In-furnace crushing rotary kiln and using method thereof

Abstract

The invention relates to the technical field of rotary kiln equipment, in particular to an in-furnace crushing rotary kiln and a using method thereof. The in-furnace crushing rotary kiln comprises a rotary kiln body, one end of the rotary kiln body is connected with a feeding device, an air inlet device and a combustor, the feeding device, the air inlet device and the combustor are communicated with an inner cavity of the rotary kiln body, and a crushing mechanism is arranged in the inner cavity of the rotary kiln body. The crushing mechanism comprises a connecting shaft and a plurality of crushing parts, the connecting shaft is arranged in the axial direction of the rotary kiln body and penetrates through an inner cavity of the rotary kiln body, the crushing parts are arranged on the connecting shaft in a segmented mode in the axial direction of the connecting shaft, and the crushing mechanism is connected with a driving mechanism. And the driving mechanism is used for driving the connecting shaft to rotate and driving the crushing piece to rotate around the connecting shaft. According to the rotary kiln, materials flowing in the barrel can be fully crushed and ground, meanwhile, the contact condition of the materials and air is improved, and sufficient incineration of the materials is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of rotary kiln equipment, and in particular to an in-furnace crushing rotary kiln and a use method thereof. Background Art

[0002] As a type of solid waste incineration equipment, the rotary kiln incinerator is becoming more and more popular due to its many advantages such as simple structure, large material processing capacity, and strong fuel adaptability. At present, when the rotary kiln incinerates solid waste, the solid waste is poured into the interior of the cellar from the inlet, and then the cellar is driven to rotate by an external driving mechanism. While the cellar rotates, the solid waste is incinerated through its internal heating system, thereby achieving the purpose of solid waste treatment. However, the materials that need to be incinerated in the rotary kiln are relatively mixed, some of the materials have a large particle size, and are not well crushed before entering the furnace. In addition, the materials are easily accumulated in a fan shape in the cylinder, and the bottom materials are difficult to contact with the air, which is not conducive to the full combustion of the materials. Summary of the invention

[0003] The object of the present invention is to provide an in-furnace crushing rotary kiln to solve the problem of insufficient burning of materials in the rotary kiln in the prior art.

[0004] In order to solve the above problems, the present invention proposes an in-furnace crushing rotary kiln, and the technical solution adopted is: An in-furnace crushing rotary kiln comprises a rotary kiln body, one end of the rotary kiln body is connected to a feeding device, an air inlet device and a burner, the feeding device, the air inlet device and the burner are in communication with the inner cavity of the rotary kiln body, a crushing mechanism is arranged in the inner cavity of the rotary kiln body, the crushing mechanism comprises a connecting shaft which is arranged axially along the rotary kiln body and passes through the inner cavity of the rotary kiln body, and a plurality of crushing pieces are arranged on the connecting shaft, the crushing pieces are arranged in sections along the axial direction of the connecting shaft, the crushing mechanism is connected to a driving mechanism, the driving mechanism is used to drive the connecting shaft to rotate and drive the crushing pieces to rotate around the connecting shaft.

[0005] Furthermore, the crushing pieces are alternately arranged at intervals along the axial direction of the connecting shaft on the left and right sides of the connecting shaft.

[0006] Furthermore, along the material flow direction, the spacing between the crushing elements on the connecting shaft increases step by step along the axial direction of the connecting shaft.

[0007] Furthermore, a plurality of guide holes are evenly arranged on the crushing member.

[0008] Furthermore, the crushing element is a semicircular crushing disk, and the connecting shaft passes through the center position of the semicircular crushing disk so that the crushing disks are alternately arranged on the left and right sides of the connecting shaft at axial intervals along the connecting shaft, and the diameter of the semicircular crushing disk is adjustable; along the material flow direction, the diameter of the semicircular crushing disk on the connecting shaft increases step by step along the axial direction of the connecting shaft.

[0009] Furthermore, one end of the rotary kiln body connected to the feeding device, the air inlet device and the burner is respectively provided with a feeding device inlet, an air inlet and a burner inlet, and the feeding device inlet, the air inlet and the burner inlet are all arranged at a position deviating from the axial center of the rotary kiln body, so as to realize the communication between the feeding device, the air inlet device and the burner and the inner cavity of the rotary kiln body.

[0010] Furthermore, the feeding device comprises a silo and a feeder connected thereto, the feeder penetrates through an inlet of the feeding device and penetrates into the inner cavity of the rotary kiln body, and the outlet of the feeder is arranged away from the axial center position of the rotary kiln body.

[0011] Furthermore, the air inlet device includes a fan and an air inlet pipe connected thereto, the air inlet pipe is provided with a flow regulating valve, and the air inlet pipe is connected to an air inlet for delivering air into the inner cavity of the rotary kiln body.

[0012] Furthermore, the driving mechanism comprises a motor arranged outside the rotary kiln body, and the motor is connected to an end of the connecting shaft away from the feeding device.

[0013] Furthermore, a smoke outlet is arranged at one end of the rotary kiln body away from the feeding device, and the smoke outlet is arranged away from the axial center position of the rotary kiln body.

[0014] Beneficial effects: The present invention is an improved invention. The present invention is provided with a crushing mechanism in the inner cavity of the rotary kiln body. The crushing mechanism includes a connecting shaft that is arranged along the axial direction of the rotary kiln body and penetrates the inner cavity of the rotary kiln body, and a plurality of crushing parts arranged on the connecting shaft. The crushing parts are arranged in sections along the axial direction of the connecting shaft. The crushing mechanism is connected to a driving mechanism, and the driving mechanism is used to drive the connecting shaft to rotate and drive the crushing parts to rotate around the connecting shaft, so as to achieve good crushing and crushing of the material. The crushing mechanism in the in-furnace crushing rotary kiln of the present invention keeps rotating during the operation of the rotary kiln, wherein the crushing parts arranged in sections play a role in crushing and crushing the material flowing in the cylinder, so as to achieve uniform stirring of the material during the flow of the material in the cylinder, and some of the material is lifted up, which improves the contact between the material and the air, can fully mix the material and the air, and improves the flow field in the furnace, enhances the heat exchange and combustion process of the material, has great benefits for the combustion of the rotary kiln, and ensures the full combustion of the material.

[0015] The present invention also provides a method for using the in-furnace crushing rotary kiln, which is used for using the in-furnace crushing rotary kiln, and comprises the following steps: S1, start the air inlet device to input air into the inner cavity of the rotary kiln body; S2, starting the feeding device, the burner and the crushing mechanism, feeding the material into the inner cavity of the rotary kiln body and driving the crushing mechanism to rotate through the driving mechanism, and burning the material while the crushing mechanism crushes the material.

[0016] The crushing members are alternately arranged at intervals along the axial direction of the connecting shaft on the left and right sides of the connecting shaft, ensuring the adequacy of the crushing members when they rotate to perform crushing and rolling, thereby improving the crushing and rolling effects.

[0017] Along the material flow direction, the spacing between the crushing elements on the connecting shaft increases step by step along the axial direction of the connecting shaft, ensuring that the material is fully crushed and crushed step by step through the crushing elements when entering the inner cavity of the rotary kiln body, so that the material particle size is reduced, further improving the crushing and crushing effect.

[0018] A number of guide holes are evenly arranged on the crushing piece. When the air flows in the cylinder, it flows and turns between the left and right crushing pieces. Part of the gas passes through the guide holes on the crushing pieces. The flue gas can be fully mixed in the cylinder to ensure that the flow field in the entire cylinder is relatively uniform, so that the accumulation of gaseous pollutants does not occur, thereby improving the combustion effect.

[0019] The crushing element is a semicircular crushing disk, and the connecting shaft passes through the center position of the semicircular crushing disk so that the crushing disks are alternately arranged on the left and right sides of the connecting shaft along the axial direction of the connecting shaft, and the diameter of the semicircular crushing disk is adjustable; along the flow direction of the material, the diameter of the semicircular crushing disk on the connecting shaft increases step by step along the axial direction of the connecting shaft, and the material is fully crushed and crushed step by step through the crushing disk, and the material is lifted up by the side of the crushing disk, and the overall mixing uniformity of the material is enhanced; at the same time, the diameter of the crushing disk can be adjusted according to different materials and uses, so that the material can be crushed into a smaller particle size when flowing in the cylinder, and the edge corners of the semicircular crushing disk can crush the material during the rotation process.

[0020] The end of the rotary kiln body connected to the feeding device, the air inlet device and the burner is respectively provided with a feeding device inlet, an air inlet and a burner inlet. The feeding device inlet, the air inlet and the burner inlet are all arranged at a position deviating from the axial center of the rotary kiln body, so as to realize the connection between the feeding device, the air inlet device and the burner and the inner cavity of the rotary kiln body, so as to avoid the material entering the axial center of the rotary kiln body and being unable to be crushed and crushed, and at the same time avoid the uneven mixing of the entering air and the material, and also avoid the insufficient combustion of the material.

[0021] The feeding device includes a silo and a feeder connected thereto. The feeder penetrates through the inlet of the feeding device and penetrates into the inner cavity of the rotary kiln body. The outlet of the feeder is arranged away from the axial center position of the rotary kiln body. The structure is simple and the material is prevented from entering the axial center position of the rotary kiln body and being unable to be crushed and rolled.

[0022] The air inlet device includes a fan and an air inlet pipe connected thereto, the air inlet pipe is provided with a flow regulating valve, and the air inlet pipe is connected to an air inlet for sending air into the inner cavity of the rotary kiln body, so that the air can be applied according to the needs and fully realize the mixing and combustion of materials.

[0023] The driving mechanism comprises a motor arranged outside the rotary kiln body, and the motor is connected to an end of the connecting shaft away from the feeding device, and has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 1 is a schematic structural diagram of the in-furnace crushing rotary kiln in Embodiment 1 of the in-furnace crushing rotary kiln of the present invention; Figure 2 1 is a schematic structural diagram of a crushing mechanism in an in-furnace crushing rotary kiln in Embodiment 1 of the in-furnace crushing rotary kiln of the present invention; In the figure, 1, rotary kiln cylinder, 2, crushing mechanism, 21, connecting shaft, 22, left crushing disk, 23, right crushing disk, 24, guide hole, 3, silo, 4, feeder, 5, blower, 6, flow regulating valve, 7, burner, 8, motor, 9, flue gas outlet, 10, kiln head hood, 11, kiln tail hood, 12, connecting bearing, 13, supporting wheel. DETAILED DESCRIPTION

[0025] As cited in the background art, the incineration of materials in the rotary kiln in the prior art is insufficient. Therefore, the present invention provides an in-furnace crushing rotary kiln, including a rotary kiln body for burning materials, one end of the rotary kiln body is connected with a feeding device, an air intake device and a burner, the feeding device, the air intake device and the burner are connected with the inner cavity of the rotary kiln body, the feeding device is used to input materials into the inner cavity of the rotary kiln body, the air intake device is used to input air into the inner cavity of the rotary kiln body, and the burner is used to input a combustion source into the inner cavity of the rotary kiln body; a crushing mechanism is provided in the inner cavity of the rotary kiln body for crushing and grinding materials, the crushing mechanism includes a connecting shaft arranged along the axial direction of the rotary kiln body and penetrating the inner cavity of the rotary kiln body, and a connecting shaft arranged in the inner cavity of the rotary kiln body. There are multiple crushing parts on the connecting shaft, and the crushing parts are arranged in sections along the axial direction of the connecting shaft. The crushing mechanism is connected to a driving mechanism, which is used to drive the connecting shaft to rotate and drive the crushing parts to rotate around the connecting shaft. The crushing mechanism keeps rotating during the operation of the rotary kiln. The crushing parts arranged in sections have the effect of crushing and rolling the materials flowing in the cylinder, so that the materials are evenly stirred during the flow in the cylinder, and some materials are lifted up, which improves the contact between the materials and the air, can fully mix the materials and the air, and improve the flow field in the furnace, enhance the heat exchange and combustion process of the materials, which is of great benefit to the combustion of the rotary kiln.

[0026] Specific embodiment 1 of the in-furnace crushing rotary kiln of the present invention: In this embodiment, Figure 1 As shown, the furnace crushing rotary kiln comprises a rotary kiln body, one end of which is connected with a feeding device, an air inlet device and a burner 7, the feeding device, the air inlet device and the burner 7 are in communication with the inner cavity of the rotary kiln body, a crushing mechanism 2 is arranged in the inner cavity of the rotary kiln body, the crushing mechanism 2 comprises a connecting shaft 21 which is arranged along the axial direction of the rotary kiln body and penetrates the inner cavity of the rotary kiln body, and a plurality of crushing members arranged on the connecting shaft 21, the crushing members are arranged in sections along the axial direction of the connecting shaft 21, the crushing members are arranged alternately at intervals along the axial direction of the connecting shaft 21 on the left and right sides of the connecting shaft 21, and along the material flow direction, the spacing between the crushing members on the connecting shaft 21 increases step by step along the axial direction of the connecting shaft 21. The crushing mechanism 2 is connected with a driving mechanism, the driving mechanism is used to drive the connecting shaft 21 to rotate and drive the crushing members to rotate around the connecting shaft 21.

[0027] Specifically, the rotary kiln body includes a rotary kiln cylinder 1 and a kiln head cover 10 and a kiln tail cover 11 fixedly connected at both ends of the rotary kiln cylinder 1. A connecting bearing 12 is arranged at the center of the kiln head cover 10 and the kiln tail cover 11. The connecting bearing 12 is transmission-connected with a connecting shaft 21. The driving mechanism drives the connecting shaft 21 to rotate through the connecting bearing 12 and drives the crushing parts to rotate around the connecting shaft 21. The rotary kiln cylinder 1 is fixed by two supporting wheels 13, and a smoke outlet 9 is installed at the center of the kiln tail cover 11. During the operation of the rotary kiln, the driving mechanism drives the connecting bearing 12 to rotate, while the connecting bearing 12 drives the connecting shaft 21 to rotate and drives the crushing parts to rotate around the connecting shaft 21. Each crushing part crushes and crushes the material flowing in the cylinder, so that the material is evenly stirred during the flow in the cylinder, and some of the material is lifted up. As the air inlet device inputs air into the inner cavity of the rotary kiln body, the contact between the material and the air is improved, the material and the air can be fully mixed, and the flow field in the furnace is improved, thereby enhancing the heat exchange and combustion process of the material, which is of great benefit to the combustion of the rotary kiln.

[0028] In other embodiments, the crushing pieces may be arranged axially along the connecting shaft 21 at intervals on the left and right sides of the connecting shaft 21 , and the crushing pieces on the left and right sides may be symmetrically arranged.

[0029] In other embodiments, along the material flow direction, the spacing between the crushing elements on the connecting shaft 21 is set to be equal along the axial direction of the connecting shaft 21 .

[0030] Specific embodiment 2 of the in-furnace crushing rotary kiln of the present invention: Based on the above technical concept of the present invention, or based on the above specific embodiment of the present invention, another embodiment is provided below.

[0031] In this embodiment, Figure 1 and Figure 2 As shown, a number of guide holes 24 are evenly arranged on the crushing element. After the air enters the cylinder, it flows between the left and right crushing elements and turns during the flow process in the cylinder. Part of the air fills the entire rotary kiln cylinder 1 after being disturbed by the left and right crushing elements; part of the gas passes through the guide holes 24 on the crushing element to maintain the axial forward direction, stabilize the overall flow direction of the flue gas, and fully contact with the material to improve the combustion environment in the furnace. The flue gas can be fully mixed in the cylinder to ensure that the flow field in the entire cylinder is relatively uniform, so that the accumulation of gaseous pollutants does not occur, and the combustion effect is improved.

[0032] In this embodiment, the crushing element is a semicircular crushing disk, and the connecting shaft 21 passes through the center of the semicircular crushing disk so that the crushing disks are alternately arranged on the left and right sides of the connecting shaft 21 along the axial direction of the connecting shaft 21. The diameter of the semicircular crushing disk on the connecting shaft 21 can be fixed, but for different materials and uses, the size of the materials involved is also different. There may be a problem that the material is not completely crushed and crushed due to the semicircular crushing disk being too large or too small. Therefore, in this embodiment, preferably, as Figure 1 and Figure 2 As shown, the crushing element is a semicircular crushing disk, and the connecting shaft 21 passes through the center of the semicircular crushing disk so that the crushing disks are alternately arranged on the left and right sides of the connecting shaft 21 along the axial direction of the connecting shaft 21, wherein the semicircular crushing disk arranged on the left side of the connecting shaft 21 along the axial direction of the connecting shaft 21 is the left crushing disk 22, and the semicircular crushing disk arranged on the right side of the connecting shaft 21 along the axial direction of the connecting shaft 21 is the right crushing disk 23, and multiple guide holes 24 are evenly arranged on the left crushing disk 22 and the right crushing disk 23; the diameter of the left crushing disk 22 and the right crushing disk 23 is adjustable, and the material can be crushed into a smaller particle size when flowing in the cylinder according to different materials and uses. Along the flow direction of the material, the diameter of the semicircular crushing disk on the connecting shaft 21 increases step by step along the axial direction of the connecting shaft 21, and the material passes through the crushing disk step by step to be fully crushed and crushed, and at the same time, the material is lifted by the side of the crushing disk, and the overall mixing uniformity of the material is enhanced.

[0033] In other embodiments, along the material flow direction, the diameter of the semicircular crushing disk on the connecting shaft 21 remains unchanged along the axial direction of the connecting shaft 21 .

[0034] In other embodiments, the plurality of guide holes 24 on the left crushing disk 22 and the right crushing disk 23 may be arranged unevenly.

[0035] Specific embodiment 3 of the in-furnace crushing rotary kiln of the present invention: Based on the above technical concept of the present invention, or based on the above specific embodiment of the present invention, another embodiment is provided below.

[0036] In this embodiment, Figure 1 As shown, one end of the rotary kiln body connected to the feeding device, the air inlet device and the burner 7 is respectively provided with a feeding device inlet, an air inlet and a burner inlet, and the feeding device inlet, the air inlet and the burner inlet are all arranged at a position deviating from the axial center of the rotary kiln body, so as to realize the connection between the feeding device, the air inlet device and the burner 7 and the inner cavity of the rotary kiln body, so as to avoid the material entering the axial center of the rotary kiln body and being unable to be crushed and crushed, to avoid uneven mixing of the incoming air and the material, and to avoid insufficient combustion of the material.

[0037] Specifically, the feeding device includes a silo 3 and a feeder 4 connected thereto. The feeder 4 penetrates through the inlet of the feeding device and extends into the inner cavity of the rotary kiln body. The outlet of the feeder 4 is arranged away from the axial center position of the rotary kiln body, that is, the inlet of the feeding device passes through the kiln head cover 10 and is connected with the inner cavity of the rotary kiln cylinder 1. The feeder 4 penetrates through the kiln head cover 10 through the inlet of the feeding device and extends into the inner cavity of the rotary kiln cylinder 1. The outlet of the feeder 4 is arranged away from the axial center position of the rotary kiln cylinder 1, and the structure is simple.

[0038] The air inlet device includes a blower 5 and an air inlet pipe connected thereto. The air inlet penetrates the kiln head cover 10 and communicates with the inner cavity of the rotary kiln cylinder 1. A flow regulating valve 6 is arranged on the air inlet pipe. The air inlet pipe is connected to the air inlet for sending air into the inner cavity of the rotary kiln cylinder 1, so that the air can be applied and fully mixed and burned according to the needs. The burner inlet penetrates the kiln head cover 10 and communicates with the inner cavity of the rotary kiln cylinder 1. The burner 7 extends into the inner cavity of the rotary kiln cylinder 1 through the burner inlet through the kiln head cover 10 to realize the combustion of the material. The driving mechanism includes a motor 8 arranged outside the rotary kiln body. The motor 8 is connected to one end of the connecting shaft 21 away from the feeding device, that is, the motor 8 is connected to the connecting bearing 12 connected to the end of the connecting shaft 21 away from the feeding device. The motor 8 drives the connecting shaft 21 to rotate through the connecting bearing 12 and drives the crushing disk to rotate around the connecting shaft 21. The structure is simple and easy to operate.

[0039] Specific embodiment 1 of the method for using the in-furnace crushing rotary kiln of the present invention: In this embodiment, Figure 1 As shown, the method for using the above-mentioned in-furnace crushing rotary kiln includes the following steps: First, the air inlet device is started to input air into the inner cavity of the rotary kiln body; then, the feeding device, the burner 7 and the crushing mechanism 2 are started to input materials into the inner cavity of the rotary kiln body while the crushing mechanism 2 is driven to rotate through the driving mechanism, and the crushing mechanism 2 burns the materials while crushing the materials.

[0040] Specifically, first, when the rotary kiln is working, the blower 5 is started, and the flow regulating valve 6 on the blower 5 is opened, and the air after the flow regulating valve 6 adjusts the flow is input into the inner cavity of the rotary kiln cylinder 1; Next, the material in the silo 3 enters the inner cavity of the rotary kiln cylinder 1 through the feeder 4, the burner 7 is started, the motor 8 is started, the motor 8 drives the connecting bearing 12 to rotate and then drives the connecting shaft 21 to rotate, so that the left crushing disk 22 and the right crushing disk 23 rotate around the connecting shaft 21; Finally, after the material enters the inner cavity of the rotary kiln cylinder 1, it is crushed and crushed step by step by the crushing disks with gradually smaller gaps with the rotary kiln cylinder 1, and the particle size of the material is reduced. At the same time, it is lifted up by the sides of the left crushing disk 22 and the right crushing disk 23, and the position of the bottom layer material and the upper layer material are exchanged. The overall mixing uniformity of the material is enhanced, and the material is fully burned; finally, the smoke flows out from the smoke outlet 9 on the kiln tail cover 11.

[0041] Through the above description of the specific embodiments of the in-furnace crushing rotary kiln of the present invention, it can be seen that the in-furnace crushing rotary kiln of the present invention comprises a rotary kiln body for burning materials, one end of the rotary kiln body is connected with a feeding device, an air inlet device and a burner, the feeding device, the air inlet device and the burner are connected with the inner cavity of the rotary kiln body, the feeding device is used to input materials into the inner cavity of the rotary kiln body, the air inlet device is used to input air into the inner cavity of the rotary kiln body, and the burner is used to input a combustion source into the inner cavity of the rotary kiln body; a crushing mechanism is arranged in the inner cavity of the rotary kiln body for crushing and rolling materials, and the crushing mechanism comprises a rotary kiln body arranged along the axial direction of the rotary kiln body and penetrating through the rotary kiln body. The rotary kiln comprises a connecting shaft in the inner cavity of the rotary kiln body and a plurality of crushing parts arranged on the connecting shaft. The crushing parts are arranged in sections along the axial direction of the connecting shaft. The crushing mechanism is connected to a driving mechanism. The driving mechanism is used to drive the connecting shaft to rotate and drive the crushing parts to rotate around the connecting shaft. The crushing mechanism keeps rotating during the operation of the rotary kiln. The crushing parts arranged in sections crush and crush the materials flowing in the cylinder body, so that the materials are evenly stirred during the flow in the cylinder body, and some materials are lifted up, which improves the contact between the materials and the air, can fully mix the materials and the air, improves the flow field in the furnace, enhances the heat exchange and combustion process of the materials, and is of great benefit to the combustion of the rotary kiln.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. An in-furnace crushing rotary kiln, comprising a rotary kiln body, characterized in that: One end of the rotary kiln body is connected to a feeding device, an air inlet device and a burner (7); the feeding device, the air inlet device and the burner are in communication with the inner cavity of the rotary kiln body; a crushing mechanism (2) is arranged in the inner cavity of the rotary kiln body; the crushing mechanism (2) comprises a connecting shaft (21) arranged axially along the inner cavity of the rotary kiln body and penetrating the inner cavity of the rotary kiln body; and a plurality of crushing members arranged on the connecting shaft (21); the crushing members are arranged in sections along the axial direction of the connecting shaft (21); the crushing mechanism (2) is connected to a driving mechanism; the driving mechanism is used to drive the connecting shaft (21) to rotate and drive the crushing members to rotate around the connecting shaft (21).

2. The in-furnace crushing rotary kiln according to claim 1, characterized in that: The crushing pieces are arranged alternately and axially along the connecting shaft (21) at intervals on the left and right sides of the connecting shaft (21).

3. The in-furnace crushing rotary kiln according to claim 2, characterized in that: Along the material flow direction, the spacing between the crushing elements on the connecting shaft (21) increases step by step along the axial direction of the connecting shaft (21).

4. The in-furnace crushing rotary kiln according to claim 3, characterized in that: A plurality of guide holes (24) are evenly arranged on the crushing element.

5. The in-furnace crushing rotary kiln according to claim 4, characterized in that: The crushing element is a semicircular crushing disk, and the connecting shaft (21) passes through the center of the semicircular crushing disk so that the crushing disks are alternately arranged at intervals on the left and right sides of the connecting shaft (21) along the axial direction of the connecting shaft (21), and the diameter of the semicircular crushing disk is adjustable; along the material flow direction, the diameter of the semicircular crushing disk on the connecting shaft (21) increases step by step along the axial direction of the connecting shaft (21).

6. The in-furnace crushing rotary kiln according to any one of claims 1 to 5, characterized in that: An end of the rotary kiln body connected to the feeding device, the air inlet device and the burner (7) is respectively provided with a feeding device inlet, an air inlet and a burner inlet; the feeding device inlet, the air inlet and the burner inlet are all arranged at a position deviating from the axial center of the rotary kiln body, so as to realize communication between the feeding device, the air inlet device and the burner (7) and the inner cavity of the rotary kiln body.

7. The in-furnace crushing rotary kiln according to claim 6, characterized in that: The feeding device comprises a silo (3) and a feeder (4) connected thereto, wherein the feeder (4) penetrates through an inlet of the feeding device and penetrates into the inner cavity of the rotary kiln body, and an outlet of the feeder (4) is arranged offset from the axial center position of the rotary kiln body.

8. The in-furnace crushing rotary kiln according to claim 6, characterized in that: The air inlet device comprises an air blower (5) and an air inlet pipe connected thereto, the air inlet pipe is provided with a flow regulating valve, and the air inlet pipe is connected to an air inlet for sending air into the inner cavity of the rotary kiln body.

9. The in-furnace crushing rotary kiln according to any one of claims 1 to 5, characterized in that: The driving mechanism comprises a motor (8) arranged outside the rotary kiln body, and the motor (8) is connected to an end of the connecting shaft (21) away from the feeding device.

10. A method for using the in-furnace crushing rotary kiln according to any one of claims 1 to 9, characterized in that: The steps include: S1, start the air inlet device to input air into the inner cavity of the rotary kiln body; S2, starting the feeding device, the burner (7) and the crushing mechanism (2), feeding the material into the inner cavity of the rotary kiln body and driving the crushing mechanism (2) to rotate through the driving mechanism, and burning the material while the crushing mechanism (2) crushes the material.

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