Air precooling ice particle blending integrated device and method of use thereof

Abstract

The application discloses an air precooling ice particle mixing integrated device and a use method thereof, which comprises a gas precooling chamber, a gas cooling pipe is arranged in the gas precooling chamber, the inlet of the gas cooling pipe extends from the top of the gas precooling chamber, the outlet of the gas cooling pipe extends from the bottom of the gas precooling chamber, and a gas medium for injection can pass through the gas cooling pipe; an ice particle mixing and conveying chamber is arranged in the gas precooling chamber, the bottom of the ice particle mixing and conveying chamber is provided with an ice particle outlet penetrating through the gas precooling chamber, and the top of the ice particle mixing and conveying chamber is provided with an ice particle inlet penetrating through the gas precooling chamber; and a mixing and injection mechanism is connected to the bottom end of the ice particle mixing and conveying chamber, and the mixing and injection mechanism is communicated with the ice particle outlet and the outlet of the gas cooling pipe respectively, and the mixing and injection mechanism has an injection outlet. The gas precooling chamber and the ice particle mixing and conveying chamber are integrated into a double-layer integrated structure, heat loss in the gas precooling chamber and the ice particle mixing and conveying chamber can be reduced to the maximum extent, and the processing quality of the ice particle injection flow is ensured.

Description

Technical Field

[0001] This invention relates to the field of abrasive air jet technology, and in particular to an integrated device for air precooling and mixing ice particles and its usage method. Background Technology

[0002] Abrasive air jetting is a technology developed based on sandblasting / shot blasting processes. Compared with traditional processing methods, abrasive air jetting can achieve better surface treatment results with less power, and has advantages such as a wide processing range, good adaptability, and easy control of surface precision. It is widely used in the removal of dirt, rust, and oxide layers from metal and non-metal surfaces, etching of electronic components, and cleaning and disinfection of medical and aerospace equipment. With the development of abrasive air jetting technology, the shortcomings of traditional abrasive jetting applications have become increasingly apparent. Currently, those skilled in the art are actively seeking greener, more economical abrasives with less environmental pollution, leading to the development of ice particle air jetting, a new green processing technology.

[0003] Ice particle air jet technology is a novel ship surface processing technology. Ice particles are typically prepared using a method of cryogenic sedimentation of atomized water droplets. This involves injecting atomized water droplets into an ultra-low temperature environment such as liquid nitrogen, followed by sedimentation cooling to obtain ultra-low temperature ice particles. Current processes often employ separate ice-making and ice-mixing chambers. The compressed air used as the power source is only dehydrated and cooled using a refrigerated dryer. Therefore, existing ice particle air jet equipment suffers from the following drawbacks: 1. It is difficult to transport ice particles from the ice-making chamber to the ice-mixing chamber, and melting ice particles can easily cause blockages; 2. The cooling effect of the compressed air after refrigerated drying is not ideal, leading to a decrease in ice particle hardness and compaction when driving the ice particles, affecting material removal efficiency; 3. It is difficult to monitor and adjust the compressed air temperature in real time. These technical problems have consistently hindered the development of ice particle air jet technology. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated air precooling and ice particle mixing device and its usage method. This integrated device integrates the gas precooling chamber and the ice particle mixing and conveying chamber into a double-layer integrated structure, which can minimize the heat loss in the gas precooling chamber and the ice particle mixing and conveying chamber and ensure the processing quality of the ice particle gas jet.

[0005] The above-mentioned objectives of this invention are mainly achieved by the following technical solutions:

[0006] On one hand, the present invention provides an integrated air precooling ice particle mixing device, which includes:

[0007] A gas precooling chamber is provided with a gas cooling pipe. The inlet of the gas cooling pipe extends from the top of the gas precooling chamber, and the outlet of the gas cooling pipe extends from the bottom of the gas precooling chamber. A gas medium for injection can pass through the gas cooling pipe.

[0008] An ice particle mixing and conveying chamber is located inside the gas precooling chamber. The bottom of the ice particle mixing and conveying chamber is provided with an ice particle outlet that penetrates the gas precooling chamber, and the top of the ice particle mixing and conveying chamber is provided with an ice particle inlet that penetrates the gas precooling chamber.

[0009] A mixing and injection mechanism is connected to the bottom end of the ice particle mixing and conveying chamber. The mixing and injection mechanism is connected to the ice particle outlet and the outlet of the gas cooling pipe, and the mixing and injection mechanism has an injection outlet.

[0010] In a preferred embodiment of the present invention, the ice particle mixing and conveying chamber is provided with a spiral conveying rod extending in its axial direction, and the spiral conveying rod has spiral blades.

[0011] In a preferred embodiment of the present invention, the mixing injection mechanism has an ice particle channel and a gas channel that are connected to each other. The ice particle channel is connected to the ice particle outlet, and the gas channel is connected to the outlet of the gas cooling pipe. The mixing injection mechanism also has a mixing injection channel that is connected to both the ice particle channel and the gas channel. The injection outlet is formed at the end of the mixing injection channel.

[0012] In a preferred embodiment of the present invention, an inlet valve is connected between the gas passage and the outlet of the gas cooling pipe.

[0013] In a preferred embodiment of the present invention, a motor is provided at the bottom of the mixing and spraying mechanism, and the lower end of the spiral conveying rod passes through the ice particle channel and is driven and connected to the motor.

[0014] In a preferred embodiment of the present invention, a first temperature sensor is provided in the gas precooling chamber, a second temperature sensor is provided on the side wall of the ice particle mixing and conveying chamber, and a third temperature sensor is provided in the gas cooling pipe.

[0015] In a preferred embodiment of the present invention, the gas cooling pipe is arranged in a spiral structure on the outside of the ice particle mixing chamber.

[0016] In a preferred embodiment of the present invention, the gas precooling chamber is further provided with a liquid nitrogen atomizing tube that can introduce liquid nitrogen into it. The liquid nitrogen atomizing tube is located outside the gas cooling tube and has a plurality of nozzles facing the gas cooling tube.

[0017] In a preferred embodiment of the present invention, the sidewall of the gas precooling chamber includes an inner sidewall and an outer sidewall, and a hollow cavity is formed between the inner sidewall and the outer sidewall.

[0018] In a preferred embodiment of the present invention, the sidewall of the ice particle mixing chamber is a single-layer structure, and its inner surface is coated with a polytetrafluoroethylene coating.

[0019] On the other hand, the present invention also provides a method of using an integrated air precooling ice particle mixing device, which is implemented using the integrated air precooling ice particle mixing device as described above, the method of use including:

[0020] The ice particle inlet of the ice particle mixing and conveying chamber is connected to the ice-making unit, the inlet of the gas cooling pipe is connected to the air compressor, and the injection outlet is connected to the injection operation unit.

[0021] The ice-making unit is turned on to introduce ice particles into the ice particle mixing chamber. The air compressor is turned on to introduce compressed air into the gas cooling pipe. The mixing and injection mechanism is turned on, and the compressed air is mixed with the ice particles and then ejected from the injection outlet.

[0022] According to a preferred embodiment of the present invention, the integrated air precooling ice particle mixing device comprises:

[0023] A first temperature sensor is installed in the gas precooling chamber, a second temperature sensor is installed on the side wall of the ice particle mixing and conveying chamber, and a third temperature sensor is installed in the gas cooling pipe. The gas precooling chamber is also equipped with a liquid nitrogen atomizing pipe that can introduce liquid nitrogen into it.

[0024] Before the step of introducing ice particles into the ice particle mixing chamber by turning on the ice-making unit, the inlet of the liquid nitrogen atomizing tube is connected to the pressurized liquid nitrogen tank, and the pressurized liquid nitrogen tank is turned on to cool the gas precooling chamber and the ice particle mixing chamber, so that their temperature is kept below -80°C.

[0025] The method of use also includes:

[0026] The temperature inside the gas precooling chamber, the temperature on the outer wall of the ice particle mixing and conveying chamber, and the temperature inside the gas cooling pipe are monitored in real time by the first temperature sensor, the second temperature sensor, and the third temperature sensor. Based on the measured temperature, the flow rate of liquid nitrogen in the liquid nitrogen atomizing pipe is adjusted to control the temperature of the gas precooling chamber and the ice particle mixing and conveying chamber to be kept below -80°C, and the gas temperature at the outlet of the gas cooling pipe to be kept below -10°C.

[0027] Compared with the prior art, the technical solution of the present invention has the following characteristics and advantages:

[0028] 1. The air precooling and ice particle mixing integrated device of the present invention integrates the gas precooling chamber and the ice particle mixing and conveying chamber into a double-layer integrated structure. Only a liquid nitrogen atomizing tube needs to be inserted into the gas precooling chamber to cool the outer wall of the gas cooling pipe and the ice particle mixing and conveying chamber, thereby realizing the precooling of compressed air and the insulation of ice particles in the ice particle mixing and conveying chamber, reducing the consumption of liquid nitrogen, and improving the efficiency of precooling and the practicality of insulation.

[0029] 2. The ice particle mixing and conveying chamber in this invention uses a single-layer metal outer wall surface for heat conduction and cooling, which can keep ultra-low temperature ice particles warm for a long time and meet the processing requirements of ice particle gas jet surface processing; its inner wall is coated with polytetrafluoroethylene to reduce the friction between ice particles and the wall surface to facilitate ice release.

[0030] 3. The gas precooling chamber in this invention utilizes a double-layer metal vacuum insulation chamber shell and an outer aluminum foil insulation layer, and employs a liquid nitrogen atomizing tube to precool the gas cooling tube. These multiple cooling methods can reduce the temperature of compressed air to below -10°C, avoiding the decrease in ice particle hardness and adhesion and compaction caused by compressed air driving ice particles at higher temperatures, thereby improving material removal efficiency.

[0031] 4. The first temperature sensor, the second temperature sensor, and the third temperature sensor in this invention monitor the temperature changes of the gas precooling chamber environment, the outer wall of the ice particle mixing conveyor, and the compressed air in the gas cooling pipe in real time. By adjusting the liquid nitrogen flow rate, the temperature is controlled, avoiding ice blockage caused by temperature changes. The long-term heat preservation of the ice particles also ensures the quality of jet processing.

[0032] 5. In this invention, the upper part of the gas cooling pipe is arranged in a spiral structure on the outside of the ice particle mixing and conveying chamber. Under the condition of a certain volume, the length of the gas cooling pipe is increased as much as possible, that is, the pre-cooling time of the gas is increased under the condition of constant displacement, so as to ensure the cooling effect of compressed air.

[0033] 6. This invention controls the amount of ice particles entering the horizontal pipe at the injection outlet by precisely controlling the rotation speed of the screw conveyor by the motor. The appropriate amount of mixed ice can be adjusted according to the processing requirements of cleaning different parts and structures on the ship's surface, which greatly improves the mixing and conveying efficiency of ice particles. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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. In the drawings:

[0035] Figure 1 This is a schematic diagram of the integrated air precooling ice particle mixing device of the present invention.

[0036] Explanation of icon numbers:

[0037] 10. Gas precooling chamber; 11. First temperature sensor;

[0038] 20. Ice particle mixing chamber; 21. Ice particle inlet; 22. Ice particle outlet; 23. Second temperature sensor;

[0039] 30. Mixing injection mechanism; 31. Injection outlet; 32. Ice particle channel; 33. Gas channel; 34. Mixing injection channel; 35. Intake valve;

[0040] 40. Gas cooling pipe; 41. Third temperature sensor;

[0041] 50. Screw conveyor rod; 51. Screw blade;

[0042] 60. Liquid nitrogen atomizing tube; 61. Nozzle;

[0043] 70. Electric motor; 71. Rotary seal;

[0044] X, axial direction. Detailed Implementation

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

[0046] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] Implementation Method 1:

[0049] like Figure 1 As shown, the present invention provides an integrated air precooling and ice particle mixing device, comprising: a gas precooling chamber 10, wherein a gas cooling pipe 40 is provided inside, the inlet of the gas cooling pipe 40 extends from the top of the gas precooling chamber 10, the outlet of the gas cooling pipe 40 extends from the bottom of the gas precooling chamber 10, and a jetting gas medium can be passed through the gas cooling pipe 40; an ice particle mixing and conveying chamber 20, located inside the gas precooling chamber 10, wherein an ice particle outlet 22 penetrating the gas precooling chamber 10 is provided at the bottom of the ice particle mixing and conveying chamber 20, and an ice particle inlet 21 penetrating the gas precooling chamber 10 is provided at the top of the ice particle mixing and conveying chamber 20; and a mixing and jetting mechanism 30, connected to the bottom end of the ice particle mixing and conveying chamber 20, wherein the mixing and jetting mechanism 30 is connected to the ice particle outlet 22 and the outlet of the gas cooling pipe 40 respectively, and the mixing and jetting mechanism 30 has a jetting outlet 31.

[0050] The air precooling and ice particle mixing integrated device of the present invention integrates the gas precooling chamber 10 and the ice particle mixing and conveying chamber 20 into a double-layer integrated structure, which can minimize the heat loss in the gas precooling chamber 10 and the ice particle mixing and conveying chamber 20 and ensure the processing quality of the ice particle gas jet.

[0051] Specifically, such as Figure 1 As shown, the gas precooling chamber 10 of the present invention is mainly used to insulate or further cool the gas cooling pipe 40 to prevent the air temperature inside the gas cooling pipe 40 from becoming too high. In this embodiment, the gas precooling chamber 10 is a cylindrical structure with an inverted conical structure at its lower end, and its interior is a sealed chamber.

[0052] A gas cooling pipe 40 is installed inside the gas precooling chamber 10 and located outside the ice particle mixing and conveying chamber 20. The inlet of the gas cooling pipe 40 passes through the cavity wall at the top of the gas precooling chamber 10, and the outlet of the gas cooling pipe 40 exits through a pre-reserved hole in the side wall at the bottom of the gas precooling chamber 10. The inlet of the gas cooling pipe 40 is used to connect to an air compressor. After being compressed, the air enters the gas cooling pipe 40 inside the gas precooling chamber 10, where it is further cooled and kept warm. Then, the air enters the mixing and injection mechanism 30 through the outlet of the gas cooling pipe 40 to mix with the ice particles.

[0053] According to one embodiment of the present invention, the sidewall of the gas precooling chamber 10 includes an inner sidewall and an outer sidewall, and a hollow cavity (not shown) is formed between the inner sidewall and the outer sidewall. By configuring the sidewall of the gas precooling chamber 10 as a double-layer vacuum insulation structure, heat loss within the gas precooling chamber 10 can be effectively reduced, thereby improving the insulation effect of the gas precooling chamber 10.

[0054] Furthermore, an aluminum foil insulation layer is covered on the outside of the gas precooling chamber 10 to further reduce heat loss in the gas precooling chamber 10, improve its insulation effect, and thus ensure that the air in the gas cooling pipe 40 is kept at a lower temperature.

[0055] According to one embodiment of the present invention, such as Figure 1 As shown, the gas precooling chamber 10 is also equipped with a liquid nitrogen atomizing pipe 60 that allows liquid nitrogen to be introduced into it. The liquid nitrogen atomizing pipe 60 is located outside the gas cooling pipe 40 and has multiple nozzles 61 facing the gas cooling pipe 40. The liquid nitrogen atomizing pipe 60 can spray atomized liquid nitrogen into the gas cooling pipe 40 to cool the air inside the gas cooling pipe 40.

[0056] Specifically, such as Figure 1 As shown, the inlet of the liquid nitrogen atomizing tube 60 is inserted through the cavity wall at the top of the gas precooling chamber 10, and its inlet is used to connect to the pressurized liquid nitrogen tank. The liquid nitrogen atomizing tube 60 extends along the axial direction X of the gas precooling chamber 10 and is located close to the side wall of the gas precooling chamber 10. Multiple nozzles 61 are spaced apart along the length of the liquid nitrogen atomizing tube 60, and the nozzles 61 are positioned towards the gas cooling tube 40, enabling the nozzles 61 to spray atomized liquid nitrogen onto the gas cooling tube 40. Multiple liquid nitrogen atomizing tubes 60 are spaced apart within the gas precooling chamber 10 along its circumference to enhance the cooling effect on the gas within the gas cooling tube 40.

[0057] According to one embodiment of the present invention, such as Figure 1 As shown, the gas cooling pipe 40 is arranged in a spiral structure on the outside of the ice particle mixing chamber 20. The length of the gas cooling pipe 40 is increased as much as possible while maintaining a fixed volume, that is, the pre-cooling time of the air inside the gas cooling pipe 40 is increased while keeping the displacement constant, to ensure the cooling effect of the air.

[0058] According to one embodiment of the present invention, such as Figure 1 As shown, a first temperature sensor 11 is provided in the gas precooling chamber 10. The first temperature sensor 11 can monitor the temperature in the gas precooling chamber 10 and adjust the flow rate of liquid nitrogen in the liquid nitrogen atomizing tube 60 in real time according to the temperature to avoid the temperature in the gas precooling chamber 10 from being too high.

[0059] Furthermore, such as Figure 1 As shown, a third temperature sensor 41 is provided inside the gas cooling pipe 40. The third temperature sensor 41 can monitor the temperature of the gas inside the gas cooling pipe 40 and adjust the flow rate of liquid nitrogen in the liquid nitrogen atomizing pipe 60 in real time according to its temperature to avoid the gas temperature inside the gas cooling pipe 40 from being too high.

[0060] like Figure 1As shown, the ice particle mixing chamber 20 of the present invention is disposed inside the gas precooling chamber 10. The ice particle mixing chamber 20 has a accommodating space for holding ice particles. The ice particle inlet 21 is located at the top of the ice particle mixing chamber 20 and extends through the cavity wall at the top of the gas precooling chamber 10. The ice particle inlet 21 is used to connect to the ice-making unit. The ice particle outlet 22 is located at the bottom of the ice particle mixing chamber 20 and extends through the bottom of the gas precooling chamber 10. The ice particle outlet 22 is used to connect to the mixing and spraying mechanism 30. In this embodiment, the ice particle mixing chamber 20 and the gas precooling chamber 10 are coaxially arranged. The ice particle mixing chamber 20 is a cylindrical structure, with its lower end configured as an inverted cone shape.

[0061] In this invention, the ice particle mixing chamber 20 is located inside the gas precooling chamber 10. The liquid nitrogen atomizing tube 60 in the gas precooling chamber 10 can cool the gas in the gas cooling tube 40 while also cooling the ice particle mixing chamber 20, so that the ice particle mixing chamber 20 can also be maintained at a low temperature. The integrated structure of the ice particle mixing chamber 20 and the gas precooling chamber 10 in this invention reduces the consumption of liquid nitrogen and improves the efficiency of precooling and the practicality of heat preservation.

[0062] According to one embodiment of the present invention, such as Figure 1 As shown, the ice particle mixing and conveying chamber 20 is provided with a spiral conveying rod 50 extending along its axial direction X, and the spiral conveying rod 50 has spiral blades 51. The spiral conveying rod 50 in this invention can greatly improve the efficiency of conveying ice particles in the ice particle mixing and conveying chamber 20 to the mixing and spraying mechanism 30.

[0063] Specifically, such as Figure 1 As shown, a motor 70 is provided at the bottom of the mixing and spraying mechanism 30. The lower end of the spiral conveying rod 50 passes through the mixing and spraying mechanism 30 and is driven by the motor 70. The motor 70 can drive the spiral conveying rod 50 to rotate. The ice particles are conveyed downward under the drive of the spiral blade 51. A rotary seal 71 is provided at the connection between the motor 70 and the spiral conveying rod 50. The rotary seal 71 can improve the sealing strength between the motor 70 and the spiral conveying rod 50.

[0064] By controlling the motor 70, the rotation speed of the screw conveyor 50 can be precisely controlled, thereby controlling the amount of ice particles fed into the mixing and spraying mechanism 30. In practical applications, the appropriate amount of mixed ice can be adjusted according to the processing requirements of cleaning different parts and structures on the surface of the ship.

[0065] Furthermore, the upper end of the spiral blade 51 of the spiral conveyor 50 is located at the top of the inverted conical section of the ice particle mixing chamber 20. When rotating, it can prevent the ice particles in the ice particle mixing chamber 20 from sticking and compacting. It has good operational stability and low failure rate. Therefore, setting a longer spiral blade 51 can improve the mixing efficiency of ice particles to a certain extent.

[0066] According to one embodiment of the present invention, the sidewall of the ice particle mixing and conveying chamber 20 is a single-layer structure, and its inner surface is coated with a polytetrafluoroethylene coating. The outer wall of the single-layer metal has good thermal conductivity, and the liquid nitrogen in the gas precooling chamber 10 can provide long-term insulation for the ice particles in the ice particle mixing and conveying chamber 20, so that the ice particles can meet the processing requirements of ice particle gas jet surface processing; the inner wall is coated with a polytetrafluoroethylene coating, which can reduce the friction between the ice particles and the inner wall surface of the ice particle mixing and conveying chamber 20, thereby facilitating the downward conveying of ice particles.

[0067] According to one embodiment of the present invention, a second temperature sensor 23 is provided on the side wall of the ice particle mixing chamber 20. The second temperature sensor 23 can monitor the temperature of the side wall of the ice particle mixing chamber 20 and adjust the flow rate of liquid nitrogen in the liquid nitrogen atomizing tube 60 in real time according to its temperature to avoid the temperature of the ice particles in the ice particle mixing chamber 20 becoming too high.

[0068] like Figure 1 As shown, the mixing and injection mechanism 30 of this invention is connected to the lower end of the gas precooling chamber 10, mainly to mix high-pressure air and ice particles to form an ice particle gas jet. In this embodiment, the mixing and injection mechanism 30 and the gas precooling chamber 10 are an integrated structure, manufactured as a single piece; in other embodiments of this invention, the mixing and injection mechanism 30 can also be a separate component, which can be fixed to the lower end of the gas precooling chamber 10 by bolts or other means.

[0069] Specifically, such as Figure 1 As shown, the mixing and injection mechanism 30 has an interconnected ice particle channel 32 and a gas channel 33. The ice particle channel 32 is connected to the ice particle outlet 22 and is coaxially arranged with the ice particle mixing and conveying chamber 20. The screw conveyor 50 passes through the ice particle outlet 22 and the ice particle channel 32, and is connected to the motor 70 at the lower end of the ice particle channel 32. The gas channel 33 is connected to the outlet of the gas cooling pipe 40 and has an "L"-shaped structure. An intake valve 35 is connected between the inlet of the gas channel 33 and the outlet of the gas cooling pipe 40, which can control the connection between the gas channel 33 and the gas cooling pipe 40. The outlets of the ice particle channel 32 and the gas channel 33 converge, and under the action of high-pressure air, the ice particles and high-pressure air are initially mixed.

[0070] The mixing and spraying mechanism 30 also has a mixing and spraying channel 34, which is connected to both the ice particle channel 32 and the gas channel 33. The mixing and spraying channel 34 is located at the confluence of the outlets of the ice particle channel 32 and the gas channel 33 and is coaxially arranged with the outlet of the gas channel 33. The mixed ice particles and air enter the mixing and spraying channel 34 for further mixing and are then ejected from the spraying outlet 31 at the end of the mixing and spraying channel 34. The spraying outlet 31 is used to connect to the spraying operation unit, which is directly used for surface treatment operations.

[0071] Implementation Method Two:

[0072] The present invention also provides a method of using an integrated air precooling ice particle mixing device, which is implemented using the integrated air precooling ice particle mixing device described in Embodiment 1. The method of use includes:

[0073] Step S1: Connect the ice particle inlet 21 of the ice particle mixing and conveying chamber 20 to the ice making unit, connect the inlet of the gas cooling pipe 40 to the air compressor, and connect the injection outlet 31 to the injection operation unit.

[0074] Step S2: Turn on the ice-making unit to introduce ice particles into the ice particle mixing chamber 20, turn on the air compressor to introduce compressed air into the gas cooling pipe 40, turn on the mixing injection mechanism 30, and after the compressed air and ice particles are mixed, they are sprayed out from the injection outlet 31.

[0075] Specifically, the ice-making unit can continuously transport the manufactured ice particles into the ice particle mixing chamber 20, and the air compressor can continuously supply compressed air into the gas cooling pipe 40. The spiral conveyor rod 50 and the air inlet valve 35 are opened, and the mixed ice particle air jet enters the spraying operation unit for surface treatment.

[0076] Furthermore, prior to step S2, the inlet of the liquid nitrogen atomizing tube 60 is connected to the pressurized liquid nitrogen tank, and the pressurized liquid nitrogen tank is turned on to cool the gas precooling chamber 10 and the ice particle mixing chamber 20, keeping their temperature below -80°C. By continuously introducing atomized liquid nitrogen into the gas precooling chamber 10 and the ice particle mixing chamber 20, it is ensured that they can be maintained at a low temperature.

[0077] According to one embodiment of the present invention, the method of use further includes:

[0078] Step S3: The temperature inside the gas precooling chamber 10, the temperature of the outer wall of the ice particle mixing and conveying chamber 20, and the temperature inside the gas cooling pipe 40 are monitored in real time by the first temperature sensor 11, the second temperature sensor 23, and the third temperature sensor 41. The flow rate of liquid nitrogen in the liquid nitrogen atomizing pipe 60 is adjusted according to the measured temperature to control the temperature of the gas precooling chamber 10 and the ice particle mixing and conveying chamber 20 to be kept below -80℃, and the temperature of the gas at the outlet of the gas cooling pipe 40 to be kept below -10℃. This avoids the high temperature of compressed air driving the ice particles, which would cause the ice particles to decrease in hardness and stick together and compact, thereby affecting the efficiency of the surface treatment operation.

[0079] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An integrated air precooling ice particle mixing device, characterized in that, include: A gas precooling chamber is provided with a gas cooling pipe. The inlet of the gas cooling pipe extends from the top of the gas precooling chamber, and the outlet of the gas cooling pipe extends from the bottom of the gas precooling chamber. A jetting gas medium can be passed through the gas cooling pipe. The gas precooling chamber is also provided with a liquid nitrogen atomizing pipe that can pass liquid nitrogen into it. The liquid nitrogen atomizing pipe is located outside the gas cooling pipe and has multiple nozzles facing the gas cooling pipe. An ice particle mixing and conveying chamber is located inside the gas precooling chamber. The bottom of the ice particle mixing and conveying chamber is provided with an ice particle outlet that penetrates the gas precooling chamber, and the top of the ice particle mixing and conveying chamber is provided with an ice particle inlet that penetrates the gas precooling chamber. A mixing and injection mechanism is connected to the bottom end of the ice particle mixing and conveying chamber. The mixing and injection mechanism is connected to the ice particle outlet and the outlet of the gas cooling pipe, and the mixing and injection mechanism has an injection outlet. The ice particle mixing and conveying chamber is provided with a spiral conveying rod extending along its axial direction, and the spiral conveying rod has spiral blades; The mixing injection mechanism has an ice particle channel and a gas channel that are connected to each other. The ice particle channel is connected to the ice particle outlet, and the gas channel is connected to the outlet of the gas cooling pipe. The mixing injection mechanism also has a mixing injection channel that is connected to both the ice particle channel and the gas channel. The injection outlet is formed at the end of the mixing injection channel. The injection outlet is used to connect to the injection operation unit. The sidewall of the gas precooling chamber includes an inner sidewall and an outer sidewall, and a hollow cavity is formed between the inner sidewall and the outer sidewall; The sidewall of the ice particle mixing chamber has a single-layer structure, and its inner surface is coated with a polytetrafluoroethylene coating.

2. The integrated air precooling ice particle mixing device according to claim 1, characterized in that, An inlet valve is connected between the gas passage and the outlet of the gas cooling pipe.

3. The integrated air precooling ice particle mixing device according to claim 1, characterized in that, The bottom of the mixing jetting mechanism is equipped with a motor, and the lower end of the spiral conveying rod passes through the ice particle channel and is driven by the motor.

4. The integrated air precooling ice particle mixing device according to claim 1, characterized in that, A first temperature sensor is provided in the gas precooling chamber, a second temperature sensor is provided on the side wall of the ice particle mixing and conveying chamber, and a third temperature sensor is provided inside the gas cooling pipe.

5. The integrated air precooling ice particle mixing device according to claim 1, characterized in that, The gas cooling pipe is spirally arranged on the outside of the ice particle mixing chamber.

6. A method of using an integrated air precooling ice particle mixing device, characterized in that, The method of using the integrated air precooling ice particle mixing device as described in any one of claims 1-5 includes: The ice particle inlet of the ice particle mixing and conveying chamber is connected to the ice-making unit, the inlet of the gas cooling pipe is connected to the air compressor, and the injection outlet is connected to the injection operation unit. The ice-making unit is turned on to introduce ice particles into the ice particle mixing chamber. The air compressor is turned on to introduce compressed air into the gas cooling pipe. The mixing and injection mechanism is turned on, and the compressed air is mixed with the ice particles and then ejected from the injection outlet.

7. The method of using the integrated air precooling ice particle mixing device according to claim 6, characterized in that, The integrated air precooling ice particle mixing device includes: A first temperature sensor is installed in the gas precooling chamber, a second temperature sensor is installed on the side wall of the ice particle mixing and conveying chamber, and a third temperature sensor is installed inside the gas cooling pipe. Before the step of introducing ice particles into the ice particle mixing chamber by turning on the ice-making unit, the inlet of the liquid nitrogen atomizing tube is connected to the pressurized liquid nitrogen tank, and the pressurized liquid nitrogen tank is turned on to cool the gas precooling chamber and the ice particle mixing chamber, so that their temperature is kept below -80°C. The method of use also includes: The temperature inside the gas precooling chamber, the temperature on the outer wall of the ice particle mixing and conveying chamber, and the temperature inside the gas cooling pipe are monitored in real time by the first temperature sensor, the second temperature sensor, and the third temperature sensor. Based on the measured temperature, the flow rate of liquid nitrogen in the liquid nitrogen atomizing pipe is adjusted to control the temperature of the gas precooling chamber and the ice particle mixing and conveying chamber to be kept below -80°C, and the gas temperature at the outlet of the gas cooling pipe to be kept below -10°C.

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