High-pressure-bearing ultrahigh NTU plate heat exchanger
By improving the structure and detection system of the plate heat exchanger, the problem of uneven fluid distribution under high NTU value conditions was solved, achieving efficient heat exchange and stable equipment operation, and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG FEIYANG ENERGY SAVING TECH CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-04-24
AI Technical Summary
Existing plate heat exchangers suffer from uneven fluid distribution under high NTU values, leading to uneven heat exchange in certain areas and equipment redundancy, thus increasing procurement costs.
It employs components such as support plates, upper guide rods, fixed clamping plates, sealing mechanisms, spiral baffles, and detection systems to improve fluid distribution and monitoring, ensuring uniform fluid flow between plates, improving heat transfer efficiency, and monitoring equipment status in real time for easy maintenance.
This achieves uniform fluid distribution between the plates, improves heat exchange efficiency, reduces equipment downtime due to malfunctions, and lowers maintenance costs.
Smart Images
Figure CN224163063U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plate heat exchanger technology, and in particular to a high-pressure-bearing ultra-high NTU plate heat exchanger. Background Technology
[0002] Currently, some extremely harsh operating conditions have emerged in the heating industry, resulting in large logarithmic mean temperature differences and consequently high calculated NTU values. According to design manuals for conventional plate heat exchangers and local heating conditions, the typical NTU value is 2-8. However, the calculated NTU value in the aforementioned conditions reaches 12, significantly exceeding the usability range of conventional products. The conventional solution for this situation is to use multiple plate heat exchangers in series, but this inevitably leads to equipment redundancy and increased procurement costs for customers. It is understood that due to energy shortages, heating companies in various regions will further reduce primary heating temperatures, making this high NTU situation even more prevalent.
[0003] Plate heat exchangers operate on the principle of temperature difference between hot and cold fluids, transferring heat through metal plates. The hot and cold fluids flow in channels on either side of the plates, with heat transferred from the high-temperature fluid side to the low-temperature fluid side. Their structure typically consists of plates, gaskets, and a frame. The corrugated design on the plates increases fluid turbulence and improves the heat transfer coefficient, while the gaskets prevent leakage. The frame is used for assembling and securing the plates.
[0004] In existing technologies, some heat exchangers experience a concentrated influx of fluid into certain channels at the fluid inlet, while other channels suffer from insufficient fluid flow. Furthermore, eddies or dead zones can easily form at corners or narrow sections of the channels, preventing the fluid in these areas from fully participating in heat exchange. To address these issues, a high-pressure, ultra-high NTU plate heat exchanger is proposed. Utility Model Content
[0005] To overcome the above deficiencies, this utility model provides a high-pressure, ultra-high NTU plate heat exchanger, aiming to improve the problem of uneven fluid distribution in some heat exchangers in the prior art.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A high-pressure, ultra-high NTU plate heat exchanger includes a support plate, an upper guide rod fixedly connected to the top of the support plate, multiple detection mechanisms arranged outside the upper guide rod, a fixed clamping plate fixedly connected to the bottom of the upper guide rod, a sealing mechanism arranged outside the fixed clamping plate, a pushing assembly for pushing the support plate, the sealing mechanism including a sealing ring, the sealing ring being fixedly connected to the outside of the fixed clamping plate, a heat exchange assembly arranged outside the sealing ring, a fixing ring being fixedly connected to the outside of the fixed clamping plate, a connection port being fixedly connected to the outside of the fixing ring, and a spiral baffle plate being fixedly connected inside the connection port.
[0008] As a further description of the above technical solution:
[0009] The detection mechanism includes a connection control block, which is fixedly connected to the outside of the upper guide rod. An indicator light is fixedly connected to the top of the connection control block, and a detection scanning head is fixedly connected to the bottom of the connection control block.
[0010] As a further description of the above technical solution:
[0011] The heat exchange assembly includes multiple plates, the outer surfaces of which are slidably connected to the outside of the sealing ring, and gaskets are fixedly connected between the multiple plates.
[0012] As a further description of the above technical solution:
[0013] The top of the plate is slidably connected to the bottom of the upper guide rod, and the bottom of the plate is slidably connected to the lower guide rod. The lower guide rod is fixedly connected to the outside of the bottom of the fixed clamping plate, and the other end of the fixed clamping plate is fixedly connected to the bottom of the support plate.
[0014] As a further description of the above technical solution:
[0015] A movable clamping plate is fixedly connected to the outside of the plate, i.e. the side closest to the support plate. Notches are opened on both sides of the movable clamping plate, and a notch is opened on the outside of the fixed clamping plate. Clamping bolts are slidably connected to the outside of the notches of the fixed clamping plate and the outside of the notches of the movable clamping plate.
[0016] As a further description of the above technical solution:
[0017] The pushing component includes a motor, which is externally fixedly connected to the outside of the support plate. The driving end of the motor is fixedly connected to a pushing disk, which is externally fixedly connected to the outside of the movable clamping plate.
[0018] This utility model has the following beneficial effects:
[0019] 1. In this utility model, by increasing the contact area between the fluid and the plates, the NTU value is improved, thereby achieving efficient heat exchange. The spiral turbulence plate turbulently disturbs the medium before it enters the flow channel between the plates, so that the medium initially forms a turbulent state. Combined with the low corrugation and auxiliary deep corrugation design of the plates, the disturbance effect is further enhanced, ensuring that the fluid is evenly distributed in the entire flow channel, avoiding uneven local heat exchange, so that each plate can give full play to the heat exchange function, and improving the overall heat exchange efficiency of the heat exchanger.
[0020] 2. In this utility model, the real-time monitoring system composed of the detection scanning head, the connection control block and the display light can monitor key components such as plates and gaskets in all aspects, promptly detect potential problems and issue warning signals, so as to facilitate staff to quickly locate faults, formulate maintenance strategies, reduce equipment downtime, improve production efficiency and reduce maintenance costs. Attached Figure Description
[0021] Figure 1 This is a three-dimensional schematic diagram of a high-pressure-bearing ultra-high NTU plate heat exchanger proposed in this utility model;
[0022] Figure 2 This is a schematic diagram of the plate structure of a high-pressure-bearing ultra-high NTU plate heat exchanger proposed in this utility model;
[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle;
[0024] Figure 4 This is a schematic diagram of the drive plate of a high-pressure ultra-high NTU plate heat exchanger proposed in this utility model.
[0025] Legend:
[0026] 1. Support plate; 2. Upper guide rod; 3. Movable clamping plate; 4. Connection port; 5. Clamping bolt; 6. Gasket; 7. Plate; 8. Sealing ring; 9. Fixing ring; 10. Spiral baffle; 11. Motor; 12. Push plate; 13. Indicator light; 14. Connecting control block; 15. Detection scanning head; 16. Fixed clamping plate; 17. Lower guide rod. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Reference Figures 1 to 3 This utility model provides an embodiment of a high-pressure-bearing ultra-high NTU plate heat exchanger, including a support plate 1. The support plate 1 serves as the supporting foundation for the entire heat exchanger, ensuring that the equipment remains structurally stable during operation and can withstand the weight of the equipment itself as well as the pressure load during operation. An upper guide rod 2 is fixedly connected to the top of the support plate 1. The upper guide rod 2 provides an installation position for the detection mechanism and provides guidance for the sliding of the plates 7, ensuring that the plates 7 can be accurately aligned during installation and disassembly, and also enhancing the overall structural rigidity of the equipment. Multiple detection mechanisms are provided on the outside of the upper guide rod 2. A fixing and pressing plate 16 is fixedly connected to the bottom of the upper guide rod 2. A sealing mechanism is provided on the outside of the fixing and pressing plate 16. A pushing component for pushing is provided on the outside of the support plate 1.
[0029] The sealing mechanism includes a sealing ring 8, which fits tightly with the plate 7 to prevent leakage of the heat exchange medium from the connection between the plate 7 and the fixed pressure plate 16, ensuring that the medium flows in a closed channel and improving the sealing performance of the equipment. The sealing ring 8 is externally fixedly connected to the outside of the fixed pressure plate 16, and a heat exchange component is provided outside the sealing ring 8. A fixing ring 9 is externally fixedly connected to the fixed pressure plate 16, which is used to fix the connection port 4, enhance the connection strength between the connection port 4 and the fixed pressure plate 16, and ensure the sealing and stability of the medium at the inlet and outlet. The connection port 4 is externally fixedly connected to the fixing ring 9. The connection port 4 is the channel for the hot and cold medium to enter and exit the heat exchanger. The spiral baffle 10 inside it initially agitates the entering medium, so that the medium enters... A certain degree of turbulence is formed in front of the flow channel between the plates 7, which creates conditions for subsequent efficient heat exchange. A spiral baffle 10 is fixedly connected inside the connection port 4. The spiral baffle 10 is used to pre-disturb the medium in the connection port 4, change the flow state of the medium, make it turbulent, increase the mixing degree of the medium, improve the heat transfer efficiency, and at the same time help to evenly distribute the medium flow rate and avoid local flow velocity being too fast or too slow. The heat exchange assembly includes multiple plates 7. The outside of the plates 7 is slidably connected to the outside of the sealing ring 8. Gaskets 6 are fixedly connected between the multiple plates 7. Gaskets 6 are used to further enhance the sealing between the plates 7, prevent medium leakage, ensure sealing performance under high pressure, and also play a certain buffering role to reduce friction and wear between the plates 7.
[0030] Reference Figure 1 , Figure 2 and Figure 4The testing mechanism includes a connection control block 14, which is the core control unit of the testing system. It receives data transmitted from the testing scanning head 15, analyzes and processes it, and determines whether the equipment is operating normally according to preset standards. The connection control block 14 is externally fixedly connected to the upper guide rod 2. An indicator light 13 is fixedly connected to the top of the connection control block 14. The indicator light 13 is used to visually display the equipment's operating status, such as normal operation, to the operator through light signals of different colors or flashing frequencies, based on the analysis results of the connection control block 14. For abnormal warnings or fault alarms, a detection scanning head 15 is fixedly connected to the bottom of the connection control block 14. The detection scanning head 15 is used to scan and detect the plate 7 and gasket 6 in real time. Utilizing advanced sensing technology, it monitors the operating status, wear level, and potential leakage of the components, and transmits the data to the connection control block 14 in a timely manner. The top of the plate 7 is slidably connected to the bottom of the upper guide rod 2, and the bottom of the plate 7 is slidably connected to the lower guide rod 17. The lower guide rod 17 is fixedly connected to the outside of the bottom of the fixed clamping plate 16. The other side of the fixed clamping plate 16... One end is fixedly connected to the outer bottom side of the support plate 1. A movable clamping plate 3 is fixedly connected to the outer side of the plate 7, i.e., the side closest to the support plate 1. The movable clamping plate 3 is slidably connected to the fixed clamping plate 16 via clamping bolts 5. It can slide along the clamping bolts 5 under the action of the pushing component to adjust the clamping degree of the plate 7 group to adapt to different working pressures and working conditions. Notches are opened on both sides of the movable clamping plate 3, and a notch is opened on the outer side of the fixed clamping plate 16. The fixed clamping plate 16 is fixedly connected to the upper guide rod 2 and the lower guide rod 17 to form a stable frame structure for sealing. The sealing mechanism and heat exchange components provide support and fixation, ensuring the stability of the overall structure of the equipment under high pressure. Clamping bolts 5 are slidably connected to the outside of the notch of the fixed pressure plate 16 and the outside of the notch of the movable pressure plate 3. The clamping bolts 5 are used to pass through the notches of the fixed pressure plate 16 and the movable pressure plate 3, connecting the two together and providing a track for the sliding of the movable pressure plate 3. At the same time, during the operation of the equipment, the clamping degree of the plate group 7 can be adjusted by tightening or loosening the clamping bolts 5, ensuring the sealing performance and structural stability of the equipment under different pressures.
[0031] The pushing assembly includes a motor 11, which is externally fixedly connected to the outside of the support plate 1. The driving end of the motor 11 is fixedly connected to a pushing disk 12, which is used to push the pushing disk 12. The pushing disk 12 is externally fixedly connected to the outside of the movable clamping plate 3.
[0032] Working principle: Hot and cold media enter the heat exchanger through the connection port 4 fixed by the fixing ring 9. When the media enters the connection port 4, the spiral baffle 10 initially agitates it, so that the media generates a certain degree of turbulence before entering the flow channel between the plates 7. After the media enters the flow channel between the plates 7, the low ripples and auxiliary deep ripples on the surface of the plates 7 achieve a high NTU value, further enhance the turbulence of the media, thin the boundary layer, improve the heat transfer coefficient, and achieve efficient heat exchange. The gasket 6 and the sealing ring 8 fit tightly to prevent media leakage and ensure sealing performance under high pressure.
[0033] The detection scanning head 15 scans and detects the plate 7 and gasket 6 in real time to monitor their operating status, wear, and potential leakage. The detection data is transmitted to the connection control block 14 in real time. The connection control block 14 analyzes and processes the data. If an abnormality is detected, such as damage to the plate 7 or sealing failure of the gasket 6, the connection control block 14 controls the indicator light 13 to emit a warning signal of the corresponding color or flashing frequency to remind the staff to check and repair.
[0034] When the system pressure changes, the motor 11 drives the push plate 12 to rotate, which in turn pushes the movable clamping plate 3 to slide between the upper guide rod 2 and the lower guide rod 17 and on the clamping bolt 5, changing the clamping degree of the plate 7 group. If the pressure increases, the movable clamping plate 3 moves closer to the fixed clamping plate 16 to further clamp the plate 7 and the gasket 6, enhance the sealing effect, and ensure that the equipment operates stably under high pressure. If the pressure decreases, the movable clamping plate 3 moves away from the fixed clamping plate 16 to avoid damage to the plate 7 and the gasket 6 due to excessive clamping.
[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A high-pressure, ultra-high NTU plate heat exchanger, comprising a support plate (1), characterized in that: The top of the support plate (1) is fixedly connected to an upper guide rod (2), and multiple detection mechanisms are provided on the outside of the upper guide rod (2). The bottom of the upper guide rod (2) is fixedly connected to a fixed pressing plate (16), and a sealing mechanism is provided on the outside of the fixed pressing plate (16). A pushing component for pushing is provided on the outside of the support plate (1). The sealing mechanism includes a sealing ring (8), which is fixedly connected to the outside of the fixed pressing plate (16). A heat exchange component is provided outside the sealing ring (8). A fixing ring (9) is fixedly connected to the outside of the fixed pressing plate (16). A connection port (4) is fixedly connected to the outside of the fixing ring (9). A spiral baffle (10) is fixedly connected inside the connection port (4).
2. The high-pressure ultra-high NTU plate heat exchanger according to claim 1, characterized in that: The detection mechanism includes a connection control block (14), which is fixedly connected to the outside of the upper guide rod (2). An indicator light (13) is fixedly connected to the top of the connection control block (14), and a detection scanning head (15) is fixedly connected to the bottom of the connection control block (14).
3. A high-pressure, ultra-high NTU plate heat exchanger according to claim 2, characterized in that: The heat exchange assembly includes multiple plates (7), the outside of which the plates (7) are slidably connected to the outside of the sealing ring (8), and gaskets (6) are fixedly connected between the multiple plates (7).
4. A high-pressure, ultra-high NTU plate heat exchanger according to claim 3, characterized in that: The top of the plate (7) is slidably connected to the bottom of the upper guide rod (2), and the bottom of the plate (7) is slidably connected to the lower guide rod (17). The lower guide rod (17) is fixedly connected to the outside of the bottom of the fixed clamping plate (16), and the other end of the fixed clamping plate (16) is fixedly connected to the bottom of the support plate (1).
5. A high-pressure, ultra-high NTU plate heat exchanger according to claim 3, characterized in that: A movable clamping plate (3) is fixedly connected to the outside of the plate (7), that is, the side closest to the support plate (1). The movable clamping plate (3) has notches on both sides, and the fixed clamping plate (16) has a notch on the outside. A clamping bolt (5) is slidably connected to the outside of the notch of the fixed clamping plate (16) and the outside of the notch of the movable clamping plate (3).
6. A high-pressure, ultra-high NTU plate heat exchanger according to claim 5, characterized in that: The pushing assembly includes a motor (11), which is fixedly connected to the outside of the support plate (1). The driving end of the motor (11) is fixedly connected to a pushing disk (12), which is fixedly connected to the outside of the movable pressing plate (3).