Rotary kiln waste heat collecting device
By installing a waste heat collection device on the rotary kiln chimney, heat is collected and transferred inside and outside the chimney using a heat-conducting medium, thus solving the problem of waste heat loss from chimney exhaust and achieving efficient utilization of waste heat and effective heat transfer.
Patent Information
- Application Number
- CN202520228578.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-13
AI Technical Summary
Rotary kiln chimneys cause a large amount of waste heat to be lost when exhausting flue gas, resulting in heat waste and reduced heat utilization.
A rotary kiln waste heat collection device is adopted, including first and second collection mechanisms and a liquid storage mechanism. Heat is collected and transferred inside and outside the chimney through a heat transfer medium, and the waste heat is effectively utilized by the liquid storage mechanism.
It improves the utilization rate of waste heat, reduces waste heat loss and waste, lowers the risk of damage to the collection mechanism, is applicable to chimneys of different thicknesses, and improves the applicability of the device and the efficiency of heat transfer.
Smart Images
Figure CN223896596U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of rotary kiln waste heat treatment technology, and in particular to a rotary kiln waste heat collection device. Background Technology
[0002] Rotary kilns refer to kilns that rotate to calcine. Based on the types of materials they process, they can be divided into cement rotary kilns used for calcining cement clinker, metallurgical chemical kilns used in the metallurgical industry, and lime kilns used for roasting lime and dolomite.
[0003] When a rotary kiln is in use, the flue gas generated during the calcination process needs to be discharged from the kiln body. Currently, the flue gas is generally discharged directly through a chimney.
[0004] However, since the high temperature during the calcination process is discharged from the chimney along with the flue gas, a large amount of residual heat is lost when the chimney discharges the flue gas, resulting in heat waste and making it difficult to improve heat utilization and control costs.
[0005] Regarding the aforementioned technologies, the inventors believe that there is a drawback in the rotary kiln's chimney, which causes significant heat loss when emitting flue gas. Utility Model Content
[0006] In order to improve the problem of excessive heat loss when flue gas is discharged from the chimney of a rotary kiln, this application provides a rotary kiln waste heat collection device.
[0007] The rotary kiln waste heat collection device provided in this application adopts the following technical solution:
[0008] A rotary kiln waste heat collection device is installed on the chimney of a rotary kiln. The rotary kiln waste heat collection device includes: a first collection mechanism, which is installed inside the chimney and includes an input end and an output end; a second collection mechanism, which is located outside the chimney and includes a first end and a second end, the first end of which is connected to the input end of the first collection mechanism; and a liquid storage mechanism, which includes a first liquid outlet and a first liquid inlet, the first liquid outlet being connected to the second end of the second collection mechanism and the first liquid inlet being connected to the output end of the first collection mechanism.
[0009] By adopting the above technical solution, the interior of the chimney is used for flue gas and heat discharge, and the heat is relatively high. Therefore, the first collection mechanism is heated inside the chimney, and the second collection mechanism is heated outside the chimney, improving the utilization rate of waste heat and ensuring that the heat lost inside and outside the chimney can be effectively collected. The liquid storage mechanism is used to transport liquid heat-conducting medium to the first and second collection mechanisms, so as to transfer the heat inside and outside the chimney to the heat-conducting medium, and further realize the utilization of waste heat through the flow of the heat-conducting medium. The heat-conducting medium flows into the second collection mechanism through the first outlet of the liquid storage mechanism, and then flows into the first collection mechanism through the first end of the second collection mechanism. In the collection mechanism, the heat is ultimately transferred from the output end of the first collection mechanism back to the storage mechanism, thus facilitating the utilization of the rotary kiln's waste heat through the heated heat transfer medium in the storage mechanism, reducing heat loss and waste. Since the temperature inside the chimney is higher than that outside the chimney, the heat transfer medium first passes through the lower-temperature second collection mechanism and then through the higher-temperature first collection mechanism, which helps to gradually increase the temperature of the heat transfer medium. This not only reduces the damage to the first and second collection mechanisms due to excessive temperature differences, but also optimizes the heating effect of the heat transfer medium and makes reasonable use of the waste heat of the rotary kiln chimney.
[0010] Optionally, the input end and the output end of the first collecting mechanism are located on opposite sides of the axis of the chimney.
[0011] By adopting the above technical solution, the input and output ends of the first collection mechanism are circumferentially misaligned, reducing the risk of interference; and it helps to make the two parts of the structure between the input and output ends symmetrical about the input and output ends, so that the lengths of the two parts of the structure are similar, thus alleviating the problem of poor absorption of waste heat caused by the short flow path of the heat transfer medium inside the chimney.
[0012] Optionally, the first collection mechanism is provided with a plurality of lifting components, one end of which is connected to the chimney and the other end of which is connected to the first collection mechanism.
[0013] By adopting the above technical solution, it is possible to reliably install the first collection mechanism on the chimney, reducing the risk of it falling.
[0014] Optionally, it also includes a connecting mechanism, which connects the first collecting mechanism and the second collecting mechanism respectively. The length of the connecting mechanism is adjustable, and the connecting mechanism is mounted on the top end face of the chimney.
[0015] By adopting the above technical solution, the connecting mechanism serves two purposes: firstly, it connects the first collecting mechanism and the second collecting mechanism; secondly, since the connecting mechanism is mounted on the top end face of the chimney, it can also mount the first collecting mechanism and the second collecting mechanism on the chimney; the length of the connecting mechanism is adjustable, making it suitable for chimneys of different thicknesses and improving its applicability.
[0016] Optionally, both the first collecting mechanism and the second collecting mechanism are detachably connected to the connecting mechanism.
[0017] By adopting the above technical solution, the applicable chimney thickness after the first and second collecting mechanisms are connected can be further adjusted based on the telescopic nature of the connecting mechanism. The applicable range can be increased by replacing the connecting mechanism.
[0018] Optionally, it also includes a cover, which is disposed on the side of the second collecting mechanism away from the chimney, such that the second collecting mechanism is located between the chimney and the cover.
[0019] By adopting the above technical solution, the cover provides protection for the second collection mechanism, reducing the risk of damage to the second collection mechanism. On the other hand, the cover reduces heat loss outside the chimney, making the waste heat collection effect of the second collection mechanism better and improving the collection efficiency of waste heat from the rotary kiln.
[0020] Optionally, the cover is circumferentially spaced from the second collecting mechanism, and the cover is provided with a heat-insulating member on the side near the second collecting mechanism, the heat-insulating member being flexible.
[0021] By adopting the above technical solution, the effect of preventing heat loss on the outside of the chimney is optimized, and the possibility of the second collection mechanism being damaged due to scratches between the cover and the second collection mechanism is reduced by using flexible insulation components.
[0022] Optionally, the liquid storage mechanism includes an inlet layer and an outlet layer, with the inlet layer located below the outlet layer and the inlet layer and the outlet layer spaced apart.
[0023] By adopting the above technical solution, the unheated heat transfer medium can be separated from the heat transfer medium that is heated after flowing through the chimney, thereby reducing the influence of the unheated heat transfer medium on the heated heat transfer medium and maintaining the temperature of the heated heat transfer medium.
[0024] Optionally, the outer periphery of the liquid outlet layer is provided with a heat insulation layer.
[0025] By adopting the above technical solution, the temperature of the heated heat transfer medium can be maintained, thereby improving the utilization efficiency of waste heat.
[0026] Optionally, the liquid storage mechanism is further provided with a second liquid inlet and a second liquid outlet, wherein the first liquid outlet and the second liquid inlet are both connected to the liquid inlet layer, and the first liquid inlet and the second liquid outlet are both connected to the liquid outlet layer.
[0027] By adopting the above technical solution, it is possible to input external heat-conducting medium into the liquid layer, and further input it into the second collection mechanism and the first collection mechanism to absorb residual heat. Then, it flows to the liquid outlet layer and outputs the heated heat-conducting medium through the liquid outlet layer so as to utilize the heat of the heat-conducting medium.
[0028] In summary, this application includes at least one of the following beneficial technical effects:
[0029] 1. The interior of the chimney is used for the discharge of flue gas and heat, and the heat level is relatively high. Therefore, the first collection mechanism heats the inside of the chimney, while the second collection mechanism heats the outside of the chimney, improving the utilization rate of waste heat and ensuring that the heat lost from both inside and outside the chimney is effectively collected. The liquid storage mechanism is used to supply liquid heat-conducting medium to the first and second collection mechanisms, so as to transfer the heat from inside and outside the chimney to the heat-conducting medium, and further realize the utilization of waste heat through the flow of the heat-conducting medium. The heat-conducting medium flows into the second collection mechanism through the first outlet of the liquid storage mechanism, and then flows into the first collection mechanism through the first end of the second collection mechanism. In the process, the heat is finally returned to the liquid storage mechanism from the output end of the first collection mechanism, thereby transferring heat to the liquid storage mechanism. This facilitates the utilization of the waste heat of the rotary kiln by using the heated heat transfer medium in the liquid storage mechanism, reducing waste heat loss and waste. Since the temperature inside the chimney is higher than that outside the chimney, the heat transfer medium first passes through the lower-temperature second collection mechanism and then through the higher-temperature first collection mechanism. This helps the temperature of the heat transfer medium to gradually rise, which not only reduces the damage to the first and second collection mechanisms due to excessive temperature difference, but also optimizes the heating effect of the heat transfer medium and makes reasonable use of the waste heat of the rotary kiln chimney.
[0030] 2. The input and output ends of the first collection mechanism are circumferentially misaligned to reduce the risk of interference; and it helps to make the two parts of the structure between the input and output ends symmetrical about the input and output ends, so that the lengths of the two parts of the structure are similar, thus alleviating the problem of poor absorption of waste heat caused by the short flow path of the heat transfer medium inside the chimney.
[0031] 3. The connecting mechanism serves two purposes: firstly, it connects the first collecting mechanism with the second collecting mechanism; secondly, since the connecting mechanism is mounted on the top end face of the chimney, it can also support the first collecting mechanism and the second collecting mechanism on the chimney. The length of the connecting mechanism is adjustable, making it suitable for chimneys of different thicknesses and improving its applicability. Attached Figure Description
[0032] Figure 1 This is a schematic diagram showing the interior of the liquid storage mechanism of the rotary kiln waste heat collection device according to an embodiment of this application.
[0033] Figure 2 This is a schematic diagram of the first collection mechanism, the second collection mechanism, and the chimney in accordance with an embodiment of this application.
[0034] Figure 3 This is a schematic diagram showing the connection between the first collection mechanism and the second collection mechanism in an embodiment of this application.
[0035] Figure 4 This is a schematic diagram of the cover according to an embodiment of this application.
[0036] Explanation of reference numerals in the attached figures:
[0037] 100. Chimney;
[0038] 1. First collecting mechanism; 11. Input end; 12. Output end;
[0039] 2. Second collection mechanism; 21. First end; 22. Second end;
[0040] 3. Liquid storage mechanism; 31. First liquid outlet; 32. First liquid inlet; 33. Second liquid inlet; 34. Second liquid outlet; 35. Liquid inlet layer; 36. Liquid outlet layer;
[0041] 4. Lifting components; 5. Connecting mechanism; 6. Cover. Detailed Implementation
[0042] The following is in conjunction with the appendix Figure 1 - Appendix Figure 4 This application will be further described in detail below. In this embodiment, unless otherwise specified, "connection," "linked," and "fixed" are interpreted broadly, including fixed connections, detachable connections, connections forming an integral structure, mechanical connections, electrical connections, direct connections, indirect connections via intermediaries, internal connections, and interactions between two components, etc., and can be understood according to the specific circumstances. Unless otherwise stated, directional terms such as "inner" and "outer" used in this application refer to the outline of the corresponding component itself.
[0043] like Figure 1 and Figure 2 As shown in the embodiment of this application, a rotary kiln waste heat collection device (hereinafter referred to as the "device") is disclosed. The device is installed on the chimney 100 of the rotary kiln. The device includes a first collection mechanism 1, a second collection mechanism 2 and a liquid storage mechanism 3, which are used to collect heat inside and outside the chimney 100 to realize the utilization of the waste heat of the rotary kiln.
[0044] The first collection mechanism 1 is installed inside the chimney 100, and includes an input end 11 and an output end 12. The second collection mechanism 2 is located outside the chimney 100, and includes a first end 21 and a second end 22. Both the first collection mechanism 1 and the second collection mechanism 2 can be tubular structures, with a liquid heat-conducting medium, such as water, oil, or other liquid, inside. The heat-conducting medium flows through the chimney 100 and is heated, thus collecting the waste heat of the rotary kiln. The heated heat-conducting medium then flows to the structure to be heated, such as a boiler or heat exchanger, to utilize the waste heat and reduce heat loss and waste. Since the interior of the chimney 100 is used to discharge flue gas and heat, and the heat level is relatively high, the first collection mechanism 1 being heated inside the chimney 100 and the second collection mechanism 2 being heated outside the chimney 100 can improve the utilization rate of waste heat, ensuring that the heat lost both inside and outside the chimney 100 is effectively collected.
[0045] like Figure 1 and Figure 2 As shown, the liquid storage mechanism 3 includes a first outlet 31 and a first inlet 32. The first outlet 31 is connected to the second end 22 of the second collection mechanism 2, the first end 21 of the second collection mechanism 2 is connected to the input end 11 of the first collection mechanism 1, and the output end 12 of the first collection mechanism 1 is connected to the first inlet 32. This allows the heat transfer medium to flow between the liquid storage mechanism 3, the second collection mechanism 2, and the first collection mechanism 1, transferring heat from inside and outside the chimney 100 to the liquid storage mechanism 3 for use. The liquid storage mechanism 3 can be a box structure, storing the heat transfer medium inside.
[0046] Since the temperature inside the chimney 100 is higher than that outside the chimney 100, the heat transfer medium first passes through the second collection mechanism 2 with a lower temperature and then through the first collection mechanism 1 with a higher temperature. This helps to gradually increase the temperature of the heat transfer medium, which not only reduces the damage to the first collection mechanism 1 and the second collection mechanism 2 due to excessive temperature difference, but also optimizes the heating effect of the heat transfer medium, makes reasonable use of the waste heat of the rotary kiln chimney 100, and improves the waste heat collection and utilization rate.
[0047] like Figures 1-3As shown, the input end 11 and output end 12 of the first collecting mechanism 1 are respectively located on both sides of the axis of the chimney 100, so that the input end 11 and output end 12 of the first collecting mechanism 1 are circumferentially misaligned, reducing the risk of interference. In this embodiment, the input end 11 and output end 12 are symmetrically located on both sides of the axis of the chimney 100, which helps to make the lengths of the two tubular structures between the input end 11 and the output end 12 the same, alleviating the problem of poor absorption of waste heat caused by the short flow path of the heat transfer medium inside the chimney 100; and, making the heating degree of the two tubular structures consistent can avoid the reliability of the first collecting mechanism 1 being affected by the temperature difference. In this embodiment, the first collecting mechanism 1 is a continuous S-shaped structure to extend the heating length of the tubular structure; the first collecting mechanism 1 is located close to the inner wall of the chimney 100 to optimize the waste heat collection effect without affecting the exhaust function of the chimney 100.
[0048] like Figures 1-3 As shown, the device also includes a connecting mechanism 5, which connects the first collecting mechanism 1 and the second collecting mechanism 2. The connecting mechanism 5 can be a connecting pipe, with its two ends connected to the first end 21 and the input end 11, respectively. The connecting mechanism 5 is mounted on the top end face of the chimney 100, thus, after reliably connecting the first collecting mechanism 1 and the second collecting mechanism 2, it can effectively support the first collecting mechanism 1 and the second collecting mechanism 2 on the chimney 100, improving installation stability. The length of the connecting mechanism 5 is adjustable; it can be a telescopic tube structure, making it suitable for chimneys 100 of different thicknesses and improving the applicability of the device. It is understood that the output end 12 and the first liquid inlet 32 can also be connected via the connecting mechanism 5.
[0049] Both the first collecting mechanism 1 and the second collecting mechanism 2 are detachably connected to the connecting mechanism 5. This allows for further adjustment of the chimney thickness 100 that can be accommodated after the first collecting mechanism 1 and the second collecting mechanism 2 are connected, based on the telescoping of the connecting mechanism 5. This facilitates expanding the applicability of the device by replacing the connecting mechanism 5. Specific detachable connection methods include, but are not limited to, screw connection, snap-fit connection, and sleeve connection.
[0050] like Figure 2 and Figure 3As shown, the first collecting mechanism 1 is equipped with several lifting components 4. One end of each lifting component 4 is connected to the chimney 100, and the other end is connected to the first collecting mechanism 1. The lifting component 4 can be an S-shaped structure, with one end hooked to the chimney 100 and the other end hooked to the first collecting mechanism 1. Alternatively, the lifting component 4 can be a ring-shaped structure with an opening, connecting to the chimney 100 through the end of the opening, and the portion of the ring-shaped structure away from the opening fitting over the first collecting mechanism 1, thereby fixing the first collecting mechanism 1 to the chimney 100. The installation of the lifting components 4 helps to reliably install the first collecting mechanism 1 on the chimney 100, reducing the risk of the first collecting mechanism 1 falling. The lifting components 4 and the chimney 100 can be fixed together using bolts or screws, improving the stability of the installation.
[0051] like Figures 2-4 As shown, the device also includes a cover 6, which covers the side of the second collecting mechanism 2 away from the chimney 100, positioning the second collecting mechanism 2 between the chimney 100 and the cover 6. The cover 6 can be two semi-circular structures that fit together to cover the outer periphery of the chimney 100; or it can be a cylindrical structure. The cover 6 serves two purposes: firstly, it provides protection for the second collecting mechanism 2, reducing the risk of damage; secondly, it reduces heat loss from the outside of the chimney 100, improving the waste heat collection efficiency of the second collecting mechanism 2 and enhancing the overall waste heat collection efficiency of the rotary kiln. The upper end of the cover 6 can be hooked to the top of the chimney 100 or fixed using bolts or other structures, ensuring reliable installation of the cover 6 on the chimney 100.
[0052] like Figure 1 , Figure 2 and Figure 4 As shown, the casing 6 and the second collecting mechanism 2 are circumferentially spaced, forming a cavity between them to optimize the effect of preventing heat loss from the exterior of the chimney 100. A base is provided at the lower end of the casing 6, thus forming a cavity with the chimney 100 while preventing the second collecting mechanism 2 from accidentally falling and causing safety hazards, thereby limiting the descent of the second collecting mechanism 2. An insulation component is provided on the side of the casing 6 near the second collecting mechanism 2. This flexible insulation component reduces the possibility of scratching and damaging the second collecting mechanism 2, ensuring its reliability, preventing leakage of the heat transfer medium, and optimizing the collection of residual heat from the chimney 100. The insulation component can be made of materials such as plastic foam, aerogel, or polystyrene board; a suitable material can be selected according to the needs.
[0053] like Figure 1As shown, the liquid storage mechanism 3 includes an inlet layer 35 and an outlet layer 36. The inlet layer 35 stores unheated heat-conducting medium at a lower temperature; the outlet layer 36 stores heat-conducting medium that absorbs waste heat from the chimney 100 at a higher temperature. Positioning the inlet layer 35 below the outlet layer 36 reduces the contact between the heat generated by the higher-temperature heat-conducting medium and the lower-temperature inlet layer 35 during upward evaporation, thus reducing the impact of the lower-temperature inlet layer 35 on the temperature of the outlet layer 36 and ensuring reliable waste heat transfer and application. The inlet layer 35 and outlet layer 36 are spaced apart to separate the unheated heat-conducting medium from the heated heat-conducting medium flowing through the chimney 100, further reducing the impact of the unheated medium on the temperature of the heated medium and maintaining the temperature of the heated medium.
[0054] A cavity is provided between the inlet layer 35 and the outlet layer 36 to optimize the separation effect and reduce the impact on the temperature of the outlet layer 36. An insulation layer is provided around the outer periphery of the outlet layer 36. This insulation layer can be located on the circumferential sidewalls of the outlet layer 36, or it can be located on the circumferential sidewalls, bottom, and top of the outlet layer 36 to optimize the insulation effect, maintain the temperature of the heated heat transfer medium, and improve the efficiency of waste heat utilization. The insulation layer can be a foam board, adhered to the outer periphery of the outlet layer 36.
[0055] like Figure 1 As shown, the liquid storage mechanism 3 is also provided with a second liquid inlet 33 and a second liquid outlet 34. Both the first liquid outlet 31 and the second liquid inlet 33 are connected to the liquid inlet layer 35, and both the first liquid inlet 32 and the second liquid outlet 34 are connected to the liquid outlet layer 36. When using this device, external heat-conducting medium is input into the liquid inlet layer 35, and further input into the second collection mechanism 2 and the first collection mechanism 1 to absorb waste heat. It then flows to the liquid outlet layer 36, through which the heated heat-conducting medium is output, so that the heat of the heat-conducting medium can be utilized. It is understood that the device includes the necessary pump body to drive the flow of the heat-conducting medium; the device also includes multiple pipelines and several valves. The pipelines connect the various parts, allowing the heat-conducting medium to flow in the device. The valves open and close different pipelines, thereby controlling the flow between the various mechanisms. The length of the pipelines and the position of the liquid storage mechanism 3 can be set as needed. Insulation layers can be provided on the casing 6, liquid storage mechanism 3, and other structures of the device to optimize the waste heat collection and insulation effects.
[0056] The implementation principle of a rotary kiln waste heat collection device in this application embodiment is as follows: Taking water as the heat transfer medium, cold water is input into the inlet layer 35 through the second inlet 33. Driven by the pump, it enters the second collection mechanism 2 through the first outlet 31 and further flows into the first collection mechanism 1. When the chimney 100 discharges flue gas, the inside and outside of the chimney 100 have waste heat from the rotary kiln calcination. Therefore, the heat inside and outside the chimney 100 can be absorbed through the first collection mechanism 1 and the second collection mechanism 2. Then, the heated hot water flows to the outlet layer 36 through the first inlet 32, so that it can flow to the structure to be heated through the second outlet 34, thereby realizing the utilization of the waste heat of the chimney 100.
[0057] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A rotary kiln waste heat collection device, characterized in that, The rotary kiln waste heat collection device, installed on the chimney (100) of the rotary kiln, includes: The first collection mechanism (1) is installed inside the chimney (100) and includes an input end (11) and an output end (12). The second collection mechanism (2) is located outside the chimney (100). The second collection mechanism (2) includes a first end (21) and a second end (22). The first end (21) of the second collection mechanism (2) is connected to the input end (11) of the first collection mechanism (1). The liquid storage mechanism (3) includes a first liquid outlet (31) and a first liquid inlet (32). The first liquid outlet (31) is connected to the second end (22) of the second collection mechanism (2), and the first liquid inlet (32) is connected to the output end (12) of the first collection mechanism (1).
2. The rotary kiln waste heat collection device according to claim 1, characterized in that, The input end (11) and the output end (12) of the first collecting mechanism (1) are respectively located on both sides of the axis of the chimney (100).
3. The rotary kiln waste heat collection device according to claim 1, characterized in that, The first collection mechanism (1) is provided with a plurality of lifting components (4), one end of the lifting component (4) is connected to the chimney (100), and the other end of the lifting component (4) is connected to the first collection mechanism (1).
4. The rotary kiln waste heat collection device according to claim 1, characterized in that, It also includes a connecting mechanism (5), which connects the first collecting mechanism (1) and the second collecting mechanism (2) respectively. The length of the connecting mechanism (5) is adjustable, and the connecting mechanism (5) is mounted on the top end face of the chimney (100).
5. The rotary kiln waste heat collection device according to claim 4, characterized in that, Both the first collecting mechanism (1) and the second collecting mechanism (2) are detachably connected to the connecting mechanism (5).
6. The rotary kiln waste heat collection device according to claim 1, characterized in that, It also includes a cover (6), which covers the second collection mechanism (2) on the side away from the chimney (100), so that the second collection mechanism (2) is located between the chimney (100) and the cover (6).
7. The rotary kiln waste heat collection device according to claim 6, characterized in that, The cover (6) and the second collection mechanism (2) are circumferentially spaced apart. The cover (6) is provided with a heat insulation component on the side of the cover (6) close to the second collection mechanism (2). The heat insulation component is flexible.
8. The rotary kiln waste heat collection device according to claim 1, characterized in that, The liquid storage mechanism (3) includes an inlet layer (35) and an outlet layer (36). The inlet layer (35) is located below the outlet layer (36), and the inlet layer (35) and the outlet layer (36) are spaced apart.
9. The rotary kiln waste heat collection device according to claim 8, characterized in that, The outer periphery of the liquid outlet layer (36) is provided with a heat insulation layer.
10. The rotary kiln waste heat collection device according to claim 8, characterized in that, The liquid storage mechanism (3) is also provided with a second liquid inlet (33) and a second liquid outlet (34). The first liquid outlet (31) and the second liquid inlet (33) are both connected to the liquid inlet layer (35), and the first liquid inlet (32) and the second liquid outlet (34) are both connected to the liquid outlet layer (36).