CN108413407B

CN108413407B - Sawtooth-shaped gear-rubbing fire bar

Info

Publication number: CN108413407B
Application number: CN201810212450.5A
Authority: CN
Inventors: 刘德绍; 林顺洪; 李长江; 徐�明; 柏继松; 杨鲁; 莫榴; 郭大江; 向军
Original assignee: Chongqing University of Science and Technology
Current assignee: Chongqing University of Science and Technology
Priority date: 2018-03-15
Filing date: 2018-03-15
Publication date: 2023-09-22
Anticipated expiration: 2038-03-15
Also published as: CN108413407A

Abstract

The invention discloses a sawtooth-shaped tooth-rubbing fire bar capable of stirring, loosening and scattering garbage. Including the base strip, the upper end of base strip sets up a plurality of sawtooth structures along the ejection of compact direction, the left surface of base strip is located same facade with the left surface of sawtooth structure, the right side of base strip is located same facade with the right side of sawtooth structure, the sawtooth structure is including the high portion that is located the place ahead, is located the inclined part of high portion rear and rear end downward sloping, the preceding terminal surface of high portion is the pushing surface, higher, both sides are lower in the middle of the sawtooth structure, make the both sides of high portion, inclined part all form the side inclined plane, the centre of high portion, inclined part forms the cutting edge, forms the district that gathers materials between the adjacent sawtooth structure, the pushing surface is pushing edge with the intersecting edge that forms of left surface, right side of sawtooth structure, the side inclined plane of inclined part is the pulling edge that forms with the intersecting left surface, right side of sawtooth structure.

Description

Sawtooth-shaped gear-rubbing fire bar

Technical Field

The invention belongs to a pyrolysis incinerator grate of a main part for pyrolysis incineration treatment of solid wastes, and particularly relates to a sawtooth-shaped gear-rubbing grate.

Background

The existing municipal solid waste treatment technology mainly comprises incineration, landfill, composting, waste classification recovery and the like. In the conventional garbage treatment technology, the incineration treatment has the advantages of obvious reduction effect, complete harmless treatment, small occupied area, utilization of waste heat energy, less secondary pollution and the like, and meets the strategic requirements of sustainable development of China.

The most important component of a waste pyrolysis incinerator is the pyrolysis incinerator grate system. The pyrolysis incinerator grate system is mainly responsible for transporting garbage in the thermal reaction tube, improves the mixing and disturbance degree of garbage and air, and achieves scattering through height fall, so that combustion efficiency is improved.

There are many types of incineration grates, particularly reciprocating incineration grates. The grate sheets in the form of reciprocating grate are orderly overlapped like tiles to form a supporting body for pyrolysis combustion of garbage. The movable fire grate segments capable of moving back and forth are alternately arranged with the fixed fire grate segments to generate mutual movement to cause the back and forth movement of garbage. The garbage layer is strongly and continuously turned over and stirred on the reciprocating pushing fire grate plate, so that the garbage layer is repeatedly loosened and rearranged.

At present, chinese garbage has the characteristics of low heat value, high moisture content and the like, and in order to ensure that the outlet temperature of an incinerator is stabilized above 850 ℃, the garbage with high enough content is required to be piled on a fire grate. Therefore, the grate segments are required to be capable of fully turning, agitating and loosening the entire waste material layer in an all-round manner to shorten the drying time and improve the combustion efficiency. Meanwhile, the Chinese household garbage has high water content and complex components, so that the garbage is easy to agglomerate and block during drying and burning. Therefore, the fire grate segments are also required to reduce the possibility of garbage agglomeration and caking, so that garbage in the clusters can be fully contacted with primary air, dried fully and completely combusted, and the burning rate is improved.

Through the development of nearly hundred years, although various traditional structural forms of the fire grate appear, the fire grate is orderly arranged in the transverse direction, and the fire grate is orderly and parallel to move during movement, and the following problems appear in the use process:

1. the head of the single-row fire grate is a neat plane, and the boss or the top surface of the single-row fire grate is a neat plane. In a natural state, the garbage has the same motion state in the transverse direction of the fire grate system, has no relative motion trend, and increases the possibility of garbage agglomeration and caking.

2. When the fire grate moves, the garbage is pushed by a neat plane formed by the heads of the single-row fire grate, so that the garbage in the transverse direction synchronously moves in the longitudinal direction. Therefore, the fire grate sheets only stir and loosen the garbage in the longitudinal direction, the influence on the garbage in the transverse direction is not obvious, and the stirring and loosening effects on the whole garbage layer are not obvious.

3. In addition, as the boss or the top surface of the single-row fire grate is a plane, when the fire grate moves, the garbage does not fall further in the transverse direction, and meanwhile, the fire grate has no extrusion and scattering effects on the garbage in the transverse direction. Therefore, the effect of the fire grate segment on the scattering of the agglomerated garbage is not obvious.

4. The primary air holes formed in the back surfaces of two adjacent fire grate sheets on the same row of fire grate plates are circular, are orderly arranged along the width direction of the primary air holes, and the air outlet direction is orderly parallel air, so that the contact area between the primary air and garbage is reduced, the drying time is prolonged, and the garbage incineration treatment process is slowed down; and the primary air has small disturbance to the flue gas flow field in the hearth.

5. The prior traditional fire grate has more parts and complicated connection mode during installation due to the structure, and fire grate sheets are difficult to install in an experimental device with smaller space, so the fire grate is more suitable for treating large-scale industrial urban garbage.

The prior garbage incinerator is as follows: saw-tooth reciprocating grate bars (CN 201120509663.8), and the problems which are not solved in the grate segments (CN 200720124765.1) capable of loosening garbage by self are solved: the fire bar is more traditional in form and has no obvious effect of crushing and cutting capacity; the parts are more, and the workers are not easy to install.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a serrated tooth-rubbing fire bar capable of stirring, loosening and scattering garbage.

The purpose of the invention is realized in the following way:

the utility model provides a tooth fire bar is rubbed to cockscomb structure, includes the base strip, the upper end of base strip sets up a plurality of sawtooth structures along the ejection of compact direction, the left surface of base strip is located same facade with the left surface of sawtooth structure, the right side of base strip is located same facade with the right side of sawtooth structure, the sawtooth structure is including the high portion that is located the place ahead, is located the inclined part of high portion rear and rear end downward sloping, the preceding terminal surface of high portion is the pushing surface, higher in the middle of the sawtooth structure, both sides are lower, make the both sides of high portion, inclined part all form the side inclined plane, the centre of high portion, inclined part forms the cutting edge, forms the material district between the adjacent sawtooth structure, the edge that the left surface, the right side intersection of pushing surface and sawtooth structure formed is the pushing edge, the edge that the side inclined surface and the left surface, the right side intersection of sawtooth structure formed is the material sword.

Preferably, the cutting edge angle of the high-portion cutting edge is 90 degrees, the cutting edge angle of the inclined-portion cutting edge is 75 degrees, and the material drawing edge and the inclined-portion cutting edge are parallel to each other.

Preferably, the lower parts of the inclined planes at the two sides of the inclined part are respectively provided with a vent hole for connecting with an air source.

Preferably, the vent hole is small at the upper part and large at the lower part, and faces the collecting area, and the cross section of the vent hole is elliptical or rectangular.

Preferably, the fire bar is longitudinally divided into a feeding section, a thermal reaction section and a discharging section, the distribution density of the sawtooth structures of the thermal reaction section is greater than that of the sawtooth structures of the feeding section and the discharging section, and the inclined angle of the inclined cutting edge of the thermal reaction section is greater than that of the inclined cutting edges of the feeding section and the discharging section.

Preferably, a guide groove is formed in one side of the base strip, and a guide boss corresponding to the guide groove is formed in the other side of the base strip.

Preferably, the grate bars are integrally formed from a 310S stainless steel material.

Preferably, the pushing surface is a vertical surface.

Preferably, the middle of the aggregate area is higher and the two sides of the aggregate area are lower, so that a tooth-shaped inclined plane is formed in the middle of the aggregate area.

Preferably, the angle of the tooth-shaped inclined surface is 90 °.

Due to the adoption of the technical scheme, the invention has the following beneficial effects:

1. by adopting the side inclined surface structure, when the adjacent furnace bars do reverse reciprocating motion, the garbage can be effectively transversely stirred and loosened, the garbage can be extruded and scattered, and the scattering effect on the clustered and agglomerated garbage is obvious.

2. The cross section of the vent hole is elliptical or rectangular, the upper part is small, the lower part is large, the arrangement mode is irregular, the contact area with garbage is increased, and the drying time is shortened, so that the garbage incineration treatment process is accelerated; and the disturbance to the flue gas flow field in the hearth is larger.

3. Simple structure, simple to operate.

4. Adjacent bars alternately reciprocate, have relative motion trend, reduce the possibility that rubbish clusters, caking.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic top view of FIG. 1;

FIG. 3 is a schematic view of a saw tooth structure;

FIG. 4 is a schematic cross-sectional view of A-A of FIG. 1;

FIG. 5 is a schematic cross-sectional view of B-B of FIG. 1;

FIG. 6 is a schematic cross-sectional view of C-C of FIG. 1;

FIG. 7 is a schematic cross-sectional view of D-D of FIG. 1;

FIG. 8 is a schematic view of the partial structure at P in FIG. 1;

fig. 9 is a schematic diagram of a partial structure at Q of fig. 1.

Reference numerals

In the drawing, 13 is a vent hole, 15 is a cutting edge, 16 is a collecting area, 18 is a pushing surface, 19 is a side inclined surface, 20 is a pushing edge, 21 is a drawing edge, 22 is a left side surface, 23 is a right side surface, 24 is a guide boss, and 25 is a guide groove.

Detailed Description

Referring to fig. 1-9, a preferred embodiment of a serrated toothed grate bar is provided wherein the grate bar is integrally formed from a 310S stainless steel material. The furnace bar is longitudinally divided into a feeding section, a thermal reaction section and a discharging section, wherein the distribution density of the sawtooth structure of the thermal reaction section is twice that of the sawtooth structure of the feeding section and the discharging section. The left side face of the base strip and the left side face of the sawtooth structure are located on the same vertical face, and the right side face of the base strip and the right side face of the sawtooth structure are located on the same vertical face. One side of the base strip is provided with a guide groove, and the other side of the base strip is provided with a guide boss corresponding to the guide groove.

The sawtooth structure comprises a high part positioned at the front, an inclined part positioned at the rear of the high part and the rear end of the inclined part is inclined downwards, and the front end face of the high part is a pushing surface for pushing materials forwards. The pushing surface is a vertical surface. The sawtooth structure is higher in the middle and lower on two sides, so that side inclined planes are formed on two sides of the high part and the inclined part, and the side inclined planes mainly enable materials piled on the top of the fire bar to slide to the material collecting areas from the left end and the right end of the fire bar, thereby preventing the materials from being piled on the top of the fire bar and being static. The cutting edge is formed in the middle of the high part and the inclined part, and the material can pass through the cutting edge when moving forwards, so that the effect of fully cutting and scattering the material can be achieved. And an aggregate area is formed between adjacent sawtooth structures, edges formed by intersecting the material pushing surface with the left side surface and the right side surface of the sawtooth structures are material pushing edges, and edges formed by intersecting the side inclined surface of the inclined part with the left side surface and the right side surface of the sawtooth structures are material pulling edges. When the fire bar moves forwards and backwards, the material drawing blade can drive part of a small amount of materials to move backwards and be uniformly mixed with new materials.

The cutting edge angle of the high-portion cutting edge is 90 degrees, the cutting edge angle of the inclined-portion cutting edge is 75 degrees, and the material pulling edge and the inclined-portion cutting edge are parallel to each other. The middle of the aggregate area is higher, and the two sides of the aggregate area are lower, so that a tooth-shaped inclined plane is formed in the middle of the aggregate area, and the angle of the tooth-shaped inclined plane is 90 degrees. The oblique angle of the oblique cutting edge of the thermal reaction section is larger than the oblique angles of the oblique cutting edges of the feeding section and the discharging section, and in this embodiment, the oblique angle of the oblique cutting edge of the thermal reaction section is 30 degrees, and the oblique angles of the oblique cutting edges of the feeding section and the discharging section are 12 degrees.

The lower part of both sides inclined plane of inclined part all opens and is used for being connected the air vent with the air supply, the air vent is big-end-down, and towards the district that gathers materials, the air vent can adopt the oval or rectangular column hole of toper. The air source can adopt an external fan, the fan is connected with a vent hole opening at the lower end of the fire bar through a pipeline, gas is introduced into the hearth, the gas is sprayed out from the vent hole, and the gas mainly promotes the full combustion of the material garbage.

The incinerator grate system needs a plurality of parallel grate bars, and the guide boss of each grate bar is inserted into the guide groove of the adjacent grate bar to be in clearance fit, so that each grate bar can reversely reciprocate. The sawtooth structure of the thermal reaction section stirs, loosens and breaks up the material and has the following characteristics: the cutting and crushing effects are better due to the large cutting inclination angle, so that the materials can be fully reacted in the thermal reaction section.

Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a tooth fire bar is rubbed with hands to cockscomb structure which characterized in that: the novel material pushing device comprises a base strip, wherein a plurality of sawtooth structures are arranged at the upper end of the base strip along the discharging direction, the left side surface of the base strip and the left side surface of the sawtooth structures are positioned on the same vertical surface, the right side surface of the base strip and the right side surface of the sawtooth structures are positioned on the same vertical surface, the sawtooth structures comprise a high part positioned in front, an inclined part positioned behind the high part and the rear end of the sawtooth structures is inclined downwards, the front end surface of the high part is a material pushing surface, the middle of the sawtooth structures is higher and the two sides of the sawtooth structures are lower, so that side inclined surfaces are formed on the two sides of the high part and the inclined part, cutting edges are formed between the middle of the high part and the inclined part, an aggregate area is formed between the adjacent sawtooth structures, and edges formed by intersecting the material pushing surface and the left side surface and the right side surface of the inclined part are material pulling edges;

the furnace bar is longitudinally divided into a feeding section, a thermal reaction section and a discharging section, the distribution density of the sawtooth structures of the thermal reaction section is greater than that of the sawtooth structures of the feeding section and the discharging section, and the inclined angle of the inclined cutting edge of the thermal reaction section is greater than that of the inclined cutting edges of the feeding section and the discharging section;

one side of the base strip is provided with a guide groove, and the other side of the base strip is provided with a guide boss corresponding to the guide groove.

2. The serrated tooth bar as claimed in claim 1, wherein: the cutting edge angle of the high-portion cutting edge is 90 degrees, the cutting edge angle of the inclined-portion cutting edge is 75 degrees, and the material pulling edge and the inclined-portion cutting edge are parallel to each other.

3. The serrated tooth bar as claimed in claim 1, wherein: the lower parts of the inclined planes at the two sides of the inclined part are respectively provided with a vent hole for connecting with an air source.

4. A toothed rack according to claim 3, characterized in that: the vent hole is small at the upper part and large at the lower part, faces the collecting area, and the cross section of the vent hole is elliptical or rectangular.

5. The serrated tooth bar as claimed in claim 1, wherein: the whole furnace bar is made of 310S stainless steel materials.

6. The serrated tooth bar as claimed in claim 1, wherein: the pushing surface is a vertical surface.

7. The serrated tooth bar as claimed in claim 1, wherein: the middle of the aggregate area is higher, and the two sides of the aggregate area are lower, so that a tooth-shaped inclined plane is formed in the middle of the aggregate area.

8. The serrated tooth bar as claimed in claim 1, wherein: the angle of the tooth-shaped inclined surface is 90 degrees.