Air waste heat recovery energy-saving device

Abstract

The utility model relates to the technical field of energy -conserving, concretely provides an air waste heat recovery energy -conserving device, contains the waste heat recovery ware and the air heater through VC heat sink stringing together, and the waste heat recovery ware contains the heat -resisting core and the heat dissipation shell of setting in the heat -resisting core outside, the heat -resisting core is hollow cylindrical structure, and its upper end is equipped with the exhaust port, and the heat dissipation shell and the heat -resisting core's outer periphery and bottom between leave the overheating channel, and are equipped with the hot exhaust gas import of the overheating channel intercommunication on the heat dissipation shell, and this hot exhaust gas import, overheating channel, the hollow chamber of heat -resisting core and exhaust port constitute the one -way airflow passway together, and the hot exhaust gas can pass through the heat dissipation shell and carry out heat energy diffusion when flowing in the one -way airflow passway, and the air heater can utilize the heat energy that VC heat sink transmits and carry out the heating utilization to the air, and the energy -conserving device structure compact of the scheme can realize the effective recovery and utilization of the heat energy in the hot exhaust gas based on the heat diffusion and heat migration principle, solves the existing deficiency.

Description

Technical Field

[0001] This utility model relates to the field of energy-saving technology, specifically an air waste heat recovery energy-saving device. Background Technology

[0002] In the manufacturing process of precision electronic components such as semiconductors and photovoltaics, heat treatment processes such as baking and curing are crucial production links. In such drying sections, the process equipment continuously emits high-temperature waste gas containing a large amount of heat and harmful gases. The harmful gases have complex components and are characterized by high temperature, high humidity, and the presence of toxic and harmful substances. If not handled properly, they will pose a serious threat to environmental safety and production safety.

[0003] Currently, the industry's common practice is to directly introduce hot waste gas into a specially designed wastewater cooling tower for rapid cooling and washing. However, this method results in the inability to recover heat energy from the wastewater, leading to resource waste.

[0004] Based on the above analysis, this solution designs a novel air waste heat recovery energy-saving device. Utility Model Content

[0005] The purpose of this invention is to provide an air waste heat recovery and energy-saving device to solve the problem that existing high-temperature, high-humidity, and harmful waste gases cannot be recovered, thus leading to resource waste.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An air waste heat recovery energy-saving device, comprising: A waste heat recovery unit includes a heat-insulating core and a heat dissipation shell fitted outside the heat-insulating core. The heat-insulating core is a hollow columnar structure with an exhaust port at its upper end. An overheating channel is provided between the heat dissipation shell and the outer periphery and bottom of the heat-insulating core. A hot waste gas inlet communicating with the overheating channel is provided on the heat dissipation shell. The hot waste gas inlet, the overheating channel, the hollow cavity of the heat-insulating core, and the exhaust port together constitute a one-way airflow path. When the hot waste gas flows through the one-way airflow path, it can recover heat energy through the heat dissipation shell. An air heater is connected to the waste heat recovery unit via at least one set of VC heat exchange plates. The VC heat exchange plates can transfer the heat energy recovered by the waste heat recovery unit to the air heater. The air heater includes a heat dissipation cavity that runs vertically through the air heater, which can heat the flowing cold air to meet the needs of downstream equipment.

[0007] As a preferred embodiment: The overheating channel is provided with heat dissipation fins, which are fixed to the inner wall of the heat dissipation shell and have an airflow gap between them and the inner wall of the heat insulation core. The heat dissipation fins are arranged horizontally, vertically, or spirally relative to the airflow direction.

[0008] As a preferred embodiment: The VC heat exchanger includes a first clamp and a second clamp connected in series. The first clamp serves as the condensing end and covers the outer periphery of the air heater, while the second clamp serves as the evaporating end and covers the outer periphery of the waste heat recovery unit.

[0009] As a preferred embodiment: The heat dissipation cavity of the air heater is provided with multiple sets of heat dissipation ribs. These multiple sets of heat dissipation ribs are arranged horizontally or spirally relative to the airflow direction, and the multiple sets of heat dissipation ribs form an airflow heating channel.

[0010] As a preferred embodiment: The air heater also includes a central sleeve, which is coaxially arranged with the heat dissipation cavity and forms multiple sets of heat dissipation through holes with the heat dissipation ribs, through which airflow can exchange heat.

[0011] As a preferred embodiment: The bottom of the heat sink is equipped with a dust collection box, which is connected to the bottom of the heat sink by a clamp.

[0012] As a preferred embodiment: The waste heat recovery unit is equipped with a temperature monitor to monitor the recovered heat energy.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This solution includes a waste heat recovery unit and an air heater connected in series via a VC heat exchanger. The waste heat recovery unit utilizes a unidirectional airflow path formed by a heat-insulating core and a heat dissipation shell, allowing heat energy to diffuse through the heat dissipation shell as hot waste gas flows through. Based on the thermal migration principle of the VC heat exchanger, the heat is transferred to the heat dissipation cavity of the air heater. This heat dissipation cavity uses the transferred heat energy to heat the flowing cold air to meet the needs of downstream equipment. As can be seen, this energy-saving device has a compact structure and achieves effective recovery and utilization of heat energy in hot waste gas based on the principles of thermal diffusion and thermal migration, solving the shortcomings of existing solutions and providing a theoretical basis for heat energy recovery in hot waste gas. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of the air waste heat recovery energy-saving device provided by this utility model.

[0015] Figure 2 This is a side view of the air waste heat recovery energy-saving device provided by this utility model.

[0016] Figure 3 A top view of the air waste heat recovery energy-saving device provided by this utility model.

[0017] Figure 4 A cross-sectional view of the air waste heat recovery energy-saving device provided by this utility model.

[0018] Figure 5 This is a longitudinal sectional view of an air waste heat recovery energy-saving device provided by the present invention.

[0019] Figure 6 A longitudinal sectional view of another air waste heat recovery energy-saving device provided by this utility model.

[0020] Figure Labels

[0021] 10 is the waste heat recovery unit; 11 is the heat insulation core; 12 is the heat dissipation shell; 13 is the exhaust port; 14 is the hot waste gas inlet; 15 is the overheating channel; 16 is the heat dissipation fins; 17 is the temperature monitor; 18 is the dust collection box; 19 is the clamp; 20 is an air heater; 21 is a heat dissipation cavity; 22 is a heat dissipation rib; 23 is a central sleeve; 24 is a heat dissipation through hole; 25 is an air outlet; 30 is a VC heat spreader. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of the present invention.

[0023] This embodiment provides an air waste heat recovery energy-saving device, such as... Figure 1-2As shown, the energy-saving device includes a waste heat recovery unit 10 and an air heater 20. The waste heat recovery unit 10 includes a heat-insulating core 11 and a heat dissipation shell 12 fitted over the heat-insulating core 11. The heat-insulating core 11 is a hollow cylindrical structure with an exhaust port 13 at its upper end. An overheating channel 15 is provided between the heat dissipation shell 12 and the outer periphery and bottom of the heat-insulating core 11. A hot waste gas inlet 14 communicating with the overheating channel is provided on the heat dissipation shell 12. The hot waste gas inlet 14, the overheating channel 15, the hollow cavity of the heat-insulating core 11, and the exhaust port 13 together constitute a unidirectional airflow path. This unidirectional airflow path is a "V"-shaped or "Z"-shaped curved path, which can effectively increase the residence time of the hot waste gas in the unidirectional airflow path, thereby improving the heat exchange efficiency. In this embodiment, the main function of the heat-insulating core 11 is to cooperate with the heat dissipation unit. The shell 12 forms an overheating channel 15 and blocks the hot airflow from diffusing outward through the hollow cavity of the heat-insulating core 11. The heat dissipation shell 12 wraps around the outside of the heat-insulating core 11 to facilitate heat diffusion. The external structure of the air heater 20 is similar to that of the waste heat recovery unit 10. The air heater 20 and the waste heat recovery unit 10 are connected by at least one set of VC heat exchange plates 30. The VC heat exchange plates 30 can exchange heat with the heat energy diffused by the waste heat recovery unit 10 and transfer it to the air heater 20. The air heater 20 includes a heat dissipation cavity 21 that runs vertically through the air. Preferably, the upper end is the air inlet and the lower end is the air outlet 25. The cold air flowing through the heat dissipation cavity 21 can be heated to meet the needs of downstream equipment. It is understood that, if necessary, a negative pressure fan or the like can be connected to the air outlet 25 to accelerate the airflow speed.

[0024] Specifically, in this embodiment, the waste heat recovery unit 10 is the waste heat recovery end. When the hot waste gas flows in the unidirectional airflow passage, the heat in the hot waste gas is diffused through the heat dissipation shell 12. Then, the heat is exchanged with the diffused heat energy through the evaporation end of the VC heat spreader 30. The recovered hot gas is transferred to the air heater 20 through the condensation end of the VC heat spreader. The air heater 20 serves as the waste heat utilization end and can use the transferred heat to heat the ambient air flowing through it, thus realizing the recovery and utilization of waste heat. It should be noted that the temperature at the end of the air heater 20 must always be lower than that at the end of the waste heat recovery unit 10 to ensure that the heat is effectively and normally transferred.

[0025] The principle and structure of the VC heat spreader 30 are existing mature technologies, and will not be described in detail in this embodiment. In this embodiment, the VC heat spreader 30 is preferably made of stainless steel, and the circulating medium inside it is ammonia.

[0026] In this embodiment, the VC heat spreader 30 includes a first clamp and a second clamp connected in series, such as... Figure 3As shown, the first clamping member covers the outer periphery of the air heater 20, and the second clamping member covers the outer periphery of the waste heat recovery unit 10. In use, the waste heat recovery unit 10 is connected to the evaporation end of the VC heat exchange plate 30 as a heat source. The heat energy diffused by the heat dissipation shell 12 is transferred to the evaporation end of the VC heat exchange plate 30. At this time, the nitrogen medium inside the VC heat exchange plate 30 absorbs heat and evaporates rapidly to form steam. This process absorbs a large amount of heat, thereby carrying away the heat energy on the waste heat recovery unit 10. The steam inside the VC heat exchange plate 30 can quickly diffuse from the high-pressure side to the low-pressure side, i.e., the condensation end. On the low-pressure side, the steam condenses and releases heat. The released heat diffuses through the plate wall of the VC heat exchange plate 30 to the air heater 20. The air heater 20, as a heat dissipation end, can dissipate the heat released by the VC heat exchange plate 30 into the air to heat the air flowing through the heat dissipation cavity 21. It can be seen that the energy-saving structure composed of the VC heat exchange plate 30, the waste heat recovery unit 10, and the air heater 20 is compact, has high heat recovery efficiency, and meets the needs of heat waste gas recovery.

[0027] In a preferred embodiment, the overheating channel 15 is provided with heat dissipation fins 16. These fins 16 are fixed to the inner wall of the heat dissipation shell 12 and have an airflow gap between them and the inner wall of the heat-insulating core 11. The heat dissipation fins 16 can be arranged horizontally, vertically, or spirally relative to the airflow direction. In this embodiment, a horizontal arrangement relative to the airflow direction is preferred. Figure 4-6 As shown, in order to further increase airflow resistance and improve heat exchange efficiency, a spiral arrangement can be used, that is, the heat dissipation fins 16 are spirally arranged on the inner wall of the heat dissipation shell 12. In this embodiment, the heat dissipation fins 16 are used to improve waste heat recovery efficiency on the one hand, and to increase airflow resistance on the other hand, to increase the residence time of hot waste gas in the unidirectional airflow path, and to further achieve sufficient heat exchange.

[0028] As a preferred embodiment, multiple sets of heat dissipation ribs 22 are provided in the heat dissipation cavity 21 of the air heater 20. These multiple sets of heat dissipation ribs 22 are arranged horizontally or spirally relative to the airflow direction, and airflow heating channels are formed between the multiple sets of heat dissipation ribs 22. Figure 5 As shown, it can be understood that the structure and function of the heat dissipation rib 22 should be the same as that of the heat dissipation fin 16 mentioned above, both of which are used to increase heat diffusion efficiency and increase airflow resistance.

[0029] As a preferred embodiment, the air heater 20 further includes a central sleeve 23, which is coaxially arranged with the heat dissipation cavity 21 and forms multiple sets of heat dissipation through holes 24 between the central sleeve 23 and the heat dissipation ribs 22. Airflow can exchange heat through the heat dissipation through holes 24, such as... Figure 5 As shown, compared to the structure that directly sets the heat dissipation ribs 22 in the heat dissipation cavity 21, the advantage of this structure is that it limits the size of the heat dissipation through hole 24 and increases the contact area between air and heat dissipation ribs 22.

[0030] As a preferred embodiment, a dust collection box 18 is provided at the bottom of the heat sink 12. The dust collection box 18 is connected to the bottom of the heat sink 12 via a clamp 19. Figure 1 As shown in Figure 5; since the hot exhaust gas contains particulate impurities, during the airflow process, the impurities in the airflow will settle under the action of gravity. Therefore, the dust collection box 18 can be used to collect the impurities, and they can be cleaned after being disassembled by the clamp 19, which improves the cleanliness and lifespan of the waste heat recovery unit 10 and avoids impurities from blocking the airflow channel and affecting the normal use of the waste heat recovery unit 10.

[0031] As a preferred embodiment, a temperature monitor 17 is provided on the waste heat recovery unit 10. The temperature monitor 17 can monitor the recovered heat energy in real time and provide data for the energy-saving device.

[0032] The specific operating principle of this embodiment includes: Waste heat recovery unit 10 is the waste heat recovery end. When hot waste gas flows in the unidirectional airflow passage, the heat in the hot waste gas is diffused through the heat dissipation shell 12 and the heat dissipation fins 16 set therein. Then, the heat is recovered by heat exchange with the diffused heat energy through the VC heat spreader 30. The recovered hot gas is then transferred to the air heater 20. The air heater 20 serves as the waste heat utilization end. It can use the heat diffused by the heat dissipation fins 22 to heat the ambient air flowing through it, thus realizing the effective recovery and utilization of the heat source in the hot waste gas. In addition, in the waste heat recovery unit 10, particulate impurities in the hot waste gas can be deposited into the dust collection box 18 under the action of gravity. It can be disassembled and cleaned if necessary in the future.

[0033] As can be seen, this embodiment realizes the effective recovery and utilization of thermal energy in hot waste gas based on the principles of thermal diffusion and thermal migration, solves the existing shortcomings, and provides a theoretical basis for the recovery of thermal energy in hot waste gas.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An air waste heat recovery energy-saving device, characterized in that, include: A waste heat recovery unit includes a heat-insulating core and a heat dissipation shell fitted outside the heat-insulating core. The heat-insulating core is a hollow columnar structure with an exhaust port at its upper end. An overheating channel is provided between the heat dissipation shell and the outer periphery and bottom of the heat-insulating core. A hot waste gas inlet communicating with the overheating channel is provided on the heat dissipation shell. The hot waste gas inlet, the overheating channel, the hollow cavity of the heat-insulating core, and the exhaust port together constitute a one-way airflow path. When the hot waste gas flows through the one-way airflow path, it can recover heat energy through the heat dissipation shell. An air heater is connected to the waste heat recovery unit via at least one set of VC heat exchange plates. The VC heat exchange plates can transfer the heat energy recovered by the waste heat recovery unit to the air heater. The air heater includes a heat dissipation cavity that runs vertically through the air heater, which can heat the flowing cold air to meet the needs of downstream equipment.

2. The air waste heat recovery energy-saving device according to claim 1, characterized in that: The overheating channel is provided with heat dissipation fins, which are fixed to the inner wall of the heat dissipation shell and have an airflow gap between them and the inner wall of the heat insulation core. The heat dissipation fins are arranged horizontally, vertically, or spirally relative to the airflow direction.

3. The air waste heat recovery energy-saving device according to claim 1, characterized in that: The VC heat exchanger includes a first clamp and a second clamp connected in series. The first clamp serves as the condensing end and covers the outer periphery of the air heater, while the second clamp serves as the evaporating end and covers the outer periphery of the waste heat recovery unit.

4. The air waste heat recovery energy-saving device according to claim 1, characterized in that: The heat dissipation cavity of the air heater is provided with multiple sets of heat dissipation ribs. These multiple sets of heat dissipation ribs are arranged horizontally or spirally relative to the airflow direction, and the multiple sets of heat dissipation ribs form an airflow heating channel.

5. The air waste heat recovery energy-saving device according to claim 4, characterized in that: The air heater also includes a central sleeve, which is coaxially arranged with the heat dissipation cavity and forms multiple sets of heat dissipation through holes with the heat dissipation ribs, through which airflow can exchange heat.

6. The air waste heat recovery energy-saving device according to claim 1, characterized in that: The bottom of the heat sink is equipped with a dust collection box, which is connected to the bottom of the heat sink by a clamp.

7. The air waste heat recovery energy-saving device according to claim 1, characterized in that: The waste heat recovery unit is equipped with a temperature monitor to monitor the recovered heat energy.

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