Efficient and energy-saving waste heat recovery device

Abstract

The utility model discloses an efficient energy-saving waste heat recovery device, which belongs to the technical field of boilers and comprises a heat collection cavity and a heat exchange cavity, the heat collection cavity is positioned in the middle below the heat exchange cavity and is provided with an isolation plate, and a plurality of corrugated heat exchange tubes are longitudinally arranged in the heat collection cavity and the heat exchange cavity in a staggered manner. Fin heat exchange plates are arranged on the portions, on the two sides of the corrugated heat exchange pipe, of the heat collection cavity and the heat exchange cavity. A first filtering assembly and a second filtering assembly are arranged at the flue gas inlet pipe, the flue gas inlet pipe and the hot gas outlet pipe are of a double-layer structure, and the double-layer structure is filled with heat preservation cotton. Through the flue gas inlet pipe and the hot gas outlet pipe which are of a double-layer structure and filling heat preservation cotton, heat loss is effectively reduced, the energy utilization efficiency is improved, the flue gas inlet pipe reduces pollution of particulate matter in flue gas to the heat collection cavity and the heat collection pipe through multiple filtering assemblies, the heat collection efficiency is improved, and the energy utilization efficiency is improved. The contact area is increased on the surfaces of the corrugated heat exchange tube and the fin heat exchange plate, and the nano coating is sprayed, so that the heat radiation capacity is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of boiler technology, specifically relating to a high-efficiency and energy-saving waste heat recovery device. Background Technology

[0002] With the rapid development of industrial production, energy consumption is increasing daily, making the effective recovery and utilization of waste heat generated during industrial processes a crucial issue. Existing waste heat recovery devices have limitations in heat exchange efficiency, structural design, and material selection, resulting in low recovery efficiency and significant energy waste. Furthermore, the damage to heat exchange equipment caused by particulate matter and corrosive substances in flue gas is also a significant factor affecting waste heat recovery efficiency. Therefore, developing a waste heat recovery device with a reasonable structure, high heat exchange efficiency, corrosion resistance, and ash resistance is of great significance for improving energy utilization efficiency and reducing industrial production costs. Summary of the Invention

[0003] To address the aforementioned problems, this utility model discloses a highly efficient and energy-saving waste heat recovery device. Through a double-layered flue gas inlet pipe and hot gas outlet pipe, filled with insulation cotton, heat loss is effectively reduced, improving energy utilization efficiency. The flue gas inlet pipe uses multiple filtration components to reduce the contamination of the heat collection chamber and heat collection pipe by particulate matter in the flue gas, improving heat collection efficiency. Furthermore, by increasing the contact area on the corrugated heat exchange tube and finned heat exchange plate surface and applying a nano-coating, the thermal radiation capacity is enhanced.

[0004] To achieve the above objectives, the specific technical solution of this application is as follows:

[0005] A high-efficiency and energy-saving waste heat recovery device includes a heat collection chamber and a heat exchange chamber. The heat collection chamber is located below the heat exchange chamber and has an isolation plate in the middle. Several corrugated heat exchange tubes are arranged longitudinally and staggered between the heat collection chamber and the heat exchange chamber. Finned heat exchange plates are provided on both sides of the corrugated heat exchange tubes in the heat collection chamber and the heat exchange chamber. A flue gas inlet pipe connected to the boiler body is provided on one side of the heat collection chamber, and a flue gas outlet pipe is provided on the other side. An induced draft fan is provided at the flue gas outlet pipe, and the flue gas outlet pipe is connected to the combustion chamber. The combustion chamber is connected to the flue gas exhaust chimney. An air inlet pipe and a hot gas outlet pipe are provided on both sides of the heat exchange chamber. A blower is provided at the air inlet pipe. A first filter assembly and a second filter assembly are provided at the flue gas inlet pipe. The flue gas inlet pipe and the hot gas outlet pipe have a double-layer structure, and the double-layer structure is filled with heat insulation cotton.

[0006] Based on the above technical features, furthermore, the corrugated heat exchange tube and the finned heat exchange plate are all sealed together with the isolation plate.

[0007] Based on the above technical features, preferably, both the corrugated heat exchange tube and the finned heat exchange plate are coated with a nano-coating to improve their thermal radiation capacity, thereby enhancing heat exchange efficiency.

[0008] Based on the above technical features, furthermore, a flue gas circulation pipe is connected to the flue gas outlet pipe via a three-way solenoid valve, and the other end of the flue gas circulation pipe is connected to the flue gas inlet pipe. A one-way valve is provided at the connection between the flue gas circulation pipe 19 and the flue gas inlet pipe.

[0009] Based on the above technical features, the three-way solenoid valve is further provided with an electronic temperature monitor at its front end.

[0010] Based on the above technical features, preferably, the flue gas circulation pipe has a double-layer structure, and the double-layer structure is filled with heat insulation cotton.

[0011] Compared with the prior art, the beneficial effects of this application are as follows:

[0012] 1. This application improves filtration efficiency and reduces the contamination of the heat collection chamber and heat collection tube by setting a first filter assembly and a second filter assembly at the flue gas inlet pipe, thereby improving heat collection efficiency.

[0013] 2. The double-layered flue gas inlet pipe and hot gas outlet pipe are filled with insulation cotton, which effectively reduces heat loss and improves energy utilization efficiency.

[0014] 3. The flue gas outlet pipe is connected to a flue gas circulation pipe through a three-way solenoid valve. The three-way electronic valve determines the valve opening and closing status through an electronic temperature monitor. When the flue gas outlet temperature is higher than the threshold, it continues to return to the collector for heat exchange again, which improves the recovery efficiency.

[0015] 4. The corrugated heat exchange tubes and finned heat exchange plates increase the contact area and improve heat transfer efficiency. The nano-coating not only improves heat exchange efficiency but also enhances the equipment's corrosion resistance and dust accumulation resistance, extending the equipment's service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a high-efficiency and energy-saving waste heat recovery device according to the present invention;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the flue gas inlet pipe in a high-efficiency and energy-saving waste heat recovery device of this utility model.

[0018] List of identifiers in attached diagrams:

[0019] 1. Flue gas inlet pipe; 2. Insulation cotton; 3. First filter assembly; 4. Second filter assembly; 5. Heat collection chamber; 6. Heat exchange chamber; 7. Isolation plate; 8. Corrugated heat exchange tube; 9. Finned heat exchange plate; 10. Flue gas outlet pipe; 11. Electronic temperature monitor; 12. Three-way solenoid valve; 13. Exhaust fan; 14. Combustion chamber; 15. Chimney; 16. Blower; 17. Air inlet pipe; 18. Hot air outlet pipe; 19. Flue gas circulation pipe; 20. One-way valve. Detailed Implementation

[0020] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0021] It should be noted that the terms "upper," "lower," "left," "right," "front," and "rear" used in the following description refer to the directions shown in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Furthermore, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1 As shown, one embodiment of a high-efficiency and energy-saving waste heat recovery device includes a heat collection chamber 5 and a heat exchange chamber 6. The heat collection chamber 5 is located below the heat exchange chamber 6 and is provided with an isolation plate 7 in the middle.

[0023] The heat collection chamber 5 and the heat exchange chamber 6 are longitudinally staggered with several corrugated heat exchange tubes 8. The heat collection chamber and the heat exchange chamber are provided with finned heat exchange plates 9 on both sides of the corrugated heat exchange tubes. One side of the heat collection chamber 5 is provided with a flue gas inlet pipe 1 connected to the boiler body, and the other side is provided with a flue gas outlet pipe 10. An induced draft fan 13 is provided at the flue gas outlet pipe 10. The flue gas outlet pipe is connected to the combustion chamber 14, and the combustion chamber is connected to the flue gas emission chimney 15.

[0024] The heat exchange chamber 6 is provided with an air inlet pipe 17 and a hot air outlet pipe 18 on both sides, and a blower 16 is provided at the air inlet pipe.

[0025] The flue gas inlet pipe 1 is equipped with a first filter assembly 3 and a second filter assembly 4 to reduce the pollution of the heat collection chamber and heat collection pipe by particulate matter in the flue gas and improve the heat collection efficiency.

[0026] The flue gas inlet pipe 1 and the hot gas outlet pipe 18 have a double-layer structure, and the double-layer structure is filled with thermal insulation cotton 2.

[0027] The corrugated heat exchange tubes and finned heat exchange plates are all sealed to the isolation plate.

[0028] Both the corrugated heat exchange tube 8 and the finned heat exchange plate 9 are coated with a nano-coating to enhance their thermal radiation capacity, thereby improving heat exchange efficiency.

[0029] The flue gas outlet pipe is connected to a flue gas circulation pipe 19 via a three-way solenoid valve 12. The other end of the flue gas circulation pipe 19 is connected to the flue gas inlet pipe 1. A one-way valve is provided at the connection between the flue gas circulation pipe 19 and the flue gas inlet pipe, allowing only one-way passage.

[0030] The three-way solenoid valve is equipped with an electronic temperature monitor 11 at its front end. The three-way electronic valve determines the valve opening and closing status through the electronic temperature monitor. When the flue gas outlet temperature is higher than the threshold, it continues to return to the collector for heat exchange, thereby improving the recovery efficiency.

[0031] The flue gas circulation pipe has a double-layer structure, and the double-layer structure is filled with thermal insulation cotton 2.

[0032] Preferably, the first filter assembly 3 is located before the connection between the flue gas recirculation duct 19 and the flue gas inlet pipe, and the second filter assembly is located after the connection between the flue gas recirculation duct 19 and the flue gas inlet pipe.

[0033] Workflow:

[0034] Flue gas enters the boiler body through the flue gas inlet pipe 1, passes through the first filter assembly 3 and the second filter assembly 4 to remove particulate matter from the flue gas, and then enters the heat collection chamber 5.

[0035] Flue gas is transferred to heat exchange chamber 6 through corrugated heat exchange tube 8 and finned heat exchange plate 9 in heat collection chamber 5. Air is introduced into heat exchange chamber 6 through air inlet pipe 17 on one side of heat exchange chamber 6 by blower 16. The air is heated in heat exchange chamber 6 and then output through hot gas outlet pipe 18.

[0036] The electronic temperature monitor 11 monitors the flue gas temperature. When the temperature is higher than the set value, the three-way solenoid valve 12 opens to connect the flue gas circulation pipe 19 back to the heat collection chamber 5 for secondary heat exchange.

[0037] The double-layer structure of the flue gas inlet pipe 1 and the hot gas outlet pipe 18 effectively reduces heat loss and improves energy utilization efficiency.

[0038] It should be noted that the accompanying drawings merely illustrate the technical concept of the present invention and should not be used to limit the scope of protection of the present invention. For those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A high-efficiency and energy-saving waste heat recovery device, characterized in that: The system includes a heat collection chamber and a heat exchange chamber. The heat collection chamber is located below the heat exchange chamber and has an isolation plate in the middle. Several corrugated heat exchange tubes are arranged longitudinally and staggered between the heat collection chamber and the heat exchange chamber. Finned heat exchange plates are provided on both sides of the corrugated heat exchange tubes in the heat collection chamber and the heat exchange chamber. A flue gas inlet pipe is provided on one side of the heat collection chamber and a flue gas outlet pipe is provided on the other side. An induced draft fan is provided at the flue gas outlet pipe, and the flue gas outlet pipe is connected to the combustion chamber. The combustion chamber is connected to the flue gas exhaust chimney. An air inlet pipe and a hot gas outlet pipe are provided on both sides of the heat exchange chamber. A blower is provided at the air inlet pipe. A first filter assembly and a second filter assembly are provided at the flue gas inlet pipe. The flue gas inlet pipe and the hot gas outlet pipe have a double-layer structure, and the double-layer structure is filled with heat insulation cotton.

2. The high-efficiency and energy-saving waste heat recovery device according to claim 1, characterized in that: The corrugated heat exchange tubes and finned heat exchange plates are all sealed to the isolation plate.

3. The high-efficiency and energy-saving waste heat recovery device according to claim 1, characterized in that: Both the corrugated heat exchange tube and the finned heat exchange plate are coated with a nano-coating.

4. The high-efficiency and energy-saving waste heat recovery device according to claim 1, characterized in that: The flue gas outlet pipe is connected to a flue gas circulation pipe via a three-way solenoid valve. The other end of the flue gas circulation pipe is connected to the flue gas inlet pipe. A one-way valve is provided at the connection between the flue gas circulation pipe and the flue gas inlet pipe.

5. The high-efficiency and energy-saving waste heat recovery device according to claim 4, characterized in that: The three-way solenoid valve is equipped with an electronic temperature monitor at its front end.

6. The high-efficiency and energy-saving waste heat recovery device according to claim 4, characterized in that: The flue gas circulation duct has a double-layer structure, with insulation cotton filling the double-layer structure.

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