Cooling device suitable for combustion waste gas of aluminum waste paint removing kiln

Abstract

The utility model discloses a cooling device suitable for combustion waste gas of an aluminum waste paint removing kiln, and relates to the technical field of aluminum waste recycling paint removing kiln systems. The heat exchange tube components are distributed and mounted in the tower body; the tower cover is mounted at the top end of the tower body; a flue gas inlet and a flue gas outlet are formed in the tower cover; the cooling fan is connected to the side of the bottom of the tower body; the base is mounted at the bottom of the tower body; openings in the upper and lower ends of the heat exchange tube assembly are respectively communicated into the tower cover and the base; high-temperature flue gas enters the heat exchange tube assembly along the flue gas inlet and is gradually conveyed into the base to form dust particles to fall down; the flue gas in the base turns back upwards and is conveyed to the flue gas outlet through the heat exchange tube assembly to be discharged; the cooling fan conveys cooling air into the tower body so as to reduce the temperature of flue gas in the heat exchange tube assembly; the sealing unit is mounted at the bottom of the heat exchange tube assembly to prevent the flue gas from being mixed with the cooling air; the device is optimized in structure, dust particles are settled and filtered out, and rapid cooling is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum waste recycling and paint stripping kiln systems, in particular to a cooling device suitable for combustion exhaust gas of aluminum waste paint stripping kilns. Background Art

[0002] In order to respond to the country's goals of achieving carbon peak and carbon neutrality and realize resource recycling, the recycled aluminum industry has developed rapidly in recent years. In order to promote the healthy and sustainable development of the recycled aluminum industry, while improving resource utilization, higher requirements are also placed on the quality and environmental protection of recycled aluminum products.

[0003] In the process of recycling and reusing aluminum scrap, paint stripping is an important step to improve the recovery rate and reduce the emission of harmful substances. The low-temperature flue gas containing oil and water components (VOC) produced after paint stripping is fully decomposed by incineration technology to remove harmful substances such as dioxins, and the flue gas is processed through the waste gas treatment system to fully meet the national environmental protection requirements; the flue gas temperature after incineration is generally between 750℃ and 850℃, and the inlet temperature of the waste gas treatment system is generally between 200℃ and 250℃.

[0004] Therefore, in view of the technical defects in the existing aluminum waste recycling and reuse process, a simple and effective flue gas cooling device is designed to further meet the requirements of stable operation, small space occupation, and rapid cooling of flue gas. Summary of the Invention

[0005] The purpose of the utility model is to provide a cooling device for exhaust gas from an aluminum scrap paint stripping kiln, which has a simple and effective flue gas cooling device, meets the requirements of stable operation, small space occupation, and rapid cooling of the flue gas.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] Cooling device for combustion exhaust gas from aluminum scrap paint stripping kiln, including:

[0008] tower body;

[0009] Heat exchange tube assemblies, the heat exchange tube assemblies are distributed and installed in the tower body;

[0010] A tower cover, which is installed on the top of the tower body;

[0011] A smoke inlet and a smoke outlet are formed on the tower cover;

[0012] A cooling fan is connected to the side of the bottom of the tower body;

[0013] A base, the base being mounted on the bottom of the tower body;

[0014] The upper and lower openings of the heat exchange tube assembly are connected to the tower cover and the base respectively;

[0015] High-temperature flue gas enters the heat exchange tube assembly along the flue gas inlet and is gradually transferred into the base to form dust particles falling;

[0016] The flue gas in the base is turned back upward and is transmitted through the heat exchange tube assembly to be discharged along the flue gas outlet;

[0017] The cooling fan delivers cooling air to the interior of the tower body to reduce the temperature of the flue gas inside the heat exchange tube assembly;

[0018] Also includes:

[0019] The sealing unit is installed at the bottom of the heat exchange tube assembly to prevent the flue gas in the base from mixing with the cooling air in the tower body.

[0020] Furthermore, the heat exchange tube assembly comprises a first heat exchange tube portion and a second heat exchange tube portion;

[0021] The flue gas is input along the first portion of the heat exchange tube and output along the second portion of the heat exchange tube.

[0022] Furthermore, a partition is installed between the tower cover and the tower body;

[0023] The upper end of the heat exchange tube assembly is welded to a portion of the partition plate and extends into the tower cover;

[0024] The gap between the partition plate and the heat exchange tube assembly is filled with refractory material.

[0025] Furthermore, two partitions are installed in the tower cover;

[0026] The tower cover is divided into two groups of closed spaces by a partition plate to realize the distribution and installation of the first and second heat exchange tubes and prevent the mixing of flue gases;

[0027] Refractory materials are cast on the inner wall of the smoke inlet end and one side wall of the two partitions.

[0028] Furthermore, a sealing plate is installed between the tower body and the base;

[0029] The lower end of the heat exchange tube assembly passes through a portion of the sealing plate and extends into the base;

[0030] The flue gas passes through the first part of the heat exchange tube downwardly into the base and is discharged upwardly through the second part of the heat exchange tube.

[0031] Furthermore, a second sealing plate is connected below the first sealing plate;

[0032] A clamping space is formed between the first sealing plate portion and the second sealing plate portion to clamp the sealing unit;

[0033] The heat exchange tube assembly expands due to heat and stretches downward until it passes through the first sealing plate, the sealing unit, and the second sealing plate in sequence;

[0034] The heat exchange tube assembly expands or contracts and forms relative motion with the sealing plate portion, the sealing unit, and the sealing plate portion.

[0035] Furthermore, the sealing unit has a CF rope and a casing;

[0036] The CF ropes are spirally distributed to form a tubular structure;

[0037] The sleeve is covered on the outside of the CF rope;

[0038] The sleeve and the CF rope are wrapped around the outside of the heat exchange tube assembly extending below a portion of the sealing plate;

[0039] The two ends of the sleeve and the CF rope are respectively fixed against the first sealing plate and the second sealing plate.

[0040] Furthermore, a bolt is welded on a portion of the sealing plate;

[0041] The two parts of the sealing plate are provided with bolt holes corresponding to the positions of the bolts;

[0042] The bolts are inserted into the bolt holes and are tightened and fixed by nuts.

[0043] Furthermore, thermocouples are installed at the smoke inlet and smoke outlet respectively to detect the temperature of the smoke entering and exiting;

[0044] The thermocouple detects the temperature signal of the smoke exhaust and transmits it to the temperature controller;

[0045] The temperature controller is connected to the variable frequency motor;

[0046] The temperature controller obtains temperature data and controls the variable frequency motor to adjust the operation mode;

[0047] The variable frequency motor drives the cooling fan to deliver cooling air to the interior of the tower body so as to reduce the temperature of the flue gas inside the heat exchange tube assembly and keep it stable.

[0048] Furthermore, an air outlet is provided on one side above the tower body for exhausting air;

[0049] An inspection port is provided above the tower cover for inspection and maintenance.

[0050] In the above technical solution, the cooling device of the utility model for the combustion exhaust gas of the aluminum scrap paint stripping kiln has the following beneficial effects:

[0051] The utility model provides a cooling device suitable for the exhaust gas from combustion in an aluminum scrap paint stripping kiln. The device has an optimized structure, and the high-temperature flue gas is circulated and discharged through a heat exchange tube assembly, which can not only settle and filter out dust particles, but also cooperate with a cooling fan to achieve rapid cooling. The equipment has a compact structure, stable operation, and good flue gas cooling and dust removal effects, meeting usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0053] Figure 1 A schematic diagram of the structure of a cooling device for combustion exhaust gas from an aluminum scrap paint stripping kiln provided in an embodiment of the present utility model;

[0054] Figure 2 A schematic diagram of the partial structure of a cooling device for exhaust gas from an aluminum scrap paint stripping kiln provided in an embodiment of the present utility model;

[0055] Figure 3 A schematic diagram of the partial structure of a cooling device for exhaust gas from an aluminum scrap paint stripping kiln provided in an embodiment of the present utility model;

[0056] Figure 4 A schematic diagram of the partial structure of a cooling device for exhaust gas from an aluminum scrap paint stripping kiln provided in an embodiment of the present utility model;

[0057] Figure 5 A schematic diagram of the partial structure of a cooling device for exhaust gas from an aluminum scrap paint stripping kiln provided in an embodiment of the present utility model;

[0058] Figure 6 for Figure 5 A magnified schematic diagram of point A;

[0059] Figure 7 A schematic diagram of the partial structure of a cooling device for exhaust gas from an aluminum scrap paint stripping kiln provided in an embodiment of the present utility model;

[0060] Figure 8 for Figure 7 An enlarged schematic diagram of point B;

[0061] Figure 9 A schematic diagram of the partial structure of a cooling device for exhaust gas from an aluminum scrap paint stripping kiln provided in an embodiment of the present utility model;

[0062] Figure 10Schematic diagram of the flue gas flow direction of the cooling device for the exhaust gas from the aluminum scrap paint stripping kiln provided in the embodiment of the utility model;

[0063] Figure 11 Schematic diagram of the flue gas flow direction (flue gas inlet and flue gas outlet) of the cooling device for the exhaust gas from the aluminum scrap paint stripping kiln provided in the embodiment of the present invention;

[0064] Figure 12 Schematic diagram of the flue gas flow direction of the cooling device for the combustion exhaust gas of the aluminum scrap paint stripping kiln provided by the embodiment of the present invention (at the base).

[0065] Description of reference numerals:

[0066] 1. Tower body; 2. Heat exchange tube assembly; 3. Tower cover; 4. Cooling fan; 5. Base; 6. Sealing unit; 9. Thermocouple;

[0067] 11. Air outlet;

[0068] 21. Heat pipe part 1; 22. Heat exchange tube part 2; 23. Telescopic end;

[0069] 31. Smoke inlet; 32. Smoke outlet; 33. Inspection port;

[0070] 61. CF rope; 62. Casing;

[0071] 71. Partition 1; 72. Partition 2;

[0072] 81. Sealing plate part 1; 82. Sealing plate part 2; 83. Bolt; 84. Bolt hole; 85. Nut. DETAILED DESCRIPTION

[0073] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0074] It should be noted that the terms "side", "bottom", "lower end", "top", "outside", "above", etc. used in this article to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. Similar expressions are only for illustrative purposes, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in addition, the terms "one part", "two parts", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0075] See also Figures 1-12 As shown;

[0076] Cooling device for combustion exhaust gas from aluminum scrap paint stripping kiln, including:

[0077] Tower body 1;

[0078] Heat exchange tube assembly 2, heat exchange tube assembly 2 is distributed and installed in the tower body 1;

[0079] The tower cover 3 is installed on the top of the tower body 1;

[0080] The tower cover 3 is formed with a smoke inlet 31 and a smoke outlet 32;

[0081] Cooling fan 4, cooling fan 4 is connected to the side of the bottom of the tower body 1;

[0082] The base 5 is installed at the bottom of the tower body 1;

[0083] The upper and lower openings of the heat exchange tube assembly 2 are connected to the tower cover 3 and the base 5 respectively;

[0084] The high-temperature flue gas enters the heat exchange tube assembly 2 along the flue gas inlet 31 and is gradually transferred to the base 5 to form dust particles falling;

[0085] The flue gas in the base 5 is turned back upward and is transmitted through the heat exchange tube assembly 2 to be discharged along the flue gas outlet 32;

[0086] The cooling fan 4 delivers cooling air to the interior of the tower body 1 to reduce the temperature of the flue gas inside the heat exchange tube assembly 2;

[0087] Also includes:

[0088] The sealing unit 6 is installed at the bottom of the heat exchange tube assembly 2 to prevent the flue gas in the base 5 from mixing with the cooling air in the tower body 1.

[0089] The tower body 1 is provided with a tower cover 3 and a base 5, and the tower body 1, the tower cover 3 and the base 5 form an upright tower structure. A heat exchange tube assembly 2 is installed inside the tower body 1, and the heat exchange tube assembly 2 can be connected to the tower cover 3 and the base 5. A flue gas inlet 31 and a flue gas outlet 32 ​​are provided on the tower cover 3. After the high-temperature flue gas enters from the flue gas inlet 31, it is transmitted downward along the heat exchange tube assembly 2 on one side and is transmitted to the bottom, that is, the flue gas enters the base 5. Under the action of gravity, impurity particles in the flue gas gradually fall into the base 5. Then the flue gas returns and is transmitted upward along the heat exchange tube assembly 2 on the other side, and is finally discharged into the environmental protection system through the flue gas outlet 32. At the same time, a cooling fan 4 is installed on the side of the bottom of the tower body 1. In the process of the flue gas being transmitted along the heat exchange tube assembly 2, the cooling fan 4 transports cooling air to the inside of the tower body 1, so as to cool the flue gas in the heat exchange tube assembly 2 and reduce the temperature of the discharged flue gas.

[0090] Furthermore, the cooling air delivered by the cooling fan 4 directly enters the tower body 1. In order to prevent the cooling air from mixing with the flue gas transmitted to the base 5 by the heat exchange tube assembly 2, a sealing unit 6 is installed at the bottom of the heat exchange tube assembly 2, that is, between the heat exchange tube assembly 2 and the base 5. The sealing unit 6 blocks the cooling gas and the flue gas from entering each other's areas, ensuring that the cooling process is not affected.

[0091] The heat exchange tube assembly 2 comprises a first heat exchange tube portion 21 and a second heat exchange tube portion 22;

[0092] The flue gas is input along the first heat exchange tube portion 21 and output along the second heat exchange tube portion 22 .

[0093] Specifically, the heat exchange tube assembly 2 has a heat exchange tube portion 21 and a heat exchange tube portion 22. The heat exchange tube portion 21 is the first tube pass, and the high-temperature flue gas enters the heat exchange tube portion 21 and is transmitted downward. The heat exchange tube portion 22 is the second tube pass. After the flue gas in the first tube pass reaches the base 5, it turns back upward and is transmitted upward along the heat exchange tube portion 22 until it is discharged through the flue gas outlet 32.

[0094] A partition plate 71 is installed between the tower cover 3 and the tower body 1;

[0095] The upper end of the heat exchange tube assembly 2 is welded to a portion of the partition 71 and extends into the tower cover 3;

[0096] The gap between the partition plate portion 71 and the heat exchange tube assembly 2 is filled with refractory material.

[0097] Specifically, the tower cover 3 is separated from the tower body 1 by a partition 71, the pipe body extends through the partition 71 into a part of the space of the tower cover 3, and the pipe body and the partition 71 are welded and fixed, wherein there is a certain gap between the outer wall of the pipe body and the partition 71, and the gap is filled with refractory material (the refractory material is RM12-1.35 from Beijing Rongda, and the refractory material density is 1350kg / m 3 , temperature resistance 1400℃

[0098] ), refractory material is coated on the outside of the pipe body. Even if the pipe is burned or corroded after long-term use, the refractory material can still be used as a pipeline to ensure the normal operation of the equipment.

[0099] The tower cover 3 is provided with two partition plates 72;

[0100] The tower cover 3 is divided into two groups of closed spaces by the second partition plate 72 to achieve the distributed installation of the first heat exchange tube 21 and the second heat exchange tube 22 and prevent the mixing of flue gases;

[0101] Refractory materials are cast on the inner wall of the flue gas inlet end 31 and one side wall of the second partition portion 72 .

[0102] Specifically, a second partition 72 is installed in the tower cover 3, and the second partition 72 is perpendicular to the first partition 71. The second partition 72 divides the internal space of the tower cover 3 into two areas, corresponding to the flue gas inlet 31 and the flue gas outlet 32 ​​respectively, so that the flue gas entering from the flue gas inlet 31 and the flue gas discharged from the flue gas outlet 32 ​​will not be mixed with each other. The inner wall of the flue gas inlet 31 area is cast with refractory material (with high temperature resistance and corrosion resistance) to avoid burning and corrosion and extend the service life. The inlet adopts the combination of ordinary steel and refractory material, and the temperature resistance can reach 900°C.

[0103] A sealing plate portion 81 is installed between the tower body 1 and the base 5;

[0104] The lower end of the heat exchange tube assembly 2 passes through the sealing plate portion 81 and extends into the base 5;

[0105] The flue gas flows downwardly into the base 5 through the first heat exchange tube portion 21 and is discharged upwardly through the second heat exchange tube portion 22 .

[0106] The sealing plate part 1 81 is connected to the sealing plate part 2 82 below;

[0107] A clamping space is formed between the sealing plate portion 81 and the sealing plate portion 82 to clamp the sealing unit 6;

[0108] The heat exchange tube assembly 2 expands due to heat and stretches downward until it passes through the sealing plate portion 1 81, the sealing unit 6, and the sealing plate portion 2 82 in sequence;

[0109] The heat exchange tube assembly 2 expands or contracts and forms relative motion with the sealing plate portion 1 81 , the sealing unit 6 , and the sealing plate portion 2 82 .

[0110] Specifically, the tower body 1 and the base 5 are separated by a sealing plate portion 81. The tube body passes through the sealing plate portion 81 and extends into a partial space of the base 5. The lower portion of the heat exchange tube assembly 2 extending into the base 5 is a free and retractable end. The heat exchange tube assembly 2 will stretch downward when heated and expand. A gap is left between the sealing plate portion 81 and the heat exchange tube assembly 2 for the expansion and contraction of the heat exchange tube body. The sealing plate portion 81 is fixedly welded to the tower body 1. The sealing plate portion 2 82 is fixedly connected to the lower portion of the sealing plate 81. When the heat exchange tube assembly 2 is heated and stretched downward, it will pass through the sealing plate portion 81 and the sealing plate portion 82. The sealing unit 6 is installed in the gap between the sealing plate portion 81 and the sealing plate portion 82. Each group of sealing units 6 is outside the trajectory of the downward stretching of the heat exchange tube body. When the heat exchange tube body stretches downward, the sealing unit 6 is wrapped around the outside of the heat exchange tube body. The heat-expanded heat exchange tube body gradually fills the gap between the sealing plate part 81, the sealing unit 6, and the sealing plate part 82. That is, during the expansion and contraction of the heat exchange tube body, the sealing plate part 81, the sealing unit 6, and the sealing plate part 82 have relative movement. At the same time, the sealing unit 6 is clamped by the sealing plate part 81 and the sealing plate part 82. The sealing unit 6 has a sealing effect. Under the premise of ensuring that the heat exchange tube assembly 2 can freely expand and contract, the high-temperature hot flue gas area and the cooling medium are sealed, effectively preventing the flue gas from mixing with the cooling air.

[0111] The sealing unit 6 has a CF rope 61 and a sleeve 62;

[0112] The CF rope 61 is spirally distributed to form a tubular structure;

[0113] The sleeve 62 is wrapped around the outside of the CF rope 61;

[0114] The sleeve 62 and the CF rope 61 are wrapped around the outside of the heat exchange tube assembly 2 extending below a portion 81 of the sealing plate;

[0115] The ends of the sleeve 62 and the CF rope 61 are fixed against the sealing plate part 1 81 and the sealing plate part 2 82 respectively.

[0116] Specifically, the sealing unit 6 has a CF rope 61 and a sleeve 62. The CF rope 61 is a ceramic fiber rope with a high temperature resistance of up to 1260°. The CF rope 61 is located inside the sleeve 62. The CF rope 61 is wound 4 times to form a tubular structure, wherein the two ends of the CF rope 61 and the sleeve 62 are respectively fixed against the sealing plate part 1 81 and the sealing plate part 2 82. The sealing plate part 2 82 is located parallel to and below the sealing plate part 1 81. When the heat exchange tube assembly 2 passes through the sealing plate part 1 81 and is stretched downward, it passes through the sealing unit 6 and the sealing plate part 2 82 in turn. During the expansion process, the heat exchange tube assembly 2 makes the tube body close to the sealing unit 6, and the sealing unit 6 effectively prevents the flue gas in the base 5 from mixing with the cooling air in the tower body 1.

[0117] A bolt 83 is welded to a portion 81 of the sealing plate;

[0118] The second sealing plate portion 82 is provided with bolt holes 84 corresponding to the positions of the bolts 83;

[0119] The bolt 83 is inserted into the bolt hole 84 and is tightened and fixed by the nut 85 .

[0120] Specifically, the sealing plate part 81 is fixedly welded on the inner wall of the tower body 1, and the sealing plate part 2 82 located below the sealing plate part 81 is fixed together with the sealing plate part 81 by bolts 83. The sealing plate part 81 is welded with bolts 83, and the sealing plate part 82 has bolt holes 84. The bolts 83 are inserted into the bolt holes 84 and then used in conjunction with the nuts 85. Tightening the nuts 85 can fix the position of the sealing plate part 82. The sealing plate part 81 and the sealing plate part 82 clamp and fix the CF rope 61 and the sleeve 62, so that the CF rope 61 is compressed and sealed.

[0121] Thermocouples 9 are installed at the smoke inlet 31 and the smoke outlet 32 ​​respectively to detect the temperature of the smoke entering and exiting;

[0122] Thermocouple 9 detects the temperature signal of the exhaust gas and transmits it to the temperature controller;

[0123] The temperature controller is connected to the variable frequency motor;

[0124] The thermostat obtains temperature data and controls the variable frequency motor to adjust the operation mode;

[0125] The variable frequency motor drives the cooling fan 4 to deliver cooling air to the interior of the tower body 1 so as to reduce the temperature of the flue gas inside the heat exchange tube assembly 2 and keep it stable.

[0126] Specifically, the device is equipped with a temperature controller, a thermocouple 9, and a variable frequency motor. First, the temperature controller is connected to the thermocouple 9 to obtain temperature data from the thermocouple. Secondly, the temperature controller sets the temperature control range and determines what measures should be taken based on the temperature data provided by the thermocouple. Then, the temperature controller is connected to the variable frequency motor and the measures are transmitted to the variable frequency motor to make it respond. The variable frequency motor runs at low speed, high speed or stops running, thereby controlling the cooling fan 4 to deliver cooling air, thereby cooling the flue gas in the heat exchange tube assembly 2, so that the flue gas temperature is always maintained within a preset range.

[0127] An air outlet 11 is provided on one side of the upper portion of the tower body 1 for discharging air;

[0128] An inspection port 33 is provided above the tower cover 3 for inspection and maintenance.

[0129] Specifically, an air outlet 11 is provided on the tower body 1, and the cooling air delivered by the cooling fan 4 is neutralized with the heat emitted by the heat exchange tube assembly 2 and then discharged to the outside air through the air outlet 11; the inspection port 33 provided on the tower cover 3 can be used by operators for maintenance.

[0130] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cooling device for exhaust gas from a paint stripping kiln used for aluminum scrap, characterized in that: include: Tower body(1); A heat exchange tube assembly (2), wherein the heat exchange tube assembly (2) is distributed and installed in the tower body (1); A tower cover (3), wherein the tower cover (3) is installed on the top of the tower body (1); A smoke inlet (31) and a smoke outlet (32) are formed on the tower cover (3); A cooling fan (4), the cooling fan (4) being connected to the side of the bottom of the tower body (1); A base (5), the base (5) being mounted on the bottom of the tower body (1); The upper and lower openings of the heat exchange tube assembly (2) are respectively connected to the tower cover (3) and the base (5); High-temperature flue gas enters the heat exchange tube assembly (2) along the flue gas inlet (31) and is gradually transferred to the base (5) to form dust particles falling; The flue gas in the base (5) is turned back upward and is transmitted through the heat exchange tube assembly (2) to be discharged along the flue gas outlet (32); The cooling fan (4) delivers cooling air to the interior of the tower body (1) to reduce the temperature of the flue gas inside the heat exchange tube assembly (2); Also includes: A sealing unit (6) is installed at the bottom of the heat exchange tube assembly (2) to prevent the flue gas in the base (5) from mixing with the cooling air in the tower body (1).

2. The cooling device for exhaust gas from an aluminum scrap paint stripping kiln according to claim 1, characterized in that: The heat exchange tube assembly (2) comprises a first heat exchange tube section (21) and a second heat exchange tube section (22); The flue gas is input along the first heat exchange tube portion (21) and output along the second heat exchange tube portion (22).

3. The cooling device for exhaust gas from an aluminum scrap paint stripping kiln according to claim 1, characterized in that: A partition plate portion (71) is installed between the tower cover (3) and the tower body (1); The upper end of the heat exchange tube assembly (2) is welded to a portion of the partition (71) and extends into the tower cover (3); The gap between the partition plate portion (71) and the heat exchange tube assembly (2) is filled with refractory material.

4. The cooling device for exhaust gas from an aluminum scrap paint stripping kiln according to claim 2, characterized in that: Two partition plates (72) are installed in the tower cover (3); The tower cover (3) is separated by two partition plates (72) to form two groups of closed spaces so as to achieve the distributed installation of the first heat exchange tube (21) and the second heat exchange tube (22) and prevent the mixing of flue gases; Refractory materials are cast on the inner wall of the smoke inlet (31) and one side wall of the second partition plate (72).

5. The cooling device for exhaust gas from an aluminum scrap paint stripping kiln according to claim 2, characterized in that: A sealing plate portion (81) is installed between the tower body (1) and the base (5); The lower end of the heat exchange tube assembly (2) passes through a portion (81) of the sealing plate and extends into the base (5); The flue gas enters downward into the base (5) through the first heat exchange tube portion (21) and is discharged upward through the second heat exchange tube portion (22).

6. The cooling device for exhaust gas from an aluminum scrap paint stripping kiln according to claim 5, characterized in that: The sealing plate part 1 (81) is connected to the sealing plate part 2 (82) below; A clamping space is formed between the sealing plate part (81) and the sealing plate part (82) to clamp the sealing unit (6); The heat exchange tube assembly (2) expands due to heat and stretches downward until it passes through the sealing plate portion (81), the sealing unit (6), and the sealing plate portion (82) in sequence; The heat exchange tube assembly (2) expands or contracts and forms relative motion with the sealing plate portion (81), the sealing unit (6), and the sealing plate portion (82).

7. The cooling device for exhaust gas from an aluminum scrap paint stripping kiln according to claim 6, characterized in that: The sealing unit (6) comprises a CF rope (61) and a sleeve (62); The CF rope (61) is spirally distributed to form a tubular structure; The sleeve (62) is covered on the outside of the CF rope (61); The sleeve (62) and the CF rope (61) are wrapped around the outside of the heat exchange tube assembly (2) extending below a portion (81) of the sealing plate; The two ends of the sleeve (62) and the CF rope (61) are fixed against the first sealing plate (81) and the second sealing plate (82) respectively.

8. The cooling device for exhaust gas from an aluminum scrap paint stripping kiln according to claim 6, characterized in that: A bolt (83) is welded to a portion (81) of the sealing plate; The second sealing plate portion (82) is provided with bolt holes (84) corresponding to the positions of the bolts (83); The bolt (83) is inserted into the bolt hole (84) and is tightened and fixed by the nut (85).

9. The cooling device for exhaust gas from an aluminum scrap paint stripping kiln according to claim 1, characterized in that: Thermocouples (9) are respectively installed at the smoke inlet (31) and the smoke outlet (32) to detect the temperatures of the smoke entering and exiting. The thermocouple (9) detects the temperature signal of the smoke exhaust and transmits it to the temperature controller; The temperature controller is connected to the variable frequency motor; The temperature controller obtains temperature data and controls the variable frequency motor to adjust the operation mode; The variable frequency motor drives the cooling fan (4) to deliver cooling air to the interior of the tower body (1) so as to reduce the temperature of the flue gas inside the heat exchange tube assembly (2) and maintain it stable.

10. The cooling device for exhaust gas from an aluminum scrap paint stripping kiln according to claim 1, characterized in that: An air outlet (11) is provided on one side of the upper portion of the tower body (1) for discharging air; An inspection opening (33) is provided above the tower cover (3) for inspection and maintenance.

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