Cooling device and compression system
By using cooling devices and spray cooling components in a multi-stage steam compression system, the problem of increased compression power consumption caused by excessively high steam temperature is solved, achieving efficient heat exchange and vapor-liquid separation, thereby improving system energy efficiency and equipment lifespan.
Patent Information
- Application Number
- CN202520043661.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-08
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-01-08
AI Technical Summary
In the prior art, when the steam from the front stage of a multi-stage steam compressor is directly discharged into the steam compressor of the next stage, the inlet temperature of the steam compressor of the next stage becomes too high, which increases the compression power consumption and may damage the components.
A cooling device is adopted, including a shell and a spray cooling assembly. Cooling water is sprayed through nozzles in the cooling channel to reduce the steam temperature, and the steam and liquid droplets are separated in the vapor-liquid separation channel. The spray increases the heat exchange area and the flow rate difference to achieve efficient heat exchange and separation.
It effectively reduces steam temperature, prevents increased power consumption of downstream steam compressors, improves system energy efficiency, extends the life of steam compressors, and achieves steam cooling and vapor-liquid separation in small cooling devices.
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Figure CN223608936U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of vapor compression technology, in particular to a cooling device and a compression system. BACKGROUND
[0002] The compression system usually comprises a plurality of vapor compressors connected in sequence, and the vapor is compressed in sequence through the plurality of vapor compressors, so that better compressed vapor can be obtained.
[0003] However, the temperature of the vapor discharged from the previous stage vapor compressor is high, and if the vapor is directly discharged into the next stage vapor compressor, the inlet temperature of the next stage vapor compressor will be too high, thereby increasing the compression power consumption of the next stage vapor compressor. CONTENT OF THE INVENTION
[0004] The present application provides a cooling device and a compression system, which reduces the temperature of the vapor through the cooling device, thereby preventing the inlet temperature of the next stage vapor compressor from being too high to increase the compression power consumption of the next stage vapor compressor.
[0005] In a first aspect, the present application provides a cooling device, comprising:
[0006] a housing having a cooling passage, a vapor-liquid separation passage and an outlet passage arranged in sequence, a first end of the cooling passage forming an inlet, a second end of the cooling passage forming a communication port in communication with the vapor-liquid separation passage, a first end of the outlet passage being in communication with the vapor-liquid separation passage, and a second end of the outlet passage forming an outlet; and
[0007] a spray cooling assembly comprising a nozzle located in the cooling passage, the nozzle being used to spray cooling water in the cooling passage;
[0008] wherein the cross-sectional area of the cooling passage is smaller than the cross-sectional area of the vapor-liquid separation passage.
[0009] In some embodiments, the cooling device further comprises a flow splitting structure arranged at the communication port and connected with the housing, the flow splitting structure comprising a plurality of flow splitting passages arranged at intervals, the flow splitting passages being in communication with the cooling passage and the vapor-liquid separation passage. The plurality of flow splitting passages can quickly disperse the steam-water mixture in the vapor-liquid separation passage, so that the steam-water mixture can quickly spread in the vapor-liquid separation passage, thereby reducing the flow rate of the steam-water mixture in the vapor-liquid separation passage, so that the steam and liquid droplets in the vapor-liquid separation passage are more easily separated, thereby improving the vapor-liquid separation efficiency.
[0010] In some embodiments, the cross-sectional area of the distribution channel gradually increases from the end close to the cooling channel to the direction away from the cooling channel. This makes the dispersion of the steam-water mixture more uniform, and the steam-water mixture can enter the vapor-liquid separation channel at a smaller flow rate.
[0011] In some embodiments, the distribution structure comprises a mounting frame arranged at the communication port and connected with the shell, and a plurality of distribution rings connected with the mounting frame, the plurality of distribution rings are arranged in sequence and spaced along the radial direction, and the distribution channels are formed between adjacent two distribution rings. This makes the steam-water mixture uniformly dispersed along the distribution channels, and the mounting and fixing of the distribution structure are more convenient.
[0012] In some embodiments, the mounting frame comprises a first mounting member and a second mounting member, the first mounting member and the second mounting member are arranged in cross and connected with the shell, and the plurality of distribution rings are connected with the first mounting member and the second mounting member. This makes the annular distribution rings have more connection nodes with the mounting frame, thereby improving the connection strength of the distribution rings and the mounting frame, preventing the distribution rings from falling off, and also dispersing the steam-water mixture flowing out of the communication port by using the mounting frame.
[0013] In some embodiments, the distribution structure comprises a plurality of distribution plates arranged at the communication port and connected with the shell, and the plurality of distribution plates are arranged in cross to form a grid structure, and the mesh holes of the grid structure form the distribution channels. A larger number of distribution channels can be formed.
[0014] In some embodiments, the cooling device further comprises a first wire mesh arranged in the cooling channel and located at the side of the nozzle close to the communication port, and the peripheral side of the first wire mesh abuts against the inner wall of the cooling channel. The first wire mesh can block the liquid droplets in the steam-water mixture, thereby reducing the flow rate of the liquid droplets, and the steam can normally pass through the first wire mesh, ensuring the relative flow rates of the steam and the liquid droplets, thereby enhancing the heat exchange efficiency between the steam and the cooling water.
[0015] In some embodiments, the cooling device further comprises a second wire mesh arranged in the vapor-liquid separation channel, and the peripheral side of the second wire mesh abuts against the inner wall of the vapor-liquid separation channel. When the steam-water mixture flows through the second wire mesh in the vapor-liquid separation channel, the smaller liquid droplets in the steam-water mixture are intercepted by the second wire mesh, and the steam normally passes through the second wire mesh, thereby separating the liquid droplets from the steam in the steam-water mixture, which can improve the vapor-liquid separation efficiency and achieve a better vapor-liquid separation effect.
[0016] In some embodiments, the cooling device further comprises a water collecting tank located below the housing, the water collecting tank having a water collecting cavity, a bottom of the inner wall of the vapor-liquid separation channel is provided with a first water outlet communicating with the water collecting cavity, the first water outlet is located at a side of the second mesh close to the communicating opening. Water and liquid at the bottom of the vapor-liquid separation channel can be discharged into the water collecting cavity through the first water outlet, preventing water and liquid from accumulating in the vapor-liquid separation channel, thereby preventing water and liquid from being carried into the steam compressor by steam.
[0017] In some embodiments, a bottom of the inner wall of the vapor-liquid separation channel is provided with a second water outlet communicating with the water collecting cavity, the second water outlet is located at a side of the second mesh close to the gas outlet channel. Water and liquid passing through the second mesh can be discharged into the water collecting cavity through the second water outlet, preventing water and liquid from accumulating in the vapor-liquid separation channel.
[0018] In some embodiments, a bottom of the inner wall of the vapor-liquid separation channel is provided with a water blocking member, the water blocking member is located between the first water outlet and the second mesh, the water blocking member extends along the circumference of the vapor-liquid separation channel. Water and liquid located at a side of the water blocking member close to the communicating opening can be prevented from flowing along the inner wall of the vapor-liquid separation channel towards the second mesh, so that water and liquid can be discharged into the water collecting cavity through the first water outlet more quickly.
[0019] In some embodiments, a cross-sectional area of the gas outlet channel is smaller than a cross-sectional area of the vapor-liquid separation channel. The flow rate of steam in the gas outlet channel can be increased, so that steam can be discharged into the steam compressor at the rear stage more quickly.
[0020] In a second aspect, the present application further provides a compression system, comprising a plurality of steam compressors connected in sequence, and a cooling device according to any one of the above embodiments, the cooling device being connected between two adjacent steam compressors.
[0021] The application has the beneficial effects that the cooling device can be applied between two adjacent stages of steam compressors, steam discharged from the front stage of steam compressors can enter the cooling channel through the gas inlet, and then the cooling water can be sprayed through the nozzle, the cooling water can absorb the heat of the steam to evaporate, so as to reduce the temperature of the steam, thereby preventing the inlet temperature of the rear stage of steam compressors from being too high to cause the compression power consumption of the rear stage of steam compressors to increase, and the spray can increase the heat exchange area between the cooling water and the steam, improve the heat reduction efficiency, and the evaporated cooling water can increase the steam quantity, so that the superheated steam is reduced to saturated or near-saturated steam, thereby converting the sensible heat of the steam into latent heat and retaining it in the steam, which can reduce the compression power consumption of the steam compressor and increase the steam output of the steam compressor, thereby improving the system energy efficiency; in addition, the steam has a high flow rate in the cooling channel, which can realize efficient heat exchange by using the high flow rate, thereby improving the heat exchange efficiency between the cooling water and the steam, and then the sufficient heat exchange between the cooling water and the steam can be realized in a short cooling channel, the flow rate of the steam-water mixture in the steam-liquid separation channel is low, so that the liquid droplets carried in the steam-water mixture can be separated from the steam under the action of gravity and drop to the bottom of the steam-liquid separation channel, realizing steam-liquid separation, preventing the cooling water from entering the steam compressor to impact the impeller of the steam compressor and reducing the service life of the steam compressor, and at the same time, the steam can be cooled and steam-liquid separated on the basis of a small volume of the cooling device, so that the cooling device is easier to install and transport. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0023] Figure 1 FIG. 1 is a structural schematic diagram of a cooling device in an embodiment of the present application;
[0024] Figure 2 FIG. 2 is a structural schematic diagram of a flow distribution structure in an embodiment of the present application;
[0025] Figure 3 FIG. 3 is a structural schematic diagram of a flow distribution structure in another embodiment of the present application;
[0026] Figure 4 FIG. 4 is a structural schematic diagram of a compression system in an embodiment of the present application.
[0027] REFERENCE SIGNS:
[0028] 10, housing; 11, cooling passage; 111, air inlet; 112, communication port; 12, vapor-liquid separation passage; 13, gas outlet passage; 131, gas outlet; 14, first water outlet; 15, second water outlet; 16, water blocking member; 20, spray cooling assembly; 21, nozzle; 22, water supply pipeline; 30, flow distribution structure; 31, mounting frame; 311, first mounting member; 312, second mounting member; 32, flow distribution ring; 33, flow distribution passage; 34, flow distribution plate; 40, first wire mesh; 50, second wire mesh; 61, water collecting tank; 611, water collecting cavity; 62, water outlet pipeline; 70, vapor compressor. DETAILED DESCRIPTION
[0029] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.
[0030] The compression system usually comprises a plurality of vapor compressors connected in sequence. The vapor discharged from the front vapor compressor has a high temperature and a large superheat degree. If the vapor is directly discharged into the rear vapor compressor, the inlet temperature of the rear vapor compressor will be too high, which will result in an increase in the compression power consumption of the rear vapor compressor. In addition, the high-temperature vapor is easy to damage the components of the vapor compressor.
[0031] Based on the above technical problem, the present application provides a cooling device and a compression system to solve the above technical problem.
[0032] In a first aspect, the present application provides a cooling device, as shown in Figure 1 The cooling device comprises a housing 10 and a spray cooling assembly 20. The housing 10 has a cooling passage 11, a vapor-liquid separation passage 12 and a gas outlet passage 13 arranged in sequence. A first end of the cooling passage 11 forms an air inlet 111. A second end of the cooling passage 11 forms a communication port 112 communicating with the vapor-liquid separation passage 12. A first end of the gas outlet passage 13 communicates with the vapor-liquid separation passage 12. A second end of the gas outlet passage 13 forms a gas outlet 131. The spray cooling assembly 20 comprises nozzles 21 arranged in the cooling passage 11. The nozzles 21 are used to spray cooling water in the cooling passage 11. The number and arrangement of the nozzles 21 can be selected as required. When a plurality of nozzles 21 are provided, the plurality of nozzles 21 can be arranged in a circumferential direction, a radial direction or an axial direction of the cooling passage 11.
[0033] It can be understood that the cooling device can be applied to two adjacent vapor compressors 70 (as shown in Figure 4The gas inlet 111 of the cooling device is communicated with the steam outlet of the front-stage steam compressor 70, and the gas outlet 131 of the cooling device is communicated with the steam inlet of the rear-stage steam compressor 70. The steam discharged from the front-stage steam compressor 70 enters the cooling channel 11 through the gas inlet 111, and then the cooling water is atomized and sprayed in the cooling channel 11 through the nozzle 21. The temperature of the cooling water is relatively low (the specific temperature of the cooling water can be selected according to actual needs), and the cooling water can absorb the heat of the steam to evaporate, thereby reducing the temperature of the steam. The cooled steam is then discharged into the rear-stage steam compressor 70 through the vapor-liquid separation channel 12 and the gas outlet channel 13 for compression, so as to prevent the high inlet temperature of the steam compressor 70 from increasing the compression power consumption and prevent the high-temperature steam from damaging the parts of the steam compressor 70. In addition, the use of the spray method can increase the heat exchange area between the cooling water and the steam, improve the heat exchange efficiency, and the atomized cooling water is easier to absorb heat and evaporate, which can increase the steam volume, and at the same time, the superheated steam is reduced to saturated or near-saturated steam, so as to convert the sensible heat of the steam into latent heat and retain it in the steam, thereby reducing the compression power consumption of the steam compressor 70, increasing the steam output of the steam compressor 70, and improving the system energy efficiency. The spray cooling assembly 20 can further include a water supply pipeline 22 communicated with the nozzle 21, and the nozzle 21 is supplied with cooling water through the water supply pipeline 22. The amount of cooling water can be controlled by the temperature and pressure of the gas inlet 111 and / or the gas outlet 131.
[0034] Specifically, the cross-sectional area of the cooling channel 11 is smaller than that of the vapor-liquid separation channel 12. It can be understood that, on the basis of a certain flow rate of the gas, the larger the cross-sectional area of the pipeline, the lower the flow rate of the gas. In the present application, the steam successively passes through the gas inlet 111, the cooling channel, the communication port 112, the vapor-liquid separation channel 12, the gas outlet channel 13, and the gas outlet 131. The cross-sectional area of the cooling channel 11 is relatively small, so that the flow rate of the steam in the cooling channel 11 is high. The high flow rate can be used to achieve efficient heat exchange, improve the heat exchange efficiency between the cooling water and the steam, and thus the cooling water and the steam can be fully heat-exchanged in a relatively short cooling channel 11. However, when the steam passes through the cooling channel 11, some liquid droplets in the cooling liquid may not be evaporated. When the steam-water mixture formed by the steam and the liquid droplets enters the vapor-liquid separation channel 12, the cross-sectional area of the vapor-liquid separation channel 12 is relatively large, so that the flow rate of the steam-water mixture in the vapor-liquid separation channel 12 is low. Therefore, the liquid droplets carried in the steam-water mixture can be separated from the steam under the action of gravity and drop to the bottom of the vapor-liquid separation channel 12, so as to achieve vapor-liquid separation and prevent the water from entering the steam compressor 70 to impact the impeller of the steam compressor 70, thereby reducing the service life of the steam compressor 70. At the same time, the steam can be cooled and vapor-liquid separated in a relatively small cooling device, so that the cooling device is easier to install and transport.
[0035] The specific cross-sectional area of the cooling channel 11 and the specific cross-sectional area of the vapor-liquid separation channel 12 can be selected according to actual needs, and the flow velocity of steam in the cooling channel 11 can be 20 m / s to 40 m / s.
[0036] In some embodiments of this application, the cooling device further includes a flow-diverting structure 30, which is disposed at the connection port 112 and connected to the housing 10. The flow-diverting structure 30 includes a plurality of spaced-apart flow-diverting channels 33, which connect the cooling channel 11 and the vapor-liquid separation channel 12. It is understood that when the vapor-water mixture in the cooling channel 11 flows to the connection port 112, the flow-diverting channels 33 can guide the vapor-water mixture to flow into the vapor-liquid separation channel 12. Through the multiple flow-diverting channels 33, the vapor-water mixture can be quickly dispersed within the vapor-liquid separation channel 12, allowing it to diffuse rapidly. This reduces the flow velocity of the vapor-water mixture within the vapor-liquid separation channel 12, making it easier to separate the vapor and liquid droplets, thereby improving the vapor-liquid separation efficiency.
[0037] Furthermore, the cross-sectional area of the diversion channel 33 gradually increases from the end closest to the cooling channel 11 towards the end furthest from the cooling channel 11. It can be understood that the diversion channel 33 is generally funnel-shaped, with a smaller diameter at the end closest to the cooling channel 11 and a larger diameter at the end furthest from the cooling channel 11. This causes the flow rate of the steam-water mixture to gradually decrease and diffuse as it passes through the diversion channel 33, resulting in a more uniform dispersion of the mixture and allowing it to enter the vapor-liquid separation channel 12 at a lower flow rate.
[0038] like Figure 2 As shown, in some embodiments, the diversion structure 30 includes a mounting frame 31 and multiple diversion rings 32. The mounting frame 31 is disposed at the communication port 112 and connected to the housing 10. The multiple diversion rings 32 are connected to the mounting frame 31, and the multiple diversion rings 32 are arranged sequentially at intervals along their radial direction, forming a diversion channel 33 between adjacent two diversion rings 32. It can be understood that the multiple diversion rings 32 are mounted and fixed on the housing 10 by the mounting frame 31. The multiple diversion rings 32 are all funnel-shaped, and the inner diameter of the multiple diversion rings 32 increases sequentially from the inside to the outside along the radial direction. The multiple diversion rings 32 define multiple annular diversion channels 33, so that the carbonated water mixture can be evenly dispersed along the diversion channels 33. Furthermore, the diversion rings 32 can be fixedly mounted on the mounting frame 31 first, and then the mounting frame 31 can be connected to the housing 10, making the installation and fixing of the diversion structure 30 more convenient.
[0039] The centerline of the diversion ring 32 can coincide with the centerline of the connecting port 112 to facilitate the positioning and installation of the diversion ring 32. The number of diversion rings 32 can be greater than or equal to 8 to obtain a sufficient number of diversion channels 33, thereby achieving a better diversion effect. The number of diversion rings 32 can be 8, 9, 12 or more.
[0040] In some embodiments, the mounting bracket 31 includes a first mounting member 311 and a second mounting member 312, which are arranged crosswise and connected to the housing 10. A plurality of diverting rings 32 are connected to the first mounting member 311 and the second mounting member 312. It is understood that the first mounting member 311 and the second mounting member 312 form an "X" or "+" shaped mounting bracket 31, allowing the annular diverting rings 32 to have more connection nodes with the mounting bracket 31 (the annular diverting rings 32 can have four connection nodes with the mounting bracket 31). This improves the connection strength between the diverting rings 32 and the mounting bracket 31, preventing the diverting rings 32 from falling off. Simultaneously, the mounting bracket 31 can be used to disperse the soda-water mixture flowing from the connecting port 112.
[0041] like Figure 3 As shown, in some other embodiments, the diversion structure 30 may include a plurality of diversion plates 34, which are disposed at the communication port 112 and connected to the housing 10. The plurality of diversion plates 34 are arranged in a cross manner to form a grid structure. The mesh of the grid structure forms diversion channels 33, thereby forming a greater number of diversion channels 33.
[0042] See also Figure 1 As shown, in some embodiments, the cooling device further includes a first wire mesh 40, which is disposed in the cooling channel 11 and located on the side of the nozzle 21 near the connecting port 112. The periphery of the first wire mesh 40 abuts against the inner wall of the cooling channel 11. When the steam-water mixture flows through the first wire mesh 40, the first wire mesh 40 can block the droplets in the steam-water mixture, thereby reducing the flow rate of the droplets. Steam can pass through the first wire mesh 40 normally, ensuring the relative flow rate of steam and droplets, thereby enhancing the heat exchange efficiency between steam and cooling water. At the same time, the first wire mesh 40 can intercept some droplets in the steam-water mixture, so that the droplets are separated from the steam.
[0043] The thickness of the first wire mesh 40 is d1, and 20 mm≤d1≤100 mm. When d1 is less than 20 mm, it is difficult to effectively block the liquid drops. When d1 is greater than 100 mm, the first wire mesh 40 occupies a large space in the cooling channel 11, thereby reducing the heat exchange space and efficiency of the steam and the cooling water. In addition, due to the small pipe diameter of the cooling channel 11, the first wire mesh 40 will cause obvious pressure loss to the inner wall of the shell 10, resulting in deformation of the shell 10. In an embodiment, d1 can be 20 mm, 40 mm, 50 mm, 70 mm, 100 mm, or other thicknesses. The porosity of the first wire mesh 40 can be greater than or equal to 0.9. In an embodiment, the porosity of the first wire mesh 40 can be 0.98.
[0044] In some embodiments, the cooling device further comprises a second wire mesh 50 arranged in the vapor-liquid separation channel 12, and the peripheral side of the second wire mesh 50 abuts against the inner wall of the vapor-liquid separation channel 12. When the steam-water mixture enters the vapor-liquid separation channel 12, the larger liquid drops in the steam-water mixture will drop to the bottom of the vapor-liquid separation channel 12 under the action of gravity. When the steam-water mixture flows through the second wire mesh 50 in the vapor-liquid separation channel 12, the smaller liquid drops in the steam-water mixture will be intercepted by the second wire mesh 50, and the steam will normally pass through the second wire mesh 50, thereby separating the liquid drops from the steam in the steam-water mixture, improving the vapor-liquid separation efficiency, and achieving better vapor-liquid separation effect.
[0045] The thickness of the second wire mesh 50 is d2, and 100 mm≤d2≤150 mm. When d2 is less than 100 mm, the second wire mesh 50 cannot effectively block the liquid drops in the steam-water mixture. When d2 is greater than 150 mm, the second wire mesh 50 will occupy a large space in the vapor-liquid separation channel 12, and the second wire mesh 50 will cause obvious pressure loss to the inner wall of the shell 10, resulting in deformation of the shell 10. In an embodiment, d2 can be 100 mm, 120 mm, 125 mm, 140 mm, 150 mm, or other thicknesses. The porosity of the second wire mesh 50 can be greater than or equal to 0.9. In an embodiment, the porosity of the second wire mesh 50 can be 0.98.
[0046] Continuing to refer to Figure 1As shown, the cooling device can further include a water collecting tank 61 located below the shell 10, the water collecting tank 61 having a water collecting cavity 611, the bottom of the inner wall of the vapor-liquid separation channel 12 is provided with a first water outlet 14 in communication with the water collecting cavity 611, the first water outlet 14 is located at the side of the second mesh screen 50 close to the communication port 112, so that the water liquid at the bottom of the vapor-liquid separation channel 12 can be discharged into the water collecting cavity 611 through the first water outlet 14, preventing the water liquid from accumulating in the vapor-liquid separation channel 12, thereby preventing the water liquid from being carried into the steam compressor 70 by the steam.
[0047] In some embodiments, the bottom of the inner wall of the vapor-liquid separation channel 12 is provided with a second water outlet 15 in communication with the water collecting cavity 611, the second water outlet 15 is located at the side of the second mesh screen 50 close to the gas outlet channel 13, so that the water liquid passing through the second mesh screen 50 can be discharged into the water collecting cavity 611 through the second water outlet 15, preventing the water liquid from accumulating in the vapor-liquid separation channel 12.
[0048] In some embodiments, the bottom of the inner wall of the vapor-liquid separation channel 12 is provided with a water blocking member 16 located between the first water outlet 14 and the second mesh screen 50, the water blocking member 16 extends along the circumference of the vapor-liquid separation channel 12, the water blocking member 16 can prevent the water liquid located at the side of the water blocking member 16 close to the communication port 112 from flowing along the inner wall of the vapor-liquid separation channel 12 to the second mesh screen 50, so that the water liquid can be discharged into the water collecting cavity 611 through the first water outlet 14 more quickly, preventing the water liquid from accumulating in the vapor-liquid separation channel 12 and being carried into the steam compressor 70 by the steam.
[0049] In some embodiments, the water blocking member 16 can be a water blocking ring, the water blocking member 16 extends along the circumference of the vapor-liquid separation channel 12 for one turn; the water blocking member 16 can also be an arc shape only provided in the lower half of the vapor-liquid separation channel 12.
[0050] In some embodiments, the cooling device can further include a water drainage pipeline 62 in communication with the water collecting cavity 611, a valve can be provided on the water drainage pipeline 62, and the water liquid in the water collecting cavity 611 can be discharged through the water drainage pipeline 62.
[0051] In some embodiments, the cross-sectional area of the gas outlet channel 13 is smaller than the cross-sectional area of the vapor-liquid separation channel 12, so as to increase the flow rate of the steam in the gas outlet channel 13, so that the steam can be quickly discharged into the rear-stage steam compressor 70. The cross-sectional area of the gas outlet channel 13 can be the same as the cross-sectional area of the gas outlet channel 13.
[0052] In a second aspect, based on the above cooling device, the present application further provides a compression system, such as Figure 4As shown, the compression system comprises a plurality of stages of vapor compressors 70 connected in series, with adjacent stages connected by a cooling device as in any of the above embodiments. The compression system can comprise 2, 3, 4 or more stages of vapor compressors 70.
[0053] The above only is the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. Cooling device, characterized in that The cooling device comprises: a shell having a cooling channel, a vapor-liquid separation channel and an outlet channel arranged in sequence, a first end of the cooling channel forming an inlet, a second end of the cooling channel forming a communication port communicating with the vapor-liquid separation channel, a first end of the outlet channel communicating with the vapor-liquid separation channel, and a second end of the outlet channel forming an outlet; and a spray cooling assembly comprising a nozzle arranged in the cooling channel, the nozzle being used for spraying cooling water in the cooling channel; wherein a cross-sectional area of the cooling channel is smaller than a cross-sectional area of the vapor-liquid separation channel.
2. Cooling device according to claim 1, characterized in that The cooling device further comprises: a flow distribution structure arranged at the communication port and connected with the shell, the flow distribution structure comprising a plurality of flow distribution channels arranged at intervals, the flow distribution channels communicating the cooling channel with the vapor-liquid separation channel.
3. Cooling device according to claim 2, characterized in that A cross-sectional area of the flow distribution channel gradually increases from one end close to the cooling channel to a direction away from the cooling channel.
4. Cooling device according to claim 2, characterized in that The flow distribution structure comprises: a mounting frame arranged at the communication port and connected with the shell; a plurality of flow distribution rings connected with the mounting frame, the plurality of flow distribution rings being arranged at intervals along a radial direction thereof, and the flow distribution channels being formed between adjacent two flow distribution rings.
5. Cooling device according to claim 4, characterized in that The mounting frame comprises a first mounting member and a second mounting member, the first mounting member and the second mounting member being arranged in a cross manner and connected with the shell, and the plurality of flow distribution rings being connected with the first mounting member and the second mounting member.
6. The cooling device of claim 2, wherein The flow distribution structure comprises: a plurality of flow distribution plates arranged at the communication port and connected with the shell, the plurality of flow distribution plates being arranged in a cross manner to form a grid structure, and the grid holes of the grid structure forming the flow distribution channels.
7. The cooling device of claim 1, wherein The cooling device further comprises: a first wire mesh arranged in the cooling channel and located at a side of the nozzle close to the communication port, a peripheral side of the first wire mesh abutting against an inner wall of the cooling channel.
8. The cooling device of claim 1, wherein, The cooling device further comprises: a second wire mesh arranged in the vapor-liquid separation channel, a peripheral side of the second wire mesh abutting against an inner wall of the vapor-liquid separation channel.
9. Cooling device according to claim 8, characterized in that The cooling device further comprises: a water collecting tank located below the shell, the water collecting tank having a water collecting cavity, a bottom of the inner wall of the vapor-liquid separation channel being provided with a first drain port communicating with the water collecting cavity, the first drain port being located at a side of the second wire mesh close to the communication port.
10. Cooling device according to claim 9, characterized in that A bottom of the inner wall of the vapor-liquid separation channel is provided with a second drain port communicating with the water collecting cavity, the second drain port being located at a side of the second wire mesh close to the outlet channel.
11. Cooling device according to claim 9, characterized in that The bottom of the inner wall of the vapor-liquid separation channel is provided with a water blocking member, the water blocking member being located between the first drain port and the second wire mesh, and the water blocking member extending along a circumferential direction of the vapor-liquid separation channel.
12. The cooling device of claim 1, wherein, A cross-sectional area of the outlet channel is smaller than a cross-sectional area of the vapor-liquid separation channel.
13. A compression system characterized by, The cooling device comprises a plurality of vapor compressors connected in sequence, and the cooling device as claimed in any one of claims 1 to 12, and the vapor compressors are connected through the cooling device between adjacent two vapor compressors.