A sinter shaft cooling device with multi-stage hoods

Abstract

The application discloses a sintering vertical cooling device with multi-stage air caps, which comprises a feeding hopper, a vertical cooling tank, a first central air supply device, a second central air supply device, a peripheral air supply device and a discharger. The vertical cooling tank is divided into a pre-cooling section, a cooling section and a discharging hopper from top to bottom. The pre-cooling section is provided with a hot air outlet pipeline. The feeding hopper is arranged at the top of the pre-cooling section. The discharger is arranged at the bottom of the discharging hopper. The first central air supply device is arranged corresponding to the position of the cooling section. The peripheral air supply device is also arranged corresponding to the position of the cooling section and is located below the first central air supply device. The second central air supply device is arranged corresponding to the position of the discharging hopper. The first central air supply device and the second central air supply device comprise an air supply pipe, an air cap and an adjusting assembly. The air supply pipe comprises a horizontal section and a vertical section. The adjusting assembly comprises a supporting base, a driving chain, a chain wheel and a vibration adjusting disc. Compared with the prior art, the application can effectively improve the waste heat recovery efficiency.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery technology, and in particular to a sintering vertical cooling device equipped with multi-stage air caps. Background Technology

[0002] Currently, most large and medium-sized sintering machines at home and abroad use belt coolers or ring coolers for sinter cooling. This method is easy to implement, technically mature, and widely used.

[0003] However, the existing waste heat recovery has the following disadvantages: (1) The waste heat utilization efficiency is low, and only part of the heat in the high-temperature sections of cooler I and II is recovered; (2) The air leakage is serious and the sealing is poor, with an air leakage rate as high as 30%-60%, which is difficult to solve; (3) The heat exchange is insufficient, and the heat exchange between hot ore and cooling air is gas-solid crossflow with short heat exchange time, large cooling air volume, and low quality of hot waste gas; (4) The waste heat parameters fluctuate greatly, affecting the stability of the power generation system; (5) Some unused flue gas is directly emitted, polluting the environment; (6) The waste heat recovery rate is low, and the power generation per ton of sintered ore in China is about 8-18 kWh, with an average of less than 15 kWh.

[0004] In view of this, a sintering vertical cooling device with multi-stage air caps is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a sintering vertical cooling device with multi-stage air caps, which can effectively improve waste heat recovery efficiency.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0007] A sintering vertical cooling device with multi-stage air caps includes a feed hopper, a vertical cooling tank, a primary central air supply device, a secondary central air supply device, a peripheral air supply device, and a discharge device. The vertical cooling tank is divided into a pre-cooling section, a cooling section, and a discharge hopper from top to bottom. The pre-cooling section is equipped with a hot air outlet pipe. The feed hopper is located at the top of the pre-cooling section, and the discharge device is located at the bottom of the discharge hopper. The primary central air supply device is positioned corresponding to the cooling section, and the peripheral air supply device is also positioned corresponding to the cooling section and located below the primary central air supply device. The secondary central air supply device is positioned corresponding to the discharge hopper. The primary and secondary central air supply devices include air supply pipes, air caps, and adjusting components. The duct includes a horizontal section and a vertical section. The horizontal section runs through the vertical cooling tank, and the vertical section connects to the horizontal section. The hood includes a hood body and a support rod. The hood body covers the vertical section, and the upper end of the support rod is connected to the hood body. The adjustment assembly includes a support base, a drive chain, a sprocket, and a vibration adjustment disc. The drive chain runs through the horizontal section, the support base is located in the horizontal section, the sprocket is located on the support base and cooperates with the chain, the vibration adjustment disc is horizontally arranged and coaxial with the sprocket, and the vibration adjustment disc is provided with an eccentrically arranged vibration abutment. The support rod passes through the vertical section, and its lower end abuts against the vibration adjustment disc and corresponds to the movement path of the vibration abutment.

[0008] In a preferred embodiment, a plurality of vibrating abutments are provided, and the plurality of vibrating abutments are evenly distributed around the central circumference of the vibration adjustment disc.

[0009] In a preferred embodiment, the vibration adjustment disk has an adjustment cavity with an opening at the top. The vibration abutment is disposed in the adjustment cavity and protrudes from the upper surface of the vibration adjustment disk through the opening. The adjustment cavity has a movable block located on the side of the vibration abutment close to the axis of the vibration adjustment disk.

[0010] In a preferred embodiment, the top and bottom edges of the vibrating abutment are provided with arc-shaped chamfers, and the top edge of the movable block is also provided with arc-shaped chamfers.

[0011] In a preferred embodiment, the feeder is configured as a single-roller feeder.

[0012] In a preferred embodiment, the peripheral air supply device includes a first peripheral air supply pipe and a second peripheral air supply pipe, which are connected to the side of the vertical cooling tank.

[0013] In a preferred embodiment, the adjusting assembly further includes an air duct adjusting pipe and a top-supporting device. The bottom of the cap body has a slot, into which the support rod is inserted. The side of the slot has a first air duct and a second air duct connecting to the bottom of the cap body. The first air duct is located above the second air duct. The top of the longitudinal section has an annular guide groove, and the bottom of the annular guide groove has a through hole. The air duct adjusting pipe includes a pipe body and a top-supporting rod. The lower part of the pipe body is inserted into the annular guide groove. The top-supporting rod is connected to the bottom of the pipe body and passes through the through hole. The side of the pipe body has an air outlet. The sidewall fits against the sidewall of the slot. The abutting device includes a vertical shaft and an adjusting wheel. The vertical shaft is mounted on the support base, and the adjusting wheel is horizontally mounted on the vertical shaft. The top of the adjusting wheel has a first abutting surface and a second abutting surface. The position of the first abutting surface is higher than that of the second abutting surface. There is an arc transition between the first abutting surface and the second abutting surface. The lower end of the abutting rod abuts against the adjusting wheel. The circumference of the adjusting wheel is tangent to the side of the vibration adjustment disk. The side of the adjusting wheel has a notch. The side of the vibration adjustment disk has an inclined paddle for unidirectional paddle movement of the adjusting wheel.

[0014] In a preferred embodiment, at least two through holes are provided, and the abutting rod and the abutting device are provided corresponding to the through holes.

[0015] In a preferred embodiment, the first air duct is shaped like a Venturi tube.

[0016] In a preferred embodiment, the air outlets are provided in multiple ways, and the multiple air outlets are evenly distributed around the circumference of the pipe body.

[0017] Compared with the prior art, the present invention provides a sintering vertical cooling device with multi-stage air caps, which can achieve the following technical objectives:

[0018] 1. Reduce power consumption of cooling system: Currently used blower-type coolers have a large air leakage rate and low cooling air utilization rate. The gas-solid ratio is generally 2200-2500 m3 / t. In contrast, the vertical cooling tank is a closed cooling method with a low air leakage rate and a gas-solid ratio generally in the range of 700-950 Nm3 / t. The required cooling air volume is 1 / 3 of that of traditional blower technology, and the power consumption of the cooling system is greatly reduced.

[0019] 2. Improved adaptability of waste heat power generation system: The vertical cooling tank is equipped with a ore pre-storage section, which can avoid fluctuations in waste heat parameters caused by short-term shutdown of the sintering machine, thus improving the safety of the waste heat power generation system.

[0020] 3. Significant emission reduction effect: The entire system is a closed system, and all equipment operates under negative pressure, which can significantly reduce pollutant emissions and improve the working environment;

[0021] 4. Improve the cooling quality of sinter: The pre-storage section of the cooling furnace is conducive to the homogenization of sinter temperature and the release of residual volatiles, which can improve the strength of sinter; the cooling section is an isothermal cooling process, which can avoid cracking of hot sinter due to rapid cooling, improve the yield of sinter, and reduce the amount of ore returned below 5mm.

[0022] 5. Improve the utilization rate of waste heat from sinter: In traditional dual-pressure technology, less than 50% of the sensible heat of the sinter is absorbed by the cooling air. However, in the cooling furnace, when the sinter is cooled from 700℃ to 100℃, about 80% of the sensible heat of the sinter is absorbed by the cooling air, thus increasing the utilization rate of waste heat from sinter by 60%.

[0023] 6. Enhanced Waste Heat Power Generation Capacity: The counter-current flow of sintered ore and cooling air allows for thorough heat exchange, resulting in a longer heat exchange time. The cooling air can be heated to 400℃~650℃, significantly higher than the extraction temperature of the ring (belt) cold waste heat boiler (approximately 300~400℃). Since the waste heat flue gas temperature is 600~650℃, waste heat power generation can utilize a medium-temperature, medium-pressure dual-pressure power generation system (3.82MPa / 450℃, 0.5MPa / 200℃). Compared to traditional technologies, the Rankine cycle achieves a 25% higher efficiency and generates more power.

[0024] 7. It can smoothly feed materials. By adjusting the components, air caps and feeders, a smooth feeding control process can be achieved. Attached Figure Description

[0025] Figure 1 This invention relates to a structural schematic diagram of a sintering vertical cooling device equipped with multi-stage air caps.

[0026] Figure 2 This invention relates to a longitudinal cross-sectional schematic diagram of the primary central air supply device of a sintering vertical cooling device equipped with multi-stage air caps.

[0027] Figure 3 This is a partially cut-out structural diagram of the primary central air supply device of a sintering vertical cooling device with multi-stage air caps, which relates to the present invention.

[0028] Figure 4 This invention relates to a structural schematic diagram of the vibration regulating disc of the primary central air supply device of a sintering vertical cooling device equipped with multi-stage air caps.

[0029] Figure 5 This invention relates to a schematic diagram of the air duct regulating pipe of the primary central air supply device of a sintering vertical cooling device equipped with multi-stage air caps.

[0030] Figure 6 This invention relates to a schematic diagram of the top device of the primary central air supply device of a sintering vertical cooling device equipped with multi-stage air caps.

[0031] In the picture

[0032] Feed hopper 1; Vertical cooling tank 2; Pre-cooling section 21; Cooling section 22; Discharge hopper 23; Primary central air supply device 4; Secondary central air supply device 5; Horizontal section 61; Longitudinal section 62; Annular guide groove 621; Through hole 622; Cap body 63; Slot 631; First air duct 632; Second air duct 633; ​​Support rod 64; Support base 65; Drive chain 7; Sprocket 71; Vibration adjustment disc 8; Paddle 81; Adjustment chamber 82; Opening 83; Movable block 84; Vibrating abutment 85; Discharge device 9; First peripheral air supply pipe 101; Second peripheral air supply pipe 102; Pipe body 111; Air outlet 112; Abutment rod 113; Vertical shaft 114; Adjustment wheel 115; Notch 116; First abutment surface 117; Second abutment surface 118; Arc transition 119. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings.

[0034] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0035] like Figures 1 to 6As shown, a sintering vertical cooling device with multi-stage air caps includes a feed hopper 1, a vertical cooling tank 2, a primary central air supply device 4, a secondary central air supply device 5, a peripheral air supply device, and a discharge device 9. The vertical cooling tank 2 is divided into a precooling section 21, a cooling section 22, and a discharge hopper 23 from top to bottom. The precooling section 21 is equipped with a hot air outlet pipe. The feed hopper 1 is located at the top of the precooling section 21, and the discharge device 9 is located at the bottom of the discharge hopper 23. The primary central air supply device 4 is positioned corresponding to the cooling section 22, and the peripheral air supply device is also positioned corresponding to the cooling section 22 and located below the primary central air supply device 4. The secondary central air supply device 5 is positioned corresponding to the discharge hopper 23. The primary central air supply device 4 and the secondary central air supply device 5 include air supply pipes, air caps, and adjusting components. The air supply pipe includes a horizontal section 61 and a... The longitudinal section 62 and the transverse section 61 pass through the vertical cooling tank 2. The longitudinal section 62 connects to the transverse section 61. The hood includes a hood body 63 and a support rod 64. The hood body 63 covers the longitudinal section 62, and the upper end of the support rod 64 is connected to the hood body 63. The adjustment assembly includes a support base 65, a drive chain 7, a sprocket 71, and a vibration adjustment disc 8. The drive chain 7 passes through the transverse section 61. The support base 65 is located in the transverse section 61. The sprocket 71 is located on the support base 65 and cooperates with the chain. The vibration adjustment disc 8 is horizontally arranged and coaxially arranged with the sprocket 71. The vibration adjustment disc 8 is provided with an eccentrically arranged vibration abutment 85. The support rod 64 passes through the longitudinal section 62, and its lower end abuts against the vibration adjustment disc 8 and corresponds to the movement path of the vibration abutment 85.

[0036] In its structural configuration, hot ore enters the vertical cooling tank 2 through the feed hopper 1, passes through the precooling section 21, cooling section 22 and discharge hopper 23, and is discharged through the discharge device 9. During this process, the primary central air supply device 4, the secondary central air supply device 5 and the peripheral air supply device supply air to the vertical cooling tank 2 to regulate the atmosphere inside the tank. At the same time, the movement of the material is controlled by the action of the discharge device 9 and the air cap. Specifically, the drive chain 7 is driven by an external power mechanism, such as a drive motor, which causes the chain to move. The movement of the chain drives the sprocket 71 to rotate, thereby driving the vibration adjustment plate 8 to rotate. During the rotation of the vibration adjustment plate 8, when the vibration abutment 85 passes the support rod 64, it lifts the support rod 64, that is, it lifts the air cap. During the continuous rotation of the vibration adjustment plate 8, the vibration abutment 85 intermittently lifts the support member, which manifests as the air cap vibrating. Through the vibration of the air cap, the downward movement of the material can be controlled.

[0037] Furthermore, in order to ensure the frequency of vibration occurrence, multiple vibration abutments 85 are provided, and the multiple vibration abutments 85 are evenly distributed around the central circumference of the vibration adjustment disk 8.

[0038] Furthermore, the vibration regulating disc 8 is provided with an regulating cavity 82, and the top of the regulating cavity 82 is provided with an opening 83. The vibration abutment 85 is disposed in the regulating cavity 82 and protrudes from the upper surface of the regulating disc through the opening 83. The regulating cavity 82 is provided with a movable block 84, which is located on the side of the vibration abutment 85 closer to the axis of the vibration regulating disc 8. The advantage of this arrangement is that when the vibration regulating disc 8 initially rotates, the vibration abutment 85 is in a low position. At this time, the lifting amplitude of the wind cap is small, so that the vibration regulating disc 8 can be smoothly driven to rotate. When the speed reaches a certain value, under the action of centrifugal force, the movable block 84 moves towards the vibration abutment 85, lifting the vibration abutment 85 and raising its position to achieve a large vibration amplitude. That is, through this arrangement, the vibration amplitude can also be adjusted. In addition, this structural design still achieves the protection of the wind cap. Since the vibration damper 85 is a movable part, when the wind cap is subjected to excessive pressure, the vibration damper 85 has room to move, thus providing space for the wind cap to avoid excessive pressure and protecting the wind cap.

[0039] To ensure smooth contact between the components, the top and bottom edges of the vibrating abutment 85 are provided with arc-shaped chamfers, and the top edge of the movable block 84 is also provided with arc-shaped chamfers.

[0040] Specifically, the feeder 9 is configured as a single-roller feeder 9.

[0041] Specifically, the peripheral air supply device includes a first peripheral air supply pipe 101 and a second peripheral air supply pipe 102, which are connected to the side of the vertical cooling tank 2.

[0042] Furthermore, to achieve adjustments for different air outlet patterns, the adjustment assembly also includes an air duct adjustment pipe and a top-supporting device. The bottom of the cap body 63 is provided with a slot 631, into which the support rod 64 is inserted. The side of the slot 631 is provided with a first air duct 632 and a second air duct 633 connecting to the bottom of the cap body 63. The first air duct 632 is located above the second air duct 633. The top of the longitudinal section 62 is provided with an annular guide groove 621, and the bottom of the annular guide groove 621 is provided with a through hole 622. The air duct adjustment pipe includes a pipe body 111 and a top-supporting rod 113. The lower part of the pipe body 111 is inserted into the annular guide groove 621. The top-supporting rod 113 is connected to the bottom of the pipe body 111 and passes through the through hole 622. The side of the pipe body 111 is provided with an air outlet 112. The side wall of body 111 fits against the side wall of slot 631. The abutting device includes a vertical shaft 114 and an adjusting wheel 115. The vertical shaft 114 is mounted on the support base 65. The adjusting wheel 115 is horizontally mounted on the vertical shaft 114. The top of the adjusting wheel 115 is provided with a first abutting surface 117 and a second abutting surface 118. The position of the first abutting surface 117 is higher than the position of the second abutting surface 118. There is an arc transition 119 between the first abutting surface 117 and the second abutting surface 118. The lower end of the abutting rod 113 abuts against the adjusting wheel 115. The circumference of the adjusting wheel 115 is tangent to the side of the vibration adjustment disk 8. The side of the adjusting wheel 115 is provided with a notch 116. The side of the vibration adjustment disk 8 is provided with an inclined paddle 81 for realizing unidirectional paddle movement of the adjusting wheel 115.

[0043] Under the above structural configuration, since the adjusting wheel 115 is provided with a notch 116, when the position of the notch 116 corresponds to the position of the vibration adjusting disk 8, the rotation of the vibration adjusting disk 8 cannot drive the adjusting wheel 115 to rotate. When the position of the notch 116 does not correspond to the position of the vibration adjusting disk 8, the axle of the adjusting wheel 115 contacts the circumferential surface of the vibration adjusting disk 8, so the rotation of the vibration adjusting disk 8 can drive the rotation of the adjusting wheel 115. When the position of the notch 116 corresponds to the vibration adjusting disk 8, the position of the notch 116 can be moved by the lever 81. Since the lever 81 is inclined, the lever 81 can only move the notch 116 in one direction. In this embodiment, it is specified as follows: when the wind cap vibration function is to be realized, the rotation direction of the vibration adjusting disk 8 is direction one, and the direction opposite to direction one is direction two. Direction two is the direction in which the lever 81 can move the notch 116.

[0044] Under the above principle settings, when it is necessary to adjust the air outlet mode, the vibration adjustment disk 8 is rotated in the second direction, which drives the adjustment wheel 115 to rotate. During the rotation of the adjustment wheel 115, the abutment rod 113 switches between the first abutment surface 117 and the second abutment surface 118. The heights of the first abutment surface 117 and the second abutment surface 118 are different, which can realize the height adjustment of the air duct adjustment pipe. When the height of the air duct adjustment pipe is higher, the air outlet 112 corresponds to the position of the first air duct 632. When the height of the air duct adjustment pipe is lower, the air outlet 112 corresponds to the position of the second air duct 633, thereby realizing the switching of different air ducts.

[0045] In order to ensure smooth movement of the air duct regulating pipe, at least two through holes 622 are provided, and the push rod 113 and the push device are provided corresponding to the through holes 622.

[0046] To achieve different air supply methods, the first air duct 632 is shaped like a Venturi tube.

[0047] To achieve efficient air delivery, multiple air outlets 112 are provided, and the multiple air outlets 112 are evenly distributed around the circumference of the pipe body 111.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Unless otherwise specified, an element defined by the phrase "comprising..." or "including..." does not exclude the presence of additional elements in the process, method, article, or terminal device that includes said element. Additionally, in this document, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number; "above," "below," "within," etc., are understood to include the stated number.

[0049] The above description of the embodiments is provided to facilitate understanding and use of the present invention by those skilled in the art. It is obvious to those skilled in the art that various modifications can be easily made to the embodiments, and the general principles described herein can be applied to other embodiments without creative effort. Therefore, the present invention is not limited to the above embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A sintering vertical cooling device equipped with multi-stage air caps, characterized in that, The system includes a feed hopper, a vertical cooling tank, a primary central air supply device, a secondary central air supply device, a peripheral air supply device, and a discharge device. The vertical cooling tank is divided into a pre-cooling section, a cooling section, and a discharge hopper from top to bottom. The pre-cooling section is equipped with a hot air outlet pipe. The feed hopper is located at the top of the pre-cooling section, and the discharge device is located at the bottom of the discharge hopper. The primary central air supply device is positioned corresponding to the cooling section, and the peripheral air supply device is also positioned corresponding to the cooling section and located below the primary central air supply device. The secondary central air supply device is positioned corresponding to the discharge hopper. Both the primary and secondary central air supply devices include air supply pipes, air caps, and adjusting components. The air supply pipes include a horizontal section and a vertical section. The vertical cooling tank is divided into two sections: a transverse section that traverses the vertical cooling tank, and a longitudinal section that connects the transverse section. The wind cap includes a cap body and a support rod. The cap body covers the longitudinal section, and the upper end of the support rod is connected to the cap body. The adjustment assembly includes a support base, a drive chain, a sprocket, and a vibration adjustment plate. The drive chain traverses the transverse section, the support base is located in the transverse section, the sprocket is located on the support base and cooperates with the drive chain, the vibration adjustment plate is horizontally arranged and coaxially arranged with the sprocket, and the vibration adjustment plate is provided with an eccentrically arranged vibration abutment. The support rod passes through the longitudinal section, and its lower end abuts against the vibration adjustment plate and corresponds to the movement path of the vibration abutment. The adjustment assembly further includes an air duct adjustment pipe and a support device. The bottom of the cap body has a slot, into which the support rod is inserted. The side of the slot has a first air duct and a second air duct connecting to the bottom of the cap body. The first air duct is located above the second air duct. The top of the longitudinal section has an annular guide groove, and the bottom of the annular guide groove has a through hole. The air duct adjustment pipe includes a pipe body and a support rod. The lower part of the pipe body is inserted into the annular guide groove. The support rod is connected to the bottom of the pipe body and passes through the through hole. The side of the pipe body has an air outlet, and the side wall of the pipe body fits against the... The side wall of the slot, the abutting device includes a vertical shaft and an adjusting wheel. The vertical shaft is mounted on the support base, and the adjusting wheel is horizontally mounted on the vertical shaft. The top of the adjusting wheel has a first abutting surface and a second abutting surface. The position of the first abutting surface is higher than that of the second abutting surface. There is an arc transition between the first abutting surface and the second abutting surface. The lower end of the abutting rod abuts against the adjusting wheel. The circumference of the adjusting wheel is tangent to the side of the vibration adjustment disk. The side of the adjusting wheel has a notch. The side of the vibration adjustment disk has an inclined paddle for unidirectional paddle movement of the adjusting wheel.

2. The sintering vertical cooling device with multi-stage air caps according to claim 1, characterized in that, Multiple vibrating abutments are provided, and the multiple vibrating abutments are evenly distributed around the central circumference of the vibration adjustment disc.

3. The sintering vertical cooling device with multi-stage air caps according to claim 1, characterized in that, The vibration adjustment plate has an adjustment cavity with an opening at the top. The vibration abutment is located in the adjustment cavity and protrudes from the upper surface of the vibration adjustment plate through the opening. The adjustment cavity has a movable block located on the side of the vibration abutment close to the axis of the vibration adjustment plate.

4. The sintering vertical cooling device with multi-stage air caps according to claim 3, characterized in that, The top and bottom edges of the vibrating abutment are provided with arc-shaped chamfers, and the top edge of the movable block is also provided with arc-shaped chamfers.

5. A sintering vertical cooling device with multi-stage air caps as described in claim 1, characterized in that, The feeder is configured as a single-roller feeder.

6. The sintering vertical cooling device with multi-stage air caps according to claim 1, characterized in that, The peripheral air supply device includes a first peripheral air supply pipe and a second peripheral air supply pipe, which are connected to the side of the vertical cooling tank.

7. A sintering vertical cooling device with multi-stage air caps as described in claim 1, characterized in that, At least two through holes are provided, and the abutting rod and the abutting device are provided corresponding to the through holes.

8. A sintering vertical cooling device with multi-stage air caps as described in claim 1, characterized in that, The first air duct is shaped like a Venturi tube.

9. A sintering vertical cooling device with multi-stage air caps as described in claim 1, characterized in that, The air outlet is provided in multiple ways, and the multiple air outlets are evenly distributed around the circumference of the pipe body.

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