Coal gangue incineration device, system and method

Abstract

The invention relates to a coal gangue incineration device, system and method. The coal gangue incineration device comprises an outer cylinder, an inner cylinder and a supporting beam, a slag discharging opening and a smoke discharging opening are formed in the outer cylinder, the inner cylinder is arranged in the outer cylinder and rotationally connected with the outer cylinder, a flowing cavity is formed between the inner cylinder and the outer cylinder, the inner cylinder is provided with a combustion chamber, a feeding opening and a discharging opening, the combustion chamber communicates with the flowing cavity through the discharging opening, and the discharging opening is far away from the smoke discharging opening in the preset direction. The discharging port is adjacent to the slag discharging port in the preset direction, the supporting beam penetrates through the outer barrel and the inner barrel, a ventilation channel is formed in the supporting beam, and the ventilation channel communicates with the combustion chamber so that air can be led into the combustion chamber. According to the coal gangue incineration device, the coal gangue particles and the combustion chamber are preheated through high-temperature flue gas generated by combustion of the coal gangue particles, so that the combustion chamber is kept at a high temperature, stable combustion of the coal gangue particles is guaranteed, blending combustion of other fuels is not needed, meanwhile, the lower limit of the calorific value of the coal gangue capable of being incinerated and utilized is reduced to 600 kcal / kg, and the combustion efficiency is improved. And the resource utilization amount of the coal gangue is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of solid waste incineration, and in particular to a coal gangue incineration device, system and method. Background Art

[0002] Gangue is a large amount of solid waste generated during the coal mining process. Currently, the amount of low- and medium-calorific value gangue has reached tens of billions of tons, primarily in stockpiles. This not only occupies significant land resources and pollutes the environment, but also poses safety risks due to spontaneous combustion. Gangue has a wide range of calorific values ​​and contains very little volatile matter, making it difficult to ignite and burn. The calorific value of gangue for direct incineration in a circulating fluidized bed (CFB) requires it to be greater than 1500 kcal / kg. Furthermore, CFB boilers that burn 100% gangue suffer from wear and unstable combustion in practice, necessitating the blending of higher-calorific value coal. Large quantities of gangue with a calorific value between 600 and 1500 kcal / kg are produced annually. To achieve the goal of a waste-free city, new combustion technologies and solutions are urgently needed to recycle this low-calorific value gangue. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes a coal gangue incineration device, which uses the high-temperature flue gas generated by the combustion of coal gangue particles to preheat the coal gangue particles and the combustion chamber, so that the combustion chamber is maintained at a relatively high temperature, ensuring the stable combustion of the coal gangue particles without the need to mix other fuels. At the same time, the lower limit of the calorific value of the coal gangue that can be burned is reduced, so that coal gangue with a calorific value higher than 600kcal / kg can be directly burned and its residual heat can be subsequently recovered and utilized.

[0005] An embodiment of the present invention provides a coal gangue incineration system.

[0006] An embodiment of the present invention provides a method for burning coal gangue.

[0007] According to an embodiment of the present invention, a coal gangue incineration device includes an outer cylinder, an inner cylinder and a support beam, the outer cylinder is provided with a slag discharge port and a smoke discharge port, the inner cylinder is arranged in the outer cylinder and is rotatably connected to the outer cylinder, a flow cavity is formed between the inner cylinder and the outer cylinder, the inner cylinder has a combustion chamber, the inner cylinder is respectively provided with a feed port and a discharge port at both ends in a preset direction, the combustion chamber is connected with the flow cavity through the discharge port, the discharge port is away from the smoke discharge port in the preset direction, and the discharge port is adjacent to the slag discharge port in the preset direction, the support beam is passed through the outer cylinder and the inner cylinder, a ventilation channel is provided inside the support beam, and the ventilation channel is connected with the combustion chamber to allow air to enter the combustion chamber.

[0008] The gangue incineration device of the embodiment of the present invention uses the high-temperature flue gas generated by the combustion of gangue particles to preheat the gangue particles and the combustion chamber, so that the combustion chamber is maintained at a relatively high temperature, ensuring the stable combustion of the gangue particles without the need to mix other fuels. At the same time, the lower limit of the calorific value of the gangue that can be burned is reduced, so that gangue with a calorific value higher than 600kcal / kg can be directly burned and its residual heat can be subsequently recovered and utilized.

[0009] In some embodiments, the inner cylinder includes a cylinder body and a feed pipe, the cylinder body defines the combustion chamber, one end of the feed pipe forms the feed port, the other end of the feed pipe is connected to the cylinder body, the feed pipe is rotatably provided on the outer cylinder, and a portion of the feed pipe is located inside the outer cylinder.

[0010] In some embodiments, the support beam is fixedly connected to the cylinder, one end of the support beam is passed through the feed pipe, and a feed spiral section is provided on the support beam, and the feed spiral section is opposite to the feed port.

[0011] In some embodiments, the other end of the support beam is located outside the outer tube and is used to connect to the air source. The other end of the support beam is located on a side of the outer tube away from the smoke exhaust port in the preset direction.

[0012] In some embodiments, the support beam passes through the discharge port, the support beam is fixedly connected to the inner tube, and a discharge spiral section is provided on the support beam, and the discharge spiral section is opposite to the discharge port.

[0013] In some embodiments, a plurality of air outlets are provided on the support beam, and the air outlets are connected to the ventilation channel.

[0014] In some embodiments, in the preset direction, the plurality of air outlets are located in the middle of the combustion chamber and on one side adjacent to the discharge port;

[0015] And / or, the gangue incineration device further includes an air duct, which is arranged on the support beam and communicated with the air outlet.

[0016] In some embodiments, the gangue incineration device further comprises a support rod, wherein the support rod connects the support beam and the inner cylinder;

[0017] And / or, the gangue incineration device further comprises a plurality of collision balls, wherein the collision balls are located in the combustion chamber;

[0018] And / or, there is an angle between the preset direction and the horizontal direction, the discharge port is located at the lower end of the inner cylinder, and the slag discharge port is located at the lower end of the outer cylinder.

[0019] And / or, it further includes a material guiding structure, which is arranged on the inner wall surface of the inner cylinder.

[0020] The gangue incineration system of the embodiment of the present invention includes a crushing device and a gangue incineration device, and the feed port is connected to the discharge port of the crushing device.

[0021] The gangue incineration system of the embodiment of the present invention can incinerate gangue with a calorific value of more than 600 kcal / kg, ensuring stable combustion of the gangue without mixing with other fuels.

[0022] The gangue incineration method of the embodiment of the present invention crushes gangue with a calorific value of more than 600 kcal / kg to a particle size of less than or equal to 10 mm, and then feeds the crushed gangue into a gangue incineration device for incineration.

[0023] The gangue incineration method of the embodiment of the present invention can incinerate gangue with a calorific value of more than 600 kcal / kg, ensuring stable combustion of the gangue without mixing with other fuels. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of a gangue incineration device according to an embodiment of the present invention;

[0025] Figure 2 It is a schematic structural diagram of the inner tube, support beams and support rods according to an embodiment of the present invention.

[0026] Reference numerals:

[0027] 100. Coal gangue incineration equipment;

[0028] 10. Flow chamber, 20. Combustion chamber;

[0029] 1. Outer cylinder, 11. Slag discharge port, 12. Smoke discharge port;

[0030] 2. Inner cylinder, 21. Feed port, 22. Discharge port, 23. Cylinder body, 24. Feed pipe;

[0031] 3. Support beam, 31. Feed spiral section, 32. Discharge spiral section, 33. Air outlet;

[0032] 4. Support rod. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0034] Please refer to the attached Figures 1-2, the gangue incineration device 100, system and method of the embodiment of the present invention are described in detail.

[0035] The gangue incineration system according to the embodiment of the present invention includes a crushing device and a gangue incineration device 100 .

[0036] The gangue incineration device 100 of the embodiment of the present invention includes an outer tube 1, an inner tube 2, and a support beam 3. The outer tube 1 is provided with a slag discharge port 11 and a smoke discharge port 12. The inner tube 2 is arranged inside the outer tube 1 and is rotatably connected to the outer tube 1. A flow cavity 10 is formed between the inner tube 2 and the outer tube 1. The inner tube 2 has a combustion chamber 20. The inner tube 2 is provided with a feed port 21 and a discharge port 22 at both ends in a preset direction. The combustion chamber 20 is connected to the flow cavity 10 through the discharge port 22. The discharge port 22 is away from the smoke discharge port 12 in the preset direction, and the discharge port 22 is adjacent to the slag discharge port 11 in the preset direction. The support beam 3 is provided through the outer tube 1 and the inner tube 2. A ventilation channel is provided inside the support beam 3. The ventilation channel is connected to the combustion chamber 20 to allow air to enter the combustion chamber 20.

[0037] The discharge port of the crushing device is communicated with the feed port 21 .

[0038] The gangue incineration method of an embodiment of the present invention crushes gangue with a calorific value of 600 kcal / kg or more to a particle size of 10 mm or less, and then feeds the crushed gangue into a gangue incineration device 100 for incineration. Crushing the gangue to a particle size of less than 10 mm increases the specific surface area of ​​the gangue and improves its combustion performance index.

[0039] The crushed gangue particles enter the combustion chamber 20 of the gangue incineration device 100 of the embodiment of the present invention through the feed port 21. Air enters the combustion chamber 20 through the ventilation channel of the support beam 3. At the same time, the inner tube 2 rotates, thereby driving the gangue particles to continuously flip and roll. On the one hand, it drives the gangue particles to move toward the discharge port 22, and on the other hand, it increases the contact area between the gangue particles and the inner tube 2. The gangue particles burn in the combustion chamber 20, and the high-temperature flue gas generated by the combustion enters the flow cavity 10 through the discharge port 22 and is then discharged from the exhaust port 12. During the process of the high-temperature flue gas flowing from the discharge port 22 to the exhaust port 12, the high-temperature flue gas flows through the outer wall of the inner tube 2. Due to the heat conduction of the inner tube 2, the high-temperature flue gas exchanges heat with the inner tube 2, heating the inner tube 2 and the combustion chamber 20, thereby causing the heated inner tube 2 to preheat the gangue particles. The smoke ash produced by the combustion of the gangue particles is discharged from the discharge port 22, naturally falls into the outer cylinder 1, and is then discharged from the slag discharge port 11. The slag discharge port 11 is adjacent to the discharge port 22, thereby shortening the distance between the discharge port 22 and the slag discharge port 11, shortening the movement path of the smoke ash discharge, and ensuring smooth slag discharge of the gangue incineration device 100.

[0040] existFigure 1 In the illustrated embodiment, the feed port 21 is located on the left side of the inner tube 2, the discharge port 22 is located on the right side of the inner tube 2, and the smoke exhaust port 12 is located on the left side of the inner tube 2. A high-temperature flue gas flow path is formed from the discharge port 22 to the smoke exhaust port 12, running from right to left. Gangue particles enter the inner tube 2 from the left side, and the high-temperature flue gas and ash generated by the combustion of the gangue particles are discharged from the right side of the inner tube 2. Combustion of the gangue particles does not begin in the initial stage of entry into the inner tube 2 (i.e., at the left end of the inner tube 2), but is fully burned by the time the particles exit the inner tube 2 (at the right end of the inner tube 2). Therefore, the temperature at the left end of the inner tube 2 is lower than that at the right end. The high-temperature flue gas discharged from the combustion flows from right to left, covering most of the area of ​​the inner tube 2 in its length direction (extension direction), especially the left area of ​​the inner tube 2, so that the high-temperature flue gas can heat the inner tube 2, especially the left side of the inner tube 2, and can make the temperature of the left wall of the inner tube 1 reach 700°C, so as to heat the combustion chamber 20, thereby preheating the coal gangue particles that have not started to burn after entering the inner tube 2, promoting the combustion of the coal gangue, and then burning after the coal gangue encounters air.

[0041] The gangue incineration device 100 of the embodiment of the present invention is configured such that the outer cylinder 1 is placed outside the inner cylinder 2 to form a flow chamber 10, and the smoke exhaust port 12 and the material discharge port 22 are respectively placed at both ends of the inner cylinder 2, so that the high-temperature flue gas generated by the combustion of the gangue particles is discharged from the material discharge port 22 and flows through the outer wall surface of the inner cylinder 2 during the flow toward the smoke exhaust port 12, thereby heating the inner cylinder 2 and then heating the combustion chamber 20, thereby preheating the gangue particles, increasing the temperature of the gangue particles, promoting the combustion of the gangue particles, and at the same time keeping the combustion chamber 20 at a higher temperature to achieve self-stable combustion of the gangue particles.

[0042] Therefore, the gangue incineration device 100 of the embodiment of the present invention uses the high-temperature flue gas generated by the combustion of gangue particles to preheat the gangue particles and the combustion chamber 20, so that the combustion chamber 20 is maintained at a relatively high temperature, ensuring the stable combustion of the gangue particles without the need to mix other fuels. At the same time, the lower limit of the calorific value of the gangue that can be burned is reduced, so that gangue with a calorific value higher than 600kcal / kg can also be directly burned to recover its heat.

[0043] Specifically, an insulation layer is provided on the inner wall of the outer tube 1, or a liquid cooling pipe is laid on the inner wall of the outer tube 1 to recover part of the heat of the high-temperature flue gas using the liquid in the liquid cooling pipe.

[0044] In some embodiments, the inner cylinder 2 includes a cylinder body 23 and a feed pipe 24. The cylinder body 23 defines a combustion chamber 20. One end of the feed pipe 24 forms a feed port 21. The other end of the feed pipe 24 is connected to the cylinder body 23, and the feed pipe 24 is in communication with the combustion chamber 20. Gangue particles enter the combustion chamber 20 through the feed pipe 24. The feed pipe 24 is rotatably mounted on the outer cylinder 1, i.e., the inner cylinder 2 is rotatably connected to the outer cylinder 1 via the feed pipe 24.

[0045] A portion of the feed pipe 24 is located inside the outer tube 1, and this portion of the feed pipe 24 is within the range covered by the flow cavity 10, so that the high-temperature flue gas can flow through this portion of the feed pipe 24. The high-temperature flue gas can heat the feed pipe 24, and then preheat the gangue particles passing through the feed pipe 24, thereby increasing the temperature of the gangue particles entering the combustion chamber 20, thereby further increasing the temperature of the gangue particles, further promoting the combustion of the gangue particles, and further ensuring the self-stable combustion of the gangue particles.

[0046] Specifically, a first sealed bearing (not shown in the figure) is provided between the feed pipe 24 and the outer cylinder 1 .

[0047] Furthermore, the support beam 3 is fixedly connected to the cylinder 23, rotating synchronously with the inner cylinder 2. One end (the left end) of the support beam 3 passes through the feed pipe 24. The support beam 3 is equipped with a feed screw section 31, which faces the feed port 21. As the support beam 3 rotates with the inner cylinder 2, the feed screw section 31 transports the gangue particles into the cylinder 23, completing the feeding of the gangue particles.

[0048] Specifically, the gangue incineration device 100 further includes a support rod 4, which connects the support beam 3 and the cylinder body 23 of the inner cylinder 2. The support rod 4 and the support beam 3 are both made of high temperature resistant material.

[0049] The other end (right end) of the support beam 3 is located outside the outer tube 1 and is used to connect to the air source. In a preset direction, the other end of the support beam 3 is located on the side of the outer tube 1 away from the smoke exhaust port 12, that is, the other end of the support beam 3 is located on the right side of the outer tube 1. Air enters the support beam 3 from the right side of the support beam 3 and then enters the combustion chamber 20 through the support beam 3. The air flow path is from right to left, flowing through the right side of the flow cavity 10. The high-temperature flue gas on the right side of the flow cavity 10 exchanges heat with the support beam 3, heating the air before entering the combustion chamber 20, thereby increasing the temperature of the air, that is, increasing the temperature of the air i used for the combustion of the coal gangue particles, and then further promoting the combustion of the coal gangue particles, further ensuring the self-stable combustion of the coal gangue particles.

[0050] Specifically, a second sealed bearing (not shown) is provided at the right end of support beam 3, which is mounted on outer cylinder 1. Support beam 3 is rotatably connected to outer cylinder 1. A Roots blower or high-pressure air is connected to the right end of support beam 3, thereby blowing air into inner cylinder 2 through the ventilation channel.

[0051] Furthermore, the support beam 3 is provided with a plurality of air outlets 33, which are connected to the ventilation channel. The plurality of air outlets 33 allows the support beam 3 to form multiple air inlet points within the combustion chamber 20, which facilitates the uniform distribution of air in the area where the gangue particles are burning, thereby ensuring the stability of the gangue combustion.

[0052] In some embodiments, in this preset direction, multiple air outlets 33 are located in the middle of the combustion chamber 20 and on one side adjacent to the discharge port 22. That is, multiple air outlets 33 are distributed in the middle and right sides of the combustion chamber 20. The middle and right sides of the combustion chamber 20 are oxygen-rich, and the gangue particles burn in the middle and right sides of the combustion chamber 20 to form a combustion zone. This leaves a certain amount of space on the left side of the combustion chamber 20 for preheating the gangue particles, ensuring that the temperature of the gangue particles rises to above 600°C before combustion, thereby ensuring self-stable combustion of the gangue particles after entering the combustion zone and encountering air.

[0053] In some embodiments, the gangue incineration device 100 further includes an air duct (not shown), which is disposed on the support beam 3 and communicates with the air outlet 33. The air duct has a certain length, one end of which is communicated with the air outlet 33, and the other end of which can extend into the bottom layer of the combustion area, thereby delivering air into the material layer adjacent to the inner wall of the cylinder 23, providing oxygen for the combustion of the gangue particles located deep therein, thereby ensuring sufficient combustion of the gangue particles.

[0054] Specifically, such as Figure 1 As shown, the distance between the leftmost air outlet 33 and the feed pipe 24 is 2-5 meters. The end of the air duct is 5-20 cm away from the inner wall of the inner tube 2, where the thickness of the coal gangue particle layer in the inner tube 2 is greater than 10 cm. The outlet wind speed of the air outlet 33 or the air duct is 10-50 m / s.

[0055] In some embodiments, the support beam 3 is provided through the discharge port 22, and the air entering the combustion chamber 20 through the right side of the support beam 3 passes through the discharge port 22. On the one hand, the high-temperature gas pressure of the discharge port 22 is relatively large, which can quickly and efficiently heat the support beam 3 and heat the air in the support beam 3, thereby improving the preheating effect of the air and increasing the temperature of the air entering the combustion chamber 20, thereby further promoting the combustion of the coal gangue particles and further ensuring the self-stable combustion of the coal gangue particles.

[0056] The support beam 3 is provided with a discharging screw section 32 opposite to the discharging port 22. The support beam 3 rotates synchronously with the inner cylinder 2, and the discharging screw section 32 transports the fly ash generated after the combustion of the coal gangue particles to the outside of the cylinder body 23.

[0057] Further, the inner cylinder 2 forms a converging port at the discharging port 22, that is, the diameter of the discharging port 22 is smaller than the diameter of the cylinder body 23. The discharging port 22 has a gradually reduced diameter, as shown in Figure 1 The discharging port 22 with the gradually reduced diameter reduces the discharging speed of the coal gangue material, increases the residence time of the coal gangue in the cylinder body 23, and further increases the high-temperature combustion time of the coal gangue, thereby ensuring the full combustion of the coal gangue particles.

[0058] The coal gangue incineration device 100 further comprises a plurality of collision balls (not shown in the figure) located in the combustion chamber 20. During the rotation of the inner cylinder 2, the plurality of collision balls roll and collide in the inner cylinder 2. When the collision balls collide with the coal gangue particles, they not only further reduce the particle size of the coal gangue particles, but also knock off the fly ash attached to the surface of the coal gangue particles, so that the unburned coal gangue particles continue to participate in the combustion, thereby further ensuring the full combustion of the coal gangue particles.

[0059] Specifically, the collision balls are iron balls.

[0060] Specifically, the outer cylinder 1 and the cylinder body 23 are each provided with an access door, through which the collision balls can be put into or taken out of the combustion chamber 20, and through which personnel can enter the inside of the outer cylinder 1 (flowing cavity 10) or the inside of the cylinder body 23 (combustion chamber 20) for maintenance.

[0061] In some embodiments, the coal gangue incineration device 100 of the present embodiment comprises a material guiding structure arranged on the inner wall surface of the cylinder body 23 of the inner cylinder 2. The material guiding structure rotates with the inner cylinder 2, thereby being able to drive the material in the combustion chamber 20 to move from the feeding port 21 to the discharging port 22. The arrangement of the material guiding structure facilitates the control of the residence time of the coal gangue particles in the combustion chamber 20.

[0062] In some embodiments, there is an included angle between the preset direction and the horizontal direction, the discharging port 22 is located at the lower end of the inner cylinder 2, and the slag discharge port 11 is located at the lower end of the outer cylinder 1. During the rotation of the inner cylinder 2, the material in the inner cylinder 2 constantly rolls and moves with the inner cylinder 2, and the material as a whole moves from the feeding port 21 to the discharging port 22. The fly ash discharged from the discharging port 22 naturally falls into the outer cylinder 1 and is discharged from the slag discharge port 11 at the lower end of the outer cylinder 1, ensuring the smooth discharge of the coal gangue incineration device 100 and ensuring that the residence time of the coal gangue particles in the combustion chamber exceeds 30 minutes.

[0063] As Figure 1As shown, the slag discharge port 11 is located below the discharge port 22 , and the soot discharged from the discharge port 22 falls into the slag discharge port 11 and is discharged from the slag discharge port 11 .

[0064] In some other embodiments, the preset direction is parallel to the horizontal direction, that is, the inner cylinder 2 is in a horizontal state.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0067] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0068] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0069] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0070] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A gangue incineration device (100), characterized in that: include: An outer cylinder (1), wherein the outer cylinder (1) is provided with a slag discharge port (11) and a smoke discharge port (12); An inner cylinder (2), the inner cylinder (2) being arranged inside the outer cylinder (1) and being rotatably connected to the outer cylinder (1), a flow cavity (10) being formed between the inner cylinder (2) and the outer cylinder (1), the inner cylinder (2) having a combustion chamber (20), a feed port (21) and a discharge port (22) being respectively provided at both ends of the inner cylinder (2) in a preset direction, the combustion chamber (20) being connected to the flow cavity (10) through the discharge port (22), the discharge port (22) being away from the smoke exhaust port (12) in the preset direction, and the discharge port (22) being adjacent to the slag discharge port (11) in the preset direction; A support beam (3) is provided on the outer tube (1) and the inner tube (2), and a ventilation channel is provided inside the support beam (3), and the ventilation channel is connected to the combustion chamber (20) to allow air to enter the combustion chamber (20).

2. The gangue incineration device (100) according to claim 1, characterized in that: The inner cylinder (2) includes a cylinder body (23) and a feed pipe (24), wherein the cylinder body (23) defines the combustion chamber (20), one end of the feed pipe (24) forms the feed port (21), and the other end of the feed pipe (24) is connected to the cylinder body (23), and the feed pipe (24) is rotatably arranged on the outer cylinder (1), and a portion of the feed pipe (24) is located inside the outer cylinder (1).

3. The gangue incineration device (100) according to claim 2, characterized in that: The support beam (3) is fixedly connected to the cylinder (23), one end of the support beam (3) is passed through the feed pipe (24), and a feed spiral section (31) is provided on the support beam (3), and the feed spiral section (31) is opposite to the feed port (21).

4. The gangue incineration device (100) according to claim 1, characterized in that: The other end of the support beam (3) is located outside the outer tube (1), and the other end of the support beam (3) is located on a side of the outer tube (1) away from the smoke exhaust port (12) in the preset direction.

5. The gangue incineration device (100) according to claim 1, characterized in that: The support beam (3) is passed through the discharge port (22), the support beam (3) is fixedly connected to the inner tube (2), and a discharge spiral section (32) is provided on the support beam (3), and the discharge spiral section (32) is opposite to the discharge port (22).

6. The gangue incineration device (100) according to claim 1, characterized in that: The support beam (3) is provided with a plurality of air outlets (33), and the air outlets (33) are communicated with the ventilation channel.

7. The gangue incineration device (100) according to claim 6, characterized in that: In the preset direction, the plurality of air outlets (33) are located in the middle of the combustion chamber (20) and on one side adjacent to the discharge port (22); And / or, the gangue incineration device (100) further comprises an air duct, wherein the air duct is provided on the support beam (3) and communicates with the air outlet (33).

8. The gangue incineration device (100) according to claim 1, characterized in that: It further comprises a support rod (4), wherein the support rod (4) connects the support beam (3) and the inner tube (2); And / or, the gangue incineration device (100) further comprises a plurality of collision balls, wherein the collision balls are located in the combustion chamber (20); And / or, there is an angle between the preset direction and the horizontal direction, the discharge port (22) is located at the lower end of the inner cylinder (2), and the slag discharge port (11) is located at the lower end of the outer cylinder (1); And / or, further comprising a material guiding structure, wherein the material guiding structure is arranged on the inner wall surface of the inner cylinder (2).

9. A coal gangue incineration system, characterized in that: include: Crushing device; and A gangue incineration device (100), wherein the gangue incineration device (100) is the gangue incineration device (100) according to any one of claims 1 to 8, and the feed port (21) is connected to the discharge port of the crushing device.

10. A method for burning coal gangue, characterized in that: The gangue incineration system according to claim 9 is used to crush gangue with a calorific value of more than 600 kcal / kg to a particle size of less than or equal to 10 mm, and then the crushed gangue is sent to a gangue incineration device (100) for incineration.

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