Feeding waste heat platform for secondary aluminum production

Abstract

The utility model provides a charging waste heat platform for secondary aluminum production, and relates to the field of secondary aluminum production. The charging waste heat platform for secondary aluminum production comprises a platform body and supporting legs installed at the bottom of the platform body, the charging waste heat platform body comprises a fixed platform body, a fixed cover and a fixed shell, a feeding device used for smashing aluminum raw materials is installed on the fixed shell, and a conveying mechanism is installed in the fixed cover and the fixed shell. Feeding holes are formed in an outer cylinder and a fixed shell of the conveying mechanism; according to the feeding waste heat platform for secondary aluminum production, flue gas is wrapped by the fixing cover and can flow in the specific direction, the heat loss amount in the preheating process is reduced, energy is saved, aluminum raw materials are crushed through the two crushing cutters, the contact area of the aluminum raw materials and air is increased, the subsequent preheating effect is improved, and the service life of the aluminum raw materials is prolonged. And the conveying mechanism can intermittently supply materials and is matched with the inner cylinder and the outer cylinder to rotate, so that the aluminum raw materials continuously roll, the retention time and the heated contact area are increased, and the preheating effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of recycled aluminum production, specifically a waste heat feeding platform for recycled aluminum production. Background Technology

[0002] Recycled aluminum production refers to the process of recycling and processing waste aluminum products or aluminum-containing scrap to produce aluminum and aluminum alloy products that can be used for various purposes. In the process of recycled aluminum production, the recycled aluminum scrap is preheated by the waste heat platform before being added to the furnace. This can raise the temperature of the scrap before it enters the furnace. Because the initial temperature of the aluminum scrap is higher, the time required to reach the melting temperature in the furnace is shortened, thereby speeding up the entire melting process and improving production efficiency.

[0003] Traditional waste heat platforms typically have a square flat plate structure for preheating, consisting of the preheating platform and several supports located below it. They utilize the feeding interval and the waste heat outside the furnace door to preheat the raw materials. However, because traditional waste heat platforms are open-type designs without effective sealing and insulation structures, heat is easily lost to the surrounding environment during the preheating process. This not only results in low waste heat utilization efficiency but also leads to energy waste. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a waste heat platform for feeding recycled aluminum production, which solves the problem that heat is easily lost to the surrounding environment during the preheating process, resulting in low waste heat utilization efficiency and energy waste.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a feeding waste heat platform for recycled aluminum production, including a platform and support legs installed at the bottom of the platform. The feeding waste heat platform includes a fixed platform, a fixed cover, and a fixed shell. A feeding device for crushing aluminum raw materials is installed on the fixed shell. A conveying mechanism is installed inside the fixed cover and the fixed shell. Both the outer cylinder of the conveying mechanism and the fixed shell have inlets. When the outer cylinder rotates, it intermittently feeds material into the conveying mechanism through the inlets. The conveying mechanism transports the crushed aluminum raw materials along the spiral channel inside the conveying mechanism and discharges them from the discharge channel of the conveying mechanism. A hollow cover is fixedly connected to one end of the fixed cover.

[0006] The conveying mechanism is equipped with a screw rod. One end of the hollow cover is rotatably connected to the screw rod. The flue gas generated by the aluminum furnace used for recycled aluminum production is drawn into the fixed shell through the exhaust pipe. The flue gas flows through the fixed shell, the screw rod and the fixed cover in sequence, and is discharged from the exhaust pipe of the fixed cover.

[0007] Preferably, the hollow cover is cone-shaped and its interior is filled with insulating material.

[0008] Preferably, the extraction pipe is connected to the fixed shell, and the extraction pipe draws the flue gas generated during the aluminum production process into the fixed shell through an external extraction pump.

[0009] Preferably, the exhaust pipe is connected to the fixed cover, and a one-way valve is provided inside the exhaust pipe.

[0010] Preferably, the feeding device includes a feeding frame, two rotating rods and two sets of staggered crushing blades. The rotating rods pass through the feeding frame and are rotatably connected to it. The two sets of crushing blades are fixedly connected to the two rotating rods respectively. One end of each of the two rotating rods is fixedly connected to a gear, and the two gears are meshed together.

[0011] Preferably, the conveying mechanism further includes a rotating component, a spiral blade, an inner cylinder, and a baffle. The outer cylinder is rotatably connected to the fixed shell. The rotating component has an internal vent. One end of the rotating component passes through the fixed shell and is rotatably connected to it. A sealing ring is provided at the junction of the two. There is a gap between the other end of the rotating component and the inner wall of the fixed shell. The outermost ring of the rotating component is rotatably connected to the inner ring of the fixed shell. The inner and outer cylinders are concentrically arranged and both are fixedly connected to the rotating component. The spiral blade is located in the annular channel between the inner and outer cylinders. The inner ring of the spiral blade is fixedly connected to the outer ring of the inner cylinder, and the outer ring of the spiral blade is fixedly connected to the inner ring of the outer cylinder. Both the inner and outer cylinders are rotatably connected to the baffle. One end of the discharge channel communicates with the opening in the baffle, and the other end passes through the fixed cover and is fixed to it.

[0012] Preferably, the outer cylinder is rotatably connected to the fixed cover, and an annular sealing gasket is fixedly installed inside the fixed cover, with the outer cylinder and the sealing gasket in sealing contact.

[0013] Preferably, the inner wall of the fixed cover is fixedly connected with a plurality of guide vanes, the guide vanes being ring-shaped and having an inclined cross-section.

[0014] Compared with the prior art, this utility model has the following advantages: the flue gas is enclosed by a fixed hood, and the flue gas can flow in a specific direction, reducing heat loss during preheating and saving energy; the residual heat of the flue gas discharged from the aluminum furnace can heat the inner and outer cylinders when it flows; the flue gas flows spirally along the screw rod, impacting the inner cylinder and increasing the residence time; it contacts the guide plate in the channel between the fixed hood and the outer cylinder, impacting the outer cylinder, reducing the flow velocity, and increasing the residence time, so that the flue gas can fully heat the inner and outer cylinders; the aluminum raw material is crushed by two sets of crushing blades, increasing its contact area with air and improving the subsequent preheating effect; the aluminum raw material is spirally conveyed in the conveying mechanism, increasing the residence time and facilitating full preheating; moreover, the conveying mechanism can feed material intermittently, and in conjunction with the rotation of the inner and outer cylinders, the aluminum raw material is continuously tumbled, increasing the residence time and the heat contact area, thus improving the preheating effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a sectional view of the front view of the fixing platform, fixing cover, and fixing shell of this utility model.

[0017] Figure 3 This is a sectional view of the front view of the fixing cover and fixing shell of this utility model;

[0018] Figure 4 This is a schematic diagram of the screw rod structure of this utility model;

[0019] Figure 5 This is a sectional view of the front view of the feeding device of this utility model;

[0020] Figure 6 This is a schematic diagram of the guide plate structure of this utility model;

[0021] Figure 7 This is a sectional view of the front view of the guide plate of this utility model;

[0022] Figure 8 This is a cross-sectional view of the present invention when the two feed inlets are connected;

[0023] Figure 9 This is a cross-sectional view of the present invention when the two feed inlets are staggered.

[0024] The components are as follows: 1. Fixed platform; 2. Fixed cover; 3. Fixed shell; 4. Feeding device; 401. Feeding frame; 402. Rotating rod; 403. Crusher; 5. Conveying mechanism; 501. Rotating component; 502. Spiral blade; 503. Inner cylinder; 504. Outer cylinder; 505. Baffle; 506. Discharge channel; 6. Feed inlet; 7. Vent; 8. Hollow cover; 9. Spiral rod; 10. Exhaust pipe; 11. Extraction pipe; 12. Guide vane. Detailed Implementation

[0025] like Figures 1-9As shown, a waste heat feeding platform for recycled aluminum production includes a platform and support legs installed at the bottom of the platform. The platform includes a fixed platform 1, a fixed cover 2, and a fixed shell 3. The fixed platform 1 is fixed to the support legs. The fixed cover 2 and the fixed shell 3 are both fixed to the fixed platform 1. Several guide vanes 12 are fixedly connected to the inner wall of the fixed cover 2. The guide vanes 12 are annular in shape and have an inclined cross-section. A feeding device 4 for crushing aluminum raw materials is installed on the fixed shell 3. The feeding device 4 includes a feeding frame 401, two rotating rods 402 for rotation, and two sets of staggered crushing blades 403. The rotating rods 402 pass through the feeding frame 401 and are rotatably connected to the feeding frame 401. The two sets of crushing blades 403 are respectively fixedly connected to the two rotating rods 402. One end of each of the components is fixedly connected to a gear, and the two gears mesh together. The other end of one of the rotating rods 402 is connected to an external motor. When the external motor drives one of the rotating rods 402 to rotate, the meshing of the two gears causes the two rotating rods 402 to rotate in opposite directions, thereby causing the two sets of crushing blades 403 to rotate in opposite directions to crush the aluminum raw material. A conveying mechanism 5 is installed inside the fixed cover 2 and the fixed shell 3. The outer cylinder 504 of the conveying mechanism 5 and the fixed shell 3 are both provided with feed inlets 6. When the outer cylinder 504 rotates, material is intermittently fed into the conveying mechanism 5 through the feed inlets 6. The conveying mechanism 5 also includes a rotating component 501, a spiral blade 502, an inner cylinder 503, and a baffle 505. The outer cylinder 504 is rotatably connected to the fixed shell 3. The interior of component 1 has a vent 7. One end of the rotating component 501 passes through the fixed shell 3 and is rotatably connected to the fixed shell 3. A sealing ring is provided at the junction of the two. There is a gap between the other end of the rotating component 501 and the inner wall of the fixed shell 3. The outermost ring of the rotating component 501 is rotatably connected to the inner ring of the fixed shell 3, and the connection between the two is sealed. The inner cylinder 503 and the outer cylinder 504 are concentrically arranged and are both fixedly connected to the rotating component 501. The spiral blade 502 is located in the annular channel between the inner cylinder 503 and the outer cylinder 504. The inner ring of the spiral blade 502 is fixedly connected to the outer ring of the inner cylinder 503, and the outer ring of the spiral blade 502 is fixedly connected to the inner ring of the outer cylinder 504. Both the inner cylinder 503 and the outer cylinder 504 are rotatably connected to the baffle 505. The discharge channel 5... One end of component 506 is connected to the opening inside the baffle 505, and the other end passes through the fixed cover 2 and is fixed to the fixed cover 2. One end of the rotating component 501 is driven to rotate by an external motor, which in turn causes the spiral blades 502, inner cylinder 503, and outer cylinder 504 to rotate, thus conveying the aluminum raw material. The outer cylinder 504 is rotatably connected to the fixed cover 2. An annular sealing gasket is fixedly installed inside the fixed cover 2, and the outer cylinder 504 is in sealing contact with the sealing gasket to improve the sealing performance between the outer cylinder 504 and the fixed cover 2, preventing flue gas from leaking from the connection between the two and polluting the environment. The conveying mechanism 5 conveys the crushed aluminum raw material along the spiral channel inside the conveying mechanism 5 and discharges it from the discharge channel 506 of the conveying mechanism 5. A hollow cover 8 is fixedly connected to one end of the fixed cover 2. The hollow cover 8 is conical in shape.Its interior is filled with insulation material, such as rock wool, which has thermal insulation and fireproof properties, and is relatively inexpensive. When smoke impacts the hollow hood, it can reduce heat loss from the smoke.

[0026] The conveying mechanism 5 is equipped with a screw rod 9. One end of the hollow cover 8 is rotatably connected to the screw rod 9. The flue gas generated by the aluminum furnace used for recycled aluminum production is drawn into the fixed shell 3 through the exhaust pipe 11. The exhaust pipe 11 is connected to the fixed shell 3. The exhaust pipe 11 draws the flue gas generated during the aluminum production process into the fixed shell 3 through an external exhaust pump. The flue gas flows through the fixed shell 3, the screw rod 9 and the fixed cover 2 in sequence, and is discharged from the exhaust pipe 10 of the fixed cover 2. The exhaust pipe 10 is connected to the fixed cover 2 and is equipped with a one-way valve.

[0027] In use, first connect the exhaust pipe 11 to an external exhaust pump. The exhaust pump draws the flue gas from the aluminum furnace used for recycled aluminum production into the exhaust pipe 11. The flue gas in the exhaust pipe 11 enters the space between the fixed shell 3 and the rotating part 501. Then, the flue gas enters the interior of the inner cylinder 503 through the vent 7 in the rotating part 501. The flue gas flows along the spiral blades of the screw rod 9 towards the hollow hood 8. Part of the flue gas enters the fixed hood 2 along the inclined surface of the hollow hood 8, and another part of the flue gas enters the fixed hood 2 directly. Finally, the flue gas will be stored between the fixed hood 2 and the outer cylinder 504. The gas flows within the channel. When the air pressure inside the fixed cover 2 exceeds a predetermined value, the one-way valve in the exhaust pipe 10 opens, and the flue gas is discharged from the exhaust pipe 10. It should be noted that the exhaust pipe 10 can be connected to an external device for treating flue gas to purify the flue gas. Through the baffle 505, when the flue gas is discharged from one end of the inner cylinder 503, the baffle 505 can block the flue gas and prevent the flue gas from entering the spiral channel between the outer cylinder 504 and the inner cylinder 503 used for conveying aluminum raw materials. This is because the flue gas contains impurities, preventing the flue gas from directly contacting the aluminum raw materials and causing aluminum raw material contamination.

[0028] Subsequently, due to the high temperature of the flue gas discharged from the aluminum furnace, as the flue gas flows along the inner cylinder 503 and the fixed hood 2, the residual heat of the flue gas can heat both the inner cylinder 503 and the outer cylinder 504. Furthermore, as the flue gas flows along the spiral blades of the screw rod 9, it can flow in a spiral manner towards the inner ring of the inner cylinder 503. This not only allows some of the flue gas to impact the inner cylinder 503 but also increases the residence time of the flue gas within the inner cylinder 503. Additionally, the flue gas flows between the fixed hood 2 and the outer cylinder... When the flue gas flows within the channel between 504, it comes into contact with multiple guide plates and approaches the outer ring of the outer cylinder 504 along the slope of the guide plates. This also allows some of the flue gas to impact the outer cylinder 504. Furthermore, the guide plates can block some of the flue gas, reduce the flow rate of the flue gas, and increase the residence time of the flue gas on the outside of the outer cylinder 504. This allows the flue gas to fully heat the inner cylinder 503 and the outer cylinder 504, thereby improving the heating effect of the flue gas on the inner cylinder 503 and the outer cylinder 504 and increasing the utilization rate of the flue gas waste heat.

[0029] Next, aluminum raw material is fed into the feed frame 401 and falls onto the two sets of crushing blades 403. When one of the rotating rods 402 is driven to rotate by an external motor, the meshing of two gears causes the two rotating rods 402 to rotate in opposite directions. The two rotating rods 402 drive the two sets of crushing blades 403 to rotate in opposite directions, causing the two sets of crushing blades 403 to crush the aluminum raw material. The increased contact area between the crushed aluminum raw material and the air is beneficial for improving the subsequent preheating effect. Then, the crushed aluminum raw material falls to the bottom of the feed frame 401 and enters the feed inlet 6 inside the fixed shell 3. One end of the rotating component 501 is connected to an external motor, which drives the rotating component 501 to rotate. The rotating component 501 drives the inner cylinder 503, the outer cylinder 504, and the spiral blades 502 to rotate. Figure 8 As shown, when the feed inlet 6 inside the outer cylinder 504 rotates to the position corresponding to the feed, the two feed inlets 6 are in a connected state. The feed inlet 6 inside the fixed shell 3 discharges the crushed aluminum raw material to the feed inlet 6 inside the outer cylinder 504. Then, the aluminum raw material enters the spiral channel between the outer cylinder 504 and the inner cylinder 503 through the feed inlet 6. As the outer cylinder 504 and the inner cylinder 503 rotate, the spiral blades 502 can transport the aluminum raw material towards the discharge channel 506. The aluminum raw material passes through the opening in the baffle 505 and is discharged from the discharge channel 506. The discharged aluminum raw material can be used to feed into the aluminum furnace for recycled aluminum production. Since the aluminum raw material is transported in a spiral manner in the conveying mechanism 5, the residence time of the aluminum raw material can be increased, which is beneficial to its full preheating. Figure 9As shown, when the feed inlet 6 inside the outer cylinder 504 rotates to a position offset from the feed position, the outer ring of the outer cylinder 504 blocks the feed inlet 6 of the fixed shell 3. At this time, the feeding stops. When the feed inlet 6 inside the outer cylinder 504 rotates to the position corresponding to the feed position again, the feeding starts again, thus achieving the purpose of intermittent feeding. This is because the crushed aluminum raw materials may pile up together, reducing the heating area. Through intermittent feeding, in conjunction with the rotation of the inner cylinder 503 and the outer cylinder 504, the aluminum raw material particles can be continuously tumbled, which not only increases the residence time of the aluminum raw materials, but also further increases the heating contact area of ​​the aluminum raw materials, thereby improving the preheating effect. It should be noted that, since the flue gas flows in a specific direction, that is, it passes sequentially through the exhaust pipe 11, the space between the fixed shell 3 and the rotating part 501, the vent 7 in the rotating part 501, the spiral rod 9 in the inner cylinder 503, the fixed cover 2 and the exhaust pipe 10, the heat loss during the preheating process is reduced, thus saving energy. It should also be noted that, since the aluminum raw material has been crushed before being put into the aluminum melting furnace, the contact area of ​​the aluminum raw material in the aluminum melting furnace can be increased, which is beneficial to heating and melting the aluminum raw material and reducing the workload of the aluminum melting furnace.

[0030] 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 feeding platform for recycled aluminum production, comprising a platform and support legs installed at the bottom of the platform, characterized in that: The feeding waste heat platform includes a fixed platform (1), a fixed cover (2) and a fixed shell (3). A feeding device (4) for crushing aluminum raw materials is installed on the fixed shell (3). A conveying mechanism (5) is installed inside the fixed cover (2) and the fixed shell (3). A feed port (6) is opened in the outer cylinder (504) of the conveying mechanism (5) and the fixed shell (3). When the outer cylinder (504) rotates, it feeds material intermittently into the conveying mechanism (5) through the feed port (6). The conveying mechanism (5) conveys the crushed aluminum raw materials along the spiral channel inside the conveying mechanism (5) and discharges them from the discharge channel (506) of the conveying mechanism (5). A hollow cover (8) is fixedly connected to one end of the fixed cover (2). A screw rod (9) is installed inside the conveying mechanism (5). One end of the hollow cover (8) is rotatably connected to the screw rod (9). The flue gas generated by the aluminum furnace used for recycled aluminum production is drawn into the fixed shell (3) through the exhaust pipe (11). The flue gas flows through the fixed shell (3), the screw rod (9) and the fixed cover (2) in sequence, and is discharged from the exhaust pipe (10) of the fixed cover (2).

2. The waste heat feeding platform for recycled aluminum production according to claim 1, characterized in that: The hollow cover (8) is cone-shaped and its interior is filled with thermal insulation material.

3. The waste heat feeding platform for recycled aluminum production according to claim 1, characterized in that: The extraction pipe (11) is connected to the fixed shell (3), and the extraction pipe (11) draws the flue gas generated during the aluminum production process into the fixed shell (3) through an external extraction pump.

4. The waste heat feeding platform for recycled aluminum production according to claim 1, characterized in that: The exhaust pipe (10) is connected to the fixed cover (2), and a one-way valve is provided inside the exhaust pipe (10).

5. The waste heat feeding platform for recycled aluminum production according to claim 1, characterized in that: The feeding device (4) includes a feeding frame (401), two rotating rods (402) for rotation, and two sets of staggered crushing blades (403). The rotating rods (402) pass through the feeding frame (401) and are rotatably connected to the feeding frame (401). The two sets of crushing blades (403) are fixedly connected to the two rotating rods (402) respectively. One end of each of the two rotating rods (402) is fixedly connected to a gear, and the two gears are meshed together.

6. The waste heat feeding platform for recycled aluminum production according to claim 1, characterized in that: The conveying mechanism (5) further includes a rotating component (501), a spiral blade (502), an inner cylinder (503), and a baffle (505). The outer cylinder (504) is rotatably connected to the fixed shell (3). A vent (7) is provided inside the rotating component (501). One end of the rotating component (501) passes through the fixed shell (3) and is rotatably connected to it. A sealing ring is provided at the junction of the two. There is a gap between the other end of the rotating component (501) and the inner wall of the fixed shell (3). The outermost ring of the rotating component (501) is rotatably connected to the inner ring of the fixed shell (3). The inner cylinder (503) The inner cylinder (503) and outer cylinder (504) are concentrically arranged and both are fixedly connected to the rotating part (501). The spiral blade (502) is located in the annular channel between the inner cylinder (503) and outer cylinder (504). The inner ring of the spiral blade (502) is fixedly connected to the outer ring of the inner cylinder (503), and the outer ring of the spiral blade (502) is fixedly connected to the inner ring of the outer cylinder (504). Both the inner cylinder (503) and outer cylinder (504) are rotatably connected to the baffle (505). One end of the discharge channel (506) is connected to the opening in the baffle (505), and the other end passes through the fixed cover (2) and is fixed to the fixed cover (2).

7. The waste heat feeding platform for recycled aluminum production according to claim 6, characterized in that: The outer cylinder (504) is rotatably connected to the fixed cover (2), and an annular sealing gasket is fixedly installed inside the fixed cover (2), with the outer cylinder (504) in sealing contact with the sealing gasket.

8. The waste heat feeding platform for recycled aluminum production according to claim 1, characterized in that: The inner wall of the fixed cover (2) is fixedly connected with several guide vanes (12), which are ring-shaped and have an inclined cross-section.

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