Interstage cooling device and compression equipment

Abstract

The utility model discloses an interstage cooling device and compression equipment. The interstage cooling device comprises a device body and a cooling assembly. The device body is provided with an air inlet, a spiral flow channel and an air outlet, the air inlet and the air outlet are both communicated with the spiral flow channel, the air inlet is located at the spiral starting point of the spiral flow channel, and the air outlet is located at the spiral ending point of the spiral flow channel; the cooling assembly is connected with the device body and provided with a liquid outlet, and the liquid outlet communicates with the spiral flow channel and is close to the air inlet. The interstage cooling device can improve the heat exchange efficiency.

Description

Technical Field

[0001] This application relates to the field of compression equipment, and more particularly to an interstage cooling device and a compression device. Background Technology

[0002] Typically, the gas medium compressed by the first-stage impeller of a centrifugal compressor needs to pass through an interstage cooling device before entering the next stage impeller for compression to improve compression efficiency. However, traditional centrifugal compressor interstage cooling devices often suffer from low heat exchange efficiency, resulting in poor cooling performance and excessively long cooling times, further impacting the compressor's compression efficiency. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide an interstage cooling device that can improve heat exchange efficiency.

[0004] This application also provides a compression device.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] An interstage cooling device according to a first aspect embodiment of this application includes: a device body having an air inlet, a spiral flow channel, and an air outlet, wherein the air inlet and the air outlet are both connected to the spiral flow channel, and the air inlet is located at the spiral starting point of the spiral flow channel, and the air outlet is located at the spiral ending point of the spiral flow channel; and a cooling assembly connected to the device body, wherein the cooling assembly has a liquid outlet connected to the spiral flow channel and disposed near the air inlet.

[0007] The interstage cooling device of this application has the following advantages:

[0008] In the interstage cooling device of this application, the air inlet of the device body is used to connect with the air outlet of the upper impeller of the compressor, and the air outlet of the device body is used to connect with the air inlet of the lower impeller of the compressor, so that the compressed gas can enter the lower impeller from the upper impeller of the compressor through the air inlet, the spiral flow channel and the air outlet, and be cooled in the interstage cooling device of this application. In this process, since the liquid outlet of the cooling component is set close to the air inlet, when the compressed gas enters the device body through the air inlet, it can mix with the coolant flowing out of the liquid outlet, so that the compressed gas is cooled by the coolant. Furthermore, due to the spiral characteristics of the spiral flow channel, the compressed gas has a longer flow path between the air inlet and the air outlet, so that the coolant has sufficient time to cool the compressed gas. Therefore, the interstage cooling device of this application can have a high heat exchange efficiency to improve the cooling effect of the compressed gas.

[0009] According to the interstage cooling apparatus of the first aspect of this application, the spiral radius of the spiral flow channel gradually decreases from the air inlet toward the air outlet.

[0010] According to the interstage cooling apparatus of the first aspect of this application, the flow area of ​​the spiral channel gradually decreases along the spiral line from the air inlet toward the air outlet.

[0011] According to an embodiment of the first aspect of this application, the interstage cooling device has a preset direction, the spiral flow channel extends spirally around the preset direction, the device body includes a housing, the spiral flow channel is disposed in the housing, the air inlet and the air outlet are both opened on the housing, and the cross-sectional area of ​​the housing perpendicular to the preset direction gradually decreases towards the air outlet along the preset direction.

[0012] According to an embodiment of the first aspect of this application, the interstage cooling device includes a cooling component and an atomizing component. The cooling component is connected to the device body, the liquid outlet is disposed on the cooling component, and the atomizing component is disposed at the liquid outlet and is used to atomize the coolant flowing out through the liquid outlet.

[0013] According to the first aspect of the present application, the interstage cooling device further includes a hydrophobic element connected to the device body and disposed near the air outlet.

[0014] According to the first aspect of the present application, the interstage cooling device further includes a guide pipe that is connected to the air outlet.

[0015] According to the interstage cooling device of the first aspect of this application, the guide pipe is provided with a plurality of guide channels, the plurality of guide channels are spaced apart, and the plurality of guide channels are arranged parallel to each other along the extension direction of the guide pipe.

[0016] According to the interstage cooling device of the first aspect of this application, the distance between any two adjacent flow channels is L, which satisfies: 0.8mm≤L≤1mm.

[0017] A compression device according to a second aspect of this application includes: a multi-stage impeller; and an interstage cooling device as described above, wherein the interstage cooling device is provided between any two stages of the impeller.

[0018] The compression device of this application has the following advantages:

[0019] In the compression device of this application, the above-mentioned interstage cooling device can be provided between any two impellers to cool the compressed gas between any two impellers, thereby improving the compression efficiency of the compression device. Since the above-mentioned interstage cooling device can improve heat exchange efficiency and has a better cooling effect, the compression device of this application can have a higher gas compression efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the compression device in this application is shown;

[0022] Figure 2 A schematic diagram of the interstage cooling device in this application is shown;

[0023] Figure 3 A schematic diagram of the cooling assembly in this application is shown;

[0024] Figure 4 A partial structural schematic diagram of the guide tube in this application is shown.

[0025] Explanation of key component symbols:

[0026] 10-stage intercooling unit;

[0027] 100 - Device body; 110 - Air inlet; 120 - Spiral flow channel; 130 - Air outlet; 140 - Housing;

[0028] 200 - Cooling assembly; 210 - Liquid outlet; 220 - Cooling component; 230 - Atomizing component;

[0029] 300 - Hydrophobic components;

[0030] 400 - Flow guide tube; 410 - Flow guide channel;

[0031] 20-Impeller;

[0032] x - Preset direction. Detailed Implementation

[0033] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0034] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] Reference Figure 1 as well as Figure 2As shown, the interstage cooling device 10 involved in the embodiments of this application includes: device body 100 and cooling assembly 200.

[0039] Specifically, the device body 100 is provided with an air inlet 110, a spiral flow channel 120 and an air outlet 130. The air inlet 110 and the air outlet 130 are both connected to the spiral flow channel 120. The air inlet 110 is located at the spiral starting point of the spiral flow channel 120 and the air outlet 130 is located at the spiral ending point of the spiral flow channel 120. The cooling component 200 is connected to the device body 100. The cooling component 200 is provided with a liquid outlet 210. The liquid outlet 210 is connected to the spiral flow channel 120 and is located near the air inlet 110.

[0040] In the interstage cooling device 10 of this application, the air inlet 110 of the device body 100 is used to communicate with the air outlet of the upper impeller 20 of the compressor, and the air outlet 130 of the device body 100 is used to connect with the air inlet of the lower impeller 20 of the compressor, so that the compressed gas can enter the lower impeller 20 from the upper impeller 20 of the compressor through the air inlet 110, the spiral flow channel 120 and the air outlet 130, and can be cooled in the interstage cooling device 10 of this application. In this process, due to the liquid outlet 210 of the cooling component 200... Located close to the air inlet 110, when compressed gas enters the device body 100 through the air inlet 110, it can mix with the coolant flowing out of the liquid outlet 210 to cool the compressed gas. Furthermore, due to the spiral characteristics of the spiral flow channel 120, the compressed gas has a longer flow path between the air inlet 110 and the air outlet 130, allowing the coolant sufficient time to cool the compressed gas. Therefore, the interstage cooling device 10 of this application can have a high heat exchange efficiency to improve the cooling effect of the compressed gas.

[0041] Reference Figure 2 As shown, the spiral radius of the spiral channel 120 gradually decreases from the air inlet 110 toward the air outlet 130.

[0042] In this embodiment, no liquid substances are allowed to enter the high-speed rotating impeller 20, as the impact of liquid substances will damage the impeller 20. Since the spiral radius of the spiral channel 120 gradually decreases from the inlet 110 to the outlet 130, when the mixture of compressed gas and coolant flows in the spiral channel 120, it will be subjected to centrifugal force. This centrifugal force will separate the compressed gas and coolant, achieving the effect of gas-liquid separation. This ensures that the compressed gas entering the lower impeller 20 from the outlet 130 does not contain liquid, thus preventing damage to the lower impeller 20.

[0043] Specifically, in this embodiment, the flow area of ​​the spiral channel 120 gradually decreases along the spiral line from the air inlet 110 toward the air outlet 130.

[0044] In this embodiment, since the flow area of ​​the spiral channel 120 gradually decreases along the spiral line from the inlet 110 to the outlet 130, the flow velocity of the mixture of compressed gas and coolant gradually increases when it flows in the spiral channel 120. This strengthens the centrifugal force, thereby improving the gas-liquid separation effect and ensuring that the compressed gas entering the lower impeller 20 from the outlet 130 does not contain liquid, thus preventing damage to the lower impeller 20.

[0045] Reference Figure 2 As shown, the interstage cooling device 10 has a preset direction x, and the spiral flow channel 120 extends spirally around the preset direction x. The device body 100 includes a housing 140, the spiral flow channel 120 is disposed in the housing 140, the air inlet 110 and the air outlet 130 are both opened on the housing 140, and the cross-sectional area of ​​the housing 140 perpendicular to the preset direction x gradually decreases along the preset direction x toward the air outlet 130.

[0046] It should be noted that the preset direction x is Figure 2 The direction indicated by x in the middle.

[0047] In this embodiment, since the spiral channel is disposed inside the housing 140, the spiral flow channel 120 can be sealed by the housing 140 to improve the sealing performance of the spiral flow channel 120. At the same time, since the cross-sectional area of ​​the housing 140 perpendicular to the preset direction x gradually decreases along the preset direction x toward the air outlet 130, the shape of the housing can be adapted to the shape of the spiral flow channel 120, and the size of the housing can be reduced, thereby reducing the manufacturing cost of the housing.

[0048] Reference Figure 2 as well as Figure 3 As shown, the cooling assembly 200 includes a cooling element 220 and an atomizing element 230. The cooling element 220 is connected to the device body 100. The liquid outlet 210 is disposed on the cooling element 220. The atomizing element 230 is disposed at the liquid outlet 210 and is used to atomize the coolant flowing out through the liquid outlet 210.

[0049] In this embodiment, since the outlet 210 is located on the cooling component 220 and the atomizing component 230 is located at the outlet 210 and is used to atomize the coolant flowing out through the outlet 210, when the coolant flows out of the cooling component 220 from the outlet 210, it can be atomized by the atomizing component 230 so that the atomized coolant can be fully mixed with the compressed gas, thereby improving the mixing degree of the coolant with the compressed gas and improving the cooling effect of the coolant on the compressed gas. At the same time, the atomized coolant can be easily separated into gas and liquid by centrifugal force, thereby reducing the difficulty of separating the compressed gas and the coolant.

[0050] Reference Figure 2 As shown, the interstage cooling device 10 also includes a hydrophobic element 300, which is connected to the device body 100 and is located near the air outlet 130.

[0051] In this embodiment, since the hydrophobic element 300 is connected to the device body 100 and is located near the air outlet 130, the coolant separated by the gas-liquid separation can be discharged outside the device body 100 through the hydrophobic element 300, so as to achieve complete separation of coolant and compressed gas. At the same time, the discharged coolant can be recycled.

[0052] Specifically, in this embodiment, the condensate drain 300 is a condensate drain valve, also called an automatic drainer or condensate drainer. The condensate drain valve is installed at the end of the gas-liquid separation pipeline, and its function is to continuously discharge the liquid in the pipeline to the outside of the pipeline.

[0053] Reference Figure 2 As shown, the interstage cooling device 10 also includes a guide pipe 400, which is connected to the air outlet 130.

[0054] In this embodiment, one end of the guide pipe 400 is connected to the outlet 130, and the other end of the guide pipe 400 is connected to the inlet of the lower impeller 20 of the compression device. In this way, the compressed gas flowing out of the outlet 130 can be guided to the lower impeller 20 through the guide pipe 400. At the same time, the compressed gas can be stabilized through the guide pipe 400, so that the turbulent compressed gas flowing out of the outlet 130 can flow evenly to the lower impeller 20 after the stabilization effect of the guide pipe 400, thereby reducing the impact of the airflow on the lower impeller 20 and reducing the influence of the airflow on the rotation of the lower impeller 20.

[0055] Reference Figure 4 As shown, the guide pipe 400 is provided with multiple guide channels 410, which are spaced apart and arranged parallel to each other along the extension direction of the guide pipe 400.

[0056] In this embodiment, since the guide pipe 400 is provided with multiple guide channels 410, the compressed gas can be guided through the multiple guide channels 410. Since the multiple guide channels 410 are arranged parallel to the extension direction of the guide pipe 400, when the compressed gas flows through the multiple guide channels 410, the compressed gas can form a stable flow state within the multiple guide channels 410. This allows the turbulent compressed gas flowing out of the outlet 130 to flow evenly to the lower impeller 20 after the flow stabilization effect of the guide pipe 400, reducing flow loss. Furthermore, since the multiple guide channels 410 are arranged at intervals, the high-speed flowing gas will generate friction with the inner wall of each guide channel 410 and generate a certain amount of heat. This can play a certain role in reheating the cooled compressed gas, ensuring that the compressed gas has a certain temperature and preventing the compressed gas from condensing in the lower impeller 20, thus reducing damage to the lower impeller 20.

[0057] Continue to refer to Figure 4 As shown, the distance between any two adjacent flow channels 410 is L, which satisfies: 0.8mm≤L≤1mm.

[0058] Specifically, in this embodiment, the spacing L between any two adjacent flow channels 410 can be 0.8mm, 0.9mm, 1mm, etc.

[0059] In this embodiment, if the distance L between any two adjacent guide channels 410 is less than 0.8 mm, the distance between any two adjacent guide channels 410 will be too small, which will increase the manufacturing difficulty and cost of the six channels and reduce the service life of the guide tube 400. If the distance L between any two adjacent guide channels 410 is greater than 0.1 mm, the distance between any two adjacent guide channels 410 will be too large, which will affect the flow area of ​​the compressed gas in the guide tube 400, reduce the flow velocity and flow rate of the compressed gas in the guide tube 400, and affect the operating efficiency of the compression equipment. When the distance L between any two adjacent guide channels 410 satisfies: 0.8 mm ≤ L ≤ 1 mm, it can meet the manufacturing requirements of the guide tube 400 and reduce the impact on the flow velocity and flow rate of the compressed gas in the guide tube 400.

[0060] The compression device involved in the embodiments of this application includes: a multi-stage impeller 20 and the interstage cooling device 10 described above.

[0061] Specifically, an interstage cooling device 10 is provided between any two impellers 20.

[0062] It should be noted that the gas compressed by the first-stage impeller 20 of the compressor needs to be cooled before entering the next-stage impeller 20 for compression. This is because the temperature and pressure of the gas after compression by the centrifugal impeller 20 are very high. According to the principle of centrifugal compressors, the higher the gas temperature, the lower the gas density, and the greater the volumetric flow rate corresponding to the same mass flow rate. According to the continuity equation of liquid flow, the mass flow rate of the gas does not change throughout the compression process. When the temperature is higher, the volumetric flow rate is greater, and the impeller 20 needs to do more work to compress the same mass flow rate of gas, making it more difficult to compress. This leads to a decrease in the efficiency of the entire unit. Therefore, interstage cooling of the centrifugal compressor is a very important part of the entire compression process.

[0063] In the compression device of this application, the above-mentioned interstage cooling device 10 can be provided between any two impellers 20 to cool the compressed gas between any two impellers 20, thereby improving the compression efficiency of the compression device. Since the above-mentioned interstage cooling device 10 can improve the heat exchange efficiency and has a better cooling effect, the compression device of this application can have a higher gas compression efficiency.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0065] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An interstage cooling device, characterized in that, include: The device body is provided with an air inlet, a spiral flow channel and an air outlet. The air inlet and the air outlet are both connected to the spiral flow channel. The air inlet is located at the spiral starting point of the spiral flow channel and the air outlet is located at the spiral ending point of the spiral flow channel. A cooling component is connected to the main body of the device. The cooling component has a liquid outlet that is connected to the spiral flow channel and is located near the air inlet.

2. The interstage cooling device according to claim 1, characterized in that, The spiral radius of the spiral channel gradually decreases from the air inlet toward the air outlet.

3. The interstage cooling device according to claim 2, characterized in that, The flow area of ​​the spiral channel gradually decreases along the spiral line from the air inlet toward the air outlet.

4. The interstage cooling device according to claim 3, characterized in that, The interstage cooling device has a preset direction, and the spiral flow channel extends spirally around the preset direction. The device body includes a housing, the spiral flow channel is disposed in the housing, the air inlet and the air outlet are both opened on the housing, and the cross-sectional area of ​​the housing perpendicular to the preset direction gradually decreases towards the air outlet along the preset direction.

5. The interstage cooling device according to claim 1, characterized in that, The cooling assembly includes a cooling element and an atomizing element. The cooling element is connected to the device body. The liquid outlet is disposed on the cooling element, and the atomizing element is disposed at the liquid outlet and is used to atomize the coolant flowing out through the liquid outlet.

6. The interstage cooling device according to claim 1, characterized in that, The interstage cooling device also includes a hydrophobic element, which is connected to the device body and positioned near the air outlet.

7. The interstage cooling device according to claim 1, characterized in that, The interstage cooling device also includes a guide pipe, which is connected to the air outlet.

8. The interstage cooling device according to claim 7, characterized in that, The guide tube is provided with multiple guide channels, which are spaced apart and arranged parallel to each other along the extension direction of the guide tube.

9. The interstage cooling device according to claim 8, characterized in that, The distance between any two adjacent flow channels is L, which satisfies: 0.8mm≤L≤1mm.

10. A compression device, characterized in that, include: Multistage impeller; The interstage cooling device as described in any one of claims 1-9, wherein the interstage cooling device is provided between any two stages of the impeller.

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