A ceramic granule rotary kiln tail end waste heat recovery cooler

Abstract

The present disclosure belongs to the field of ceramsite production, and particularly relates to a ceramsite rotary kiln tail heat recovery cooler; comprising a feeding port, the feeding port is communicated with a discharge port of the rotary kiln, a flow guide plate is arranged directly below an outlet of the feeding port, a wind distribution plate is arranged directly below the flow guide plate; a wind distribution hole is formed in the wind distribution plate, high-pressure wind flows out upwardly from the wind distribution hole; the high-pressure wind flowing out upwardly from the wind distribution hole forms an air flow channel to drive the ceramsite to move together with the air flow until the ceramsite moves to a discharge hopper, and the ceramsite is in a suspended state in the air flow channel; the ceramsite can be suspended and cooled, and the cooling effect is relatively better than that of a drum type; meanwhile, the heat generated after the ceramsite is cooled can be selectively reused in the rotary kiln by inputting fresh wind, so that the problem of oxygen supply deficiency in the rotary kiln and the problem of chaotic and unclear kiln observation and kiln observation obstruction caused by directly inputting the cooled air into the rotary kiln again are solved.

Description

Technical Field

[0001] This disclosure pertains to the field of ceramsite production, specifically relating to a waste heat recovery cooler for the kiln tail of a rotary kiln for ceramsite production. Background Technology

[0002] Currently, the material cooling in rotary kilns for ceramsite mainly adopts a rotation method, which involves passing cold air into the drum-type cooling kiln. In this case, the drum-type can be understood as feeding ceramsite into the feed inlet, rotating the drum around its own axis, and the ceramsite sliding along the circumferential wall of the drum until it is removed from the discharge outlet. Alternatively, existing methods or stirring methods using agitator rollers can be used to achieve the cooling effect through material movement and material exchange with cold air. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this disclosure is to provide a waste heat recovery cooler for the tail of a rotary kiln for cooling the ceramsite produced by the rotary kiln.

[0004] The objective of this disclosure can be achieved through the following technical solutions: A waste heat recovery cooler for the tail of a rotary kiln for ceramsite includes a feed inlet connected to the discharge outlet of the rotary kiln. A guide plate is provided directly below the outlet of the feed inlet. The guide plate is inclined downwards, and the end of the guide plate that is inclined downwards is the end away from the pipe. Air inlet, located at the feed inlet; The air outlet is located near the discharge hopper; An air distribution plate is installed directly below the guide plate. One end of the air distribution plate near the guide plate is inclined downwards, and the air distribution plate extends to the discharge hopper. The air distribution plate has an array of air distribution holes, from which high-pressure air flows upward. High-pressure air flows upward from the air distribution hole, forming an airflow channel between the air inlet and the air outlet. The airflow channel causes the ceramsite that slides off the guide plate to move along with the airflow until it reaches the discharge hopper. The ceramsite is in a suspended state within the airflow channel.

[0005] Furthermore, it includes a cooling chamber, which is divided into an upper half and a lower half by a partition along the horizontal direction. The end of the cooling chamber near the feed inlet is covered by a kiln head hood, and the feed inlet is located inside the kiln head hood. The guide plate, air distribution plate, discharge hopper and dust outlet are all located in the lower half of the cooling chamber. The upper part of the cooling chamber away from the kiln head hood is open at one end, and this open end of the upper part of the cooling chamber forms an air inlet.

[0006] Furthermore, the upper part of the cooling chamber is provided with multiple partitions 2 that are connected to partition 1. The partitions 2 are arranged horizontally along the cooling chamber, and the multiple partitions 2 divide the upper part of the cooling chamber into multiple air intake chambers.

[0007] Furthermore, a first baffle plate is rotatably connected to one end of each of the two partition plates near the side walls of the cooling chamber, and the first baffle plate is located at one end of the partition plate near the outside.

[0008] Furthermore, each of the partitions on both sides of the same air intake chamber is provided with a second wind deflector that is rotatably connected. Between the opposing second wind deflectors in the same air intake chamber, there is a sliding chamber. Inside the sliding chamber, there are two opposing push rods. One end of each push rod is provided with a hinged slider, and the other end is provided with a threaded hole. A drive rod is threaded into the threaded hole. One end of each drive rod is provided with a first helical gear. Both first helical gears mesh with second helical gears. A drive shaft is provided on the second helical gear. One end of the drive shaft is provided with a first motor. The slider is slidably connected to the sliding grooves on the corresponding side walls of the partition.

[0009] Furthermore, two rollers are provided, both of which are completely wrapped with filter cloth. One roller is connected to a drive wheel, and the other roller is connected to a driven wheel. The drive wheel and the driven wheel are connected by a synchronous belt, and the drive wheel is connected to a second motor. A clamping plate is provided on the synchronous belt, and the clamping plate is connected to the filter cloth.

[0010] Furthermore, a dust discharge channel is provided on the cooling chamber located on the back side of the filter cloth.

[0011] The beneficial effects of this disclosure are: It can perform suspension cooling of ceramsite, and the cooling effect is better than that of drum cooling; at the same time, it reduces the breakage of ceramsite and improves the yield of ceramsite products. At the same time, the heat generated after the ceramsite is cooled can be selectively reused in the rotary kiln by introducing fresh air. This solves the problem of insufficient oxygen supply in the rotary kiln, as well as the problem of unclear kiln atmosphere and obstructed fire observation caused by directly introducing cooled air back into the rotary kiln. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this disclosure; Figure 2 This is a partial cross-sectional view in one embodiment of this disclosure; Figure 3 This is a partial cross-sectional view under another embodiment of this disclosure; Figure 4 The embodiments disclosed herein are related to Figure 3 Partial sectional views from different perspectives; Figure 5 This is a schematic diagram of the structure of an embodiment of the present disclosure, including a first wind deflector and a second wind deflector; Figure 6 This is a schematic diagram of a structure with a conduit according to an embodiment of the present disclosure; Figure 7 This is a partial top view of an embodiment of the present disclosure; Figure 8 This is an embodiment of the present disclosure. Figure 7 A magnified structural diagram at point A; Figure 9 This is a partial structural diagram of an embodiment of the present disclosure; Figure 10 This is a schematic diagram of a structure with filter cloth according to an embodiment of the present disclosure. Detailed Implementation

[0014] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0015] Example 1: like Figures 1 to 4 As shown, a waste heat recovery cooler for a rotary kiln tail of ceramsite includes a feed inlet 1, which is connected to the discharge outlet of the rotary kiln. In this application, the discharge outlet of the rotary kiln is connected to the feed inlet 1 via a pipe 10. Ceramsite processed by the rotary kiln flows out from the discharge outlet of the rotary kiln and falls into the pipe 10. In this application, the pipe 10 can be set relatively inclined downwards, and the ceramsite falling into the pipe 10 slides down until it falls from the pipe 10 into the feed inlet 1. A guide plate 11 is provided directly below the outlet of the feed inlet 1. The guide plate 11 is inclined downward. In this application, the end of the guide plate 11 that is inclined downward is the end close to the pipe 10. At this time, the ceramic particles falling from the pipe 10 into the feed inlet 1 fall onto the guide plate 11. Air inlet 100, air inlet 100 is located at feed inlet 1; Air outlet 101 is located near discharge hopper 12; A distribution plate 13 is provided directly below the guide plate 11. One end of the distribution plate 13 facing away from the guide plate 11 is inclined downward, and the distribution plate 13 extends to the discharge hopper 12. The air distribution plate 13 has an array of air distribution holes 130, from which high-pressure air flows upward.

[0016] In use, the entire hopper body of the pipe 10, the air distribution plate 13 and the inlet 1 is tilted towards the outlet hopper 12. With this setting, the ceramsite falling into the pipe 10 can slide down until it falls from the pipe 10 onto the guide plate 11. As shown in the figure of this application, it flows out from the side of the guide plate 11 near the pipe 10, flows down, and slides onto the air distribution plate 13. High-pressure air flows upward from the air distribution hole 130. Since one end of the air distribution plate 13 near the guide plate 11 is inclined downward, and the air outlet 101 is located near the discharge hopper 12, an airflow channel is formed between the air inlet 100 and the air outlet 101. The formed airflow channel drives the ceramsite that slides down the guide plate 11 to move with the airflow until it reaches the discharge hopper 12. In this application, since the air distribution plate 13 is provided directly below the airflow channel, the high-pressure air on the air distribution plate 13 provides upward support to the ceramsite in the airflow channel, so that the ceramsite is suspended in the airflow channel and flows from near the air inlet 100 to near the air outlet 101 with the airflow. In this application, the ceramsite is cooled by the airflow itself while suspended in the airflow channel. Since the ceramsite is in a suspended state, compared with the existing drum-type cooling method, which can be understood as feeding the ceramsite from the inlet 1, rotating the drum around its own axis, and the ceramsite sliding along the drum's circumference until it is removed from the outlet, and the existing method of stirring with a stirring roller, this application ensures that the ceramsite in a suspended state is in full contact with the airflow as it moves from the inlet 1 to the outlet hopper 12, and is in full contact with the flowing airflow throughout the cooling and discharge stage (in the airflow channel). The aforementioned two existing methods are indirect contact through the inner wall of the drum. Compared with the aforementioned two existing methods (which only rely on air as the refrigerant), this application improves the cooling effect. On the one hand, since the suspended ceramsite does not come into physical contact with the cylinder during the stage from the feed inlet 1 to the discharge hopper 12, the cracking of the ceramsite caused by collision with the cylinder wall during the cooling stage is reduced, thus improving the yield of ceramsite.

[0017] In this application, the ceramsite flows into the discharge hopper 12. Since the discharge hopper 12 itself lacks air distribution holes 130, it cannot provide high-pressure air. In this application, the ceramsite flows into the discharge hopper 12 and, due to the lack of support, falls from the airflow into the discharge hopper 12. The cooled ceramsite is then recovered using the discharge hopper 12.

[0018] In this application, the method for suspending ceramsite is to utilize an array of air distribution holes 130 on the air distribution plate 13, i.e., a dense array of air distribution holes 130. High-pressure air is passed through the air distribution holes 130 to support the ceramsite. Of course, the high-pressure air at this time also acts as cooling air, further cooling the ceramsite during the support stage. Theoretically, the denser the density of the air distribution holes, the better, so as to form a stable upward supporting force.

[0019] Regarding the movement of ceramsite, in this application, on the one hand, the ceramsite is moved by the airflow in the airflow channel, and on the other hand, the air distribution hole 130 can be deflected along the airflow direction. At this time, the air distribution hole 130 can push the ceramsite in the airflow direction; thereby realizing that the ceramsite moves along the airflow channel with the airflow.

[0020] In the illustrations of this application, the guide plate is configured such that the downward-sloping end of the guide plate 11 is closer to the pipe 10, rather than the downward-sloping end of the guide plate 11 being farther away from the pipe 10. If the downward-sloping end of the guide plate 11 is the end farther away from the pipe 10, when the ceramsite on the guide plate 11 falls downward, the air distribution plate blows upward, causing the upward-blowing part of the air distribution plate to blow upward from the position where the ceramsite falls on the guide plate 11, forming a backflow of ceramsite dust back to the pipe 10. At the same time, due to the backflow of dust, the entire feed inlet 1 chamber is filled with dust. If the chamber is provided with a window for observation, it cannot be observed due to the interference of dust. In this application, the end of the guide plate 11 that is inclined downwards is the end near the pipe 10. At this time, it is in a relatively closed state directly above the periphery of the air distribution plate. In this application, since the partition 21 and the guide plate 11 are in a relatively closed state directly above the periphery of the air distribution plate near the guide plate 11, the air distribution plate blows upwards. As a result, the air blown upwards by the air distribution plate cannot enter the chamber of the inlet 1 due to the constraint of the guide plate 11 and the partition 21. To be precise, the upper end of the chamber of the inlet 1; thus overcoming the disadvantage of reverse setting.

[0021] Regarding how high-pressure air is introduced through the air distribution hole 13, an air pipe connector 131 is provided on the side of the cooling chamber 2. The air pipe connector 131 is used to connect to an external air source. In the illustration of this application, there is a relatively sealed space between the lower end of the air distribution plate 13 and the bottom end of the cooling chamber 2. The air pipe connector 131 is provided in this space. Of course, a corresponding air source can also be connected to each air distribution hole 13 to realize the connection of the air distribution hole 13 to a high-pressure air source.

[0022] In this application, a dust outlet 14 is provided above the discharge hopper 12. The airflow from the airflow channel overflows from the dust outlet 14. Since the dust outlet 14 is located above the discharge hopper 12, the ceramsite flowing into the discharge hopper 12 lacks support and thus falls into the discharge hopper 12 from the airflow. The dust, being relatively light, flows out from the dust outlet 14 with the airflow. Based on the transfer of ceramsite by the airflow channel (from the inlet 1 to the discharge hopper 12), the airflow channel can also cool the ceramsite. At the same time, due to the weight difference between the ceramsite and the dust, the ceramsite and the dust can be separated well, further achieving dust separation. In this application, the dust outlet 14 can be equivalent to the air outlet 101.

[0023] Example 2: Based on Example 1, like Figure 5 and Figure 6 As shown, in some cases, a cooling chamber 2 is included, wherein the cooling chamber 2 is divided into an upper half and a lower half by a partition 21 along the horizontal direction. One end of the cooling chamber 2 near the feed inlet 1 is wrapped with a kiln head hood 3, the feed inlet 1 is located inside the kiln head hood 3, and the guide plate 11, the air distribution plate 13, the discharge hopper 12 and the dust outlet 14 are all located in the lower half of the cooling chamber 2. The upper half of the cooling chamber 2, which is away from the kiln head hood 3, is open at one end. At this time, the open end of the upper half of the cooling chamber 2 forms the air inlet 100. The upper part of the cooling chamber 2 near the kiln head hood 3 is closed at one end.

[0024] The upper half of the cooling chamber 2 of this application is provided with multiple partitions 22 connected to partition 1 21. The partitions 22 are arranged laterally along the cooling chamber 2, and the multiple partitions 22 divide the upper half of the cooling chamber 2 into multiple air intake chambers 200. Both partitions 22 and partition 1 21 are used for heat conduction. For example, both partitions 22 and partition 1 21 are made of thermally conductive materials, such as copper. With this design, the heat of the airflow channel in the lower half of the cooling chamber 2 is conducted through partitions 22 and partition 1 21, so that the heat of the airflow channel in the lower half of the cooling chamber 2 can be relatively discharged to the outside. At this time, the temperature of the airflow channel in the lower half of the cooling chamber 2 is relatively reduced, thereby improving the cooling effect of the ceramic particles in the airflow channel. When outside air enters through the air inlet 100, the second baffle 22 and the first baffle 21 heat the incoming air. At this time, a connecting duct 5 can be installed in the upper part of the cooling chamber 2. The duct 5 is preferably located close to the kiln head hood 3. The incoming air is heated by the second baffle 22 and the first baffle 21 and flows out through the duct. The duct can be connected to the inside of the rotary kiln to supply oxygen to the rotary kiln, so as to avoid insufficient oxygen supply in the rotary kiln and cause the kiln to be cloudy and unclear, which would hinder the observation of the fire inside the kiln.

[0025] Currently, the material cooling in rotary kilns for ceramsite mainly employs a rotation method, introducing cold air into the kiln. Cooling is achieved through material movement and exchange between the material and the cold air. However, the hot air generated after cooling is reintroduced into the kiln. Because the kiln itself consumed oxygen and produced carbon dioxide during calcination, the oxygen content of the cooled air is low. Furthermore, dust is also present in the air, making it difficult to directly utilize this air in the kiln later, leading to insufficient oxygen supply and creating a cloudy environment that hinders observation of the firing process.

[0026] This application, based on the utilization of thermal energy, directly utilizes fresh air, avoiding the problems of low oxygen content and dust in the air.

[0027] Example 3: Based on Example 1, like Figure 5 , Figures 7-9 As shown, in some cases, a cooling chamber 2 is included, wherein the cooling chamber 2 is divided into an upper half and a lower half by a partition 21 along the horizontal direction. One end of the cooling chamber 2 near the feed inlet 1 is wrapped with a kiln head hood 3, the feed inlet 1 is located inside the kiln head hood 3, and the guide plate 11, the air distribution plate 13, the discharge hopper 12 and the dust outlet 14 are all located in the lower half of the cooling chamber 2. Both ends of the upper half of the cooling chamber 2 are open. At this time, the upper half of the cooling chamber 2, which is away from the kiln head hood 3, forms an air inlet 100. During use, outside air enters from the upper part of the cooling chamber 2 into the feed inlet 1, flows along the airflow channel, and flows out from the dust outlet 14; during this period, outside air is introduced into the feed inlet 1 and flows along the airflow channel to cool the ceramsite. In this application, due to the presence of airflow channels, the cooling chamber 2 has a relatively large lateral length. The upper half of the cooling chamber 2 is equipped with multiple partitions 22 connected to partition 1 21. These partitions 22 are arranged laterally along the cooling chamber 2, dividing the upper half of the cooling chamber 2 into multiple air inlets 200. Both partitions 22 and partition 1 21 are used for heat conduction. For example, both partitions 22 and partition 1 21 are made of thermally conductive materials, such as copper. This design allows the heat from the airflow channels in the lower half of the cooling chamber 2 to be conducted through partitions 22 and partition 1 21, enabling the heat from the airflow channels in the lower half of the cooling chamber 2 to be relatively dissipated. This results in a relatively lower temperature in the airflow channels in the lower half of the cooling chamber 2, improving the cooling effect of the ceramic particles within the airflow channels. When outside air enters the feed inlet 1 from the upper part of the cooling chamber 2, the outside air also carries the heat from the partition 22 and partition 21 into the feed inlet 1. At this time, the outside air cools the partition 22 and partition 21, and the partition 22 and partition 21 are used for continuous heat conduction. At this time, the outside air at the feed inlet 1 has residual heat. The outside air blows the ceramsite on the guide plate 11 to the top of the air distribution plate 13 and flows into the airflow channel. In other words, during the initial stage of the ceramsite entering the airflow channel, the air blown onto the ceramsite has residual heat, which avoids the initial temperature difference between the outside air and the ceramsite falling onto the guide plate 11 being too large, which could cause cracks on the surface of the ceramsite. At the same time, this setting also makes full use of the heat dissipated by the cooling of the ceramsite for preheating.

[0028] Of course, at this time, the discharge hopper 12 can be understood as a relatively closed space to prevent outside air from flowing directly from the discharge hopper 12 to the air outlet 101 and out, thus preventing air from entering from the air inlet 100; In this application, a first baffle plate 23 is rotatably connected to one end of each of the partition plates 22 near the two side walls of the cooling chamber 2. The first baffle plate 23 is located at one end of the partition plate 22 near the outside. In actual use, the first baffle plate 23 can be moved to both sides, so that the air inlet chambers 200 on both sides are in a relatively closed state. At this time, when the exhaust flow rate of the entire dust outlet 14 remains relatively unchanged, the speed of the outside air entering the feed inlet 1 from the remaining air inlet chamber 200 is relatively increased. If this principle is used, the falling speed of the ceramsite in the guide plate 11 can be accelerated, especially when the amount of ceramsite entering the feed inlet 1 from the pipe 10 increases. Regarding how to drive the first baffle plate 23 to rotate to both sides, this can be solved using existing technology. For example, in this application, the cylinder 231 is hinged to the side wall of the cooling chamber 2, and the retraction rod of the cylinder 231 is hinged to the first baffle plate 23. In use, the retraction rod of the cylinder 231 retracts to drive the first baffle plate 23 to move, thereby realizing the movement of the first baffle plate 23, such as moving to both sides or returning to the initial position as needed.

[0029] Of course, in some cases, the sides of the partitions 22 on both sides of the same air intake 200 are provided with rotatably connected second baffles. Between the opposing second baffles in the same air intake 200, there is a sliding chamber 241. There are two opposing push rods 242 in the sliding chamber 241. One end of the push rod 242 is provided with a hinged slider 243, and the other side is provided with a threaded hole. A drive rod 244 is threadedly connected in the threaded hole. One end of the drive rod 244 is provided with a first helical gear 245. Both first helical gears 245 mesh with second helical gears 246. A drive shaft 247 is provided on the second helical gear 246. One end of the drive shaft 247 is provided with a first motor 248. The slider 243 is slidably connected to the sliding groove on the side wall of the corresponding partition 22. In use, the first motor 248 drives the second helical gear 246 to rotate. The rotating second helical gear 246 drives the first helical gear 245 to rotate, which in turn drives the drive rod 244 to rotate. The drive rod 244 drives the push rod 242 to move along the sliding chamber 241. The push rod 242 drives the second baffle to rotate (the second baffle rotates around the rotating connection between it and the partition 22). If the second baffle is rotated to fit against the partition 22 as needed, the second baffle will not change the airflow path of the incoming air. If the second baffle is rotated to the state shown in the figure as needed, an air flow channel is formed between the second baffles. Through the overall bent air flow channel, the time for air to pass through the air inlet chamber is increased. At this time, the air flowing out of the air inlet chamber 200 to the feed inlet 1 can meet the temperature in the original state (without the second baffle; or the second baffle and the partition 22 are in a close fit), which increases the initial temperature difference between the outside air and the ceramic particles falling onto the guide plate 11. During this period, the first baffle 23 moves to both sides, so that the air inlets 200 on both sides are in a relatively closed state.

[0030] In this application, the second baffle plate near the feed inlet 1, in the illustrated state, forms a constraint with the opposing second baffle plates, that is, the opposing second baffle plates relatively gather the air flowing out of the air inlet chamber 200, and the speed of the outside air entering the feed inlet 1 from the air inlet chamber 200 is relatively increased. Of course, in some cases, the first baffle plate 23 and the second baffle plate can also be made of thermally conductive materials, such as copper. With this design, the heat of the airflow channel in the lower half of the cooling chamber 2 is conducted through the first baffle plate 23 and the second baffle plate, so that the heat of the airflow channel in the lower half of the cooling chamber 2 can be relatively discharged to the outside. At this time, the temperature of the airflow channel in the lower half of the cooling chamber 2 is relatively reduced, thereby improving the cooling effect of the ceramic particles in the airflow channel.

[0031] Regarding the fixing of the sliding chamber 241, in this application, it can be fixed to the top surface of the cooling chamber 2. The drive shaft 247 passes through the top surface of the cooling chamber 2 and is coaxially connected to the first motor 248. The first motor 248 can be fixed on the top of the cooling chamber 2, thereby fixing the relative position of the sliding chamber 241 and the first motor 248.

[0032] Example 4: Based on Example 1, Example 2, or Example 3 like Figure 10 As shown, in some cases, due to the use of ceramsite suspension for cooling and feeding in this application, when the ceramsite is suspended and pushed to the discharge hopper 12, although the discharge hopper 12 is not equipped with air distribution holes 130, the ceramsite still has inertia when overflowing from the airflow channel. If the inertia is too large, the ceramsite may collide with the side wall of the opposite cooling chamber 2, which may cause damage to the ceramsite due to the collision. In this application, two rollers 4 are also provided, and the two rollers 4 are completely wrapped with filter cloth 41. One roller 4 is connected to a drive wheel, and the other roller 4 is connected to a driven wheel. The drive wheel and the driven wheel are connected by a synchronous belt 43. The drive wheel is connected to a second synchronous belt 44. The motor 42 and the synchronous belt 43 are equipped with clamping plates 44, which are connected to the filter cloth 41. In use, the second motor 42 drives the drive wheel to rotate, which in turn drives the synchronous belt 43 to rotate. The rotating synchronous belt 43, through the clamping plates 44, drives the filter cloth 41 to move synchronously. With this arrangement, the filter cloth 41 is placed on the side of the feed hopper facing away from the airflow channel. When the inertia of the ceramsite is large, the ceramsite falls onto the filter cloth 41, where it is cushioned. The ceramsite then slides off the filter cloth 41 into the discharge hopper 12, preventing damage to the ceramsite from colliding with the opposite side wall of the cooling chamber 2 if the inertia is too great. The filter cloth 41 in this application can be made of non-woven fabric.

[0033] Of course, since the filter cloth 41 has a relative adhesion to dust, the dust adhering to the ceramic particles that fall onto the filter cloth 41 is also adhering to the filter cloth 41, which further improves the cleanliness of the ceramic particles themselves.

[0034] Based on the above, a dust discharge channel 45 is provided on the cooling chamber 2 on the back side of the filter cloth 41. In use, the dust discharge channel 45 draws air to adsorb and remove the dust on the filter cloth 41 on the side of the dust discharge channel 45. During the process of the dust discharge channel 45 drawing air, the ceramsite in the cooling chamber 2 is not being cooled. During this period, the second motor 42 can be driven as needed to replace the filter cloth 41 near the dust discharge channel 45, thereby indirectly removing dust from the entire filter cloth 41.

[0035] How to perform air intake in dust exhaust channel 45? A negative pressure pump can be connected to dust exhaust channel 45 to perform air intake by using the negative pressure pump.

[0036] In the diagram, the dust exhaust channel 45 and the dust outlet 14 are connected. At this time, the dust exhaust channel 45 can be drawn in by the negative pressure of the dust outlet 14. This can be understood as the cooling chamber 2 not being cooled by the ceramsite, and the dust outlet 14 being closed.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this disclosure. Those skilled in the art should understand that this disclosure is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this disclosure. Various changes and modifications can be made to this disclosure without departing from its spirit and scope, and all such changes and modifications fall within the scope of this disclosure as claimed.

Claims

1. A waste heat recovery cooler for a rotary kiln tail of ceramsite, comprising a feed inlet (1) connected to the discharge outlet of the rotary kiln, characterized in that, A guide plate (11) is provided directly below the outlet of the feed inlet (1). The guide plate (11) is inclined downwards, and the end of the guide plate (11) that is inclined downwards is the end close to the pipe (10). Air inlet (100), the air inlet (100) is located at the feed inlet (1); The air outlet (101) is located near the discharge hopper (12); A distribution plate (13) is provided directly below the guide plate (11). One end of the distribution plate (13) near the guide plate (11) is inclined downwards, and the distribution plate (13) extends to the discharge hopper (12). The air distribution plate (13) has an array of air distribution holes (130). High-pressure air flows upward through the air distribution hole (130), forming an airflow channel between the air inlet (100) and the air outlet (101). The airflow channel causes the ceramsite that slides down on the guide plate (11) to move together with the airflow until it reaches the discharge hopper (12). The ceramsite is in a suspended state in the airflow channel. It includes a cooling chamber (2), which is divided into an upper half and a lower half by a partition (21) along the horizontal direction. The cooling chamber (2) near the feed inlet (1) is wrapped with a kiln head cover (3). The feed inlet (1) is located inside the kiln head cover (3). The guide plate (11), the air distribution plate (13), the discharge hopper (12) and the dust outlet (14) are all located in the lower half of the cooling chamber (2). The upper half of the cooling chamber (2) facing away from the kiln head cover (3) is open at one end, and the open end of the upper half of the cooling chamber (2) forms an air inlet (100). The upper part of the cooling chamber (2) near the kiln head cover (3) is closed at one end.

2. The waste heat recovery cooler for the kiln tail of a rotary kiln for ceramsite as described in claim 1, characterized in that, The upper half of the cooling chamber (2) is provided with multiple partitions (22) that are connected to partition one (21). The partitions (22) are arranged horizontally along the cooling chamber (2). The multiple partitions (22) divide the upper half of the cooling chamber (2) into multiple air intake chambers (200).

3. The waste heat recovery cooler for the kiln tail of a rotary kiln for ceramsite as described in claim 2, characterized in that, Both partition 2 (22) and partition 1 (21) are made of copper.

4. The waste heat recovery cooler for the kiln tail of a rotary kiln for ceramsite as described in claim 2, characterized in that, Each of the two partitions (22) near the cooling chamber (2) has a first wind deflector (23) rotatably connected to one end. The first wind deflector (23) is located at one end of the partition (22) near the outside.

5. A waste heat recovery cooler for the tail of a rotary kiln for ceramsite as described in claim 4, characterized in that, The sides of the partitions (22) on both sides of the same air intake chamber (200) are provided with second baffles that are rotatably connected. A sliding chamber (241) is provided between the opposing second baffles in the same air intake chamber (200). Two opposing push rods (242) are provided in the sliding chamber (241). One end of the push rod (242) is provided with a hinged slider (243), and the other side is provided with a threaded hole. A drive rod (244) is threadedly connected in the threaded hole. One end of the drive rod (244) is provided with a first helical gear (245). Both first helical gears (245) mesh with second helical gears (246). A drive shaft (247) is provided on the second helical gear (246). A first motor (248) is provided at one end of the drive shaft (247). The slider (243) is slidably connected to the groove on the side wall of the corresponding partition (22).

6. The waste heat recovery cooler for the tail of a rotary kiln for ceramsite as described in claim 5, characterized in that, The first wind deflector (23) and the second wind deflector are made of copper.

7. The waste heat recovery cooler for the kiln tail of a rotary kiln for ceramsite as described in claim 1, characterized in that, Two rollers (4) are provided, and the filter cloth (41) is completely wrapped around the two rollers (4). One roller (4) is connected to a drive wheel, and the other roller (4) is connected to a driven wheel. The drive wheel and the driven wheel are connected by a synchronous belt (43). The drive wheel is connected to a second motor (42). A clamping plate (44) is provided on the synchronous belt (43), and the clamping plate (44) is connected to the filter cloth (41).

8. A waste heat recovery cooler for the tail of a rotary kiln for ceramsite as described in claim 7, characterized in that, A dust discharge channel (45) is provided on the cooling chamber (2) located on the back side of the filter cloth (41).

Images