Aluminum furnace waste gas waste heat recovery device

Abstract

The utility model discloses an aluminum furnace waste gas waste heat recovery device, which relates to the technical field of aluminum furnace waste heat recovery, and comprises a smelting furnace body, a waste gas pipe, a recovery bin, a waste heat recovery component and a filtering structure, the waste heat recovery assembly is arranged in the recovery bin and comprises a spiral plate, a gas circulation structure and a water circulation structure, the spiral plate divides the recovery bin into a spiral channel, the spiral plate is connected with the water circulation structure in a matched mode, and the filtering structure is matched with the waste gas pipe and the exhaust pipe. Due to the fact that the spiral plate and the water circulation structure are arranged in a matched mode, waste gas can fully exchange heat with cold water in the spiral pipe, the purpose of waste heat recovery is achieved, foreign matter and peculiar smell in the waste gas are filtered through the matched effect of the filter screen and the activated carbon filter screen, and harmful substances are prevented from harming air quality.

Description

Technical Field

[0001] The utility model belongs to the field of aluminum furnace waste heat recovery, and specifically relates to an aluminum furnace waste gas waste heat recovery device. Background Art

[0002] Aluminum furnace is an important equipment for the production of aluminum products. It is mainly used for smelting and casting aluminum alloys. The working principle of aluminum furnace is to heat the solid aluminum material to the melting point, and melt the aluminum material through the heat energy provided by the burner to form aluminum liquid, which can then be cast, poured and other subsequent processes to manufacture various aluminum products.

[0003] In the prior art, aluminum materials are smelted using an aluminum melting furnace. The aluminum materials are placed in the aluminum melting furnace, and the aluminum melting furnace melts the aluminum materials by heating them. Exhaust gas generated by the operation of the aluminum melting furnace is discharged from the aluminum melting furnace, thereby achieving the effect of the aluminum melting furnace melting the aluminum materials.

[0004] However, the exhaust gas generated by the aluminum melting furnace carries a large amount of heat. Direct discharge will cause the heat to be lost along with the exhaust gas, resulting in energy waste. In addition, the exhaust gas discharged from the aluminum melting furnace contains a large amount of harmful substances, and direct discharge can easily cause harm to the air quality. Utility Model Content

[0005] The utility model aims to provide an aluminum furnace exhaust gas waste heat recovery device to solve the technical problem of heat loss in the exhaust gas of the aluminum melting furnace in the prior art.

[0006] The technical problem to be solved by the utility model can be achieved through the following technical solutions:

[0007] An aluminum furnace waste gas waste heat recovery device comprises a furnace body, an exhaust pipe, and a recovery bin, wherein one end of the exhaust pipe is connected to the furnace body, and the other end is connected to the recovery bin, and the end of the recovery bin away from the exhaust pipe is connected to an exhaust pipe, and a fan is arranged on the exhaust pipe, and further comprises:

[0008] A waste heat recovery component, which is arranged inside the recovery bin and includes a spiral plate, an air circulation structure and a water circulation structure. The spiral plate is a spiral ring, and the circumference of the spiral plate is connected to the inner wall of the recovery bin. The spiral plate cooperates with the air circulation structure, and the spiral plate cooperates with the water circulation structure.

[0009] A filter structure is provided, wherein the filter structure is matched with the waste gas pipe and the exhaust pipe.

[0010] As a further solution of the utility model: the air circulation structure includes a vertical pipe, an air supply pipe and a baffle. The vertical pipe passes through the center of the recovery bin and is fixedly connected to the recovery bin. The top of the vertical pipe is connected to the air pump, and the outer wall of the vertical pipe is fixedly connected to the inner wall of the spiral plate. One end of the air supply pipe is connected to the bottom end of the vertical pipe, and the other end is connected to the furnace body. There are multiple baffles, all of which are fixedly arranged on the inner side of the vertical pipe.

[0011] As a further solution of the utility model: the water circulation structure includes a spiral tube, a solenoid valve, a water tank and a temperature sensor. The cross-section of the spiral tube is a semicircular tube. The outer wall of the spiral tube includes an arc outer wall and a plane outer wall. The plane outer wall of the spiral tube is cooperatively connected to the outer wall of the spiral plate. One end of the spiral tube is connected to a water supply pipe, and the other end is connected to a drain pipe. The water tank is fixed on the top of the recovery bin. The water tank is connected to the spiral tube through the water supply pipe. The drain pipe is cooperatively connected to the solenoid valve. A temperature sensor is fixed on the inside of the recovery bin. The detection end of the temperature sensor is located at the end of the spiral tube away from the water tank. The temperature sensor is electrically connected to the solenoid valve.

[0012] As a further solution of the utility model: the filtering structure includes a filter screen and an activated carbon filter screen, the filter screen is arranged in cooperation with the inner side of the exhaust pipe, and the activated carbon filter screen is arranged in cooperation with the inner side of the exhaust pipe.

[0013] As a further solution of the utility model: each of the baffles is inclined toward an end away from the air supply pipe, and the baffles are staggered on both sides of the vertical pipe.

[0014] As a further solution of the utility model: a plurality of guide plates are evenly distributed vertically on the inner side of the recovery bin, and the guide plates are staggeredly arranged in coordination with the spiral plates.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. In the utility model, a spiral plate is arranged so that the spiral plate divides the recovery bin into a spiral channel, and the exhaust gas flows along the spiral channel, extending the exhaust gas flow path. Since the cross section of the spiral tube is a semicircular tube, the spiral plate is a heat exchange plate, and the plane outer wall of the spiral tube is connected to the outer wall of the spiral plate, the heat exchange area between the two is increased, and the heat in the exhaust gas can fully exchange heat with the cold water in the spiral tube, and then the heated hot water is utilized to achieve the purpose of waste heat recovery, and a number of guide plates are arranged along the exhaust gas flow path to increase the residence time of the exhaust gas inside the recovery bin and increase the exhaust gas heat recovery efficiency;

[0017] 2. The utility model filters foreign matter and odor in the exhaust gas through the cooperation of the filter screen and the activated carbon filter screen, so as to prevent the exhaust gas from being directly discharged and polluting the environment;

[0018] 3. In the utility model, the exhaust gas is guided along the spiral channel and moves around the vertical pipe toward the exhaust pipe, so that the temperature of the vertical pipe increases, thereby increasing the temperature of the air to be reacted inside the vertical pipe. Then the air inside the vertical pipe enters the interior of the furnace body through the guidance of the air supply pipe, providing preheated combustion-supporting oxygen during smelting, reducing industrial consumption during smelting. Since a plurality of baffles are arranged inside the vertical pipe, the baffles divide the vertical pipe into a plurality of cavities, slowing down the air flow rate, thereby making the air temperature in the vertical pipe higher and improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the connection structure between the spiral plate and the recovery bin of the utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the recycling bin of the utility model.

[0022] Illustration: 1. Furnace body; 2. Exhaust pipe; 3. Fan; 4. Air pump; 5. Filter; 6. Recovery bin; 7. Spiral plate; 8. Exhaust pipe; 9. Activated carbon filter; 10. Vertical pipe; 11. Air supply pipe; 12. Spiral pipe; 13. Water supply pipe; 14. Drain pipe; 15. Water tank; 16. Solenoid valve; 17. Temperature sensor; 18. Baffle; 19. Guide plate. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figures 1 to 3 As shown, an aluminum furnace waste heat recovery device includes a furnace body 1, a waste gas pipe 2, and a recovery bin 6. One end of the waste gas pipe 2 is connected to the furnace body 1, and the other end is connected to the recovery bin 6. The waste gas pipe 2 is used to transmit waste gas. The end of the recovery bin 6 away from the waste gas pipe 2 is connected to the exhaust pipe 8. The waste gas flows out from the exhaust pipe 8 after being treated. The waste gas pipe 2 is provided with a fan 3. The waste gas enters the recovery bin 6 through the operation of the fan 3. The recovery device also includes a waste heat recovery component and a filtering structure.

[0025] The waste heat recovery component is arranged inside the recovery bin 6, and the waste heat recovery component includes a spiral plate 7, an air circulation structure and a water circulation structure. The spiral plate 7 is a spiral ring, and the spiral plate 7 is a heat exchange plate. The spiral plate 7 is connected to the inner wall of the recovery bin 6 on its circumference. The spiral plate 7 cooperates with the air circulation structure, so that the spiral plate 7 divides the recovery bin 6 into a spiral channel for the flow of waste gas. The spiral plate 7 is connected with the water circulation structure.

[0026] The filtering structure cooperates with the exhaust pipe 2 and the exhaust pipe 8 .

[0027] In some specific embodiments, such as Figure 3 As shown, in order to facilitate the preheating of the reacted oxygen, the gas circulation structure includes a vertical pipe 10, an air supply pipe 11, a baffle 18 and an air pump 4. The vertical pipe 10 is used to transmit air. The vertical pipe 10 passes through the center of the recovery bin 6 and is fixedly connected to the recovery bin 6. The top of the vertical pipe 10 is connected to the air pump 4, and the outer wall of the vertical pipe 10 is fixedly connected to the inner wall of the spiral plate 7. One end of the air supply pipe 11 is connected to the bottom end of the vertical pipe 10, and the other end is connected to the furnace body 1. A plurality of baffles 18 are provided, all of which are fixedly arranged on the inner side of the vertical pipe 10.

[0028] The exhaust gas is introduced into the spiral channel of the recovery bin 6 through the exhaust pipe 2, so that the exhaust gas with a large amount of heat is discharged into the inside of the spiral channel. The exhaust gas rotates around the vertical pipe 10 along the spiral channel and moves toward the exhaust pipe 8. Finally, the exhaust gas is discharged through the exhaust pipe 8 at the bottom of the recovery bin 6. This process increases the temperature of the vertical pipe 10. The air to be reacted is introduced into the vertical pipe 10 through the air pump 4. As the temperature of the vertical pipe 10 increases, the temperature of the normal temperature air inside the vertical pipe 10 increases. The air supply pipe 11 is connected to the furnace body 1, and the gas is pushed by the air pump 4. The heated air inside the vertical pipe 10 enters the inside of the furnace body 1 through the guidance of the air supply pipe 11, providing preheated combustion-supporting oxygen during smelting, thereby reducing industrial consumption during smelting.

[0029] In some specific embodiments, such as Figure 2As shown, in order to facilitate the conversion of the heat of the exhaust gas into the heat of the water, the water circulation structure includes a spiral tube 12, a solenoid valve 16, a water tank 15 and a temperature sensor 17. The cross-section of the spiral tube 12 is a semicircular tube. The outer wall of the spiral tube 12 includes an arc outer wall and a plane outer wall. The plane outer wall of the spiral tube 12 is connected to the outer wall of the spiral plate 7 to increase the heat exchange area. One end of the spiral tube 12 is connected to a water supply pipe 13, and the other end is connected to a drain pipe 14. The bottom end of the drain pipe 14 is connected to an insulation bucket. The water tank 15 is fixed on the top of the recovery bin 6. The water tank 15 is connected to the spiral tube 12 through the water supply pipe 13. The drain pipe 14 is connected to the solenoid valve 16. A temperature sensor 17 is fixed on the inside of the recovery bin 6. The detection end of the temperature sensor 17 is located at the end of the spiral tube 12 away from the water tank 15. The temperature sensor 17 is electrically connected to the solenoid valve 16.

[0030] The fan 3 introduces the exhaust gas into the recovery bin 6 through the exhaust pipe 2, and the exhaust gas flows along the spiral channel. Since the spiral plate 7 is arranged in coordination with the spiral tube 12, the spiral plate 7 is a heat exchange plate, which conducts the heat in the exhaust gas to the spiral tube 12, and can heat the cold water in the spiral tube 12. The bottom end of the spiral tube 12 is connected to the insulation barrel, which is convenient for utilizing the hot water to achieve the purpose of waste heat recovery and avoid heat loss and heat waste. The temperature of the water at the bottom end of the spiral tube 12 is detected by the temperature sensor 17. When the water in the spiral tube 12 is heated to a certain temperature, the temperature sensor 17 will convert the temperature signal into an electrical signal and transmit it to the control terminal, so that the solenoid valve 16 is opened through the control terminal, and the hot water in the spiral tube 12 is released into the insulation barrel. At this time, the water in the water tank 15 flows into the spiral tube 12 under the action of gravity, so that the water temperature in the spiral tube 12 drops until the temperature drops to the set threshold value, and the temperature sensor 17 transmits the signal to the control terminal, so that the solenoid valve 16 is closed through the control terminal.

[0031] In some specific embodiments, such as Figure 3 As shown, in order to avoid direct exhaust gas discharge affecting the environment, the filtering structure includes a filter screen 5 and an activated carbon filter screen 9. The filter screen 5 is arranged on the inner side of the exhaust pipe 2, and the activated carbon filter screen 9 is arranged on the inner side of the exhaust pipe 8.

[0032] When the exhaust gas passes through the exhaust pipe 2, the filter 5 performs preliminary filtration on the exhaust gas. After the heat exchange is completed, the exhaust gas is discharged through the activated carbon filter 9 for secondary filtration. The filter 5 and the activated carbon filter 9 work together to filter foreign matter and odor in the exhaust gas to prevent foreign matter and dust from being directly discharged and polluting the environment.

[0033] In some specific embodiments, such as Figure 3As shown, in order to slow down the air flow speed, each baffle 18 is inclined toward the end away from the air supply pipe 11, and the baffles 18 are staggered on both sides of the vertical pipe 10. A plurality of baffles 18 are arranged inside the vertical pipe 10. The baffles 18 divide the vertical pipe 10 into a plurality of cavities, slowing down the air flow speed, thereby making the air temperature in the vertical pipe 10 higher.

[0034] In some specific embodiments, such as Figure 3 As shown, in order to slow down the flow rate of the exhaust gas, a number of guide plates 19 are evenly distributed vertically on the inner side of the recovery bin 6. The guide plates 19 are staggered with the spiral plates 7, and a number of guide plates 19 are arranged on the spiral channel where the exhaust gas flows, so that the exhaust gas with a large amount of heat stays in the recovery bin 6 for a longer time, thereby increasing the exhaust gas heat recovery efficiency.

[0035] In order for those skilled in the art to better understand the working principle of the embodiments of the present invention, the following is an explanation in conjunction with specific application scenarios:

[0036] The fan 3 guides the exhaust gas into the recovery bin 6 through the exhaust pipe 2. When the exhaust gas passes through the exhaust pipe 2, the filter 5 performs preliminary filtering on the exhaust gas. The filtered exhaust gas flows along the spiral channel. Since the spiral plate 7 is arranged in cooperation with the spiral tube 12, and the spiral plate 7 is a heat exchange plate, the heat in the exhaust gas is transferred to the spiral tube 12, which can heat the cold water in the spiral tube 12. The bottom end of the spiral tube 12 is connected to an insulation bucket to facilitate the use of hot water to achieve the purpose of waste heat recovery. In addition, a number of guide plates 19 are arranged on the spiral channel of the exhaust gas flow, so that the exhaust gas with a large amount of heat stays in the recovery bin 6 for a longer time, thereby increasing the exhaust gas heat recovery efficiency. The temperature of the water inside the spiral tube 12 is measured by the temperature sensor 17. Detection, when the water in the spiral tube 12 is heated to a certain temperature, the temperature sensor 17 will convert the temperature signal into an electrical signal and transmit it to the control terminal, so that the solenoid valve 16 is opened through the control terminal to release the hot water in the spiral tube 12, and then the hot water is used. At this time, the water in the water tank 15 flows into the spiral tube 12 under the action of gravity, so that the water temperature in the spiral tube 12 drops, until the temperature drops to the set threshold, the temperature sensor 17 transmits the signal to the control terminal, so that the solenoid valve 16 is closed through the control terminal, and the exhaust gas is discharged through the activated carbon filter 9 for secondary filtration after the heat exchange is completed. The filter 5 and the activated carbon filter 9 cooperate to filter the foreign matter and odor in the exhaust gas;

[0037] The waste gas is introduced into the spiral channel of the recovery bin 6 through the waste gas pipe 2, so that the waste gas with a large amount of heat is discharged into the inside of the spiral channel, and the waste gas rotates around the vertical pipe 10 along the spiral channel and moves toward the exhaust pipe 8, so that the temperature of the vertical pipe 10 increases, and the air to be reacted is introduced into the vertical pipe 10 through the air pump 4, so that the air temperature inside the vertical pipe 10 increases, and then a plurality of baffles 18 are arranged inside the vertical pipe 10, and the baffles 18 divide the vertical pipe 10 into a plurality of cavities, slowing down the air flow speed, so that the air temperature in the vertical pipe 10 is higher, and finally the waste gas is released through the exhaust pipe 8 at the bottom of the recovery bin 6, and the air supply pipe 11 is connected with the furnace body 1, so that the air inside the vertical pipe 10 enters the inside of the furnace body 1 through the guidance of the air supply pipe 11, providing preheated combustion-supporting oxygen during smelting, thereby reducing industrial consumption during smelting.

[0038] The above embodiments are only used to illustrate the technical method of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical method of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the utility model.

Claims

1. An aluminum furnace waste gas waste heat recovery device, comprising a furnace body (1), an exhaust pipe (2), and a recovery bin (6), wherein one end of the exhaust pipe (2) is connected to the furnace body (1), and the other end is connected to the recovery bin (6), and the end of the recovery bin (6) away from the exhaust pipe (2) is connected to an exhaust pipe (8), and a fan (3) is provided on the exhaust pipe (2), characterized in that: Also includes: A waste heat recovery component, the waste heat recovery component is arranged inside the recovery bin (6), and the waste heat recovery component comprises a spiral plate (7), an air circulation structure and a water circulation structure, the spiral plate (7) is a spiral ring, and the circumference of the spiral plate (7) is connected to the inner wall of the recovery bin (6), the spiral plate (7) cooperates with the air circulation structure, and the spiral plate (7) is cooperatively connected with the water circulation structure; A filter structure is provided, wherein the filter structure cooperates with an exhaust pipe (2) and an exhaust pipe (8).

2. The aluminum furnace waste gas waste heat recovery device according to claim 1 is characterized in that: The air circulation structure comprises a vertical pipe (10), an air supply pipe (11), a baffle (18) and an air pump (4); the vertical pipe (10) passes through the center of the recovery bin (6) and is fixedly connected to the recovery bin (6); the top of the vertical pipe (10) is connected to the air pump (4), and the outer wall of the vertical pipe (10) is fixedly connected to the inner wall of the spiral plate (7); one end of the air supply pipe (11) is connected to the bottom end of the vertical pipe (10), and the other end is connected to the furnace body (1); a plurality of baffles (18) are provided, and all are fixedly arranged on the inner side of the vertical pipe (10).

3. The aluminum furnace waste gas waste heat recovery device according to claim 1 is characterized in that: The water circulation structure comprises a spiral tube (12), a solenoid valve (16), a water tank (15) and a temperature sensor (17); the cross section of the spiral tube (12) is a semicircular tube; the outer wall of the spiral tube (12) comprises an arc outer wall and a plane outer wall; the plane outer wall of the spiral tube (12) is connected to the outer wall of the spiral plate (7); one end of the spiral tube (12) is connected to a water supply pipe (13) and the other end is connected to a drainage pipe (14); the water tank (15) is fixed on the top of the recovery bin (6); the water tank (15) is connected to the spiral tube (12) through the water supply pipe (13); the drainage pipe (14) is connected to the solenoid valve (16); a temperature sensor (17) is fixed on the inner side of the recovery bin (6); the detection end of the temperature sensor (17) is located at an end of the spiral tube (12) away from the water tank (15); the temperature sensor (17) is electrically connected to the solenoid valve (16).

4. The aluminum furnace waste gas waste heat recovery device according to claim 1 is characterized in that: The filtering structure comprises a filter screen (5) and an activated carbon filter screen (9), wherein the filter screen (5) is arranged in cooperation with the inner side of the exhaust pipe (2), and the activated carbon filter screen (9) is arranged in cooperation with the inner side of the exhaust pipe (8).

5. The aluminum furnace waste gas waste heat recovery device according to claim 2 is characterized in that: Each of the baffles (18) is arranged obliquely toward an end away from the air supply pipe (11), and the baffles (18) are arranged alternately on both sides of the interior of the vertical pipe (10).

6. The aluminum furnace waste gas waste heat recovery device according to claim 1, characterized in that: A plurality of guide plates (19) are evenly distributed vertically on the inner side of the recovery bin (6), and the guide plates (19) are arranged in a staggered manner in coordination with the spiral plates (7).

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