Aeration fan waste heat recovery device
Patent Information
- Application Number
- CN202522135944.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-10
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-10-10
AI Technical Summary
[0010]本实用新型提供了一种曝气风机余热回收装置。具备以下有益效果：该曝气风机余热回收装置，在曝气管道与罗茨曝气风机本体的出风端之间装配连接有两个并列设置的换热仓，一备一用，可根据实际作业工况进行切换，有效保证针对罗茨曝气风机本体出风余热的换热回收效率；换热仓内设置有组合式换热组件，通过组合式换热组件中的冷媒（水体）与高温风流之间进行热交换，从而提升冷媒（水体）温度，高温水体达到预设温度后经返液管注入到锅炉补水罐内，供锅炉使用，可大大降低锅炉加热能耗，实现能源梯级利用；此外，有效降低了罗茨曝气风机本体出风口位置温度，可有效减少热膨胀对风机内部精密部件（如转子、轴承）的影响，降低因高温导致的机械变形风险，从而延长设备使用寿命。
Smart Images
Figure CN224650381U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste heat recovery technology for aeration blowers, specifically to a waste heat recovery device for aeration blowers. Background Technology
[0002] The aeration blowers used in wastewater treatment are mainly used to supply oxygen to microorganisms in the biological contact oxidation process of environmental water treatment. A key feature is the installation of packing material within the tank; bottom aeration oxygenates the wastewater and keeps the wastewater in a flowing state, ensuring sufficient contact between the wastewater and the submerged packing material, thus avoiding the uneven contact defects common in biological contact oxidation tanks. Roots aerators cause a significant increase in outlet temperature through forced air compression, typically 60–90℃ under normal operating conditions, and potentially exceeding 100℃ under high-pressure conditions. This high-temperature airflow contains a large amount of recoverable heat energy, whose recycling has significant economic and environmental value. Therefore, this project was developed to address these issues in depth. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a waste heat recovery device for aeration blowers, which solves the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery device for an aeration blower, comprising a Roots aeration blower body and an aeration pipe disposed on one side of the air outlet end of the Roots aeration blower body. Two parallel heat exchange chambers are assembled and connected between the aeration pipe and the air outlet end of the Roots aeration blower body. A combined heat exchange component is disposed within each heat exchange chamber, with both ends of the combined heat exchange component extending outwards from the outside of the heat exchange chamber. The inlet end of the combined heat exchange component is connected to the outlet end of a liquid supply pump, and the outlet end of the combined heat exchange component is connected to a boiler feedwater tank via a return liquid pipe. A temperature sensor and a one-way valve are disposed on the return liquid pipe. An inspection door is provided at the top of the heat exchange chamber, and an ash discharge door is provided at the bottom of the heat exchange chamber.
[0005] The aforementioned combined heat exchange assembly includes baffles, a support, a spiral heat exchange tube, and heat exchange fins. The baffles are staggered in the heat exchange chamber along an inclined direction. The support is disposed between the baffles. The spiral heat exchange tube is disposed on the support. The heat exchange fins are welded to the side wall of the spiral heat exchange tube.
[0006] One end of the spiral heat exchanger tube is connected to the outlet end of the liquid supply pump via an inlet pipe, and the other end is connected to the return pipe via an outlet pipe.
[0007] Both ends of the heat exchange chamber are equipped with shut-off valves.
[0008] The two ends of the heat exchange chamber are respectively connected to Y-type air guide joints for connecting the Roots aerator body and the aeration pipe.
[0009] The heat exchange chamber is fitted with an insulated shell on the outside.
[0010] This utility model provides a waste heat recovery device for an aeration blower. It offers the following advantages: The device has two parallel heat exchange chambers connected between the aeration pipe and the outlet of the Roots aeration blower body. One chamber is for standby use, and the two can be switched according to actual operating conditions, effectively ensuring efficient heat exchange and recovery of waste heat from the Roots aeration blower body. The heat exchange chambers are equipped with combined heat exchange components. Heat exchange occurs between the refrigerant (water) in the combined heat exchange components and the high-temperature airflow, thereby increasing the temperature of the refrigerant (water). Once the high-temperature water reaches a preset temperature, it is injected into the boiler feedwater tank through a return pipe for boiler use, significantly reducing boiler heating energy consumption and achieving cascaded energy utilization. Furthermore, it effectively reduces the temperature at the outlet of the Roots aeration blower body, effectively reducing the impact of thermal expansion on precision components inside the blower (such as rotors and bearings), reducing the risk of mechanical deformation due to high temperatures, and thus extending the equipment's service life. Attached Figure Description
[0011] Figure 1 This is a top view of the waste heat recovery device for an aeration blower described in this utility model.
[0012] Figure 2 This utility model Figure 1 A partially enlarged structural diagram.
[0013] Figure 3 This utility model Figure 2 A schematic diagram of the front view cross-section structure.
[0014] Figure 4 This is a side view cross-sectional structural diagram of the heat exchange chamber described in this utility model.
[0015] In the diagram: 1. Roots aerator blower body; 2. Aeration pipe; 3. Heat exchange chamber; 4. Liquid supply pump; 5. Return pipe; 6. Temperature sensor; 7. Check valve; 8. Inspection door; 9. Ash discharge door; 10. Baffle; 11. Support; 12. Spiral heat exchange tube; 13. Heat exchange fins; 14. Inlet pipe; 15. Outlet pipe; 16. Shut-off valve; 17. Y-type air guide joint; 18. Thermal insulation shell. Detailed Implementation
[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0017] Example: Refer to the appendix of the instruction manual Figure 1-4 As can be seen, this application specifically designs a waste heat recovery device for an aeration blower, including a Roots aeration blower body 1 and an aeration pipe 2 disposed on one side of the air outlet end of the Roots aeration blower body 1. Two parallel heat exchange chambers 3 are assembled and connected between the aeration pipe 2 and the air outlet end of the Roots aeration blower body 1. Y-type air guide joints 17 are respectively connected to both ends of the heat exchange chambers 3 for connecting the Roots aeration blower body 1 and the aeration pipe 2. Both ends of the heat exchange chambers 3 are provided with shut-off valves 16. A combined heat exchange component is disposed inside the heat exchange chambers 3, and both ends of the combined heat exchange component extend out of the heat exchange chambers 3. On the side, the inlet end of the combined heat exchange component is connected to the outlet end of the liquid supply pump 4. The outlet end of the combined heat exchange component is connected to the boiler feedwater tank through the return pipe 5. The return pipe 5 is equipped with a temperature sensor 6 and a one-way valve 7. The top of the heat exchange chamber 3 is equipped with an inspection door 8, and the bottom of the heat exchange chamber 3 is equipped with an ash discharge door 9. Two parallel heat exchange chambers 3 are assembled and connected between the aeration pipe 2 and the air outlet end of the Roots aerator body 1, one for standby and one for use, which can be switched according to the actual working conditions to effectively ensure the heat exchange and recovery efficiency of the waste heat from the air outlet of the Roots aerator body 1. The heat exchange chamber 3 is equipped with a set of The combined heat exchanger unit exchanges heat with the high-temperature airflow through the refrigerant (water) within the combined heat exchanger unit, thereby increasing the temperature of the refrigerant (water). Temperature sensor 6 monitors the water temperature and adjusts the refrigerant (water) flow rate in real time to ensure full utilization of waste heat. Once the high-temperature water reaches the preset temperature, it is injected into the boiler feedwater tank through return pipe 5 for boiler use, significantly reducing boiler heating energy consumption and achieving energy cascade utilization. Furthermore, it effectively reduces the temperature at the outlet of the Roots aerator blower body 1, effectively minimizing the impact of thermal expansion on precision components inside the blower (such as the rotor and bearings). This reduces the risk of mechanical deformation caused by high temperatures, thereby extending the service life of the equipment. After a period of use, it is necessary to clean the inside of the heat exchange chamber 3. This can be done by closing the shut-off valves 16 at both ends of the current heat exchange chamber 3 and simultaneously opening the shut-off valves 16 at both ends of the bypass heat exchange chamber 3. Open the inspection door 8 and the ash discharge door 9 on the current heat exchange chamber 3, and extend the pneumatic cleaning equipment pipeline into the heat exchange chamber 3. The combined heat exchange components and the inner wall of the heat exchange chamber 3 are cleaned by pneumatic blowing. The cleaned dust is discharged through the lower ash discharge door 9. The structure is simple and easy to operate, which can effectively reduce the difficulty of maintenance.
[0018] In the specific implementation process, the above-mentioned combined heat exchange assembly includes baffles 10, supports 11, spiral heat exchange tubes 12, and heat exchange fins 13. The baffles 10 are staggered in the heat exchange chamber 3 along the inclined direction. The supports 11 are arranged between the baffles 10. The spiral heat exchange tubes 12 are arranged on the supports 11. The heat exchange fins 13 are welded to the side wall of the spiral heat exchange tubes 12. The supports 11 provide support for the spiral heat exchange tubes 12. The design of the heat exchange fins 13 can further increase the heat exchange contact area between the spiral heat exchange tubes 12 and the hot air, thereby improving the heat exchange efficiency. The baffles 10 can effectively extend the residence time of high-temperature gas in the heat exchange chamber 3, further improving the heat exchange efficiency and the recovery rate of waste heat.
[0019] In the specific implementation process, one end of the spiral heat exchange tube 12 is connected to the outlet end of the liquid supply pump 4 through the water inlet pipe 14, and the other end is connected to the return liquid pipe 5 through the water outlet pipe 15. The spiral heat exchange tube 12 is preferably a copper spiral tube, and is connected to the external water supply and drainage pipelines through the water inlet pipe 14 and the water outlet pipe 15 respectively.
[0020] In the specific implementation process, the heat exchange chamber 3 is fitted with a heat insulation shell 18 on the outside. The heat insulation shell 18 is made of high-quality heat insulation cotton, which can effectively prevent heat loss in the heat exchange chamber 3 and further improve the waste heat recovery efficiency.
[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A waste heat recovery device for an aeration blower, comprising a Roots aeration blower body and an aeration pipe disposed on one side of the air outlet end of the Roots aeration blower body, characterized in that, Two parallel heat exchange chambers are assembled and connected between the aeration pipe and the air outlet of the Roots aerator body. A combined heat exchange component is installed in the heat exchange chamber. Both ends of the combined heat exchange component extend to the outside of the heat exchange chamber. The inlet end of the combined heat exchange component is connected to the outlet end of the liquid supply pump. The outlet end of the combined heat exchange component is connected to the boiler feedwater tank through a return liquid pipe. A temperature sensor and a one-way valve are installed on the return liquid pipe. An inspection door is provided at the top of the heat exchange chamber, and an ash discharge door is provided at the bottom of the heat exchange chamber.
2. The waste heat recovery device for an aeration blower according to claim 1, characterized in that, The combined heat exchange assembly includes baffles, a support, a spiral heat exchange tube, and heat exchange fins. The baffles are staggered in the heat exchange chamber along an inclined direction. The support is disposed between the baffles. The spiral heat exchange tube is disposed on the support. The heat exchange fins are welded to the side wall of the spiral heat exchange tube.
3. The waste heat recovery device for an aeration blower according to claim 2, characterized in that, One end of the spiral heat exchange tube is connected to the outlet end of the liquid supply pump through the water inlet pipe, and the other end is connected to the return liquid pipe through the water outlet pipe.
4. The waste heat recovery device for an aeration blower according to claim 1, characterized in that, Both ends of the heat exchange chamber are equipped with shut-off valves.
5. The waste heat recovery device for an aeration blower according to claim 1, characterized in that, Y-type air guide joints are installed at both ends of the heat exchange chamber to connect the Roots aerator body and the aeration pipe.
6. The waste heat recovery device for an aeration blower according to claim 1, characterized in that, The heat exchange chamber is fitted with a heat-insulating shell on its outer side.