Calcination kiln waste heat heating device

Abstract

The utility model relates to a waste heat utilization equipment technical field provides a kind of calcining kiln waste heat heating device, comprising: heat absorption storehouse, heating storehouse and heat conducting pipeline. Heat absorption storehouse is configured to and the outlet of calcining kiln is communicated, to pass into heat absorption storehouse with calcining kiln's haydite. Heating storehouse is set to the top of heat absorption storehouse, for accommodating the material to be heated. Heat conducting pipeline is set between heat absorption storehouse and heating storehouse, and heat conducting pipeline is used to accommodate heat conducting liquid, the heat conducting liquid can flow along heat conducting pipeline, to heat absorption storehouse and heating storehouse between heat transfer and heat the material in heating storehouse. The waste heat heating device of calcining kiln of the utility model, by the circulation flow of heat conducting liquid in heat conducting pipeline, to absorb the heat of high-temperature haydite in heat absorption storehouse and be used to heat the material in heating storehouse, effectively utilize the waste heat of product in calcining kiln, can cooperate calcining kiln and improve the thermal efficiency of entire system, effectively solve the defect that the thermal efficiency of rotary kiln is not high in prior art.

Description

Technical Field

[0001] This utility model relates to the field of waste heat utilization equipment technology, and in particular to a waste heat heating device for calcining kilns. Background Technology

[0002] In related technologies, rotary kilns are typically used for calcination heat treatment of materials such as ceramsite and cement. During the heat treatment process, the furnace temperature of the rotary kiln is relatively high, and the temperature of the heated ceramsite, cement, and other materials is also relatively high. These materials need to be cooled before use, resulting in a significant waste of heat and low overall thermal efficiency of the rotary kiln. Utility Model Content

[0003] This invention provides a waste heat heating device for calcining kilns, which solves the problem of low thermal efficiency in rotary kilns in the prior art.

[0004] This utility model provides a waste heat heating device for calcining kilns, comprising: A heat-absorbing chamber is configured to communicate with the outlet of a calcining kiln to receive ceramsite from the calcining kiln. A heating chamber, located above the heat-absorbing chamber, is used to hold the material to be heated; A heat-conducting pipe is disposed between the heat-absorbing chamber and the heating chamber. The heat-conducting pipe is used to contain the heat-conducting liquid and to absorb the heat from the heat-absorbing chamber to heat the heating chamber.

[0005] The waste heat heating device for calcining kilns according to this utility model further includes: A stirring mechanism is installed inside the heating chamber and is used to stir the materials inside the heating chamber.

[0006] According to the waste heat heating device for calcining kilns of this utility model, the stirring mechanism includes: A driving component is disposed in the heating chamber; A rotating shaft is rotatably disposed within the heating chamber and is connected to the driving component for transmission. A stirring element is disposed on the rotating shaft; the driving element is used to drive the rotating shaft to rotate the stirring element and stir the material.

[0007] According to the waste heat heating device for calcining kilns of this utility model, the heat conduction pipeline includes: The heat absorption pipeline is installed inside the heat absorption chamber; The heat dissipation pipes are attached to the outer wall of the heating chamber; The intermediate pipeline is connected to both the heat absorption pipeline and the heat release pipeline.

[0008] According to the waste heat heating device for calcining kilns of this utility model, the heat absorption chamber contains a connected cylindrical body and a tapering cylinder. The cylindrical body is disposed above the tapered cylinder, and the top of the cylindrical body is provided with a first feed inlet, which is configured to communicate with the outlet of the calcining kiln; the heat absorption pipe is disposed inside the cylindrical body. The tapered cylinder is tapered from top to bottom, and the bottom of the tapered cylinder is provided with a first discharge port that communicates with the storage chamber.

[0009] According to the waste heat heating device for calcining kilns of this utility model, the heat absorption pipeline includes: Multiple sets of first annular tubes are arranged at intervals along the axial direction of the cylindrical body, and each set of first annular tubes includes multiple concentrically arranged first annular tubes. Multiple first connecting pipes, and adjacent concentrically arranged first annular pipes are connected to each other through at least one first connecting pipe; Multiple second connecting pipes are connected to adjacent first annular pipes along the axial direction of the cylindrical body through at least one second connecting pipe.

[0010] According to the waste heat heating device for calcining kilns of this utility model, the heat release pipeline includes: Multiple second annular tubes are sleeved on the outside of the heating chamber, and the multiple second annular tubes are arranged at intervals along the height direction of the heating chamber; Multiple third connecting pipes are provided, and adjacent second annular pipes are connected to each other through at least one of the third connecting pipes.

[0011] The waste heat heating device for calcining kilns according to this utility model further includes: The cover has a heating chamber formed on it. The cover is provided with a second feed port and a second discharge port. The second feed port is connected to the outlet of the calcining kiln to connect the outlet of the calcining kiln and the heating chamber. The second discharge port is used to connect the heat absorption chamber and the heating chamber. The heating chamber is disposed inside the heating chamber.

[0012] According to the waste heat heating device for calcining kilns of this utility model, the heating chamber includes a first cylinder and a second cylinder that are connected to each other; The first cylinder is located above the second cylinder, and the second feed inlet is formed on the side wall of the first cylinder; the heating chamber is disposed in the first cylinder; The second cylinder gradually narrows from top to bottom, and the second discharge port is located at the bottom of the second cylinder.

[0013] The waste heat heating device for calcining kilns according to this utility model further includes: a ceramsite cooling chamber, an air supply and heat exchange device, and a pretreatment device. The ceramsite cooling chamber and the heat absorption chamber are connected, and the ceramsite is used to receive ceramsite from the heat absorption chamber; The air supply and heat exchange device is connected to the ceramsite cooling chamber and is used to supply air to the ceramsite cooling chamber. The pretreatment device is connected to the ceramsite cooling chamber and the heating chamber respectively. The pretreatment device is used to receive hot air from the ceramsite cooling chamber to dry and dehydrate the material to be heated, and to pass the dried and dehydrated material into the heating chamber.

[0014] This utility model discloses a waste heat heating device for a calcining kiln. The heat-absorbing chamber is connected to the outlet of the calcining kiln. The heat-absorbing chamber holds the high-temperature ceramsite heated by the calcining kiln, while the heating chamber, which holds the material to be heated, is positioned above the heat-absorbing chamber. A heat-conducting pipe is installed between the heating chamber and the heat-absorbing chamber. The heat-conducting liquid in the pipe flows from a lower position, heated by the high-temperature ceramsite in the heat-absorbing chamber, to a higher position, where it heats the material in the heating chamber. After cooling, it flows back to the lower position to reabsorb the heat from the ceramsite in the heat-absorbing chamber. Therefore, this utility model's waste heat heating device for a calcining kiln effectively utilizes the waste heat of the products in the calcining kiln by circulating the heat-conducting liquid in the heat-conducting pipe to absorb the heat from the high-temperature ceramsite in the heat-absorbing chamber and use it to heat the material in the heating chamber. This improves the overall thermal efficiency of the system and effectively solves the problem of low thermal efficiency in existing rotary kilns. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the waste heat heating device for calcining kilns provided in this embodiment of the utility model installed in the calcining kiln.

[0017] Figure 2 yes Figure 1 A partial cross-sectional diagram.

[0018] Figure 3 This is a schematic diagram of a waste heat heating device for a calcining kiln installed in a calcining kiln, according to another embodiment of this utility model.

[0019] Figure label: 1. Waste heat heating device for calcining kiln; 2. Calcination kiln; 11. Heat absorption chamber; 111. Cylindrical body; 112. Gradually narrowing cylinder; 12. Heating chamber; 13. Heat conduction pipe; 131. Heat absorption pipe; 1311. First annular pipe; 1312. First connecting pipe; 1313. Second connecting pipe; 132. Heat release pipe; 1321. Second annular pipe; 1322. Third connecting pipe; 133. Intermediate pipe; 14. Stirring mechanism; 15. Cover; 151. Heating chamber; 1511. First cylinder; 1512. Second cylinder; 16. Ceramsite cooling chamber; 17. Air supply and heat exchange device; 18. Pretreatment device. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] The following is combined Figures 1-2 Description of the waste heat heating device for calcining kilns of this utility model like Figure 1 and Figure 2 As shown, in some embodiments, this utility model provides a waste heat heating device 1 for a calcining kiln, comprising: a heat-absorbing chamber 11, a heating chamber 12, and a heat-conducting pipe 13. The heat-absorbing chamber 11 is configured to communicate with the outlet of the calcining kiln 2 to receive ceramsite from the calcining kiln 2. The heating chamber 12 is disposed above the heat-absorbing chamber 11 and is used to contain the material to be heated. The heat-conducting pipe 13 is disposed between the heat-absorbing chamber 11 and the heating chamber 12. The heat-conducting pipe 13 is used to contain a heat-conducting liquid and to absorb heat from the heat-absorbing chamber 11 to heat the heating chamber 12.

[0022] In this embodiment, the waste heat heating device 1 of the calcining kiln can be installed at the outlet of the calcining kiln 2 to utilize the waste heat in the products such as ceramsite after the calcining kiln 2 has finished heating. Specifically, the heat absorption chamber 11 is connected to the outlet of the calcining kiln 2 so that the heated ceramsite can be introduced from the calcining kiln 2 into the heat absorption chamber 11. A portion of the heat conduction pipe 13 is located inside the heat absorption chamber 11 to directly contact and exchange heat with the ceramsite; or, it can be understood that the heat conduction pipe 13 can also be located outside the heat absorption chamber 11 and in contact with the chamber wall of the heat absorption chamber 11 to indirectly exchange heat with the ceramsite through the chamber wall.

[0023] The heat-conducting liquid in the heat-conducting pipe 13 expands after being heated, thus reducing its specific gravity and allowing it to flow upwards along the heat-conducting pipe 13. The heating chamber 12 is located above the heat-absorbing chamber 11. The higher section of the heat-conducting pipe 13 extends into the interior of the heating chamber 12 or contacts its outer wall. The high-temperature heat-conducting liquid in the heat-conducting pipe 13 can heat the material to be heated in the heating chamber 12. After heating, the cooled heat-conducting liquid flows back to the lower position and exchanges heat with the ceramic particles in the heat-absorbing chamber 11.

[0024] The waste heat heating device 1 of this utility model connects the heat absorption chamber 11 and the outlet of the calcining kiln 2. The heat absorption chamber 11 is used to hold the high-temperature ceramsite heated by the calcining kiln 2. The heating chamber 12, which is used to hold the material to be heated, is set above the heat absorption chamber 11. A heat conduction pipe 13 is set between the heating chamber 12 and the heat absorption chamber 11. The heat conduction liquid in the heat conduction pipe 13 can be heated from the high-temperature ceramsite in the heat absorption chamber 11 at the lower position and then flow to the higher position to heat the material in the heating chamber 12 at the higher position. After cooling down, it flows back to the lower position to reabsorb the heat of the ceramsite in the heat absorption chamber 11. As can be seen from the above, the waste heat heating device 1 of the calcining kiln of this utility model absorbs the heat of the high-temperature ceramic particles in the heat absorption chamber 11 through the circulation of the heat transfer liquid in the heat transfer pipe 13 and uses it to heat the material in the heating chamber 12. It effectively utilizes the waste heat of the products in the calcining kiln 2, and can improve the thermal efficiency of the entire system in conjunction with the calcining kiln 2. It effectively solves the defect of low thermal efficiency of rotary kilns in the prior art.

[0025] Specifically, in some embodiments, the heat transfer fluid can be heat transfer oil.

[0026] Alternatively, in some embodiments, such as Figure 1 and Figure 2 As shown, the waste heat heating device 1 of the calcining kiln also includes a stirring mechanism 14, which is installed in the heating chamber 12 and is used to stir the materials in the heating chamber 12.

[0027] In this embodiment, by providing a stirring mechanism 14 inside the heating chamber 12, the stirring mechanism 14 can stir the material inside the heating chamber 12, so that the material can come into full and uniform contact with the heat conduction pipe 13, or through the chamber wall of the heating chamber 12 and the heat conduction pipe 13, so that the material is heated fully and uniformly.

[0028] Specifically, in some embodiments, the stirring mechanism 14 includes a driving member, a rotating shaft, and a stirring member. The driving member is disposed in the heating chamber 12, and the rotating shaft is rotatably disposed within the heating chamber 12 and is drively connected to the driving member. The stirring member is disposed on the rotating shaft. The driving member is used to drive the rotating shaft to rotate the stirring member and stir the material.

[0029] In this embodiment, the drive unit on the heating chamber 12 is connected to the rotating shaft so as to drive the rotating shaft to rotate inside the heating chamber 12, thereby driving the stirring unit on the rotating shaft to rotate. During the rotation, the stirring unit can stir the material inside the heating chamber 12 so that the material moves continuously inside the heating chamber 12, thereby enabling the material to exchange heat with the heat conduction pipe 13 directly or indirectly, and thus enabling the material to be heated fully and evenly.

[0030] Alternatively, the driving component can be a rotary motor.

[0031] Alternatively, the agitator can be a blade structure extending radially outward from the surface of the rotating shaft.

[0032] In some embodiments, such as Figure 1 and Figure 2 As shown, the heat conduction pipe 13 includes a heat absorption pipe 131, a heat release pipe 132, and an intermediate pipe 133. The heat absorption pipe 131 is disposed inside the heat absorption chamber 11. The heat release pipe 132 is attached to the outer wall of the heating chamber 12. The intermediate pipe 133 is connected to both the heat absorption pipe 131 and the heat release pipe 132.

[0033] In this embodiment, by setting the heat absorption pipe 131 inside the heat absorption chamber 11, the heat absorption pipe 131 can directly contact the high-temperature ceramic particles inside the heat absorption chamber 11. This allows the heat-conducting liquid inside the heat absorption pipe 131 to fully absorb the heat from the high-temperature ceramic particles. After absorbing heat and expanding, the liquid flows into the heat release pipe 132 along the middle pipe 133. The heat release pipe 132 is attached to the outer wall of the heating chamber 12 and will not affect the movement of the stirring mechanism 14 inside the heating chamber 12. This allows the stirring mechanism 14 to fully stir the material to be heated inside the heating chamber 12. The material to be heated can then fully exchange heat through the chamber wall of the heating chamber 12 and the heat release pipe 132 and be heated.

[0034] Specifically, in some embodiments, such as Figure 1 and Figure 2 As shown, the heat absorption chamber 11 contains a connected cylindrical body 111 and a tapered cylindrical body 112. The cylindrical body 111 is positioned above the tapered cylindrical body 112, and a first feed inlet is located at the top of the cylindrical body 111, which is configured to communicate with the outlet of the calcining kiln 2. A heat absorption pipe 131 is disposed inside the cylindrical body 111. The tapered cylindrical body 112 has a tapered structure from top to bottom, and a first discharge outlet communicating with a storage chamber is located at the bottom of the tapered cylindrical body 112.

[0035] In this embodiment, a cylindrical body 111 and a tapered body 112 are constructed inside the heat absorption chamber 11. The cylindrical body 111 is located at the top and is used to lay the heat absorption pipe 131 to ensure the contact area between the heat absorption pipe 131 and the high-temperature ceramic particles, so that the heat absorption pipe 131 and the high-temperature ceramic particles can fully absorb heat. At the same time, by setting the tapered body 112 at the bottom of the cylindrical body 111 and setting the first discharge port at the bottom of the tapered body 112 for discharging the high-temperature ceramic particles, the discharge speed of the high-temperature ceramic particles can be controlled to extend the residence time of the high-temperature ceramic particles in the cylindrical body 111, so that the high-temperature ceramic particles can be in contact with the heat absorption pipe 131 for a long time and fully exchange heat, which is beneficial to improving the utilization efficiency of the waste heat of the high-temperature ceramic particles.

[0036] Specifically, the tapered cylinder 112 can be a cone-shaped cavity with the tip pointing downwards.

[0037] Specifically, in some embodiments, such as Figure 1 and Figure 2 As shown, the heat absorption pipe 131 includes: multiple sets of first annular pipes 1311, multiple first connecting pipes 1312, and multiple second connecting pipes 1313. The multiple sets of first annular pipes 1311 are arranged at intervals along the axial direction of the cylindrical body 111, and each set of first annular pipes 1311 includes multiple concentrically arranged first annular pipes 1311. Adjacent concentrically arranged first annular pipes 1311 are connected to each other through at least one first connecting pipe 1312. Adjacent first annular pipes 1311 along the axial direction of the cylindrical body 111 are connected to each other through at least one second connecting pipe 1313.

[0038] In this embodiment, multiple sets of first annular tubes 1311 are arranged inside the cylindrical body 111. These sets of first annular tubes 1311 are spaced apart along the axial direction of the cylindrical body 111. Each set of first annular tubes 1311 includes multiple first annular tubes 1311 with different radii. These multiple first annular tubes 1311 with different radii are concentrically arranged, thereby enabling the multiple first annular tubes 1311 to be evenly distributed within the cylindrical body 111 along both the axial and radial directions. Simultaneously, adjacent first annular tubes 1311 are interconnected through a radially extending first connecting pipe 1312 or an axially extending second connecting pipe 1313, allowing the heat transfer fluid to flow freely between the individual first annular tubes 1311, thus ensuring sufficient contact and heat absorption with the high-temperature ceramic particles within the heat absorption chamber 11.

[0039] Optionally, such as Figure 1 and Figure 2As shown, adjacent first annular tubes 1311 along the radial direction of the cylindrical body 111 can be connected by multiple first connecting tubes 1312, and the multiple first connecting tubes 1312 are evenly arranged along the circumference of the cylindrical body 111; similarly, adjacent first annular tubes 1311 along the axial direction of the cylindrical body 111 are connected by multiple second connecting tubes 1313, and the multiple second connecting tubes 1313 are evenly arranged along the circumference of the cylindrical body 111.

[0040] Specifically, in some embodiments, such as Figure 1 and Figure 2 As shown, the heat dissipation pipeline 132 includes: a plurality of second annular pipes 1321 and a plurality of third connecting pipes 1322. The plurality of second annular pipes 1321 are sleeved on the outside of the heating chamber 12, and the plurality of second annular pipes 1321 are arranged at intervals along the height direction of the heating chamber 12. The plurality of third connecting pipes 1322 connect adjacent second annular pipes 1321 to each other through at least one third connecting pipe 1322.

[0041] In this embodiment, multiple second annular tubes 1321 are sleeved on the outside of the heating chamber 12. The multiple second annular tubes 1321 are arranged at intervals in the vertical direction, so that the multiple second annular tubes 1321 can be evenly distributed on the chamber wall of the heating chamber 12. At the same time, adjacent second annular tubes 1321 are interconnected through third connecting tubes 1322, so that the heat transfer fluid can flow freely between each second annular tube 1321, so that the heat transfer fluid can fully exchange heat with the chamber wall of the heating chamber 12, and fully heat the material in the heating chamber 12 through the chamber wall of the heating chamber 12.

[0042] Optionally, such as Figure 1 and Figure 2 As shown, adjacent second annular pipes 1321 can be connected by multiple third connecting pipes 1322, and the multiple third connecting pipes 1322 are evenly arranged along the circumference of the second annular pipes 1321.

[0043] In some embodiments, such as Figure 1 and Figure 2 As shown, the waste heat heating device 1 of the calcining kiln also includes a cover 15, on which a heating chamber 151 is formed. The cover 15 is provided with a second feed port and a second discharge port. The second feed port is connected to the outlet of the calcining kiln 2 to connect the outlet of the calcining kiln 2 and the heating chamber 151. The second discharge port is used to connect the heat absorption chamber 11 and the heating chamber 151. The heating chamber 12 is disposed inside the heating chamber 151.

[0044] In this embodiment, by providing a cover 15, the cover 15 can be installed at the outlet position of the calcining kiln 2 as a support structure for other components. The second feed port of the cover 15 is sleeved on the outside of the calcining kiln 2 and connected to the outlet of the calcining kiln 2, so that the calcined ceramsite in the calcining kiln 2 can be fed into the heating chamber 151 of the cover 15. The heating chamber 12 is also provided in the heating chamber 151, so that the high-temperature ceramsite in the heating chamber 151 can heat the heating chamber 12 (mainly through radiation heat exchange), and then enter the heat absorption chamber 11 and the heat transfer liquid in the heat absorption pipe 131 through the second discharge port for heat exchange. It can be understood that the cover 15 can also reduce the heat loss of the high-temperature ceramsite before entering the heat absorption chamber 11.

[0045] Optionally, in some embodiments, the housing 15 is also provided with an openable observation window for observing the situation inside the heating chamber 151.

[0046] Specifically, in some embodiments, such as Figure 1 and Figure 2 As shown, the heating chamber 151 includes a first cylindrical body 1511 and a second cylindrical body 1512 that are connected to each other. The first cylindrical body 1511 is located above the second cylindrical body 1512, and a second feed inlet is formed on the side wall of the first cylindrical body 1511. The heating chamber 12 is disposed in the first cylindrical body 1511. The second cylindrical body 1512 has a tapered structure from top to bottom, and a second discharge outlet is disposed at the bottom of the second cylindrical body 1512.

[0047] In this embodiment, the first cylindrical body 1511 of the heating chamber 151 is adapted to the shape of the heating chamber 12 and the outlet of the calcining kiln 2, so as to accommodate the heating chamber 12 and connect with the outlet of the calcining kiln 2. At the same time, by setting a second cylindrical body 1512 at the bottom of the first cylindrical body 1511 and setting a second discharge port for discharging high-temperature ceramsite at the bottom of the second cylindrical body 1512, the discharge speed of the high-temperature ceramsite can be controlled to extend the residence time of the high-temperature ceramsite in the heating chamber 151, so that the high-temperature ceramsite can fully exchange heat with the heating chamber 12 for a longer period of time, which is beneficial to improving the utilization efficiency of the waste heat of the high-temperature ceramsite.

[0048] In some embodiments, such as Figure 3 As shown, the waste heat heating device 1 of the calcining kiln further includes: a ceramsite cooling chamber 16, an air supply and heat exchange device 17, and a pretreatment device 18. The ceramsite cooling chamber 16 is connected to the heat absorption chamber 11 and is used to receive ceramsite from the heat absorption chamber 11. The air supply and heat exchange device 17 is connected to the ceramsite cooling chamber 16 and is used to supply air to the ceramsite cooling chamber 16. The pretreatment device 18 is connected to both the ceramsite cooling chamber 16 and the heating chamber 12. The pretreatment device 18 is used to receive hot air from the ceramsite cooling chamber 16 to dry and dehydrate the material to be heated, and then introduces the dried and dehydrated material into the heating chamber 12.

[0049] In this embodiment, the ceramsite cooling chamber 16 and the heat absorption chamber 11 are connected so that the ceramsite, after heat exchange with the heat conduction pipe 13 in the heat absorption chamber 11, is introduced into the ceramsite cooling chamber 16. The air supply and heat exchange device 12 supplies air to the ceramsite cooling chamber 16. The air flows into the ceramsite cooling chamber 16 and exchanges heat with the ceramsite inside, forming hot air at a certain temperature. The hot air can be introduced into the pretreatment device 18, which contains a certain amount of material to be heated, for drying and dehydration. The dried and dehydrated material is then introduced into the heating chamber 12 for subsequent heating. The drying and dehydration of the material before it is sent into the heating chamber 12 for calcination helps to improve the calcination quality and efficiency of materials such as phosphogypsum. Meanwhile, the interconnected ceramsite cooling chamber 16, air supply and heat exchange device 12, and pretreatment device 18 can further utilize the residual heat of the ceramsite after heat exchange in the heat absorption chamber 11 and heat conduction pipe 13 to preheat the material to be heated, which can further improve the thermal efficiency of the entire device.

[0050] In one specific embodiment, such as Figure 3 As shown, the pretreatment device 18 can be a rotary kiln. The inlet of the rotary kiln is used to introduce the material to be dried and dehydrated (such as phosphogypsum), and the outlet of the rotary kiln is connected to the heating chamber 12 so that the dried and dehydrated material can be introduced into the heating chamber 12. Exemplarily, the rotary kiln can be located above the heating chamber 12.

[0051] The ceramsite cooling chamber 16 is located below the heat absorption chamber 11. The top of the ceramsite cooling chamber 16 has an inlet and an outlet. The outlet is connected to the pretreatment device 18 to supply hot air into the pretreatment device 18. The inlet is connected to the heat absorption chamber 11 to receive ceramsite from the heat absorption chamber 11. The bottom of the ceramsite cooling chamber 16 has an outlet and an inlet. The outlet is used to discharge the cooled ceramsite, and the inlet is connected to the air supply and heat exchange device 12. For example, the air supply and heat exchange device 12 can be a blower and a duct. The blower supplies cold air to the ceramsite cooling chamber 16 through the duct. After heat exchange between the cold air and the ceramsite in the cooling chamber 16, the cold air absorbs the residual heat from the ceramsite, forming hot air at a certain temperature. The hot air rises and is introduced into the pretreatment device 18 through the outlet and the corresponding duct to dry and dehydrate the material in the pretreatment device 18.

[0052] Specifically, the ceramsite cooling chamber 16 may include multiple mutually separated chambers. The bottom of the heat absorption chamber 11 is provided with a feed pipe corresponding to each of the multiple chambers, and the air supply and heat exchange device 12 is connected to each chamber. Each feed pipe is equipped with a control valve, which can selectively open some control valves and close others under the control of an external control device. Specifically, when some control valves are open, the corresponding chamber can be used to receive and cool the ceramsite. After the amount of ceramsite in this chamber reaches a certain level, the control valve corresponding to this chamber is closed, and the receiving of ceramsite stops. The ceramsite in this chamber can continue to exchange heat until it reaches a predetermined temperature and is discharged through the outlet at the bottom of the chamber. At the same time, the control valve corresponding to another chamber is opened, so that the other chamber begins to receive and exchange ceramsite. By controlling the valves to open in turn, the ceramsite cooling chamber 16 can receive continuous discharge from the heat absorption chamber 11, and can also ensure that the ceramsite discharged into the ceramsite cooling chamber 16 can fully exchange heat, so as to make full use of the residual heat in the ceramsite.

[0053] Understandably, to achieve automated control of the above process, weight sensors and temperature sensors can be installed in each chamber, and control valves can also be installed at the discharge port at the bottom of the chamber. These weight sensors, temperature sensors, and control valves can be connected to external control equipment (such as a host computer). The host computer can control the opening and closing of the feed pipe and discharge port control valve of the corresponding chamber based on the detection data fed back by the weight sensors and temperature sensors in the chamber.

[0054] Specifically, in some embodiments, the heating chamber 12 is provided with a third inlet and a third outlet. The third inlet is used to communicate with the feeding hopper to receive the material fed into the feeding hopper, and the third outlet is used to communicate with the storage chamber to discharge the material into the storage chamber.

[0055] In this embodiment, by providing a third inlet and a third outlet on the heating chamber 12, which are connected to the feed head and the storage chamber respectively, continuous feeding and discharging of materials in the heating chamber 12 can be achieved through continuous external feeding.

[0056] Furthermore, valves can be installed in the third feed inlet and the third discharge outlet respectively to control the opening degree of the third feed inlet and the third discharge outlet, thereby controlling the feeding speed and discharging speed of the heating chamber 12, and thus controlling the amount of material heated in the heating chamber 12 and the heating time. It can be understood that by controlling the opening and closing of the third feed inlet and the third discharge outlet, the feeding mode of the calcining kiln waste heat heating device 1 can also be switched between continuous feeding and batch feeding.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A waste heat heating device for calcining kilns, characterized in that, include: A heat-absorbing chamber is configured to communicate with the outlet of a calcining kiln to receive ceramsite from the calcining kiln. A heating chamber, located above the heat-absorbing chamber, is used to hold the material to be heated; A heat-conducting pipe is disposed between the heat-absorbing chamber and the heating chamber. The heat-conducting pipe is used to contain the heat-conducting liquid and to absorb the heat from the heat-absorbing chamber to heat the heating chamber.

2. The waste heat heating device for calcining kilns according to claim 1, characterized in that, Also includes: A stirring mechanism is installed inside the heating chamber and is used to stir the materials inside the heating chamber.

3. The waste heat heating device for calcining kilns according to claim 2, characterized in that, The stirring mechanism includes: A driving component is disposed in the heating chamber; A rotating shaft is rotatably disposed within the heating chamber and is connected to the driving component for transmission. A stirring element is disposed on the rotating shaft; the driving element is used to drive the rotating shaft to rotate the stirring element and stir the material.

4. The waste heat heating device for calcining kilns according to claim 2, characterized in that, The heat-conducting pipeline includes: The heat absorption pipeline is installed inside the heat absorption chamber; The heat dissipation pipes are attached to the outer wall of the heating chamber; The intermediate pipeline is connected to both the heat absorption pipeline and the heat release pipeline.

5. The waste heat heating device for calcining kilns according to claim 4, characterized in that, The heat absorption chamber contains a connected cylindrical body and a tapering body. The cylindrical body is disposed above the tapered cylinder, and the top of the cylindrical body is provided with a first feed inlet, which is configured to communicate with the outlet of the calcining kiln; the heat absorption pipe is disposed inside the cylindrical body. The tapered cylinder is tapered from top to bottom, and the bottom of the tapered cylinder is provided with a first discharge port that communicates with the storage chamber.

6. The waste heat heating device for calcining kilns according to claim 5, characterized in that, The heat absorption pipeline includes: Multiple sets of first annular tubes are arranged at intervals along the axial direction of the cylindrical body, and each set of first annular tubes includes multiple concentrically arranged first annular tubes. Multiple first connecting pipes, and adjacent concentrically arranged first annular pipes are connected to each other through at least one first connecting pipe; Multiple second connecting pipes are connected to adjacent first annular pipes along the axial direction of the cylindrical body through at least one second connecting pipe.

7. The waste heat heating device for calcining kilns according to claim 4, characterized in that, The heat dissipation pipeline includes: Multiple second annular tubes are sleeved on the outside of the heating chamber, and the multiple second annular tubes are arranged at intervals along the height direction of the heating chamber; Multiple third connecting pipes are provided, and adjacent second annular pipes are connected to each other through at least one of the third connecting pipes.

8. The waste heat heating device for calcining kilns according to claim 1, characterized in that, Also includes: The cover has a heating chamber formed on it. The cover is provided with a second feed port and a second discharge port. The second feed port is connected to the outlet of the calcining kiln to connect the outlet of the calcining kiln and the heating chamber. The second discharge port is used to connect the heat absorption chamber and the heating chamber. The heating chamber is disposed inside the heating chamber.

9. The waste heat heating device for calcining kilns according to claim 8, characterized in that, The heating chamber includes a first cylinder and a second cylinder that are connected to each other; The first cylinder is located above the second cylinder, and the second feed inlet is formed on the side wall of the first cylinder; the heating chamber is disposed in the first cylinder; The second cylinder gradually narrows from top to bottom, and the second discharge port is located at the bottom of the second cylinder.

10. The waste heat heating device for calcining kilns according to claim 1, characterized in that, Also includes: Expanded clay cooling silo, air supply and heat exchange device and pretreatment device; The ceramsite cooling chamber and the heat absorption chamber are connected, and the ceramsite is used to receive ceramsite from the heat absorption chamber; The air supply and heat exchange device is connected to the ceramsite cooling chamber and is used to supply air to the ceramsite cooling chamber. The pretreatment device is connected to the ceramsite cooling chamber and the heating chamber respectively. The pretreatment device is used to receive hot air from the ceramsite cooling chamber to dry and dehydrate the material to be heated, and to pass the dried and dehydrated material into the heating chamber.

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