Heat pipe economizer

Abstract

The utility model relates to the technical field of coal economizers, in particular to a heat pipe coal economizer which comprises a heat pipe body and connectors installed at the two ends of the heat pipe body, the heat pipe body is in a U shape, two heat absorption assemblies are arranged outside the heat pipe body, and each heat absorption assembly comprises a plurality of heat transfer plates. The heat absorption assembly is used for absorbing heat in smoke and conducting the heat into liquid in the heat pipe body, supporting plates are fixedly connected to the two sides of the outer wall of the heat pipe body, and a variable-pitch assembly is arranged on one side between the two supporting plates and used for adjusting the distance between the multiple heat transfer plates. The heat absorption assembly comprises a plurality of first heat absorption rods fixedly connected with the upper end face of the heat transfer plate. Compared with the prior art, the practical requirement that in the prior art, due to the fact that a heat absorption structure in a heat pipe economizer cannot achieve distance adjustment, flexible adjustment is difficult to conduct according to practical application scenes is met.

Description

Technical Field

[0001] The utility model relates to the technical field of economizers, in particular to a heat pipe economizer. Background Art

[0002] A heat pipe economizer is a highly efficient heat exchange device that primarily utilizes waste heat from flue gases from equipment such as boilers and heating furnaces. Using heat pipe technology, the heat is transferred to circulating water, raising the water temperature and thereby improving boiler efficiency and saving energy. The operating principle of a heat pipe economizer is based on the efficient heat transfer properties of heat pipes. The heat pipe is filled with a working fluid. When the high-temperature flue gas flows through the evaporation section of the heat pipe, the working fluid absorbs heat and vaporizes. The vapor then flows to the condensation section, where it releases heat and condenses back into a liquid state, completing the thermal cycle. This process continues until a dynamic equilibrium is reached. The heat pipe economizer physically isolates the flue gas from the circulating water, avoiding the corrosion and leakage issues that can occur with traditional heat exchangers.

[0003] In the prior art, a Chinese patent document with publication number CN217978770U proposes a heat pipe economizer, comprising a mounting block, a plurality of fixing clamps are installed on both sides of the inner wall of the mounting block, and a heat pipe is arranged inside the mounting block, a water inlet pipe is arranged above one side of the mounting block, and a water outlet is arranged below the other side of the mounting block. Although dust filters are provided at both ends of the interior of the mounting block, the high-temperature flue gas in the flue can enter the interior of the mounting block for filtration, thereby avoiding the invasion of smoke and dust, and due to the shape of the dust filter, the high-temperature flue gas can be effectively filtered regardless of whether it enters from the top or bottom of the mounting block, and the smoke is filtered. The filtered impurities are gathered on both sides of the dust filter under the action of airflow, rather than being distributed on the surface of the dust filter, which has a greater impact on the filtering quality of the dust filter. In this way, the device can have a better smoke and dust protection function. However, when using this technology, the heat pipe is not provided with a structure to improve the heat absorption efficiency, resulting in a slow temperature rise of the liquid inside the heat pipe. Although heat-absorbing fins can be added to the outside of the heat pipe to increase the temperature rise rate of the liquid inside the heat pipe, the distance between the heat-absorbing fins in the existing technology cannot be adjusted, resulting in the inability to flexibly adjust according to actual application scenarios (such as flue gas temperature, flow rate, coal quality changes, etc.) to optimize the heat exchange area and flue gas flow rate.

[0004] Furthermore, we disclose a heat pipe economizer to meet the actual demand that the heat absorption structure in the heat pipe economizer in the prior art cannot achieve distance adjustment, making it difficult to flexibly adjust according to actual application scenarios. Utility Model Content

[0005] In view of this, the purpose of the present invention is to propose a heat pipe economizer to solve the problem in the prior art that the heat absorption structure in the heat pipe economizer cannot achieve distance adjustment, making it difficult to flexibly adjust according to actual application scenarios.

[0006] Based on the above purpose, the utility model provides a heat pipe economizer, including a heat pipe body and interfaces installed at both ends of the heat pipe body, the heat pipe body is U-shaped, and two groups of heat absorption components are arranged on the outside of the heat pipe body, the heat absorption components include multiple heat transfer plates, the heat absorption components are used to absorb heat in the flue gas and conduct it to the liquid inside the heat pipe body, support plates are fixedly connected on both sides of the outer wall of the heat pipe body, and a variable distance component is arranged on one side between the two support plates, and the variable distance component is used to adjust the distance between the multiple heat transfer plates.

[0007] Preferably, the heat absorption assembly includes a plurality of first heat absorption rods fixedly connected to the upper end surface of the heat transfer plate, and a plurality of second heat absorption rods fixedly connected to the lower end surface of the heat transfer plate at even intervals, and the tail ends of the first heat absorption rods and the second heat absorption rods are both C-shaped and the C-shaped openings are both facing the side close to the heat transfer plate.

[0008] Preferably, guide holes are provided at the upper and lower ends of the middle portion of the heat transfer plate, and the heat transfer plate is slidably connected to the heat pipe body through the two guide holes.

[0009] Preferably, a plurality of heat absorbing sheets are fixedly connected to both ends of the heat transfer plate, and the heat absorbing sheets are arranged obliquely on the heat transfer plate, and the heat absorbing sheets are wavy.

[0010] Preferably, the pitch-changing assembly includes a rotating rod arranged between two support plates, one end of the rotating rod passes through the support plate and is fixedly connected to a screw sleeve, and the end of the rotating rod away from the screw sleeve is engaged and rotatably connected to the support plate on the other side.

[0011] Preferably, two groups of guide grooves are provided on both sides of the middle portion of the outer wall of the rotating rod, the number of the guide grooves in each group is the same as the number of the heat transfer plates in each group, the rotation directions on both sides of each group of guide grooves are opposite, and the pitch of the outer side of each group of guide grooves is greater than the pitch of the inner side guide grooves.

[0012] Preferably, a transmission rod is fixedly connected to the middle of one end surface of the heat transfer plate close to the rotating rod, one end of the transmission rod is rounded, and the end of the transmission rod with the rounded corner is slidably connected to the inside of the guide groove.

[0013] Beneficial effects of the utility model:

[0014] This heat pipe economizer features two external heat-absorbing assemblies, comprised of multiple heat transfer plates, heat-absorbing rods, and heat-absorbing fins. These assemblies are designed to directly and efficiently absorb heat from the flue gas flowing through them. This significantly increases the contact area with the high-temperature flue gas, accelerating the heat transfer rate. Once the flue gas heat is effectively captured and transferred to the heat-absorbing rods and fins, this heat is rapidly transferred to the liquid within the heat pipe body through heat conduction via the heat transfer plates, rapidly raising the liquid's temperature. This design significantly enhances the heat-absorbing capacity of the heat pipe economizer and improves energy efficiency.

[0015] The heat pipe economizer is equipped with a variable distance component for real-time adjustment of the distance between multiple heat transfer plates. By adjusting the spacing between the heat transfer plates, it can flexibly respond to changes in parameters such as flue gas temperature, flow rate and coal quality under different operating conditions, thereby achieving the optimal configuration of heat exchange area and flue gas flow rate. When it is necessary to improve the heat exchange efficiency, the spacing between the heat transfer plates can be reduced to increase the heat exchange area. When it is necessary to reduce the pressure drop or avoid local overheating, the spacing can be increased to optimize the fluid flow characteristics. This dynamic adjustment capability greatly improves the adaptability and flexibility of the heat pipe economizer, enabling it to maintain efficient and stable operation under various complex and changeable operating conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from a top view;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the heat absorption component of the utility model;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the utility model when viewed from above;

[0021] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0022] The following are marked in the figure:

[0023] 1. Interface; 2. Support plate; 3. Heat pipe body; 4. First heat absorbing rod; 5. Heat transfer plate; 6. Heat absorbing sheet; 7. Second heat absorbing rod; 8. Guide hole; 9. Transmission rod; 10. Fillet; 11. Rotating rod; 12. Screw sleeve; 13. Guide groove. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0025] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0026] like Figures 1 to 5 As shown, a heat pipe economizer includes a heat pipe body 3 and interfaces 1 installed at both ends of the heat pipe body 3. The heat pipe body 3 is U-shaped. Two sets of heat absorbing components are installed on the outside of the heat pipe body 3. The heat absorbing components include multiple heat transfer plates 5. The heat absorbing components are used to absorb heat from the flue gas and transfer it to the liquid inside the heat pipe body 3. Support plates 2 are fixedly connected to both sides of the outer wall of the heat pipe body 3. A variable distance component is installed on one side between the two support plates 2. The variable distance component is used to adjust the distance between the multiple heat transfer plates 5.

[0027] This heat pipe economizer utilizes two high-efficiency heat absorption components, consisting of multiple heat transfer plates 5, heat absorption rods, and heat absorption fins 6, installed on its exterior. This significantly increases the contact area with the high-temperature flue gas, accelerating heat transfer and rapidly raising the temperature of the liquid inside the heat pipe, significantly improving heat absorption capacity and energy efficiency. Furthermore, the variable-pitch assembly allows for real-time adjustment of the spacing between the heat transfer plates 5, flexibly adapting to varying operating conditions. Whether improving heat exchange efficiency or optimizing fluid flow characteristics, optimal configuration is achieved, ensuring the heat pipe economizer maintains efficient and stable operation in complex and changing environments.

[0028] Further, such as Figure 2 、 Figure 3As shown, the heat absorption assembly includes a plurality of first heat absorption rods 4 fixedly connected to the upper end surface of the heat transfer plate 5, and a plurality of second heat absorption rods 7 fixedly connected to the lower end surface of the heat transfer plate 5 at even intervals. The tail ends of the first heat absorption rods 4 and the second heat absorption rods 7 are both C-shaped, and the C-shaped openings are both facing the side close to the heat transfer plate 5. Guide holes 8 are opened at the upper and lower ends of the middle part of the heat transfer plate 5. The heat transfer plate 5 is slidably connected to the heat pipe body 3 through the two guide holes 8. A plurality of heat absorption sheets 6 are fixedly connected to both ends of the heat transfer plate 5. The heat absorption sheets 6 are arranged obliquely on the heat transfer plate 5 and are wavy.

[0029] When the economizer is in use, the first heat absorbing rod 4 is on the top and the second heat absorbing rod 7 is on the bottom. The flue gas flows downward and moves from the top. The first heat absorbing rod 4 and the second heat absorbing rod 7 are directly fixed to the upper and lower end surfaces of the heat transfer plate 5. These heat absorbing rods are arranged in a C-shaped opening facing the heat transfer plate 5, which effectively increases the contact area with the high-temperature flue gas, thereby accelerating the capture of heat. At the same time, the guide hole 8 opened in the middle of the heat transfer plate 5 enables it to be slidably connected with the heat pipe body 3, ensuring that the heat can be smoothly transferred to the liquid inside the heat pipe through the heat transfer plate 5. In addition, the wavy heat-absorbing sheets 6 fixedly connected at both ends of the heat transfer plate 5 have a length that gradually shortens from top to bottom and is wavy, which not only further increases the contact area with the flue gas, but also promotes the disturbance of the flue gas through its unique shape, thereby improving the heat exchange efficiency. When the high-temperature flue gas flows through, the heat is first efficiently absorbed by the heat-absorbing rods and the heat-absorbing sheets 6, and then quickly transferred to the inside of the heat pipe through the heat transfer plate 5, so that the liquid temperature rises rapidly. This working principle significantly enhances the heat absorption capacity of the heat pipe economizer and improves the overall energy utilization efficiency.

[0030] Further, such as Figure 1 、 Figure 4 、 Figure 5 As shown, the pitch-changing assembly includes a rotating rod 11 arranged between the two support plates 2. One end of the rotating rod 11 passes through the support plate 2 and is fixedly connected to a screw sleeve 12. The end of the rotating rod 11 away from the screw sleeve 12 is engaged and rotatably connected with the support plate 2 on the other side. Two groups of guide grooves 13 are opened on both sides of the middle part of the outer wall of the rotating rod 11. The number of each group of guide grooves 13 is the same as the number of each group of heat transfer plates 5. The rotation directions of the two sides of each group of guide grooves 13 are opposite. The pitch of the outer side of each group of guide grooves 13 is greater than the pitch of the inner side of the guide groove 13. A transmission rod 9 is fixedly connected to the middle of the end surface of the heat transfer plate 5 close to the rotating rod 11. One end of the transmission rod 9 is opened with a rounded corner 10, and the end of the transmission rod 9 with the rounded corner 10 is slidably connected to the inside of the guide groove 13.

[0031] The assembly is mainly composed of a rotating rod 11, a screw sleeve 12, a guide groove 13 and a transmission rod 9. The rotating rod 11 is arranged between the two support plates 2, one end of the rotating rod 11 passes through the support plate 2 and is fixedly connected to the screw sleeve 12, and the other end is engaged and rotated with the support plate 2 on the other side, thereby allowing the rotating rod 11 to rotate freely between the support plates 2. A plurality of groups of guide grooves 13 are provided on both sides of the middle of the outer wall of the rotating rod 11. The number of guide grooves 13 in each group matches the number of heat transfer plates 5, and the guide grooves 13 in each group are divided into two sides with opposite rotation directions. The pitch of the guide grooves 13 on the outer side of the same side is greater than that on the inner side. This design cleverly realizes the flexibility of distance adjustment. When the spacing between the heat transfer plates 5 needs to be adjusted, when it is necessary to increase When the heat exchange efficiency is improved, the rotating sleeve 12 drives the rotating rod 11 to rotate. Due to the special spiral design of the guide groove 13, the end of the transmission rod 9 with the rounded corner 10 will slide along the guide groove 13. Since the guide grooves 13 on both sides rotate in opposite directions and the pitches of the adjacent guide grooves 13 on the same side are different, the transmission rod 9 will drive the heat transfer plates 5 to move during the sliding process, thereby adjusting the spacing. When it is necessary to reduce the pressure drop or avoid local overheating, the rotation angle is increased to make the transmission rod 9 slide outward along the guide groove 13, increasing the spacing to optimize the fluid flow characteristics. This dynamic adjustment method ensures that the heat pipe economizer can adjust the spacing of the heat transfer plates 5 in real time according to different working conditions to achieve the best heat exchange effect.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0033] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A heat pipe economizer, characterized in that: The invention comprises a heat pipe body (3) and interfaces (1) installed at both ends of the heat pipe body (3); the heat pipe body (3) is U-shaped; two groups of heat absorbing components are arranged outside the heat pipe body (3); the heat absorbing components include multiple heat transfer plates (5); the heat absorbing components are used to absorb heat in the flue gas and transfer it to the liquid inside the heat pipe body (3); both sides of the outer wall of the heat pipe body (3) are fixedly connected to support plates (2); a variable distance component is arranged on one side between the two support plates (2); the variable distance component is used to adjust the distance between the multiple heat transfer plates (5).

2. The heat pipe economizer according to claim 1, characterized in that: The heat absorption assembly comprises a plurality of first heat absorption rods (4) fixedly connected to the upper end surface of the heat transfer plate (5), and a plurality of second heat absorption rods (7) fixedly connected to the lower end surface of the heat transfer plate (5) at even intervals, and the tail ends of the first heat absorption rods (4) and the second heat absorption rods (7) are both C-shaped, and the C-shaped openings are both oriented toward a side close to the heat transfer plate (5).

3. The heat pipe economizer according to claim 2, characterized in that: The middle and upper ends of the heat transfer plate (5) are both provided with guide holes (8), and the heat transfer plate (5) is slidably connected to the heat pipe body (3) through the two guide holes (8).

4. The heat pipe economizer according to claim 3, characterized in that: A plurality of heat absorbing sheets (6) are fixedly connected to both ends of the heat transfer plate (5); the heat absorbing sheets (6) are arranged obliquely on the heat transfer plate (5); and the heat absorbing sheets (6) are wavy.

5. The heat pipe economizer according to claim 4, characterized in that: The pitch-changing assembly comprises a rotating rod (11) arranged between two support plates (2), one end of the rotating rod (11) passes through the support plate (2) and is fixedly connected to a screw sleeve (12), and one end of the rotating rod (11) away from the screw sleeve (12) is engaged and rotatably connected to the support plate (2) on the other side.

6. The heat pipe economizer according to claim 5, characterized in that: Two groups of guide grooves (13) are provided on both sides of the middle portion of the outer wall of the rotating rod (11). The number of the guide grooves (13) in each group is the same as the number of the heat transfer plates (5). The rotation directions of the two sides of each group of guide grooves (13) are opposite. The pitch of the outer side of each group of guide grooves (13) is greater than the pitch of the inner side of the guide grooves (13).

7. The heat pipe economizer according to claim 6, characterized in that: A transmission rod (9) is fixedly connected to the middle of the end surface of one side of the heat transfer plate (5) close to the rotating rod (11), and one end of the transmission rod (9) is provided with a rounded corner (10). The end of the transmission rod (9) provided with the rounded corner (10) is slidably connected to the inside of the guide groove (13).

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