 to form a second gas-liquid mixture flow, which is then transported and sprayed by the mixer 7. It should be noted that, through practice, the liquid-gas jet injector in this embodiment is applicable to aerobic biochemical systems such as aerobic bioreactors, aeration tanks, and aquaculture ponds, and has better results when applied to aerobic aeration tanks that require a propulsive flow.

[0052] Example 3

[0053] like Figure 3 As shown, this embodiment designs a liquid-gas jet injector, including an air inlet pipe 1, a liquid inlet pipe 2, an air intake tank 3, a jet nozzle 4, a throat 5, a guide tube 6, and a mixer 7. The jet nozzle 4, air intake tank 3, throat 5, and guide tube 6 at the outlet of the water inlet pipe 2 are all located on the same vertical line.

[0054] The air intake canister 3 is connected to the air environment through an air inlet pipe, and a first jet port is provided at its bottom; an air inlet pipe 1 is provided on the top or side wall of the air intake canister 3; an air intake chamber is provided inside the air intake canister 3; when in use, when the air intake canister 3 is submerged below the liquid surface, the air intake chamber is connected to the air environment through the air inlet pipe 1.

[0055] The jet nozzle 4 connected to the outlet of the inlet pipe 2 is directly opposite the first jet port. A first channel is provided between the jet nozzle 4 and the first jet port, allowing air from the suction tank 3 to be drawn into the first jet port through the first channel. One end of the inlet pipe 2 is connected to a water pump; the other end of the inlet pipe 2 passes through the tank wall of the suction tank 3 and extends into the suction chamber. The outlet of the inlet pipe 2 is connected to the jet nozzle 4, which points vertically downwards. The jet nozzle 4 has several nozzles; each nozzle sprays water vertically downwards from the water surface.

[0056] The inlet of the guide tube 6 is connected to the liquid environment such as the liquid pool, and a second jet port is provided at its bottom; the guide tube 6 is funnel-shaped with a larger top and a smaller bottom; the second jet port is located at the inner bottom of the guide tube 6.

[0057] The throat 5 is connected to the first jet port, and air and liquid are mixed in the throat 5 to form a first gas-liquid mixture flow; the outlet of the throat 5 is directly opposite the second jet port; a second channel is provided between the outlet of the throat 5 and the guide tube, and liquid outside the guide tube 6 (i.e., liquid in the liquid pool) can be drawn into the second jet port from the second channel.

[0058] The mixer 7 is conical in shape, and the cavity inside the mixer 7 is a double-layered funnel or dome shape, wider at the bottom and narrower at the top. The upper end of the mixer 7 is connected to the second jet port. The first gas mixture flow and the liquid drawn in at the second channel are mixed in the mixer 7 to form a second gas-liquid mixture flow, which is then transported and sprayed by the mixer 7. It should be noted that, through practice, the liquid-gas jet injector in this embodiment can be applied in aerobic bioreactors, aeration tanks, aquaculture ponds, and other aerobic biochemical systems. Moreover, it has better performance when applied to aerobic aeration and aquaculture ponds where a propulsion effect is not required.

[0059] Example 4

[0060] like Figure 4As shown, this embodiment designs a liquid-gas jet injector, including an air inlet pipe 1, a liquid inlet pipe 2, an air intake tank 3, a jet nozzle 4, a throat pipe 5, a guide tube 6, and a mixer 7.

[0061] The air inlet pipe 1 can be an inclined pipe or a bent pipe structure. The upper end of the air inlet pipe 1 extends to the surface of the liquid in the liquid pool and is connected to the air environment. The lower end of the air inlet pipe 1 is connected to the side wall of the air intake tank 3.

[0062] The suction tank 3 has a hollow structure with a suction chamber inside. The air inlet pipe 1 is connected to the side wall of the suction tank 3. During use, the guide tube is submerged below the liquid surface of the liquid pool. Simultaneously, the suction chamber inside the suction tank 3 is connected to the air environment through the air inlet pipe 1, allowing air to enter the suction tank 3 through the air inlet pipe 1. A first jet port is provided at the bottom of the suction tank 3, where air entrainment is achieved.

[0063] The inlet pipe 2 can be installed at the top of the suction tank 3. One end of the inlet pipe 2 is connected to a water pump, allowing liquid to be transported along the inlet pipe 2 under the drive of the water pump. The other end of the inlet pipe 2 extends vertically to the first jet port at the bottom of the suction tank 3. The other end of the inlet pipe 2 is the outlet of the inlet pipe 2, which is connected to a jet nozzle 4. The jet nozzle 4 points vertically downward (perpendicular to the water surface) and is centered on the first jet port, allowing the liquid flow ejected by the jet nozzle 4 to enter the first jet port and draw air from the suction chamber to the first jet port. A first channel is provided between the jet nozzle 4 and the first jet port, through which air is drawn into the first jet port.

[0064] Furthermore, in this embodiment, the connection structure and cooperation method between the throat 5, the guide tube 6 and the mixer 7 are the same as those in Embodiment 1, Embodiment 2 or Embodiment 3, and will not be described in detail here.

[0065] In the mixer 7 described in Examples 1 to 4, under the action of high-speed turbulent kinetic energy, the dissolved oxygen in the throat 5 is diluted by the liquid flow drawn in from the second channel, and some undissolved oxygen continues to transfer oxygen with the liquid drawn in by the mixer 7; the remaining undissolved air in the liquid flow forms aerosols with the liquid; when the aerosols are ejected from the outlet of the mixer 7 with the liquid flow, the ejected aerosols come into full contact with the liquid again in the liquid pool, and the remaining oxygen in the air will further transfer oxygen with the liquid. The oxygen molecules in the air drawn in from the outside undergo three oxygen transfer processes with the liquid inside and outside the ejector, with the oxygen transfer locations being inside the throat 5, inside the mixer 7, and in the liquid pool outside the gas-liquid ejector, respectively, which greatly improves the oxygen transfer efficiency. According to the inventor's simulation calculations, the oxygen transfer efficiency can reach up to 7 kg / kW.h.

[0066] The above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation; it is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom remain within the scope of this technology.

Claims

1. A liquid-gas jet injector, characterized in that: include: The air intake canister (3) is connected to the air environment and has a first jet port at its bottom; The outlet of the liquid inlet pipe (2) is connected to a jet nozzle (4) which is directly opposite the first jet port; a first channel is provided between the jet nozzle (4) and the first jet port, and the air in the suction tank (3) can be drawn into the first jet port through the first channel; The throat (5) is connected to the first jet port, and air and liquid are mixed in the throat (5) to form a first gas-liquid mixture flow; the outlet of the throat (5) is the nozzle of the first gas-liquid mixture flow; a second channel is provided between the outlet of the throat (5) and the guide tube. The guide tube (6) has an inlet that is connected to the liquid environment and a second jet port is provided inside it; the guide tube (6) is funnel-shaped with a larger top and a smaller bottom; the second jet port is located at the bottom of the guide tube (6); The mixer (7) is connected to the second jet port, and the liquid outside the guide tube (6) can be drawn into the mixer from the second channel; the first gas mixture flow and the liquid drawn into the second channel are mixed in the mixer (7) to form a second gas-liquid mixture flow, which is then transported by the mixer (7).

2. The liquid-gas jet ejector according to claim 1, characterized in that: An air inlet pipe (1) is provided on the top or side wall of the air inlet tank (3); an air inlet chamber is provided inside the air inlet tank (3); when in use, the air inlet tank is placed on the liquid surface and the guide tube is submerged below the liquid surface, or, all parts of the liquid-gas jet except the air inlet pipe are submerged below the liquid surface, and the air inlet chamber is connected to the air environment through the air inlet pipe (1).

3. The liquid-gas jet ejector according to claim 2, characterized in that: One end of the inlet pipe (2) is connected to the water pump; the other end of the inlet pipe (2) passes through the tank wall of the air intake tank (3) and extends into the air intake chamber to connect with the jet nozzle.

4. The liquid-gas jet ejector according to claim 3, characterized in that: The jet nozzle (4) sprays vertically downwards.

5. The liquid-gas jet ejector according to claim 4, characterized in that: The jet nozzle (4) has several nozzles that spray vertically downwards.

6. The liquid-gas jet ejector according to claim 5, characterized in that: The cross-sectional area of ​​the throat (5) is 2 to 6 times the total cross-sectional area of ​​the nozzle of the jet nozzle (4); the cross-sectional area at the inlet of the mixer (7) is 1.25 to 3 times the cross-sectional area at the outlet of the throat (5).

7. The liquid-gas jet ejector according to claim 1, characterized in that: The centerlines of the jet nozzle (4), the air intake (3), the throat (5), and the guide tube (6) are all located on the same vertical line.

8. The liquid-gas jet ejector according to any one of claims 1-7, characterized in that: The mixer (7) is in the shape of a straight tube, a curved tube, or a conical disc.

9. The liquid-gas jet ejector according to claim 8, characterized in that: When the mixer (7) is cone-shaped, the cavity inside the mixer (7) is a double-layered funnel shape with a smaller top and a larger bottom.

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