Agitation-type localized fluidized negative pressure jet ice-mixing device and method of use thereof

Abstract

The application discloses a perturbation type local fluidization negative pressure jet suction ice mixing device and a use method thereof, relates to the technical field of abrasive gas jet and material conveying, and comprises an ice mixing bin, a distributor and a fluidization pipe column arranged in the ice mixing bin from top to bottom. The ice mixing bin is provided with an ice particle inflow cavity and an ice particle outflow cavity. The fluidization pipe column is used for injecting fluidization gas into the ice mixing bin. The distributor is provided with a distribution part capable of dispersing ice particles to the surroundings and a hollow balance part for providing a rapid passage for the fluidization gas. The jet suction pipeline is provided with a jet gas source pipe section and a Venturi pipe section, and the jet gas source pipe section is provided with an ice receiving port communicated with the ice particle outflow cavity. The fluidization gas is injected through the fluidization pipe column, the ice particles in the lower part of the ice mixing bin are fully fluidized, the hollow balance part is used for rapidly sending the fluidization gas to the upper part of the ice mixing bin, the ice particles in the upper part are fluidized, the air pressure of the lower part and the upper part of the ice mixing bin is balanced, and the ice particles are prevented from being compacted under the action of the air pressure difference.

Description

Technical Field

[0001] This invention relates to the field of abrasive air jet and material conveying technology, and in particular to a disturbance-type local fluidized negative pressure jet suction mixing device and its usage method. Background Technology

[0002] Since its introduction in 1980, abrasive jetting has attracted considerable attention. The mixing of solid particles and fluid impacts a target, efficiently destroying it. Due to its strong material adaptability and high cutting efficiency, abrasive jetting is widely used in rock breaking, cleaning, and other fields. Traditional abrasive jets typically use high-hardness solid particles, such as silica sand. These particles effectively increase the impact force on the target, enabling cutting and drilling of rocks or metal pipe walls. However, for the processing and cleaning of precision components, a jet using silica sand as an abrasive will obviously cause some damage. Furthermore, traditional methods often face the challenge of difficult particle recovery. To solve these two problems, ice-particle abrasive jetting emerged.

[0003] Ice abrasive jetting is a novel, pollution-free, and green surface processing technology. Ice particles are solid particles, and air serves as the carrier for the abrasive. The soft texture of ice particles and their ability to liquefy into water after use solves two major challenges faced by traditional abrasive jetting, enabling efficient metal rust removal, cleaning of precision components, and other operations with minimal damage to the target. Currently, the most common ice-making method involves spraying atomized water droplets into a pre-cooled environment. After ice making, the ice particles are sent to a mixing chamber for later use. However, the following technical challenges remain in the mixing chamber stage: without external force, ice particles tend to stack up, causing the lower layers to compact and clump, leading to blockage of the ice outlet and affecting spraying efficiency.

[0004] Currently, methods to induce ice particles to fall are limited to mechanical means such as tapping and shaking. These methods can lead to mechanical interlocking and bridging between ice particles, which can have a counterproductive effect on subsequent ice falling. Summary of the Invention

[0005] The purpose of this invention is to provide a disturbance-type local fluidized negative pressure jet suction ice mixing device and its usage method, which solves the problem of material feeding difficulties caused by ice particle compaction and bridging inside the ice mixing chamber in the prior art.

[0006] The above-mentioned objectives of the present invention can be achieved by the following technical solutions:

[0007] This invention provides a perturbation-type localized fluidized negative pressure jet adsorption ice mixing device, comprising:

[0008] The ice mixing chamber is equipped with an ice particle inlet chamber and an ice particle outlet chamber.

[0009] A fluidizing tube is located at the lower part of the ice mixing chamber and is connected to the ice mixing chamber. The fluidizing tube is used to introduce fluidizing gas into the ice mixing chamber.

[0010] A distributor is located inside the upper part of the ice mixing chamber. The distributor has a distributing section and a hollow balancing section connected together. The distributing section can disperse the ice particles entering the ice mixing chamber to the surrounding area. The hollow portion of the hollow balancing section forms an air passage with a cross-section reduced along the direction of gravity. The hollow balancing section has an air inlet and an air outlet communicating with the air passage. The air inlet is positioned lower than the air outlet. Fluidizing gas introduced through the fluidizing tube can flow out from the air outlet after passing through the air passage.

[0011] The jet suction pipe has a jet gas source pipe section and a venturi pipe section that are connected together. The side wall of the jet gas source pipe section is provided with an ice receiving port that is connected to the ice particle outflow chamber.

[0012] In one specific embodiment, the air outlet includes a plurality of vent holes spaced apart along the circumference.

[0013] In one specific embodiment, the fluidizing tube has an air inlet section and an air outlet section. The end of the air outlet section is provided with a sealing element, and the air outlet section is provided with a plurality of air outlet holes spaced apart along its circumference. The fluidizing tube is connected to the ice mixing chamber through the plurality of air outlet holes.

[0014] In one specific embodiment, the centerline of the air outlet section coincides with the centerline of the distributor.

[0015] In one specific embodiment, the sealing member has a conical structure, and the apex of the cone of the sealing member is positioned directly opposite the air inlet.

[0016] In one specific embodiment, the dispensing section has a conical structure, with the cone apex facing the ice particle inflow cavity.

[0017] In one specific embodiment, the hollow balancing part has a hollow frustum structure, and the diameter of the hollow balancing part is reduced along the direction of gravity.

[0018] In one specific embodiment, the ice mixing chamber is provided with at least one liquid nitrogen fluidizing tube string, and a plurality of liquid nitrogen nozzles are spaced apart on the liquid nitrogen fluidizing tube string along the guide line direction.

[0019] In one specific embodiment, a plurality of liquid nitrogen fluidizing tube strings are spaced apart inside the ice mixing chamber. Along the guide line direction of the liquid nitrogen fluidizing tube strings, a plurality of first liquid nitrogen nozzles are spaced apart on the liquid nitrogen fluidizing tube strings. A second liquid nitrogen nozzle is provided at the end of the liquid nitrogen fluidizing tube strings. The nozzles of the plurality of first liquid nitrogen nozzles are arranged away from the inner wall of the ice mixing chamber, and the nozzles of the second liquid nitrogen nozzles are arranged parallel to the end axis of the liquid nitrogen fluidizing tube strings.

[0020] In one specific embodiment, the ice particle outflow chamber is provided with a switching valve for controlling the outflow of ice particles.

[0021] In one specific embodiment, the ice mixing chamber is a closed, pressurized metal chamber, and the ice mixing chamber is provided with a movable cover, which is connected to the inlet of the ice particle inflow chamber.

[0022] In one specific embodiment, the inner wall of the ice mixing chamber is coated with one of the following: polytetrafluoroethylene coating, polyethylene coating, polymethyl methacrylate coating, fluororubber coating, ceramic coating, and polyurethane coating.

[0023] In one specific embodiment, the outside of the ice mixing chamber is covered with an insulation layer.

[0024] The present invention also provides a method of using a perturbation-type local fluidized negative pressure jet-suction ice mixing device, the method of which is applicable to the perturbation-type local fluidized negative pressure jet-suction ice mixing device as described above, and includes the following steps:

[0025] Connect the movable cover to the outlet of the ice-making device, connect the outer interface of the liquid nitrogen fluidizing tube string to the liquid nitrogen supply line, connect the outer interface of the fluidizing tube column to the fluidizing gas source, connect the jet gas source pipe section to the ice spraying gas source, connect the Venturi tube section to the ice spraying line, and connect the end of the ice spraying line to a jet nozzle.

[0026] Open the liquid nitrogen supply pipeline valve to pre-cool the ice mixing chamber and keep the temperature inside the ice mixing chamber below -100℃;

[0027] Close the liquid nitrogen supply line valve. After the ice mixing chamber is completely depressurized, open the movable cover, transfer the ice particles prepared by the ice making device into the ice mixing chamber, and then close the movable cover.

[0028] Turn on the fluidizing gas source in the fluidizing column, turn on the ice spraying gas source in the jet suction pipe, and simultaneously turn on the liquid nitrogen supply line valve. Open the switch valve, and the ice particles enter the jet suction pipe through the ice particle outlet chamber. Under the push of the ice spraying gas source and the adsorption of the Venturi tube section, they enter the ice spraying line and are finally sprayed out from the jet nozzle to form an ice particle air jet.

[0029] The features and advantages of this invention are:

[0030] 1. The disturbance-type local fluidized negative pressure jet suction ice mixing device of the present invention, by setting a distributor, allows the ice particles entering from the ice particle inflow chamber to be fully dispersed around the ice mixing chamber, while preventing the ice particles from clogging the vent holes during the entry process; the fluidizing gas injected through the fluidizing tube column acts on the lower part of the ice mixing chamber, promoting the full fluidization of this part of the ice particles, and at the same time, it quickly reaches the upper part of the ice mixing chamber through the hollow balance part, fluidizing the ice particles in the upper part of the ice mixing chamber, and balancing the air pressure in the upper and lower parts of the ice mixing chamber, preventing the ice particles from being compacted or blocked, and allowing the ice particles to fall more smoothly; by setting a jet suction pipe with a jet gas source pipe section and a Venturi pipe section, the jet gas flow forms a negative pressure zone at the end of the Venturi pipe section that can adsorb the ice particles, thereby allowing the ice particles flowing out of the ice particle outflow chamber to flow into the subsequent pipe quickly and stably.

[0031] 2. The method of using the perturbation-type local fluidization negative pressure jet suction ice mixing device of the present invention involves the simultaneous action of liquid nitrogen in the liquid nitrogen fluidization tube string and fluidizing gas in the fluidization tube column on the lower part of the ice mixing chamber, forming multi-layer local fluidization, which promotes the full fluidization of ice particles in the lower part of the ice mixing chamber and allows them to fall more smoothly into the jet suction pipe, avoiding the problems of easy compaction, bridging, and mechanical interlocking of ice particles in the lower part of the ice mixing chamber in traditional experiments. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the perturbation-type local fluidization negative pressure jet suction and mixing ice device of the present invention;

[0034] Figure 2 This is a flowchart illustrating the usage method of the perturbation-type local fluidization negative pressure jet suction mixing ice device of the present invention.

[0035] Explanation of icon numbers:

[0036] 1. Ice mixing chamber; 11. Ice particles flowing into the chamber; 12. Ice particles flowing out of the chamber; 13. Movable lid;

[0037] 2. Distributor; 21. Distributor section; 22. Hollow balance section; 221. Vent hole;

[0038] 3. Fluidized tubing; 31. Ventilation section; 32. Exhaust section; 321. Exhaust port; 33. Sealing components;

[0039] 4. Jet suction pipe; 41. Jet gas source pipe section; 42. Venturi pipe section;

[0040] 5. Pressure sensor;

[0041] 6. Temperature sensor;

[0042] 7. Switch valve;

[0043] 8. Thermal insulation layer;

[0044] 9. Liquid nitrogen fluidization tube string; 91. Metal ferrule; 92. First liquid nitrogen nozzle; 93. Second liquid nitrogen nozzle. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] like Figure 1 As shown, this invention provides a perturbation-type local fluidized negative pressure jet suction ice mixing device, including an ice mixing chamber 1 and a distributor 2 and a fluidizing column 3 arranged sequentially from top to bottom within the ice mixing chamber. The ice mixing chamber 1 has an ice particle inflow chamber 11 and an ice particle outflow chamber 12; the fluidizing column 3 is located at the lower interior of the ice mixing chamber 1 and is connected to the ice mixing chamber 1, and is used to introduce fluidizing gas into the ice mixing chamber 1; the distributor 2 is located at the upper interior of the ice mixing chamber 1, and has a distributing section 21 and a hollow balancing section 22 connected to each other. The distributing section 21 can disperse the ice particles entering the ice mixing chamber 1 to the surrounding area, and the hollow portion of the hollow balancing section 22 forms a weight-bearing... The air passage is designed with a reduced cross-section in the force direction. The hollow balance part 22 has an air inlet and an air outlet connected to the air passage. The air inlet is positioned lower than the air outlet. The fluidizing gas introduced through the fluidizing tube column 3 can reach the upper part of the ice mixing chamber 1 through the air passage of the hollow balance part 22 and flow out from the air outlet. The jet suction pipe 4 has a jet gas source pipe section 41 and a venturi pipe section 42 connected to each other. The side wall of the jet gas source pipe section 41 is provided with an ice receiving port connected to the ice particle outflow chamber 12.

[0047] Specifically, such as Figure 1As shown, the distributor 2 includes a distributing section 21 and a hollow balancing section 22. Along the direction of gravity, the projection of the distributing section 21 can completely cover the projection of the hollow balancing section 22. The ice particles entering from the ice particle inflow chamber 11 are fully dispersed to the periphery of the chamber by the disturbance of the distributing section 21. In order to prevent the ice particles from blocking the air outlet during the entry process, the air outlet is provided on the hollow balancing section 22. The fluidizing gas injected by the self-fluidizing column 3 first contacts the ice particles at the bottom of the mixing chamber 1, fluidizing these ice particles. Then, the fluidizing gas diffuses upward, fluidizing the ice particles dispersed to the surrounding area by the distribution section 21. After the fluidizing gas diffuses to the horizontal plane at the lower end of the hollow balance section 22, part of the fluidizing gas quickly reaches the upper part of the mixing chamber 1 through the air passage formed in the hollow balance section 22, and flows out through the air outlet on the hollow balance section 22, fluidizing the ice particles at the top of the mixing chamber 1. Part of the fluidizing gas continues to diffuse upward from the surrounding area of ​​the mixing chamber 1, fluidizing the ice particles it contacts. In this way, the fluidizing gas injected into the self-fluidizing column 3 can fluidize the ice particles in the lower part of the ice mixing chamber 1, and can also quickly enter the distributor 2 through the hollow balance section 22, and enter the annular space between the distributor 2 and the ice mixing chamber 1 through the air outlet, fluidizing the ice particles in the upper part of the ice mixing chamber 1, and balancing the air pressure in the lower and upper parts of the ice mixing chamber 1, preventing the ice particles from being compacted under the action of air pressure difference.

[0048] Preferably, the vertical distance between the hollow balancing part of the distributor and the fluidizing column is one-fifth of the vertical distance of the mixing chamber. To facilitate the falling of ice particles, the lower part of the mixing chamber 1 adopts a stepped funnel-shaped structure design. For ease of manufacturing, the distributing part 21 and the hollow balancing part 22 of the distributor 2 are spliced ​​together. To ensure that the ice particles are evenly and fully dispersed around the chamber, the distributor 2 is welded and fixed to the mixing chamber 1 by lifting lugs. In this embodiment, the fluidizing gas injected by the fluidizing column 3 is cold air that has been pre-cooled by removing water from the outside, and the ice spray gas source entering the injection pipe 4 is from the same source as the fluidizing gas injected by the fluidizing column 3. Preferably, the mixing chamber 1 is equipped with at least one pressure sensor 5 for detecting the pressure inside the chamber and at least one temperature sensor 6 for detecting the ambient temperature inside the chamber. Both the pressure sensor 5 and the temperature sensor 6 are fixed by corresponding threaded bushings on the mixing chamber 1.

[0049] The disturbance-type local fluidized negative pressure jet suction ice mixing device of the present invention, by setting a distributor 2, allows the ice particles entering from the ice particle inflow chamber 11 to be fully dispersed around the ice mixing chamber 1, while preventing the ice particles from clogging the air outlet during the entry process; the fluidizing gas injected through the fluidizing tube column 3 acts on the lower part of the ice mixing chamber 1, promoting the full fluidization of this part of the ice particles, and at the same time, it quickly reaches the upper part of the ice mixing chamber 1 through the hollow balance part 22, fluidizing the ice particles in the upper part of the ice mixing chamber 1, and balancing the air pressure in the upper and lower parts of the ice mixing chamber 1, preventing the ice particles from being compacted or blocked, and allowing the ice particles to fall more smoothly; by setting a jet suction pipe 4 with a jet gas source pipe section 41 and a Venturi pipe section 42, the jet gas flow forms a negative pressure zone at the end of the Venturi pipe section 42 that can adsorb the ice particles, thereby allowing the ice particles flowing out of the ice particle outflow chamber 12 to flow into the subsequent pipe quickly and stably.

[0050] According to one embodiment of the present invention, the air outlet includes a plurality of vent holes 221 arranged at intervals along the circumference.

[0051] Specifically, such as Figure 1 As shown, the hollow balance section 22 has multiple vent holes 221 spaced apart on the circumference near the material distribution section. The fluidizing gas entering the air passage of the hollow balance section 22 is dispersed to the surrounding area through the multiple vent holes 221 to fully fluidize the ice particles around the upper part of the ice mixing chamber 1.

[0052] According to one embodiment of the present invention, the ice particle outflow chamber 12 is provided with a switching valve 7 for controlling the outflow of ice particles.

[0053] Specifically, such as Figure 1 As shown, a switching valve 7 is provided on the ice particle outflow chamber 12. By adjusting the opening and closing amplitude of the switching valve 7, the amount of ice particles falling can be effectively controlled, thereby regulating the ice particle concentration during the air ice particle jet process. In this embodiment, a ball valve is selected as the switching valve 7.

[0054] According to one embodiment of the present invention, the outside of the ice mixing chamber 1 is covered with a heat insulation layer 8.

[0055] Specifically, such as Figure 1 As shown, the outside of the ice mixing chamber 1 is covered with a polyurethane foam insulation layer 8 to reduce heat transfer between the inside of the insulation layer 8 and the external environment, maintain a long-term low-temperature environment inside the chamber, and prevent ice particles from sticking together due to the ambient temperature.

[0056] According to one embodiment of the present invention, the ice mixing chamber 1 is a closed pressure-bearing metal chamber, and the ice mixing chamber 1 is provided with a movable cover 13, which is connected to the inlet of the ice particle inflow chamber 11.

[0057] Specifically, the ice mixing chamber 1 adopts a closed, pressure-bearing metal chamber design, preventing direct contact between ice particles and the external environment, thus effectively preventing ice particles from sticking together due to external temperature influences. For example... Figure 1 As shown, the ice mixing chamber 1 is equipped with a movable cover 13 that connects to the inlet of the ice particle inflow chamber 11. The movable cover 13 is used to connect to the outlet of the ice-making device to achieve ice particle transfer in a sealed state. In this embodiment, the ice mixing chamber 1 is made of 304 stainless steel. The opening and closing state of the movable cover 13 is automatically controllable.

[0058] According to one embodiment of the present invention, the inner wall of the ice mixing chamber 1 is coated with one of the following: polytetrafluoroethylene coating, polyethylene coating, polymethyl methacrylate coating, fluororubber coating, ceramic coating, and polyurethane coating.

[0059] Specifically, by performing surface treatment on the inner wall of the ice mixing chamber 1, the inner wall of the ice mixing chamber 1 has a lower surface energy, thereby reducing the risk of ice particles adhering to the inner wall of the ice mixing chamber 1.

[0060] According to one embodiment of the present invention, the fluidizing column 3 has a ventilation section 31 and an outlet section 32. The end of the outlet section 32 is provided with a sealing member 33. The outlet section 32 is provided with a plurality of outlet holes 321 spaced apart along its circumference. The fluidizing column 3 is connected to the ice mixing chamber 1 through the plurality of outlet holes 321.

[0061] Specifically, such as Figure 1 As shown, the lower wall of the mixing chamber 1 is provided with mounting holes for placing the fluidizing column 3. The end of the outlet section 32 of the fluidizing column 3 is provided with a sealing element 33. Near the sealing element 33, the outlet section 32 has multiple outlet holes 321 spaced apart along its circumference. The sealing element 33 blocks the fluidizing gas injected into the fluidizing column 3, forcing the fluidizing gas to flow out from the multiple outlet holes 321 along the circumference of the outlet section 32, increasing the contact between the fluidizing gas and the ice particles, thus achieving better local fluidization of the ice particles. In this embodiment, the fluidizing column 3 is formed by bending a hollow tube.

[0062] Furthermore, the centerline of the air outlet section 32 coincides with the centerline of the distributor 2.

[0063] Specifically, such as Figure 1 As shown, by aligning the centerline of the air outlet section 32 with the centerline of the distributor 2, the ice particles dispersed by the distributor 2 to the surrounding area of ​​the chamber are fully fluidized locally to the greatest extent.

[0064] Furthermore, the sealing element 33 has a conical structure, with the cone apex of the sealing element 33 facing the air inlet of the hollow balance part 22.

[0065] Specifically, such as Figure 1 As shown, the sealing member 33 at the end of the air outlet section 32 has a conical structure, and the cone top of the sealing member 33 is positioned directly opposite the air inlet of the hollow part of the hollow balance section 22 that forms an air passage, so as to disperse the ice particles that come into contact with the sealing member 33 to the surrounding area of ​​the chamber.

[0066] According to one embodiment of the present invention, the dispensing section 21 has a conical structure, and the cone apex of the dispensing section 21 is positioned directly opposite the ice particle inflow cavity 11.

[0067] Specifically, such as Figure 1 As shown, the distributing section 21 of the distributor 2 has a conical structure, and the top of the cone of the distributing section 21 is set directly opposite the ice particle inflow chamber 11 so that the ice particles are fully dispersed to the surrounding area of ​​the chamber when they enter the mixing chamber 1.

[0068] Furthermore, the hollow balancing part 22 has a hollow frustum structure, and the diameter of the hollow balancing part 22 is reduced along the direction of gravity.

[0069] Specifically, such as Figure 1 As shown, the hollow balance part 22 has a hollow frustum structure, and the diameter of the hollow balance part 22 is reduced along the direction of gravity to quickly balance the air pressure in the lower and upper parts of the ice mixing chamber 1 and prevent the ice particles from being compacted under the action of air pressure difference.

[0070] After analysis, the inventors found that currently, stimulating ice particles to fall relies on only a single method and has failed to attempt to couple multiple methods.

[0071] According to one embodiment of the present invention, at least one liquid nitrogen fluidizing tube string 9 is provided in the mixing chamber 1, and a plurality of liquid nitrogen nozzles are provided at intervals along the guide line direction of the liquid nitrogen fluidizing tube string 9.

[0072] Specifically, such as Figure 1 As shown, the ice mixing chamber 1 and the insulation layer 8 are respectively provided with through holes for accommodating liquid nitrogen fluidized pipe strings 9. The liquid nitrogen fluidized pipe strings 9 are fixed to the insulation layer by metal sleeves 91. Along the guide line direction of the liquid nitrogen fluidized pipe strings 9, multiple liquid nitrogen nozzles are spaced apart on the liquid nitrogen fluidized pipe strings 9. Liquid nitrogen is introduced into the ice mixing chamber 1 through the liquid nitrogen fluidized pipe strings 9 to maintain the ultra-low temperature environment inside the ice mixing chamber 1; at the same time, through the coupling of the liquid nitrogen fluidized pipe strings 9 and the fluidizing tube column 3, liquid nitrogen and fluidizing gas act simultaneously on the lower part of the ice mixing chamber 1 to achieve multi-level fluidization of ice particles. In this embodiment, the guide line of the liquid nitrogen fluidized pipe strings 9 is consistent with the wall contour of the ice mixing chamber 1. The liquid nitrogen nozzles are straight rotary nozzles with impellers to achieve atomization and spraying of liquid nitrogen.

[0073] According to one embodiment of the present invention, a plurality of liquid nitrogen fluidizing tube strings 9 are spaced apart inside the ice mixing chamber 1. A plurality of first liquid nitrogen nozzles 92 are spaced apart on the liquid nitrogen fluidizing tube strings 9 along the guide line direction. A second liquid nitrogen nozzle 93 is provided at the end of the liquid nitrogen fluidizing tube strings 9. The nozzles of the plurality of first liquid nitrogen nozzles 92 are disposed away from the inner wall of the ice mixing chamber 1, and the nozzles of the second liquid nitrogen nozzles 93 are disposed parallel to the end axis of the liquid nitrogen fluidizing tube strings 9.

[0074] Specifically, such as Figure 1 As shown, multiple liquid nitrogen fluidization tube strings 9 are spaced apart on the circumference close to the inner wall of the ice mixing chamber 1. Along the guide line of the liquid nitrogen fluidization tube strings 9, multiple first liquid nitrogen nozzles 92 with nozzles facing away from the inner wall of the ice mixing chamber 1 are spaced apart on the liquid nitrogen fluidization tube strings 9. At the end of the liquid nitrogen fluidization tube strings 9, there are second liquid nitrogen nozzles 93 with nozzles parallel to the axis of the end of the liquid nitrogen fluidization tube strings 9. In this way, the liquid nitrogen in the liquid nitrogen fluidization tube strings 9 and the fluidizing gas in the fluidization tube column 3 act simultaneously on the lower part of the ice mixing chamber 1, enhancing the local fluidization effect of the ice particles, so that the ice particles can fall more smoothly to the switch valve 7; at the same time, the liquid nitrogen fluidization tube strings 9, which are close to the inner wall of the ice mixing chamber 1, are closer to the ice particles that are dispersed to the surrounding area, so that the fluidization effect can be better exerted.

[0075] Please refer to the following: Figure 2 As shown, the present invention also provides a method of using a perturbation-type local fluidized negative pressure jet-suction ice mixing device. This method is applicable to the perturbation-type local fluidized negative pressure jet-suction ice mixing device as described above, and includes the following steps:

[0076] Step S1: Connect the movable cover 13 to the outlet of the ice-making device, connect the outer interface of the liquid nitrogen fluidizing tube string 9 to the liquid nitrogen supply line, connect the outer interface of the fluidizing tube column 3 to the fluidizing gas source, connect the jet gas source section 41 to the ice spraying gas source, connect the Venturi tube section 42 to the ice spraying line, and connect the end of the ice spraying line to the jet nozzle.

[0077] Step S2: Open the liquid nitrogen supply pipeline valve to pre-cool the ice mixing chamber 1 and keep the temperature inside the ice mixing chamber 1 below -100℃.

[0078] Step S3: Close the liquid nitrogen supply line valve. After the ice mixing chamber 1 is completely depressurized, open the movable cover 13, transfer the ice particles prepared by the ice making device into the ice mixing chamber 1, and close the movable cover 13.

[0079] Step S4: Turn on the fluidizing gas source in the fluidizing column 3, turn on the ice spraying gas source in the jet pipe 4, and at the same time turn on the liquid nitrogen supply line valve and open the switch valve 7. The ice particles enter the jet pipe 4 through the ice particle outlet chamber 12, and enter the ice spraying line under the push of the ice spraying gas source and the adsorption of the Venturi tube section 42. Finally, they are sprayed out from the jet nozzle to form an ice particle air jet.

[0080] The method of using the perturbation-type local fluidization negative pressure jet suction ice mixing device of the present invention involves the simultaneous action of liquid nitrogen in the liquid nitrogen fluidization tube string 9 and fluidizing gas in the fluidization tube column 3 on the lower part of the ice mixing chamber 1, forming multi-level local fluidization. This promotes the full fluidization of ice particles in the lower part of the ice mixing chamber 1, allowing them to fall more smoothly into the jet suction pipe 4. This avoids the problems of ice particles in the lower part of the ice mixing chamber 1 being easily compacted, bridging, and mechanical interlocking that occur in traditional experiments.

[0081] Specifically, such as Figure 2 As shown, the method of using the perturbation-type local fluidization negative pressure jet suction ice mixing device includes the following steps:

[0082] Step S1: Pipeline connection. Connect the movable cover 13 to the outlet of the ice-making device, connect the external interface of the liquid nitrogen fluidization tube string 9 to the liquid nitrogen supply line, connect the external interface of the fluidization tube column 3 to the fluidization gas source, connect the injection gas source section 41 to the ice spraying gas source, connect the Venturi tube section 42 to the ice spraying line, and connect the end of the ice spraying line to the jet nozzle.

[0083] Step S2: Pre-cooling of Ice Mixing Chamber 1. Open the liquid nitrogen supply line valve to pre-cool ice mixing chamber 1, maintaining the internal temperature of ice mixing chamber 1 below -100℃. During this process, the host computer adaptively adjusts the liquid nitrogen flow rate in the liquid nitrogen supply line based on the real-time monitoring and feedback of the internal temperature value from temperature sensor 6, until the temperature inside ice mixing chamber 1 is maintained below -100℃.

[0084] Step S3: Transfer ice particles to ice mixing chamber 1. Close the liquid nitrogen supply line valve. After the pressure sensor 5 detects that the ice mixing chamber 1 is completely depressurized, open the movable cover 13, transfer the ice particles prepared by the ice making device into the ice mixing chamber 1, and close the movable cover 13.

[0085] Step S4: Start the ice particle air jet. Turn on the fluidizing gas source in the fluidizing column 3, turn on the ice spraying gas source in the jet suction pipe 4, and at the same time, turn on the liquid nitrogen supply line valve again and open the switch valve 7. The ice particles in the mixing chamber 1 are fully fluidized under the action of liquid nitrogen and fluidizing gas. Under the control of the switch valve 7, they enter the jet gas source section 41 of the jet suction pipe 4 through the ice particle outlet chamber 12 at an appropriate ice discharge rate. As the cross-sectional area of ​​the ice spraying gas flow changes from large to small when it flows through the Venturi section 42, the flow velocity of the ice spraying gas increases. The ice spraying gas forms a negative pressure zone at the end of the Venturi section 42. This negative pressure zone will have an adsorption effect on the ice particles. The ice particles entering the jet gas source section 41 are pushed by the ice spraying gas source and adsorbed by the Venturi section 42, and finally sprayed out from the jet nozzle to form an ice particle air jet. During this process, the host computer adaptively adjusts the liquid nitrogen flow rate in the liquid nitrogen supply pipeline and the fluidizing gas flow rate in the fluidizing column 3 based on the real-time pressure value monitored and fed back by the pressure sensor 5, in order to balance safety and the effect of local fluidization. In this embodiment, the fluidizing gas source and the ice spraying gas source are from the same source, both being pre-cooled cold air after water removal.

[0086] The above descriptions are merely a few embodiments of the present invention. Those skilled in the art can make various modifications or variations to the embodiments of the present invention based on the content disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A perturbation type local fluidization negative pressure jet suction ice mixing device, characterized in that, include: The ice mixing chamber is equipped with an ice particle inlet chamber and an ice particle outlet chamber. A fluidizing tube is located at the lower part of the ice mixing chamber and is connected to the ice mixing chamber. The fluidizing tube is used to introduce fluidizing gas into the ice mixing chamber. The distributor is located inside the upper part of the ice mixing chamber. The distributor has a distributing part and a hollow balancing part connected to each other. The distributing part can disperse the ice particles entering the ice mixing chamber to the surrounding area. The hollow part of the hollow balancing part forms an air passage with a cross-section reduced along the direction of gravity. The lower part and the upper part of the hollow balancing part have an air inlet and an air outlet respectively communicating with the air passage. The position of the air inlet is lower than that of the air outlet. The fluidizing gas introduced through the fluidizing column can flow out from the outlet after passing through the gas passage; The jet suction pipe has a jet gas source pipe section and a venturi pipe section that are connected together. The side wall of the jet gas source pipe section is provided with an ice receiving port that is connected to the ice particle outflow chamber.

2. The perturbation-type local fluidized negative pressure jet-suction ice mixing device according to claim 1, characterized in that, The air outlet includes a plurality of vent holes spaced apart along the circumference.

3. The perturbation-type local fluidization negative pressure jet-suction ice mixing device according to claim 1, characterized in that, The fluidizing tube has an air inlet section and an air outlet section. The end of the air outlet section is provided with a sealing element. The air outlet section has a plurality of air outlet holes spaced apart along its circumference. The fluidizing tube is connected to the ice mixing chamber through the plurality of air outlet holes.

4. The perturbation-type local fluidization negative pressure jet-suction ice mixing device according to claim 3, characterized in that, The centerline of the air outlet section coincides with the centerline of the distributor.

5. The perturbation-type local fluidization negative pressure jet suction mixing ice device according to claim 4, characterized in that, The sealing element has a conical structure, and the apex of the cone is positioned directly opposite the air inlet.

6. The perturbation-type local fluidization negative pressure jet suction ice mixing device according to claim 1, characterized in that, The material distribution section has a conical structure, and the top of the cone is positioned directly opposite the ice particle inflow cavity.

7. The perturbation-type local fluidization negative pressure jet suction ice mixing device according to claim 6, characterized in that, The hollow balancing part has a hollow frustum structure, and its diameter is reduced along the direction of gravity.

8. The perturbation-type local fluidization negative pressure jet-suction ice mixing device according to claim 1, characterized in that, The mixing chamber is equipped with at least one liquid nitrogen fluidizing tube string, and multiple liquid nitrogen nozzles are spaced apart on the liquid nitrogen fluidizing tube string along the guide line direction.

9. The perturbation-type local fluidization negative pressure jet-suction ice mixing device according to claim 8, characterized in that, The mixing chamber is provided with multiple liquid nitrogen fluidized tube strings at intervals. Along the guide line of the liquid nitrogen fluidized tube strings, multiple first liquid nitrogen nozzles are provided at intervals on the liquid nitrogen fluidized tube strings. A second liquid nitrogen nozzle is provided at the end of the liquid nitrogen fluidized tube strings. The nozzles of the multiple first liquid nitrogen nozzles are arranged away from the inner wall of the mixing chamber, and the nozzles of the second liquid nitrogen nozzles are arranged parallel to the end axis of the liquid nitrogen fluidized tube strings.

10. The perturbation-type local fluidization negative pressure jet-suction ice mixing device according to claim 9, characterized in that, The ice particle outflow chamber is equipped with a switch valve for controlling the outflow of ice particles.

11. The perturbation-type local fluidization negative pressure jet-suction ice mixing device according to claim 10, characterized in that, The ice mixing chamber is a closed, pressurized metal chamber with a movable cover connected to the inlet of the ice particle inflow chamber.

12. The perturbation-type local fluidization negative pressure jet-suction ice mixing device according to claim 1, characterized in that, The inner wall of the ice mixing chamber is coated with one of the following: polytetrafluoroethylene coating, polyethylene coating, polymethyl methacrylate coating, fluororubber coating, ceramic coating, and polyurethane coating.

13. The perturbation-type local fluidization negative pressure jet-suction ice mixing device according to claim 1, characterized in that, The outside of the ice mixing chamber is covered with an insulation layer.

14. A method of using a perturbation-type local fluidization negative pressure jet suction ice mixing device, characterized in that, The method of use is applicable to the perturbation-type local fluidization negative pressure jet suction ice mixing device as described in claim 11, and includes the following steps: Connect the movable cover to the outlet of the ice-making device, connect the outer interface of the liquid nitrogen fluidizing tube string to the liquid nitrogen supply line, connect the outer interface of the fluidizing tube column to the fluidizing gas source, connect the jet gas source pipe section to the ice spraying gas source, connect the Venturi tube section to the ice spraying line, and connect the end of the ice spraying line to a jet nozzle. Open the liquid nitrogen supply pipeline valve to pre-cool the ice mixing chamber and keep the temperature inside the ice mixing chamber below -100℃; Close the liquid nitrogen supply line valve. After the ice mixing chamber is completely depressurized, open the movable cover, transfer the ice particles prepared by the ice making device into the ice mixing chamber, and then close the movable cover. Turn on the fluidizing gas source in the fluidizing column, turn on the ice spraying gas source in the jet suction pipe, and simultaneously turn on the liquid nitrogen supply line valve. Open the switch valve, and the ice particles enter the jet suction pipe through the ice particle outlet chamber. Under the push of the ice spraying gas source and the adsorption of the Venturi tube section, they enter the ice spraying line and are finally sprayed out from the jet nozzle to form an ice particle air jet.

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