A device for recovering waste gas heat energy
By incorporating a partition plate with an increased surface area and a reverse flow design within the hollow shell, the problems of blockage and difficult cleaning of circular tube heat exchangers are solved, resulting in a highly efficient and easy-to-clean waste gas heat recovery device.
Patent Information
- Application Number
- CN202522148793.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-11
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-10-11
AI Technical Summary
Existing circular tube heat exchangers are prone to clogging due to impurities in the waste gas when recovering heat energy from waste gas, and cleaning is difficult, resulting in a decrease in heat exchange efficiency.
A hollow shell with an enlarged surface area partition is used to form a first channel and a second channel. The exhaust gas and heat exchange gas flow in opposite directions, increasing the heat exchange area and creating turbulence. At the same time, cleaning devices are installed at the top and bottom of the shell to increase the travel of the cleaning medium.
It improves heat exchange efficiency, prevents channel blockage, simplifies the cleaning process, and achieves efficient and easy-to-clean waste gas heat recovery.
Smart Images
Figure CN224681406U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of energy conservation and environmental protection, and in particular to a device for recovering heat energy from waste gas. Background Technology
[0002] Modern industrial production processes (such as metallurgy, chemical engineering, and glass manufacturing) generate large amounts of waste gas, typically with temperatures between 100°C and 500°C. Traditionally, this waste gas is directly released into the atmosphere, resulting in significant energy waste and exacerbating environmental pollution. It is estimated that nearly half of the waste heat resources wasted in industrial sectors are in the form of waste heat from waste gas. Efficiently recovering this waste heat and utilizing it in other stages of modern industrial production would not only help companies achieve energy conservation, reduced operating costs, and improved competitiveness, but also facilitate subsequent waste gas treatment, thus protecting the environment.
[0003] In existing technologies for recovering waste gas, curved circular tubes are commonly used as heat exchanger tubes. The advantages of circular tube heat exchangers are low cost and better space utilization. However, circular tube heat exchangers also have the following problems: waste gas usually contains impurities such as waste oil and waste glue. These impurities are very easy to adhere to the inner wall of the heat exchanger tube, causing blockage. Since the diameter-length of the circular tube is relatively small, the diameter-cleaning stroke of the cleaning medium (such as water) is also relatively small, making it difficult for the cleaning medium to effectively clean the pipe. This makes it very difficult to remove the attached impurities. Summary of the Invention
[0004] Purpose of the utility model: The purpose of this utility model is to provide a device that can achieve efficient, easy-to-clean, and long-term recovery of heat energy from waste gas.
[0005] Technical Solution: The present invention discloses a device for recovering heat energy from waste gas, comprising a hollow shell. The shell includes a first side and a second side arranged opposite to each other. A first inlet and a first outlet are respectively provided on the first and second sides, as well as a second inlet and a second outlet. A plurality of partition plates with multiple faceted structures are vertically arranged within the inner cavity of the shell. These partition plates form a first channel and a second channel arranged at intervals. The ports at both ends of the first channel communicate with the first inlet and the first outlet, respectively. The ports at both ends of the second channel communicate with the second inlet and the second outlet, respectively. A plurality of top cleaning ports are provided at the top of the first channel, and a plurality of bottom cleaning ports are provided at the bottom of the first channel. A plurality of drain ports are provided at the bottom of the shell, and the bottom cleaning ports communicate with the drain ports. The first and second sides are preferably arranged along the length of the shell. The first inlet and the first outlet are used for the intake of high-temperature waste gas and the exhaust of low-temperature waste gas, respectively. The second inlet and the second outlet are used for the intake of low-temperature heat exchange gas and the exhaust of high-temperature heat exchange gas, respectively. The increased surface area structure not only increases the area of the partition plate, thereby increasing the heat exchange area, but also enables the exhaust gas or heat exchange gas to form turbulence during the flow process, thereby increasing the heat exchange efficiency.
[0006] Furthermore, a first sealing plate is provided at each end of the first channel, and a second sealing plate is provided at each end of the second channel. The first sealing plate is used to seal both ends of the first channel to prevent the first channel from communicating with the second inlet or the second outlet; the second sealing plate is used to seal both ends of the second channel to prevent the second channel from communicating with the first inlet or the first outlet, and to prevent the exhaust gas and heat exchange gas from flowing into each other.
[0007] Furthermore, the housing is provided with several channel isolation plates for isolating the ports at both ends of the first channel and the ports at both ends of the second channel. The two ends of the channel isolation plates abut against the inner wall of the housing and the isolation plate, respectively, and the channel isolation plates are disposed between the ports of the first channel and the ports of the second channel.
[0008] Furthermore, the cross-section of the augmented structure is, but is not limited to, an arc shape or a right angle shape.
[0009] Furthermore, the top of the inner cavity of the housing is provided with several top cleaning devices for spraying cleaning medium to clean the first channel, and the cleaning end of the top cleaning device corresponds to the top cleaning port.
[0010] Furthermore, the bottom of the inner cavity of the housing is provided with several bottom cleaning devices for spraying cleaning medium to clean the first channel, and the cleaning end of the bottom cleaning device corresponds to the bottom cleaning port.
[0011] Furthermore, a first inlet and a second outlet are provided on the first side, and a first outlet and a second inlet are provided on the second side. This design causes the exhaust gas and the heat exchange gas to flow in opposite directions, increasing heat exchange efficiency.
[0012] Furthermore, the first inlet is arranged above the second outlet, and the first outlet is arranged above the second inlet.
[0013] Furthermore, the width of the first channel is greater than the width of the second channel.
[0014] Beneficial Effects: Compared with the prior art, this utility model has the following advantages: 1. The partition plate of this utility model is provided with an increased surface area structure. The increased surface area structure can not only increase the area of the partition plate, thereby increasing the heat exchange area, but also make the exhaust gas or heat exchange gas form turbulence during the flow process, thereby increasing the heat exchange efficiency; 2. Under the action of the air pump with the same air pressure, in order to allow the gas to pass through, the width of the first channel and the second channel in this utility model will be larger than the diameter of the traditional circular heat exchange tube, thus making it easier to clean the channel later; 3. The separate cleaning devices in this utility model are set above and below the first channel, which makes the actual cleaning stroke of the cleaning medium equal to the height of the partition plate. This makes the width-cleaning stroke ratio of the cleaning medium larger than that of the circular tube heat exchanger, making it easier for the cleaning medium to effectively clean the channel, thereby preventing channel blockage. Attached Figure Description
[0015] Figure 1 This is a perspective view of the first embodiment of the present utility model.
[0016] Figure 2 This is a front view of the first embodiment of the present invention.
[0017] Figure 3 This is a top view of the first embodiment of the present invention.
[0018] Figure 4 for Figure 2 Sectional view along the AA direction.
[0019] Figure 5 for Figure 2 Sectional view in the BB direction.
[0020] Figure 6 for Figure 3 Sectional view in the CC direction.
[0021] Figure 7 This is an internal schematic diagram of the first embodiment of the present utility model.
[0022] Figure 8 This is a perspective view of the first partition plate in the first embodiment of the present invention.
[0023] Figure 9 This is a top view of the first partition plate in the first embodiment of this utility model.
[0024] Figure 10 This is a top view of the second partition plate in the second embodiment of this utility model.
[0025] The components are: 1. Shell; 101. Drain outlet; 2. First inlet; 3. Second outlet; 4. First outlet; 5. Second inlet; 6. Top cleaning pipe; 7. First sealing plate; 8. First channel; 9. Second channel; 10. Second sealing plate; 11. Bottom cleaning pipe; 12. Channel isolation plate; 13. First partition plate; 14. Second partition plate; 1401. First reinforcement structure; 1402. Second reinforcement structure. Detailed Implementation
[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings. Example
[0027] See appendix Figures 1-9 This utility model discloses a device for recovering heat energy from waste gas, comprising a hollow shell 1. The shell 1 includes a first side and a second side arranged opposite to each other. A first inlet 2 and a first outlet 4 are respectively arranged opposite to each other on the first and second sides. A second inlet 5 and a second outlet 3 are also respectively arranged opposite to each other on the first and second sides. Several first partition plates 13 with multiple faceted structures are vertically arranged inside the inner cavity of the shell 1. The several first partition plates 13 form a first channel 8 and a second channel 9 arranged at intervals. The ports at both ends of the first channel 8 communicate with the first inlet 2 and the first outlet 4, respectively. The ports at both ends of the second channel 9 communicate with the second inlet 5 and the second outlet 3, respectively. Several top cleaning ports are provided at the top of the first channel 8, and several bottom cleaning ports are provided at the bottom of the first channel 8. Several drain ports 101 are provided at the bottom of the shell 1, and the bottom cleaning ports communicate with the drain ports 101. The first side and the second side are preferably two sides arranged along the length of the shell 1. The first inlet 2 and the first outlet 4 are used for the intake of high-temperature exhaust gas and the exhaust of low-temperature exhaust gas, respectively. The second inlet 5 and the second outlet 3 are used for the intake of low-temperature heat exchange gas and the exhaust of high-temperature heat exchange gas, respectively. The increased surface area structure not only increases the area of the first partition plate 13, thereby increasing the heat exchange area, but also enables the exhaust gas or heat exchange gas to form turbulence during the flow process, thereby increasing the heat exchange efficiency.
[0028] Optionally, a first sealing plate 7 is provided at both ends of the first channel 8, and a second sealing plate 10 is provided at both ends of the second channel 9. The first sealing plate 7 is used to seal both ends of the first channel 8 to prevent the first channel 8 from communicating with the second inlet 5 or the second outlet 3; the second sealing plate 10 is used to seal both ends of the second channel 9 to prevent the second channel 9 from communicating with the first inlet 2 or the first outlet 4, and to prevent the exhaust gas and heat exchange gas from flowing into each other.
[0029] Optionally, a plurality of channel isolation plates 12 are provided inside the housing 1 to isolate the ports at both ends of the first channel 8 and the ports at both ends of the second channel 9. The two ends of the channel isolation plates 12 abut against the inner wall of the housing 1 and the isolation plate, respectively, and the channel isolation plates 12 are disposed between the ports of the first channel 8 and the ports of the second channel 9.
[0030] Optionally, the cross-section of the augmented surface structure of the first partition plate 13 is arc-shaped, and several arc-shaped augmented surface structures are located on the same side of the first partition plate 13.
[0031] Optionally, the top of the inner cavity of the housing 1 is provided with a plurality of top cleaning pipes 6 for spraying cleaning medium to clean the first channel 8, and the cleaning end of the top cleaning pipe 6 corresponds to the top cleaning port. In other embodiments, the top cleaning device may also be a spray head arranged at intervals.
[0032] Optionally, the bottom of the inner cavity of the housing 1 is provided with a plurality of bottom cleaning pipes 11 for spraying cleaning medium to clean the first channel 8, and the cleaning end of the bottom cleaning pipe 11 corresponds to the bottom cleaning port. In other embodiments, the bottom cleaning device may also be a spray head arranged at intervals.
[0033] Optionally, a first inlet 2 and a second outlet 3 are provided on the first side, and a first outlet 4 and a second inlet 5 are provided on the second side. This design makes the flow direction of the exhaust gas and the heat exchange gas opposite, increasing the heat exchange efficiency. In other cases, the first inlet 2 and the second inlet 5 can be on the same side, and the first outlet 4 and the second outlet 3 can be on the same side, but this unidirectional flow arrangement does not provide optimal heat exchange efficiency.
[0034] Optionally, the first inlet 2 is arranged above the second outlet 3, and the first outlet 4 is arranged above the second inlet 5.
[0035] Optionally, the width of the first channel 8 is greater than the width of the second channel 9. Example
[0036] See appendix Figure 10 And refer to the appendix Figures 1-9The only difference between the second embodiment and the first embodiment is the shape of the partition plate. The cross-section of the augmenting structure provided on the second partition plate 14 is right-angled, including a plurality of first augmenting structures 1401 and a plurality of second augmenting structures 1402. The right-angled first augmenting structures 1401 and second augmenting structures 1402 are located on both sides of the second partition plate 14. The first augmenting structures 1401 and second augmenting structures 1402 are in opposite directions and are arranged at intervals along the length of the second partition plate 14.
Claims
1. A device for recovering heat energy from waste gas, characterized in that: The shell (1) includes a hollow shell, which includes a first side and a second side arranged opposite to each other. The first side and the second side are respectively provided with a first inlet (2) and a first outlet (4). The first side and the second side are respectively provided with a second inlet (5) and a second outlet (3). Several partition plates with several multi-faceted structures are vertically arranged in the inner cavity of the shell (1). The several partition plates form a first channel (8) and a second channel (9) arranged at intervals. The ports at both ends of the first channel (8) are respectively connected to the first inlet (2) and the first outlet (4). The ports at both ends of the second channel (9) are respectively connected to the second inlet (5) and the second outlet (3). Several top cleaning ports are provided at the top of the first channel (8). Several bottom cleaning ports are provided at the bottom of the first channel (8). Several drain ports (101) are provided at the bottom of the shell (1). The bottom cleaning ports are connected to the drain ports (101).
2. The device for recovering heat energy from waste gas according to claim 1, characterized in that: The first channel (8) is provided with a first sealing plate (7) at both ends, and the second channel (9) is provided with a second sealing plate (10) at both ends.
3. The device for recovering heat energy from waste gas according to claim 1 or 2, characterized in that: The housing (1) is provided with several channel isolation plates (12). The two ends of the channel isolation plates (12) are respectively in contact with the inner wall of the housing (1) and the isolation plate. The channel isolation plates (12) are located between the port of the first channel (8) and the port of the second channel (9).
4. The device for recovering heat energy from waste gas according to claim 1, characterized in that: The cross-section of the augmented structure is either arc-shaped or right-angled.
5. The device for recovering heat energy from waste gas according to claim 1, characterized in that: The top of the inner cavity of the housing (1) is provided with several top cleaning devices for spraying out cleaning medium for cleaning the first channel (8), and the cleaning end of the top cleaning device corresponds to the top cleaning port.
6. The device for recovering heat energy from waste gas according to claim 1, characterized in that: The bottom of the inner cavity of the housing (1) is provided with several bottom cleaning devices for spraying out cleaning medium for cleaning the first channel (8), and the cleaning end of the bottom cleaning device corresponds to the bottom cleaning port.
7. The device for recovering heat energy from waste gas according to claim 1, characterized in that: A first inlet (2) and a second outlet (3) are provided on the first side, and a first outlet (4) and a second inlet (5) are provided on the second side.
8. The device for recovering heat energy from waste gas according to claim 7, characterized in that: The first inlet (2) is arranged above the second outlet (3), and the first outlet (4) is arranged above the second inlet (5).
9. The device for recovering heat energy from waste gas according to claim 1, characterized in that: The width of the first channel (8) is greater than the width of the second channel (9).