Rotary kiln with self-cleaning capability

Abstract

The invention discloses a rotary kiln with self-cleaning capability, and relates to the technical field of rotary kilns, through cooperative arrangement of a kiln body, a transposition structure, a first telescopic cylinder, a first plugging plate, a second telescopic cylinder, a second plugging plate, a mounting frame, a fire spraying structure and a water spraying structure, the rotary kiln has the self-cleaning capability, and the cleaning effect on rings formed on the inner wall of the kiln body is greatly improved; during cleaning, the fire spraying structure and the water spraying structure are located in the kiln body, the fire spraying structure firstly operates and enables the temperature of the formed ring on the inner wall of the kiln body to rapidly rise, the water spraying structure then operates to spray high-pressure water jet to the formed ring on the inner wall of the kiln body, the formed ring on the inner wall of the kiln body is impacted, the temperature rapidly drops, and the formed ring is rapidly cooled, so that the surface of the formed ring of the kiln body cracks. Meanwhile, the surface pressure of the formed ring of the kiln body is also increased, so that the deterioration degree of the formed ring of the kiln body is intensified, the formed ring of the kiln body falls under the high-pressure impact force of the water body, meanwhile, the high-pressure water is suddenly vaporized under the high-temperature state to generate strong explosion, and the formed ring on the inner wall of the kiln body is impacted, crushed and collapsed.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary kilns, and in particular to a rotary kiln with self-cleaning capability. Background Art

[0002] Rotary kiln generally refers to rotary bed kiln, which is a rotary calcining kiln (commonly known as rotary kiln). Its appearance is similar to that of a rotary bed, so it is also called a rotary bed kiln. It belongs to the category of building materials equipment. Among them, metallurgical and chemical rotary kilns are mainly used for magnetization roasting of lean iron ore in steel plants in the metallurgical industry, such as oxidation roasting of chromium and nickel iron ore. Rotary kilns generally have the problem of kiln body ringing, which affects the continuous production of rotary kilns.

[0003] In the early stage of ring formation in the kiln, the impact on the production of the rotary kiln is small, but as the thickness of the ring material increases, the ring material will reduce the cross-sectional area of ​​the rotary kiln, and the degree of obstruction of the flow of smoke and materials in the kiln will increase. The temperature from the feeding end to the ring part in the kiln will decrease due to the decrease in the degree of radiation heat transfer, which will affect the roasting effect of the iron ore. In order to increase the temperature of the kiln tail in production operation, the heat supply in the kiln has to be increased, which will inevitably lead to the waste of energy of the rotary kiln. At the same time, after the ring material on the kiln wall is formed, the residence time of the material in the kiln is prolonged and it is difficult to discharge. The increase in the iron ore filling rate will increase the load of the rotary kiln and reduce the production capacity. When the thickness of the ring material in the rotary kiln is thick, the thermal condition in the kiln deteriorates, and the output and quality of the rotary kiln decrease. However, in order to maintain the normal production of the rotary kiln, the ring material must be processed. Most of the existing cleaning methods are to enter the kiln manually for cleaning. This method is not only unsafe, but also time-consuming and labor-intensive. Summary of the invention

[0004] The purpose of the present invention is to solve the problems raised in the above background technology, and then proposes a self-cleaning structure of a rotary kiln.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] A rotary kiln with self-cleaning capability, comprising a kiln body, a transposition structure, a first telescopic cylinder, a first blocking plate, a second telescopic cylinder, a second blocking plate, a mounting frame, a flame spraying structure and a water spraying structure;

[0007] The kiln body is provided with strip openings along its length;

[0008] The kiln body is provided with a transposition structure, on which two groups of first telescopic cylinders are arranged, and the telescopic ends of the two groups of first telescopic cylinders are commonly connected with a first blocking plate that matches the strip-shaped opening structure, and the first telescopic cylinders are operated to make the first blocking plate approach or move away from the strip-shaped opening;

[0009] Two sets of second telescopic cylinders are also provided on the transposition structure. The telescopic ends of the two sets of first telescopic cylinders are commonly connected with a second blocking plate. The second blocking plate is consistent with the strip-shaped opening structure and is arranged opposite to the first blocking plate. The second telescopic cylinder operates to make the second blocking plate connect to or move away from the strip-shaped opening.

[0010] The second blocking plate is provided with a fire spraying structure and a water spraying structure via a mounting frame;

[0011] The transposition structure operates to swap the position of the first sealing plate or the second sealing plate, so that the first sealing plate or the second sealing plate is directly above the strip opening, and when the second sealing plate is connected to the strip opening, the flame-spraying structure and the water-spraying structure are in the kiln body, and the flame-spraying structure operates first and causes the temperature of the inner wall of the kiln body to rise rapidly, and the water-spraying structure operates later to spray high-pressure water jets onto the inner wall ring of the kiln body, so that the inner wall ring of the kiln body is impacted and the temperature drops rapidly.

[0012] Furthermore, the transposition structure includes a stand, a rotating roller, a transposition motor and a turntable;

[0013] There are two groups of vertical frames which are symmetrically arranged on the kiln body about the strip-shaped opening. Each of the two groups of vertical frames is connected to a turntable via a rotating roller, and one of the rotating rollers is connected to a transposition motor so that the transposition motor drives the rotating roller to rotate. A group of first telescopic cylinders and a group of second telescopic cylinders are respectively installed on the two turntables.

[0014] Furthermore, the flame spraying structure includes an annular fire pipe, a flame spray head, a fuel branch pipe, a fuel main pipe and a fuel inlet pipe;

[0015] There are several groups of annular fire tubes which are linearly arranged on the mounting frame, and several flame nozzles are arranged on the circumference of the annular fire tubes so that the flames can be ejected in multiple directions. A fuel branch pipe is also arranged on the annular fire tube, and the several fuel branch pipes all pass through the second blocking plate and are commonly connected to a fuel main pipe, and the fuel main pipe is connected to a fuel inlet pipe.

[0016] Furthermore, the water spray structure includes an annular water pipe, a water body nozzle, a water body branch pipe, a water body main pipe, a water guide pipe, a booster pump and a water inlet pipe;

[0017] There are several groups of annular water pipes which are linearly arranged on the mounting frame, and several water nozzles are arranged on the circumference of the annular water pipes so that water can be sprayed in multiple directions. A water branch pipe is also arranged on the annular water pipe. Several water branch pipes all pass through the second blocking plate and are commonly connected to a water main pipe. The water main pipe is connected to a water guide pipe, and the water guide pipe is connected to a water inlet pipe through a booster pump.

[0018] Furthermore, the water spraying structure adopts intermittent operation, and the interval time is 0.5-1s to improve the impact effect of the water spraying structure on the ring formation on the inner wall of the kiln body.

[0019] Furthermore, the annular fire pipe and the annular water pipe are arranged alternately to improve the rapid heating and cooling effects of the fire spray structure and the water spray structure on the inner wall of the kiln body.

[0020] Furthermore, the strip-shaped opening is in a stepped structure, the upper portion of the strip-shaped opening of the stepped structure plays a containing role, and the lower portion plays a supporting role, so that when it contacts the first sealing plate or the second sealing plate, it has a better sealing effect.

[0021] Furthermore, it also includes a knocking structure to improve the cleaning effect of the ring on the inner wall of the kiln body. The knocking structure is arranged on the first sealing plate, and when the second sealing plate is connected to the strip opening, the knocking structure knocks the external kiln body.

[0022] Furthermore, the knocking structure includes a guide rail, a self-moving block, a support plate, a third telescopic cylinder, an impact cylinder, a mounting seat and a knocking ball;

[0023] The guide rail is horizontally arranged on the second sealing plate and a self-moving block is arranged on it, two support plates are symmetrically arranged on the self-moving block, a third telescopic cylinder is vertically arranged on the support plate, an impact cylinder is installed at the telescopic end of the third telescopic cylinder, the impact cylinder is horizontally arranged and a knocking ball is installed at the impact end through a mounting seat, so that the two knocking balls can perform knocking actions from the sides of the kiln body respectively.

[0024] Furthermore, the knocking structure also includes a threaded rod, one end of which is fixedly arranged on the knocking ball, and the other end of the threaded rod is threadedly connected to the mounting seat to facilitate the replacement operation of the knocking ball.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention has self-cleaning ability through the coordinated arrangement of the kiln body, the transposition structure, the first telescopic cylinder, the first blocking plate, the second telescopic cylinder, the second blocking plate, the mounting frame, the flame spraying structure and the water spraying structure, which greatly improves the cleaning effect of the ring on the inner wall of the kiln body;

[0027] When the kiln body is operating normally, the first telescopic cylinder operates to make the first blocking plate close the side of the kiln body, which does not affect the normal magnetization roasting of iron ore in the kiln body; when cleaning is required, the transposition structure swaps the position of the first blocking plate and the second blocking plate, and then the second telescopic cylinder operates to make the second blocking plate close the side of the kiln body. In this state, the flame spraying structure and the water spraying structure are in the kiln body, and the flame spraying structure operates first to rapidly increase the ring temperature of the inner wall of the kiln body to 800-1000℃, and the water spraying structure operates later to spray high-pressure water. The water jets to the rings on the inner wall of the kiln body, which are impacted and the temperature drops rapidly. The rapid cooling causes cracks on the surface of the rings. At the same time, the surface pressure of the rings will increase, thereby aggravating the deterioration of the rings. The rings on the kiln body fall off due to the high-pressure impact of the water body. At the same time, the high-pressure water suddenly vaporizes under high temperature and produces a strong explosion, which smashes and collapses the rings on the inner wall of the kiln body, and finally completes the cleaning work. The device is ingeniously conceived and has a good cleaning effect on the rings on the inner wall of the kiln body.

[0028] 2. The present invention sets a knocking structure, which can perform high-frequency knocking on the side of the kiln body at multiple points. The rings on the inner wall of the kiln body fall off due to high-frequency vibration. The knocking structure cooperates with the flame-spraying structure and the water-spraying structure, which greatly improves the cleaning ability of the rings on the inner wall of the kiln body and has good performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of a first working state of the present invention;

[0030] Figure 2 It is a schematic diagram of a second working state of the present invention;

[0031] Figure 3 It is a schematic diagram of the third working state of the present invention;

[0032] Figure 4 It is a schematic diagram of a fourth working state of the present invention;

[0033] Figure 5 for Figure 1 A partial enlarged view of middle A;

[0034] Figure 6 for Figure 1 A partial enlarged view of B in the middle;

[0035] Figure 7 It is a schematic diagram of the installation position of the knocking structure;

[0036] Figure 8 is a structural diagram of the knocking structure;

[0037] Among them: 1. kiln body; 11. strip mouth; 2. transposition structure; 21. stand; 22. rotating roller; 23. transposition motor; 24. turntable; 3. first telescopic cylinder; 4. first blocking plate; 5. second telescopic cylinder; 6. second blocking plate; 7. mounting frame; 8. flame spraying structure; 81. annular fire tube; 82. flame nozzle; 83. fuel branch pipe; 84. fuel main pipe; 85. fuel inlet pipe; 9. water spraying structure; 91. annular water pipe; 92. water nozzle; 93. water branch pipe; 94. water main pipe; 95. water guide pipe; 96. booster pump; 97. water inlet pipe; 10. knocking structure; 101. guide rail; 102. self-moving block; 103. support plate; 104. third telescopic cylinder; 105. impact cylinder; 106. mounting seat; 107. knocking ball; 108. threaded rod. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention is further described in combination with the drawings and embodiments:

[0039] Embodiment 1:

[0040] Refer to the attached Figure 1 -Attached Figure 6 As shown, a rotary kiln with self-cleaning capability comprises a kiln body 1, a transposition structure 2, a first telescopic cylinder 3, a first blocking plate 4, a second telescopic cylinder 5, a second blocking plate 6, a mounting frame 7, a flame spraying structure 8 and a water spraying structure 9;

[0041] The kiln body 1 is provided with a strip opening 11 in a stepped structure along its length direction. The upper part of the strip opening 11 in the stepped structure plays a role of accommodation, and the lower part plays a role of support, so that when it contacts with the first sealing plate 4 or the second sealing plate 6, it has a better sealing effect.

[0042] The kiln body 1 is provided with a transposition structure 2, on which two groups of first telescopic cylinders 3 are provided, and the telescopic ends of the two groups of first telescopic cylinders 3 are commonly connected with a first blocking plate 4 that matches the structure of the strip opening 11. When the first telescopic cylinders 3 are operated, the first blocking plate 4 is connected to or away from the strip opening 11;

[0043] Two sets of second telescopic cylinders 5 are also provided on the transposition structure 2. The telescopic ends of the two sets of first telescopic cylinders 3 are commonly connected with a second blocking plate 6. The second blocking plate 6 is consistent with the structure of the strip opening 11 and is arranged opposite to the first blocking plate 4. The second telescopic cylinder 5 operates to make the second blocking plate 6 connect to or move away from the strip opening 11.

[0044] A fire spraying structure 8 and a water spraying structure 9 are mounted on the second blocking plate 6 via a mounting frame 7;

[0045] The transposition structure 2 operates to swap the position of the first blocking plate 4 or the second blocking plate 6, so that the first blocking plate 4 or the second blocking plate 6 is located directly above the strip opening 11, and when the second blocking plate 6 is connected to the strip opening 11, the flame spraying structure 8 and the water spraying structure 9 are located in the kiln body 1, and the flame spraying structure 8 operates first to rapidly increase the temperature of the inner wall of the kiln body 1, and the water spraying structure 9 operates later to spray a high-pressure water jet onto the inner wall of the kiln body 1, so that the inner wall of the kiln body 1 is impacted and the temperature drops rapidly.

[0046] In the specific implementation process of this embodiment, there are two work processes:

[0047] First, when the kiln body 1 is operating normally, the first telescopic cylinder 3 is in an extended state and the first blocking plate 4 is connected to the strip-shaped opening 11. At this time, the side of the kiln body 1 is in a closed state, and the kiln body 1 is normally magnetizing and roasting the iron ore. The second telescopic cylinder 5, the second blocking plate 6, the mounting frame 7, the flame spraying structure 8 and the water spraying structure 9 are not working;

[0048] Secondly, when the kiln body 1 needs to be cleaned, the first telescopic cylinder 3 is in a retracted state and moves the first sealing plate 4 away from the strip opening 11. At this time, the transposition structure 2 operates to swap the positions of the first sealing plate 4 and the second sealing plate 6, so that the second sealing plate 6 is directly above the strip opening 11. Subsequently, the second telescopic cylinder 5 operates to connect the second sealing plate 6 to the strip opening 11. In this state, the flame-spraying structure 8 and the water-spraying structure 9 are in the kiln body 1, and the flame-spraying structure 8 operates first and causes the temperature of the inner wall of the kiln body 1 to rise rapidly to 800-1000°C. The water-spraying structure 9 operates later to spray a high-pressure water jet onto the inner wall of the kiln body 1, causing the inner wall of the kiln body 1 to be impacted and the temperature to drop rapidly until the ring falls off.

[0049] It is worth noting that when the kiln body 1 is restored to a normal operating state, the rings on the inner wall of the kiln body 1 after cleaning will be discharged to the outside of the kiln body 1 as the kiln body 1 rotates.

[0050] For the above scheme, the structure of the transposition structure 2 is specifically:

[0051] See attached Figure 1 and Figure 5 As shown, the transposition structure 2 includes a stand 21, a rotating roller 22, a transposition motor 23 and a turntable 24; there are two groups of stand 21 and they are symmetrically arranged on the kiln body 1 about the strip-shaped opening 11, and each of the two groups of stand 21 is connected to a turntable 24 through a rotating roller 22, and one of the rotating rollers 22 is connected to the transposition motor 23 so that the transposition motor 23 operates to drive the rotating roller 22 to rotate, wherein a group of first telescopic cylinders 3 and a group of second telescopic cylinders 5 are respectively installed on the two turntables 24.

[0052] In the above scheme, the structure of the flame-spraying structure 8 is specifically as follows:

[0053] See attached Figure 1 and attached Figure 6 As shown, the flame spraying structure 8 includes an annular fire tube 81, a flame spray head 82, a fuel branch pipe 83, a fuel main pipe 84 and a fuel inlet pipe 85; the annular fire tube 81 has several groups and is linearly arranged on the mounting frame 7, and a plurality of flame spray heads 82 are arranged on the circumference of the annular fire tube 81 so that the flame is sprayed in multiple directions, and a fuel branch pipe 83 is also arranged on the annular fire tube 81, and the plurality of fuel branch pipes 83 all pass through the second blocking plate 6 and are commonly connected to a fuel main pipe 84, and the fuel main pipe 84 is connected to a fuel inlet pipe 85;

[0054] During the implementation of the scheme, the external fuel enters the fuel main pipe 84 through the fuel inlet pipe 85, then enters a plurality of fuel branch pipes 83 through the fuel main pipe 84, then enters the annular fire pipe 81, and finally sprays out flames through the flame nozzle 82. The generated high-temperature flames are sprayed out from multiple directions and continuously contact the inner wall ring of the kiln body 1. The high-temperature flames are fully in contact with the inner wall ring of the kiln body 1 and cause the temperature of the inner wall ring of the kiln body 1 to rise rapidly.

[0055] In the above scheme, the structure of the flame-spraying structure 8 is specifically as follows:

[0056] See attached Figure 1 and attached Figure 6 As shown, the water spray structure 9 includes an annular water pipe 91, a water nozzle 92, a water branch pipe 93, a water main pipe 94, a water guide pipe 95, a booster pump 96 and a water inlet pipe 97; the annular water pipe 91 has several groups and is linearly arranged on the mounting frame 7, and a plurality of water nozzles 92 are arranged on the circumference of the annular water pipe 91 so that water can be sprayed in multiple directions, and a water branch pipe 93 is also arranged on the annular water pipe 91, and the plurality of water branch pipes 93 all pass through the second blocking plate 6 and are commonly connected to a water main pipe 94, the water main pipe 94 is connected to a water guide pipe 95, and the water guide pipe 95 is connected to a water inlet pipe 97 through a booster pump 96;

[0057] During the implementation of the scheme, external cold water enters the booster pump 96 through the water inlet pipe 97, is pressurized by the booster pump 96 and pumped into the water main pipe 94, then enters a number of water branch pipes 93 through the water main pipe 94, and then enters the annular water pipe 91, and finally sprays out high-pressure water through the water nozzle 92. The generated high-pressure water is sprayed out from multiple directions and continuously contacts with the high-temperature inner wall ring of the kiln body 1. The inner wall ring of the kiln body 1 is impacted and the temperature drops rapidly. The rapid cooling causes cracks on the surface of the kiln body 1 ring. At the same time, the surface pressure of the kiln body 1 ring will also increase, thereby aggravating the degree of deterioration of the kiln body 1 ring. The kiln body 1 ring falls due to the high-pressure impact force of the water body. At the same time, the high-pressure water suddenly vaporizes under high temperature and produces a strong explosion, which impacts and crushes the inner wall ring of the kiln body 1 and collapses it, and finally completes the cleaning work.

[0058] In addition, considering the impact effect of the water spray structure 9 on the ring formation on the inner wall of the kiln body 1, the water spray structure 9 adopts intermittent operation with an interval time of 0.5-1s.

[0059] In addition, considering the rapid heating and cooling effects of the flame spraying structure 8 and the water spraying structure 9 on the inner wall of the kiln body 1, the annular fire pipe 81 and the annular water pipe 91 are arranged alternately.

[0060] Embodiment 2:

[0061] In order to further make the rings on the inner wall of the kiln body 1 fall off completely and reduce the adhesion of the rings on the inner wall of the kiln body 1, refer to the attached Figure 7 and attached Figure 8 As shown, a self-cleaning structure of a rotary kiln also includes a knocking structure 10, which is arranged on the first blocking plate 4, and when the second blocking plate 6 is connected to the strip opening 11, the knocking structure 10 knocks the external kiln body 1.

[0062] Specifically, the structure of the striking structure 10 is as follows:

[0063] The knocking structure 10 includes a guide rail 101, a self-moving block 102, a support plate 103, a third telescopic cylinder 104, an impact cylinder 105, a mounting seat 106 and a knocking ball 107; the guide rail 101 is horizontally arranged on the second blocking plate 6 and is provided with the self-moving block 102, two support plates 103 are symmetrically arranged on the self-moving block 102, the support plate 103 is vertically provided with the third telescopic cylinder 104, the telescopic end of the third telescopic cylinder 104 is provided with the impact cylinder 105, the impact cylinder 105 is horizontally arranged and the impact end is provided with a knocking ball 107 through the mounting seat 106, so that the two knocking balls 107 can perform knocking actions from the side of the kiln body 1 respectively;

[0064] In addition, considering the replacement operation of the knocking ball 107, the knocking structure 10 further includes a threaded rod 108, one end of the threaded rod 108 is fixedly arranged on the knocking ball 107, and the other end of the threaded rod 108 is threadedly connected to the mounting seat 106;

[0065] During the implementation of the scheme, when the first sealing plate 4 is connected to the strip opening 11, the third telescopic cylinder 104 is in a retracted state and the knocking ball 107 is located above the side kiln body 1. When the first sealing plate 4 and the second sealing plate 6 are replaced, the knocking ball 107 is not in contact with the kiln body 1. When the second sealing plate 6 is connected to the strip opening 11, the third telescopic cylinder 104 is in an extended state and the knocking ball 107 is located on the side of the kiln body 1. At this time, the self-moving block 102 makes reciprocating linear motion along the guide rail 101, so that the knocking ball 107 moves to various positions on the side of the kiln body 1. At the same time, the impact cylinder 105 operates to drive the knocking ball 107 to knock on the side of the kiln body 1 at high frequency. At this time, the ring on the inner wall of the kiln body 1 falls off due to the high-frequency vibration.

[0066] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A rotary kiln with self-cleaning capability, characterized in that: It comprises a kiln body (1), a transposition structure (2), a first telescopic cylinder (3), a first blocking plate (4), a second telescopic cylinder (5), a second blocking plate (6), a mounting frame (7), a flame spraying structure (8) and a water spraying structure (9); The kiln body (1) is provided with a strip-shaped opening (11) along its length direction; A kiln body (1) is provided with a transposition structure (2), and two groups of first telescopic cylinders (3) are provided on the transposition structure (2). The telescopic ends of the two groups of first telescopic cylinders (3) are commonly connected to a first blocking plate (4) that matches the structure of the strip opening (11). When the first telescopic cylinders (3) are operated, the first blocking plate (4) is connected to or away from the strip opening (11). Two groups of second telescopic cylinders (5) are also arranged on the transposition structure (2); the telescopic ends of the two groups of first telescopic cylinders (3) are commonly connected to a second blocking plate (6); the second blocking plate (6) is structurally consistent with the strip opening (11) and is arranged opposite to the first blocking plate (4); the second telescopic cylinder (5) operates to move the second blocking plate (6) into or away from the strip opening (11); A flame spraying structure (8) and a water spraying structure (9) are mounted on the second blocking plate (6) via a mounting frame (7); The transposition structure (2) operates to swap the position of the first blocking plate (4) or the second blocking plate (6), so that the first blocking plate (4) or the second blocking plate (6) is located directly above the strip opening (11), and when the second blocking plate (6) is connected to the strip opening (11), the flame spraying structure (8) and the water spraying structure (9) are located in the kiln body (1), and the flame spraying structure (8) operates first to rapidly increase the temperature of the inner wall of the kiln body (1), and the water spraying structure (9) operates later to spray a high-pressure water jet onto the inner wall of the kiln body (1), so that the inner wall of the kiln body (1) is impacted and the temperature drops rapidly.

2. A rotary kiln with self-cleaning capability according to claim 1, characterized in that: The transposition structure (2) comprises a stand (21), a rotating roller (22), a transposition motor (23) and a rotating disk (24); There are two groups of vertical frames (21) which are symmetrically arranged on the kiln body (1) about the strip-shaped opening (11). Each of the two groups of vertical frames (21) is connected to a turntable (24) via a rotating roller (22), and one of the rotating rollers (22) is connected to a transposition motor (23). A group of first telescopic cylinders (3) and a group of second telescopic cylinders (5) are respectively installed on the two turntables (24).

3. A rotary kiln with self-cleaning capability according to claim 2, characterized in that: The flame spraying structure (8) comprises an annular flame pipe (81), a flame spray head (82), a fuel branch pipe (83), a fuel main pipe (84) and a fuel inlet pipe (85); The annular fire tube (81) has a plurality of groups and is linearly arranged on a mounting frame (7), and a plurality of flame nozzles (82) are circumferentially arranged on the annular fire tube (81). The annular fire tube (81) is also provided with a fuel branch pipe (83), and the plurality of fuel branch pipes (83) all pass through the second blocking plate (6) and are commonly connected to a fuel main pipe (84), and the fuel main pipe (84) is connected to a fuel inlet pipe (85).

4. A rotary kiln with self-cleaning capability according to claim 3, characterized in that: The water spray structure (9) comprises an annular water pipe (91), a water body spray head (92), a water body branch pipe (93), a water body main pipe (94), a water guide pipe (95), a booster pump (96) and a water inlet pipe (97); The annular water pipe (91) has a plurality of groups and is linearly arranged on the mounting frame (7). The annular water pipe (91) is circumferentially provided with a plurality of water nozzles (92). The annular water pipe (91) is also provided with a water branch pipe (93). The plurality of water branch pipes (93) all pass through the second blocking plate (6) and are commonly connected to a water main pipe (94). The water main pipe (94) is connected to a water guide pipe (95). The water guide pipe (95) is connected to a water inlet pipe (97) via a booster pump (96).

5. A rotary kiln with self-cleaning capability according to claim 4, characterized in that: The water spraying structure (9) adopts intermittent operation, and the interval time is 0.5-1s.

6. A rotary kiln with self-cleaning capability according to claim 4, characterized in that: The annular fire pipe (81) and the annular water pipe (91) are arranged alternately.

7. The rotary kiln with self-cleaning capability according to claim 1, characterized in that: The strip-shaped opening (11) is in a stepped structure, the upper part of the strip-shaped opening (11) having the stepped structure plays a containing role, and the lower part plays a supporting role.

8. The rotary kiln with self-cleaning capability according to claim 1, characterized in that: It also includes a knocking structure (10), which is arranged on the first blocking plate (4), and when the second blocking plate (6) is connected to the strip-shaped opening (11), the knocking structure (10) knocks the external kiln body (1).

9. A rotary kiln with self-cleaning capability according to claim 8, characterized in that: The knocking structure (10) comprises a guide rail (101), a self-moving block (102), a support plate (103), a third telescopic cylinder (104), an impact cylinder (105), a mounting seat (106) and a knocking ball (107); The guide rail (101) is horizontally arranged on the second blocking plate (6) and a self-moving block (102) is arranged thereon, two support plates (103) are symmetrically arranged on the self-moving block (102), a third telescopic cylinder (104) is vertically arranged on the support plate (103), an impact cylinder (105) is installed at the telescopic end of the third telescopic cylinder (104), the impact cylinder (105) is horizontally arranged and a knocking ball (107) is installed at the impact end through a mounting seat (106), so that the two knocking balls (107) can respectively perform a knocking action from the side of the kiln body (1).

10. A rotary kiln with self-cleaning capability according to claim 9, characterized in that: The knocking structure (10) further comprises a threaded rod (108), one end of the threaded rod (108) being fixedly arranged on the knocking ball (107), and the other end of the threaded rod (108) being threadedly connected to the mounting seat (106).

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