Heat pipe type low-temperature economizer

Abstract

The utility model relates to the technical field of waste heat recovery, and discloses a heat pipe type low-temperature economizer, which is characterized by comprising a heat exchange outer box, an isolation mounting block and a heat pipe, the heat exchange outer box comprises a fixed mounting cylinder, a flue gas cover plate and a water flow cover plate; the fixed mounting cylinder comprises an outer box top plate, an outer box rear plate, an outer box bottom plate and an outer box front plate which are correspondingly connected; the isolation mounting block is vertically arranged in the middle of the interior of the fixed mounting cylinder and divides the interior of the fixed mounting cylinder into a smoke cavity and a water flow cavity, an air inlet and a water outlet are formed in the two ends of a top plate of the outer box in a penetrating mode respectively, and an air outlet and a water inlet are formed in the two ends of a bottom plate of the outer box in a penetrating mode respectively; a plurality of parallel mounting holes are formed in the isolation mounting block in a penetrating mode, the middles of the heat pipes are fixedly arranged in the mounting holes in a penetrating mode, the evaporation ends of the heat pipes are arranged in the smoke cavity, and the condensation ends of the heat pipes are arranged in the water flow cavity; path guide plates are arranged in the flue gas cavity and the water flow cavity, and the flue gas cavity and the water flow cavity are separated by the path guide plates to form a continuous S-shaped channel.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, and more specifically, it relates to a heat pipe type low-temperature economizer. Background Technology

[0002] With the rapid development of industrial production, energy consumption and environmental pollution have become increasingly prominent issues. In industries such as power, steel, chemicals, and building materials, large amounts of high-temperature flue gas are directly emitted into the atmosphere, causing not only energy waste but also severe environmental pollution. To improve energy efficiency and reduce energy consumption and environmental pollution, waste heat recovery technology has been widely applied.

[0003] Economizers, as a common waste heat recovery device, are mainly used to recover waste heat from the flue gas at the tail end of a boiler and transfer it to the boiler feedwater, thereby improving the boiler's thermal efficiency. Traditional economizers typically employ shell-and-tube or finned-tube structures, achieving waste heat recovery through heat exchange between the flue gas and feedwater. However, traditional economizers suffer from the following problems when handling low-temperature flue gas: low heat exchange efficiency: low-temperature flue gas has a low enthalpy, and the heat exchange efficiency of traditional economizers is limited, making it difficult to effectively recover waste heat from the low-temperature flue gas.

[0004] To address the aforementioned issues, heat pipe technology has been incorporated into economizer design. A heat pipe is a highly efficient heat transfer element that achieves rapid heat transfer through the phase change of the working fluid, offering advantages such as high heat transfer efficiency, compact structure, and no need for external power. Heat pipe-type low-temperature economizers utilize heat pipe technology to effectively recover waste heat from low-temperature flue gas, demonstrating broad application prospects.

[0005] However, existing heat pipe-type low-temperature economizers still have some shortcomings in practical applications, such as unreasonable arrangement of heat pipes and related mechanisms, and low heat exchange efficiency, which limit their further promotion and application. Therefore, it is necessary to develop a high-efficiency and reliable heat pipe-type low-temperature economizer. Utility Model Content

[0006] The purpose of this invention is to provide a heat pipe type low-temperature economizer, which extends the flue gas flow path and water flow path through the path guide plate, thereby extending the heat exchange time and making heat recovery more complete and efficient.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a heat pipe type low-temperature economizer, including a heat exchange outer box, an isolation mounting block, and a plurality of heat pipes;

[0008] The heat exchange outer casing includes a fixed mounting cylinder, a flue gas cover plate, and a water flow cover plate. The fixed mounting cylinder includes a correspondingly connected outer casing top plate, outer casing rear plate, outer casing bottom plate, and outer casing front plate.

[0009] The isolation mounting block is vertically disposed in the middle of the interior of the fixed mounting cylinder, dividing the interior of the fixed mounting cylinder into a flue gas chamber and a water flow chamber. The flue gas cover plate is sealed to the end of the fixed mounting cylinder corresponding to the flue gas chamber, and the water flow cover plate is sealed to the end of the fixed mounting cylinder corresponding to the water flow chamber. An air inlet and a water outlet are respectively provided through both ends of the top plate of the outer casing, and an air outlet and a water inlet are respectively provided through both ends of the bottom plate of the outer casing.

[0010] The isolation mounting block is provided with several parallel mounting holes, the middle part of the heat pipe is fixedly inserted into the mounting holes, the evaporation end of the heat pipe is located in the flue gas chamber, and the condensation end of the heat pipe is located in the water flow chamber.

[0011] The flue gas chamber and the water flow chamber are respectively provided with a number of path guide plates, which separate the flue gas chamber and the water flow chamber into a continuous S-shaped channel.

[0012] As a preferred embodiment of this utility model, the front side of the path guide plate abuts against the inner side of the front panel of the outer casing, and the rear side of the path guide plate abuts against the inner side of the rear panel of the outer casing. Both the front and rear sides of the path guide plate are provided with sealing gaskets.

[0013] As a preferred embodiment of the present invention, the path guide plate in the water flow cavity includes an inner water guide plate and an outer water guide plate arranged at intervals, and the path guide plate in the flue gas cavity includes an inner smoke guide plate and the outer smoke guide plate arranged at intervals.

[0014] The outer side of the outer water guide plate is vertically and fixedly connected to the inner side of the water flow cover plate, and the inner side of the inner water guide plate is vertically abutting against the isolation mounting block. A connecting rod is connected between the outer side of the inner water guide plate and the inner side of the water flow cover plate.

[0015] The outer edge of the outer smoke guide plate is vertically and fixedly connected to the inner side of the smoke cover plate, and the inner edge of the inner smoke guide plate is vertically abutting against the isolation mounting block. A connecting rod is connected between the outer edge of the inner smoke guide plate and the inner side of the smoke cover plate.

[0016] As a preferred technical solution of this utility model, a scraper is provided inside the flue gas chamber. The scraper is attached to the surface of the isolation mounting block. The scraper has scraping holes corresponding to the position of the heat pipe. A scraping connecting rod is provided between one side of the scraper and the inner side of the outer smoke guide plate. One side of the scraper is vertically fixedly connected to the inner side of the inner smoke guide plate.

[0017] As a preferred embodiment of this utility model, mounting buckles are respectively provided between the water flow cover and the fixed mounting cylinder, and between the flue gas cover and the fixed mounting cylinder.

[0018] As a preferred embodiment of this utility model, a sealing gasket is provided on the inner side of the inner water guide plate.

[0019] As a preferred embodiment of this utility model, the outer side of the fixed installation cylinder, the outer side of the water flow cover, and the outer side of the flue gas cover are respectively provided with heat insulation layers.

[0020] In summary, this utility model has the following beneficial effects: The heat pipe-type low-temperature economizer is sealed, ensuring that the flue gas chamber and water flow chamber are sealed except for the inlet and outlet of the medium, forming a stable medium flow channel. After the flue gas chamber and water flow chamber are installed, flue gas for waste heat recovery is introduced into the air inlet, and water to be heated is introduced into the water inlet. At this time, the flue gas enters the flue gas chamber and, under the action of the path guide plate, flows through an S-shaped channel. During this flow, it passes through the evaporation end of the heat pipe, absorbing heat from the flue gas under the evaporation action of the heat pipe itself, and transferring it to the condensation end. At this time, water flows through the condensation end in an S-shaped channel, and under the action of the heat pipe itself, the heat from the condensation end is transferred to the water flow, heating the water. With the continuous flow of water and flue gas, the heat in the flue gas can be continuously transferred to the water flow, achieving the recovery of flue gas heat and the heating of water, thus achieving full utilization of energy. Throughout the heat recovery process, the flow paths of the flue gas and water are extended using a guide vane, allowing for longer heat exchange time and thus more thorough and efficient heat recovery. Furthermore, the flue gas and water flow paths are reversed to ensure proper temperature control at both ends of the heat pipe, resulting in better water heating and higher heat recovery efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram showing the disassembled state of the flue gas cover and water flow cover of this utility model.

[0023] In the diagram: 1. Isolation mounting block; 2. Heat pipe; 3. Fixed mounting cylinder; 4. Flue gas cover plate; 5. Water flow cover plate; 6. Outer casing top plate; 7. Outer casing bottom plate; 8. Flue gas chamber; 9. Water flow chamber; 10. Air inlet; 11. Water outlet; 12. Air outlet; 13. Water inlet; 14. Inner water guide plate; 15. Outer water guide plate; 16. Outer smoke guide plate; 17. Inner smoke guide plate; 18. Connecting rod; 19. Ash scraper; 20. Ash scraper hole; 21. Ash scraper connecting rod; 22. Mounting connector buckle. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Therefore, the following detailed description of the embodiments of this utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0025] like Figure 1 and 2 As shown, this utility model provides a heat pipe 2 type low temperature economizer, including a heat exchange outer box, an isolation mounting block 1, and a plurality of heat pipes 2;

[0026] The heat exchange outer casing includes a fixed mounting cylinder 3, a flue gas cover plate 4, and a water flow cover plate 5. The fixed mounting cylinder 3 includes a correspondingly connected outer casing top plate 6, outer casing rear plate, outer casing bottom plate 7, and outer casing front plate.

[0027] The isolation mounting block 1 is vertically installed in the middle of the fixed mounting cylinder 3. The isolation mounting block 1 divides the interior of the fixed mounting cylinder 3 into a flue gas chamber 8 and a water flow chamber 9. The flue gas cover plate 4 is sealed to the end of the fixed mounting cylinder 3 corresponding to the flue gas chamber 8, and the water flow cover plate 5 is sealed to the end of the fixed mounting cylinder 3 corresponding to the water flow chamber 9. The top plate 6 of the outer box is provided with an air inlet 10 and a water outlet 11 through both ends, and the bottom plate 7 of the outer box is provided with an air outlet 12 and a water inlet 13 through both ends.

[0028] Installation connecting buckles 22 are respectively provided between the water flow cover plate 5 and the fixed installation cylinder 3, and between the flue gas cover plate 4 and the fixed installation cylinder 3, for the overall sealing and fixed installation of the heat exchange outer box.

[0029] The isolation mounting block 1 has several parallel mounting holes through it. The middle part of the heat pipe 2 is fixedly inserted into the mounting hole. The evaporation end of the heat pipe 2 is located in the flue gas chamber 8, and the condensation end of the heat pipe 2 is located in the water flow chamber 9.

[0030] Several path guide plates are respectively installed in the flue gas chamber 8 and the water flow chamber 9, which divide the flue gas chamber 8 and the water flow chamber 9 into a continuous S-shaped channel.

[0031] The working principle and technical advantages of this heat pipe 2 type low-temperature economizer are as follows: The heat pipe 2 type low-temperature economizer is sealed, ensuring that the flue gas chamber 8 and water flow chamber 9 are sealed except for the inlet and outlet of the medium, forming a stable medium flow channel. After the flue gas chamber 8 and water flow chamber 9 are installed, flue gas for waste heat recovery is introduced into the air inlet 10, and water to be heated is introduced into the water inlet 13. At this time, the flue gas enters the flue gas chamber 8 and flows through an S-shaped channel under the action of the path guide plate. During the flow, it passes through the evaporation end of the heat pipe 2, absorbing heat from the flue gas under the evaporation action of the heat pipe 2 itself, and transferring it to the condensation end. At this time, water flows through the condensation end in an S-shaped channel, and under the action of the heat pipe 2 itself, the heat at the condensation end is transferred to the water flow, heating the water flow. With the continuous flow of water and flue gas, the heat in the flue gas can be continuously transferred to the water flow, realizing the recovery of heat from the flue gas and the heating of the water flow, achieving full utilization of energy. Throughout the heat recovery process, the flow paths of the flue gas and water are extended through the flow guide plate, thus prolonging the heat exchange time and making heat recovery more complete and efficient. Furthermore, the flue gas and water flow paths are reversed to ensure the temperature difference between the two ends inside heat pipe 2, resulting in better water heating and higher heat recovery efficiency.

[0032] As an embodiment of this utility model, the front side of the path guide plate abuts against the inner side of the front panel of the outer casing, and the rear side of the path guide plate abuts against the inner side of the rear panel of the outer casing. Both the front and rear sides of the path guide plate are provided with sealing gaskets to isolate the flue gas passage and the water flow passage.

[0033] Specifically, the path guide plate in the water flow chamber 9 includes an inner water guide plate 14 and an outer water guide plate 15 arranged at intervals, and the path guide plate in the flue gas chamber 8 includes an inner smoke guide plate 17 and an outer smoke guide plate 16 arranged at intervals; a sealing gasket is provided on the inner side of the inner water guide plate 14.

[0034] The outer side of the outer water guide plate 15 is vertically fixed to the inner side of the water flow cover plate 5, and the inner side of the inner water guide plate 14 is vertically abutting against the isolation mounting block 1. A connecting rod 18 is connected between the outer side of the inner water guide plate 14 and the inner side of the water flow cover plate 5, so that the inner water guide plate 14 can also be disassembled together with the water flow cover plate 5.

[0035] The outer edge of the outer smoke guide plate 16 is vertically fixed to the inner side of the smoke cover plate 4, and the inner edge of the inner smoke guide plate 17 is vertically abutting against the isolation mounting block 1. A connecting rod 18 is connected between the outer edge of the inner smoke guide plate 17 and the inner side of the smoke cover plate 4, so that the inner smoke guide plate 17 can also be disassembled together with the smoke cover plate 4.

[0036] After the flue gas cover plate 4 and the water flow cover plate 5 are disassembled, all the path guide plates are taken out together, leaving only the heat pipe 2 in the flue gas chamber 8 and the water flow chamber 9, which facilitates the actual cleaning of flue gas dust and scale.

[0037] As an embodiment of this utility model, a scraper plate 19 is arranged inside the flue gas chamber 8. The scraper plate 19 is attached to the surface of the isolation mounting block 1. A scraper hole 20 is provided on the scraper plate 19 corresponding to the position of the heat pipe 2. A scraper connecting rod 21 is provided between one side of the scraper plate 19 and the inner side of the outer smoke guide plate 16. One side of the scraper plate 19 is vertically fixedly connected to the inner side of the inner smoke guide plate 17, so that the scraper plate 19 can be taken out simultaneously when the flue gas cover plate 4 is removed. The four edges of the scraper plate 19 are respectively attached to the inner wall of the fixed mounting cylinder 3, and the hole wall of the scraper hole 20 is attached to the outer wall of the heat pipe 2. When the scraper plate 19 moves outward, the accumulated dust on the inner wall of the fixed mounting cylinder 3 and the outer side of the heat pipe 2 can be scraped off, making the dust treatment simpler and reducing the difficulty of subsequent dust treatment.

[0038] As an embodiment of this utility model, the outer side of the fixed installation cylinder 3, the outer side of the water flow cover plate 5, and the outer side of the flue gas cover plate 4 are respectively provided with heat insulation layers to reduce heat dissipation and save energy.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. 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 heat pipe type low-temperature economizer, characterized in that: Includes a heat exchange outer casing, an isolation mounting block (1), and several heat pipes (2); The heat exchange outer box includes a fixed installation cylinder (3), a flue gas cover plate (4) and a water flow cover plate (5). The fixed installation cylinder (3) includes a correspondingly connected outer box top plate (6), outer box rear plate, outer box bottom plate (7) and outer box front plate. The isolation mounting block (1) is vertically disposed in the middle of the interior of the fixed mounting cylinder (3). The isolation mounting block (1) divides the interior of the fixed mounting cylinder (3) into a flue gas chamber (8) and a water flow chamber (9). The flue gas cover plate (4) is sealed to one end of the fixed mounting cylinder (3) corresponding to the flue gas chamber (8). The water flow cover plate (5) is sealed to one end of the fixed mounting cylinder (3) corresponding to the water flow chamber (9). The top plate (6) of the outer box is provided with an air inlet (10) and a water outlet (11) through both ends. The bottom plate (7) of the outer box is provided with an air outlet (12) and a water inlet (13) through both ends. The isolation mounting block (1) is provided with several parallel mounting holes. The middle part of the heat pipe (2) is fixedly installed in the mounting holes. The evaporation end of the heat pipe (2) is located in the flue gas chamber (8), and the condensation end of the heat pipe (2) is located in the water flow chamber (9). Several path guide plates are respectively provided in the flue gas chamber (8) and the water flow chamber (9), and the path guide plates divide the flue gas chamber (8) and the water flow chamber (9) into a continuous S-shaped channel.

2. The heat pipe type low-temperature economizer according to claim 1, characterized in that: The front side of the path guide plate abuts against the inner side of the front panel of the outer casing, and the rear side of the path guide plate abuts against the inner side of the rear panel of the outer casing. Both the front and rear sides of the path guide plate are provided with sealing gaskets.

3. A heat pipe type low-temperature economizer according to claim 2, characterized in that: The path guide plate in the water flow cavity (9) includes an inner water guide plate (14) and an outer water guide plate (15) arranged at intervals, and the path guide plate in the flue gas cavity (8) includes an inner smoke guide plate (17) and an outer smoke guide plate (16) arranged at intervals. The outer side of the outer water guide plate (15) is vertically fixed to the inner side of the water flow cover plate (5), the inner side of the inner water guide plate (14) is vertically abutting against the isolation mounting block (1), and a connecting rod (18) is connected between the outer side of the inner water guide plate (14) and the inner side of the water flow cover plate (5). The outer side of the outer smoke guide plate (16) is vertically fixed to the inner side of the smoke cover plate (4), the inner side of the inner smoke guide plate (17) is vertically abutting against the isolation mounting block (1), and a connecting rod (18) is connected between the outer side of the inner smoke guide plate (17) and the inner side of the smoke cover plate (4).

4. A heat pipe type low-temperature economizer according to claim 3, characterized in that: A scraper plate (19) is provided inside the flue gas chamber (8). The scraper plate (19) is attached to the surface of the isolation mounting block (1). A scraper hole (20) is provided on the scraper plate (19) corresponding to the position of the heat pipe (2). A scraper connecting rod (21) is provided between one side of the scraper plate (19) and the inner side of the outer smoke guide plate (16). One side of the scraper plate (19) is vertically fixedly connected to the inner side of the inner smoke guide plate (17).

5. A heat pipe type low-temperature economizer according to claim 4, characterized in that: Installation connecting buckles (22) are respectively provided between the water flow cover plate (5) and the fixed installation cylinder (3), and between the flue gas cover plate (4) and the fixed installation cylinder (3).

6. A heat pipe type low-temperature economizer according to claim 5, characterized in that: A sealing gasket is provided on the inner side of the inner water guide plate (14).

7. A heat pipe type low-temperature economizer according to claim 6, characterized in that: The outer side of the fixed installation cylinder (3), the outer side of the water flow cover plate (5), and the outer side of the flue gas cover plate (4) are respectively provided with heat insulation layers.

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