A rotary kiln for waste treatment

Abstract

The present application provides a rotary kiln for waste treatment, which relates to the technical field of rotary kilns. A rotary kiln for waste treatment includes a kiln body, and sealing mechanisms are respectively connected to both ends of the kiln body. One end of the sealing mechanism is a static part and the other end is a dynamic part. The static part is externally connected to a gas supply device. Two pressure regulating components are coaxially arranged inside the dynamic part. An auxiliary sealing mechanism is arranged on the outer side of the end of the static part facing the dynamic part. A plurality of hydraulic cylinders are circumferentially and evenly arranged between the static part and the dynamic part. By using the externally connected gas supply device to input air flow into the static part, the air flow sprays out between the static part and the dynamic part and from the dynamic part to form an air curtain to achieve sealing. The pressure regulating components achieve stable air pressure to ensure the stability of the formed air curtain. The axial movement amount of the kiln body is flexibly buffered by using the pressure regulating components and the hydraulic cylinders, and the auxiliary sealing mechanism is used to prevent the sealing performance of the sealing mechanism from decreasing due to axial yaw.

Description

Technical Field

[0001] The present application relates to the technical field of rotary kilns, and in particular to a rotary kiln for waste treatment. Background Art

[0002] When the rotary kiln is treating waste, it will produce various harmful gases and harmful dust. If the sealing performance of the rotary kiln is not good, these harmful gases and dust will leak into the surrounding environment, causing serious air pollution and endangering human health; at the same time, it will also cause heat loss in the kiln, making it difficult to maintain the temperature in the kiln at the required level, affecting the waste treatment effect and aggravating energy loss.

[0003] In the prior art, labyrinth seals, lamination seals, packing seals, etc. are usually used to seal the drum and the end of the rotary kiln. However, in actual applications, due to the large size and weight of the rotary kiln, the diverse environment, complex working conditions, harsh conditions, and the strong system dependence and time-varying nature of the operation process, a certain amount of jumping, swinging, axial movement, etc. will occur during operation, resulting in difficulty in achieving good sealing performance at the connection between the rotating part (kiln body) and the end of the rotary kiln. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a rotary kiln for waste treatment, comprising a base, on which a kiln body is rotatably supported, two ends of the kiln body are respectively connected with a kiln head end and a kiln tail end, the kiln head end and the kiln tail end are respectively fixed to the base, two ends of the kiln body are respectively coaxially connected with the kiln head end and the kiln tail end with a sealing mechanism, the end of the sealing mechanism away from the kiln body is a static part, the end of the sealing mechanism facing the kiln body is a dynamic part, the dynamic part is coaxially sealed and rotatably plugged into the static part; the inner side of the static part is sealed and rotatably connected to the kiln body; the static part is externally connected to an air supply device, and the gas from the air supply device to the static part is discharged from the static part which is sleeved on the outside of the dynamic part and the outer wall of the dynamic part and forms an air curtain at the discharge point; the dynamic part is connected to the kiln body through a kiln head end and a kiln tail end, and the kiln head end is connected to the kiln body through a kiln head end and a kiln tail end, and the kiln body ... Two pressure regulating components are coaxially arranged inside the static part, one of which is used to adjust the pressure inside the dynamic part, and the other is used to adjust the amount of gas discharged from the outer wall of the dynamic part; an auxiliary sealing mechanism is arranged on the outer side of the static part toward one end of the dynamic part, the auxiliary sealing mechanism elastically expands and contracts along the radial direction of the kiln body, and the auxiliary sealing mechanism is used to enhance the sealing performance between the static part and the dynamic part when the kiln body undergoes axial deflection; a plurality of hydraulic cylinders are evenly arranged circumferentially between the static part and the dynamic part, the hydraulic cylinder is fixedly connected to the auxiliary sealing mechanism, a spherical part is fixedly connected to the piston end of the hydraulic cylinder, the spherical part is slidably embedded in the dynamic part, and the hydraulic cylinder is used to limit the axial movement of the kiln body.

[0005] Preferably, the static part includes a fixed cover, an outer cylinder, an inner cylinder, and an end ring, wherein the fixed cover is arranged in an annular shape as a whole, and the cross-section of the fixed cover along the axial direction of the rotary kiln is divided into three sections, namely vertical, transverse and inclined sections, wherein the vertical section is fixedly connected to the kiln head end or the kiln tail end, wherein the transverse section is fixedly connected to the vertical section and the end of the inclined section close to the axis, and the side of the inclined section away from the transverse section is connected to the kiln body in a rotational sealing connection; the outer cylinder is coaxially fixedly connected to the vertical section of the fixed cover, and the outer cylinder is located between the outer diameter and the inner diameter of the fixed cover; the inner cylinder is coaxially fixedly connected to the vertical section of the fixed cover, and the inner cylinder is located on the inner side of the outer cylinder, and the cross-section of the inner cylinder is arranged in an L shape; the end ring is coaxially fixedly connected to the end of the outer cylinder away from the vertical section of the fixed cover, and the inner diameter of the end ring is consistent with the inner diameter of the outer cylinder.

[0006] Preferably, a plurality of air inlet ends are evenly connected circumferentially on the side wall of the outer cylinder, and the plurality of air inlet ends are externally connected to the same air supply device; a plurality of end surface slide grooves are evenly arranged circumferentially on the side of the end ring away from the outer cylinder, and the plurality of end surface slide grooves are arranged radially along the end ring.

[0007] Preferably, the dynamic part includes a fixed ring, an outer ring tube, an inner ring tube, a sealing ring, a uniform flow ring, a balancing ring and a balance ring. The fixed ring is coaxially fixed to the end face of the kiln body, and an arc groove is coaxially arranged on the fixed ring, and the arc groove is adapted to the spherical part; the outer ring tube is coaxially fixed to the fixed ring, and the cross-section of the outer ring tube is F-shaped, the protrusion on the outer ring tube and the inner wall of the outer tube are rotatably matched, and a plurality of external recesses are staggered on the outer wall of the protrusion of the outer ring tube, and a plurality of air outlet holes are evenly arranged on the circumference of the side of the outer ring tube away from the protrusion, and the plurality of air outlet holes are arranged in double rows along the axial direction of the outer ring tube; an axial retaining ring is coaxially fixed to the side of the fixed ring away from the kiln body, and the axial retaining ring covers two rows of air outlet holes; the inner ring tube is coaxially arranged at On the inner side of the outer ring tube, the cross-section of the inner ring tube is F-shaped, the protrusion on the inner ring tube is rotatably matched with the inner tube, and a plurality of inner recesses are staggered on the outer wall of the protrusion of the inner ring tube; the sealing ring is coaxially fixed to the outer ring tube and the inner ring tube; the flow-uniform ring is embedded in the protrusion on the outer side of the outer ring tube, the cross-section of the flow-uniform ring is symmetrically shaped like a mountain, the center of the outer wall of the flow-uniform ring is convex outward, and the two sides of the outer wall of the flow-uniform ring are concave arc-shaped; the balancing ring is coaxially sealed and limitedly slidably connected between the outer ring tube and the inner ring tube, and compressed gas is filled between the balancing ring and the sealing ring; the balancing ring coaxially elastically slides between the outer ring tube and the inner tube, and a plurality of flow grooves are evenly arranged circumferentially on the side of the balancing ring facing the inner tube.

[0008] Preferably, the protrusion on the outer ring tube is two coaxially arranged outer convex rings, the uniform flow ring is embedded between the two outer convex rings, the outer recessed portions are circumferentially evenly arranged on the outer walls of the two outer convex rings, the outer recessed portions on the two outer convex rings are staggered with each other, and an upper spacer ring is coaxially fixed on the inner wall of the outer ring tube for limiting the axial displacement of the balance ring, and the outer ring tube is coaxially fixed with a limiting ring between the two rows of the air outlet holes, and the limiting ring is used to limit the axial displacement of the balance ring.

[0009] Preferably, the protrusions on the inner ring tube are two coaxially arranged inner convex rings, the inner recessed portions are circumferentially evenly arranged on the outer walls of the two inner convex rings, the inner recessed portions on the two inner convex rings are staggered with each other, and a lower spacer ring is coaxially fixed to the inner wall of the inner ring tube, and the lower spacer ring corresponds to the upper spacer ring.

[0010] Preferably, the portion protruding outward from the center of the outer wall of the uniform flow ring is a raised end, and a plurality of inclined grooves are circumferentially arranged on the raised end. The inclined grooves are symmetrically arranged and are arranged in a herringbone shape on the raised end.

[0011] Preferably, a plurality of guide rods are uniformly slidably inserted on the side wall of the balancing ring in a circumferential direction, and the two ends of the guide rods are respectively fixed to the fixing ring and the sealing ring. A reset spring is sleeved on the guide rods, and the two ends of the reset spring are respectively abutted against the fixing ring and the balancing ring.

[0012] Preferably, the auxiliary sealing mechanism includes a clamping ring, a plurality of elastic telescopic parts and a plurality of arc-shaped sealing plates, the clamping ring is coaxially fixed to the end ring, and a plurality of end face slide grooves 2 that match the end face slide groove 1 are evenly arranged circumferentially on the side of the clamping ring facing the end ring, and an annular space is left between the clamping ring and the end ring; a plurality of elastic telescopic parts are evenly arranged circumferentially on the side of the clamping ring away from the end ring, and the elastic telescopic parts include a fixed end fixed to the clamping ring and a telescopic end elastically inserted into the fixed end; a plurality of arc-shaped sealing plates form a ring, and a plurality of arc-shaped sealing plates are sealingly and slidably inserted in the annular space between the clamping ring and the end ring, a U-shaped end is provided at one end of the arc-shaped sealing plate, and one end of the arc-shaped sealing plate is slidably inserted in the U-shaped end of the adjacent arc-shaped sealing plate, the arc-shaped sealing plate abuts against the outer ring tube, and a plurality of air outlet grooves are evenly arranged on the side of the arc-shaped sealing plate facing the outer ring tube, and the air outlet grooves are inclined.

[0013] Preferably, an airflow resistance component is arranged between the outer convex ring and the arc-shaped sealing plate, and the airflow resistance component includes multiple blocking rings, multiple sliding rods and multiple elastic members. The multiple blocking rings are of the same size, the multiple blocking rings are spaced apart, and the multiple blocking rings are staggered in the radial direction. The multiple blocking rings form a circuitous airway between the outer convex ring and the arc-shaped sealing plate; the multiple sliding rods are evenly arranged circumferentially, the sliding rods are slidably inserted in the multiple blocking rings, and one end of the sliding rod is slidably inserted in the outer convex ring; the multiple elastic members are sleeved on the sliding rod, and the multiple elastic members and the multiple blocking rings are spaced apart.

[0014] The beneficial effects of the present invention are:

[0015] 1. Use an external air supply device to input air into the static part, and the air is ejected from between the static part and the dynamic part and from the dynamic part to form an air curtain to achieve sealing between the dynamic part and the static part, and prevent foreign matter such as dust from outside from affecting the sealing between the dynamic part and the static part;

[0016] 2. Use the two pressure regulating components in the dynamic part to achieve the stability of the air pressure input from the external air supply device to the static part, and the stability of the air volume output from one side of the dynamic part, so as to ensure the stability of the formed air curtain;

[0017] 3. Use the axial displacement of the pressure regulating component in the dynamic part and the hydraulic cylinder to flexibly buffer the axial movement of the kiln body to avoid damage to the sealing mechanism caused by rigid impact;

[0018] 4. The elastic expansion and contraction of the auxiliary sealing mechanism in the radial direction is utilized to improve the sealing effect of the entire sealing device when the kiln body deflects axially, so as to avoid the reduction of the sealing performance of the sealing mechanism caused by the axial deflection.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the implementation methods of the present application, the drawings required for use in the implementation methods will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic diagram of the overall structure of a rotary kiln for waste treatment according to an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of the position of a sealing mechanism according to an embodiment of the present application;

[0023] Figure 3 is a cross-sectional view of a sealing mechanism according to an embodiment of the present application;

[0024] Figure 4 According to the embodiment of the present application Figure 3 A is an enlarged schematic diagram;

[0025] Figure 5 is a structural exploded diagram of a sealing mechanism according to an embodiment of the present application;

[0026] Figure 6 is an exploded view of the local structure of the static part and local components thereon according to an embodiment of the present application;

[0027] Figure 7 According to the embodiment of the present application Figure 6 A magnified schematic diagram of B;

[0028] Figure 8 According to the embodiment of the present application Figure 6 A magnified schematic diagram of middle C;

[0029] Fig. 9 is a schematic structural diagram of a flow-uniform ring according to an embodiment of the present application;

[0030] Fig.10 According to the embodiment of the present application Fig. 9 A magnified schematic diagram of D in the middle;

[0031] Fig.11 is an exploded view of the local structure of the dynamic part according to an embodiment of the present application;

[0032] Fig.12 According to the embodiment of the present application Fig.11 Middle E is an enlarged schematic diagram;

[0033] Fig.13 According to the embodiment of the present application Fig.11 Middle F is an enlarged schematic diagram;

[0034] Fig.14 is a schematic diagram of a partial structure of a clamping ring according to an embodiment of the present application;

[0035] Fig.15 is a schematic diagram of a partial structure of an arc-shaped sealing plate according to an embodiment of the present application;

[0036] Fig.16 Schematic diagram of the position of the airflow spoiler according to the embodiment of the present application Figure 1 ;

[0037] Fig.17 Schematic diagram of the position of the airflow spoiler according to the embodiment of the present application Figure 2 ;

[0038] Fig.18 According to the embodiment of the present application Fig.17 Enlarged schematic diagram of G in the figure.

[0039] Icons: 1. Base; 2. Kiln body; 21. Kiln head end; 22. Kiln tail end; 3. Static part; 31. Fixed cover; 32. Outer cylinder; 321. Air inlet end; 33. Inner cylinder; 34. End ring; 341. End face slide groove 1; 35. Air flow resistance component; 351. Blocking ring; 352. Slide rod; 353. Elastic member; 4. Dynamic part; 41. Fixed ring; 411. Axial blocking ring; 42. Outer ring cylinder; 421. Outer convex ring; 422. Outer concave part; 423. Upper spacer ring; 424. Limiting ring; 425. Air outlet; 43. Inner ring cylinder; 431. Inner convex ring; 432. Inner concave part; 433. Lower spacer ring ;44. Sealing ring;45. Flow-uniforming ring;451. Raised end;452. Inclined groove;46. Balancing ring;47. Equalizing ring;471. Flow groove;472. Guide rod;473. Reset spring;5. Auxiliary sealing mechanism;51. Snap ring;511. End face slide groove II;52. Elastic telescopic part;521. Fixed end;522. Telescopic end;53. Arc sealing plate;531. U-shaped end;532. Air outlet groove;6. Hydraulic cylinder;61. Spherical part;7. Cover sealing assembly;71. Triangular sealing part;72. Guide rod;73. Sealing spring;8. Airflow spoiler;81. Middle retaining ring;82. Guide strip. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0041] In order to make the purpose, technical solutions and advantages of the implementation methods of this application clearer, the technical solutions in the implementation methods of this application will be clearly and completely described below in conjunction with the drawings in the implementation methods of this application. Obviously, the described implementation methods are part of the implementation methods of this application, not all of the implementation methods. Based on the implementation methods in this application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] Embodiment 1, as Figure 1-Figure 18 As shown, a rotary kiln for waste treatment according to an embodiment of the present application includes a base 1, on which a kiln body 2 is rotatably supported, and two ends of the kiln body 2 are respectively connected to a kiln head end 21 and a kiln tail end 22, and the kiln head end 21 and the kiln tail end 22 are respectively fixed to the base 1.

[0043] It should be noted that the specific structures and working principles of the kiln body 2, the kiln head end 21 and the kiln tail end 22 are prior art and will not be described in detail herein.

[0044] In a specific embodiment of the present application, a sealing mechanism is coaxially connected between the two ends of the kiln body 2 and the kiln head end 21 and the kiln tail end 22, respectively. The end of the sealing mechanism away from the kiln body 2 is the static part 3, and the end of the sealing mechanism facing the kiln body 2 is the dynamic part 4. The dynamic part 4 is coaxially sealed and rotatably plugged into the static part 3. It can be understood that in actual use, the dynamic part 4 rotates with the kiln body 2 and rotates inside the static part 3, achieving a rotational and sealed connection effect, avoiding the leakage of harmful gases and dust into the surrounding environment during the operation of the kiln body 2, which will cause serious air pollution and endanger human health, and at the same time avoiding heat loss in the kiln, which makes it difficult to maintain the temperature in the kiln at the required level, affecting the waste treatment effect, and aggravating energy loss due to poor sealing.

[0045] It should be noted that the inner side of the static part 3 is sealed and rotatably connected to the kiln body 2, so that the material inside the kiln body 2 will not enter the static part 3 and the dynamic part 4, thereby protecting the sealing performance between the static part 3 and the dynamic part 4 from the inside.

[0046] In a specific embodiment of the present application, the static part 3 is externally connected to an air supply device, and the gas from the air supply device to the static part 3 is discharged from the static part 3 which is sleeved on the outside of the dynamic part 4 and the outer wall of the dynamic part 4, and an air curtain is formed at the discharge point. It can be understood that the air supply device continuously inputs gas of a fixed pressure into the static part 3, so that a continuous air curtain is formed at the air flow outlets (2 places) arranged between the static part 3 and the dynamic part 4, and the air curtain is used to achieve sealing from the outside of the static part 3 and the dynamic part 4, and at the same time, it can prevent foreign matter from the outside from threatening the sealing performance between the static part 3 and the dynamic part 4.

[0047] Among them, two pressure regulating components are coaxially arranged inside the dynamic part 4, and one of the pressure regulating components is used to adjust the pressure inside the dynamic part 4. Once a certain amount of axial movement occurs in the kiln body 2 during operation, the pressure regulating component adjusts the pressure values ​​inside the static part 3 and the dynamic part 4 through its own axial displacement in the dynamic part 4 to avoid unstable air flow pressure. At the same time, during the adjustment of the air pressure, a certain degree of flexible buffering is provided for the axial movement to avoid damage between the static part 3 and the dynamic part 4 caused by rigid contact, thereby affecting the sealing performance between the two.

[0048] Another pressure regulating component is used to adjust the amount of gas discharged from the outer wall of the dynamic part 4. It can be understood that the axial displacement of the pressure regulating component can achieve the stability of the air pressure, avoiding the instability of the air curtain at the dynamic part 4, which causes the sealing effect here to decrease.

[0049] It should be noted that an auxiliary sealing mechanism 5 is provided on the outer side of the static part 3 toward one end of the dynamic part 4. The auxiliary sealing mechanism 5 elastically expands and contracts along the radial direction of the kiln body 2. The auxiliary sealing mechanism 5 is used to enhance the sealing performance between the static part 3 and the dynamic part 4 when the kiln body 2 undergoes axial deflection.

[0050] A plurality of hydraulic cylinders 6 are evenly arranged circumferentially between the static part 3 and the dynamic part 4. The hydraulic cylinder 6 is fixedly connected to the auxiliary sealing mechanism 5. A spherical member 61 is fixedly connected to the piston end of the hydraulic cylinder 6. The spherical member 61 is slidably embedded in the dynamic part 4. The hydraulic cylinder 6 is used to limit the axial movement of the kiln body 2.

[0051] Specifically, Figure 4-Figure 6 As shown, the static part 3 includes a fixed cover 31 , an outer cylinder 32 , an inner cylinder 33 , and an end ring 34 .

[0052] Among them, the fixed cover 31 is arranged in an annular shape as a whole, and the cross-section of the fixed cover 31 along the axial direction of the rotary kiln is divided into three sections: vertical, transverse and inclined. The vertical section is fixedly connected to the kiln head end 21 or the kiln tail end 22, the transverse section is fixedly connected to the vertical section and the end of the inclined section close to the axis, and the side of the inclined section away from the transverse section is rotatably sealed and connected to the kiln body 2. It can be understood that the setting of the inclined section enables the kiln head end 21 or the kiln tail end 22 to form a connection with a gradually changing diameter with the kiln body 2, and the transverse section and the inclined section protect the static part 3 and the dynamic part 4 from the inside, thereby preventing the material inside the kiln body 2 from penetrating and interfering with the sealing relationship between the static part 3 and the dynamic part 4.

[0053] It should be noted that, in the specific embodiment of the present application, the end of the inclined section facing the kiln body 2 is made of deformable wear-resistant material, and the part of the inclined section close to the kiln body 2 is evenly arranged in the circumferential direction into a plurality of mutually superimposed laminations (not shown in the figure), so that when the kiln body 2 undergoes axial deflection, the end of the inclined section facing the kiln body 2 has a certain deformation ability to avoid rigid contact and damage to the fixed cover 31.

[0054] The outer cylinder 32 is coaxially fixed to the vertical section of the fixed cover 31, and the outer cylinder 32 is located between the outer diameter and the inner diameter of the fixed cover 31; the inner cylinder 33 is coaxially fixed to the vertical section of the fixed cover 31, and the inner cylinder 33 is located on the inner side of the outer cylinder 32. The cross section of the inner cylinder 33 is L-shaped. Figure 4 and Figure 6 It can be seen that an annular space is formed between the outer cylinder 32 and the inner cylinder 33 .

[0055] The end ring 34 is coaxially fixed to one end of the outer cylinder 32 away from the vertical section of the fixed cover 31 , and the inner diameter of the end ring 34 is consistent with the inner diameter of the outer cylinder 32 .

[0056] like Figure 4-Figure 6 As shown, a plurality of air inlet ends 321 are evenly connected circumferentially on the side wall of the outer cylinder 32, and the plurality of air inlet ends 321 are externally connected to the same air supply device; a plurality of end surface slide grooves 341 are evenly arranged circumferentially on the side of the end ring 34 away from the outer cylinder 32, and the plurality of end surface slide grooves 341 are arranged along the radial direction of the end ring 34.

[0057] In the specific embodiments of the present application, Figure 4-Figure 6 , Figure 9-13 As shown, the dynamic part 4 includes a fixing ring 41 , an outer ring cylinder 42 , an inner ring cylinder 43 , a sealing ring 44 , a flow-uniforming ring 45 , a balancing ring 46 and a balance ring 47 .

[0058] The fixing ring 41 is coaxially fixed to the end surface of the kiln body 2, and an arc groove is coaxially arranged on the fixing ring 41, and the arc groove is matched with the spherical member 61. It should be noted that, if Figure 4As shown, the arc groove is arranged in an annular shape as a whole, and the cross-section of the arc groove is larger than the cross-section of the spherical member 61 embedded in the arc groove. It can be understood that once the kiln body 2 has an axial deflection, it will synchronously drive the fixed ring 41 to have a synchronous axial deflection. At this time, because the cross-section of the arc groove is larger than the cross-section of the spherical member 61 embedded in the arc groove, there will be no motion interference between the spherical member 61 and the fixed ring 41. At the same time, the existence of the arc groove can suppress the axial deflection to a certain extent through the ring formed by multiple spherical members 61.

[0059] The outer ring tube 42 is coaxially fixed to the fixed ring 41, and the cross-section of the outer ring tube 42 is F-shaped. The protrusions on the outer ring tube 42 are rotatably matched with the inner wall of the outer tube 32. It should be noted that in the specific embodiment of the present application, the protrusions on the outer ring tube 42 are respectively located on both sides of the air inlet end 321. In this way, the airflow input by the external air supply device first enters between the protrusions of the outer ring tube 42. A plurality of external recesses 422 are alternately arranged on the outer wall of the protrusion of the outer ring tube 42. It can be understood that the incoming airflow will escape from the external recesses 422 on the protrusions of the outer ring tube 42 located on both sides of the air inlet end 321 to both sides of the protrusion of the outer ring tube 42.

[0060] like Figure 4 and Fig.13 As shown, a plurality of air outlet holes 425 are evenly arranged on the circumference of the side of the outer ring tube 42 away from the protrusion. The plurality of air outlet holes 425 are arranged in double rows along the axial direction of the outer ring tube 42. It should be noted that the air outlet holes 425 are arranged at an angle.

[0061] like Figure 4 and Fig.11 As shown, an axial retaining ring 411 is coaxially fixed to the side of the fixed ring 41 away from the kiln body 2, and the axial retaining ring 411 covers two exhaust holes 425. It can be understood that when the airflow flows out from the exhaust holes 425, it will hit the inner wall of the axial retaining ring 411 in an inclined shape, and after being blocked by the axial retaining ring 411, it will be ejected from the side away from the fixed ring 41.

[0062] like Figure 4 , Fig.11 and Fig.13 As shown, the inner ring tube 43 is coaxially arranged on the inner side of the outer ring tube 42, and the cross-section of the inner ring tube 43 is F-shaped. The protrusion on the inner ring tube 43 and the inner tube 33 are rotatably matched, and a plurality of inner recesses 432 are staggeredly arranged on the outer wall of the protrusion of the inner ring tube 43. It can be understood that part of the airflow will flow out from the plurality of inner recesses 432.

[0063] It is understandable that, in the present application, the passing airflow will be evenly distributed due to the multiple staggered outer recessed portions 422 .

[0064] In a specific embodiment of the present application, the sealing ring 44 is coaxially fixed to the outer ring tube 42 and the inner ring tube 43 , so that one end of the outer ring tube 42 and the inner ring tube 43 form a closed shape.

[0065] The uniform flow ring 45 is embedded in the protrusion on the outer side of the outer ring tube 42. The cross section of the uniform flow ring 45 is symmetrically shaped like a mountain. The center of the outer wall of the uniform flow ring 45 is convex outward, and the two sides of the outer wall of the uniform flow ring 45 are arranged in an inward concave arc shape. Specifically, the part of the outer wall of the uniform flow ring 45 protruding outward in the center is a convex end 451. A plurality of oblique grooves 452 are arranged circumferentially on the convex end 451. The oblique grooves 452 are symmetrically arranged. The oblique grooves 452 are arranged in a herringbone shape at the convex end 451. It can be understood that When the kiln body 2 rotates, the entire dynamic part 4 will be driven to rotate synchronously in the same direction. In this way, the uniform flow ring 45 will follow the rotation, and the airflow entering from the air inlet end 321 will impact the rotating uniform flow ring 45. The airflow is diverted to both sides under the action of the raised end 451, and is evenly distributed under the action of multiple inclined grooves 452 arranged in a herringbone shape. Further, through the outer recessed parts 422 staggered on both sides, it will flow to the two sides of the protrusion of the outer ring tube 42 as evenly as possible.

[0066] Among them, the balance ring 46 is coaxially sealed and limitedly slidably connected between the outer ring tube 42 and the inner ring tube 43, and compressed gas is filled between the balance ring 46 and the sealing ring 44. It can be understood that when the air pressure on the side of the balance ring 46 away from the sealing ring 44 is greater than the air pressure between the balance ring 46 and the sealing ring 44, the balance ring 46 approaches the sealing ring 44, and vice versa, the balance ring 46 moves away from the sealing ring 44. The axial displacement of the balance ring 46 is used to achieve pressure balance on both sides and a certain flexible buffering effect on the axial movement of the kiln body 2.

[0067] The balance ring 47 coaxially and elastically slides between the outer ring tube 42 and the inner tube 33 . A plurality of flow grooves 471 are evenly arranged in the circumferential direction on one side of the balance ring 47 facing the inner tube 33 .

[0068] It should be noted that in the specific embodiment of the present application, the number of circulation grooves 471 is less than the number of inner single-sided recesses 432, and the number of inner recesses 432 is consistent with the number of outer recesses 422. In this way, when the airflow passes through the circulation grooves 471, it will force the balance ring 47 to undergo axial displacement and form an air curtain here.

[0069] In a specific embodiment of the present application, the protrusion on the outer ring tube 42 is two coaxially arranged outer convex rings 421, the uniform flow ring 45 is embedded between the two outer convex rings 421, the outer recessed portions 422 are respectively and evenly arranged on the outer walls of the two outer convex rings 421, the outer recessed portions 422 on the two outer convex rings 421 are staggered with each other, and an upper spacer ring 423 is coaxially fixedly connected to the inner wall of the outer ring tube 42 for limiting the axial displacement of the balance ring 46, and a limiting ring 424 is coaxially fixedly connected to the outer ring tube 42 between the two exhaust holes 425, and the limiting ring 424 is used to limit the axial displacement of the balance ring 47.

[0070] Furthermore, the protrusions on the inner ring tube 43 are two coaxially arranged inner convex rings 431, and the inner recesses 432 are evenly arranged on the outer walls of the two inner convex rings 431 in the circumferential direction. The inner recesses 432 on the two inner convex rings 431 are staggered with each other, and a lower spacer ring 433 is coaxially fixed on the inner wall of the inner ring tube 43. The lower spacer ring 433 corresponds to the upper spacer ring 423, so as to limit the axial displacement of the balance ring 46.

[0071] like Figure 4 and 12 As shown, a plurality of guide rods 472 are uniformly slidably inserted on the side wall of the balancing ring 47 in the circumferential direction, and the two ends of the guide rods 472 are respectively fixed to the fixed ring 41 and the sealing ring 44. A reset spring 473 is sleeved on the guide rods 472, and the two ends of the reset spring 473 are respectively abutted against the fixed ring 41 and the balancing ring 47, so that the balancing ring 47 can achieve elastic displacement and have a certain reset ability.

[0072] like Figure 4 , Figure 6 , Figure 8 , Fig.14 and Fig.15 As shown, the auxiliary sealing mechanism 5 includes a clamping ring 51, a plurality of elastic telescopic members 52 and a plurality of arc-shaped sealing plates 53. The clamping ring 51 is coaxially fixed to the end ring 34. A plurality of end surface slide grooves 511 matching the end surface slide grooves 341 are evenly arranged on the side of the clamping ring 51 facing the end ring 34, and an annular space is left between the clamping ring 51 and the end ring 34. The plurality of elastic telescopic members 52 are evenly arranged on the side of the clamping ring 51 away from the end ring 34. The elastic telescopic member 52 includes a fixed end 521 fixed to the clamping ring 51 and a fixed end 521 elastically inserted into the fixed end. The telescopic end 522 in 521 (specifically, one end of the telescopic end 522 inserted in the fixed end 521 can be coaxially provided with a spring or other related elastic components to achieve an elastic connection between the telescopic end 522 and the fixed end 521, which is not shown in the figure); multiple arc-shaped sealing plates 53 are surrounded in a ring, and the multiple arc-shaped sealing plates 53 are sealed and slidably inserted in the annular space between the clamping ring 51 and the end ring 34, and one end of the arc-shaped sealing plate 53 is provided with a U-shaped end 531, and one end of the arc-shaped sealing plate 53 is slidably inserted in the U-shaped end 531 of the adjacent arc-shaped sealing plate 53, such as Figure 6 and15 As shown, adjacent arc-shaped sealing plates 53 are connected end to end, the arc-shaped sealing plates 53 abut against the outer ring tube 42, and a plurality of air outlet grooves 532 are evenly arranged on the side of the arc-shaped sealing plates 53 facing the outer ring tube 42. The air outlet grooves 532 are inclined, and the inclined design of the plurality of air outlet grooves 532 will enable the formed air curtain to cover the circumference of the outer ring tube 42 as much as possible.

[0073] It should be noted that the arc-shaped sealing plate 53 and the telescopic end 522 are fixedly connected, so that the arc-shaped sealing plate 53 can be elastically displaced relative to the fixed end 521. It can be further understood that, through the radial elastic displacement of multiple arc-shaped sealing plates 53 in the annular space between the retaining ring 51 and the end ring 34, even if the kiln body 2 deflects axially, the radial elastic displacement of the arc-shaped sealing plate 53 can ensure the abutment between the arc-shaped sealing plate 53 and the outer ring tube 42. Since the outer ring tube 42 rotates with the kiln body 2, the arc-shaped sealing plate 53 remains stationary relative to the end ring 34, so the arc-shaped sealing plate 53 and the outer ring tube 42 rotate relative to each other. In this way, when the airflow flows out from the outer recessed portion 422 on the outer convex ring 421 and is ejected through multiple air outlet grooves 532, an air curtain will be formed on the outer ring tube 42.

[0074] It should also be noted that if Figure 4 and Figure 7 As shown, an airflow resistance component 35 is arranged between the outer convex ring 421 and the arc-shaped sealing plate 53, and the airflow resistance component 35 includes a plurality of blocking rings 351, a plurality of sliding rods 352 and a plurality of elastic members 353. The plurality of blocking rings 351 are of the same size, and the plurality of blocking rings 351 are arranged at intervals, and the plurality of blocking rings 351 are staggered in the radial direction, so that a circuitous airway is formed between the outer convex ring 421 and the arc-shaped sealing plate 53; the plurality of sliding rods 352 are evenly arranged in the circumferential direction, the sliding rods 352 are slidably inserted in the plurality of blocking rings 351, and one end of the sliding rod 352 is slidably inserted in the outer convex ring 421; the plurality of elastic members 353 are sleeved on the sliding rod 352, and the plurality of elastic members 353 and the plurality of blocking rings 351 are arranged at intervals.

[0075] It should be noted that the blocking ring 351 and the elastic member 353 are fixedly connected to form an elastically connected whole between the multiple elastic members 353 and the multiple blocking rings 351, and the slide rod 352 is slidably inserted into the outer convex ring 421, so that when the multiple elastic members 353 and the multiple blocking rings 351 are squeezed, the slide rod 352 will not limit the occurrence of the squeezing state due to its length. It can be further understood that the size of the detour airway changes due to the squeezing situation, and the design of the detour airway forms an airflow obstruction when the airflow passes through here, thereby enhancing the sealing performance to a certain extent. At the same time, under the condition of unchanged pressure, the airflow speed is increased, so that the airflow speed ejected from the air outlet groove 532 is increased to form a stable air curtain.

[0076] The following describes the use process of a rotary kiln for waste treatment according to an embodiment of the present application with reference to the accompanying drawings:

[0077] During the use of the rotary kiln, the kiln body 2 will experience a certain degree of jumping, axial movement, axial deflection and the like due to its rotation. At this time, the kiln body 2 will drive the entire dynamic part 4 to follow the same changes, which makes the outer ring tube 42 and the inner ring tube 43 on the dynamic part 4 undergo the above-mentioned changes in the outer tube 32 and the inner tube 33 on the static part 3, and the outer tube 32 introduces an airflow of a certain pressure through the multiple air inlet ends 321 thereon. The airflow first impacts the uniform flow ring 45 in the two outer convex rings 421. Under the uniform flow dispersion effect of the uniform flow ring 45, the airflow will be divided into two parts, one of which enters the direction of the airflow resistance component 35 from the outer recessed part 422 on one side, and is hindered by the circuitous airway formed in the airflow resistance component 35, and finally passes through the air outlet groove 5. 32 and form an air curtain, so that the connection between the static part 3 and the dynamic part 4 located on the outside forms a sealing effect, and the second airflow will enter from the outer recessed part 422 on the other side into the space between the outer ring tube 42 and the inner ring tube 43, and be blocked by the balance ring 46. The airflow here escapes from the direction of the multiple inner recessed parts 432 on the inner convex ring 431 and flows to the balance ring 47. Because the number of flow grooves 471 is less than the number of inner recessed parts 432 on one side, the airflow will generate thrust on the balance ring 47, forcing the balance ring 47 to move in the direction of the limit ring 424 until the displacement of the balance ring 47 is blocked. At this time, the balance ring 47 is located between the double rows of air outlet holes 425, so this part of the airflow is divided into two parts, one part flows directly to the leaking air outlet holes 425, and the other part flows from the balance ring 47. The air flows out from the circulation groove 471 and flows out from the air outlet 425 on the other side, and the double exhaust holes 425 are both inclined, so the air flow will be inclined to impact the inner wall of the axial retaining ring 411 after rushing out, and finally rush out from the side away from the fixed ring 41. The air flow also forms an air curtain here, and because the fixed ring 41 and the outer ring tube 42 follow the rotation of the kiln body 2, the air curtain formed on the outside of the outer ring tube 42 will wrap the outer ring tube 42 as much as possible. At this time, multiple air curtains are formed between the entire dynamic part 4 and the static part 3, which can prevent foreign matter from entering the dynamic part 4 and the static part 3 as much as possible to affect the sealing effect. The air flow between the outer ring tube 42 and the inner ring tube 43 has a certain pressure value due to the input of the air flow, and the balance ring 46 and the sealing ring 44 It is filled with compressed gas, so a pressure difference is formed on both sides. The balance ring 46 undergoes axial displacement under the action of the pressure difference in order to balance the pressure on both sides of itself. In the specific embodiment of the present application, the pressure of the incoming airflow is preferably greater than the pressure between the balance ring 46 and the sealing ring 44. In this way, when the kiln body 2 drives the dynamic part 4 to axially move on the static part 3, the balance ring 46 can normally undergo reciprocating axial displacement to form a flexible buffer for the axial movement while ensuring the pressure balance on both sides. Similarly, due to the setting of multiple hydraulic cylinders 6, the axial movement of the kiln body 2 can be limited and buffered. Specifically, the stroke range of the piston end of the hydraulic cylinder 6 can be set to limit the axial movement of the kiln body 2, and the stroke of the hydraulic cylinder 6 can be reset by setting the stroke.The axial deflection and jump of the kiln body 2 can be limited to prevent the kiln body 2 from moving, jumping or deflecting beyond the safety range. At the same time, due to the elastic displacement of multiple arc-shaped sealing plates 53 in the radial direction, the sealing performance between the outer ring cylinder 42 and the arc-shaped sealing plate 53 can be guaranteed when the kiln body 2 has axial deflection or jump.

[0078] In the related art, in the rotary kiln for waste treatment, although there is a sealed rotation relationship between the inner wall of the kiln body 2 and the inclined section of the fixed cover 31, as the kiln body 2 has more axial deflection or jumping, the wear of the inclined section of the fixed cover 31 will be aggravated, resulting in a decrease in the sealing effect here.

[0079] Embodiment 2, according to some embodiments of the present application, such as Figure 4 As shown, a cover body sealing assembly 7 is arranged between the inclined section of the fixed cover 31 and the kiln body 2. The cover body sealing assembly 7 includes a triangular seal 71 and an elastic assembly. The triangular seal 71 is coupled to the kiln body 2, and the triangular seal 71 slides sealingly on the fixed cover 31; one end of the elastic assembly is elastically inserted into the inner tube 33, and the other end of the elastic assembly is fixedly connected to the triangular seal 71.

[0080] Among them, the triangular seal 71 is arranged in an annular shape, and an annular cavity is arranged inside the triangular seal 71. The cavity of the triangular seal 71 is in a vacuum state. It can be understood that due to the high temperature inside the kiln body 2, heat will be transferred to the static part 3 and the dynamic part 4, causing the internal parts thereof to be aggravated by wear, and then resulting in a decrease in the air curtain formation effect, and further resulting in a decrease in the airtightness effect. The cavity inside the triangular seal 71 adopts a vacuum design, which can form thermal insulation to a certain extent, reducing the transfer of heat from the inside of the kiln body 2 to the static part 3 and the dynamic part 4.

[0081] Furthermore, the elastic component includes a guide rod 72 and a sealing spring 73, one end of the guide rod 72 is fixed to the triangular seal 71, and the other end of the guide rod 72 is slidably inserted into the inner tube 33; the sealing spring 73 is sleeved on the guide rod 72, one end of the sealing spring 73 abuts against the triangular seal 71, and the other end of the sealing spring 73 abuts against the inner tube 33.

[0082] Therefore, during the actual use of the rotary kiln, first, the sealing spring 73 will force the triangular seal 71 to move to the side away from the inner tube 33 through its own elastic force, that is, to fit closely to the inner wall of the kiln body 2 and the inner wall of the inclined section of the fixed cover 31, thereby enhancing the sealing between the kiln body 2 and the inclined section of the fixed cover 31. Because it has the elastic displacement ability, even if the kiln body 2 axially deflects and bounces, causing a certain wear on the inclined section of the fixed cover 31, resulting in a certain gap between it and the kiln body 2, resulting in a decrease in sealing performance, the triangular seal 71 will also form a seal at this gap through elastic displacement. Specifically, Figure 4As shown, no matter the kiln body 2 is displaced downward or upward by a certain amount, at this time, the inclined section of the fixed cover 31 will be adaptively deformed due to itself (described above: the end of the inclined section facing the kiln body 2 is made of deformable wear-resistant material, and the part of the inclined section close to the kiln body 2 is evenly arranged in the circumferential direction into a plurality of mutually superimposed laminated sheets, so that when the kiln body 2 axially deflects, the end of the inclined section facing the kiln body 2 has a certain deformation ability). The triangular seal 71 is sleeved on the inclined section of the fixed cover 31, and the inclined section of the fixed cover 31 is deformed by the triangular seal 71. The same displacement occurs due to the deformation (displacement toward the inner tube 33 and compression of the sealing spring 73). At this time, one side of the triangular seal 71 will be more closely fitted to the kiln body 2 away from the side. It can be understood that the side away from the side will form a better seal due to the deformation of the inclined section, while the side close to the side will form a better seal due to the close fit between the triangular seal 71 itself and the kiln body 2. In this way, the triangular seal 71 forms a better sealing performance between the fixed cover 31 and the kiln body 2. Of course, in actual use, During the kiln body 2, the axial deflection stroke or jumping stroke of the kiln body 2 is not as large as imagined, so the distance or approach of the triangular seal 71 relative to the kiln body 2 (i.e., the compression amount of the sealing spring 73) does not change significantly, so its sealing performance can be guaranteed. At the same time, due to the sleeve design of the triangular seal 71 on the inclined section of the fixed cover 31, the deformation of the inclined section of the fixed cover 31 can be reduced to a certain extent, and the service life of the inclined section of the fixed cover 31 can be extended. It should be noted that even if a gap appears between the inclined section of the fixed cover 31 and the kiln body 2, due to the airflow design in the above text, it can be understood that after part of the airflow passes through the circulation groove 471, a part will continue to be separated and flow out from the gap between the inclined section of the fixed cover 31 and the kiln body 2. In this way, the airflow will also form an air curtain here. Through the effect of the air curtain, the sealing performance here can be compensated to a certain extent, and at the same time, the material inside the kiln body 2 can be prevented from penetrating into the dynamic part 4 and the static part 3. For example, even if the material enters from here, it will be discharged from the air outlet 425 with the airflow under the action of the airflow.

[0083] The kiln body 2 will be squeezed and move downward along the inclined section of the fixed cover 31 and squeeze the sealing spring 73 when it moves upward.

[0084] In the related art, the rotary kiln used for waste treatment has two air curtains on the outer surface of the outer ring tube 42, and the two air curtains impact the objects respectively, so turbulence will be formed at the auxiliary sealing mechanism 5, that is, the end ring 34 and the fixed ring 41 are located outside the outer ring tube 42. The formation of turbulence will to a certain extent gather external dust and other substances at the position where the end ring 34 and the fixed ring 41 are located outside the outer ring tube 42. Once the rotary kiln stops running, the gathered substances will more or less penetrate from here to between the static part 3 and the dynamic part 4, which is easy to affect the operation of the entire sealing mechanism and its sealing performance.

[0085] Embodiment 3, according to some embodiments of the present application, such as Figure 16-Figure 18 As shown, an airflow spoiler 8 is fixedly sleeved on the outer wall of the outer ring tube 42, and the airflow spoiler 8 includes a middle retaining ring 81, and a plurality of guide strips 82 are symmetrically fixedly connected to both sides of the middle retaining ring 81, and the plurality of guide strips 82 are evenly arranged in the circumferential direction.

[0086] The middle retaining ring 81 is centrally arranged relative to the arc-shaped sealing plate 53 and the axial retaining ring 411 .

[0087] Specifically, the guide strip 82 is arranged at an angle. It should be noted that, in the specific embodiment of the present application, the inclination directions of the air outlet hole 425, the air outlet groove 532 and the guide strip 82 are consistent.

[0088] Therefore, it can be understood that when the air flows out from the air outlet groove 532 and the air outlet hole 425 (the original radial airflow will form an axial airflow under the action of the axial retaining ring 411), they will impact the middle retaining ring 81, and they will all impact the middle retaining ring 81 at an angle. In this way, after the airflows on both sides impact the middle retaining ring 81, under the action of the middle retaining ring 81 and the guide strip 82 with an inclined design thereon, the airflows on both sides will form radial and inclined airflows flowing in the direction away from the outer ring tube 42. During use, due to the rotation of the kiln body 2, the middle retaining ring 81 will be driven to rotate synchronously, so the airflows on both sides will be radial, inclined and rotate as a whole. In this way, a regular airflow or air curtain will be formed to avoid the end ring 34 and the fixing ring 41 being located outside the outer ring tube 42 to form a convergence area. In this way, the sealing performance of the entire sealing mechanism can be further improved, and the service life of the sealing mechanism can be improved to a certain extent.

[0089] It should be noted that the specific models and specifications of the elastic member 353, the return spring 473, the hydraulic cylinder 6 and the sealing spring 73 need to be selected and determined according to the actual specifications of the device, etc. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail.

[0090] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A rotary kiln for waste treatment, comprising a base (1), a kiln body (2) rotatably supported on the base (1), a kiln head end (21) and a kiln tail end (22) respectively connected at two ends of the kiln body (2), the kiln head end (21) and the kiln tail end (22) respectively being fixedly connected to the base (1), characterized in that: The two ends of the kiln body (2) are respectively coaxially connected to the kiln head end (21) and the kiln tail end (22) with sealing mechanisms, the end of the sealing mechanism away from the kiln body (2) is a static part (3), and the end of the sealing mechanism facing the kiln body (2) is a dynamic part (4), and the dynamic part (4) is coaxially sealed and rotatably plugged into the static part (3); The inner side of the static part (3) is connected to the kiln body (2) in a sealed and rotatable manner; The static part (3) is externally connected to an air supply device, and the gas from the air supply device to the static part (3) is discharged from the static part (3) sleeved on the outside of the dynamic part (4) and the outer wall of the dynamic part (4) to form an air curtain at the discharge point; Two pressure regulating components are coaxially arranged inside the dynamic part (4), one of the pressure regulating components is used to regulate the pressure inside the dynamic part (4), and the other pressure regulating component is used to regulate the amount of gas discharged from the outer wall of the dynamic part (4); An auxiliary sealing mechanism (5) is arranged on the outer side of one end of the static part (3) facing the dynamic part (4), the auxiliary sealing mechanism (5) elastically expands and contracts along the radial direction of the kiln body (2), and the auxiliary sealing mechanism (5) is used to enhance the sealing performance between the static part (3) and the dynamic part (4) when the kiln body (2) deflects in the axial direction; A plurality of hydraulic cylinders (6) are evenly arranged in the circumferential direction between the static part (3) and the dynamic part (4); the hydraulic cylinders (6) are fixedly connected to the auxiliary sealing mechanism (5); a spherical member (61) is fixedly connected to the piston end of the hydraulic cylinder (6); the spherical member (61) is slidably embedded in the dynamic part (4); and the hydraulic cylinders (6) are used to limit the axial movement of the kiln body (2); The static part (3) comprises a fixed cover (31), an outer cylinder (32) and an inner cylinder (33); The dynamic part (4) comprises: A fixed ring (41), the fixed ring (41) is coaxially fixed to the end surface of the kiln body (2), the fixed ring (41) is coaxially provided with an arc groove, and the arc groove is matched with the spherical member (61); an outer ring tube (42), the outer ring tube (42) is coaxially fixed to the fixed ring (41), the cross section of the outer ring tube (42) is F-shaped, the protrusion on the outer ring tube (42) is rotatably matched with the inner wall of the outer tube (32), and a plurality of outer recessed portions (422) are staggeredly provided on the outer wall of the protrusion of the outer ring tube (42) The outer ring tube (42) is provided with a plurality of air outlet holes (425) uniformly arranged in the circumferential direction on a side away from the protrusion, and the plurality of air outlet holes (425) are arranged in double rows along the axial direction of the outer ring tube (42); an axial retaining ring (411) is coaxially fixedly connected to a side of the fixing ring (41) away from the kiln body (2), and the axial retaining ring (411) covers the two rows of air outlet holes (425); an inner ring tube (43), the inner ring tube (43) being coaxially arranged on the inner side of the outer ring tube (42), and the cross section of the inner ring tube (43) being F-shaped, The protrusion on the inner ring tube (43) is rotatably matched with the inner tube (33), and a plurality of inner recessed portions (432) are staggeredly arranged on the outer wall of the protrusion of the inner ring tube (43); a sealing ring (44), the sealing ring (44) is coaxially fixed to the outer ring tube (42) and the inner ring tube (43); a uniform flow ring (45), the uniform flow ring (45) is embedded in the protrusion on the outer side of the outer ring tube (42), the cross section of the uniform flow ring (45) is symmetrical in the shape of a mountain, the center of the outer wall of the uniform flow ring (45) is outwardly protruding, and the uniform flow ring The two sides of the outer wall (45) are arranged in an inwardly concave arc shape; a balance ring (46), the balance ring (46) is coaxially sealed and limitedly slidably connected between the outer ring tube (42) and the inner ring tube (43), and compressed gas is filled between the balance ring (46) and the sealing ring (44); a balance ring (47), the balance ring (47) is coaxially elastically slidable between the outer ring tube (42) and the inner tube (33), and a plurality of flow grooves (471) are evenly arranged in the circumferential direction on one side of the balance ring (47) facing the inner tube (33).

2. A rotary kiln for waste treatment as claimed in claim 1, characterized in that: The fixed cover (31) is arranged in an annular shape as a whole. The cross section of the fixed cover (31) along the axial direction of the rotary kiln is divided into three sections: vertical, transverse and inclined. The vertical section is fixedly connected to the kiln head end (21) or the kiln tail end (22). The transverse section is fixedly connected to the vertical section and one end of the inclined section close to the axis. The side of the inclined section away from the transverse section is rotatably sealed and connected to the kiln body (2). The outer cylinder (32) is coaxially fixed to the vertical section of the fixed cover (31), and the outer cylinder (32) is located between the outer diameter and the inner diameter of the fixed cover (31); The inner cylinder (33) is coaxially fixed to the vertical section of the fixed cover (31), the inner cylinder (33) is located on the inner side of the outer cylinder (32), and the cross section of the inner cylinder (33) is L-shaped; The static part (3) further comprises an end ring (34), the end ring (34) being coaxially fixed to an end of the outer cylinder (32) away from the vertical section of the fixed cover (31), and the inner diameter of the end ring (34) is consistent with the inner diameter of the outer cylinder (32).

3. A rotary kiln for waste treatment as claimed in claim 2, characterized in that: A plurality of air inlet ends (321) are evenly connected to each other in the circumferential direction on the side wall of the outer cylinder (32), and the plurality of air inlet ends (321) are externally connected to the same air supply device; A plurality of end surface sliding grooves 1 (341) are evenly arranged in the circumferential direction on one side of the end ring (34) away from the outer cylinder (32), and the plurality of end surface sliding grooves 1 (341) are arranged along the radial direction of the end ring (34).

4. A rotary kiln for waste treatment as claimed in claim 3, characterized in that: The protrusions on the outer ring tube (42) are two coaxially arranged outer convex rings (421), the uniform flow ring (45) is embedded between the two outer convex rings (421), the outer recessed portions (422) are circumferentially and evenly arranged on the outer walls of the two outer convex rings (421), the outer recessed portions (422) on the two outer convex rings (421) are staggered with each other, an upper spacer ring (423) is coaxially fixed on the inner wall of the outer ring tube (42) for limiting the axial displacement of the balance ring (46), and a limiting ring (424) is coaxially fixed between the two rows of the air outlet holes (425) of the outer ring tube (42), and the limiting ring (424) is used to limit the axial displacement of the balance ring (47).

5. A rotary kiln for waste treatment as claimed in claim 4, characterized in that: The protrusions on the inner ring tube (43) are two coaxially arranged inner convex rings (431), the inner recessed portions (432) are circumferentially and evenly arranged on the outer walls of the two inner convex rings (431), the inner recessed portions (432) on the two inner convex rings (431) are staggered with each other, and a lower spacer ring (433) is coaxially fixedly connected to the inner wall of the inner ring tube (43), and the lower spacer ring (433) corresponds to the upper spacer ring (423).

6. A rotary kiln for waste treatment as claimed in claim 1, characterized in that: The portion protruding outwards in the middle of the outer wall of the uniform flow ring (45) is a raised end (451), and a plurality of inclined grooves (452) are circumferentially arranged on the raised end (451). The inclined grooves (452) are symmetrically arranged, and the inclined grooves (452) are arranged in a herringbone shape on the raised end (451).

7. A rotary kiln for waste treatment as claimed in claim 1, characterized in that: A plurality of guide rods (472) are uniformly slidably inserted in the circumferential direction on the side wall of the balancing ring (47), and the two ends of the guide rods (472) are respectively fixed to the fixing ring (41) and the sealing ring (44). A return spring (473) is sleeved on the guide rods (472), and the two ends of the return spring (473) are respectively abutted against the fixing ring (41) and the balancing ring (47).

8. A rotary kiln for waste treatment as claimed in claim 4, characterized in that: The auxiliary sealing mechanism (5) comprises: A snap ring (51), the snap ring (51) being coaxially fixed to the end ring (34), a plurality of second end surface slide grooves (511) matching the first end surface slide groove (341) being uniformly arranged in the circumferential direction on one side of the snap ring (51) facing the end ring (34), and an annular space being left between the snap ring (51) and the end ring (34); a plurality of elastic telescopic members (52), the plurality of elastic telescopic members (52) being evenly arranged in the circumferential direction on a side of the clamping ring (51) away from the end ring (34), the elastic telescopic member (52) comprising a fixed end (521) fixedly connected to the clamping ring (51), and a telescopic end (522) elastically inserted into the fixed end (521); A plurality of arc-shaped sealing plates (53), the plurality of arc-shaped sealing plates (53) are arranged in a ring shape, the plurality of arc-shaped sealing plates (53) are sealingly and slidably inserted in the annular space between the retaining ring (51) and the end ring (34), one end of the arc-shaped sealing plate (53) is provided with a U-shaped end (531), one end of the arc-shaped sealing plate (53) is slidably inserted in the U-shaped end (531) of the adjacent arc-shaped sealing plate (53), the arc-shaped sealing plate (53) is in contact with the outer ring tube (42), and a plurality of air outlet grooves (532) are evenly arranged on one side of the arc-shaped sealing plate (53) facing the outer ring tube (42), and the air outlet grooves (532) are inclinedly arranged.

9. A rotary kiln for waste treatment as claimed in claim 8, characterized in that: An airflow resistance component (35) is provided between the outer convex ring (421) and the arc-shaped sealing plate (53), and the airflow resistance component (35) comprises: A plurality of blocking rings (351), the plurality of blocking rings (351) are of the same size, the plurality of blocking rings (351) are arranged at intervals, and the plurality of blocking rings (351) are arranged staggered in the radial direction, and the plurality of blocking rings (351) form a circuitous air passage between the outer convex ring (421) and the arc-shaped sealing plate (53); A plurality of sliding rods (352), the plurality of sliding rods (352) being evenly arranged in the circumferential direction, the sliding rods (352) being slidably inserted into the plurality of blocking rings (351), and one end of the sliding rod (352) being slidably inserted into the outer convex ring (421); A plurality of elastic members (353), the plurality of elastic members (353) being sleeved on the sliding rod (352), and the plurality of elastic members (353) and the plurality of blocking rings (351) being arranged at intervals.

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