A pressure-bearing heat exchange device capable of preventing leakage and plugging
By designing a pressure heat exchange device to prevent leakage and blockage, and using a water tank sealing end plate, flue plate and steel plate for double isolation, the problems of easy failure of heat pipes and water-side leakage and ash accumulation blockage are solved, thereby improving heat exchange efficiency and the safety and stability of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUANENG JINING YUNHE POWER GENERATION CO LTD
- Filing Date
- 2022-11-30
- Publication Date
- 2026-06-12
AI Technical Summary
Heat pipes are prone to failure during manufacturing, have a short service life, and poor isolation and sealing performance during air-to-water heat exchange, leading to water-side leakage into the flue and blockage by ash accumulation.
A pressure heat exchange device designed to prevent leakage and blockage includes a heat exchange tube body, a water tank, and a leakage and blockage prevention mechanism. It is equipped with a water tank sealing end plate, a flue plate, and a steel plate for double isolation, and uses sealing rings and sealing welding. Combined with a drain pipe to discharge leaked water, it enhances the sealing performance and heat insulation performance.
It improves heat exchange efficiency, extends the service life of heat pipes, prevents water leakage into the flue and ash accumulation and blockage, and enhances the safety, stability and sealing performance of the device.
Smart Images
Figure CN116164566B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of heat exchanger technology, and in particular to a pressure heat exchanger that is leak-proof and prevents blockage. Background Technology
[0002] Heat pipes have undergone decades of development since their invention and are now applied in various aspects of industrial and mining enterprises. Their application is primarily in the aerospace and microelectronics industries; however, due to various reasons, their use in the thermal power sector is still in its early stages. A typical heat pipe device consists of heat exchange tubes and a heat exchange tank. It includes a tube bundle composed of multiple heat exchange tubes inserted into upper and lower tube sheets at both ends. Air flows through the heat exchange tubes, and flue gas flows between the tubes. An air inlet / outlet manifold is connected to the top of the tube bundle, allowing air to flow sequentially through the heat exchange tubes of the bundle.
[0003] In practical applications, industrial heat pipes still face numerous problems that urgently need to be addressed. Firstly, manufacturing issues lead to frequent failures and short lifespans. Typically, after two to three years of operation, non-condensable gases accumulate at the cold end of the heat pipe, causing heat exchange performance failure. Failed heat pipes cannot be repaired on-site and must be returned to the factory for further processing. Secondly, the gas-water heat exchanger's isolation and sealing are problematic, easily leading to water-side leakage into the flue and subsequent ash accumulation and blockage. Summary of the Invention
[0004] The purpose of this invention is to provide a pressure heat exchange device that prevents leakage and blockage, and to solve the problems of easy failure of heat pipes, short service life, poor isolation and sealing performance, and water leakage into the flue causing ash accumulation and blockage.
[0005] To achieve the above objectives, the present invention provides a leak-proof and blockage-proof pressure heat exchange device, comprising:
[0006] The heat exchange tube body is provided with a support plate, a dummy tube is provided at one end of the heat exchange tube body, and supporting square steel is provided around the heat exchange tube body.
[0007] A ventilation valve is installed at the end of the heat exchange tube body where a dummy tube is provided;
[0008] A water tank is disposed at the other end of the heat exchange tube body;
[0009] A leak-proof and blockage-proof mechanism is provided between the heat exchange tube body and the water tank, and the leak-proof and blockage-proof mechanism is used to isolate the flue gas from the water tank.
[0010] This device exchanges heat through the heat exchange tube body and the water tank, and is equipped with a leak-proof and blockage-proof mechanism to prevent water leakage into the flue and causing ash accumulation and blockage.
[0011] In some embodiments of this application, the anti-leakage and plugging mechanism is improved so that the anti-leakage and plugging mechanism can provide double isolation between the water tank and the flue, effectively preventing water leakage into the flue and causing ash accumulation and blockage. The anti-leakage and plugging mechanism includes a water tank sealing end plate, a flue plate and a steel plate.
[0012] The water tank sealing end plate is disposed on both sides of the water tank, the flue plate is disposed on one side of the heat exchange tube body, and the steel plate is used to connect the water tank sealing end plate and the flue plate. The water tank sealing end plate on one side of the water tank forms a sealed space with the flue plate and the steel plate.
[0013] In some embodiments of this application, the installation method of the heat exchange tube body and the water tank sealing end plate is improved to make the heat exchange efficiency of the device higher. The heat exchange tube body passes through the water tank sealing end plate on the flue gas side, and the end of the heat exchange tube body is located inside the water tank. The tube penetration position of the water tank and the water tank sealing end plate on the flue gas side is sealed by welding.
[0014] In some embodiments of this application, the configuration of the flue plate is improved to enhance its sealing performance. A sealing ring is provided on the flue plate to seal the gap between the flue plate and the heat exchange tube body at the tube penetration position.
[0015] In some embodiments of this application, the structure of the anti-leakage blocking mechanism is improved so that the anti-leakage blocking mechanism can perform sealing and heat insulation performance. The water tank sealing end plate and flue plate of the anti-leakage blocking mechanism are provided with a sealing castable layer, which is used for sealing and heat insulation.
[0016] In some embodiments of this application, the leak-proof plugging mechanism is improved to facilitate the drainage of water stored inside the leak-proof plugging mechanism. A drain pipe is installed at the bottom of the leak-proof plugging mechanism, and a drain valve is provided on the drain pipe. The drain pipe is used to drain water leaked from inside the leak-proof plugging mechanism.
[0017] In some embodiments of this application, the internal layout of the water tank is improved to enhance the pressure-bearing capacity of the water tank sealing end plates on both sides of the water tank. Several round steel braces are provided inside the water tank to enhance the pressure-bearing capacity of the water tank sealing end plates on both sides of the water tank.
[0018] In some embodiments of this application, the connecting parts of the water tank are improved to facilitate the entry of circulating water into the water tank for heat exchange. A water tank inlet is provided on the lower side of the water tank, and the water tank inlet is connected to the circulating water inlet pipe.
[0019] In some embodiments of this application, the connecting components of the water tank are improved to facilitate the discharge of circulating water from the water tank. A water tank outlet is provided on the upper side of the water tank, and the water tank outlet is connected to the circulating water outlet pipe.
[0020] This application discloses a pressure heat exchange device for preventing leakage and blockage, including a heat exchange tube body, a support plate on the heat exchange tube body, a dummy tube at one end of the heat exchange tube body, and supporting square steel around the heat exchange tube body; a vent valve installed at the end of the heat exchange tube body with the dummy tube; a water tank located at the other end of the heat exchange tube body; and a leakage and blockage prevention mechanism located between the heat exchange tube body and the water tank, the mechanism being used to isolate flue gas from the water tank.
[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0022] 1. By setting up a water tank to withstand the circulating water pressure, and at the same time, the flue gas flows horizontally from top to bottom to wash the heat exchange tube body, while the circulating water on the side of the water tank flows from bottom to top, the two form a counter-flow, which further improves the heat exchange efficiency of the heat exchange device.
[0023] 2. Regenerative heat pipes are used. When the heat exchanger tube body fails due to the generation of non-condensable gases, the heat exchanger tube body can be regenerated through the vent valve at the bottom end of the heat exchanger tube body. All the medium inside the tube is extracted, and then the vacuum is evacuated and the medium is refilled, thus extending the service life of the heat exchanger tube body.
[0024] 3. The anti-leakage and anti-blockage mechanism is set up to doubly isolate the flue gas and circulating water. The heat exchange on the flue gas side and the heat exchange on the water tank side are circulated separately. The anti-leakage and anti-blockage mechanism can ensure that the circulating water in the water tank will not flow into the flue, fundamentally eliminating the phenomenon of circulating water flowing into the flue and causing ash accumulation and blockage, thus improving the safety and stability of the heat exchange device.
[0025] 4. In the anti-leakage and anti-blockage mechanism, the heat exchange tube body through the flue is sealed with a rubber ring, and the heat exchange tube body through the water tank sealing plate is sealed by welding. At the same time, the inside of the anti-leakage and anti-blockage mechanism can be filled with castable material for curing. On the one hand, this improves the sealing performance of the rubber ring at the point where the heat exchange tube body passes through the flue, and on the other hand, it reduces the heat dissipation of the heat exchange tube body.
[0026] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the structure of a pressure heat exchange device for preventing leakage and blockage according to the present invention.
[0028] Figure Labels
[0029] 1. Heat exchanger tube body; 11. Support plate; 12. Dummy tube; 2. Ventilation valve; 3. Water tank; 31. Round steel tie rod; 32. Water tank inlet; 33. Water tank outlet; 4. Leakage prevention and blockage mechanism; 41. Water tank sealing end plate; 42. Flue plate; 43. Steel plate; 44. Sealing ring; 5. Drain pipe; 6. Drain valve; Detailed Implementation
[0030] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.
[0031] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the ordinary meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.
[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof, without excluding other elements or objects. The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "side," and "bottom," indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are merely relational terms determined for the convenience of describing the structural relationships of the various components or elements of the present invention, and do not specifically refer to any component or element in the invention, nor should they be construed as limiting the invention. Terms such as "fixed," "connected," and "joined," etc., should be interpreted broadly, indicating that it can be a fixed connection, an integral connection, or a detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. For researchers or technicians in the field, the specific meaning of the above terms in this invention can be determined according to the specific circumstances, and they should not be construed as limitations on this invention.
[0033] Example
[0034] Heat pipes have undergone decades of development since their invention and are now applied in various aspects of industrial and mining enterprises. Their application is primarily in the aerospace and microelectronics industries; however, due to various reasons, their use in the thermal power sector is still in its early stages. A typical heat pipe device consists of heat exchange tubes and a heat exchange tank. It includes a tube bundle composed of multiple heat exchange tubes inserted into upper and lower tube sheets at both ends. Air flows through the heat exchange tubes, and flue gas flows between the tubes. An air inlet / outlet manifold is connected to the top of the tube bundle, allowing air to flow sequentially through the heat exchange tubes of the bundle.
[0035] In practical applications, industrial heat pipes still face numerous problems that urgently need to be addressed. Firstly, manufacturing issues lead to frequent failures and short lifespans. Typically, after two to three years of operation, non-condensable gases accumulate at the cold end of the heat pipe, causing heat exchange performance failure. Failed heat pipes cannot be repaired on-site and must be returned to the factory for further processing. Secondly, the gas-water heat exchanger's isolation and sealing are problematic, easily leading to water-side leakage into the flue and subsequent ash accumulation and blockage.
[0036] To address the above problems, this invention provides a pressure heat exchange device that prevents leakage and blockage, such as... Figure 1 As shown, it includes:
[0037] The heat exchange tube body 1 is provided with a support plate 11, a dummy tube 12 is provided at one end of the heat exchange tube body 1, and a support square steel is provided around the heat exchange tube body.
[0038] Ventilation valve 2, wherein the ventilation valve 2 is installed at one end of the heat exchange tube body 1 where the dummy tube 12 is provided;
[0039] Water tank 3, which is located at the other end of the heat exchange tube body 1;
[0040] Leakage prevention and blockage mechanism 4 is disposed between the heat exchange tube body 1 and the water tank 3, and is used to isolate the flue gas from the water tank.
[0041] In some embodiments of this application, the ventilation valve 2 is located on the lower side of one end of the heat exchange tube body 1. When the heat exchange tube body 1 fails, the device is isolated, and then the failed heat exchange tube body 1 is located by an infrared thermometer. After it is located, the failed heat exchange tube body 1 is regenerated by the ventilation valve 2.
[0042] In some embodiments of this application, the heat exchange device is placed at an angle, and the air exchange valve is located on the lowest side of the end of the heat exchange tube body 1, which can completely restore the failed heat exchange tube body 1 and improve the overall safety and stability of the heat exchange device.
[0043] In some embodiments of this application, the heat exchange tube body is filled with distilled water and a passivating agent.
[0044] In this embodiment, by setting the water tank 3 to bear the circulating water pressure, and at the same time, the flue gas horizontally washes the heat exchange tube body 1 from top to bottom, while the circulating water on the side of the water tank 3 flows from bottom to top, the two form a counter-flow, which further improves the heat exchange efficiency of the heat exchange device.
[0045] In this embodiment, a regenerable heat pipe is used. When the heat exchange tube body 1 fails due to the generation of non-condensable gas, the heat exchange tube body 1 can be regenerated through the vent valve 2 at the bottom end of the heat exchange tube body 1. All the medium inside the tube is extracted, and then the vacuum is evacuated and the medium is refilled, thereby extending the service life of the heat exchange tube body 1.
[0046] In some embodiments of this application, the anti-leakage and blockage mechanism 4 is improved so that the anti-leakage and blockage mechanism 4 can provide double isolation between the water tank and the flue, effectively preventing water leakage into the flue and causing ash blockage. The anti-leakage and blockage mechanism 4 includes a water tank sealing end plate 41, a flue plate 42 and a steel plate 43.
[0047] The water tank sealing end plate 41 is disposed on both sides of the water tank 3, the flue plate 42 is disposed on one side of the heat exchange tube body 1, and the steel plate 43 is used to connect the water tank sealing end plate 41 and the flue plate 42. The water tank sealing end plate 41 on one side of the water tank 3 forms a sealed space with the flue plate 42 and the steel plate 43.
[0048] In this embodiment, a leak-proof and blockage-proof mechanism 4 is provided to doubly isolate the flue gas and circulating water. The heat exchange on the flue gas side and the heat exchange on the water tank side are circulated separately. The leak-proof and blockage-proof mechanism 4 can ensure that the circulating water in the water tank will not flow into the flue, fundamentally eliminating the phenomenon of circulating water flowing into the flue and causing ash accumulation and blockage, thereby improving the safety and stability of the heat exchange device.
[0049] In some embodiments of this application, the installation method of the heat exchange tube body 1 and the water tank sealing end plate 41 is improved to make the heat exchange efficiency of the device higher. The heat exchange tube body 1 passes through the water tank sealing end plate 41 on the flue gas side, and the end of the heat exchange tube body 1 is located inside the water tank 3. The tube penetration position of the water tank 3 and the water tank sealing end plate 41 on the flue gas side is sealed by welding.
[0050] In some embodiments of this application, the heat exchange tube body 1 passes through the water tank sealing end plate 41, with one side inside the flue and the other side inside the water tank, and is sealed by the anti-leakage blocking mechanism 4, with heat exchange occurring on both sides respectively.
[0051] In some embodiments of this application, the configuration of the flue plate 42 is improved to make the sealing performance of the flue plate 42 more perfect. A sealing ring 44 is provided on the flue plate 42, which is used to seal the gap between the flue plate 42 and the heat exchange tube body 1 at the tube penetration position.
[0052] In some embodiments of this application, the structure of the anti-leakage blocking mechanism 4 is improved so that the anti-leakage blocking mechanism 4 can perform sealing and heat insulation performance. The water tank sealing end plate 41 and flue plate 42 of the anti-leakage blocking mechanism 4 are provided with a sealing castable layer, which is used for sealing and heat insulation.
[0053] In this embodiment, the heat exchange tube body 1 through the flue is sealed with a rubber ring 44 in the anti-leakage and blockage mechanism 4, and the heat exchange tube body 1 through the water tank sealing end plate 41 is sealed by welding. At the same time, the inside of the anti-leakage and blockage mechanism 4 can be filled with casting material for curing. On the one hand, this improves the sealing performance of the rubber ring 44 at the point where the heat exchange tube body 1 passes through the flue, and on the other hand, it reduces the heat dissipation of the heat exchange tube body 1.
[0054] In some embodiments of this application, the connection structure of the anti-leakage blocking mechanism 4 is improved so that the water stored inside the anti-leakage blocking mechanism 4 can be easily discharged. A drain pipe 5 is installed at the bottom of the anti-leakage blocking mechanism 4, and a drain valve 6 is provided on the drain pipe 5. The drain pipe 5 is used to discharge the water leaked inside the anti-leakage blocking mechanism 4.
[0055] In some embodiments of this application, the internal configuration of the water tank 3 is improved to enhance the pressure-bearing capacity of the water tank sealing end plates 41 on both sides of the water tank 3. A plurality of round steel bracing bars 31 are provided inside the water tank 3 to enhance the pressure-bearing capacity of the water tank sealing end plates 41 on both sides of the water tank 3.
[0056] In this embodiment, by reducing the number of heat pipe perforations in the water tank sealing end plate 41 and adding round steel bracing 31 to improve the pressure resistance of the water tank, the overall safety and stability of the heat exchange device operation are improved.
[0057] In some embodiments of this application, the connecting parts of the water tank 3 are improved to facilitate the entry of circulating water into the water tank for heat exchange. A water tank inlet 32 is provided on the lower side of the water tank 3, and the water tank inlet 32 is connected to the circulating water inlet pipe.
[0058] In some embodiments of this application, the connecting parts of the water tank 3 are improved to facilitate the discharge of circulating water from the water tank. The water tank 3 is provided with a water tank outlet 33 on its upper side, and the water tank outlet 33 is connected to the circulating water outlet pipe.
[0059] In this embodiment, circulating water enters the water tank 3 through the water tank inlet 32 on the side of the water tank 3. The inlet water temperature is generally controlled at around 65°C. After absorbing the heat transferred from the heat exchange tube body 1, the circulating water enters the return water pipe through the water tank outlet 33. The return water temperature is generally controlled at around 95°C. The flue gas temperature on the flue gas side can be reduced from around 145°C to around 110°C.
[0060] This application discloses a pressure heat exchange device for preventing leakage and blockage, including a heat exchange tube body 1, a support plate 11 on the heat exchange tube body 1, a dummy tube 12 at one end of the heat exchange tube body 1, and supporting square steel around the heat exchange tube body; a vent valve 2 installed at one end of the heat exchange tube body 1 where the dummy tube 13 is located; a water tank 3 located at the other end of the heat exchange tube body 1; and a leakage and blockage prevention mechanism 4 located between the heat exchange tube body 1 and the water tank 3, the leakage and blockage prevention mechanism 4 being used to isolate flue gas from the water tank.
[0061] The specific working principle of this application is as follows:
[0062] (1) First, the flue gas on the flue gas side transfers heat to the medium inside the heat exchange tube body 1 by flushing it. The medium inside the heat exchange tube absorbs heat and vaporizes, and the heat is carried to the water tank side by the steam. In the water tank 3, it exchanges heat with the circulating water. After the medium inside the heat exchange tube releases heat, it cools down into a liquid and returns to the flue gas side by gravity. This cycle repeats to cool the flue gas. (2) After the heat exchange tube body 1 has been running for a long time, non-condensable gas will be generated. The non-condensable gas accumulates on the water tank side, affecting the heat exchange efficiency on the water tank side. At this time, the failed heat exchange tube can be regenerated by the air exchange valve 2 at the end of the heat exchange tube body 1. The air exchange valve 2 is installed at the bottom of the heat exchange tube body, and the medium inside the heat exchange tube body 1 can be completely replaced at the same time. The overall regeneration effect of the heat exchange tube body 1 is better. (3) The flue gas and the circulating water are doubly isolated by the anti-leakage and blockage mechanism 4. At the same time, the flue gas side and the circulating water side are sealed and isolated by the sealing casting material in the anti-leakage and blockage space, which improves the safety and stability of the heat exchange device. (4) The pressure resistance of water tank 3 has been further improved. Round steel tie rods 31 are used to reinforce the sealing end plate 41 of the water tank. At the same time, the number of heat pipe perforations of the sealing end plate 41 of the water tank is reduced, and the pressure resistance of the water tank can reach 3.0MPa.
[0063] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, not all embodiments. The scope of protection of the present invention is not limited thereto. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention. It should be pointed out that for those skilled in the art and any person skilled in the art, any equivalent substitutions or changes made to the technical solutions and inventive concepts of the present invention, as well as any changes and improvements made, without departing from the overall concept and spirit of the present invention, should also be considered within the scope of protection of the present invention.
Claims
1. A pressure heat exchange device for preventing leakage and blockage, characterized in that, include: The heat exchange tube body is provided with a support plate, a dummy tube is provided at one end of the heat exchange tube body, and supporting square steel is provided around the heat exchange tube body. A ventilation valve is installed at the end of the heat exchange tube body where a dummy tube is provided; A water tank is disposed at the other end of the heat exchange tube body; A leak-proof and blockage-proof mechanism is provided between the heat exchange tube body and the water tank, and the leak-proof and blockage-proof mechanism is used to isolate the flue gas from the water tank; The anti-leakage and blockage mechanism includes a water tank sealing end plate, a flue plate, and a steel plate; The water tank sealing end plate is disposed on both sides of the water tank, the flue plate is disposed on one side of the heat exchange tube body, and the steel plate is used to connect the water tank sealing end plate and the flue plate. The water tank sealing end plate on one side of the water tank forms a sealed space with the flue plate and the steel plate. The heat exchange tube body passes through the sealing end plate of the water tank on the flue gas side, and the end of the heat exchange tube body is located inside the water tank. The tube penetration position between the water tank and the sealing end plate of the water tank on the flue gas side is sealed by welding.
2. The pressure heat exchanger for preventing leakage and blockage according to claim 1, characterized in that, A sealing ring is provided on the flue plate, which is used to seal the gap between the flue plate and the heat exchange tube body at the tube penetration position.
3. The pressure heat exchanger for preventing leakage and blockage according to claim 2, characterized in that, The water tank sealing end plate and flue plate of the anti-leakage and anti-blockage mechanism are provided with a sealing casting material layer inside, which is used for sealing and heat insulation.
4. The pressure heat exchanger for preventing leakage and blockage according to claim 1, characterized in that, The bottom of the anti-leakage blocking mechanism is equipped with a drain pipe, and a drain valve is installed on the drain pipe. The drain pipe is used to drain the water that leaks from the anti-leakage blocking mechanism.
5. The pressure heat exchanger for preventing leakage and blockage according to claim 1, characterized in that, The water tank is equipped with several round steel bracing bars, which are used to enhance the pressure-bearing capacity of the sealing end plates on both sides of the water tank.
6. The pressure heat exchanger for preventing leakage and blockage according to claim 1, characterized in that, The water tank has a water inlet on its lower side, and the water inlet is connected to the circulating water inlet pipe.
7. A pressure heat exchanger for preventing leakage and blockage according to claim 1, characterized in that, The water tank has a water tank outlet on its upper side, and the water tank outlet is connected to the circulating water outlet pipe.