Centrifugal air compressor heat recovery heat exchanger and heat recovery system
By designing a combined heat recovery heat exchanger with circulation pipes and heat recovery pipes, the problem of low heat recovery efficiency in existing technologies is solved, achieving efficient heat recovery and stable operation, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG DIVITE MECHANICAL & ELECTRICAL EQUIPMENT CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-07-24
AI Technical Summary
Existing centrifugal air compressor heat recovery methods are inefficient, requiring increased heat pump energy consumption or external heat exchangers, which increases costs and affects the efficiency and stable operation of the air compressor.
Design an air compressor heat recovery heat exchanger that includes circulation pipes and heat recovery pipes. The combination of circulation pipes and heat recovery pipes enables efficient heat recovery. Combined with a cooling tower, insulated water tank, and protective heat exchanger, it realizes high-temperature air heat exchange and graded heat recovery.
It improves heat recovery efficiency, reduces installation costs, eliminates the need for external air ducts, achieves high-temperature air heat exchange and graded heat recovery, and ensures stable system operation.
Smart Images
Figure CN224552166U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of industrial waste heat recovery technology, and in particular to a centrifugal air compressor heat recovery heat exchanger and heat recovery system. Background Technology
[0002] The centrifugal air compressor generates a large amount of heat during the air compression process. The heat is exchanged between the compressor and the circulating water through a cooler. After the heat exchange, the circulating water enters a cooling tower, which dissipates the heat of the circulating water into the atmosphere.
[0003] Currently, the common method for heat recovery in centrifugal air compressors is to partially close valves to increase the outlet water temperature. However, the quality of the recovered heat is relatively low, generally resulting in low-temperature hot water. Otherwise, it will affect the interstage intake temperature of the air compressor, impacting its operating efficiency and stability. If higher-temperature hot water is required, a heat pump needs to be added to raise the temperature, increasing energy consumption. Increasing the outlet water temperature through an external, independent heat exchanger requires extending the air ducts from the air compressor, increasing installation costs and also increasing interstage pressure losses, thus affecting air compressor efficiency.
[0004] Therefore, in order to address the above problems, a centrifugal air compressor heat recovery heat exchanger and heat recovery system are proposed to solve these problems. Utility Model Content
[0005] This invention addresses the shortcomings of existing technologies by developing a centrifugal air compressor heat recovery heat exchanger and heat recovery system. This invention features high heat recovery efficiency, low installation cost, and eliminates the need for external air ducts, enabling high-temperature air heat exchange and graded heat recovery.
[0006] The technical solution to the technical problem solved by this utility model is as follows: This utility model provides a centrifugal air compressor heat recovery heat exchanger, including a cavity and a cooler core. The cooler core includes a core body and a front tube plate and a rear tube plate respectively disposed at the front and rear ends of the core body. The cooler core is inserted into the cavity and divides the cavity into an air inlet and an air outlet. The core body includes a circulation pipe and a heat recovery pipe. A front end cover and a rear end cover are respectively disposed at the front and rear ends of the cavity. An air inlet hole communicating with the air inlet and an air outlet hole communicating with the air outlet are respectively disposed on the rear end cover. A circulation flange assembly communicating with the circulation pipe and a heat recovery flange assembly communicating with the heat recovery pipe are disposed on the front end cover.
[0007] As an optimization, four flow channels are vertically opened on the inner wall of the front cover near the front tube sheet. The circulation flange assembly includes a circulation water inlet flange and a circulation water outlet flange, and the heat recovery flange assembly includes a heat recovery water inlet flange and a heat recovery water outlet flange. The circulation water inlet flange, circulation water outlet flange, heat recovery water inlet flange, and heat recovery water outlet flange are respectively connected to the four flow channels.
[0008] As an optimization, mounting slots are provided on both the upper and lower walls of the cavity, and mounting strips that are compatible with the mounting slots are provided on the top and bottom of the cooler core.
[0009] As an optimization, several through holes are provided on the front tube sheet. The number of through holes is twice the number of circulation pipes and heat recovery pipes. The input and output ends of the circulation pipes and heat recovery pipes are both set through the through holes. The circulation pipes are located on the right side of the front tube sheet, and the heat recovery pipes are located on the left side of the front tube sheet.
[0010] As an optimization, the circulating water inlet flange, circulating water outlet flange, heat recovery water inlet flange, and heat recovery water outlet flange are each connected to the circulating pipe inlet end, circulating pipe outlet end, heat recovery pipe inlet end, and heat recovery pipe outlet end via a flow channel.
[0011] A heat recovery system includes the centrifugal air compressor heat recovery heat exchanger described above, and also includes a cooling tower and an insulated water tank. The cooling tower inlet is connected to a circulating water outlet flange via a pipeline, and the cooling tower outlet is connected to a heat recovery water inlet flange and a circulating water inlet flange via a pipeline. The insulated water tank inlet is connected to a heat recovery water outlet flange via a pipeline, and the insulated water tank outlet is connected to the cooling tower inlet via a pipeline.
[0012] It also includes a protective heat exchanger and a heat exchanger for use. The heat recovery water outlet flange is connected to the heat exchanger for use via a pipeline and then connected to the insulated water tank. The output end of the insulated water tank is connected to the heat exchanger for use and the protective heat exchanger in sequence via a pipeline and then connected to the input end of the cooling tower. The output end of the cooling tower is connected to the protective heat exchanger via a pipeline and then connected to the heat recovery water inlet flange.
[0013] As an optimization, water pumps are installed at the output ends of the insulated water tank, cooling tower, and protective heat exchanger.
[0014] The effects provided in the utility model description are merely those of the embodiments, and not all the effects of the utility model. The above technical solution has the following advantages or beneficial effects: 1. This heat recovery heat exchanger uses a circulation pipe and a heat recovery pipe to perform heat exchange, which is based on the original circulation pipe. It has high heat recovery efficiency, low installation cost, and does not require external air ducts, thus realizing high-temperature air heat exchange and graded heat recovery. 2. The flow channel separates the circulating water path and the heat recovery water path, enabling efficient distribution of the medium; 3. The cooler core is installed by mounting strips that fit into the mounting slots of the cavity, allowing for quick assembly and disassembly, facilitating the secure installation and maintenance of the core. Attached Figure Description
[0015] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.
[0016] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a cross-sectional view of the core body of this utility model; Figure 3 This is a front view of the rear end cover of this utility model; Figure 4 This is a front view of the front tube sheet or rear tube sheet of this utility model; Figure 5 This is a rear view of the front cover of this utility model; Figure 6 This is a left view of the front cover of this utility model; Figure 7 This is a flowchart of the heat recovery system of this utility model.
[0017] In the diagram, 1. Cavity; 2. Cooler core; 3. Core body; 4. Front tube sheet; 5. Rear tube sheet; 6. Front end cover; 7. Rear end cover; 8. Air inlet; 9. Air outlet; 10. Circulation pipe; 11. Heat recovery pipe; 12. Flow channel; 13. Circulation water inlet flange; 14. Circulation water outlet flange; 15. Heat recovery water inlet flange; 16. Heat recovery water outlet flange; 17. Mounting groove; 18. Mounting strip; 19. Pipeline through hole; 20. Cooling tower; 21. Insulated water tank; 22. Protective heat exchanger; 23. Utilizing heat exchanger; 24. Water pump. Detailed Implementation
[0018] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. The present invention omits descriptions of well-known components and processing techniques and processes to avoid unnecessarily limiting the present invention. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0019] Example 1: This embodiment provides a heat recovery heat exchanger for a centrifugal air compressor, such as 1- Figure 4As shown, the device includes a cavity 1 and a cooler core 2. The cooler core 2 includes a core body 3 and a front tube plate 4 and a rear tube plate 5 respectively disposed at the front and rear ends of the core body 3. The cooler core 2 is inserted into the cavity 1, dividing the cavity 1 into an air inlet section and an air outlet section. The core body 3 includes a circulation pipe 10 and a heat recovery pipe 11. A front end cover 6 and a rear end cover 7 are respectively disposed at the front and rear ends of the cavity 1. The rear end cover 7 is provided with an air inlet hole 8 communicating with the air inlet section and an air outlet hole 9 communicating with the air outlet section. The front end cover 6 is provided with a circulation flange assembly communicating with the circulation pipe 10 and a heat recovery flange assembly communicating with the heat recovery pipe 11. The circulation pipe 10 and the heat recovery pipe 11 can be made of stainless steel corrugated pipes to enhance heat exchange efficiency. The front tube plate 4 and the rear tube plate 5 are connected to the front end cover 6 and the rear end cover 7 by bolts and sealed by sealing rings. This heat recovery heat exchanger uses a circulation pipe 10 and a heat recovery pipe 11 to perform heat exchange, based on the original circulation pipe 10. It has high heat recovery efficiency, low installation cost, and does not require external air ducts.
[0020] Four flow channels 12 are vertically opened on the inner wall of the front cover 6 near the front tube plate 4. The circulation flange assembly includes a circulation water inlet flange 13 and a circulation water outlet flange 14. The heat recovery flange assembly includes a heat recovery water inlet flange 15 and a heat recovery water outlet flange 16. The circulation water inlet flange 13, circulation water outlet flange 14, heat recovery water inlet flange 15 and heat recovery water outlet flange 16 are respectively connected to the four flow channels 12. The flow channels 12 separate the circulation water path and the heat recovery water path to achieve efficient distribution of the medium.
[0021] The cavity 1 has mounting grooves 17 on its top and bottom walls. The cooler core 2 has mounting strips 18 on its top and bottom that are compatible with the mounting grooves 17. The cooler core 2 can be quickly installed and removed by the mounting strips 18 cooperating with the mounting grooves 17 of the cavity 1, which facilitates the stable installation and disassembly maintenance of the core.
[0022] Example 2: This embodiment is a further improvement on embodiment 1, such as... Figures 5-6 As shown, the circulating water inlet flange 13, circulating water outlet flange 14, heat recovery water inlet flange 15, and heat recovery water outlet flange 16 are each connected to the inlet end of the circulating pipe 10, the outlet end of the circulating pipe 10, the inlet end of the heat recovery pipe 11, and the outlet end of the heat recovery pipe 11 through a flow channel 12.
[0023] A number of through holes 19 are provided on the front tube sheet 4. The number of through holes 19 is twice the number of circulation pipes 10 and heat recovery pipes 11. The input and output ends of circulation pipes 10 and heat recovery pipes 11 are both set through the through holes 19. Circulation pipes 10 are located on the right side of the front tube sheet 4, and heat recovery pipes 11 are located on the left side of the front tube sheet 4.
[0024] Example 3: This embodiment provides a heat recovery system, including the centrifugal air compressor heat recovery heat exchanger described above, such as... Figure 7 As shown, it also includes a cooling tower 20 and an insulated water tank 21. The input end of the cooling tower 20 is connected to the circulating water outlet flange 14 through a pipeline, and the output end of the cooling tower 20 is connected to the heat recovery water inlet flange 15 and the circulating water inlet flange 13 through a pipeline. The input end of the insulated water tank 21 is connected to the heat recovery water outlet flange 16 through a pipeline, and the output end of the insulated water tank 21 is connected to the input end of the cooling tower 20 through a pipeline.
[0025] It also includes a protective heat exchanger 22 and a heat exchanger 23. The heat recovery water outlet flange 16 is connected to the heat exchanger 23 via a pipeline and then connected to the insulated water tank 21. The output end of the insulated water tank 21 is connected to the heat exchanger 23 and the protective heat exchanger 22 in sequence via a pipeline and then connected to the input end of the cooling tower 20. The output end of the cooling tower 20 is connected to the protective heat exchanger 22 via a pipeline and then connected to the heat recovery water inlet flange 15.
[0026] The protective heat exchanger 22 can be a plate heat exchanger, which has high heat dissipation efficiency and small footprint. By optimizing the pipeline connection method, heat can be utilized in a cascade manner. At the same time, the protective heat exchanger 22 is set to ensure the safe operation of the system under over-temperature or low-load conditions.
[0027] Water pumps 24 are installed at the output ends of the insulated water tank 21, the cooling tower 20, and the protective heat exchanger 22. The insulated water tank 21 is equipped with a temperature sensor, which is linked to the water pump 24 for control. The specific control structure is existing technology and will not be described in detail here.
[0028] like Figure 7 As shown, this system can be configured with three stages of air compression, i.e., three sets of heat recovery heat exchangers. Air enters the intake section through the air inlet 8 of the first-stage heat recovery heat exchanger, flows through the cooler core 2 of the first-stage heat recovery heat exchanger and enters the outlet section, and then flows out through the outlet 9. It then enters the second-stage air compression, enters the intake section through the air inlet 8 of the second-stage heat recovery heat exchanger, flows through the cooler core 2 of the second-stage heat recovery heat exchanger and enters the outlet section, and then flows out through the outlet 9. It then enters the third-stage air compression, enters the intake section through the air inlet 8 of the third-stage heat recovery heat exchanger, flows through the cooler core 2 of the third-stage heat recovery heat exchanger and enters the outlet section, and then is discharged through the outlet 9.
[0029] Work process: 1. High-temperature air heat exchange: Compressed air enters the cavity 1 through the air inlet 8. When it flows through the cooler core 2, the heat is absorbed by the circulation pipe 10 and the heat recovery pipe 11. After cooling, it is discharged from the air outlet 9.
[0030] 2. Heat recovery in stages: High-temperature heat is transferred from the output end of the circulation pipe 10 to the cooling tower 20. After being partially cooled, it returns to the protection heat exchanger 22, while the rest enters the input end of the circulation pipe 10.
[0031] Medium-temperature heat is transferred to the heat exchanger 23 through the output end of the heat recovery pipe 11 and then enters the insulated water tank 21 for use in the production process. If the temperature is still too high, it can continue to enter the cooling tower 20 for cooling.
[0032] Although the specific embodiments of the utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the utility model. Based on the technical solution of the utility model, various modifications or variations that can be made by those skilled in the art without creative effort are still within the scope of protection of the utility model.
Claims
1. A centrifugal air compressor heat recovery heat exchanger, comprising a cavity (1) and a cooler core (2), characterized in that: The cooler core (2) includes a core body (3) and a front tube plate (4) and a rear tube plate (5) respectively disposed at the front and rear ends of the core body (3). The cooler core (2) is inserted into the cavity (1) and divides the cavity (1) into an air inlet and an air outlet. The core body (3) includes a circulation pipe (10) and a heat recovery pipe (11). The cavity (1) is provided with a front end cover (6) and a rear end cover (7) at the front and rear ends respectively. The rear end cover (7) is provided with an air inlet (8) connected to the air inlet and an air outlet (9) connected to the air outlet. The front end cover (6) is provided with a circulation flange assembly connected to the circulation pipe (10) and a heat recovery flange assembly connected to the heat recovery pipe (11).
2. The centrifugal air compressor heat recovery heat exchanger according to claim 1, characterized in that: Four flow channels (12) are vertically opened on the inner wall of the front cover (6) near the front tube sheet (4). The circulation flange assembly includes a circulation water inlet flange (13) and a circulation water outlet flange (14). The heat recovery flange assembly includes a heat recovery water inlet flange (15) and a heat recovery water outlet flange (16). The circulation water inlet flange (13), circulation water outlet flange (14), heat recovery water inlet flange (15) and heat recovery water outlet flange (16) are respectively connected to the four flow channels (12).
3. The centrifugal air compressor heat recovery heat exchanger according to claim 2, characterized in that: The cavity (1) has mounting grooves (17) on its upper top wall and lower bottom wall, and the cooler core (2) has mounting strips (18) on its top and bottom that are compatible with the mounting grooves (17).
4. The centrifugal air compressor heat recovery heat exchanger according to claim 3, characterized in that: A number of through holes (19) are provided on the front tube sheet (4). The number of through holes (19) is twice the number of circulation pipe (10) and heat recovery pipe (11). The input and output ends of circulation pipe (10) and heat recovery pipe (11) are both set through the through holes (19). Circulation pipe (10) is located on the right side of front tube sheet (4), and heat recovery pipe (11) is located on the left side of front tube sheet (4).
5. The centrifugal air compressor heat recovery heat exchanger according to claim 4, characterized in that: The circulating water inlet flange (13), circulating water outlet flange (14), heat recovery water inlet flange (15), and heat recovery water outlet flange (16) are each connected to the inlet end of the circulating pipe (10), the outlet end of the circulating pipe (10), the inlet end of the heat recovery pipe (11), and the outlet end of the heat recovery pipe (11) through a flow channel (12).
6. A heat recovery system comprising the centrifugal air compressor heat recovery heat exchanger as described in claim 5, characterized in that: It also includes a cooling tower (20) and an insulated water tank (21). The input end of the cooling tower (20) is connected to the circulating water outlet flange (14) through a pipeline. The output end of the cooling tower (20) is connected to the heat recovery water inlet flange (15) and the circulating water inlet flange (13) through a pipeline. The input end of the insulated water tank (21) is connected to the heat recovery water outlet flange (16) through a pipeline. The output end of the insulated water tank (21) is connected to the input end of the cooling tower (20) through a pipeline.
7. The heat recovery system according to claim 6, characterized in that: It also includes a protective heat exchanger (22) and a heat exchanger (23). The heat recovery water outlet flange (16) is connected to the heat exchanger (23) via a pipeline and then connected to the insulated water tank (21). The output end of the insulated water tank (21) is connected to the heat exchanger (23) and the protective heat exchanger (22) in sequence via a pipeline and then connected to the input end of the cooling tower (20). The output end of the cooling tower (20) is connected to the protective heat exchanger (22) via a pipeline and then connected to the heat recovery water inlet flange (15).
8. The heat recovery system according to claim 7, characterized in that: Water pumps (24) are installed at the output ends of the insulated water tank (21), cooling tower (20) and protective heat exchanger (22).