Integrated combustion-supporting exhaust fan assembly

Abstract

This utility model provides an integrated combustion-supporting and smoke-exhausting fan assembly, which connects the combustion-supporting fan and the smoke-exhausting fan to multiple ducts via a first main pipe and a second main pipe, enabling switching between air supply and smoke exhaust processes. The combustion-supporting fan, the smoke-exhausting fan, the first main pipe, and the second main pipe are integrated on the assembly bracket, which disperses stress and reduces the vibration generated by the combustion-supporting fan and the smoke-exhausting fan. The entire fan assembly is assembled as a complete unit before leaving the factory, and after adjustment, the whole unit is installed on the field equipment, making the entire assembly modular, rigid, and pre-calibrated. Compared with the field assembly in the prior art, it can improve installation reliability and reduce installation and maintenance costs.

Description

Technical Field

[0001] This utility model relates to an aluminum melting device, specifically an integrated combustion-supporting smoke exhaust fan assembly. Background Technology

[0002] Regenerative thermal combustion (RTC) systems are a common combustion technology in aluminum smelting processes. Their principle involves recovering waste heat from flue gas through a regenerator, using this waste heat to preheat the combustion gases, thus improving thermal efficiency while reducing fuel consumption and emissions. This results in significant energy savings, and in recent years, almost all aluminum smelting furnaces have adopted RTC technology. A complete RTC system typically includes various components such as combustion fans, exhaust fans, reversing valve assemblies, and regulating valve assemblies. These components are relatively large, and traditionally, they are delivered to the installation site and then assembled into the pipeline according to the drawings to meet the piping requirements. However, due to significant differences in the structure of furnace equipment and the varying space and conditions at the construction site, this on-site assembly method results in dispersed installation of fans and reversing valves, occupying considerable space, hindering equipment maintenance, and significantly increasing the workload at the installation site. The installation results also vary considerably, posing a significant challenge to equipment standardization. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides an integrated combustion-supporting and smoke-exhausting fan assembly, including an assembly bracket, a duct group, a combustion-supporting fan, and a smoke-exhausting fan. The combustion-supporting fan and the smoke-exhausting fan are fixedly connected to the assembly bracket. The air outlet of the combustion-supporting fan is connected to the first main pipe through a first pipe, and the air inlet of the smoke-exhausting fan is connected to the second main pipe through a second pipe. The first main pipe and the second main pipe are arranged side by side vertically and fixedly connected to the assembly bracket. The duct group consists of at least two sets of ducts arranged horizontally. Each set of ducts is connected to the first main pipe and the second main pipe respectively through two reversing pipes. Each reversing pipe is equipped with a pneumatic reversing valve.

[0004] Furthermore, the assembly bracket includes a base plate and a vertically extending frame from the base plate, with the combustion fan and exhaust fan fixedly connected to the base plate, and the bottom of the base plate having connection holes.

[0005] Furthermore, the surface of the support frame extends with horizontally arranged support plates, and the first main pipe and the second main pipe are respectively connected to a set of support plates.

[0006] Furthermore, the first and second main pipes are connected to their corresponding support plates via pipe clamps.

[0007] Furthermore, reinforcing ribs are provided between the upright frame and the base plate.

[0008] Furthermore, each duct is equipped with an upwind vent and a downwind vent.

[0009] Furthermore, shock-absorbing pads are provided between the bottom of the combustion fan and the exhaust fan and the assembly bracket.

[0010] Furthermore, corrugated pipe compensators are connected between the outlet of the combustion-supporting fan and the first main pipe, and between the smoke exhaust fan and the second main pipe.

[0011] This utility model provides an integrated combustion-supporting and smoke-exhausting fan assembly, which connects the combustion-supporting fan and the smoke-exhausting fan to multiple ducts via a first main pipe and a second main pipe, enabling switching between air supply and smoke exhaust processes. The combustion-supporting fan, the smoke-exhausting fan, the first main pipe, and the second main pipe are integrated on the assembly bracket, which disperses stress and reduces the vibration generated by the combustion-supporting fan and the smoke-exhausting fan. The entire fan assembly is assembled as a complete unit before leaving the factory, and after adjustment, the whole unit is installed on the field equipment, making the entire assembly modular, rigid, and pre-calibrated. Compared with the field assembly in the prior art, it can improve installation reliability and reduce installation and maintenance costs. Attached Figure Description

[0012] Figure 1 This is a front view of the integrated combustion-supporting smoke exhaust fan assembly of this utility model;

[0013] Figure 2 yes Figure 1 The left view;

[0014] Figure 3 yes Figure 1 Top view.

[0015] Attached reference numerals: 1. Assembly bracket; 2. Duct; 3. Combustion fan; 4. Exhaust fan; 5. First pipe; 6. Second pipe; 7. First main pipe; 8. Second main pipe; 9. Pneumatic reversing valve; 10. Base plate; 11. Connection hole; 12. Stand; 13. Support plate; 14. Upper air outlet; 15. Lower air outlet; 16. Vibration damping pad; 17. Pipe compensator; 18. Pipe clamp; 19. Reinforcing rib; 20. Reversing pipe. Detailed Implementation

[0016] like Figures 1 to 3 The integrated combustion-supporting and smoke-exhausting fan assembly shown includes an assembly bracket 1, a duct assembly, a combustion-supporting fan 3, and a smoke-exhausting fan 4. The combustion-supporting fan 3 and the smoke-exhausting fan 4 are fixedly connected to the assembly bracket 1. The air outlet of the combustion-supporting fan 3 is connected to the first main pipe 7 through the first pipe 5, and the air inlet of the smoke-exhausting fan 4 is connected to the second main pipe 8 through the second pipe 6. The first main pipe 7 and the second main pipe 8 are arranged side by side and connected to the assembly bracket 1 through a pipe clamp 18.

[0017] The duct assembly consists of at least two sets of ducts 2, with multiple sets of ducts 2 arranged horizontally. Each set of ducts 2 is connected to the first main pipe 7 and the second main pipe 8 through two reversing pipes 20. Each reversing pipe 20 is equipped with a pneumatic reversing valve 9, which dynamically controls the airflow by opening and closing the valve.

[0018] Specifically, the assembly bracket 1 includes a base plate 10 and a vertically extending frame 12 from the base plate 10. The base plate 10 is used to accommodate the combustion fan 3 and the exhaust fan 4. The bottom of the base plate 10 is provided with a connection hole 11 for installing the assembly bracket 1 as a whole onto the target equipment. A horizontally arranged support plate 13 extends from the surface of the frame 12. The first main pipe 7 and the second main pipe 8 are respectively connected to a set of support plates 13. When installing the pipes, the first main pipe 7 and the second main pipe 8 are placed flat on the surface of the support plate 13 to stabilize their positions. Then, the air outlets of the two fans are connected to the corresponding main pipes, and the two main pipes are connected to each air duct 2 to complete the modular assembly of the entire assembly.

[0019] Furthermore, a reinforcing rib 19 is provided between the upright frame 12 and the base plate 10 to enhance the stability of the upright frame 12.

[0020] Combustion fan 3 and exhaust fan 4 represent two modes of the combustion system. Combustion fan 3 supplies combustion gas to the combustion system; upon startup, the combustion gas is transported to each duct 2 via the first main pipe 7. Exhaust fan 4 discharges combustion exhaust gas; upon startup, exhaust gas from the furnace is discharged via the second main pipe 8 and exhaust fan 4. The duct assembly connects the first main pipe 7, the second main pipe 8, and the furnace. The combustion gas is preheated by the heat storage medium after passing through the duct assembly, and the exhaust gas after combustion exchanges heat with the heat storage medium before being discharged via each duct 2 and then by exhaust fan 4. A pneumatic reversing valve 9 installed on each reversing duct 20 can quickly switch the airflow path, allowing the same set of ducts 2 to switch between combustion mode and exhaust mode.

[0021] The number of ducts 2 is set to at least two sets, with multiple sets of ducts 2 arranged side by side. When some of the ducts 2 are supplying air, the remaining ducts 2 are used for smoke exhaust. For example, in this embodiment, the number of ducts 2 is set to three sets, with one set of ducts 2 supplying air and the remaining two sets exhausting smoke.

[0022] Each air duct 2 is equipped with an upper air inlet 14 and a lower air inlet 15. The dual-air-inlet design allows for the creation of different airflow paths by adjusting the airflow ratio of the upper and lower air inlets 15, thus preventing flame concentration within the combustion furnace. Furthermore, when one air inlet is blocked, the other air inlet can continue to operate, thereby improving the stability of the combustion system.

[0023] Furthermore, the bottom of the combustion fan 3 and the smoke exhaust fan 4 and the assembly support 1 are provided with shock-absorbing pads 16, so that the shock-absorbing pads 16 can provide buffer for the fans, reduce the vibration generated by the fans, and thus ensure the flow of air in combustion mode and smoke exhaust mode.

[0024] Furthermore, corrugated pipe compensators 17 are connected between the outlet of the combustion fan 3 and the first main pipe 7, and between the exhaust fan 4 and the second main pipe 8. When the combustion system is running, the first main pipe 7 and the second main pipe 8 will experience axial and radial thermal expansion, while the fan casing temperature is relatively low, making it easy for thermal displacement differences to occur between the fan and the corresponding main pipe. The pipe compensator 17 can absorb the thermal expansion difference between the main pipe and the fan through its own elastic deformation, reducing the mechanical impact caused by the rigid connection between the motor and the main pipe.

[0025] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An integrated combustion air exhaust fan assembly, characterized by: The assembly includes an assembly bracket (1), a duct assembly, a combustion fan (3), and a smoke exhaust fan (4). The combustion fan (3) and the smoke exhaust fan (4) are fixedly connected to the assembly bracket (1). The outlet of the combustion fan (3) is connected to the first main pipe (7) through the first pipe (5), and the inlet of the smoke exhaust fan (4) is connected to the second main pipe (8) through the second pipe (6). The first main pipe (7) and the second main pipe (8) are arranged side by side and fixedly connected to the assembly bracket (1). The duct assembly consists of at least two sets of ducts (2) arranged horizontally. Each set of ducts (2) is connected to the first main pipe (7) and the second main pipe (8) through two reversing pipes (20). Each reversing pipe (20) is equipped with a pneumatic reversing valve (9).

2. The integrated combustion-air exhaust fan assembly of claim 1, wherein: The assembly bracket (1) includes a base plate (10) and a vertical frame (12) extending vertically from the base plate (10). The combustion fan (3) and the exhaust fan (4) are fixedly connected to the base plate (10). The bottom of the base plate (10) is provided with a connection hole (11).

3. The integrated combustion-supporting smoke exhaust fan assembly as described in claim 2, characterized in that: The surface of the stand (12) extends with a horizontally arranged support plate (13), and the first main pipe (7) and the second main pipe (8) are respectively connected to a set of support plates (13).

4. The integrated combustion-air exhaust fan assembly of claim 3, wherein: The first main pipe (7) and the second main pipe (8) are connected to their corresponding support plates (13) by pipe clamps (18).

5. The integrated combustion-air exhaust fan assembly of claim 2, wherein: A reinforcing rib (19) is provided between the upright frame (12) and the base plate (10).

6. The integrated combustion-air exhaust fan assembly of claim 1, wherein: Each duct (2) is equipped with an upper air outlet (14) and a lower air outlet (15).

7. The integrated combustion-air exhaust fan assembly of claim 1, wherein: A shock-absorbing pad (16) is provided between the bottom of the combustion fan (3) and the exhaust fan (4) and the assembly bracket (1).

8. The integrated combustion-air exhaust fan assembly of claim 1, wherein: The outlet of the combustion fan (3) is connected to the first main pipe (7), and the exhaust fan (4) is connected to the second main pipe (8) with a corrugated pipe compensator (17).

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