High-density liquid oxygenation device for transportation

Abstract

The utility model belongs to aquatic transportation technical field, concretely relates to a high density liquid transportation is with oxygen -increasing device, including with the supermicro nanometer bubble generating assembly and gas supply assembly of booster pump outlet pipe connection, the supermicro nanomaer bubble generating assembly includes the coaxial setting of first conical tube, straight pipe and second conical tube in proper order, the inlet end diameter of first conical tube is greater than the export end diameter, the import end diameter of second conical tube is less than the export end diameter, and the inlet end of first conical tube export end and second conical tube are communicated through straight pipe, the import end of first conical tube is communicated with the outlet pipe, and second conical tube is used to place in the water body of transportation water tank, the one end of gas guide pipe is communicated with straight pipe, and the other end is connected with gas supply assembly through the lateral wall of transportation water tank and is connected, is used for the input of oxygen. The device can diffuse oxygen to deeper water body, efficiently realize the uniform dissolution of deep water oxygen, and maintain the activity of aquatic products in long-distance transportation.

Description

Technical Field

[0001] This utility model belongs to the field of aquatic product transportation technology, specifically relating to an oxygenation device for high-density liquid transportation. Background Technology

[0002] Oxygenation is crucial for maintaining the activity of aquatic organisms during high-density liquid aquatic product transportation. As aquatic organisms, their respiration depends on dissolved oxygen in the water. In the environment of high-density liquid aquatic product transportation, the large number of aquatic organisms per unit volume of water creates an extremely high demand for oxygen. If dissolved oxygen is insufficient, aquatic organisms will not be able to obtain enough oxygen for respiration, thus affecting their energy metabolism and physiological functions. For example, fish in a hypoxic state will have an increased respiratory rate and heart rate. They will also exhibit stress symptoms such as restlessness and agitation, which not only affect their health but may also lead to attacks, collisions, physical injuries, or even death. Therefore, using appropriate oxygenation equipment and methods can ensure that the dissolved oxygen content in the water is maintained at a level sufficient for the normal survival of aquatic organisms. This can significantly reduce the probability of aquatic organism death due to hypoxia, improve the success rate of transportation, and reduce economic losses.

[0003] Existing aeration systems mostly rely on gas supply or gas exchange at the water surface, which cannot efficiently achieve uniform oxygen dissolution in deep water. For example, current technologies use impeller-type aerators, which draw air into the water through a hollow shaft. The rotating impeller creates negative pressure to promote oxygen dissolution. However, the impeller's agitation only affects the surface water (depth < 1.5 meters), and the generated bubbles cannot sink effectively due to buoyancy. Experiments show that the dissolved oxygen level 3 meters below the aerator is more than 40% lower than at the surface, and the reliance on mechanical agitation leads to uneven water flow distribution, which can easily cause localized suffocation of aquatic products, making it difficult to ensure the survival rate of aquatic products during long-distance transportation. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the purpose of this utility model is to provide a high-density liquid transport oxygenation device that can diffuse gas into deeper water bodies, efficiently achieve uniform dissolution of oxygen in deep water, and maintain the activity of aquatic products during long-distance transportation.

[0005] The technical solution of this utility model is: An oxygenation device for high-density liquid transportation includes a booster pump, which has an inlet pipe and an outlet pipe. Both the inlet pipe and the outlet pipe are used to connect to a transport water tank to realize water circulation in the transport water tank. It also includes an air supply component and an ultra-micro nano bubble generating component installed in the transport water tank. The ultra-micro nanobubble generating assembly includes a first conical tube, a straight tube, and a second conical tube arranged coaxially in sequence. The first and second conical tubes are respectively provided with an inlet end and an outlet end. The diameter of the inlet end of the first conical tube is larger than the diameter of its outlet end, and the diameter of the inlet end of the second conical tube is smaller than the diameter of its outlet end. The diameters of the outlet end of the first conical tube and the inlet end of the second conical tube are both the same as the diameter of the straight tube. The outlet end of the first conical tube and the inlet end of the second conical tube are connected through the straight tube. The inlet end of the first conical tube is connected to the water outlet pipe, and the outlet end of the second conical tube is placed in the water of the transport tank. The assembly also includes: The gas supply assembly includes an oxygen source and an air compressor. The gas delivery ends of both the oxygen source and the air compressor are connected to the straight pipe through gas guide pipes for supplying oxygen into the straight pipe.

[0006] Preferably, the diameter of the straight tube is 1 / 5 to 1 / 3 of the diameter of the larger end of the first tapered tube.

[0007] Preferably, the cone angle of the second conical tube is 8°~12°, which is used to decelerate and pressurize the gas-liquid mixture.

[0008] Preferably, a gas regulating valve is also connected to the gas guide pipe. The gas regulating valve and the booster pump are both electrically connected to a PID controller. The PID controller is used to control the gas regulating valve and the booster pump to dynamically regulate the gas-liquid flow rate entering the straight pipe, so as to achieve the stability of the gas-liquid flow rate in the straight pipe.

[0009] Preferably, the oxygen source includes an oxygen generator and an emergency oxygen tank. The output ends of the oxygen generator and the emergency oxygen tank are connected to the gas delivery pipe through a gas delivery pipe, and a valve is provided on the gas delivery pipe.

[0010] Preferably, the outlet end of the second conical tube is fixed with a multi-layer microporous mesh, the pore size of the multi-layer microporous mesh gradually decreases from the inner layer to the outer layer, and the pore size of the microporous mesh is 20μm~50μm.

[0011] Preferably, an air purification structure is further provided between the air duct and the air supply component. The air purification structure includes, in sequence, a dual-stage PP cotton, an H13 filter cotton, and activated carbon, which are located between the air supply component and the air duct.

[0012] Preferably, multiple ultra-micro nanobubble generating components are provided and are evenly distributed in the transport water tank. The first conical tubes of the multiple ultra-micro nanobubble generating components are respectively connected to the water outlet pipe through the diversion pipe.

[0013] Compared with the prior art, the oxygenation device for high-density liquid transportation of this utility model has the following beneficial effects: In operation, the booster pump delivers water to the first conical tube under high pressure. As the inner diameter of the first conical tube gradually decreases, the flow velocity increases and the pressure decreases. When the water reaches the straight section, the flow velocity is at its maximum and the pressure is at its lowest, creating a negative pressure at the throat. The air supply component draws in oxygen-containing air through the air guide tube and forcibly mixes it with the high-speed water, causing the air to exist in the form of ultra-micro nanobubbles in the water. When the gas-liquid mixture enters the second conical tube, the flow velocity decreases and the pressure rises as the inner diameter of the second conical tube gradually increases, causing the ultra-micro nanobubbles to further break down and dissolve in the water. At the moment of breakage, the ultra-micro nanobubbles, due to their enormous surface tension, compress the internal gas to its limit, allowing the gas to diffuse into deeper layers of water. Furthermore, because the rising speed of ultra-micro nanobubbles is much smaller than that of conventional bubbles, they can sink to the bottom of the transport tank, solving the problem of traditional impeller-type aerators that only provide oxygen to the surface. This efficiently achieves uniform dissolution of oxygen in deep water, maintaining the activity of aquatic products during long-distance transportation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the ultra-micro nanobubble generating component in the embodiment of this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. Transport water tank; 2. Filter box; 3. Booster pump; 31. Inlet pipe; 32. Outlet pipe; 4. Ultra-micro nano bubble generating component; 41. First conical tube; 42. Straight pipe; 43. Second conical tube; 44. Air guide pipe; 5. One-way valve; 6. Air supply component; 7. Gas regulating valve; 8. Microporous mesh; 9. Air purification structure. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0019] See Figure 1 and Figure 2 As shown, in order to diffuse gas into deeper water bodies and efficiently achieve uniform dissolution of oxygen in deep water, maintaining the activity of aquatic products during high-density, long-distance transportation, this embodiment provides a high-density liquid transport oxygenation device. This device is applied to an aquatic product transport tank 1 and used in conjunction with the water filtration structure of the transport tank 1. A filter box 2 is installed on one side of the transport tank 1, with the inlet at the bottom of the filter box 2 connected to the transport tank 1. A filter layer is installed inside the filter box 2. This device includes a booster pump 3, which has an inlet pipe 31 and an outlet pipe 32. The booster pump 3 is preferably installed inside the filter box 2, with the inlet pipe 31 placed inside the filter box 2 and located above the filter layer. The outlet pipe 32 is used to connect to the transport tank 1, enabling the water in the transport tank 1 to circulate between the filter box 2 and the transport tank 1.

[0020] This device also includes a gas supply component 6 and an ultra-micro nanobubble generating component 4 disposed within the transport water tank 1. The ultra-micro nanobubble generating component 4 includes: a first conical tube 41, a straight tube 42, a second conical tube 43, and a gas guide tube 44. The first conical tube 41, the straight tube 42, and the second conical tube 43 are arranged coaxially in sequence. Both the first conical tube 41 and the second conical tube 43 have an inlet end and an outlet end, with the diameter of the inlet end of the first conical tube 41 being larger than the diameter of the outlet end, meaning the diameter of the first conical tube 41 gradually decreases from the inlet end to the outlet end. The diameter of the inlet end of the second conical tube 43 is smaller than the diameter of the outlet end, meaning the diameter of the second conical tube 43 gradually increases from the inlet end to the outlet end. Furthermore, the diameter of the outlet end of the first conical tube 41 and the diameter of the inlet end of the second conical tube 43 are both the same as the diameter of the straight tube 42. The inlet end of the first conical tube 41 is connected to the end of the outlet pipe 32 that enters the transport water tank 1, and the outlet end of the first conical tube 41 is connected to the inlet end of the second conical tube 43 through the straight tube 42. The outlet end of the second conical tube 43 is placed in the water in the transport water tank 1. One end of the air guide pipe 44 is connected to the straight tube 42, and the other end extends out of the side wall of the transport water tank 1 and is connected to the air supply end of the air source supply component 6, which is used to force the oxygen-containing air source into the straight tube 42. In addition, a one-way valve 5 is installed between the booster pump 3 and the inlet pipe to prevent water from flowing back to the booster pump 3.

[0021] In use, the booster pump 3 delivers the purified water, filtered through the filter layer, at high pressure to the first conical tube 41. As the inner diameter of the first conical tube 41 gradually decreases, the flow rate increases and the pressure decreases. When the water reaches the straight tube 42, the flow rate is at its maximum and the pressure is at its minimum. At this point, a negative pressure is generated at the throat. The air supply component 6 draws in oxygen-containing air through the air guide tube 44 and mixes it with the high-speed water, so that the air exists in the water in the form of ultra-micro nanobubbles. When the gas-liquid mixture enters the second conical tube 43, as the inner diameter of the second conical tube 43 gradually increases, the flow rate decreases and the pressure rises, causing the ultra-micro nanobubbles to break down further and dissolve in the water. Upon bursting, the ultra-micro nanobubbles, due to their immense surface tension, compress the internal gas to its limit, allowing it to diffuse into deeper water layers. Furthermore, because their rising speed is significantly lower than that of conventional bubbles, they sink to the bottom of transport tank 1, overcoming the limitation of traditional impeller-type aerators that only provide surface oxygenation. This efficiently achieves uniform oxygen dissolution in deep water. Through negative pressure suction and high-speed water flow forcibly mixing, the oxygen dissolution rate is increased to more than twice that of conventional aeration. Actual measurements show that the dissolved oxygen level at the bottom layer increased from 3 mg / L to 8-10 mg / L, supporting a transport density of 150 catties / m³. This effectively maintains the activity of aquatic products during high-density, long-distance transport.

[0022] Furthermore, the diameter of the straight tube 42 is 1 / 5 to 1 / 3 of the inner diameter of the end of the first tapered tube 41 furthest from the straight tube 42. Reducing the diameter of the straight tube 42 to 1 / 5 to 1 / 3 of the first tapered tube 41 ensures a throat flow velocity ≥15m / s, a negative pressure intensity of 0.4MPa, and a 30% increase in gas intake efficiency, avoiding interruption of intake due to insufficient flow velocity and ensuring the stability of negative pressure intake.

[0023] Furthermore, the second conical tube 43 has a cone angle of 8°~12°, which is used to decelerate and pressurize the gas-liquid mixture. The gradually expanding cone angle of 8°~12° allows the water flow velocity to be gradually reduced from 15m / s to 0.5m / s, preventing bubbles from merging and bursting due to a sudden increase in pressure, and maintaining nanoscale size stability.

[0024] See Figure 1As shown, the end of the gas delivery pipe 44 furthest from the straight pipe 42 is connected to a gas supply assembly 6. The gas supply assembly 6 includes an oxygen source, an air compressor, and a gas regulating valve 7. The outputs of the oxygen source and the air compressor are respectively connected to the gas delivery pipe 44, and the gas regulating valve 7 is installed on the gas delivery pipe 44. The oxygen source includes an oxygen generator and an emergency oxygen tank. The outputs of the oxygen generator and the emergency oxygen tank are connected to the gas delivery pipe 44 via a gas supply pipe, and a valve is installed on the gas supply pipe. Therefore, when in use, the device supports dual gas sources: an oxygen generator (93% pure oxygen) or an air compressor (low cost). In pure oxygen mode, the dissolved oxygen concentration can reach 1.5 times the conventional level, suitable for high-density transportation scenarios. Furthermore, when the oxygen generator malfunctions, the emergency oxygen tank automatically activates, with dissolved oxygen supply interruption time <10 seconds, avoiding sudden oxygen deficiency accidents during transportation.

[0025] Furthermore, the gas regulating valve 7 is electrically connected to a PID controller, which is also electrically connected to the booster pump 3. This allows for dynamic flow control of both the gas regulating valve 7 and the booster pump 3, stabilizing the gas-liquid flow rate at the straight pipe 42 position. The gas-liquid flow rate ratio at the straight pipe 42 position should ideally be set to 1:3 to 1:5. This 1:3 to 1:5 ratio balances the dissolved oxygen demand with the need for ultrafine nanobubble refinement; excessively high gas flow rate leads to the coalescence of ultrafine nanobubbles, while excessively low flow rate results in insufficient dissolved oxygen. The PID controller monitors the throat pressure in real time and dynamically adjusts the gas-liquid flow rate ratio (1:3 to 1:5) to ensure stable negative pressure. Experiments show that the dissolved oxygen fluctuation range has decreased from ±1.5 mg / L to ±0.3 mg / L.

[0026] See Figure 1 and Figure 2 As shown, a multi-layered microporous mesh 8 is fixed at the end of the second conical tube 43 away from the straight tube 42. The pore size of the multi-layered microporous mesh 8 gradually decreases from the inner layer to the outer layer, and the pore size of the microporous mesh 8 is 20μm~50μm. Through the microporous mesh 8 with a pore size of 20μm~50μm, the ultra-micro nanobubbles are further broken down to 70nm~130nm, the specific surface area increases by at least 100 times, and the dissolved oxygen uniformity reaches more than 95%.

[0027] See Figure 1 As shown, an air purification structure 9 is also installed between the air duct 44 and the air supply component. The air purification structure 9 includes, in sequence from the air supply component to the air duct 44, two-stage PP cotton, H13 filter cotton, and activated carbon. Through three-stage filtration (PP cotton → H13 filter cotton → activated carbon), 99% of dust, microorganisms, and volatile organic compounds in the air are removed, preventing impurities from clogging the straight pipe 42 or polluting the water.

[0028] Furthermore, multiple ultra-micro nanobubble generating components 4 are provided and evenly distributed within the transport water tank 1. These multiple ultra-micro nanobubble generating components 4 are connected to the outlet pipe 32 via diversion pipes. By evenly distributing multiple ultra-micro nanobubble generating components at the bottom of the water tank via diversion pipes, the dissolved oxygen coefficient of variation (CV value) is reduced to <5%, completely solving the problem of localized hypoxia associated with traditional single-point oxygenation.

[0029] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A high-density liquid transport oxygenation device, comprising a booster pump (3), the booster pump (3) having an inlet pipe (31) and an outlet pipe (32), both the inlet pipe (31) and the outlet pipe (32) being used to connect to a transport water tank (1) to realize water circulation within the transport water tank (1), characterized in that, It also includes a gas supply component (6) and an ultra-micro nanobubble generating component (4) disposed in the transport water tank (1); The ultra-micro nano bubble generating component (4) includes a first conical tube (41), a straight tube (42), and a second conical tube (43) arranged coaxially in sequence. The first conical tube (41) and the second conical tube (43) are respectively provided with an inlet end and an outlet end. The diameter of the inlet end of the first conical tube (41) is larger than the diameter of the outlet end, and the diameter of the inlet end of the second conical tube (43) is smaller than the diameter of the outlet end. The diameter of the outlet end of the first conical tube (41) and the diameter of the inlet end of the second conical tube (43) are the same as the diameter of the straight tube (42). The outlet end of the first conical tube (41) and the inlet end of the second conical tube (43) are connected through the straight tube (42). The inlet end of the first conical tube (41) is connected to the water outlet pipe (32), and the outlet end of the second conical tube (43) is placed in the water body of the transport water tank (1). The gas supply component (6) includes an oxygen source and an air compressor. The gas delivery ends of the oxygen source and the air compressor are connected to the straight pipe (42) through a gas guide pipe (44) for supplying oxygen into the straight pipe (42).

2. The oxygenation device for high-density liquid transportation according to claim 1, characterized in that, The diameter of the straight tube (42) is 1 / 5 to 1 / 3 of the larger port diameter of the first tapered tube (41).

3. The oxygenation device for high-density liquid transportation according to claim 1, characterized in that, The cone angle of the second conical tube (43) is 8°~12°, which is used to decelerate and pressurize the gas-liquid mixture.

4. The oxygenation device for high-density liquid transportation according to claim 1, characterized in that, A gas regulating valve (7) is also connected to the gas guide pipe (44). The gas regulating valve (7) and the booster pump (3) are electrically connected to a PID controller. The PID controller is used to control the gas regulating valve (7) and the booster pump (3) to dynamically regulate the gas and liquid flow rate entering the straight pipe (42) so as to achieve the stability of the gas and liquid flow rate in the straight pipe (42).

5. The oxygenation device for high-density liquid transportation according to claim 1, characterized in that, The oxygen source includes an oxygen generator and an emergency oxygen tank. The output ends of the oxygen generator and the emergency oxygen tank are connected to the gas delivery pipe (44) through a gas delivery pipe, and a valve is provided on the gas delivery pipe.

6. The oxygenation device for high-density liquid transportation according to claim 1, characterized in that, The outlet end of the second conical tube (43) is fixed with a multi-layer microporous mesh (8). The pore size on the multi-layer microporous mesh (8) gradually decreases from the inner layer to the outer layer, and the pore size on the microporous mesh (8) is 20μm~50μm.

7. The oxygenation device for high-density liquid transportation according to claim 5, characterized in that, An air purification structure (9) is also provided between the air duct (44) and the air supply component. The air purification structure (9) includes, in sequence, a double-stage PP cotton, an H13 filter cotton and activated carbon from the air supply component to one side of the air duct (44).

8. The oxygenation device for high-density liquid transportation according to claim 1, characterized in that, Multiple ultra-micro nano bubble generating components (4) are provided and are evenly distributed in the transport water tank (1). The first conical tubes (41) of the multiple ultra-micro nano bubble generating components (4) are connected to the water outlet pipe (32) through the diversion pipes respectively.

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