Ultrahigh-pressure low-temperature fluid injection system

Abstract

The utility model provides an ultrahigh-pressure low-temperature fluid injection system, and particularly relates to the technical field of low-temperature equipment, the ultrahigh-pressure low-temperature fluid injection system comprises a supply system and an injection system, the supply system comprises a supply unit, a subcooler, a supercharger, an energy accumulator and a heat exchanger; the injection system comprises a nozzle unit and a recovery unit; the supply unit is sequentially connected with the subcooler, the supercharger, the energy accumulator, the heat exchanger and the nozzle unit through pipelines, fluid in the supply unit sequentially passes through the subcooler, the supercharger and the energy accumulator and is subjected to subcooling, supercharging, energy storage and cooling, stable high-pressure low-temperature fluid is obtained, and finally the fluid is sprayed out of the nozzle unit to machine an object. According to the utility model, the stable high-pressure low-temperature fluid is utilized to treat the object, and finally the impurities are recovered and treated, so that the secondary pollution can be reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cryogenic equipment, in particular to a super high pressure cryogenic fluid injection system. Background Art

[0002] After the end of the energy of a nuclear power plant, operations such as purification and demolition are required, and the operations are very complex, long and expensive. One of the most important stages is the decontamination of concrete. Due to the huge amount of concrete in the nuclear power plant, its decontamination will have a great impact on costs and planning. The choice of decontamination measures depends on the type and level of contamination, the size and accessibility of the module to be purified, the waste management policy and cost, etc.

[0003] In the prior art, mechanical tools such as disc sanders, hand hammers, water sprayers, planers, etc. are usually used to purify the nuclear surface. At present, these mechanical techniques have been successfully used to purify the nuclear surface. However, when purifying and demolishing nuclear facilities, the secondary pollution generated by treating the purified water and the cost of treating liquid waste are increasing continuously.

[0004] In view of this, the utility model proposes a super high pressure cryogenic fluid injection system which can effectively recover and separate dust, debris, cryogenic gas, etc. generated by the treated object to avoid secondary pollution. Summary of the Utility Model

[0005] In order to solve the problem of easy generation of secondary pollution when treating purified water, the utility model proposes a super high pressure cryogenic fluid injection system.

[0006] The utility model is realized through the following technical solutions:

[0007] The utility model proposes that the super high pressure cryogenic fluid injection system includes a supply system and an injection system, wherein:

[0008] The supply system includes a supply unit, a subcooler, a booster, an accumulator and a heat exchanger;

[0009] The injection system includes a nozzle unit and a recovery unit;

[0010] The supply unit is sequentially connected to the subcooler, the booster, the accumulator, the heat exchanger and the nozzle unit through pipelines. The recovery unit is arranged on the outlet side of the nozzle unit. The recovery unit includes a shell cover, a vacuum pump group and a cyclone separation module. The recovery unit is used for classifying and recovering impurities. The fluid in the supply unit sequentially passes through the subcooler, the booster, the accumulator and undergoes subcooling, boosting, energy storage, temperature reduction and obtains a stable high-pressure cryogenic fluid, and finally sprays out from the nozzle unit to process an object, and the impurities are recovered and processed through the recovery unit.

[0011] Further, the supply system further includes a relief valve group, which is arranged on the pipeline between the supercharger and the subcooler, and is used for discharging the gas in the pipeline.

[0012] Further, the supply unit further includes a unloading valve group, which is arranged on the pipeline between the nozzle unit and the heat exchanger, and the unloading valve is used to control the pressure of the pipeline.

[0013] Further, it further includes a power system, and the power system is respectively connected to the relief valve group, the supercharger, the unloading valve group, the nozzle unit and the recovery unit.

[0014] Further, it further includes a control system, and the control system is used to control the supply system and the injection system.

[0015] Further, the nozzle unit further includes a positioning module and a nozzle, the positioning module is connected to the control system and controls the position of the nozzle.

[0016] Further, the injection system further includes a sandblasting unit, and the sandblasting unit cooperates with the nozzle unit and mixes particles into the nozzle.

[0017] Advantages of the present utility model:

[0018] (1) The ultra-high pressure and low temperature fluid injection system proposed by the present utility model uses a subcooler, a supercharger, an accumulator and a heat exchanger to supercool, pressurize, store energy and cool down the low temperature fluid. Cooperating with the unloading valve group and the relief components can ensure the stable pressurization and injection of the low temperature fluid. It can also cut water-soluble materials, improve the decontamination and decommissioning treatment speed of nuclear facilities, reduce the treatment cost. Finally, the recovery unit classifies and recovers impurities, which can reduce secondary pollution and cost.

[0019] (2) The ultra-high pressure and low temperature fluid injection system proposed by the present utility model is also provided with a sandblasting unit. When the nozzle injects high-pressure and low-temperature fluid, the sandblasting unit can mix particles to optimize the process. When processing the outer surface of a vehicle that needs to withstand severe flight conditions inside and outside the atmosphere, it can make the surface roughness of the outer coating of the entire aerospace vehicle deeper, and there will be no discontinuous crack situation. Description of the Drawings

[0020] Figure 1 It is the overall structure diagram of the ultra-high pressure and low temperature fluid injection system of the present utility model;

[0021] In the figure: supply unit 1, subcooler 2, relief valve group 3, supercharger 4, accumulator 5, heat exchanger 6, unloading valve group 7, nozzle unit 8, recovery unit 9, power system 10, control system 11;

[0022] For the realization, functional features and advantages of the present utility model, they will be further described in conjunction with embodiments with reference to the accompanying drawings. Specific Embodiments

[0023] In order to more clearly and completely illustrate the technical solution of the present utility model, the present utility model will be further described below with reference to the accompanying drawings.

[0024] Please refer to Figure 1 , the present utility model provides a super-high pressure and low-temperature fluid injection system including a supply system and an injection system, wherein:

[0025] The supply system includes a supply unit 1, a subcooler 2, a booster 4, an accumulator 5 and a heat exchanger 6;

[0026] The injection system includes a nozzle unit 8 and a recovery unit 9;

[0027] The supply unit 1 is sequentially connected to the subcooler 2, the booster 4, the accumulator 5, the heat exchanger 6 and the nozzle unit 8 through pipelines. The recovery unit 9 is arranged on the outlet side of the nozzle unit 8. The recovery unit 9 includes a housing, a vacuum pump group and a cyclone separation module. The recovery unit 9 is used for classifying and recovering impurities. The fluid in the supply unit 1 sequentially passes through the subcooler 2, the booster 4, the accumulator 5 and undergoes subcooling, boosting, energy storage, temperature reduction to obtain a stable high-pressure and low-temperature fluid, and finally sprays from the nozzle unit 8 to process an object, and the impurities are recovered and processed through the recovery unit 9.

[0028] In this embodiment:

[0029] The supply unit 1 is used to provide low-temperature fluid;

[0030] The subcooler 2 is used to increase the subcooling degree of the low-temperature fluid;

[0031] The booster 4 is used to boost the low-temperature fluid;

[0032] The accumulator 5 is used to provide a storage space for the boosted subcooled low-temperature fluid and store energy;

[0033] The heat exchanger 6 is used to further cool the low-temperature fluid;

[0034] The nozzle unit 8 is used to inject the low-temperature fluid;

[0035] In a specific embodiment, a cryogenic fluid such as liquid nitrogen, liquid carbon dioxide, etc. first passes through a subcooler 2 to increase the subcooling degree, then is pressurized in the pressurizing chamber of a supercharger 4, and enters an accumulator 5 for storage and energy accumulation. It is further cooled by a heat exchanger 6, and finally is sprayed onto an object to be processed through a nozzle unit 8. After the spraying process, the generated cryogenic gas, dust, particulate matter, etc. will enter a recovery system for classification treatment, reducing secondary pollution to the construction site and lowering costs. Among them, the subcooler 2 increasing the subcooling degree can reduce the vaporization rate of the cryogenic fluid during the compression process in the pressurizing chamber of the supercharger 4. Before the device operates, the entire device needs to be precooled, especially the pressurizing chamber of the supercharger 4, to prevent the cryogenic fluid from instantly vaporizing when flowing through the pipeline, forming dead spaces in the pressurizing chamber and the pipeline. The accumulator 5 is a container that can withstand the corresponding pressure. When the pressurized cryogenic fluid directly acts on the object to be processed, pressure fluctuations are likely to occur, resulting in a decrease in processing accuracy. Therefore, the accumulator 5 is provided to accommodate the cryogenic fluid. Since the object to be processed is generally far from the outlet of the accumulator 5, high-pressure cryogenic adiabatic pipelines are needed to transport the pressurized high-pressure cryogenic fluid to the location of the object to be processed. And because heat leakage may occur during the transmission process, causing temperature rise, the heat exchanger 6 is provided for further cooling. Finally, the heat-exchanged high-pressure cryogenic fluid passes through the nozzle unit 8 to reach the object to be processed and perform cutting and surface treatment on it. The high-pressure cryogenic fluid system provided by the present invention can purify the nuclear surface, and at the same time, impurities can be classified and recycled through a recovery unit 9, reducing secondary pollution and lowering costs.

[0036] Further, the supply system further includes a relief valve group 3. The relief valve group 3 is disposed on the pipeline between the supercharger 4 and the subcooler 2, and the relief valve group 3 is used to discharge the gas in the pipeline.

[0037] In a specific embodiment, the relief valve group 3 can discharge the gas in the pipeline to ensure that the cryogenic liquid can smoothly enter the pressurizing chamber of the supercharger 4, and at the same time, it can also prevent the gas from forming dead spaces in the pressurizing chamber and the pipeline.

[0038] Further, the supply unit 1 further includes a pressure relief valve group 7. The pressure relief valve group 7 is disposed on the pipeline between the nozzle unit 8 and the heat exchanger 6, and the pressure relief valve is used to control the pressure of the pipeline.

[0039] In a specific embodiment, the high-pressure cryogenic fluid in the heat exchanger 6 flows through the pressure relief valve group 7 into the nozzle unit 8, and the pressure relief valve group 7 can be used for pressure relief and pressure loading.

[0040] Further, it further includes a power system 10. The power system 10 is respectively connected to the relief valve group 3, the supercharger 4, the pressure relief valve group 7, the nozzle unit 8, and the recovery unit 9.

[0041] In this embodiment:

[0042] The power system 10 is used to provide power

[0043] In a specific embodiment, the power system 10 powers the pressure relief valve group 3, the unloading valve group 7, the supercharger 4, the nozzle unit 8, the recovery unit 9, and the control system 11, including the air source for the valves and the power for the electrical components.

[0044] Further, a control system 11 is further included, and the control system 11 is used to control the supply system and the injection system.

[0045] In a specific embodiment, the control system 11 can set and control programs, and comprehensively control the entire processing technology, including the opening and closing processes of the pressure relief valve group 3 and the unloading valve group 7, as well as the opening and closing, processing routes, and process control of the nozzle unit 8.

[0046] Further, the nozzle unit 8 further includes a positioning module and a nozzle, and the positioning module is connected to the control system 11 and controls the position of the nozzle.

[0047] In a specific embodiment, the nozzle unit 8 has high-strength nozzles and a multi-positioning system matching the nozzles. The control system 11 cooperates with the positioning module and controls the nozzle to perform positioning spraying.

[0048] Further, the injection system further includes a sandblasting unit, and the sandblasting unit cooperates with the nozzle unit 8 and incorporates particles into the nozzle.

[0049] In a specific embodiment, the sandblasting unit can incorporate special particles while injecting high-pressure low-temperature fluid, optimizing the processing technology;

[0050] The aerospace industry needs to develop high-performance composite materials to withstand the severe flight conditions inside and outside the atmosphere. The main technical means is to spray special materials on the surface of the aircraft. Surface treatment plays a key role in the adhesion of cold spraying, and the quality of the adhesion performance of the cold-sprayed coating depends on the quality of the substrate. Before spraying, the material surface needs to meet specific requirements. Sandblasting is a conventional surface treatment method before cold spraying, and this method will cause the following problems. First, the surface roughness of the material is relatively shallow, which cannot strengthen the bonding between the coating material and the substrate. Second, the particulate material is embedded in the substrate material, resulting in discontinuous cracks in the coating material, etc., causing loss of the substrate material;

[0051] And the present utility model can be used for the treatment and peeling of the outer coating surface of aerospace vehicles. By using the sandblasting unit to cooperate with the nozzle to inject high-pressure low-temperature fluid, the particles can optimize the process, making the surface roughness of the entire outer coating surface of the aerospace vehicle deeper, and at the same time, there will be no situation of discontinuous cracks.

[0052] In one embodiment, the utility model uses a subcooler 2, a supercharger 4, an accumulator 5, and a heat exchanger 6 to subcool, supercharge, store energy, and cool down the low-temperature fluid. Cooperating with a unloading valve group 7 and a bleeding component can ensure the stable supercharging and injection of the low-temperature fluid, can also cut water-soluble materials, and at the same time can improve the decontamination and decommissioning treatment speed of nuclear facilities and reduce the treatment cost.

[0053] Certainly, the utility model can also have many other implementation manners. Based on this implementation manner, other implementation manners obtained by ordinary technicians in this field without any creative labor belong to the scope protected by the utility model.

Claims

1. A ultra-high pressure and low temperature fluid injection system, characterized in that It includes a supply system and an injection system, wherein: The supply system includes a supply unit, a subcooler, a supercharger, an accumulator and a heat exchanger; The injection system includes a nozzle unit and a recovery unit; The supply unit is sequentially connected to the subcooler, the supercharger, the accumulator, the heat exchanger and the nozzle unit through pipelines. The recovery unit is arranged on the outlet side of the nozzle unit. The recovery unit includes a housing, a vacuum pump group and a cyclone separation module. The recovery unit is used for classifying and recovering impurities.

2. The ultra-high pressure and low temperature fluid injection system according to claim 1, wherein The supply system further includes a relief valve group, which is arranged on the pipeline between the supercharger and the subcooler and is used for discharging the gas in the pipeline.

3. The ultra-high pressure and low temperature fluid injection system according to claim 2, wherein The supply unit further includes an unloading valve group, which is arranged on the pipeline between the nozzle unit and the heat exchanger. The unloading valve is used for controlling the pressure of the pipeline.

4. The ultra-high pressure and low temperature fluid injection system according to claim 3, wherein, It further includes a power system, which is respectively connected to the relief valve group, the supercharger, the unloading valve group, the nozzle unit and the recovery unit.

5. The ultra-high pressure and low temperature fluid injection system according to claim 1, characterized in that, It further includes a control system, which is used for controlling the supply system and the injection system.

6. The ultra-high pressure and low temperature fluid injection system according to claim 5, characterized in that, The nozzle unit further includes a positioning module and a nozzle. The positioning module is connected to the control system and controls the position of the nozzle.

7. The ultra-high pressure and low temperature fluid injection system according to claim 6, wherein The injection system further includes a sandblasting unit, which cooperates with the nozzle unit and incorporates particles into the nozzle.

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