A vertical pyrolysis furnace and method for treating plateau garbage

Abstract

The present invention relates to the technical field of pyrolysis treatment of garbage, and specifically discloses a vertical pyrolysis furnace and method for treating plateau garbage. In the present invention, a first annular grate and a second annular grate are coaxially staggered along the radial direction of the pyrolysis chamber, and several first annular grates and second annular grates are coaxially staggered. The driving component can drive the first annular grate / second annular grate in contact with the furnace wall to rotate, so as to drive the garbage in contact with the furnace wall to roll in contact with the furnace wall along the circumference of the furnace wall, so that the furnace wall is evenly heated in the circumferential direction. The driving component can also drive the first annular grate and the second annular grate to rotate in an staggered manner, so as to drive the garbage in contact with the circular grate assembly to roll on the circular grate assembly, thereby preventing plateau garbage with different calorific values ​​from being fixed in contact with the circular grate assembly, and preventing the circular grate assembly from being heated unevenly, thereby reducing the service life of the grate.

Description

Technical Field

[0001] The present invention relates to the technical field of pyrolysis treatment of garbage, and in particular to a vertical pyrolysis furnace and method for treating plateau garbage. Background Art

[0002] Vertical garbage pyrolysis furnace is a commonly used device for incineration and treatment of garbage. However, in the plateau environment, the temperature is generally low, resulting in ice often forming in the plateau garbage, making the moisture content of the plateau garbage generally high, resulting in uneven distribution of the calorific value of the plateau garbage in the pyrolysis furnace.

[0003] In the pyrolysis furnace, the calorific value of plateau garbage is unevenly distributed, which causes the furnace wall and the grate at the bottom of the pyrolysis furnace to be heated unevenly, reducing the service life of the pyrolysis furnace and increasing the cost of garbage disposal. Summary of the Invention

[0004] In response to the above-mentioned problems in the prior art, the present invention provides a vertical pyrolysis furnace and method for treating plateau garbage, the purpose of which is to uniformly heat the furnace wall and the circular grate assembly and extend the service life of the two.

[0005] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is as follows:

[0006] Provided is a vertical pyrolysis furnace for processing plateau garbage, comprising: a furnace body, a pyrolysis chamber for pyrolyzing the garbage is provided in the furnace body, a circular grate assembly for carrying the garbage is rotatably installed in the pyrolysis chamber, the circular grate assembly comprising: a first annular grate and a second annular grate, wherein a plurality of first annular grates and second annular grates are coaxially staggered along the radial direction of the pyrolysis chamber; a driving component capable of driving the first annular grate / the second annular grate to rotate, thereby driving the garbage to roll in contact with the furnace wall; and capable of driving the first annular grate and the second annular grate to rotate in an staggered manner, thereby driving the garbage in contact with the circular grate assembly to roll on the circular grate assembly.

[0007] Furthermore, the pyrolysis furnace also includes: a plurality of slag leakage holes, which are opened on the circular grate assembly along the circumferential direction for ash to fall; a plurality of scrapers, which correspond to the slag leakage holes one by one and are installed obliquely on the circular grate, and the scrapers can cover the slag leakage holes in the axial projection of the pyrolysis chamber; the scrapers can prevent the garbage from falling from the slag leakage holes when in forward contact with the garbage, and can scrape off the ash and make it fall from the slag leakage holes when in reverse contact with the garbage.

[0008] Furthermore, the driving component includes: a central rotating shaft, which is fixedly installed with the first annular grate and rotatably installed with the second annular grate; a first driving motor, which is used to drive the first annular grate to rotate; a second driving motor, which is used to drive the second annular grate to rotate; and the first annular grate and the second annular grate are installed at different heights on the central rotating shaft, and the width of the scraper is smaller than the width of the first annular grate / the second annular grate; the scraper on the first annular grate is between the two second annular grates, and the staggered rotation of the first annular grate and the second annular grate can drive the scraper on the first annular grate and the second annular grate to crush the slag clumps.

[0009] Furthermore, the pyrolysis furnace includes at least two first annular grates and two second annular grates, wherein one of the first annular grates is fixedly mounted on the central rotating shaft; it also includes: an annular support platform and an annular mounting platform, three annular support platforms are rotatably mounted on the annular mounting platform, and the three annular support platforms are respectively fixedly connected to one first annular grate and two second annular grates; an annular lifting platform, which is liftably mounted below the annular support platform; a plurality of push rods, which are located below the second annular grate and are vertically mounted on the annular lifting platform; the annular lifting platform can drive the push rods to lift / lower the second annular grate by performing an ascending / descending movement along a straight line.

[0010] Furthermore, the pyrolysis furnace also includes: a plurality of ball bearings, which are rollingly embedded and installed on the annular mounting platform for rolling contact with the annular support platform; a plurality of annular guide ribs, which are fixedly arranged on the annular mounting platform and can be intermittently installed with the annular support platform for guiding the annular support platform to rotate on the annular mounting platform; a plurality of annular racks, which are respectively installed on a first annular grate and two second annular grates; a driving gear, which is meshed with the annular rack and includes: a first driving gear for driving the first annular grate to rotate and a second driving gear for driving the second annular grate to rotate; the first driving gear is fixedly installed on the output shaft of the first driving motor; the second driving gear is fixedly installed on the output shaft of the second driving motor, and the length of the second driving gear extends along the length direction of the top rod.

[0011] Furthermore, the pyrolysis furnace also includes: a feeding port, which is opened at the end of the furnace body along the radial direction of the furnace body; a first conveyor belt, which is used to transport garbage; a sparging roller, which is rotatably installed at one end of the first conveyor belt; a feeding port, which is opened on the sparging roller along the axial direction of the sparging roller, and is used to receive garbage; a third drive motor, which is transmission-connected to the sparging roller and can drive the sparging roller to perform a reciprocating rotation of a fixed amplitude, so as to level the garbage in the sparging roller; a discharging port, which is opened on the sparging roller along the axial direction of the sparging roller, and is used to output garbage; a second conveyor belt, which is arranged below the discharging port, is used to receive the garbage output by the sparging roller and send it to the feeding port, and the width of the second conveyor belt is equal to the radius of the pyrolysis chamber.

[0012] Furthermore, along the radial direction of the material distributing drum, the width of the discharge port gradually decreases.

[0013] Furthermore, a sealing assembly is provided below the discharge port, which includes: two sealing blocks and a telescopic component slidably installed below the discharge port. The piston rod of the telescopic component can perform telescopic movement to enable the sealing blocks to perform linear sliding movement toward / away from each other, thereby sealing / opening the discharge port.

[0014] A method for processing plateau garbage in a vertical pyrolysis furnace comprises the following steps: S1. inputting garbage to be pyrolyzed into a screed drum via a first conveyor belt; S2. driving the screed drum to perform a reciprocating rotational motion with a fixed amplitude via a third drive motor to level the garbage in the screed drum; S3. driving a blocking component to open a discharge port, and rotating a second conveyor belt at a constant speed to deliver the garbage to the feed port; S4. rotating a first annular grate and a second annular grate synchronously and in the same direction to receive and spread the garbage; S5. pyrolyzing the garbage in a pyrolysis chamber.

[0015] Furthermore, in S5, in the early stage of garbage pyrolysis, the first annular grate and the second annular grate rotate at the same horizontal height, both driving the scrapers to contact the garbage in the forward direction; in the middle stage of garbage pyrolysis, the first annular grate and the second annular grate rotate at the same horizontal height, and the scrapers on the first annular grate and the scrapers on the second annular grate alternately contact the garbage in the reverse direction; in the late stage of garbage pyrolysis, the second annular grate rises, and the rotation of the first annular grate and the second annular grate both drive the scrapers to contact the garbage in the reverse direction.

[0016] The beneficial effects of the present invention are as follows: in the present invention, the driving component can drive the first annular grate / second annular grate in contact with the furnace wall to rotate, so as to drive the garbage in contact with the furnace wall to roll in contact with the furnace wall along the circumference of the furnace wall, so that the furnace wall is evenly heated in the circumferential direction; the driving component can also drive the first annular grate and the second annular grate to rotate alternately, so as to drive the garbage in contact with the circular grate assembly to roll on the circular grate assembly, prevent plateau garbage with different calorific values ​​from being fixed in contact with the circular grate assembly, prevent the circular grate assembly from being heated unevenly, and reduce the service life of the grate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A cross-sectional view of the circular grate assembly provided in Example 1 installed in a pyrolysis chamber;

[0018] Figure 2 A top view of the circular grate assembly provided in Example 1;

[0019] Figure 3 A side view of the scraper provided in Example 2 installed on the first annular grate and the second annular grate;

[0020] Figure 4 A cross-sectional view of the circular grate assembly, annular support platform, and annular mounting platform provided in Example 3;

[0021] Figure 5 A schematic diagram of the push rod provided in Example 3 lifting the second annular grate;

[0022] Figure 6 for Figure 5 A magnified schematic diagram of point A;

[0023] Figure 7 A top view of the second conveyor belt and the feed port provided in Example 3;

[0024] Figure 8 Schematic diagram of the installation of the material leveling roller, the first conveyor belt and the second conveyor belt provided in Example 3;

[0025] Figure 9 A side view of the installation of the screed roller and the blocking block provided in Example 3;

[0026] Figure 10 A schematic diagram of the state of the second conveyor belt receiving garbage provided in Example 3;

[0027] Among them, 1. furnace body; 11. pyrolysis chamber; 12. feed port; 21. first annular grate; 22. second annular grate; 23. slag leakage hole; 24. scraper; 31. central shaft; 32. first drive motor; 33. second drive motor; 41. annular support platform; 42. annular mounting platform; 421. ball bearing; 422. annular guide rib; 43. annular lifting platform; 44. ejector rod; 441. bearing; 45. annular rack; 461. first drive gear; 462. second drive gear; 47. hydraulic cylinder; 51. first conveyor belt; 52. second conveyor belt; 53. material leveling roller; 531. feed port; 532. discharge port; 54. third drive motor; 61. blocking block; 62. telescopic component; 621. piston rod; 7. conical baffle. DETAILED DESCRIPTION

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] It can be understood that the pyrolysis process of garbage in the pyrolysis chamber can be decomposed into: heating stage, partial garbage combustion stage and complete garbage combustion stage; corresponding to the early stage of garbage pyrolysis, the middle stage of garbage pyrolysis and the late stage of garbage pyrolysis respectively.

[0030] Example 1

[0031] Reference Figure 1 and Figure 2As shown, this embodiment provides a vertical pyrolysis furnace for treating plateau garbage, including: a furnace body 1, a pyrolysis chamber 11 for pyrolyzing garbage is provided in the furnace body 1, and a circular grate assembly for carrying garbage is rotatably installed in the pyrolysis chamber 11.

[0032] Specifically, the circular grate assembly includes: a first annular grate 21 and a second annular grate 22 . Along the radial direction of the pyrolysis chamber 11 , a plurality of first annular grates 21 and second annular grates 22 are coaxially and staggeredly installed.

[0033] In the initial stage of garbage pyrolysis, the driving component can drive the first annular grate 21 / the second annular grate 22 in contact with the furnace wall to rotate, so as to drive the garbage in contact with the furnace wall to roll along the circumference of the furnace wall, so that the furnace wall is heated evenly in the circumferential direction, thereby preventing the calorific value of the plateau garbage from being unevenly distributed when it is heated in the pyrolysis chamber 11, thereby reducing the service life of the furnace body 1.

[0034] The driving component can also drive the first annular grate 21 and the second annular grate 22 to rotate alternately, thereby driving the garbage in contact with the circular grate assembly to roll on the circular grate assembly. The staggered rotation of the first annular grate 21 and the second annular grate 22 can drive the garbage in contact with both the first annular grate 21 and the second annular grate to roll on the circular grate assembly, preventing plateau garbage with different calorific values ​​from being fixed in contact with the circular grate assembly, preventing uneven heating of the circular grate assembly, and reducing the service life of the grate.

[0035] It can be understood that, in this embodiment, the staggered rotation includes: the first annular grate 21 and the second annular grate 22 rotating in the same direction at different speeds and rotating in opposite directions, so as to achieve staggered rotation of the first annular grate 21 and the second annular grate.

[0036] Example 2

[0037] Reference Figure 1-Figure 3 As shown, in the embodiment of this city, the pyrolysis furnace also includes: a plurality of slag holes 23, which are opened on the circular grate assembly along the circumferential direction for ash to fall; a plurality of scrapers 24, which correspond to the slag holes 23 one by one and are installed obliquely on the circular grate, and the scrapers 24 are projected in the axial direction of the pyrolysis chamber 11. The scrapers 24 can cover the slag holes 23 to prevent unpyrolyzed garbage from falling directly out of the pyrolysis chamber 11; the scrapers 24 can prevent the garbage from falling from the slag holes 23 in the forward contact with the garbage, and can scrape off the ash and drop it from the slag holes 23 in the reverse contact with the garbage.

[0038] In the middle stage of garbage pyrolysis, part of the garbage has completed pyrolysis, and the driving component is used to drive the first annular grate 21 and the second annular grate 22 to rotate in the same direction, which can drive part of the scrapers 24 on the first annular grate 21 / the second annular grate 22 to contact the garbage in the reverse / forward direction, thereby driving part of the scrapers 24 to scrape off the ash and drop it from the ash leakage hole 23; in the middle stage of garbage pyrolysis, part of the ash that has completed pyrolysis can be discharged in time, thereby reducing the slag content in the pyrolysis chamber 11 and improving the pyrolysis efficiency of the garbage.

[0039] In the later stage of garbage pyrolysis, the garbage completes the pyrolysis work, and the driving component drives the first annular grate 21 and the second annular grate 22 to rotate alternately, which can drive the scrapers 24 on the first annular grate 21 and the second annular grate 22 to contact the garbage in reverse, and discharge the ash that has been completely pyrolyzed out of the pyrolysis chamber 11.

[0040] It is easy to understand that the scraper 24 is installed at an angle, and the two angles between the scraper 24 and the circular grate assembly are: an obtuse angle α and an acute angle β. The circular grate assembly is rotated to drive the open angle end of α to move toward the garbage, which is a forward contact. The circular grate assembly is rotated to drive the open angle end of β to move toward the garbage, which is a reverse contact.

[0041] Specifically, the driving components include: a central rotating shaft 31, which is fixedly installed with the first annular grate 21 (can be installed by welding or other methods), and is rotatably installed with the second annular grate 22 (can be rotatably installed by bearings 441); a first driving motor 32, used to drive the first annular grate 21 to rotate; and a second driving motor 33, used to drive the second annular grate 22 to rotate.

[0042] It can be understood that the first drive motor 32 is connected to the central rotating shaft 31 through gears, and the first annular grate 21 can be driven to rotate by rotating the output shaft of the first drive motor 32; the second drive motor 33 is also connected to the second annular grate 22 through gears, and the second annular grate 22 can be driven to rotate by rotating the output shaft of the second drive motor 33.

[0043] It is worth mentioning that the first annular grate 21 and the second annular grate 22 are installed at different heights on the central rotating shaft 31, and the width of the scraper 24 is smaller than the width of the first annular grate 21 / the second annular grate 22; in the later stage of garbage pyrolysis, the scraper 24 on the first annular grate 21 is between the two second annular grates 22, and the staggered rotation of the first annular grate 21 and the second annular grate 22 can drive the scraper 24 on the first annular grate 21 and the side wall of the second annular grate 22 to generate shear force, thereby breaking up the slag mass, which can not only break up the incompletely pyrolyzed garbage mass but also ensure the smooth discharge of ash.

[0044] Example 3

[0045] Reference Figure 4-Figure 6 As shown, in this embodiment, the pyrolysis furnace includes at least two first annular grates 21 and two second annular grates 22, wherein one of the first annular grates 21 is fixedly mounted on the central rotating shaft 31; it also includes: an annular support platform 41 and an annular mounting platform 42, three annular support platforms 41 are rotatably mounted on the annular mounting platform 42, and the three annular support platforms 41 are respectively fixedly connected to a first annular grate 21 and two second annular grates 22; an annular lifting platform 43, which is liftably mounted below the annular support platform 41; and a plurality of top rods 44, which are located below the second annular grate 22 and are vertically mounted on the annular lifting platform 43.

[0046] In this embodiment, the annular lifting platform 43 can move up / down in a straight line to drive the push rod 44 to lift / lower the second annular grate 22; the installation heights of the first annular grate 21 and the second annular grate 22 can be switched, and the first annular grate 21 and the second annular grate 22 can be placed at the same installation height, so that the garbage can be spread flat in the early stage of garbage pyrolysis to ensure the heating effect in the early stage of garbage pyrolysis; the first annular grate 21 and the second annular grate 22 can also be placed at different installation heights to meet the slag scraping and slag discharge work in the middle and late stages of garbage pyrolysis.

[0047] Specifically, the pyrolysis furnace also includes: a plurality of balls 421, which are rollingly embedded and installed on the annular mounting platform 42, and are used for rolling contact with the annular support platform 41, so as to realize the rotation of the annular support platform 41 on the annular mounting platform 42; a plurality of annular guide ribs 422, which are fixedly arranged on the annular mounting platform 42 and can be intermittently installed with the annular support platform 41, and are used to guide the annular support platform 41 to rotate on the annular mounting platform 42.

[0048] It is worth mentioning that a bearing 441 for rotatable contact with the annular support platform 41 is also installed at the end of the top rod 44; a hydraulic cylinder 47 is installed between the annular lifting platform 43 and the ground, and the annular lifting platform 43 is driven to move up and down by the lifting and lowering of the piston rod 621 of the hydraulic cylinder 47.

[0049] The system further includes a plurality of annular racks 45, each mounted on a first annular grate 21 and two second annular grates 22; and drive gears meshing with the annular racks 45. The system further includes a first drive gear 461 for driving the first annular grate 21 to rotate, and a second drive gear 462 for driving the second annular grate 22 to rotate.

[0050] It can be understood that the first drive gear 461 is fixedly mounted on the output shaft of the first drive motor 32; the second drive gear 462 is fixedly mounted on the output shaft of the second drive motor 33, and the first annular grate 21 and the second annular grate 22 can be driven to rotate by rotating the output shafts of the first drive motor 32 and the second drive motor 33.

[0051] Of course, the length of the second driving gear 462 extends along the length direction of the top rod 44 to meet the driving requirements after the second annular grate 22 is raised and lowered.

[0052] It is worth mentioning that a number of conical baffles 7 are installed between the annular support platform 41 and the circular grate assembly to guide the ash to fall.

[0053] Reference Figure 7-10 As shown, the pyrolysis furnace also includes: a feeding port 12, which is opened at the end of the furnace body 1 along the radial direction of the furnace body 1; a first conveyor belt 51 for conveying garbage; a sparging roller 53, rotatably mounted on one end of the first conveyor belt 51; a feeding port 531, which is opened on the sparging roller 53 along the axial direction of the sparging roller 53, for receiving garbage; a third driving motor 54, which is transmission-connected to the sparging roller 53 (in this embodiment, it is connected by gear transmission), and can drive the sparging roller 53 to perform a reciprocating rotation motion of a fixed amplitude, so as to level the garbage in the sparging roller 53; a discharging port 532, which is opened on the sparging roller 53 along the axial direction of the sparging roller 53, for outputting garbage; a second conveyor belt 52, which is arranged below the discharging port 532, for receiving the garbage output by the sparging roller 53 and sending it to the feeding port 531, and the width of the second conveyor belt 52 is equal to the radius of the pyrolysis chamber 11.

[0054] A sealing assembly is provided below the discharge port 532, and the sealing assembly includes: two sealing blocks 61 and a telescopic component 62 slidably installed below the discharge port 532. The piston rod 621 of the telescopic component 62 can perform telescopic movement to enable the sealing block 61 to perform linear sliding movement toward / away from each other, thereby sealing / opening the discharge port 532.

[0055] During specific use, the material is fed into the material distribution drum 53 in stages through the first conveyor belt 51, and then the output shaft of the third drive motor 54 rotates back and forth to drive the material distribution drum 53 to perform a reciprocating rotation motion with a fixed amplitude, so as to level the garbage in the material distribution drum 53; then the piston rod 621 of the telescopic component 62 is driven to perform a contraction motion to drive the blocking block 61 to perform a linear sliding motion away from each other, so as to open the discharge port 532; and along the radial direction of the material distribution drum 53, the width of the discharge port 532 gradually decreases, and the garbage in the material distribution drum 53 falls evenly under the action of gravity and is spread flat on the second conveyor belt 52; the second conveyor belt 52 continues to transport and feed the material into the pyrolysis chamber 11.

[0056] It can be understood that the feed port 12 is opened along the radial direction of the furnace body 1, and the circular grate assembly at the bottom of the furnace body 1 rotates to spread the garbage dropped from the second conveyor belt 52 onto the circular grate assembly.

[0057] In this embodiment, a material distribution roller 53 and a second conveyor belt 52 are provided between the first conveyor belt 51 and the furnace body 1 to spread the waste to be pyrolyzed evenly on the circular grate assembly, ensuring a consistent height of the waste in the radial direction of the circular grate assembly and effectively ensuring uniform heating during the initial stages of waste pyrolysis. This eliminates the drawback of conventional techniques of directly dumping waste into the pyrolysis chamber 11, which results in uneven waste height.

[0058] It is worth mentioning that the telescopic component 62 is an electric telescopic rod, which is fixedly installed, and the piston rod 621 of the electric telescopic rod is fixedly connected to the blocking block 61.

[0059] Example 4

[0060] In this embodiment, a method for treating plateau garbage in a vertical pyrolysis furnace is provided, comprising the following steps: S1. inputting garbage to be pyrolyzed into a screed drum 53 through a first conveyor belt 51; S2. driving the screed drum 53 to perform a reciprocating rotation motion with a fixed amplitude through a third drive motor 54, so as to level the garbage in the screed drum 53; S3. driving the blocking component to open the discharge port 532, and the second conveyor belt 52 to rotate at a constant speed to deliver the garbage to the feed port 12; S4. the first annular grate 21 and the second annular grate 22 rotate synchronously and in the same direction to receive and spread the garbage; S5. pyrolyzing the garbage in the pyrolysis chamber 11.

[0061] Furthermore, in S5, in the early stage of garbage pyrolysis, the first annular grate 21 and the second annular grate 22 rotate at the same horizontal height, both driving the scraper 24 to contact the garbage in the forward direction; in the middle stage of garbage pyrolysis, the first annular grate 21 and the second annular grate 22 rotate at the same horizontal height, and the scraper 24 on the first annular grate 21 and the scraper 24 on the second annular grate 22 alternately contact the garbage in the reverse direction; in the late stage of garbage pyrolysis, the second annular grate 22 rises, and the rotation of the first annular grate 21 and the second annular grate 22 both drive the scraper 24 to contact the garbage in the reverse direction.

[0062] By using this method, the garbage to be pyrolyzed can be spread flat in the pyrolysis chamber 11, ensuring that the height of the garbage in the radial direction of the circular grate assembly is consistent, and effectively ensuring the uniformity of temperature rise in the initial stage of garbage pyrolysis; the scrapers 24 on the first annular grate 21 and the scrapers 24 on the second annular grate 22 are in reverse contact with the garbage alternately, and can timely discharge some of the ash that has been pyrolyzed in the middle stage of garbage pyrolysis; the second annular grate 22 can be raised and lowered to change the installation height relative to the first annular grate 21. In the later stage of garbage pyrolysis, the staggered rotation of the first annular grate 21 and the second annular grate 22 can drive the scrapers 24 on the first annular grate 21 and the side walls of the second annular grate 22 to generate shear force, thereby breaking up the slag clumps, which can not only break up the garbage clumps that are not completely pyrolyzed but also ensure the smooth discharge of ash slag.

[0063] It will be understood by those skilled in the art that although preferred embodiments of the present invention have been described, further changes and modifications may be made to these embodiments once those skilled in the art are aware of the underlying inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, the present invention is intended to include such changes and modifications as fall within the scope of the claims and equivalents of the present invention.

Claims

1. A vertical pyrolysis furnace for treating plateau garbage, comprising: A furnace body (1) is provided with a pyrolysis chamber (11) for pyrolyzing garbage, and a circular grate assembly for carrying garbage is rotatably installed in the pyrolysis chamber (11), characterized in that: The circular grate assembly includes: A first annular grate (21) and a second annular grate (22) are coaxially and staggeredly installed along the radial direction of the pyrolysis chamber (11); The driving component can drive the first annular grate (21) / the second annular grate (22) to rotate, thereby driving the garbage to roll in contact with the grate wall; and can also drive the first annular grate (21) and the second annular grate (22) to rotate alternately, thereby driving the garbage in contact with the circular grate assembly to roll on the circular grate assembly; A plurality of slag holes (23) are provided on the circular grate assembly along the circumferential direction for ash to fall; A plurality of scrapers (24) are arranged in one-to-one correspondence with the slag leakage holes (23), and are obliquely mounted on the circular grate. The scrapers (24) are projected in the axial direction of the pyrolysis chamber (11) so as to cover the slag leakage holes (23). The scraper (24) contacts the garbage in the forward direction to prevent the garbage from falling from the slag leakage hole (23); the scraper (24) contacts the garbage in the reverse direction to scrape off the ash and make it fall from the slag leakage hole (23).

2. The vertical pyrolysis furnace for treating plateau garbage according to claim 1, characterized in that: The drive components include: A central rotating shaft (31) is fixedly mounted on the first annular grate (21) and rotatably mounted on the second annular grate (22); a first driving motor (32), configured to drive the first annular grate (21) to rotate; a second driving motor (33), used for driving the second annular grate (22) to rotate; The first annular grate (21) and the second annular grate (22) are installed at different heights on the central rotating shaft (31); the width of the scraper (24) is smaller than the width of the first annular grate (21) / the second annular grate (22); the scraper (24) on the first annular grate (21) is located between the two second annular grates (22); the staggered rotation of the first annular grate (21) and the second annular grate (22) can drive the scraper (24) on the first annular grate (21) and the second annular grate (22) to crush the slag mass.

3. The vertical pyrolysis furnace for treating plateau garbage according to claim 2, characterized in that: The invention comprises at least two first annular grates (21) and two second annular grates (22), wherein one of the first annular grates (21) is fixedly mounted on a central rotating shaft (31); Also includes: An annular support platform (41) and an annular mounting platform (42), wherein the three annular support platforms (41) are rotatably mounted on the annular mounting platform (42), and the three annular support platforms (41) are fixedly connected to a first annular grate (21) and two second annular grates (22), respectively; An annular lifting platform (43) is installed below the annular support platform (41) in a liftable manner; A plurality of push rods (44) are located below the second annular grate (22) and are vertically mounted on the annular lifting platform (43); The annular lifting platform (43) can move up / down along a straight line to drive the push rod (44) to lift up / lower the second annular grate (22).

4. The vertical pyrolysis furnace for treating plateau garbage according to claim 3, characterized in that: Also includes: A plurality of balls (421) are rollingly embedded and mounted on the annular mounting platform (42) for rolling contact with the annular supporting platform (41); A plurality of annular guide ribs (422) are fixedly arranged on the annular mounting platform (42) and can be intermittently mounted with the annular support platform (41) to guide the annular support platform (41) to rotate on the annular mounting platform (42); A plurality of annular racks (45) are respectively installed on a first annular grate (21) and two second annular grates (22); A driving gear is mounted in mesh with the annular rack (45), and includes: a first driving gear (461) for driving the first annular grate (21) to rotate, and a second driving gear (462) for driving the second annular grate (22) to rotate; The first driving gear (461) is fixedly mounted on the output shaft of the first driving motor (32); The second driving gear (462) is fixedly mounted on the output shaft of the second driving motor (33), and the length of the second driving gear (462) extends along the length direction of the push rod (44).

5. The vertical pyrolysis furnace for treating plateau garbage according to claim 3, characterized in that: Also includes: A feeding port (12) is provided at an end of the furnace body (1) along a radial direction of the furnace body (1); A first conveyor belt (51) for conveying garbage; a material leveling roller (53) rotatably mounted on one end of the first conveyor belt (51); A feed port (531) is provided on the material distribution drum (53) along the axial direction of the material distribution drum (53) for receiving garbage; The third driving motor (54) is connected to the material leveling drum (53) and can drive the material leveling drum (53) to perform a reciprocating rotation with a fixed amplitude, thereby leveling the garbage in the material leveling drum (53); A discharge port (532) is provided on the material distributing roller (53) along the axial direction of the material distributing roller (53) for discharging garbage; The second conveyor belt (52) is arranged below the discharge port (532) and is used to receive the garbage output by the material leveling roller (53) and send it to the feed port (531). The width of the second conveyor belt (52) is equal to the radius of the pyrolysis chamber (11).

6. The vertical pyrolysis furnace for treating plateau garbage according to claim 5, characterized in that: Along the radial direction of the material leveling roller (53), the width of the discharge port (532) gradually decreases.

7. The vertical pyrolysis furnace for treating plateau garbage according to claim 5, characterized in that: A blocking assembly is provided below the discharge port (532), comprising: two blocking blocks (61) and a telescopic component (62) slidably mounted below the discharge port (532); the piston rod (621) of the telescopic component (62) performs telescopic movement to enable the blocking block (61) to perform linear sliding movement toward / away from each other, thereby blocking / opening the discharge port (532).

8. A method for treating plateau garbage using a vertical pyrolysis furnace according to claim 7, characterized in that: The following steps are involved: S1. The waste to be pyrolyzed is input into the material drum (53) through the first conveyor belt (51); S2. The sparging drum (53) is driven by a third drive motor (54) to perform a reciprocating rotational motion of a fixed amplitude, so as to shake the garbage inside the sparging drum (53); S3 drives the blocking assembly to open the discharge port (532), and the second conveyor belt (52) rotates at a constant speed to deliver the garbage to the feed port (12); S4. The first annular grate (21) and the second annular grate (22) rotate synchronously and in the same direction to receive and lay out the garbage; S5. Pyrolyze the garbage in the pyrolysis chamber (11).

9. The method for treating plateau garbage in a vertical pyrolysis furnace according to claim 8, characterized in that: In S5, at the initial stage of garbage pyrolysis, the first annular grate (21) and the second annular grate (22) rotate at the same level, both driving the scraper (24) to contact the garbage in the forward direction; In the middle stage of garbage pyrolysis, the first annular grate (21) and the second annular grate (22) rotate at the same level, and the scrapers (24) on the first annular grate (21) and the scrapers (24) on the second annular grate (22) alternately contact the garbage in opposite directions; In the late stage of garbage pyrolysis, the second annular grate (22) rises, and the rotation of the first annular grate (21) and the second annular grate (22) drives the scraper (24) to contact the garbage in reverse.

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