Intelligent irrigation and fertilization machine

Abstract

This utility model relates to an intelligent irrigation and fertilization machine, comprising a jet premixing device, a centrifugal mixing device, a microbubble mixing device, an irrigation pipeline, and a fertilizer storage tank. The first inlet of the jet premixing device is connected to a water source, the second inlet of the jet premixing device is connected to the fertilizer storage tank, the outlet of the jet premixing device is connected to the inlet of the centrifugal mixing device, the outlet of the centrifugal mixing device is connected to the inlet of the microbubble mixing device, and the outlet of the microbubble mixing device is connected to the irrigation pipeline. Its beneficial effect is that the intelligent irrigation and fertilization machine of this utility model first completes basic dilution through the jet premixing device, then enhances particle collision through the centrifugal mixing device, and finally achieves molecular dispersion mixing through the microbubble mixing device, thereby significantly improving the mixing uniformity of the fertilizer mother liquor and the water flow.

Description

Technical Field

[0001] This utility model relates to the field of irrigation and fertilization equipment technology, and in particular to an intelligent irrigation and fertilization machine. Background Technology

[0002] Intelligent irrigation and fertilization machines are modern agricultural equipment that combine irrigation and fertilization functions. They are suitable for large-scale farmland planting, such as grain crops like wheat, corn, and rice, as well as cash crops like cotton, vegetables, and fruits. They can precisely irrigate and fertilize according to different crop growth stages and fertilizer requirements.

[0003] Chinese patent document CN216017776U discloses an intelligent irrigation and fertilization machine, including a base plate and four movable casters mounted on the base plate. A push plate is fixedly installed on one side of the base plate. A fertilizer concentrate tank, a water storage tank, and a fertilizer proportioning tank are fixedly installed on the base plate. The fertilizer concentrate tank and the water storage tank are both connected to the fertilizer proportioning tank through connecting pipes. A liquid outlet pipe is connected to the fertilizer proportioning tank. A flow meter, a solenoid valve, and a first water pump are installed on the connecting pipe. A second water pump is installed on the liquid outlet pipe. The first water pump is connected to a first power mechanism, and the second water pump is connected to a second power mechanism. The flow meter, solenoid valve, first power mechanism, and second power mechanism are all electrically connected to a PLC controller. The liquid outlet pipe is connected to multiple nozzles through a diversion valve. A rotary lifting assembly is installed on the base plate, and the diversion valve is fixedly connected to the rotary lifting assembly. The defects and shortcomings of this intelligent irrigation and fertilization machine are as follows: the machine mixes fertilizers by adding water or fertilizer concentrate to the fertilizer mixing tank, which cannot fully and evenly mix fertilizers and irrigation water, and may result in excessively high local fertilizer concentrations, which may corrode pipes or burn crop roots.

[0004] Therefore, there is an urgent need to provide a smart irrigation and fertilization machine that can mix fertilizer and irrigation water more evenly. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, this utility model provides an intelligent irrigation and fertilization machine, which solves the technical problem that the existing intelligent irrigation and fertilization machines cannot evenly mix fertilizer and irrigation water, resulting in excessively high local fertilizer concentration, corrosion of pipes or burning of crop roots.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] This utility model provides an intelligent irrigation and fertilization machine, including a jet premixing device, a centrifugal mixing device, a microbubble mixing device, an irrigation pipeline, and a fertilizer storage tank;

[0010] The first inlet of the jet premixing device is connected to a water source, the second inlet of the jet premixing device is connected to a fertilizer storage tank, the outlet of the jet premixing device is connected to the inlet of a centrifugal mixing device, the outlet of the centrifugal mixing device is connected to the inlet of a microbubble mixing device, and the outlet of the microbubble mixing device is connected to an irrigation pipeline.

[0011] Optionally, it also includes an operation control cabinet, which is connected to the jet premixing device and the microbubble mixing device respectively.

[0012] Optionally, the jet premixing device includes a booster pump and a dual-fluid nozzle;

[0013] The inner layer of the front section of the dual-fluid nozzle is the main water flow channel, and the outer layer of the front section of the dual-fluid nozzle is the fertilizer solution channel. The main water flow channel and the fertilizer solution channel form a coaxial dual channel. The interior of the rear section of the dual-fluid nozzle has a nozzle outlet, and the outlets of the main water flow channel and the fertilizer solution channel are both connected to the nozzle outlet.

[0014] The operation control cabinet is connected to the booster pump. The inlet of the booster pump is connected to the water source, and the outlet of the booster pump is connected to the inlet of the main water flow channel. The fertilizer storage tank is connected to the inlet of the fertilizer solution channel, and the nozzle outlet is connected to the inlet of the centrifugal mixing device.

[0015] Optionally, the number of dual-fluid nozzles is two or more, and the two or more dual-fluid nozzles are arranged in series.

[0016] Optionally, a filter screen is installed on the pipeline between the fertilizer storage tank and the dual-fluid nozzle.

[0017] Optionally, the microbubble mixing device includes an aeration chamber, an air pump, and an aeration disc;

[0018] The liquid outlet of the centrifugal mixing device is connected to the liquid inlet of the aeration chamber, and the liquid outlet of the aeration chamber is connected to the irrigation pipeline.

[0019] The operation control cabinet is connected to the air pump, and the air outlet of the air pump is connected to the air inlet of the aeration disc, which is set on the bottom wall inside the aeration chamber.

[0020] Optionally, a turbidity sensor is installed on the inner wall of the aeration chamber, and the operation control cabinet is connected to the turbidity sensor.

[0021] Optionally, the centrifugal mixing device includes a centrifugal vortex chamber;

[0022] The upper part of the centrifugal vortex cavity is a cylindrical structure, and the lower part of the centrifugal vortex cavity is a conical structure. A tangential inlet is provided on the circumferential surface of the cylindrical structure, and an axial outlet is provided at the bottom of the conical structure. Multiple guide plates are provided at intervals on the inner sidewall of the centrifugal vortex cavity.

[0023] The tangential inlet connects to the liquid outlet of the jet premixing device, and the axial outlet connects to the liquid inlet of the microbubble mixing device. The guide plate is used to block the rotating mixture in the centrifugal vortex chamber.

[0024] Optionally, two symmetrically arranged tangential inlets are provided on the circumferential surface of the cylindrical structure, and the liquid outlet of the jet premixing device is divided into two branches, which are respectively connected to the two tangential inlets.

[0025] (III) Beneficial Effects

[0026] The beneficial effects of this invention are as follows: The intelligent irrigation and fertilization machine of this invention includes a jet premixing device, a centrifugal mixing device, a microbubble mixing device, an irrigation pipeline, and a fertilizer storage tank. The first inlet of the jet premixing device is connected to a water source, the second inlet of the jet premixing device is connected to the fertilizer storage tank, the outlet of the jet premixing device is connected to the inlet of the centrifugal mixing device, the outlet of the centrifugal mixing device is connected to the inlet of the microbubble mixing device, and the outlet of the microbubble mixing device is connected to the irrigation pipeline. Compared with existing intelligent irrigation and fertilization machines, this invention uses the jet premixing device to perform primary jet mixing of water and fertilizer mother liquor, followed by secondary centrifugal mixing of water and fertilizer mother liquor using the centrifugal mixing device, and finally injects microbubbles into the mixture of fertilizer mother liquor and water using the microbubble mixing device. This utilizes the shear force at the gas-liquid interface to break up particles, resulting in tertiary fine mixing, thereby significantly improving the mixing uniformity of fertilizer mother liquor and water. Attached Figure Description

[0027] Figure 1 This is a schematic diagram illustrating the structural principle of Embodiment 1 of the intelligent irrigation and fertilization machine of this utility model;

[0028] Figure 2 for Figure 1 A schematic diagram of the jet premixing device in the middle;

[0029] Figure 3 for Figure 2 A schematic diagram of the internal structure of the dual-fluid nozzle in the diagram;

[0030] Figure 4 for Figure 1 A schematic diagram of the centrifugal mixing device in the diagram;

[0031] Figure 5 for Figure 4 A top view of the centrifugal mixing device in the diagram;

[0032] Figure 6 for Figure 1 A schematic diagram of the microbubble mixing device in the diagram;

[0033] Figure 7This is a schematic diagram of the jet premixing device in Embodiment 2 of the intelligent irrigation and fertilization machine of this utility model;

[0034] Figure 8 This is a top view schematic diagram of the centrifugal mixing device in Embodiment 2 of the intelligent irrigation and fertilization machine of this utility model.

[0035] [Explanation of Labels in the Attached Image]

[0036] 1: Jet premixing device; 11: Booster pump; 12: Dual-fluid nozzle; 121: Main water flow channel; 122: Fertilizer solution channel; 123: Nozzle outlet; 13: Filter screen;

[0037] 2: Centrifugal mixing device; 21: Centrifugal vortex chamber; 22: Guide plate; 23: Tangential inlet; 24: Axial outlet;

[0038] 3: Microbubble mixing device; 31: Aeration chamber; 32: Air pump; 33: Aeration disc; 34: Turbidity sensor;

[0039] 4: Operation control cabinet; 5: Water source; 6: Irrigation pipeline; 7: Fertilizer storage box. Detailed Implementation

[0040] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] Example 1:

[0042] Reference Figure 1 This embodiment provides an intelligent irrigation and fertilization machine, including a jet premixing device 1, a centrifugal mixing device 2, a microbubble mixing device 3, an irrigation pipeline 6, and a fertilizer storage tank 7.

[0043] The first inlet of the jet premixing device 1 is connected to the water source 5, and the second inlet of the jet premixing device 1 is connected to the fertilizer storage tank 7, which is used to store fertilizer mother liquor. The outlet of the jet premixing device 1 is connected to the inlet of the centrifugal mixing device 2, the outlet of the centrifugal mixing device 2 is connected to the inlet of the microbubble mixing device 3, and the outlet of the microbubble mixing device 3 is connected to the irrigation pipeline 6.

[0044] The intelligent irrigation and fertilization machine of this embodiment, by employing a jet premixing device 1, a centrifugal mixing device 2, and a microbubble mixing device 3, significantly improves the mixing uniformity of the fertilizer mother liquor compared to existing intelligent irrigation and fertilization machines. This is achieved by: jet premixing device 1 performing primary jet mixing of water and fertilizer mother liquor; centrifugal mixing device 2 using centrifugal force for secondary enhanced mixing; and microbubble mixing device 3 injecting microbubbles into the mixture to break up particles using gas-liquid interface shear force, thus performing tertiary fine mixing. It should be noted that the fertilizer mother liquor can be a suspension containing undissolved fertilizer particles.

[0045] Preferably, the intelligent irrigation and fertilization machine of this embodiment also includes an operation control cabinet 4, which is connected to the jet premixing device 1 and the microbubble mixing device 3 respectively, and is used to control the start and stop of the jet premixing device 1 and the microbubble mixing device 3.

[0046] Please see Figure 2 and Figure 3 The jet premixing device 1 in this embodiment includes a booster pump 11 and a dual-fluid nozzle 12. The inner layer of the front section of the dual-fluid nozzle 12 is a main water flow channel 121, and the outer layer of the front section of the dual-fluid nozzle 12 is a fertilizer solution channel 122. The main water flow channel 121 and the fertilizer solution channel 122 form a coaxial dual channel. The interior of the rear section of the dual-fluid nozzle 12 has a nozzle outlet 123, and the outlets of the main water flow channel 121 and the fertilizer solution channel 122 are both connected to the nozzle outlet 123.

[0047] The operation control cabinet 4 is connected to the booster pump 11. The inlet of the booster pump 11 is connected to the water source 5. The outlet of the booster pump 11 is connected to the inlet of the main water flow channel 121. The fertilizer storage tank 7 is connected to the inlet of the fertilizer liquid channel 122. The nozzle outlet 123 of the dual-fluid nozzle 12 is connected to the inlet of the centrifugal mixing device 2.

[0048] It should be noted that the dual-fluid nozzle 12 is an existing device available on the market. For example, the dual-fluid nozzle can be a Venturi injector, which draws in and mixes fertilizer mother liquor based on the Bernoulli effect. Specifically, the booster pump 11 introduces a high-speed water flow into the main water flow channel 121 inside the dual-fluid nozzle 12. The high-speed water flow creates a low-pressure zone at the nozzle throat, drawing in the fertilizer mother liquor from the outer layer. Then, the main water flow and the fertilizer mother liquor collide at the nozzle outlet 123, undergoing initial crushing and mixing.

[0049] Furthermore, a first flow meter is installed on the pipeline between the booster pump 11 and the dual-fluid nozzle 12, and a second flow meter and an on / off solenoid valve are installed on the pipeline between the fertilizer storage tank 7 and the dual-fluid nozzle 12. The operation control cabinet 4 is electrically connected to the first flow meter, the second flow meter, and the on / off solenoid valve, respectively. In actual use, the operation control cabinet 4 controls the booster pump 11 to supply water to the dual-fluid nozzle 12. The first flow meter monitors the water flow rate and sends the flow rate data to the operation control cabinet 4. The operation control cabinet 4 controls the on / off solenoid valve to open, delivering fertilizer mother liquor into the dual-fluid nozzle 12, and monitors the flow rate of the fertilizer mother liquor through the second flow meter. When the flow rate of the fertilizer mother liquor reaches the set amount, the operation control cabinet 4 controls the on / off solenoid valve to disconnect the pipeline, thereby achieving the effect of controlling the ratio of water to fertilizer mother liquor. Furthermore, a filter screen 13 is installed on the pipeline between the fertilizer storage tank 7 and the dual-fluid nozzle 12. The purpose of installing the filter screen 13 is to intercept large particles in the fertilizer mother liquor and prevent them from clogging the dual-fluid nozzle 12. Preferably, filter screen 13 is a 120-mesh stainless steel filter screen.

[0050] Please see Figure 4 and Figure 5 The centrifugal mixing device 2 in this embodiment includes a centrifugal vortex chamber 21. The upper part of the centrifugal vortex chamber 21 is a cylindrical structure, and the lower part of the centrifugal vortex chamber 21 is a conical structure. A tangential inlet 23 is provided on the circumferential surface of the cylindrical structure, and the tangential inlet 23 is connected to the liquid outlet end of the jet premixing device 1. An axial outlet 24 is provided at the bottom of the conical structure, and the axial outlet 24 is connected to the liquid inlet end of the microbubble mixing device 3.

[0051] Multiple guide plates 22 are spaced apart on the inner wall of the centrifugal vortex cavity 21, and the angle α between the length direction of the guide plate 22 and the axis of the centrifugal vortex cavity 21 is 30°-60°.

[0052] During operation, the water stream and fertilizer mother liquor mixture output from the jet premixing device 1 are tangentially injected into the centrifugal vortex chamber 21, forming a rotating vortex. The mixture rotates within the centrifugal vortex chamber 21, and density differences drive particle stratification. Simultaneously, the high-speed rotating mixture collides with the guide plate 22, generating intense shearing and vortexing, further mixing the particles and water in the incompletely mixed fertilizer mother liquor. Finally, the mixture flows out from the axial outlet 24 of the centrifugal vortex chamber 21.

[0053] Please see Figure 6 The microbubble mixing device 3 in this embodiment includes an aeration chamber 31, an air pump 32, and an aeration disc 33.

[0054] The liquid outlet of the centrifugal mixing device 2 is connected to the liquid inlet of the aeration chamber 31, and the liquid outlet of the aeration chamber 31 is connected to the irrigation pipeline 6. The operation control cabinet 4 is connected to the air pump 32, and the air outlet of the air pump 32 is connected to the air inlet of the aeration disc 33, which is installed on the bottom wall inside the aeration chamber 31.

[0055] During operation, the operation control cabinet 4 controls the start and stop of the air pump 32 and the gas flow rate. The air pump 32 provides high-speed gas to the aeration disc 33, which converts the high-speed gas into microbubbles with a diameter of <50μm. A high-energy interface is formed on the surface of the microbubbles, which promotes the dispersion and dissolution of particles in the fertilizer mother liquor. This further improves the mixing uniformity of the fertilizer mother liquor and the water flow.

[0056] Furthermore, a turbidity sensor 34 is installed on the inner wall of the aeration chamber 31, and the operation control cabinet 4 is connected to the turbidity sensor 34. The purpose of installing the turbidity sensor 34 is to detect the degree of turbidity of the mixed liquid in the aeration chamber 31 in real time. The operation control cabinet 4 controls the start and stop of the air pump 32 and its power according to the degree of turbidity of the mixed liquid, thereby saving 30%-50% of energy.

[0057] The intelligent irrigation and fertilization machine of this embodiment has three major advantages: First, progressive stage mixing: the jet premixing device 1 completes the basic dilution, the centrifugal mixing device 2 enhances particle collision, and the microbubble mixing device 3 achieves molecular dispersion. Second, energy consumption is tiered: high-pressure energy consumption is concentrated in the jet stage, while the subsequent stages employ low-energy passive and semi-active mixing. Third, fault tolerance and complementarity: when the preceding stage device fails, the subsequent stage device can partially compensate for the mixing effect. For example, when the jet premixing device 1 fails, the centrifugal mixing device 2 and the microbubble mixing device 3 can still improve the uniformity by 10%-15%.

[0058] Example 2:

[0059] Reference Figure 7 and Figure 8 This embodiment provides another intelligent irrigation and fertilization machine. Unlike embodiment 1, this embodiment uses two or more dual-fluid nozzles 12, which are connected in series. This arrangement aims to achieve progressively refined mixing, thereby significantly improving the mixing efficiency of the fertilizer mother liquor and water flow, and enhancing the system's adaptability.

[0060] Furthermore, two symmetrically arranged tangential inlets 23 are provided on the circumferential surface of the cylindrical structure of the centrifugal vortex cavity 21. The liquid outlet of the jet premixing device 1 is divided into two branches, which are respectively connected to the two tangential inlets 23. The purpose of this arrangement is to allow the mixed liquid to be symmetrically injected into the centrifugal vortex cavity 21 from both sides, forming opposing vortices, thereby increasing the collision frequency and further promoting the mixing of fertilizer mother liquor and water.

[0061] The remaining parts that are the same as in Example 1 will not be repeated here.

[0062] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0063] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0064] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0065] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An intelligent irrigation and fertilization machine, characterized in that: It includes a jet premixing device (1), a centrifugal mixing device (2), a microbubble mixing device (3), an irrigation pipeline (6), and a fertilizer storage tank (7). The first inlet of the jet premixing device (1) is connected to the water source (5), the second inlet of the jet premixing device (1) is connected to the fertilizer storage tank (7), the outlet of the jet premixing device (1) is connected to the inlet of the centrifugal mixing device (2), the outlet of the centrifugal mixing device (2) is connected to the inlet of the microbubble mixing device (3), and the outlet of the microbubble mixing device (3) is connected to the irrigation pipeline (6).

2. The intelligent irrigation and fertilization machine as described in claim 1, characterized in that: It also includes an operation control cabinet (4), which is connected to the jet premixing device (1) and the microbubble mixing device (3) respectively.

3. The intelligent irrigation and fertilization machine as described in claim 2, characterized in that: The jet premixing device (1) includes a booster pump (11) and a dual-fluid nozzle (12). The inner layer of the front section of the dual-fluid nozzle (12) is the main water flow channel (121), and the outer layer of the front section of the dual-fluid nozzle (12) is the fertilizer solution channel (122). The main water flow channel (121) and the fertilizer solution channel (122) form a coaxial dual channel. The interior of the rear section of the dual-fluid nozzle (12) has a nozzle outlet (123). The outlets of the main water flow channel (121) and the fertilizer solution channel (122) are both connected to the nozzle outlet (123). The operation control cabinet (4) is connected to the booster pump (11). The inlet of the booster pump (11) is connected to the water source (5). The outlet of the booster pump (11) is connected to the inlet of the main water flow channel (121). The fertilizer storage tank (7) is connected to the inlet of the fertilizer channel (122). The nozzle outlet (123) is connected to the inlet of the centrifugal mixing device (2).

4. The intelligent irrigation and fertilization machine as described in claim 3, characterized in that: A first flow meter is installed on the pipeline between the booster pump (11) and the dual-fluid nozzle (12). A second flow meter and an on / off solenoid valve are installed on the pipeline between the fertilizer storage tank (7) and the dual-fluid nozzle (12). The operation control cabinet (4) is electrically connected to the first flow meter, the second flow meter and the on / off solenoid valve respectively.

5. The intelligent irrigation and fertilization machine as described in claim 3, characterized in that: The number of dual-fluid nozzles (12) is more than two, and the two or more dual-fluid nozzles (12) are arranged in series.

6. The intelligent irrigation and fertilization machine as described in claim 3, characterized in that: A filter screen (13) is installed on the pipeline between the fertilizer storage tank (7) and the dual-fluid nozzle (12).

7. The intelligent irrigation and fertilization machine as described in claim 2, characterized in that: The microbubble mixing device (3) includes an aeration chamber (31), an air pump (32), and an aeration disc (33). The liquid outlet of the centrifugal mixing device (2) is connected to the liquid inlet of the aeration chamber (31), and the liquid outlet of the aeration chamber (31) is connected to the irrigation pipeline (6). The operation control cabinet (4) is connected to the air pump (32). The air outlet of the air pump (32) is connected to the air inlet of the aeration disc (33). The aeration disc (33) is set on the bottom wall inside the aeration chamber (31).

8. The intelligent irrigation and fertilization machine as described in claim 7, characterized in that: A turbidity sensor (34) is installed on the inner wall of the aeration chamber (31), and the operation control cabinet (4) is connected to the turbidity sensor (34).

9. The intelligent irrigation and fertilization machine as described in claim 1, characterized in that: The centrifugal mixing device (2) includes a centrifugal vortex chamber (21); The upper part of the centrifugal vortex cavity (21) is a cylindrical structure, and the lower part of the centrifugal vortex cavity (21) is a conical structure. A tangential inlet (23) is provided on the circumferential surface of the cylindrical structure, and an axial outlet (24) is provided at the bottom of the conical structure. Multiple guide plates (22) are provided at intervals on the inner sidewall of the centrifugal vortex cavity (21). The tangential inlet (23) is connected to the liquid outlet of the jet premixing device (1), the axial outlet (24) is connected to the liquid inlet of the microbubble mixing device (3), and the guide plate (22) is used to block the rotating mixture in the centrifugal vortex chamber (21).

10. The intelligent irrigation and fertilization machine as described in claim 9, characterized in that: Two symmetrically arranged tangential inlets (23) are provided on the circumferential surface of the cylindrical structure. The liquid outlet of the jet premixing device (1) is divided into two branches, which are connected to the two tangential inlets (23) respectively.

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