Cooling device and water vapor compression equipment

Abstract

The utility model discloses a cooling device and water vapor compression equipment. The cooling device comprises a cooling tank, an air inlet pipe, an air outlet pipe and a water supply and drainage assembly, the cooling tank is provided with a containing cavity used for containing water, one end of the air inlet pipe is used for receiving steam output by upstream equipment, the other end of the air inlet pipe extends into the containing cavity, one end of the air outlet pipe is connected with the cooling tank, and the other end of the air outlet pipe is used for outputting steam to downstream equipment. And the water quantity in the accommodating cavity is adjusted. According to the technical scheme, the compression power consumption of the water vapor compression equipment can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of steam compression, and particularly relates to a cooling device and a steam compression device. Background Art

[0002] Reducing industrial carbon emissions is a key link in China's goal of achieving carbon neutrality. Industrial high-temperature heat pumps recover industrial waste heat to replace boilers to directly produce high-temperature and high-pressure steam, improving energy utilization efficiency and significantly reducing energy consumption. To meet the thermal energy requirements of large-capacity and high-temperature steam, a steam high-temperature centrifugal heat pump can be used to recover waste heat. First, low-temperature and low-pressure steam is generated, and then the steam compressor compresses the low-temperature and low-pressure steam into high-temperature and high-pressure steam. However, the exhaust temperature after steam compression is very high, and the superheat degree is very large, making it easy to become superheated steam. Superheated steam has a higher temperature and requires higher material requirements. Moreover, compared with saturated steam, superheated steam has a worse heat transfer effect. Therefore, in actual use, it is necessary to cool down the superheated steam.

[0003] In related technologies, spray cooling is the most widely used direct cooling method. However, the outlet of spray cooling generally still has a certain degree of superheat and is difficult to accurately control to the saturated state. The compression power consumption of superheated steam is higher than that of saturated steam, which limits the performance of the compressor and reduces the compression efficiency. Utility Model Content

[0004] The embodiments of the present application provide a cooling device and a steam compression device, which can reduce the compression power consumption of the steam compression device.

[0005] In a first aspect, the embodiments of the present application propose a cooling device, including a cooling tank, an inlet pipe, an outlet pipe, and a water supply and drainage component;

[0006] The cooling tank has a containing cavity for holding water. One end of the inlet pipe is used to receive the steam output by the upstream device, and the other end extends into the containing cavity and is used to discharge the steam into the water. One end of the outlet pipe is connected to the cooling tank, and the other end is used to output the steam to the downstream device;

[0007] The water supply and drainage component is connected to the cooling tank to adjust the water volume in the containing cavity.

[0008] In an embodiment, the inlet pipe includes a shunt device, and the shunt device is used to be immersed in water and has a plurality of shunt air ports arranged at intervals.

[0009] In an embodiment, the plurality of shunt air ports are located on the same horizontal plane; and / or,

[0010] Along the height direction of the cooling tank, the opening direction of the shunt air ports is set upward.

[0011] In one embodiment, it further includes a gas-liquid separation component, and the gas-liquid separation component is arranged in the accommodation cavity and above the water surface.

[0012] In one embodiment, the air outlet pipe communicates with the accommodation cavity from the top of the cooling tank. The gas-liquid separation component includes a first separation member and a second separation member. The first separation member is above the water surface, and the second separation member is above the first separation member.

[0013] In one embodiment, the first separation member includes a plurality of flow guide plates. The plurality of flow guide plates define an air passage for the vapor to pass through. The flow guide plates are used to guide the liquid attached to the flow guide plates to fall back. The flow guide plates have corrugated portions, and the corrugated portions are arranged at an angle with the vapor flow path; and / or,

[0014] The second separation member is a wire mesh.

[0015] In one embodiment, it further includes a gas-liquid separation device. The air outlet pipe includes a first pipe section and a second pipe section. One end of the first pipe section is connected to the cooling tank, and the other end is connected to the separation tank. One end of the second pipe section is connected to the separation tank, and the other end is used to output vapor to downstream equipment.

[0016] In one embodiment, the gas-liquid separation device includes:

[0017] A separation tank, connected to the first pipe section and the second pipe section;

[0018] A gas-liquid separation component, arranged in the separation tank; and

[0019] A return pipe, one end of which is connected to the separation tank and the other end is connected to the cooling tank to be used for returning the water in the separation tank to the cooling tank, and a return valve for controlling the on-off of the flow path in the return pipe is provided on the return pipe.

[0020] In one embodiment, the gas-liquid separation component includes a first separation member and a second separation member. The first separation member is above the water surface, and the second separation member is above the first separation member.

[0021] In one embodiment, the first separation member includes a plurality of flow guide plates. The plurality of flow guide plates define an air passage for the vapor to pass through. The flow guide plates are used to guide the liquid attached to the flow guide plates to fall back. The flow guide plates have corrugated portions, and the corrugated portions are arranged at an angle with the vapor flow path; and / or

[0022] The second separation member is a wire mesh.

[0023] In the second aspect of the embodiments of the present application, a water vapor compression device is proposed, including:

[0024] At least two compressors connected in series;

[0025] The cooling device according to any one of the above;

[0026] A detection component configured to detect the superheat degree of the vapor at one end of the air outlet pipe connected to the compressor; and

[0027] A controller, which is respectively in signal connection with the detection component and the water supply and drainage component, and is configured to adjust the water volume in the accommodation cavity based on the superheat degree of the vapor and a preset superheat degree until the superheat degree of the vapor is equal to the preset superheat degree.

[0028] In one embodiment, the detection component includes a pressure sensor and a temperature sensor. The pressure sensor is installed inside the air outlet pipe, and the temperature sensor is installed inside the air outlet pipe and is located at one end of the air outlet pipe connected to the compressor.

[0029] In one embodiment, the water supply and drainage component includes a liquid level sensor, a water supply pipe, a water pump, a drain pipe, and a drain valve. At least part of the liquid level sensor is located inside the accommodation cavity. The water supply pipe and the drain pipe are connected to the cooling tank. The water pump is connected to the water supply pipe. The drain valve is connected to the drain pipe. The liquid level sensor, the water pump, and the drain valve are all in signal connection with the controller; and / or,

[0030] The water supply and drainage component includes an overflow pipe. The overflow pipe communicates with the accommodation cavity from the side wall of the cooling tank to keep the water level in the accommodation cavity not higher than the connection point of the overflow pipe and the accommodation cavity.

[0031] Based on the above embodiments, in the embodiments of the present application, the vapor is cooled by water bath through the cooling device. The vapor discharged from the upstream device is introduced into the water through the air inlet pipe. The flow rate of the vapor entering the water drops suddenly, so that the retention time of the vapor in the water can be extended, and the vapor can fully exchange heat with the water in the accommodation cavity to ensure the cooling effect. The cooled vapor flows to the downstream device through the air outlet pipe. By adjusting the water volume in the accommodation cavity, the superheat degree of the vapor at one end of the air outlet pipe connected to the downstream device can meet the preset superheat degree, so as to flexibly adjust the cooling effect of the vapor, facilitate the further compression process of the vapor by the downstream device, and reduce power consumption.

[0032] For the form of spray cooling used in the related art, the embodiment of the present application does not require high-pressure spraying, saving the cost of high-pressure water pumps, and does not require high-precision nozzles, so there is no need to worry about nozzle wear affecting the heat exchange effect. The cooling effect is more stable and reliable, and the cost is lower. Moreover, in the embodiment of the present application, the steam is directly discharged into the water in the accommodation cavity, which can relieve the thermal stress caused by the thermal shock to the cooling device. And the tank body of the cooling tank has a larger volume compared with the spray pipeline, and the water volume adjustment range in the accommodation cavity is relatively large, and it can be adjusted adaptively according to various working conditions, so that the cooling effect of the cooling device is better and the applicability is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0034] Figure 1 It is a schematic structural diagram of an embodiment of the water vapor compression device of the present application;

[0035] Figure 2 It is a schematic structural diagram of another embodiment of the water vapor compression device of the present application;

[0036] Figure 3 It is a schematic control structure diagram of an embodiment of the water vapor compression device of the present application;

[0037] Figure 4 It is a schematic flowchart of an operation method provided by an embodiment of the present application;

[0038] Figure 5 It is a schematic flowchart of another embodiment of the operation method of the water vapor compression device of the present application;

[0039] Figure 6 It is a schematic flowchart of still another embodiment of the operation method of the water vapor compression device of the present application;

[0040] Figure 7 It is a schematic flowchart of yet another embodiment of the operation method of the water vapor compression device of the present application.

[0041] Description of the reference numerals in the drawings:

[0042] 100. Steam compression equipment; 10. Compressor; 30. Cooling device; 31. Cooling tank; 311. Accommodation cavity; 32. Water inlet pipe; 321. Shunt; 33. Water outlet pipe; 331. First pipe section; 332. Second pipe section; 34. Water supply and drainage component; 341. Water supply pipe; 342. Water pump; 343. Drain pipe; 344. Drain valve; 345. Overflow pipe; 346. Liquid level sensor; 50. Gas-liquid separation device; 51. Gas-liquid separation component; 511. First separation part; 5111. Corrugated part; 512. Second separation part; 52. Separation tank; 53. Return pipe; 54. Return valve; 70. Detection component; 71. Pressure sensor; 73. Temperature sensor.

[0043] The realization of the purpose of this application, functional features and advantages will be further described in conjunction with embodiments with reference to the drawings. Specific embodiments

[0044] To make the purpose, technical solutions and advantages of this application clearer, the following will further describe the embodiments of this application in detail in conjunction with the drawings.

[0045] When the following description involves the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. On the contrary, they are only examples of devices and methods consistent with some aspects of this application as detailed in the appended claims.

[0046] In the description of this application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, in the description of this application, unless otherwise specified, "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the front and back associated objects.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0048] Reducing industrial carbon emissions is a key link in achieving my country's carbon neutrality goal. Industrial high-temperature heat pumps improve energy efficiency and significantly reduce energy consumption by recovering industrial waste heat instead of boilers to directly produce high-temperature and high-pressure steam. In order to meet the thermal energy needs of large-capacity, high-temperature water vapor, a water vapor high-temperature centrifugal heat pump can be used to recover waste heat. After generating low-temperature and low-pressure water vapor, the low-temperature and low-pressure water vapor is compressed into high-temperature and high-pressure water vapor by a water vapor compressor. However, the exhaust temperature of the water vapor is very high after compression, and the superheat is very large, so it is easy to become superheated steam. The superheated steam has a higher temperature and higher material requirements. In addition, the heat exchange effect of superheated steam is worse than that of saturated steam. Therefore, the superheated steam needs to be cooled in actual use.

[0049] The cooling methods for steam are divided into indirect heat exchange cooling and direct contact cooling. Indirect heat exchange cooling requires an external cold source to take away the heat of the superheated steam, which not only adds additional equipment, but also fails to fully utilize the sensible heat of the superheated steam. In related technologies, direct water spray cooling is usually adopted, which has obvious advantages over indirect heat exchange. For example, by directly spray cooling the compressed superheated steam, low-temperature water can absorb the heat of the superheated steam and flash evaporate, and mix with the superheated steam to form saturated or nearly saturated steam. In this process, the sensible heat of the superheated steam is converted into latent heat and retained in the steam, and the system is relatively simple and small in size.

[0050] However, the outlet of the spray cooling generally still has a certain degree of superheat, and it is difficult to accurately control it to a saturated state. To solve the above problem, the embodiment of the present application proposes a water vapor compression device.

[0051] Combination Figures 1 to 3 The water vapor compression device 100 proposed in the embodiment of the present application includes at least two compressors 10, a cooling device 30, a detection component 70 and a controller.

[0052] At least two compressors 10 are connected in series. For example, each compressor 10 includes a rotor and a stator. The stator forms a compression chamber, and the rotor is installed in the compression chamber and moves in the compression chamber to work on the water vapor entering the compression chamber, so that the water vapor discharged from the compression chamber has a higher pressure. The compressor 10 also includes components or equipment that enable it to complete the operation, such as a driving device, a rotating shaft, etc. The structure and working principle of the compressor 10 have long been disclosed in the relevant technology, and this application will not repeat them.

[0053] At least two compressors 10 are used to compress the water vapor step by step to increase the pressure of the water vapor. The number of compressors 10 provided in the water vapor compression device 100 may be two, three, four, etc., and this application does not impose any limitation on this.

[0054] The vapor compression device 100 further includes an exhaust pipeline. One end of the exhaust pipeline is connected to the previous-stage compressor 10, and the other end can be connected to the next-stage compressor 10, or can also be connected to a heat exchange device, and can also be connected to a user terminal. For example, the compressed water vapor can be used as a carrier of energy to drive a thermal power machine, provide heating or steam supply, etc. For example, it can be used to drive a turbo generator to generate electricity, or to drive other rotating machines. After the water vapor is discharged from the compressor 10, it can also release heat through a heat exchange device and transfer it to other fluids or media that need to be heated in a process. This heat exchange process can be used to heat a building, a fluid circulation system, etc.

[0055] The cooling device 30 is arranged between at least two compressors 10 and is used to cool the vapor discharged from the upstream compressor 10 and discharge the cooled vapor to the downstream compressor 10. It can be understood that, relative to the cooling device 40, the upstream compressor 10 is the upstream device, and the downstream compressor 10 is the downstream device. For the vapor compression device 100 in the embodiment of the present application, a cooling device 30 is arranged between every two compressors 10, or, in some compressors 10, a cooling device 30 is arranged between every two compressors 10, and the other part of the compressors 10 are directly connected in series. The present application does not make any limitations in this regard.

[0056] Combined with Figure 1 , the cooling device 30 in the embodiment of the present application includes a cooling tank 31, an intake pipe 32, an outlet pipe 33, and a water supply and drainage component 34. The shape of the cooling tank 31 is not limited, and it is made of a material that can withstand high temperatures, such as a metal material. The cooling tank 31 has a receiving cavity 311 for holding water. One end of the intake pipe 32 is connected to the compressor 10 upstream of the cooling device 30, and the other end extends into the receiving cavity 311 and is used to discharge the vapor into the water. Optionally, the end of the intake pipe 32 located in the receiving cavity 311 is submerged in the water. One end of the outlet pipe 33 is connected to the cooling tank 31, and the other end is connected to the compressor 10 downstream of the cooling device 30. The water supply and drainage component 34 is connected to the cooling tank 31 and is used to supply water to the receiving cavity 311 or discharge the water in the receiving cavity 311.

[0057] The detection component 70 is configured to detect the superheat degree of the vapor at one end of the outlet pipe 33 connected to the compressor 10. Exemplarily, the detection component 70 includes a pressure sensor 71 and a temperature sensor 73. The pressure sensor 71 is installed inside the outlet pipe 33, and the temperature sensor 73 is installed inside the outlet pipe 33 and is located at one end of the outlet pipe 33 connected to the compressor 10. The pressure value inside the outlet pipe 33 is obtained through the pressure sensor 71, and the saturation temperature at the current pressure is obtained according to the correspondence between the pressure value and the saturation temperature of the saturated vapor. The real-time temperature at one end of the outlet pipe 33 connected to the compressor 10 is obtained through the temperature sensor 73, and the superheat degree of the vapor is determined based on the real-time temperature and the saturation temperature, that is, the superheat degree of the vapor = real-time temperature - saturation temperature. Of course, embodiments in other aspects of this application may also obtain the superheat degree of the vapor directly or indirectly in other ways, which are not limited herein.

[0058] The controller is respectively in signal connection with the detection component 70 and the water supply and drainage component 34. Optionally, the controller is connected to the detection component 70 and the water supply and drainage component 34 through signal lines or wirelessly. The controller is configured to adjust the water volume in the accommodation cavity 311 based on the superheat degree of the vapor and a preset superheat degree until the superheat degree of the vapor is equal to the preset superheat degree. Exemplarily, the water supply and drainage component 34 includes a liquid level sensor 346, a water supply pipe 341, a water pump 342, a drain pipe 343, and a drain valve 344. At least part of the liquid level sensor 346 is located inside the accommodation cavity 311 to detect the real-time water level inside the accommodation cavity 311. The water supply pipe 341 and the drain pipe 343 are connected to the cooling tank 31, the water pump 342 is connected to the water supply pipe 341, the drain valve 344 is connected to the drain pipe 343, and the liquid level sensor 346, the water pump 342, and the drain valve 344 are all in signal connection with the controller.

[0059] Specifically, in the embodiment of this application, the vapor of the upper-stage compressor 10 enters the accommodation cavity 311 through the inlet pipe 32, and after the vapor exchanges heat with the water in the accommodation cavity 311 and cools down, it is discharged to the lower-stage compressor 10 through the outlet pipe 33. The superheat degree of the vapor reflects the comparison between the real-time temperature and the saturation temperature of the vapor at one end of the outlet pipe 33 connected to the compressor 10, that is, the vapor entering the lower-stage compressor 10. Obviously, the greater the superheat degree of the vapor, the higher the temperature of the vapor at one end of the outlet pipe 33 connected to the compressor 10, which is not conducive to the compression operation of the lower-stage compressor 10.

[0060] This application sets a preset superheat degree and adjusts the water volume in the accommodation chamber 311 according to the steam superheat degree and the preset superheat degree. It can be understood that the more water there is in the accommodation chamber 311, the more sufficient the heat exchange between the steam and the water, and the lower the steam superheat degree. If the steam superheat degree is less than the preset superheat degree, it indicates that the steam heat exchange is too sufficient and the steam temperature is too low. At this time, the controller can open the drain valve 344 to drain part of the water in the accommodation chamber 311, so as to adjust the heat exchange degree between the water and the steam in the accommodation chamber 311 until the steam superheat degree is equal to the preset superheat degree. If the steam superheat degree is greater than the preset superheat degree, it indicates that the steam temperature is too high and the steam heat exchange at the cooling device 30 is insufficient. At this time, the controller can start the water pump 342 to supply water to the accommodation chamber 311 to reduce the heat exchange between the steam and the water until the steam superheat degree is equal to the preset superheat degree.

[0061] Based on the above description, in the embodiment of this application, the steam between the two-stage compressor 10 is cooled by water bath through the cooling device 30. The steam discharged from the upper-stage compressor 10 is introduced into the water through the intake pipe 32. The flow rate of the steam entering the water drops suddenly, so that the retention time of the steam in the water can be extended, and the steam can fully exchange heat with the water in the accommodation chamber 311, ensuring the cooling effect. The cooled steam flows to the lower-stage compressor 10 through the outlet pipe 33. By adjusting the water volume in the accommodation chamber 311, the steam superheat degree of the steam at the end of the outlet pipe 33 connected to the compressor 10 can meet the preset superheat degree, so as to flexibly adjust the cooling effect of the steam, which is convenient for the lower-stage compressor 10 to further compress the steam and reduce the power consumption of the compressor 10.

[0062] In addition, in the related art, in the form of spray cooling, spray cooling needs to use high-pressure cooling water to achieve spraying. The better the spraying effect, the higher the pressure requirement. The fine nozzle is easy to wear under high pressure, and the spraying effect is affected after wear. The embodiment of this application does not require high-pressure spraying, saves the cost of the high-pressure water pump 342, and does not require a high-precision nozzle. There is no need to worry about the wear of the nozzle affecting the heat exchange effect. The cooling effect is more stable and reliable, and the cost is lower.

[0063] In the related art, due to the mixing of the spray and the steam, the pipe length required for the complete endothermic evaporation of the spray is relatively long, usually recommended to be 7-8 meters of straight pipe. Even so, the water droplets sprayed on the pipe wall cannot be completely evaporated in the given pipe. The fog droplets and superheated steam sprayed on the wall continuously cause thermal stress on the pipe wall by thermal shock, which is easy to cause fatigue damage to the pipe. In this regard, in the embodiment of this application, the steam is directly discharged into the water in the accommodation chamber 311, which can relieve the thermal stress caused by the thermal shock to the cooling device 30. Moreover, the tank body of the cooling tank 31 has a larger volume than the spray pipe, and the adjustment range of the water volume in the accommodation chamber 311 is larger, which can be adaptively adjusted according to various working conditions of the compressor 10, so that the cooling effect of the cooling device 30 is better and the applicability is stronger.

[0064] Combined with Figure 1 and Figure 2 In some embodiments, the intake pipe 32 includes an intake pipe 32 main body and a diverter 321. The two ends of the intake pipe 32 main body are respectively connected to the compressor 10 located upstream of the cooling tank 31 and the diverter 321, and the diverter 321 is used to be immersed in water. Thus, the vapor discharged from the compressor 10 located upstream of the cooling tank 31 enters the water directly through the intake pipe 32 main body and the diversion pipe. The diverter 321 has a plurality of diversion air ports arranged at intervals, and the vapor enters the water from the plurality of diversion air ports, making the distribution of the vapor more uniform and enabling sufficient heat exchange with the water to improve the cooling effect.

[0065] Furthermore, the plurality of diversion air ports are located on the same horizontal plane, so as to further make the heat exchange effect of the vapor more uniform. Along the height direction of the cooling tank 31, the opening direction of the diversion air ports is set upward, which is convenient for the vapor to be discharged. Of course, in other embodiments of the present application, the intake pipe 32 may also be provided with one diversion air port, and the opening direction of the diversion air port may also be downward or towards any side in the horizontal plane, etc. The embodiments of the present application do not limit this.

[0066] After the vapor exchanges heat sufficiently with the water in the accommodation chamber 311, it is likely to carry a certain amount of water, resulting in heat loss in the multi-stage vapor compressor 10 and being unable to generate more vapor, thereby restricting the improvement of the energy efficiency of the water vapor compression device. Therefore, the water vapor compression device 100 in the present application further includes a gas-liquid separation assembly 51, and the gas-liquid separation assembly 51 is used to perform gas-liquid separation on the vapor after heat exchange with water.

[0067] Referring to Figure 1 In some embodiments, the gas-liquid separation assembly 51 is disposed in the accommodation chamber 311 and above the water surface. Exemplarily, the gas-liquid separation assembly 51 may include at least one of a gravity type gas-liquid separator, a filtration type gas-liquid separator, etc.

[0068] In one embodiment, the outlet pipe 33 communicates with the accommodation chamber 311 from the top of the cooling tank 31. The gas-liquid separation assembly 51 includes a first separation member 511 and a second separation member 512. The first separation member 511 is located above the water surface, and the second separation member 512 is located above the second separation member 512. In this embodiment, the vapor after heat exchange with water enters the outlet pipe 33 after passing through the first separation member 511 and the second separation member 512 in sequence. Exemplarily, the first separation member 511 includes a plurality of guide plates, and the plurality of guide plates define an air passage for the vapor to pass through. The guide plates extend substantially along the height direction of the cooling tank 31. Correspondingly, the air passage also extends substantially along the height direction of the cooling tank 31. When flowing through the air passage, large droplet liquid in the vapor forms a liquid film on the surface of the guide plate and flows downward under the action of gravity and then falls back into the water, realizing the primary separation of gas and liquid. The second separation member 512 is a wire mesh, and the wire mesh can capture fine droplets in the vapor, realizing the secondary separation of gas and liquid. Thus, through the two-stage gas-liquid separation of the first separation member 511 and the second separation member 512 in this embodiment, the water content of the vapor flowing into the outlet pipe 33 is greatly reduced, or it can become dry saturated vapor, which is convenient for the compression of the next-stage compressor 10 and improves the energy efficiency of the compressor 10.

[0069] Further, the guide plate has a corrugated portion 5111, and the corrugated portion 5111 is arranged at an angle with the flow path of the vapor. For example, the vapor flows along the height direction of the cooling tank 31, and the extending direction of the corrugated portion 5111 is arranged at an angle with the height direction of the cooling tank 31. As Figure 1 shown, a plurality of corrugated portions 5111 are provided on the guide plate, and the plurality of corrugated portions 5111 are connected in sequence along the height direction of the cooling tank 31, and each corrugated portion 5111 protrudes towards one side in the horizontal direction of the guide plate. Thus, it can not only increase the contact area between the guide plate and the vapor, but also form a partial blockage of the vapor flowing through the air passage, facilitating the attachment of the droplets in the vapor to the guide plate and improving the gas-liquid separation effect.

[0070] Optionally, the first separation member 511 and the second separation member 512 can also be a combination of other feasible implementation manners such as a guide pipe and a filter screen, and more separation members can also be provided in the gas-liquid separation assembly 51 to further improve the gas-liquid separation effect, which is not limited in the embodiments of the present application. Of course, the gas-liquid separation assembly 51 can also adopt a single separation device. For example, the gas-liquid separation assembly 51 can adopt a guide plate alone. It can be understood that to ensure the gas-liquid separation effect, when a guide plate is used alone for gas-liquid separation, the guide plate needs to be long enough, and the cooling tank 31 will be larger accordingly. Using the first separation member 511 and the second separation member 512 for multi-stage separation can reduce the occupied volume of the gas-liquid separation assembly 51 on the premise of ensuring the gas-liquid separation effect, so that the cooling tank 31 is smaller and the space occupation is reduced.

[0071] In this embodiment of the present application, the gas-liquid separation component 51 is arranged in the accommodation cavity 311, which makes the structural integration degree of the water vapor compression device 100 higher, with fewer parts, and avoids more floor space. It can not only effectively reduce the temperature loss and pressure loss of the vapor, but also the separated liquid can directly fall back into the water in the accommodation cavity 311, improving the utilization rate of water and avoiding water loss to further reduce heat loss.

[0072] Combined with Figure 2 , in another embodiment, the water vapor compression device 100 includes a gas-liquid separation device 50, and the gas-liquid separation device 50 is arranged outside the cooling tank 31. Specifically, the air outlet pipe 33 of the gas-liquid separation device 50 includes a first pipe section 331 and a second pipe section 332. One end of the first pipe section 331 is connected to the cooling tank 31, and the other end is connected to the gas-liquid separation device 50. One end of the second pipe section 332 is connected to the gas-liquid separation device 50, and the other end is connected to the compressor 10. In this embodiment, the gas-liquid separation device 50 is placed outside the cooling tank 31, and while performing gas-liquid separation, the structural design of the cooling device 30 is simplified.

[0073] Specifically, the gas-liquid separation device 50 includes a separation tank 52, a gas-liquid separation component 51, and a return pipe 53. Among them, the separation tank 52 is connected to the first pipe section 331 and the second pipe section 332. The specific shape of the separation tank 52 is not limited, and it is made of a high-temperature resistant material, such as metal. The gas-liquid separation component 51 is arranged in the separation tank 52. The specific structure of the gas-liquid separation component 51 can adopt the combination form of the above-mentioned first separation part 511 and the second separation part 512, or the gas-liquid separation component 51 can also adopt other forms, which are not required here. One end of the return pipe 53 is connected to the separation tank 52, and the other end is connected to the cooling tank 31 to be used for returning the water in the separation tank 52 to the cooling tank 31, and a return valve 54 for controlling the on-off of the flow path in the return pipe 53 is provided on the return pipe 53. Optionally, the return valve 54 is a steam trap. When the vapor cools and condenses into water, this water will accumulate at the bottom of the steam trap. As the water level rises, the steam trap will automatically open to discharge the condensed water. When the water level drops to a certain extent, the steam trap will close to prevent steam leakage. Thus, in this embodiment, by arranging the return pipe 53 to return the water separated from the separation tank 52 to the cooling tank 31, the recycling of water is realized, the utilization rate of water is improved and the heat dissipation is reduced, ensuring the full utilization of heat in the system of the water vapor compression device 100.

[0074] Optionally, the return pipe 53 can be directly connected to the cooling tank 31, or the return pipe 53 can also be connected to the water supply pipe 341 and is located upstream of the water pump 342 to flow into the accommodation cavity 311 through the water supply pipe 341 when the water pump 342 is started.

[0075] When the water level in the accommodation chamber 311 is too high, there is a risk of steam condensation, resulting in insufficient gas outlet volume. To control the water volume in the accommodation chamber 311, in one embodiment, the water supply and drainage assembly 34 further includes an overflow pipe 345, and the overflow pipe 345 communicates with the accommodation chamber 311 from the side wall of the cooling tank 31. When the water level in the accommodation chamber 311 is higher than the connection point between the overflow pipe 345 and the cooling tank 31, water flows out of the accommodation chamber 311 through the overflow pipe 345, so that the water level in the accommodation chamber 311 is not higher than the connection point between the overflow pipe 345 and the accommodation chamber 311.

[0076] Based on the above structure, combined with Figures 4 to 6 , the steam compression device 100 of the embodiment of the present application can operate according to the following operation method, and the operation method includes:

[0077] S10: Obtain the superheat degree of the steam at one end of the air outlet pipe 33 connected to the compressor 10;

[0078] S30: Adjust the water volume in the accommodation chamber 311 based on the superheat degree of the steam and the preset superheat degree until the superheat degree of the steam is equal to the preset superheat degree.

[0079] Specifically, the superheat degree of the steam reflects the comparison between the real-time temperature and the saturation temperature of the steam at one end of the air outlet pipe 33 connected to the compressor 10, that is, the steam entering the next-stage compressor 10. Obviously, the greater the superheat degree of the steam, the higher the temperature of the steam at one end of the air outlet pipe 33 connected to the compressor 10, which is not conducive to the compression operation of the next-stage compressor 10. The embodiment of the present application sets a preset superheat degree and adjusts the water volume in the accommodation chamber 311 according to the superheat degree of the steam and the preset superheat degree. In this way, the superheat degree of the steam at one end of the air outlet pipe 33 connected to the compressor 10 can meet the preset superheat degree, so as to flexibly adjust the cooling effect of the steam, facilitate the further compression of the steam by the next-stage compressor 10, and reduce the power consumption of the compressor 10.

[0080] In one embodiment, the step of adjusting the water volume in the accommodation chamber 311 based on the superheat degree of the steam and the preset superheat degree until the superheat degree of the steam is equal to the preset superheat degree includes:

[0081] S31: If the superheat degree of the steam is greater than the preset superheat degree, control the water supply and drainage assembly 34 to replenish water into the accommodation chamber 311 until the superheat degree of the steam is equal to the preset superheat degree;

[0082] S33: If the superheat degree of the steam is less than the preset superheat degree, control the water supply and drainage assembly 34 to drain the water in the accommodation chamber 311 until the superheat degree of the steam is equal to the preset superheat degree.

[0083] Exemplarily, the water supply and drainage assembly 34 includes a liquid level sensor 346, a water supply pipe 341, a water pump 342, a drainage pipe 343, and a drain valve 344. At least a part of the liquid level sensor 346 is located in the accommodation cavity 311 for detecting the real-time water level in the accommodation cavity 311. The water supply pipe 341 and the drainage pipe 343 are connected to the cooling tank 31, the water pump 342 is connected to the water supply pipe 341, the drain valve 344 is connected to the drainage pipe 343, and the liquid level sensor 346, the water pump 342, and the drain valve 344 are all in signal connection with the controller.

[0084] It can be understood that if the superheat degree of the vapor is less than the preset superheat degree, it indicates that the vapor heat exchange is too sufficient and the vapor temperature is too low. At this time, the controller can control the drain valve 344 to open to drain part of the water in the accommodation cavity 311, so as to adjust the heat exchange degree between the water and the vapor in the accommodation cavity 311 until the superheat degree of the vapor is equal to the preset superheat degree. If the superheat degree of the vapor is greater than the preset superheat degree, it indicates that the vapor temperature is too high and the vapor heat exchange at the cooling device 30 is insufficient. At this time, the controller can control the water pump 342 to start to replenish water into the accommodation cavity 311 to reduce the heat exchange between the vapor and the water until the superheat degree of the vapor is equal to the preset superheat degree.

[0085] In this way, in the embodiment of the present application, by controlling the water supply and drainage assembly 34 to replenish water into the accommodation cavity 311, or controlling the water supply and drainage assembly 34 to drain part of the water in the accommodation cavity 311 to control the water volume in the accommodation cavity 311, so that the superheat degree of the vapor at the end of the outlet pipe connected to the compressor 10 is equal to the preset superheat degree, which is convenient for the next-stage compressor 10 to compress the vapor and reduces the energy consumption of the compressor 10.

[0086] In one embodiment, the step of obtaining the superheat degree of the vapor at the end of the exhaust pipe connected to the compressor 10 includes:

[0087] S11: Obtain the pressure value of the pressure sensor 71 and obtain the saturation temperature corresponding to the pressure value;

[0088] S13: Obtain the real-time temperature of the temperature sensor 73 and determine the superheat degree of the vapor based on the real-time temperature and the saturation temperature.

[0089] Exemplarily, the detection assembly 70 includes a pressure sensor 71 and a temperature sensor 73 that are in signal connection with the controller. The pressure sensor 71 is installed in the outlet pipe 33, and the temperature sensor 73 is installed in the outlet pipe 33 and is located at the end of the outlet pipe 33 connected to the compressor 10. In this embodiment, after obtaining the pressure value of the pressure sensor 71, the saturation temperature value is obtained according to the corresponding relationship between the pressure and temperature of the saturated vapor, and the superheat degree of the vapor = real-time temperature - saturation temperature.

[0090] Optionally, the preset superheat degree may be 0°C. When the superheat degree of the vapor is equal to the preset superheat degree, it indicates that the real-time temperature of the vapor at the end of the water outlet pipe connected to the compressor 10 is equal to the saturation temperature, and the vapor is saturated vapor. Thus, by making the vapor entering the next-stage compressor 10 be saturated vapor, the superheat degree of the vapor is greatly reduced, the energy consumption of the compressor 10 is reduced, and the overall efficiency of the water vapor compression device 100 is improved. Of course, the preset superheat degree may also be other values, which are not limited here.

[0091] Combined with Figure 7 , in one embodiment, before the step of obtaining the superheat degree of the vapor in the exhaust pipe, the following steps are further included:

[0092] S50: Obtain the real-time water level in the accommodation chamber 311;

[0093] S70: If the real-time water level is lower than the set water level, control the water supply and drainage component 34 to supply water to the accommodation chamber 311.

[0094] In the embodiment of the present application, the cooling device 30 is provided with a liquid level sensor 346. The type of the liquid level sensor 346 is not limited, and it is connected to the controller. The real-time water level in the accommodation chamber 311 can be obtained through the liquid level sensor 346. If the real-time water level in the accommodation chamber 311 is lower than the set water level, it indicates that the amount of water in the accommodation chamber 311 is small, which may affect the cooling effect. Thus, before the step of obtaining the superheat degree of the vapor in the exhaust pipe, ensuring that the real-time water level in the accommodation chamber 311 is not lower than the set water level in advance can ensure that the amount of water in the accommodation chamber 311 is sufficient, which is not only convenient for the vapor to fully exchange heat with the water to ensure the cooling effect, but also reduces the time for subsequent water volume adjustment and improves the adjustment efficiency.

[0095] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for exemplary illustration and cannot be understood as a limitation of the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0096] The above are only the preferred embodiments of the present application and are not used to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cooling device, characterized in that, It includes a cooling tank, an intake pipe, an outlet pipe, and a water supply and drainage component; The cooling tank has a receiving cavity for holding water. One end of the intake pipe is used to receive the vapor output by the upstream device, and the other end extends into the receiving cavity and is used to discharge the vapor into the water. One end of the outlet pipe is connected to the cooling tank, and the other end is used to output vapor to the downstream device; The water supply and drainage component is connected to the cooling tank to adjust the water volume in the receiving cavity.

2. The cooling device according to claim 1, characterized in that, The intake pipe includes a diverter, and the diverter is used to be immersed in water and has a plurality of diverting air ports arranged at intervals.

3. The cooling device according to claim 2, characterized in that, The plurality of diverting air ports are located on the same horizontal plane; and / or Along the height direction of the cooling tank, the opening direction of the diverting air port is set upward.

4. The cooling device according to claim 1, wherein It further includes a gas-liquid separation component, and the gas-liquid separation component is arranged in the receiving cavity and above the water surface.

5. The cooling device according to claim 4, characterized in that The outlet pipe communicates with the receiving cavity from the top of the cooling tank. The gas-liquid separation component includes a first separation member and a second separation member. The first separation member is above the water surface, and the second separation member is above the first separation member.

6. The cooling device according to claim 5, characterized in that, The first separation member includes a plurality of guide plates, and the plurality of guide plates define an air passage for the vapor to pass through. The guide plates are used to guide the liquid attached to the guide plates to fall back. The guide plates have corrugated portions, and the corrugated portions are arranged at an angle with the vapor flow path; and / or The second separation member is a wire mesh.

7. The cooling device according to claim 1, characterized in that, It further includes a gas-liquid separation device. The outlet pipe includes a first pipe section and a second pipe section. One end of the first pipe section is connected to the cooling tank, and the other end is connected to the gas-liquid separation device. One end of the second pipe section is connected to the gas-liquid separation device, and the other end is used to output vapor to the downstream device.

8. The cooling device according to claim 7, characterized in that, The gas-liquid separation device includes: A separation tank, connected to the first pipe section and the second pipe section; A gas-liquid separation component, arranged in the separation tank; and A return pipe, one end of which is connected to the separation tank, and the other end is connected to the cooling tank to return the water in the separation tank to the cooling tank. And a return valve for controlling the on-off of the flow path in the return pipe is provided on the return pipe.

9. The cooling device according to claim 8, characterized in that, The gas-liquid separation component includes a first separation member and a second separation member. The first separation member is above the water surface, and the second separation member is above the first separation member.

10. The cooling device according to claim 9, characterized in that, The first separation member includes a plurality of guide plates, and the plurality of guide plates define an air passage for the vapor to pass through. The guide plates are used to guide the liquid attached to the guide plates to fall back. The guide plates have corrugated portions, and the corrugated portions are arranged at an angle with the vapor flow path; and / or The second separation member is a wire mesh.

11. A steam compression device, characterized in that, It includes: At least two compressors connected in series; The cooling device according to any one of claims 1 to 10; A detection component configured to detect the superheat degree of the vapor at one end of the outlet pipe connected to the compressor; And A controller, respectively signal-connected to the detection component and the water supply and drainage component, and configured to adjust the water volume in the receiving cavity based on the superheat degree of the vapor and a preset superheat degree until the superheat degree of the vapor is equal to the preset superheat degree.

12. The water vapor compression device according to claim 11, wherein, The detection component includes a pressure sensor and a temperature sensor. The pressure sensor is installed in the outlet pipe, and the temperature sensor is installed in the outlet pipe and is located at one end of the outlet pipe connected to the compressor.

13. The steam compression device according to claim 11, characterized in that, The water supply and drainage component includes a liquid level sensor, a water supply pipe, a water pump, a drainage pipe, and a drainage valve. At least part of the liquid level sensor is located in the accommodation cavity. The water supply pipe and the drainage pipe are connected to the cooling tank. The water pump is connected to the water supply pipe, and the drainage valve is connected to the drainage pipe. The liquid level sensor, the water pump, and the drainage valve are all signal-connected to the controller; and / or, The water supply and drainage component includes an overflow pipe. The overflow pipe communicates with the accommodation cavity from the side wall of the cooling tank to keep the water level in the accommodation cavity not higher than the connection point of the overflow pipe and the accommodation cavity.

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