Gasifier grate suitable for lignite

Abstract

The present application relates to the technical field of gasification furnace grate, and disclose a kind of gasification furnace grate suitable for lignite, including furnace grate main body;Furnace grate main body includes a plurality of sequentially arranged furnace grate disc from top to bottom, the diameter of multiple furnace grate disc sequentially increases from top to bottom, the lowermost furnace grate disc is installed with the broken slag component for crushing slag;Broken slag component includes broken slag plate, the lowermost furnace grate disc is installed with a plurality of circumferentially arranged broken slag plate, and partition is connected between adjacent broken slag plate;When furnace grate main body rotates, drive broken slag plate to crush massive slag material.The present application is rotated by broken slag plate and elastic cable to realize the active crushing and partition of large block slag, V-shaped part is arranged between elastic cable, and the broken slag rod is used to fill the small block slag crushing blind area by dynamic change of included angle, torsional spring energy storage type piercing element is configured on broken slag rod, to overcome hard slag by impact action, bottom extrusion part eliminates crushing dead angle, to realize the uniform crushing and smoothness of slag discharge.

Description

Technical Field

[0001] This invention relates to the field of gasifier grate technology, and more particularly to a gasifier grate suitable for lignite. Background Technology

[0002] In the process of gasifying low-calorific-value lignite using a gasifier, the lignite is fed into the furnace and placed on a rotating grate. The grate surface is provided with gasifying agent distribution holes. The gasifying agent is introduced into the grate through the gas inlet pipe and discharged evenly through the distribution holes. It reacts with the coal to promote its combustion and gasification, generating crude syngas (pre-produced gas). This gas then enters the subsequent purification and methanation system to refine natural gas. During this process, the rotation of the grate drives the coal bed and slag to move radially, and promotes the orderly discharge of ash from the edge of the grate.

[0003] However, due to its high volatile matter and low strength, lignite is prone to fragmentation during pyrolysis and gasification, generating coke particles with small size and high adhesion. These fine coke particles are prone to recombination or sintering under high-temperature reducing action, thus forming large, dense blocky slag. During the slag discharge process of the rotating grate, such large slag particles are prone to getting stuck and accumulating at the edge of the grate, and cannot be discharged smoothly through the conventional slag discharge port. The current conventional grate structure only has the function of pushing and guiding loose ash and slag, and lacks the ability to crush, disperse or actively remove large, sticky slag particles, which leads to the problem of aggravated slag accumulation and blockage of slag discharge channels.

[0004] To address the aforementioned issues, this application proposes a gasifier grate suitable for lignite. Summary of the Invention

[0005] This invention proposes a gasifier grate suitable for lignite, which solves the problem in related technologies where the fine coke produced by lignite pyrolysis and gasification sintersects at high temperatures to form large, dense slag, which cannot be broken and removed by conventional grates, leading to blockage and slag discharge channels.

[0006] The present invention proposes a gasifier grate suitable for lignite, comprising a grate body;

[0007] The grate body includes multiple grate plates arranged sequentially from top to bottom, with the diameter of the multiple grate plates increasing sequentially from top to bottom. The bottom grate plate is equipped with a slag-breaking component for crushing slag.

[0008] The slag breaking assembly includes slag breaking plates. Multiple circumferentially arranged slag breaking plates are installed on the bottom grate, and each adjacent slag breaking plate is connected by a dividing part.

[0009] When the grate body rotates, it drives the slag-breaking plates to crush the lumpy slag material, and the slag material is divided by the dividing section between adjacent slag-breaking plates.

[0010] As a further optimization of the present invention, the segmentation part includes elastic steel cables, and two elastic steel cables are connected between adjacent slag breaking plates.

[0011] As a further optimization of the present invention, the top of the slag breaking plate is provided with multiple arc-shaped openings, and slag breaking protrusions are formed between the multiple arc-shaped openings.

[0012] As a further optimization of the present invention, a plurality of V-shaped sections for assisting in the division of slag are installed between the two elastic steel cables, and the V-shaped sections are used to cooperate with the elastic steel cables to compress the slag.

[0013] As a further optimization of the present invention, the V-shaped part includes two slag-breaking rods, which form a V-shaped structure. The adjacent ends of the two slag-breaking rods are hinged to each other, and the ends of the two slag-breaking rods that are far apart are respectively hinged to two elastic steel cables. Both slag-breaking rods are equipped with piercing parts, and the piercing parts extend between the two slag-breaking rods.

[0014] As a further optimization of the present invention, the piercing component includes a loading rod, with multiple spaced loading rods rotatably connected to both slag-breaking rods, and the loading rods extending between the two slag-breaking rods. A piercing part is installed at the top of the loading rod, and a torsion spring is sleeved on the loading rod, with both ends of the torsion spring connected to the slag-breaking rod and the piercing part, respectively. A threaded groove is opened at the bottom of the loading rod, and a screw is threadedly connected in the threaded groove. A pressing part is installed at the bottom of the screw.

[0015] As a further optimization of the present invention, the piercing part includes a disc, the top end of the loading rod is mounted with the disc, and one end of the torsion spring is connected to the disc, and a plurality of circumferentially arranged spikes are mounted on the disc.

[0016] As a further optimization of the present invention, the extrusion part is a sphere, and the sphere is installed at the bottom end of the screw.

[0017] As a further optimization of the present invention, the extrusion part is a conical head, which is installed at the bottom end of the screw.

[0018] As a further optimization of the present invention, the grate is equipped with a plurality of arc-shaped ash-pushing ribs arranged in a circular array.

[0019] The above-described technical solution of the present invention has the following beneficial technical effects:

[0020] 1. When the grate body is working, it can drive the rotation of multiple circumferentially arranged slag-breaking plates on the bottom grate plate. During the rotation process, the slag-breaking plates break the lumpy slag formed after the combustion of lignite. The two elastic steel cables between adjacent slag-breaking plates can divide the slag to improve the crushing effect of the slag-breaking plates. As the elastic steel cables follow the rotation, some lumpy slag moves between the two elastic steel cables. With the rotation of the grate body, the lumpy slag can be squeezed and broken between the two elastic steel cables, further improving the crushing effect of the lumpy slag. The above design, through the rotational cooperation of the slag-breaking plates and elastic steel cables, can actively crush and divide large pieces of sticky slag, reduce the size and adhesion of the lumpy slag, effectively alleviate the jamming and accumulation problem in the edge area of ​​the grate body, and improve the smoothness of slag discharge.

[0021] 2. While large slag pieces can be crushed through the combined action of the slag-breaking plate and the elastic steel cable, the crushing effect is not ideal for smaller pieces. Therefore, multiple spaced V-shaped sections are installed between the two elastic steel cables. When the grate body rotates, driving the slag-breaking plate and the elastic steel cable, smaller slag pieces can be crushed through the V-shaped sections between the two elastic steel cables. Furthermore, the V-shaped sections can assist the slag-breaking plate and the elastic steel cable in breaking large slag pieces into smaller ones. When smaller slag pieces are placed within the V-shaped sections, the grate... The rotation of the main body allows the two slag-breaking rods in the V-shaped section to move closer together under the cooperation of the two slag-breaking components. The angle between the two slag-breaking rods changes, which squeezes and crushes small pieces of slag. The V-shaped section fills the gap in the crushing capacity of the slag-breaking plate and elastic steel cable for small pieces of slag. By dynamically changing the angle of the slag-breaking rods, the slag is squeezed and crushed, expanding the range of crushed particle size coverage. At the same time, it helps to refine large pieces of slag, so that slag of mixed particle size can be effectively processed, further reducing the risk of slag discharge channel blockage.

[0022] 3. Due to the compactness of the lumpy slag, simply crushing it through the V-shaped section during rotation can easily result in hard impact. Therefore, a piercing element is installed on the slag-breaking rod in the V-shaped section. When the grate body drives the slag-breaking rod to rotate, the piercing part in the piercing element can pierce the lumpy slag. When encountering some harder slag, the piercing part on the loading rod can be deflected under the action of the torsion spring. The kinetic energy during the recovery is used to quickly pierce some harder lumpy slag in conjunction with the piercing part. The above design, by installing a piercing element with a piercing part and a torsion spring on the slag-breaking rod, can not only actively pierce the lumpy slag during rotation, but also use the torsion spring to store and release energy when encountering harder slag, generating an impact piercing action. This effectively overcomes the difficulty of crushing hard slag and reduces the risk of hard impact damage.

[0023] 4. When the grate body drives the V-shaped section on the elastic steel cable to rotate, the two slag-breaking rods in the V-shaped section approach each other and squeeze the slag material. The slag material can be squeezed and crushed by the extrusion section installed at the bottom of the loading rod, reducing the dead corners of the two slag-breaking rods squeezing and crushing the blocky slag material. The above design can fill the dead corners between the slag-breaking rods, form a more comprehensive squeezing effect on the slag material, and further improve the crushing effect and the fineness and uniformity of the slag material.

[0024] 5. Due to the fragility of lignite and the small particle size of the resulting coke, the slag layer on the surface of the grate body is in a mixed state, making it difficult to form a stable and uniform slag layer. The grate body consists of multiple grate plates arranged sequentially from top to bottom. Multiple arc-shaped ash-pushing ribs are installed on the grate plates in a circular array. When the grate plates rotate, the arc-shaped ash-pushing ribs push the slag material to the edge sequentially. Combined with the rotation of the slag-breaking component, the effect of slag material crushing can be further improved, preventing blockage during discharge. The circular array arrangement and rotational pushing action of the aforementioned arc-shaped ash-pushing ribs can guide the mixed slag material on the surface of the grate plate to the edge in an orderly manner, forming a synergistic mechanism of pushing, crushing, and re-pushing with the slag-breaking component. This promotes the formation of a relatively stable slag layer distribution, fundamentally improving the problem of poor slag discharge caused by the small particle size and strong adhesion of lignite coke. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a gasifier grate suitable for lignite proposed in this invention;

[0026] Figure 2 This is a top view of a gasifier grate suitable for lignite proposed in this invention;

[0027] Figure 3 This is a schematic diagram of the mating structure between the slag breaking component and the V-shaped part in this invention;

[0028] Figure 4 This is a schematic diagram of the mating structure between the slag-breaking rod and the piercing component in this invention;

[0029] Figure 5 This is a schematic diagram of the puncture component in this invention;

[0030] Figure 6 This is a schematic diagram of the structure of the sphere in this invention;

[0031] Figure 7 This is a schematic diagram of the conical head in this invention.

[0032] Reference numerals: 1. Main body of grate; 11. Grate plate; 12. Arc-shaped ash-pushing rib; 2. Slag-breaking assembly; 21. Slag-breaking plate; 211. Slag-breaking protrusion; 22. Elastic steel cable; 3. V-shaped part; 31. Slag-breaking rod; 4. Piercing part; 41. Loading rod; 411. Torsion spring; 412. Screw; 42. Piercing part; 421. Disc; 422. Spike head; 43. Extrusion part; 431. Sphere; 432. Conical head. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0034] like Figure 1-7 As shown, the present invention proposes a gasifier grate suitable for lignite, comprising a grate body 1;

[0035] The grate body 1 includes multiple grate plates 11 arranged sequentially from top to bottom. The diameter of the multiple grate plates 11 increases sequentially from top to bottom. The bottom grate plate 11 is equipped with a slag crushing component 2 for crushing slag.

[0036] The slag breaking assembly 2 includes slag breaking plates 21. Multiple circumferentially arranged slag breaking plates 21 are installed on the bottom grate plate 11, and a dividing part is connected between adjacent slag breaking plates 21.

[0037] When the grate body 1 rotates, it drives the slag breaking plate 21 to crush the blocky slag material, and the slag material is divided by the dividing part between adjacent slag breaking plates 21.

[0038] When the grate body 1 rotates, it drives the multi-layered grate plates 11 with increasing diameters to rotate synchronously. The slag produced by lignite gasification falls from top to bottom onto the grate plates 11 and moves towards the edge. The multiple slag-breaking plates 21 on the bottom grate plate 11 rotate synchronously. The blocky slag formed after lignite combustion comes into contact with the slag-breaking plates 21 during rotation and is broken by the impact and compression of the slag-breaking plates 21. At the same time, the dividing part between adjacent slag-breaking plates 21 further divides the slag, so that large pieces of slag are divided into smaller pieces, reducing the size and adhesion of the slag, effectively alleviating the problem of blockage and accumulation in the edge area of ​​the grate body 1, and improving the smoothness of slag discharge.

[0039] In this embodiment, the dividing part includes elastic steel cables 22, and two elastic steel cables 22 are connected between adjacent slag breaking plates 21.

[0040] When the grate body 1 rotates, the slag breaking plate 21 and the elastic steel cable 22 rotate synchronously. During the rotation, the blocky slag comes into contact with the elastic steel cable 22 and is further crushed into smaller pieces by the squeezing and dividing action of the elastic steel cable 22. The elastic properties of the elastic steel cable 22 enable it to adapt to slag of different sizes and improve the crushing effect. At the same time, the rotation of the elastic steel cable 22 can also drive the slag to move on the surface of the grate, promoting the uniform distribution and crushing of the slag.

[0041] It should be noted that the two elastic steel cables 22 between adjacent slag breaking plates 21 form two layers of circles, and the adjacent ends of the elastic steel cables 22 of the upper and lower layers of circles pass through the corresponding slag breaking plates 21 and are connected to each other.

[0042] In this embodiment, the top of the slag breaking plate 21 is provided with multiple arc-shaped openings, and slag breaking protrusions 211 are formed between the multiple arc-shaped openings;

[0043] The slag-breaking protrusions 211 on the top of the slag-breaking plate 21 impact the blocky slag material during rotation. Due to the presence of the slag-breaking protrusions 211, the contact area and crushing force between the slag-breaking plate 21 and the slag material are increased, making the slag material easier to crush.

[0044] In this embodiment, a plurality of V-shaped sections 3 for assisting in dividing the slag are installed between the two elastic steel cables 22, and the V-shaped sections 3 are used to cooperate with the elastic steel cables 22 to compress the slag.

[0045] For some large pieces of slag, the crushing plate 21 and the elastic steel cable 22 can work together to crush them. However, for some small pieces of slag, the crushing effect of the crushing plate 21 and the elastic steel cable 22 is not good. Therefore, multiple V-shaped sections 3 are installed between the two elastic steel cables 22 at intervals, as follows:

[0046] When the grate body 1 rotates, the V-shaped section 3 rotates synchronously with the elastic steel cable 22. For some small pieces of slag, the V-shaped section 3 crushes the slag through its V-shaped structure, further refining the small pieces of slag. At the same time, the V-shaped section 3 can also assist the slag breaking plate 21 and the elastic steel cable 22 in crushing large pieces of slag into smaller pieces, expanding the crushing particle size coverage range, so that the mixed particle size slag can be effectively processed, further reducing the risk of slag discharge channel blockage.

[0047] In this embodiment, the V-shaped part 3 includes two slag-breaking rods 31, which form a V-shaped structure. The adjacent ends are hinged to each other, and the ends of the two slag-breaking rods 31 that are far apart are respectively hinged to two elastic steel cables 22. Both slag-breaking rods 31 are equipped with piercing parts 4, and the piercing parts 4 extend between the two slag-breaking rods 31.

[0048] When the grate body 1 rotates, the two slag-breaking rods 31 of the V-shaped section 3 rotate synchronously with the elastic steel cable 22. During the rotation, the piercing parts 4 on the slag-breaking rods 31 pierce the blocky slag material, causing cracks inside the slag material, which facilitates subsequent crushing. At the same time, since the slag-breaking rods 31 form a V-shaped structure, the included angle between the two slag-breaking rods 31 will change as the grate rotates, squeezing and crushing the slag material located in it, further improving the crushing effect.

[0049] In this embodiment, the puncturing component 4 includes a loading rod 41. Multiple loading rods 41 are rotatably connected to two slag-breaking rods 31 and are arranged at intervals. The loading rods 41 extend between the two slag-breaking rods 31. A puncturing part 42 is installed at the top of the loading rod 41. A torsion spring 411 is sleeved on the loading rod 41, and the two ends of the torsion spring 411 are respectively connected to the slag-breaking rod 31 and the puncturing part 42. A threaded groove is opened at the bottom of the loading rod 41, and a screw 412 is threadedly connected in the threaded groove. A pressing part 43 is installed at the bottom of the screw 412.

[0050] Because the lumpy slag is relatively compact, crushing it solely through the V-shaped section 3 during rotation can easily result in hard impacts. Therefore, a piercing element 4 is installed on the slag-breaking rod 31, as detailed below:

[0051] When the piercing part 4 rotates with the slag-breaking rod 31, the piercing part 42 first contacts and pierces the blocky slag. When encountering harder slag, the piercing part 42 deflects under the action of the torsion spring 411, and uses the kinetic energy during recovery to generate an impact piercing action, effectively overcoming the difficulty of crushing hard slag. At the same time, the extrusion part 43 extrudes and crushes the slag during rotation, reducing the dead angle of the slag-breaking rod 31 extruding and crushing the blocky slag, and improving the crushing effect and the fineness and uniformity of the slag.

[0052] In this embodiment, the piercing part 42 includes a disc 421, the top end of the loading rod 41 is mounted with the disc 421, and one end of the torsion spring 411 is connected to the disc 421. A plurality of circumferentially arranged spikes 422 are mounted on the disc 421.

[0053] During the rotation of the disc 421 and spike 422 of the piercing part 42, they come into contact with the blocky slag. The spike 422 first pierces into the interior of the slag, playing a pre-crushing role. When encountering harder slag, the disc 421 deflects under the action of the torsion spring 411, driving the spike 422 to perform an impact piercing action, enhancing the crushing effect.

[0054] In this embodiment, the extrusion part 43 is a sphere 431, which is installed at the bottom end of the screw 412;

[0055] When the grate body 1 drives the V-shaped part 3 on the elastic steel cable 22 to rotate, the two slag-breaking rods 31 in the V-shaped part 3 approach each other and squeeze the slag material. The slag material can be squeezed and crushed by the ball 431 installed at the bottom of the screw 412, reducing the dead corners of the two slag-breaking rods 31 squeezing and crushing the blocky slag material. The above design can fill the dead corners between the slag-breaking rods 31, form a more comprehensive squeezing effect on the slag material, and further improve the crushing effect and the fineness and uniformity of the slag material.

[0056] It should be noted that by rotating the screw 412 on the ball 431, the distance between the ball 431 and the loading rod 41 can be adjusted, thereby achieving the distance between the two balls 431 and further reducing the dead angle of the extruded slag.

[0057] In this embodiment, the extrusion part 43 is a conical head 432, which is installed at the bottom end of the screw 412;

[0058] When the two slag-breaking rods 31 in the V-shaped section 3 approach each other and squeeze the slag, the conical head 432 at the bottom of the screw 412 can preferentially penetrate the slag and gradually squeeze and crush it inward, thereby improving the ability to penetrate and crush dense and hard slag and enhancing the crushing effect in dead corners.

[0059] It should be noted that when the grate body 1 rotates, the conical head 432 will also rotate, and can also impact and crush the slag.

[0060] In this embodiment, a plurality of arc-shaped ash-pushing ribs 12 arranged in a circular array are installed on the grate plate 11.

[0061] When the grate plate 11 rotates, the arc-shaped ash-pushing ribs 12 on it rotate accordingly, pushing the slag on the surface of the grate plate 11 to the edge area in sequence. The ring array arrangement of the arc-shaped ash-pushing ribs 12 and the rotating pushing action can guide the mixed slag on the surface of the grate plate 11 to the edge area in an orderly manner, forming a synergistic mechanism of pushing, crushing and pushing again with the slag breaking component 2, promoting the formation of a relatively stable slag layer distribution state, and fundamentally improving the problem of poor slag discharge caused by the small particle size and strong adhesion of lignite coke.

[0062] The specific working principle of this invention is as follows:

[0063] The grate body 1 is composed of multiple grate plates 11 arranged sequentially from top to bottom. The diameter of the multiple grate plates 11 increases sequentially from top to bottom. When the grate body 1 rotates, the slag produced by lignite gasification falls onto the grate plates 11. The arc-shaped ash-pushing ribs 12 in a ring array on the grate plates 11 rotate with the grate plates 11, continuously pushing the slag towards its edge, so that the slag moves evenly to the slag breaking component 2 area of ​​the lowest grate plate 11.

[0064] The slag breaking plate 21 of the slag breaking assembly 2 rotates circumferentially with the bottom grate plate 11. The slag breaking plate 21 impacts and crushes the blocky slag material, and the elastic steel cable 22 between adjacent slag breaking plates 21 further divides and crushes the slag material.

[0065] The V-shaped section 3 between the elastic steel cables 22 moves with the elastic steel cables 22. The angle between the two slag-breaking rods 31 of the V-shaped section 3 changes dynamically during rotation, and the small pieces of slag are crushed by opening and closing compression, making up for the crushing blind area between the elastic steel cables 22 and the slag-breaking plate 21.

[0066] The piercing part 4 on the slag breaking rod 31 moves synchronously with the slag breaking rod 31. The disc 421 of the piercing part 4 drives the spike head 422. Under the energy storage and rebound action of the torsion spring 411, it impacts and pierces the hard and dense slag material. The extrusion part 43 at the bottom of the loading rod 41 performs point extrusion crushing on the dead corner of the slag material between the slag breaking rods 31 along with the loading rod 41, eliminating the crushing blind zone.

[0067] After being crushed by the slag-breaking plate 21, elastic steel cable 22, V-shaped section 3, and piercing component 4, the lignite slag is broken into uniform small pieces and smoothly discharged from the grate under the continuous pushing of the arc-shaped ash-pushing rib 12. This fundamentally solves the problems of easy sintering, blockage, and poor slag discharge of lignite gasification slag, ensuring the continuous and stable operation of the gasifier.

[0068] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A gasifier grate suitable for lignite, characterized in that, Includes the grate body (1); The grate body (1) includes multiple grate plates (11) arranged sequentially from top to bottom. The diameter of the multiple grate plates (11) increases sequentially from top to bottom. The lowest grate plate (11) is equipped with a slag-breaking component (2) for crushing slag. The slag breaking assembly (2) includes slag breaking plates (21). Multiple circumferentially arranged slag breaking plates (21) are installed on the bottom grate plate (11), and a dividing part is connected between adjacent slag breaking plates (21). When the grate body (1) rotates, it drives the slag breaking plate (21) to break the blocky slag material, and the slag material is divided by the dividing part between adjacent slag breaking plates (21).

2. The gasifier grate for lignite gasification according to claim 1, characterized in that, The segmentation section includes elastic steel cables (22), and two elastic steel cables (22) are connected between adjacent slag breaking plates (21).

3. A gasifier grate suitable for lignite according to claim 1, characterized in that, The top of the slag breaking plate (21) is provided with multiple arc-shaped openings, and slag breaking protrusions (211) are formed between the multiple arc-shaped openings.

4. A gasifier grate suitable for lignite according to claim 2, characterized in that, Multiple V-shaped sections (3) for assisting in dividing the slag are installed between the two elastic steel cables (22), and the V-shaped sections (3) are used to cooperate with the elastic steel cables (22) to squeeze the slag.

5. A gasifier grate suitable for lignite according to claim 4, characterized in that, The V-shaped part (3) includes two slag-breaking rods (31), which form a V-shaped structure. The adjacent ends are hinged to each other, and the ends of the two slag-breaking rods (31) that are far apart are respectively hinged to two elastic steel cables (22). Both slag-breaking rods (31) are equipped with piercing parts (4), and the piercing parts (4) extend between the two slag-breaking rods (31).

6. A gasifier grate suitable for lignite according to claim 5, characterized in that, The puncturing component (4) includes a loading rod (41), on which multiple loading rods (41) are rotatably connected, and the loading rod (41) extends between the two slag-breaking rods (31). A puncturing part (42) is installed at the top of the loading rod (41). A torsion spring (411) is sleeved on the loading rod (41), and the two ends of the torsion spring (411) are respectively connected to the slag-breaking rod (31) and the puncturing part (42). A threaded groove is opened at the bottom of the loading rod (41), and a screw (412) is threadedly connected in the threaded groove. A pressing part (43) is installed at the bottom of the screw (412).

7. A gasifier grate suitable for lignite according to claim 6, characterized in that, The piercing part (42) includes a disc (421), the top of the loading rod (41) is mounted with the disc (421), and one end of the torsion spring (411) is connected to the disc (421). The disc (421) is equipped with a plurality of circumferentially arranged spikes (422).

8. A gasifier grate suitable for lignite according to claim 6, characterized in that, The extrusion part (43) is a sphere (431), which is installed at the bottom end of the screw (412).

9. A gasifier grate suitable for lignite according to claim 6, characterized in that, The extrusion section (43) is a conical head (432), which is installed at the bottom end of the screw (412).

10. A gasifier grate suitable for lignite according to claim 1, characterized in that, The grate (11) is equipped with multiple arc-shaped ash-pushing ribs (12) arranged in a ring array.

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