CN211739089U

CN211739089U - Multi-edge and multi-tooth composite movable fire grate segment

Info

Publication number: CN211739089U
Application number: CN201922245253.6U
Authority: CN
Inventors: 郭大江; 甘伟; 林顺洪; 柏继松; 杨宇; 周绪萍; 杨鲁
Original assignee: Chongqing University of Science and Technology
Current assignee: Chongqing University of Science and Technology
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-10-23
Anticipated expiration: 2029-12-13

Abstract

The utility model belongs to the technical field of refuse handling installation, a multiple tooth compound movable grate segment of multiple sword is provided, the power distribution box comprises a box body, the pay-off slide, the side shield, the material sword is pressed to the side direction, main broken sword and vice broken sword, the one end opening of box, the slope of pay-off slide sets up the opening part at the box, the side shield is located the both sides of pay-off slide, the one end and the pay-off slide and/or the box of side shield are connected, the material sword setting is pressed in the side direction in the side shield towards one side of pay-off slide, main broken sword and vice broken sword set up on the pay-off slide in turn in proper order, and be close to the side direction and press. The utility model provides a pair of multiple tooth compound movable grate segment of multiple sword cuts, stirs, breaks up the effect of rubbish better at the in-process of refuse handling, and the air permeability is also better, therefore refuse treatment efficiency is higher.

Description

Multi-edge and multi-tooth composite movable fire grate segment

Technical Field

The utility model belongs to the technical field of refuse handling installation, concretely relates to multiple tooth compound movable grate segment of multiple sword.

Background

The important part of the waste incinerator is a grate system, and the most basic unit forming the grate system is a grate segment, and the difference of the grate segment directly influences the structure and the performance of the grate system. The incinerator grate system is responsible for conveying garbage in the incinerator, and meanwhile, the mixing degree and the disturbance degree of the garbage and air are improved, and the incineration efficiency is improved.

The existing common fire grate system is a forward-push type reciprocating fire grate system and a backward-push type reciprocating fire grate system, a plurality of incineration sections are obliquely arranged, and the step type arrangement is adopted, so that garbage can be pushed forwards on the fire grate by means of self weight and reciprocating motion of a fire grate unit to complete a combustion process, and the garbage can roll in the falling process of different incineration sections, so that burnt components and insufficiently burnt components are mixed. But when needs promote the msw incineration volume, need increase the thickness of piling up of rubbish, can have rubbish this moment for the complete combustion, can only provide more required hot air of burning, slow down the speed of marcing of grate simultaneously, but this also reduces combustion efficiency to a certain extent, can't solve the problem that combustion efficiency is not high effectively.

The utility model discloses a utility model patent of grant publication No. CN206320763U discloses a grate drive arrangement and burns burning furnace, and this burning furnace has adopted a brand-new grate system, and its grate unit is reciprocating motion from top to bottom under drive arrangement's drive, and the motion trail of the grate unit of interval in proper order is finally wavy. The incinerator realizes the uniform distribution of the area and the thickness of the fire grate, and can roll and mix the burnt garbage and the unburned garbage up and down in time in the propelling process, thereby further improving the preheating and drying effects of the unburned garbage, providing good conditions for complete combustion, not specially increasing the supply of hot air required by combustion, not reducing the traveling speed of the fire grate and further improving the combustion efficiency.

However, the grate unit of the incinerator has only good effects of rolling and mixing the garbage and no cutting effect on the garbage, so that the incinerator has relatively low garbage treatment efficiency.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model aims at providing a multiple tooth compound movable fire grate segment of multiple sword to improve the cutting effect and the good air permeability of fire grate segment to rubbish at the in-process that impels rubbish, and then improve refuse treatment's efficiency.

In order to achieve the above object, the utility model provides a multiple tooth compound movable fire grate segment of multiple sword, include: the air supply device comprises a box body, a driving mechanism and a water outlet, wherein the box body is provided with a hollow inner cavity, one end of the box body is provided with an opening, the other end of the box body is provided with an air supply hole, a connecting part and a water drain hole, an air outlet of the air supply hole is communicated with the inner cavity, the connecting part is connected with the driving mechanism, and a water inlet of the water drain hole is communicated with;

the feeding sliding plate is obliquely arranged at the opening of the box body, the included angle between the feeding sliding plate and the panel of the box body, which is provided with the air supply holes, is a, the included angle a is 30-60 degrees, a first through hole and a first cutting edge are arranged on the feeding sliding plate, the first through hole is communicated with the inner cavity, and the first cutting edge is positioned at the highest position of the feeding sliding plate;

the side baffles are positioned on two sides of the feeding sliding plate, and one ends of the side baffles are connected with the feeding sliding plate and/or the box body;

the lateral pressing blade is arranged on one side of the side baffle plate facing the feeding sliding plate, the included angle between the lateral pressing blade and the feeding sliding plate is b, and the included angle b is 8-15 degrees; and

the main crushing blade and the auxiliary crushing blade are alternately arranged on the feeding sliding plate in sequence and are auxiliary crushing blades close to the lateral pressing blades.

Furthermore, the first through hole becomes smaller from the air inlet to the air outlet of the first through hole.

Furthermore, the other end of the feeding sliding plate is provided with a second through hole, the second through hole is located at the lowest position of the feeding sliding plate and communicated with the inner cavity, and the second through hole extends from one side of the feeding sliding plate to the other side.

Furthermore, the second through hole becomes smaller from the air inlet to the air outlet of the second through hole.

Further, the lateral swaging edge comprises a main cutting edge and an auxiliary cutting edge which are connected with each other, the main cutting edge is located on one side, facing the first cutting edge, of the lateral swaging edge, the auxiliary cutting edge is located on one side, facing away from the first cutting edge, of the lateral swaging edge, included angles between the cutting edges of the main cutting edge and the auxiliary cutting edge and the side baffle are c and d respectively, the included angle c is 25-40 degrees, the included angle d is 50-65 degrees, included angles between the cutting edges of the main cutting edge and the auxiliary cutting edge are both e, and the included angle e is 30-60 degrees.

Furthermore, the included angles between the cutting edges of the main crushing blade and the auxiliary crushing blade and the feeding sliding plate are respectively f and f ', the included angles f and f' are 12-20 degrees, the included angle between the cutting edges of the main crushing blade and the auxiliary crushing blade is g, and the included angle g is 45-60 degrees.

Furthermore, the periphery of the box body is embedded with wear-resistant metal or coated with a wear-resistant coating.

Furthermore, an air gathering plate is arranged in the inner cavity and connected with the feeding sliding plate, and the air gathering plate is obliquely arranged from the air supply hole to the second through hole.

Further, a first sawtooth structure is arranged on the main cutting edge of the lateral pressing edge, an included angle h between a single sawtooth in the first sawtooth structure and the cutting edge of the main cutting edge is 25-35 degrees.

Further, a second sawtooth structure and a third sawtooth structure are arranged on the cutting edge of the main crushing blade, the second sawtooth structure is located on one side, facing the first cutting blade, of the main crushing blade, the third sawtooth structure is located on one side, back to the first cutting blade, of the main crushing blade, an included angle between sawteeth in the second sawtooth structure and the cutting edge of the main crushing blade is i, the included angle i is 12-18 degrees, an included angle between sawteeth in the third sawtooth structure and the side wall of the box body is j, and the included angle j is 50-60 degrees.

The utility model has the advantages that:

1. the utility model provides a pair of multiple tooth compound movable grate segment of multiple sword pushes up material sword through setting up first cutting sword, main broken sword, vice broken sword and side direction of pushing up to improve cutting, stirring, the effect of breaing up to rubbish, and then improve refuse treatment efficiency.

2. Good ventilation of rubbish is ensured through setting up air feed hole and first through-hole, and then improves refuse treatment efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a perspective view of a multi-blade multi-tooth composite movable fire grate segment according to an embodiment of the present invention;

FIG. 2 is a front view of a multi-edged multi-tooth composite movable fire grate segment shown in FIG. 1;

FIG. 3 is a top view of a multi-edged multi-tooth composite movable fire grate segment shown in FIG. 1;

FIG. 4 is a sectional view taken along the direction A-A of the multi-blade multi-tooth composite movable fire grate segment shown in FIG. 2;

FIG. 5 is a cross-sectional view at B of a multi-edged multi-tooth composite movable fire grate segment shown in FIG. 2;

FIG. 6 is a cross-sectional view of the multi-blade multi-tooth composite movable fire grate segment shown in FIG. 2 at the position C

FIG. 7 is a sectional view of the multi-blade multi-tooth composite movable fire grate segment shown in FIG. 2 in the direction D-D;

FIG. 8 is an enlarged view of the multi-edged multi-tooth composite movable fire grate segment shown in FIG. 7 at E;

FIG. 9 is a cross-sectional view of the primary cutting edge and the secondary cutting edge of a multiple-edged, multiple-teeth composite movable grate segment shown in FIG. 1;

fig. 10 is a sectional view of the main crushing blade and the sub-crushing blade of the multi-blade multi-tooth composite movable grate segment shown in fig. 1.

Reference numerals:

1-box body, 11-inner cavity, 12-air supply hole, 13-connecting part, 14-drain hole, 2-feeding sliding plate, 21-first through hole, 22-first cutting edge, 23-second through hole, 3-side baffle, 4-side pressing edge, 41-main cutting edge, 411-first sawtooth structure, 42-auxiliary cutting edge, 5-main crushing edge, 52-second sawtooth structure, 53-third sawtooth structure, 6-auxiliary crushing edge, 71-wear-resistant metal, 72-wear-resistant coating and 8-wind gathering plate.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience of description and simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 to 10, the present invention provides a multi-blade multi-tooth composite movable fire grate segment, which is suitable for a fire grate system moving up and down in a reciprocating manner, such as a fire grate driving device and an incinerator disclosed in the related art with the publication number CN 206320763U.

As shown in fig. 1, in an embodiment provided by the present invention, the multi-blade multi-tooth composite movable fire grate segment includes a box body 1, a feeding sliding plate 2, a side baffle 3, a lateral pressing blade 4, a main crushing blade 4 and an auxiliary crushing blade 6.

The box body 1 is provided with a hollow inner cavity 11, and the upper end and the lower end of the box body 1 are provided with an air supply hole 12, a connecting part 13 and a water drain hole 14. An air outlet of the air supply hole 12 is communicated with the inner cavity 11, an air inlet is communicated with an air supply system (not shown in the figure), and the air supply hole 12 is used for supplying air into the box body 1. The connecting portion 13 is connected with a driving mechanism (not shown in the figures), the connecting portion 13 can be a connecting lug plate, and the driving mechanism drives the box body 1 to do reciprocating linear motion under the driving of a power device (not shown in the figures). The water inlet of the drain hole 14 is in communication with the inner cavity and the water outlet is in communication with a drainage system (not shown in the figures). The water flowing into the tank 1 flows into the drainage system through the drainage hole 14 and is drained. In addition, a filtering device (not shown in the drawings) is installed in the drain hole 14 for filtering moisture generated during the reaction of the garbage and other materials so as to prevent the garbage and other particulate matters from entering the drainage system.

In addition, it is preferable that the air outlet of the air supply hole 12 is higher than the water inlet of the water discharge hole 14 so as to prevent water from flowing into the air supply system from the air supply hole 12.

The feeding sliding plate 2 is obliquely arranged at the opening of the box body 1 and covers the whole opening, when the panel of the box body 1, which is provided with the air supply holes 12, is horizontally placed, the included angle between the feeding sliding plate 2 and the panel of the box body 1, which is provided with the air supply holes 12, is a, the included angle a is 30-60 degrees, so that garbage can be ensured to fall on the feeding sliding plate 2 by utilizing the gravity of the garbage, and the purpose of conveying the garbage from one end of the feeding sliding plate 2 to the other end is achieved. Preferably, the included angle a is 45 degrees, so that the garbage on the material plate is neither conveyed too fast because of too large an inclination angle nor conveyed too slow because of too small an inclination angle. The feeding sliding plate 2 is provided with a first through hole 21 and a first cutting edge 22, and the first through hole 21 is communicated with the inner cavity 11. The first through holes 21 are used for supplying air to the garbage on the feeding sliding plate 2, so that the ventilation of the garbage is ensured, and the reaction efficiency is enhanced. At the same time, the excess moisture in the garbage can also flow into the case 1 from the first through hole 21 and then be discharged through the drainage system. The first cutting edge 22 is located at an end of the feed shoe 2 remote from the air supply hole 12, i.e. at the highest position of the feed shoe 2. The first cutting edge 22 is used to cut the waste passing over its cutting edge to facilitate a thorough reaction of the waste.

The side baffle 3 is used for preventing the materials from sliding into the sealing gaps at the two sides and is positioned at the two sides of the feeding sliding plate 2, one end of the side baffle 3 is connected with the feeding sliding plate 2 and/or the box body 1, the connecting part of the side baffle 3 and the feeding sliding plate 2 and/or the box body 1 is sealed, and therefore the garbage can not pass through the gaps at the connecting part.

The lateral pressing blade 4 is used for pressing and cutting materials, is arranged on one side of the side baffle 3 facing the feeding sliding plate 2, and has an included angle b with the feeding sliding plate 2, wherein the included angle b is 8-15 degrees, so that when garbage passes through the feeding sliding plate 2, the garbage is pressed by moving towards the feeding sliding plate 2. Preferably, the included angle b is equal to 10 ° so as to ensure the passage of the waste while the waste is treated.

The main crushing blade 4 and the auxiliary crushing blade 6 are used for cutting garbage passing through the feeding sliding plate 2, and the height of the main crushing blade 4 is larger than that of the auxiliary crushing blade 6 and is matched with the height of the main crushing blade so as to facilitate better cutting. The main crushing blade 4 and the auxiliary crushing blade 6 are alternately arranged on the feeding sliding plate 2 in sequence, and the structure is favorable for cutting garbage. And an auxiliary crushing blade 6 is arranged close to the lateral pressing blade 4, so that the lateral pressing blade 4 can compress garbage.

In one embodiment, the first through hole 21 becomes smaller from the air inlet to the air outlet, i.e. the air inlet of the first through hole 21 is larger and the air outlet is smaller. The structure increases the pressure of the airflow flowing out of the air outlet by reducing the air outlet of the first through hole 21, so as to prevent the material from falling through the hole.

In one embodiment, the other end of the feeding sliding plate 2 is provided with a second through hole 23, and the second through hole 23 is located at one end of the feeding sliding plate 2 close to the air supply hole 12 and is communicated with the inner cavity 11, i.e. the lowest position of the feeding sliding plate 2. The wind from the wind supply hole 12 forms a protective wind layer at the joint between the garbage and the fire grate segment through the second through hole 23, so that the garbage is prevented from sliding into the joint between the fire grate segment, and the sealing effect is not affected. The second through hole 23 is a strip-shaped hole, extends from one side of the feeding sliding plate 2 to the other side, and almost penetrates through the material self-sliding surface of the whole feeding sliding plate 2. In this way, a protective air layer can be formed at the whole joint to prevent garbage from sliding into the joint between the grate segments to the maximum. The moisture in the garbage may flow into the housing 1 through the second through-hole 23 and then enter the drainage system through the drainage hole 14 to be discharged.

In one embodiment, the second through-hole 23 becomes smaller from its inlet to its outlet. This structure is through reducing the air outlet of second through-hole 23 to the wind pressure of the air outlet of increase second through-hole 23 prevents better that the material from sliding in the downward contact gap.

In one embodiment, the lateral swaging edge 4 includes a main cutting edge 41 and a secondary cutting edge 42 connected to each other, the main cutting edge 41 is located on a side of the lateral swaging edge 4 facing the first cutting edge 22, the secondary cutting edge 42 is located on a side of the lateral swaging edge 4 facing away from the first cutting edge 22, that is, the main cutting edge 41 faces the incoming material direction, the secondary cutting edge 42 faces away from the incoming material direction, included angles between the main cutting edge 41 and the secondary cutting edge 42 and the side fence 3 are c and d, respectively, the included angle c is 25 ° to 40 °, the included angle d is equal to 50 ° to 65 °, and the main cutting edge 42 and the secondary cutting edge 42 are used in cooperation to improve the cutting effect. Preferably, the angle c is equal to 30 degrees and the angle d is equal to 60 degrees, so as to facilitate the lateral pressing edge 4 to cut the waste. The included angles of the cutting edges of the main cutting edge 41 and the auxiliary cutting edge 42 are both e, and the included angle e is 30-60 degrees. The sharpness and the wear resistance of the cutting edge are ensured by controlling the degree of the included angle of the cutting edge.

In one embodiment, the included angles between the cutting edges of the main crushing blade and the auxiliary crushing blade and the feeding sliding plate are respectively f and f ', and the included angles f and f' are 12-20 °. The cutting effect and the flowability of the garbage are ensured by controlling the included angles f and f'. Preferably, the angles f and f' are equal to 15 degrees, so as to guarantee the fluidity of the waste while guaranteeing the cutting angle. The included angle of the cutting edges of the main crushing edge 4 and the auxiliary crushing edge 6 is g, the included angle g is 45-60 degrees, and sharpness and abrasion resistance of the cutting edges are guaranteed by controlling included angle degrees of the cutting edges.

In one embodiment, the periphery of the tank 1 is embedded with a wear resistant metal 71 or coated with a wear resistant coating 72. The wear-resistant metal 71 or the wear-resistant coating 72 is used for improving the wear resistance of the fire grate segment, and further prolonging the service life.

In one embodiment, the air collecting plate 8 is arranged in the inner cavity 11, the air collecting plate 8 is connected with the feeding sliding plate 2, and the air collecting plate 8 is obliquely arranged from the air supply hole 12 to the second through hole 23. The wind passing through the wind collecting plate 8 is collected toward the second through hole 23 along the wind collecting plate 8 by the action of the wind collecting plate 8, so that the wind speed at the second through hole 23 is increased. This structure, gather aerofoil 8 and play the effect of gathering wind and direction, effectively increase the ventilation air current of second through-hole 23, reduce the gliding possibility of material powder toward sealed gap.

In one embodiment, the main cutting edge 41 of the lateral swage edge 4 is provided with a first saw tooth structure 411 to increase the cutting effect of the lateral swage edge 4. The included angle between the sawteeth in the first sawtooth structure 411 and the cutting edge of the main cutting edge 41 is h, and the included angle h is 25-35 degrees. The cutting effect and the garbage circulation are ensured by controlling the included angle h. Preferably, the angle h is 30 ° to ensure a better cutting effect and a better waste circulation

In one embodiment, the cutting edge of the main crushing edge 5 is provided with a second saw tooth structure 51 and a third saw tooth structure 52 to enhance the cutting effect of the main crushing edge 5. The second serration structure 51 is located at a side of the main crushing edge 5 facing the first cutting edge 22, and the third serration structure 52 is located at a side of the main crushing edge 5 facing away from the first cutting edge 22, i.e. the second serration structure 51 faces the incoming material direction, and the third serration structure 52 faces away from the incoming material direction. The included angle between the sawteeth in the second sawtooth structure 51 and the cutting edge of the main crushing blade 5 is i, the included angle i ranges from 12 degrees to 18 degrees, the included angle between the sawteeth in the third sawtooth structure 52 and the side wall of the box body 1 ranges from j, and the included angle j ranges from 50 degrees to 60 degrees.

The working principle of the utility model is as follows:

in use, when the garbage flows on the feeding sliding plate 2, the first cutting edge 22, the main crushing edge 4 and the auxiliary crushing edge 6, and the main cutting edge 41 and the auxiliary cutting edge 42 of the lateral material stirring edge perform cutting, stirring and scattering treatment. Simultaneously, the material sword 4 is pressed to the side direction still will compress tightly the material, changes material physical state to improve crushing efficiency. Meanwhile, the air flow from the air supply system flows into the garbage through the first through hole 21, so that the overall ventilation of the garbage is further ensured, and the reaction is promoted.

In the specification of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. A multi-edge multi-tooth composite movable fire grate segment is characterized by comprising:

the air supply device comprises a box body, a driving mechanism and a water outlet, wherein the box body is provided with a hollow inner cavity, one end of the box body is provided with an opening, the other end of the box body is provided with an air supply hole, a connecting part and a water drain hole, an air outlet of the air supply hole is communicated with the inner cavity, the connecting part is connected with the driving mechanism, and a water inlet of the water drain hole is communicated with;

2. The multiple-tooth multiple-blade composite movable grate segment as claimed in claim 1, wherein the first through holes become smaller from the air inlet to the air outlet thereof.

3. The multi-tooth multi-blade composite movable grate segment as claimed in claim 2, wherein a second through hole is formed at the other end of the feeding sliding plate, the second through hole is located at the lowest position of the feeding sliding plate and is communicated with the inner cavity, and the second through hole extends from one side of the feeding sliding plate to the other side.

4. The multiple-tooth multiple-blade composite movable grate segment as claimed in claim 3, wherein the second through holes become smaller from the air inlet to the air outlet thereof.

5. The multi-tooth composite movable grate segment as claimed in claim 4, wherein the lateral swage edge comprises a main cutting edge and a secondary cutting edge which are connected with each other, the main cutting edge is positioned on one side of the lateral swage edge facing the first cutting edge, the secondary cutting edge is positioned on one side of the lateral swage edge facing away from the first cutting edge, the included angles between the cutting edges of the main cutting edge and the secondary cutting edge and the side baffle are c and d, respectively, the included angle c is 25-40 °, the included angle d is 50-65 °, the included angles between the cutting edges of the main cutting edge and the secondary cutting edge are both e, and the included angle e is 30-60 °.

6. The multi-blade multi-tooth composite movable fire grate segment as claimed in claim 5, wherein the included angles between the cutting edges of the main crushing blade and the secondary crushing blade and the feeding sliding plate are respectively f and f ', the included angles f and f' are 12-20 degrees, the included angles between the cutting edges of the main crushing blade and the secondary crushing blade are g, and the included angle g is 45-60 degrees.

7. The multiple-tooth multiple-blade composite movable fire grate segment as claimed in claim 6, wherein the periphery of the box body is embedded with wear-resistant metal or coated with a wear-resistant coating.

8. The multi-tooth multi-blade composite movable fire grate segment as claimed in claim 7, wherein a wind-gathering plate is arranged in the inner cavity, the wind-gathering plate is connected with the feeding sliding plate, and the wind-gathering plate is arranged obliquely from the wind supply hole to the second through hole.

9. The multi-blade multi-tooth composite movable grate segment according to any one of claims 5 to 8, wherein a first sawtooth structure is arranged on the main cutting edge of the lateral pressing edge, the included angle between the sawtooth in the first sawtooth structure and the cutting edge of the main cutting edge is h, and the included angle h is 25-35 °.

10. The multi-tooth composite movable fire grate segment as claimed in claim 9, wherein a second sawtooth structure and a third sawtooth structure are arranged on the cutting edge of the main crushing edge, the second sawtooth structure is arranged on the side of the main crushing edge facing the first cutting edge, the third sawtooth structure is arranged on the side of the main crushing edge facing away from the first cutting edge, the included angle between the sawtooth in the second sawtooth structure and the cutting edge of the main crushing edge is i, the included angle i is 12-18 °, the included angle between the sawtooth in the third sawtooth structure and the side wall of the box body is j, and the included angle j is 50-60 °.