Air cooling wall of double-chamber lime kiln

Abstract

The utility model provides a double-chamber lime kiln air cooling wall which comprises an annular shell, an annular cooling cavity is formed in the annular shell, and a plurality of cooling units are arranged in the annular cooling cavity. The cooling unit comprises a plurality of gas guide partition plates, the plurality of gas guide partition plates are arranged at intervals in the annular direction of the annular shell, and every two adjacent gas guide partition plates are arranged in a staggered mode in the height direction, so that an S-shaped cooling channel is formed between the gas guide partition plates; an air inlet and an air outlet corresponding to each cooling unit are formed in the annular shell, and the air inlets are formed in the upstream ends of the S-shaped cooling channels; and the air outlet is arranged at the downstream end of the S-shaped cooling channel. The cooling units work independently and do not affect each other, so that when one cooling unit is blocked, normal work of the other cooling units is not affected, the overall temperature of the annular shell and the kiln wall of the lime kiln is not increased, shutdown overhaul is not needed, the maintenance and operation cost is reduced, and economic benefits are improved.

Description

Technical Field

[0001] This utility model relates to the field of lime kiln technology, specifically to a double-chamber lime kiln air-cooled wall. Background Technology

[0002] A lime kiln is an industrial equipment used to calcine limestone. Through high-temperature calcination, limestone decomposes into quicklime. Lime kilns are classified into various types, such as double-chamber kilns, rotary kilns, and sleeve kilns. Double-chamber lime kilns, compared to other types, have advantages such as lower heat consumption and higher product quality. Based on the channel structure, they are generally divided into two types: corbel-type and air-cooled wall-type double-chamber lime kilns. Due to their structural limitations, corbel-type lime kilns require regular cleaning of the channels to prevent blockages, typically requiring a shutdown for cleaning every two weeks, thus affecting production efficiency and product quality. Furthermore, with the increasing demand for double-chamber lime kiln equipment in China, there is a growing need for kilns with a daily capacity of 800 tons / day or even larger. Corbel-type lime kilns, limited by their structural design, are difficult to scale up, while air-cooled wall-type double-chamber lime kilns are more suitable for large-scale production.

[0003] The existing double-chamber lime kiln cooling wall uses a spiral cooling channel surrounding the lime kiln to cool the outer wall of the lime kiln. The problem with this type of cooling wall is that if any part of the spiral cooling channel becomes blocked, it will cause the entire spiral cooling channel to become blocked. If it is not dealt with in time, it will easily lead to the failure of the cooling wall and cause the outer wall of the lime kiln to burn during operation.

[0004] In summary, there is an urgent need for a double-chamber lime kiln air-cooled wall to solve or at least partially solve the problems existing in the prior art. Utility Model Content

[0005] The purpose of this utility model is to provide an air-cooled wall for a double-chamber lime kiln, aiming to solve the problem of overheating of the entire outer wall of the double-chamber lime kiln caused by blockage of the spiral cooling channel. The specific technical solution is as follows:

[0006] A double-chamber lime kiln air-cooled wall includes an annular shell with an annular cooling chamber coaxially arranged inside. Multiple cooling units are arranged within the annular cooling chamber, circumferentially along the shell. Each cooling unit includes multiple air guide baffles, spaced apart circumferentially within the annular cooling chamber. Both sides of each baffle are fixedly connected to the inner wall of the annular cooling chamber. Adjacent baffles are staggered along their height to form an S-shaped cooling channel. The annular shell also has multiple sets of air inlets and outlets, each set corresponding to a cooling unit. The air inlet is located at the upstream end of the S-shaped cooling channel and is connected to it. The air outlet is located at the downstream end of the S-shaped cooling channel and is also connected to it.

[0007] Furthermore, the air inlet and air outlet are located at the upper end of the annular shell.

[0008] Furthermore, the cooling unit also includes a first airflow disturbance device, which is mounted on the air guide baffle and arranged in the S-shaped cooling channel to disturb the airflow in the S-shaped cooling channel.

[0009] Furthermore, the first turbulence device includes a first turbulence plate and a second turbulence plate. The first turbulence plate is fixedly connected to the side wall of the air guide baffle and extends toward the S-shaped cooling channel. The second turbulence plate is fixedly connected to the side wall of the air guide baffle and extends toward the S-shaped cooling channel. The first turbulence plate and the second turbulence plate are arranged at an angle.

[0010] Furthermore, multiple first spoilers are arranged at intervals along the width direction of the air guide baffle, and a first spoiler channel is formed between two adjacent first spoilers; multiple second spoilers are arranged at intervals along the width direction of the air guide baffle, and a second spoiler channel is formed between two adjacent second spoilers; the extension lines of the first spoiler channel and the extension lines of the second spoiler channel intersect downstream of the S-shaped cooling channel.

[0011] Furthermore, the first turbulence device includes a turbulence rod, the first end of which is fixedly connected to the air guide baffle, the second end of which is cantilevered outward and extends into the S-shaped cooling channel.

[0012] Furthermore, the spoiler is a helical rod.

[0013] Furthermore, the cooling unit is also provided with a connecting channel, the first end of which is connected to the S-shaped cooling channel, and the second end of which is connected to the S-shaped cooling channel in another adjacent cooling unit.

[0014] Furthermore, the cooling unit also includes a second airflow disturbance device, which is mounted on the air guide baffle and arranged in the connecting channel to disturb the airflow in the connecting channel.

[0015] Furthermore, it also includes a toothed connecting plate, which is fixedly connected to the top of the annular shell and is arranged at an angle away from the center of the annular shell.

[0016] The application of the technical solution of this utility model has the following beneficial effects:

[0017] By dividing the annular cooling chamber inside the annular shell into multiple cooling units, these cooling units are arranged circumferentially along the annular shell to cool the annular shell and the corresponding kiln wall of the lime kiln. Each cooling unit receives air from the corresponding air inlet at the upstream end, passes through an S-shaped cooling channel, and then exits from the air outlet at the downstream end. The air entering from the air inlet is cold air, which undergoes heat exchange as it passes through the S-shaped cooling channel, thus cooling the annular shell and the corresponding kiln wall of the lime kiln. Subsequently, the hot air is discharged from the air outlet, thereby cooling the annular shell and the corresponding kiln wall of the lime kiln.

[0018] Each cooling unit operates independently without affecting the others. Therefore, if one cooling unit becomes blocked, it will not affect the normal operation of the remaining cooling units. When a single cooling unit becomes blocked, only a localized temperature rise will occur, without causing an overall temperature increase in the annular shell and the kiln wall of the lime kiln. Therefore, no shutdown maintenance is required, and cooling can be performed on the blocked area individually. Compared to shutdown maintenance, this design allows for temporary localized repairs to the blocked cooling unit, reducing maintenance and operating costs while enabling the lime kiln to continue normal production, thus improving economic efficiency.

[0019] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. These will be described below with reference to... Figures 1-10 The present invention will be described in further detail below. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0021] Figure 1 This is a schematic diagram of Embodiment 1 of the utility model of this application applied to a double-chamber lime kiln air-cooled wall in a double-chamber lime kiln;

[0022] Figure 2 This is a top view of Embodiment 1 of the utility model of a double-chamber lime kiln, applied to a double-chamber lime kiln;

[0023] Figure 3 This is an internal schematic diagram of the cooling unit in Embodiment 1 of the double-chamber lime kiln air-cooled wall of this utility model application;

[0024] Figure 4 This is one of the schematic diagrams showing the positional relationship between the annular shell and the kiln wall of the double-chamber lime kiln in Embodiment 1 of the present utility model.

[0025] Figure 5 This is the second schematic diagram showing the positional relationship between the annular shell and the kiln wall of the double-chamber lime kiln in Embodiment 1 of the present utility model.

[0026] Figure 6 This is a cross-sectional view of the annular shell of Embodiment 1 of the air-cooled wall of a double-chamber lime kiln of this utility model application;

[0027] Figure 7 This is a schematic diagram of the external structure of the annular shell of Embodiment 1 of the air-cooled wall of a double-chamber lime kiln of this utility model application;

[0028] Figure 8 This is a schematic diagram of the internal structure of the annular shell of Embodiment 1 of the air-cooled wall of a double-chamber lime kiln according to the present application;

[0029] Figure 9 This is a schematic diagram of the overall structure of the first turbulence device in Embodiment 1 of the double-chamber lime kiln air-cooled wall of this utility model application;

[0030] Figure 10 This is a schematic diagram of the overall structure of the first turbulence device in Embodiment 2 of the air-cooled wall of a double-chamber lime kiln of this utility model application.

[0031] Among them, 1. Annular shell; 11. Annular cooling chamber; 12. Air inlet; 13. Air outlet; 2. Cooling unit; 21. Air guide baffle; 22. S-shaped cooling channel; 23. First turbulence device; 231. First turbulence plate; 232. Second turbulence plate; 233. First turbulence channel; 234. Second turbulence channel; 24. Turbulence rod; 25. Connecting channel; 26. Second turbulence device; 3. Toothed connecting plate; 4. Support frame; 5. Refractory brick; 6. Preheating section kiln shell. Detailed Implementation

[0032] To facilitate understanding of this invention, a more comprehensive description is provided below, along with preferred embodiments. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this invention.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0034] Example 1:

[0035] See Figures 1-9 This embodiment provides a double-chamber lime kiln air-cooled wall, including an annular shell 1. An annular cooling chamber 11 is coaxially arranged inside the annular shell 1. Multiple cooling units 2 are arranged within the annular cooling chamber 11, circumferentially arranged along the annular shell 1. Each cooling unit 2 includes an air guide baffle 21, with multiple baffles 21 arranged at intervals along the annular shell 1 within the annular cooling chamber 11. Both sides of each baffle 21 are fixedly connected to the inner wall of the annular cooling chamber 11, and adjacent baffles 21 are staggered along the height direction. The air inlet and outlet are arranged such that an S-shaped cooling channel 22 is formed between the air guide baffles 21. An air inlet 12 and an air outlet 13 are also provided on the annular shell 1. One air inlet 12 and one air outlet 13 form a group, and multiple groups of air inlets 12 and air outlets 13 are provided. Each group of air inlets 12 and air outlets 13 is arranged corresponding to a group of cooling units 2. The air inlet 12 is arranged at the upstream end of the S-shaped cooling channel 22 and is connected to the S-shaped cooling channel 22. The air outlet 13 is arranged at the downstream end of the S-shaped cooling channel 22 and is connected to the S-shaped cooling channel 22.

[0036] Understandably, by dividing the annular cooling chamber 11 within the annular shell 1 into multiple cooling units 2, these units are arranged circumferentially along the annular shell 1 to cool the annular shell 1 and the corresponding kiln wall of the lime kiln. Each cooling unit 2 receives air from the upstream air inlet 12, passes through the S-shaped cooling channel 22, and exits from the downstream air outlet 13. The air entering from the air inlet 12 is cold air, which undergoes heat exchange as it passes through the S-shaped cooling channel 22, cooling the annular shell 1 and the corresponding kiln wall of the lime kiln. Subsequently, the hot air is discharged from the air outlet 13, thus cooling the annular shell 1 and the corresponding kiln wall of the lime kiln. It is known that each cooling unit 2 operates independently without affecting others. Therefore, when one cooling unit 2 becomes blocked, it does not affect the normal operation of the other cooling units 2. When a single cooling unit 2 becomes blocked, only a local temperature rise will occur, and it will not cause an overall temperature rise in the annular shell 1 and the kiln wall of the lime kiln. Therefore, there is no need to shut down for maintenance, and the local blockage can be cooled individually. Compared to shutdown for maintenance, the above-mentioned structure only requires temporary local repairs to the single blocked cooling unit 2, reducing maintenance and operating costs while allowing the lime kiln to operate normally and improving economic efficiency.

[0037] Specifically, the reversal points of the S-shaped cooling channel 22 are respectively arranged at the upper or lower end of the annular shell 1. That is, after the cooling air enters from the air inlet 12, it flows downward, then turns back upward after passing the lower reversal point, and then changes to flow downward again after passing the upper reversal point. This process is repeated until it is discharged from the upper air outlet 13.

[0038] Furthermore, the air inlet 12 and the air outlet 13 are located at the upper end of the annular shell 1. The air inlet 12 is connected to the external air supply equipment, which pumps the outside cold air into the air inlet 12. The air outlet 13 is connected to the exhaust pipe and is discharged into the outside atmosphere through the exhaust pipe.

[0039] It is known that, firstly, the lower end of the annular shell 1 is surrounded by kiln bricks, making it inconvenient to set the air inlet 12 and the air outlet 13. Secondly, by setting the air inlet 12 at the upper end, the incoming air is cold air, which is heavier than the hot air discharged from the air outlet 13. When it is set at the upper end, the cold air flows downward more easily, which facilitates the intake of air. When the air outlet 13 is set at the upper end, the outlet 13 is hot air, which is lighter than the cold air entering through the air inlet 12. When it is set at the upper end, the hot air flows upward more easily, which facilitates the exhaust of air.

[0040] Furthermore, the cooling unit 2 also includes a first turbulence device 23, which is mounted on the air guide baffle 21 and arranged in the S-shaped cooling channel 22 to turbulent the airflow in the S-shaped cooling channel 22.

[0041] It should be noted that when air flows in the S-shaped cooling channel 22, it easily generates stable laminar flow. However, this stable laminar flow prevents the heated air near the annular shell 1 from flowing into the interior of the S-shaped cooling channel 22. In other words, the gas at the edge of the S-shaped cooling channel 22 remains at the edge during flow, while the gas inside remains inside, preventing convection. This results in the heated gas at the edge being unable to reach the center, leading to a decrease in the cooling effect on the annular shell 1. During stable laminar flow, heat transfer is the primary mode of heat exchange, resulting in low heat transfer efficiency. However, by incorporating the first turbulence device 23, the stable laminar flow in the S-shaped cooling channel 22 is transformed into turbulent, irregular flow. During turbulent, irregular flow, the airflow in the S-shaped cooling channel 22 is irregular, with thermal convection occurring between the airflows. Heat exchange is primarily through thermal convection, with heat transfer playing a secondary role, significantly improving the heat exchange efficiency.

[0042] It is known that by setting the first turbulence device 23, the first turbulence device 23 disturbs the laminar air flowing in the S-shaped cooling channel 22, transforming the laminar and stable cooling air into turbulent and irregular flow, improving the convection between cooling air, improving the heat exchange efficiency, and enabling the cooling air to carry away more heat, thereby improving the cooling effect on the annular shell 1 and the kiln wall of the lime kiln.

[0043] Furthermore, the first turbulence device 23 includes a first turbulence plate 231 and a second turbulence plate 232. The first turbulence plate 231 is welded and fixedly connected to the side wall of the air guide baffle 21, and the first turbulence plate 231 extends toward the S-shaped cooling channel 22. The second turbulence plate 232 is welded and fixedly connected to the side wall of the air guide baffle 21, and the second turbulence plate 232 extends toward the S-shaped cooling channel 22. The first turbulence plate 231 and the second turbulence plate 232 are arranged at an angle.

[0044] It is known that the cooling air passing through the S-shaped cooling channel 22 is guided by the first baffle 231 and the second baffle 232, causing the cooling air to change its flow direction and become disturbed, thus disrupting the stable laminar flow.

[0045] In some other embodiments of this application, the first spoiler 231 and the second spoiler 232 can still be detachably connected to the air guide baffle 21. The first spoiler 231 and the second spoiler 232 can be arranged perpendicular to the air guide baffle 21 or arranged at an angle to the air guide baffle 21.

[0046] Furthermore, multiple first spoilers 231 are arranged, spaced apart along the width of the air guide baffle 21, forming a first spoiler channel 233 between two adjacent first spoilers 231; multiple second spoilers 232 are arranged, spaced apart along the width of the air guide baffle 21, forming a second spoiler channel 234 between two adjacent second spoilers 232; the extension lines of the first spoiler channel 233 and the second spoiler channel 234 intersect downstream of the S-shaped cooling channel 22.

[0047] It can be seen that the cooling airflow flows from upstream to the first turbulence device 23, and after being processed by the first turbulence device 23, it flows downstream. When passing through the first turbulence channel 233 of the first turbulence device 23, the cooling gas is changed in flow direction, causing the cooling gas passing through the first turbulence channel 233 to flow obliquely towards the side closer to the second turbulence plate 232; when passing through the second turbulence channel 234 of the second turbulence device 26, the cooling gas is changed in flow direction, causing the cooling gas passing through the second turbulence channel 234 to flow obliquely towards the side closer to the first turbulence plate 231; thus, the two cooling airflows converge and convect downstream of the first turbulence device 23, realizing convective flow, increasing the thermal convection of the cooling gas, and achieving the effect of improving heat exchange efficiency.

[0048] It should be noted that multiple first flow disturbance devices 23 are arranged in the S-shaped cooling channel 22 to disturb the cooling airflow in the S-shaped cooling channel 22.

[0049] Furthermore, the cooling unit 2 is also provided with a connecting channel 25. The first end of the connecting channel 25 is connected to the S-shaped cooling channel 22, and the second end of the connecting channel 25 is connected to the S-shaped cooling channel 22 in another adjacent cooling unit 2. Specifically, the connecting channel 25 is arranged at the lower end of the annular shell 1 and is arranged horizontally.

[0050] It is known that the S-shaped cooling channels 22 in two adjacent cooling units 2 are connected by the connecting channel 25. When the S-shaped cooling channel 22 in one of the cooling channels is blocked, the S-shaped connecting channel 25 on the other side can exhaust or intake air for the blocked cooling unit 2.

[0051] Furthermore, the cooling unit 2 also includes a second turbulence device 26, which is mounted on the air guide baffle 21 and arranged in the connecting channel 25 to turbulent the airflow in the connecting channel 25.

[0052] Furthermore, it also includes a toothed connecting plate 3, which is fixedly connected to the top of the annular housing 1 and is arranged at an angle away from the center of the annular housing 1.

[0053] It should be noted that the lime kiln is divided into three sections: a preheating section, a calcination section, and a cooling section, which are arranged sequentially from top to bottom. The annular shell 1 corresponds to the calcination section. Refractory bricks 5 need to be laid inside the annular shell 1, and the upper end of the annular shell 1 is connected to the outer shell of the preheating section. The outer shell of the preheating section kiln is connected to the toothed plate by welding. By setting it as a toothed plate, the edge of the toothed plate increases the welding length, which helps to improve the connection strength between the toothed plate and the outer shell of the third kiln section.

[0054] In addition, a support frame 4 is welded and fixed to the shell of the preheating section, which shares the weight of the kiln shell 6 of the preheating section. The toothed connecting plate 3 is set at an outward 45-degree angle. With this setting, the refractory bricks 5 in the preheating section kiln overlap on the toothed plate, and part of the vertical load of the upper refractory bricks 5 is changed to lateral thrust and distributed to the support frame 4 of the preheating section, thereby reducing the load on the annular shell 1 and the refractory bricks 5 of the annular shell 1, and reducing the risk of equipment damage.

[0055] Example 2:

[0056] See Figure 10 This embodiment provides a double-chamber lime kiln air-cooled wall. The difference between this embodiment and embodiment 1 is that in this embodiment, the first turbulence device 23 includes a turbulence rod 24. The first end of the turbulence rod 24 is fixedly connected to the air guide baffle 21, and the second end of the turbulence rod 24 is cantilevered outward and extends into the S-shaped cooling channel 22. Multiple turbulence rods 24 are arranged, and the multiple turbulence rods 24 are arranged at intervals along the width direction of the air guide baffle 21.

[0057] It is known that after the airflow passes through the turbulence bar 24, the airflow is disturbed, causing the airflow that was originally in a laminar and stable flow state to change into an irregular and turbulent flow state. This improves air convection, increases heat exchange between the air and the annular shell 1, and achieves the purpose of quickly removing heat from the annular shell 1, thereby improving heat exchange efficiency and helping to reduce the temperature of the annular shell 1 and the kiln wall of the lime kiln.

[0058] Furthermore, the baffle rod 24 is a helical rod, which is horizontally arranged in the S-shaped cooling channel 22, and one end of the helical rod is welded to the air guide baffle 21.

[0059] It is known that by setting the turbulence bar 24 as a helical bar, when the airflow blows past the helical bar from the side, the airflow will be guided along different directions of the helical bar under the action of the helical bar, and finally the airflow will change from regular laminar flow to irregular turbulent flow.

[0060] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A double-chamber lime kiln air-cooled wall, characterized in that: It includes an annular shell (1), and an annular cooling cavity (11) is coaxially arranged inside the annular shell (1). Multiple cooling units (2) are arranged in the annular cooling cavity (11), and the multiple cooling units (2) are arranged circumferentially along the annular shell (1). The cooling unit (2) includes air guide baffles (21), and multiple air guide baffles (21) are arranged. The multiple air guide baffles (21) are arranged circumferentially and spaced apart in the annular cooling cavity (11) of the annular shell (1). Both sides of the air guide baffles (21) are fixedly connected to the inner wall of the annular cooling cavity (11). Two adjacent air guide baffles (21) are staggered along the height direction so that an S-shaped cooling channel (22) is formed between the air guide baffles (21). The annular shell (1) is also provided with an air inlet (12) and an air outlet (13). Multiple sets of air inlets (12) and air outlets (13) are provided, and each set of air inlets (12) and air outlets (13) is arranged in correspondence with a set of cooling units (2). The air inlet (12) is located at the upstream end of the S-shaped cooling channel (22), and the air inlet (12) is connected to the S-shaped cooling channel (22); The air outlet (13) is located at the downstream end of the S-shaped cooling channel (22), and the air outlet (13) is connected to the S-shaped cooling channel (22).

2. The air-cooled wall of a double-chamber lime kiln according to claim 1, characterized in that: The air inlet (12) and the air outlet (13) are located at the upper end of the annular housing (1).

3. The air-cooled wall of a double-chamber lime kiln according to claim 1, characterized in that: The cooling unit (2) further includes a first turbulence device (23), which is installed on the air guide baffle (21) and arranged in the S-shaped cooling channel (22) to turbulent the airflow in the S-shaped cooling channel (22).

4. The air-cooled wall of a double-chamber lime kiln according to claim 3, characterized in that: The first turbulence device (23) includes a first turbulence plate (231) and a second turbulence plate (232). The first turbulence plate (231) is fixedly connected to the side wall of the air guide baffle (21), and the first turbulence plate (231) extends toward the S-shaped cooling channel (22). The second spoiler (232) is fixedly connected to the side wall of the air guide baffle (21), and the second spoiler (232) extends toward the S-shaped cooling channel (22). The first spoiler (231) and the second spoiler (232) are arranged at an angle.

5. The air-cooled wall of a double-chamber lime kiln according to claim 4, characterized in that: Multiple first spoilers (231) are arranged, and multiple first spoilers (231) are arranged at intervals along the width direction of the air guide baffle (21), and a first spoiler channel (233) is formed between two adjacent first spoilers (231); Multiple second spoilers (232) are arranged, and multiple second spoilers (232) are arranged at intervals along the width direction of the air guide baffle (21), and a second spoiler channel (234) is formed between two adjacent second spoilers (232); The extension of the first turbulence channel (233) and the extension of the second turbulence channel (234) intersect downstream of the S-shaped cooling channel (22).

6. The air-cooled wall of a double-chamber lime kiln according to claim 3, characterized in that: The first turbulence device (23) includes a turbulence rod (24), the first end of which is fixedly connected to the air guide baffle (21), the second end of which is cantilevered outward and extends into the S-shaped cooling channel (22).

7. The air-cooled wall of a double-chamber lime kiln according to claim 6, characterized in that: The turbulence rod (24) is a helical rod.

8. A double-chamber lime kiln air-cooled wall according to any one of claims 3-6, characterized in that: The cooling unit (2) is also provided with a connecting channel (25), the first end of the connecting channel (25) is connected to the S-shaped cooling channel (22), and the second end of the connecting channel (25) is connected to the S-shaped cooling channel (22) in the adjacent cooling unit (2).

9. The air-cooled wall of a double-chamber lime kiln according to claim 8, characterized in that: The cooling unit (2) further includes a second turbulence device (26), which is mounted on the air guide baffle (21) and arranged in the connecting channel (25) to turbulent the airflow in the connecting channel (25).

10. The air-cooled wall of a double-chamber lime kiln according to claim 9, characterized in that: It also includes a toothed connecting plate (3), which is fixedly connected to the top of the annular shell (1) and is arranged at an angle away from the center of the annular shell (1).

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