阅读说明：本技术 垃圾焚烧炉排炉 (Waste incineration grate furnace ) 是由 郭天宇 姚心 张瑛华 刘海威 杨培培 于 2019-10-28 设计创作，主要内容包括：本发明公开了一种垃圾焚烧炉排炉,包括焚烧炉排、前拱墙、后拱墙和烟道,其中,焚烧炉排包括均呈前高后低的倾斜状设置且依次由前向后排布的干燥段炉排、燃烧段炉排和燃烬段炉排,干燥段炉排的后端高于燃烧段炉排的前端,燃烧段炉排的后端高于燃烬段炉排的前端；前拱墙位于干燥段炉排的上方且在竖直方向上投影完全覆盖干燥段炉排；后拱墙呈前高后低的倾斜状设置,后拱墙与水平面的夹角为39°～43°,后拱墙位于燃烬段炉排和燃烧段炉排的上方,后拱墙在竖直方向上投影完全覆盖燃烬段炉排以及覆盖燃烧段炉排的1/3至1/2的面积。本发明固废协同处置率高、烟气中污染物排放减少、能源利用效率提高。(The invention discloses a waste incineration grate furnace, which comprises an incineration grate, a front arch wall, a rear arch wall and a flue, wherein the incineration grate comprises a drying section grate, a combustion section grate and a burn-out section grate which are all obliquely arranged in a front-high and rear-low manner and are sequentially arranged from front to back; the front arch wall is positioned above the drying section fire grate and completely covers the drying section fire grate in a vertical projection manner; the rear arch wall is arranged in an inclined shape with a high front part and a low rear part, the included angle between the rear arch wall and the horizontal plane is 39-43 degrees, the rear arch wall is positioned above the burn-out section fire grate and the combustion section fire grate, and the projection of the rear arch wall in the vertical direction completely covers the burn-out section fire grate and the areas 1/3-1/2 of the combustion section fire grate. The invention has high solid waste synergistic treatment rate, reduced pollutant emission in flue gas and improved energy utilization efficiency.)

1. A waste incineration grate furnace, characterized by comprising:

the incinerator grate comprises a drying section grate capable of being independently adjusted and moved, a combustion section grate capable of being independently adjusted and moved and an ember section grate capable of being independently adjusted and moved, the drying section grate, the combustion section grate and the ember section grate are all arranged in an inclined mode with a higher front part and a lower rear part and are sequentially arranged from front to back, the rear end of the drying section grate is higher than the front end of the combustion section grate, and the rear end of the combustion section grate is higher than the front end of the ember section grate; primary air inlets for feeding air from bottom to top are formed in the drying section grate, the combustion section grate and the burn-out section grate;

the front arch wall is positioned above the drying section fire grate and completely covers the drying section fire grate in a vertical projection mode;

the rear arch wall is obliquely arranged with a high front part and a low rear part, the included angle between the rear arch wall and the horizontal plane is 39-43 degrees, the rear arch wall is positioned above the burn-out section fire grate and the combustion section fire grate, one part of the rear arch wall completely covers the burn-out section fire grate in a projection manner in the vertical direction, and the other part of the rear arch wall covers the area 1/3-1/2 of the combustion section fire grate in a projection manner in the vertical direction;

and the flue is vertically arranged and connected between the rear end of the front arch wall and the front end of the rear arch wall.

2. The waste incineration grate furnace of claim 1, wherein a rear end of the rear arch wall is located rearwardly and upwardly of a rear end of the burn-out stage grate.

3. The waste incineration grate furnace of claim 1, wherein a front end of the front arch wall is coincident with a front end of the drying section grate in a vertical projection, and a rear end of the front arch wall is located above and behind a rear end of the drying section grate.

4. The waste incineration grate furnace of claim 3, wherein the front arch wall is inclined or horizontally arranged with a lower front and a higher rear, and the included angle between the front arch wall and the horizontal plane is 0-5 ° or 28-32 °.

5. The waste incineration grate furnace of claim 4, wherein when the front arch wall forms an angle of 28 ° to 32 ° with the horizontal plane, the front end of the rear arch wall is approximately level or flush with the rear end of the front arch wall.

6. The waste incineration grate furnace of claim 4, wherein the front arch wall forms an angle of 0-5 ° with a horizontal plane, and the front end of the rear arch wall is higher than the rear end of the front arch wall.

7. The waste incineration grate furnace of any one of claims 1 to 6, wherein secondary air inlets are provided at the connection of the front arch wall and the flue and at the connection of the rear arch wall and the flue.

8. The waste incineration grate furnace of any one of claims 1 to 6, wherein the drying section grate, the burning section grate and the burn-out section grate each comprise a plurality of moving modules arranged in sequence in the left-right direction, and the moving modules are used for pushing waste on the moving modules to move from a front high position to a rear low position.

9. The waste incineration grate furnace of claim 8, wherein a gap between every two adjacent moving modules forms the primary air inlet.

Technical Field

The invention relates to the technical field of waste incineration treatment, in particular to a waste incineration grate furnace.

Background

The organic solid waste amount is large and wide in range and the components are complex in China, and energy utilization is a core means for harmlessness and reduction. The common problems of low cooperative disposal rate of various solid wastes, difficult ultralow emission of pollutants, low energy utilization efficiency and the like exist in the incineration process.

The combustion reaction and process of the garbage in the incineration hearth are very complex, the drying and dehydration, the combustion reaction and the ash formation of the organic garbage are related, and the interaction of solid phase and gas phase in the hearth is always a research difficulty in the domestic and foreign industries. And because the combustion temperature in the hearth is high, the chemical components are complex, the chemical reaction is complex, and the temperature field, the velocity field and the content of each generated component in the hearth are difficult to be measured visually by using measuring components.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention aims to provide the waste incineration grate furnace which is high in solid waste synergistic treatment rate, reduced in pollutant emission in flue gas and improved in energy utilization efficiency.

The waste incineration grate furnace according to the embodiment of the invention comprises:

the incinerator grate comprises a drying section grate capable of being independently adjusted and moved, a combustion section grate capable of being independently adjusted and moved and an ember section grate capable of being independently adjusted and moved, the drying section grate, the combustion section grate and the ember section grate are all arranged in an inclined mode with a higher front part and a lower rear part and are sequentially arranged from front to back, the rear end of the drying section grate is higher than the front end of the combustion section grate, and the rear end of the combustion section grate is higher than the front end of the ember section grate; primary air inlets for feeding air from bottom to top are formed in the drying section grate, the combustion section grate and the burn-out section grate;

the front arch wall is positioned above the drying section fire grate and completely covers the drying section fire grate in a vertical projection mode;

the rear arch wall is obliquely arranged with a high front part and a low rear part, the included angle between the rear arch wall and the horizontal plane is 39-43 degrees, the rear arch wall is positioned above the burn-out section fire grate and the combustion section fire grate, one part of the rear arch wall completely covers the burn-out section fire grate in a projection manner in the vertical direction, and the other part of the rear arch wall covers the area 1/3-1/2 of the combustion section fire grate in a projection manner in the vertical direction;

and the flue is vertically arranged and connected between the rear end of the front arch wall and the front end of the rear arch wall.

According to the waste incineration grate furnace provided by the embodiment of the invention, as the front arch wall is short and low and covers the drying section grate, the waste is quickly dried at the drying section grate, and the forward movement of a waste combustion point is facilitated; the rear arch wall is high and long, the whole area of the burnout section and the area 1/3-1/2 of the fire grate of the combustion section are covered, the flue gas of the burnout section under the rear arch wall can be guided to the combustion section, the radiant heat exchange and the airflow convection heat exchange of the rear arch wall of the hearth are fully utilized, the blown scorching ash particles and carbon particles can flow back to the surface of the garbage layer, the full combustion of the garbage in the hearth is ensured, a certain ignition effect is achieved, and therefore the garbage can be ensured to be fully combusted in the hearth. In conclusion, the solid waste co-processing method and the device have the advantages of high solid waste co-processing rate, reduction in pollutant emission in the flue gas and improvement in energy utilization efficiency.

According to some embodiments of the invention, a rear end of the rear arch wall is located rearwardly above a rear end of the ember zone grate.

According to some embodiments of the invention, a front end of the front arch wall is vertically projected to coincide with a front end of the drying section grate, and a rear end of the front arch wall is located above and behind a rear end of the drying section grate.

According to a further embodiment of the invention, the front arch wall is arranged in an inclined manner with a lower front part and a higher rear part or is arranged horizontally, and the included angle between the front arch wall and the horizontal plane is 0-5 degrees or 28-32 degrees.

According to a still further embodiment of the present invention, when the front arch wall forms an angle of 28 ° to 32 ° with the horizontal plane, the front end of the rear arch wall is approximately level or flush with the rear end of the front arch wall.

According to a further embodiment of the present invention, an angle between the front arch wall and a horizontal plane is 0 to 5 °, and a front end of the rear arch wall is higher than a rear end of the front arch wall.

According to some embodiments of the invention, secondary air inlets are provided at the connecting position of the front arch wall and the flue and at the connecting position of the rear arch wall and the flue.

According to some embodiments of the invention, the drying section grate, the burning section grate and the ember section grate each comprise a plurality of moving modules arranged in sequence along the left-right direction, and the moving modules are used for pushing the garbage on the moving modules to move from a front high position to a rear low position.

According to a further embodiment of the present invention, a gap between every two adjacent motion modules forms the primary air inlet.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a waste incineration grate furnace according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of a waste incineration grate furnace according to another embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a drying section grate, a combustion section grate or an ember section grate in the embodiment of the invention.

Fig. 4 is a simulation diagram of the experimental simulation of fig. 1.

Fig. 5 is a simulation diagram of the experimental simulation of fig. 2.

Fig. 6 is an experimental simulation diagram of a conventional furnace type.

Reference numerals:

waste incineration grate furnace 1000

Burn-out section grate 103 of dry section grate 101 and burn-out section grate 102 of incineration grate 1

Front arch wall 2

Rear arch wall 3

Flue 4

Primary air inlet 5

Secondary air inlet 6

Motion module 7

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Aiming at the problems of low cooperative disposal rate of various solid wastes, difficult ultralow pollutant discharge, pending improvement of energy utilization efficiency and the like of the existing incinerator structure, the invention provides a novel incinerator type design structure by reasonably adjusting the front arch and the rear arch of a waste incinerator furnace (including angle, length and height) and combining the angle of the incinerator grate and secondary air arrangement, aiming at the characteristic of high water content of domestic wastes in China, so as to meet the requirements of different waste incineration conditions in various regions.

As shown in FIG. 6, the included angle between the front arch wall and the horizontal plane of the existing furnace type structure is 15 degrees, the included angle between the rear arch wall and the horizontal plane is 41 degrees, the furnace type structure is only suitable when the secondary air speed is high, the ignition effect of the furnace type structure is limited, and the requirement of drying and pyrolyzing the high-moisture garbage cannot be met.

As shown in fig. 1 to 3, a waste incineration grate furnace 1000 according to an embodiment of the present invention includes an incineration grate 1, a front arch wall 2, a rear arch wall 3, and a flue 4. The incinerator grate 1 comprises a drying section grate 101 capable of being adjusted and moved independently, a combustion section grate 102 capable of being adjusted and moved independently and an ember section grate 103 capable of being adjusted and moved independently, the drying section grate 101, the combustion section grate 102 and the ember section grate 103 are all arranged in an inclined mode with a higher front part and a lower rear part and are sequentially arranged from front to back, the rear end of the drying section grate 101 is higher than the front end of the combustion section grate 102, and the rear end of the combustion section grate 102 is higher than the front end of the ember section grate 103; primary air inlets 5 for feeding air from bottom to top are arranged on the drying section grate 101, the combustion section grate 102 and the burn-out section grate 103; the front arch wall 2 is positioned above the drying section grate 101 and completely covers the drying section grate 101 in a projection mode in the vertical direction; the rear arch wall 3 is arranged in an inclined shape with a high front part and a low rear part, the included angle between the rear arch wall 3 and the horizontal plane is 39-43 degrees, the rear arch wall 3 is positioned above the burn-out section fire grate 103 and the combustion section fire grate 102, one part of the rear arch wall 3 completely covers the burn-out section fire grate 103 in a projection manner in the vertical direction, and the other part of the rear arch wall 3 covers the area of 1/3-1/2 of the combustion section fire grate 102 in a projection manner in the vertical direction; the flue 4 is vertically arranged and connected between the rear end of the front arch wall 2 and the front end of the rear arch wall 3.

Specifically, the waste incineration grate furnace 1000 of the embodiment of the invention comprises an incineration grate 1, a front arch wall 2, a rear arch wall 3 and a flue 4, wherein the incineration grate 1, the front arch wall 2 and the rear arch wall 3 jointly form a hearth of the waste incineration grate furnace 1000, and the flue 4 is positioned above the hearth and is communicated with the hearth.

The incineration grate 1 comprises a drying section grate 101 capable of independently adjusting and moving, a combustion section grate 102 capable of independently adjusting and moving and an after-burning section grate 103 capable of independently adjusting and moving, wherein the drying section grate 101, the combustion section grate 102 and the after-burning section grate 103 are all arranged in an inclined manner with a higher front part and a lower back part and are sequentially arranged from front to back, the rear end of the drying section grate 101 is higher than the front end of the combustion section grate 102, the rear end of the combustion section grate 102 is higher than the front end of the after-burning section grate 103, thus, through the movement of the drying section grate 101, the movement of the combustion section grate 102 and the movement of the burn-out section grate, the garbage entering from the front end of the drying section grate 101 can be pushed to gradually move from the front end of the drying section grate 101 to the rear end of the burn-out section grate 103, so that the garbage entering the hearth is dried and dehydrated at the drying section grate 101 in sequence, the combustion reaction is carried out at the combustion section grate 102, and then the combustion reaction is carried out at the burn-out section grate 103 to burn out into ash and is discharged from an outlet at the rear end of the drying section grate 101. The drying section grate 101, the combustion section grate 102 and the burn-out section grate 103 are all provided with primary air inlets 5 for feeding air from bottom to top, so that garbage in a hearth can be subjected to combustion reaction.

The front arch wall 2 is positioned above the drying section grate 101 and completely covers the drying section grate 101 in a projection in the vertical direction. It can be understood that the distance of the front arch wall 2 is smaller relative to the drying section grate 101 and shorter relative to the front-back distance of the whole incineration grate 1, and the projection of the front arch wall 2 in the vertical direction completely covers the area of the drying section grate 101, so that the reradiation effect of the front arch wall 2 is enhanced, the retention time of high-temperature flue gas in a hearth can be prolonged, the drying capacity of garbage is enhanced, the drying pyrolysis of high-moisture garbage is facilitated, and the phenomenon that moisture enters the combustion section in a large amount to enable the combustion point to move backwards is avoided.

The rear arch wall 3 is arranged in an inclined shape with a high front part and a low rear part, the included angle between the rear arch wall 3 and the horizontal plane is 39-43 degrees, for example, the included angle between the rear arch wall 3 and the horizontal plane can be 39 degrees, 41 degrees, 43 degrees and the like, the rear arch wall 3 is positioned above the ember section fire grate 103 and the combustion section fire grate 102, a part of the rear arch wall 3 is projected in the vertical direction to completely cover the ember section fire grate 103, and the projection of the rest part of the rear arch wall 3 in the vertical direction covers the area of 1/3-1/2 of the combustion section fire grate 102. It can be understood that the distance between the rear arch wall 3 and the combustion section grate 102 and the distance between the rear arch wall 3 and the combustion section grate 103 are larger, and the distance between the rear arch wall 3 and the whole combustion section grate 1 is longer, and the rear arch wall 3 covers the whole area of the combustion section and the area 1/3 to 1/2 of the combustion section grate 102, so that the flue gas of the combustion section under the rear arch wall 3 can be guided to the combustion section, the radiation heat exchange and the airflow convection heat exchange of the rear arch wall 3 of the hearth can be fully utilized, the blown scorching ash particles and carbon particles can flow back to the surface of the garbage layer, the garbage in the hearth can be fully combusted, and a certain ignition effect can be achieved.

The flue 4 is vertically arranged and connected between the rear end of the front arch wall 2 and the front end of the rear arch wall 3. It is understood that the flue 4 is located above the combustion zone grate 102 to facilitate flue gas discharge.

According to the waste incineration grate furnace 1000 provided by the embodiment of the invention, as the front arch wall 2 is low and short and covers the drying section grate 101, waste is quickly dried at the drying section grate 101, and the forward movement of a waste combustion point is facilitated; the rear arch wall 3 is high and long, covers the whole area of the burnout section and the area 1/3 to 1/2 of the fire grate 102 of the combustion section, can guide the flue gas of the burnout section below the rear arch wall 3 to the combustion section, makes full use of the radiation heat exchange and the airflow convection heat exchange of the rear arch wall 3 of the hearth, and can make the blown scorching ash particles and carbon particles flow back to the surface of the garbage layer, ensures the full combustion of the garbage in the hearth, plays a certain ignition role, and therefore can ensure the full combustion of the garbage in the hearth. In conclusion, the solid waste co-processing method and the device have the advantages of high solid waste co-processing rate, reduction in pollutant emission in the flue gas and improvement in energy utilization efficiency.

According to some embodiments of the invention, the rear end of the rear arch wall 3 is located rearwardly and upwardly of the rear end of the ember zone grate 103. From this, more be favorable to leading the burn-out section flue gas under the wall 3 of encircleing after will to the combustion section, the 3 radiant heat transfer of wall and air current convection heat transfer are encircleed behind make full use of furnace, and can make the scorching heat grits that are blown up and carbon granules backward flow and fall to the rubbish layer surface, guarantee the abundant burning of rubbish in the furnace, play certain effect of igniting

According to some embodiments of the present invention, the front end of the front arch wall 2 is projected in the vertical direction to coincide with the front end of the drying section grate 101, and the rear end of the front arch wall 2 is located at the rear upper part of the rear end of the drying section grate 101. From this, can strengthen preceding arch wall 2's reradiation effect more, can prolong the dwell time of high temperature flue gas in the furnace more, the drying power of the drying zone of drying zone grate 101 department is stronger, is favorable to the dry pyrolysis of high moisture rubbish, avoids moisture to get into the combustion zone in a large number and makes the burning point move backward.

According to a further embodiment of the invention, the front arch wall 2 is arranged in an inclined manner with a low front and a high rear or in a horizontal manner, and the included angle between the front arch wall 2 and the horizontal plane is 0-5 degrees or 28-32 degrees. It can be understood that the included angle between the front arch wall 2 and the horizontal plane can be any one of 0-5 degrees, for example, the included angle between the front arch wall 2 and the horizontal plane is 0, 1 degree, 2 degree, 3 degree, 4 degree, 5 degree, and the like, the included angle range can enable the front arch wall 2 to be horizontally arranged or arranged close to the horizontal state, the distance between the front arch wall 2 and the drying section fire grate 101 can be smaller, especially the distance between the rear part of the front arch wall 2 and the rear part of the drying section fire grate 101 is more obviously reduced, compared with the existing furnace type design, the reradiation effect of the front arch wall 2 is greatly enhanced, the staying time in the high-temperature flue gas furnace hearth is greatly prolonged, the drying capacity of the garbage is greatly enhanced, the structure is very beneficial to the drying and pyrolysis of the high-moisture garbage, and the phenomenon that the combustion point moves backwards due to the fact that a large amount of moisture. The included angle between the front arch wall 2 and the horizontal plane can be any one of 28 degrees to 32 degrees, for example, the included angle between the front arch wall 2 and the horizontal plane is 28 degrees, 29 degrees, 30 degrees, 31 degrees, 32 degrees and the like, the range of the included angle can enable the front arch wall 2 to be arranged in an inclined shape, the distance between the front arch wall 2 and the drying section grate 101 is smaller, so that the reradiation effect of the front arch wall 2 is enhanced, the retention time of high-temperature flue gas in a hearth can be prolonged, the drying capability of garbage is enhanced, the drying pyrolysis of high-moisture garbage is facilitated, and the situation that a large amount of moisture enters the combustion section to enable a combustion point to move backwards is avoided.

According to a further embodiment of the present invention, when the front arch wall 2 forms an angle of 28 ° to 32 ° with the horizontal plane, the front end of the rear arch wall 3 is approximately level or flush with the rear end of the front arch wall 2. Therefore, the garbage can be fully combusted.

According to a further embodiment of the present invention, the front arch wall 2 is higher than the rear arch wall 2 at the front end of the rear arch wall 3 with an angle of 0 to 5 ° with respect to the horizontal plane. Therefore, the garbage can be fully combusted.

As shown in fig. 1 and 2, according to some embodiments of the present invention, a secondary air inlet 6 is provided at a connection portion of the front arch wall 2 and the flue 4 and at a connection portion of the rear arch wall 3 and the flue 4. Therefore, along with the injection of secondary air, the disturbance and mixing of air flow in the furnace are increased, a high-temperature area in a hearth is more concentrated in a combustion section, the combustion reaction of garbage is facilitated, the temperature field at an outlet is uniform, the turbulence degree of a flow field is good, the complete combustion of combustible gas is facilitated, the retention time of flue gas at the temperature of more than 850 ℃ exceeds 2s, the generation of dioxin is reduced, and the generation of thermal NOx is inhibited.

As shown in fig. 3, according to some embodiments of the present invention, each of the drying section grate 101, the burning section grate 102 and the ember section grate 103 includes a plurality of moving modules 7 arranged in sequence in the left-right direction for pushing the garbage on the moving modules 7 to move from the front high position to the rear low position. Thereby, the independent movement of the drying section grate 101, the burning section grate 102 and the ember section grate 103 is realized.

As shown in fig. 3, according to a further embodiment of the present invention, the gap between two adjacent moving modules forms a primary air inlet 5. From this, 5 structural design in the air inlet is simple once, and can make an air inlet distribute comparatively evenly in furnace, be favorable to guaranteeing that rubbish is even abundant burning, improves the efficiency of rubbish burning.

The waste incinerator 1000 of the present invention will be described below with reference to two specific examples.

The specific example is as follows:

as shown in fig. 1, 3 and 4, the waste incineration grate furnace 1000 includes an incineration grate 1, a front arch wall 2, a rear arch wall 3 and a flue 4.

Specifically, the incineration grate 1 comprises a drying section grate 101 capable of being independently adjusted and moved, a combustion section grate 102 capable of being independently adjusted and moved, and an ember section grate 103 capable of being independently adjusted and moved, wherein the drying section grate 101, the combustion section grate 102 and the ember section grate 103 are all arranged in an inclined manner with a higher front part and a lower rear part and are sequentially arranged from front to rear, the rear end of the drying section grate 101 is higher than the front end of the combustion section grate 102, and the rear end of the combustion section grate 102 is higher than the front end of the ember section grate 103; the drying section grate 101, the combustion section grate 102 and the burn-out section grate 103 are all provided with primary air inlets 5 for feeding air from bottom to top.

The front arch wall 2 is located above the drying section grate 101 and completely covers the drying section grate 101 in a projection manner in the vertical direction, specifically, the front end of the front arch wall 2 is projected in the vertical direction to coincide with the front end of the drying section grate 101, the rear end of the front arch wall 2 is located above the rear end of the drying section grate 101, the front arch wall 2 is arranged in an inclined manner that the front arch wall is low in front and the rear is high in rear, and the included angle between the front arch wall 2 and the horizontal plane is 30 degrees.

The rear arch wall 3 is arranged in an inclined shape with a high front part and a low rear part, the included angle between the rear arch wall 3 and the horizontal plane is 41 degrees, the rear arch wall 3 is positioned above the burn-out section fire grate 103 and the combustion section fire grate 102, one part of the rear arch wall 3 completely covers the burn-out section fire grate 103 in a projection manner in the vertical direction, the other part of the rear arch wall 3 covers the 1/2 area of the combustion section fire grate 102 in a projection manner in the vertical direction, the front end of the rear arch wall 3 is basically level with the rear end of the front arch wall 2, and the rear end of the rear arch wall 3 is positioned above and behind the rear end of the burn-out section fire grate 103.

The flue 4 is vertically arranged and connected between the rear end of the front arch wall 2 and the front end of the rear arch wall 3.

The simulation experiment result of the waste incineration grate furnace 1000 of the first specific example is (as shown in fig. 4): it can be seen from figure 4 that compare in current furnace type design, this novel design furnace type will be after hunch burn out section flue gas guide to the combustion zone down, encircle radiation heat transfer and gaseous convection heat transfer behind the make full use of furnace, and can make the scorching heat ash grain that is blown up and carbon granule backward flow fall the garbage layer surface, guarantee the abundant burning of rubbish in the furnace, this kind of novel incinerator structural design has certain effect of igniting.

Specific example two:

as shown in fig. 2, 3 and 5, the waste incineration grate furnace 1000 includes an incineration grate 1, a front arch wall 2, a rear arch wall 3 and a flue 4.

Specifically, the incineration grate 1 comprises a drying section grate 101 capable of being independently adjusted and moved, a combustion section grate 102 capable of being independently adjusted and moved, and an ember section grate 103 capable of being independently adjusted and moved, wherein the drying section grate 101, the combustion section grate 102 and the ember section grate 103 are all arranged in an inclined manner with a higher front part and a lower rear part and are sequentially arranged from front to rear, the rear end of the drying section grate 101 is higher than the front end of the combustion section grate 102, and the rear end of the combustion section grate 102 is higher than the front end of the ember section grate 103; the drying section grate 101, the combustion section grate 102 and the burn-out section grate 103 are all provided with primary air inlets 5 for feeding air from bottom to top.

The front arch wall 2 is located above the drying section grate 101 and completely covers the drying section grate 101 in a projection manner in the vertical direction, specifically, the front end of the front arch wall 2 is overlapped with the front end of the drying section grate 101 in a projection manner in the vertical direction, the rear end of the front arch wall 2 is located above the rear end of the drying section grate 101, and the front arch wall 2 is arranged in a horizontal manner.

The rear arch wall 3 is arranged in an inclined shape with a high front part and a low rear part, the included angle between the rear arch wall 3 and the horizontal plane is 41 degrees, the rear arch wall 3 is positioned above the burn-out section fire grate 103 and the combustion section fire grate 102, one part of the rear arch wall 3 completely covers the burn-out section fire grate 103 in a projection manner in the vertical direction, the other part of the rear arch wall 3 covers the 1/2 area of the combustion section fire grate 102 in a projection manner in the vertical direction, the front end of the rear arch wall 3 is higher than the rear end of the front arch wall 2, and the rear end of the rear arch wall 3 is positioned above the rear end of the burn-out section fire grate 103.

The flue 4 is vertically arranged and connected between the rear end of the front arch wall 2 and the front end of the rear arch wall 3.

The simulation experiment result of the waste incineration grate furnace 1000 of the second embodiment is (as shown in fig. 5): as can be seen from the figure 5, the results of temperature distribution, speed distribution and resultant concentration distribution show that, compared with the existing furnace type design, the design III enhances the reradiation effect of the front arch, prolongs the retention time in the high-temperature flue gas hearth, greatly enhances the drying capacity of the garbage, and is very favorable for the drying and pyrolysis of the high-moisture garbage, thereby avoiding the phenomenon that the combustion point moves backwards because a large amount of moisture enters the combustion section.

It should be noted that, for the specific example one and the specific example two, the requirement of different garbage incineration conditions in various regions can be met according to the characteristic that the domestic garbage has high water content in China. For example, the refuse incinerator of the first embodiment may be used for the domestic refuse having a high water content, and the refuse incinerator of the second embodiment may be used for the domestic refuse having a higher water content.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.