CN112050232A

CN112050232A - Biomass boiler and grate

Info

Publication number: CN112050232A
Application number: CN202010996292.4A
Authority: CN
Inventors: 洪浩; 王震坤; 冯雨; 陈壹杰; 许雪楠; 田晓霞; 隋海然; 刘菲
Original assignee: CHANGCHUN HONGXIN THERMAL ENERGY CO LTD; Jilin Great Resources Co ltd
Current assignee: CHANGCHUN HONGXIN THERMAL ENERGY CO LTD; Jilin Great Resources Co ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2020-12-08

Abstract

The invention provides a biomass boiler and a grate, wherein the biomass boiler grate comprises: the air conditioner comprises a roller, an air inlet end, an accommodating space and an air outlet gap; the outer surface of the side wall of the roller is provided with an accommodating space for accommodating fuel; the air inlet end is arranged at one end of the roller; the air outlet gap is arranged on the side wall of the roller and used for enabling air in the roller to flow to the accommodating space. The application provides a biomass boiler grate and boiler, fuel in the combustion process, the heat dissipation is fast, difficult coking.

Description

Biomass boiler and grate

Technical Field

The invention relates to the technical field of civil heating boilers, in particular to a biomass boiler and a grate.

Background

In recent years, with the improvement of the living standard of the rural areas, the civil heating small boiler is widely used in the rural areas, and the fuel mainly comprises coal, straws and wood blocks. Coal is used as fossil energy and belongs to high-pollution fuel, if a small household heating boiler is popularized in rural areas, and the boiler and the fuel are not upgraded, agricultural wastes such as straws can only be incinerated in the field, severe haze weather is caused when spring and autumn change seasons occur, the environment is not polluted, and the frequency of traffic accidents caused by repeated straw incineration on two sides of a highway is higher and higher.

Although biomass particles can be combusted in small water jacket furnaces with fixed grates for some users on the market, fuels with low ash melting points, such as straw particles, are easy to coke in the use process. Therefore, there is a need to develop a new biomass boiler and grate.

Disclosure of Invention

Objects of the invention

The invention aims to provide a biomass boiler and a grate which are not easy to coke.

(II) technical scheme

To solve the above problems, a first aspect of the present invention provides a biomass boiler grate, comprising: the outer surface of the side wall of the roller is provided with an accommodating space for accommodating fuel; the air inlet end is arranged at one end of the roller; and the air outlet gap is arranged on the side wall of the roller and used for enabling air in the roller to flow to the accommodating space.

Further, still include: and the ash collecting structure is arranged inside the roller.

Furthermore, the dust collecting structure is a dust collecting groove, the dust collecting groove is detachably connected with the roller, and a wind shield is arranged on one side of the dust collecting groove; the wind shield is arranged at the other end of the roller.

Further, still include: the baffle is arranged on the outer surface of the side wall of the roller around the axis of the roller, and a plurality of baffles are arranged at intervals to form the accommodating space.

Further, the length direction of the plurality of baffles is parallel to the axial direction of the roller, and the plurality of baffles are arranged at preset intervals.

Further, still include: and the side blocking walls are arranged on the side walls of the roller and are connected with the wide edge ends of the plurality of baffles to form a closed groove-shaped accommodating space.

Furthermore, the air outlet gap is arranged around the axis of the roller and corresponds to the accommodating space.

Furthermore, the air outlet gaps are arranged along the circumferential direction of the roller, and each air outlet gap is arranged at intervals according to the width and the preset distance.

Furthermore, the air inlet end of the roller is provided with a gear along the circumferential direction of the roller and is used for being in transmission connection with a driving device.

According to another aspect of the present invention, there is provided a biomass boiler comprising a grate according to any of the above aspects.

(III) advantageous effects

The technical scheme of the invention has the following beneficial technical effects:

1. the fire grate is through rationally arranging wind line, transmission form, cloth form for the fuel burning on the cylinder grate is fully burnt, has improved the combustion efficiency of fire grate, has avoided the coking and has solved the problem that pollutant discharge concentration is high.

2. The heat load intensity is selected, so that the feeding assembly, the air supply assembly and the grate of the biomass boiler are in adaptive linkage with each other in rotating speed and direction, and heat supply according to needs is realized.

3. Through the form of vertical arrangement tobacco pipe, make the flue gas get into from first heat delivery pipeline input (upper end) heat input end, the flue gas carries out the heat transfer with water cooling environment around, first heat delivery pipeline heat output end (lower extreme) and second heat delivery pipeline heat input end (lower extreme) intercommunication realize that the flue gas carries out the heat transfer with water cooling environment on every side, realize the biggest heat exchange efficiency through the heat transfer area realization of compactness.

Drawings

FIG. 1 is a schematic structural view of a biomass boiler grate in accordance with an embodiment of the present invention;

FIG. 2 is a schematic structural view of a grate of a biomass boiler according to an embodiment of the present invention;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a right side view of FIG. 2;

FIG. 5 is a schematic structural diagram of an ash collection structure according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an ash collection structure according to an embodiment of the present invention;

FIG. 7 is a schematic structural view of a biomass boiler according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of a biomass boiler according to an embodiment of the present invention;

fig. 9 is a top view of fig. 8.

Reference numerals:

1: a grate; 11: a drum; 110: an accommodating space; 111: an air inlet end; 112: an air outlet gap; 113: a baffle plate; 114: a side wall; 115: a gear; 116: a support part: (ii) a 12: collecting ash structure; 120: a wind deflector; 2: a support member; 3: a fuel container; 4: a spiral feeder; 5: a blower: 6: an ignition device; 7: a boiler body; 71: a fuel combustion zone; 72: a heat exchange zone; 720: a heat delivery conduit; 721: a water storage area; 73: a deashing cover plate; 74, a dust removing door; 8: an induced draft fan; 9: a make-up water tank; 10: a drive device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

In the drawings there is shown a schematic representation of an embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details may be omitted for the sake of clarity. The various regions, shapes, and relative sizes and positional relationships therebetween shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, as the actual requirements dictate.

It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.

Fig. 1 is a schematic structural view of a biomass boiler grate according to an embodiment of the invention.

Fig. 2 is a schematic structural view of a biomass boiler grate according to an embodiment of the invention.

Fig. 3 is a left side view of fig. 2.

Fig. 4 is a right side view of fig. 2.

In a first embodiment of the present invention, as shown in fig. 1-4, a biomass boiler grate 1 is provided, which mainly includes a drum 11, an accommodating space 110, an air inlet end 111 and an air outlet gap 112. The outer surface of the side wall of the drum 11 is provided with an accommodating space 110 for accommodating fuel; the air inlet end 111 is arranged at one end of the roller 11; the air outlet slits 112 are disposed on the side wall of the drum 11, and are used for allowing air in the drum 11 to flow to the accommodating space 110.

Specifically, the grate 1 may adopt an integral casting process, wherein the use process of the grate 1 includes: the biomass fuel forms a certain fuel accumulation in the accommodating space 110, hot gas with a preset temperature is introduced from the air inlet end 111, and after the fuel on the grate 1 is ignited, the grate 1 rotates at a preset rotating speed, so that the fuel on the grate 1 is preheated, volatilized and analyzed, and fixed carbon is combusted. After the fuel is burnt for a certain time, the fire grate 1 rotates reversely, and the burnt ash falls under the action of gravity, so as to realize ash removal. The fire grate 1 is through rationally arranging wind line, transmission form, cloth form for the fuel burning on the cylinder 11 fire grate 1 fully burns, has improved the combustion efficiency of fire grate 1, has avoided the coking and has solved the problem that pollutant emission concentration is high.

In some embodiments, the grate 1 further comprises an ash collection structure 12 disposed inside the drum 11.

Specifically, in the process of biomass fuel accumulation and combustion and reverse rotation of the fire grate 1, fine dust can enter the roller 11 from the air outlet gap 112, and the dust collecting structure 12 collects the dust entering the roller 11, so that the dust can be conveniently cleaned in a centralized manner.

In some embodiments, the dust collecting structure 12 is a dust collecting groove detachably connected to the drum 11, and a wind shield 120 is disposed on one side of the dust collecting groove; the wind shield 120 is provided at the other end of the drum 11.

Specifically, the ash collecting groove is barrel-shaped, the ash collecting groove is matched with the interior of the roller 11, and the ash collecting groove can be detachably connected with the roller 11 in a drawing and inserting mode; one side of the dust collecting groove is provided with a wind shield 120, and the wind shield 120 is arranged at the opposite side of the air inlet end 111 of the drum 11 to block the inlet air from flowing out from the opposite side of the air inlet end 111 of the drum 11, so that the inlet air can flow out from the air outlet gap 112.

In some embodiments, the grate 1 further includes a baffle 113. The baffle 113 is disposed on the outer surface of the sidewall of the drum 11 around the axis of the drum 11, and a plurality of baffles 113 are disposed at intervals to form the accommodating space 110.

Specifically, the outer surface of the side wall of the drum 11 and the baffle 113 are spaced to form the accommodating space 110 for accommodating fuel, the biomass fuel is accumulated on the outer surface of the side wall of the drum 11, the baffle 113 can limit the accumulated amount of the biomass fuel, and the fuel is accumulated in the accommodating spaces 110, the fuel is stored, the fuel is prevented from falling, different combustion areas are formed, the fuel volatile component is sufficiently separated and combusted, the biomass fuel is sufficiently preheated and combusted, the combustion efficiency is improved, and coking is not easy to burn. The included angle formed between the length direction of the baffle 113 and the axial direction of the drum 11 is not limited.

Preferably, the plurality of baffles 113 have a length direction parallel to the axial direction of the drum 11, and the plurality of baffles 113 are disposed at predetermined intervals.

Specifically, the grate 1 is transversely arranged when in use, that is, the axial direction of the grate 1 is horizontally arranged, the length directions of the baffles 113 are parallel to the axial direction of the roller 11, that is, the baffles 113 are transversely arranged and preset in length, and the baffles 113 are arranged at preset intervals, so that the capacity of the accommodating space 110 is controllable, and the biomass fuel quantity is controllable.

In some embodiments, the grate 1 further includes side walls 114. The side wall 114 is disposed on the side wall of the drum 11 and connected to the wide ends of the plurality of baffles 113 to form a closed groove-shaped receiving space 110.

Specifically, the side wall 114 and the baffle 113 limit the biomass fuel to form the closed groove-shaped accommodating space 110, so as to limit the biomass fuel, prevent the unburned fuel from falling during the rotation of the drum 11, and further improve the combustion efficiency of the fuel. Wherein, the side wall 114 is ring-shaped or trumpet-shaped.

In some embodiments, the air outlet slits 112 are disposed around the axis of the drum 11, and the air outlet slits 112 correspond to the accommodating space 110.

Specifically, the air outlet gap 112 is used for introducing the intake air into the drum 11 and flowing into the accommodating space 110, so as to preheat the biomass fuel and ignite the fuel. The air outlet gaps 112 arranged around the axis of the roller 11 can uniformly heat the biomass fuel, quickly ignite the fuel, prevent the fuel from coking easily, and simultaneously realize uniform and quick heat dissipation of the fire grate 1. The included angle formed by the air outlet gap 112 and the axis of the drum 11 is not limited.

Preferably, the air outlet slits 112 are arranged along the circumferential direction of the drum 11, and each air outlet slit 112 is arranged according to the width and the preset distance interval between a plurality of air outlet slits 112.

Specifically, the air outlet slits 112 are arranged according to a preset width and the spacing distance between the air outlet slits 112, and specific parameters are not limited.

Preferably, the air outlet slit 112 and the accommodating space 110 are disposed at the middle of the outer side surface of the drum 11.

In some embodiments, the air inlet end 111 of the drum 11 is provided with a gear 115 along the circumference of the drum 11 for driving connection with the driving device 10.

Specifically, a gear 115 is disposed along the circumferential direction of the air inlet end 111 of the drum 11, and the gear 115 is in transmission connection with the driving device 10, so as to rotate the grate 1 according to a preset rotation speed and realize the change of the rotation direction. For example, the clockwise rotation is changed to the counterclockwise rotation, and the counterclockwise rotation is changed to the clockwise rotation.

In some embodiments, the drum 11 is provided with a support portion 116 in the axial direction for supporting the component 2.

Specifically, the two sides of the baffle 113 are respectively provided with a first supporting section and a second supporting section, the wall thickness of the first supporting section and the wall thickness of the second supporting section reach the thickness of the weight of the fuel needed by the bearing roller 11 and the operation, and the first supporting section and the second supporting section can be fixed below the fire grate 1 and directly contact with a steel back composite bearing to realize stable operation. However, the use of only the steel-backed composite bearing as the support member 2 is not limited thereto.

Fig. 5 is a schematic structural diagram of an ash collecting structure according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of an ash collecting structure according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a biomass boiler according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a biomass boiler according to an embodiment of the present invention.

Fig. 9 is a top view of fig. 8.

According to another aspect of the present invention, as shown in fig. 5-9, there is provided a biomass boiler comprising the grate 1 of any one of the above aspects.

In some embodiments, the biomass boiler further comprises a charging assembly. The feeding assembly is used for conveying biomass fuel with preset weight to the accommodating space 110 of the grate 1.

In some embodiments, the feeding assembly includes a fuel container 3 and a spiral feeder 4, a fuel output end of the fuel container 3 is communicated with a fuel input end of the spiral feeder 4, and the biomass fuel is placed into the accommodating space 110 of the grate 1 through the fuel output end of the spiral feeder 4.

Specifically, the fuel container 3 is funnel-shaped, a large opening of the fuel container is a fuel input end, and a small opening of the fuel container is a fuel output end; the fuel output end of the fuel container 3 is communicated with the fuel input end of the spiral feeding machine 4, the fuel output end of the spiral feeding machine 4 is arranged corresponding to the accommodating space 110 of the fire grate 1, the fuel output end of the spiral feeding machine 4 is higher than the accommodating space 110 of the fire grate 1, and the biomass fuel vertically falls to the accommodating space 110 of the fire grate 1 through the fuel output end of the spiral feeding machine 4.

In some embodiments, the biomass boiler further comprises an air supply assembly. The air outlet end of the air supply assembly is communicated with the air inlet end 111 of the grate 1, so that hot air with preset temperature and flow velocity is conveyed to the grate 1.

Specifically, the air supply assembly comprises an air blower 5 and an air pipe; the air outlet end of the air pipe is communicated with the air inlet end 111 of the fire grate 1, and the air inlet end 111 of the air pipe is communicated with the output end of the air blower 5.

In some embodiments, a sealing ring is disposed at a connection between the air outlet end of the air duct and the air inlet end 111 of the grate 1.

In some embodiments, the ash collecting structure 12 is provided with a mounting portion at a side close to the air inlet end 111 of the grate 1 for mounting an air duct.

Specifically, one side of the ash collecting structure 12 close to the air inlet end 111 of the grate 1 is provided with a mounting hole, the mounting hole is matched with an air pipe and used for mounting the air pipe, and a sealing ring is arranged between the mounting hole and the air pipe.

In some embodiments, the biomass boiler further comprises an ignition device 6 for igniting the fuel.

Specifically, the ignition device 6 is an automatic igniter, and the automatic igniter generates heat after being powered on. The nozzle of the automatic igniter corresponds to the intersection point of the vertical fuel blanking path and the tangential direction of the roller 11, so that the heat is concentrated to ignite the fuel on the fire grate 1 of the roller 11, and the ignition point of the fuel is the fuel blanking position on the fire grate 1.

In some embodiments, the ignition device 6 includes a heat output, and the heat input of the blower assembly is in communication with the heat output of the ignition device 6.

Specifically, the air pipe comprises a heat input end, and the heat input end of the air pipe is communicated with a heat output end of the ignition device 6, so that the heat of the ignition device 6 enters the fire grate 1 through an air inlet end 111 of the roller 11 along with the inlet air.

In some embodiments, the biomass boiler further comprises a boiler body 7, the boiler body 7 mainly comprises a fuel combustion zone 71 and a heat exchange zone 72, and a heat output end of the fuel combustion zone 71 is communicated with a heat output end of the heat exchange zone 72; the fuel combustion zone 71 comprises a solid fuel combustion zone and a volatile matter combustion zone, and heat generated by the fuel combustion zone 71 enters the heat exchange zone 72 after passing through the volatile matter combustion zone.

Specifically, the boiler body 7 is a cuboid, a straight line of a long side of the cuboid is perpendicular to the axial direction of the fire grate 1, a straight line of a wide side of the cuboid is parallel to the axial direction of the fire grate 1, the fuel combustion area 71 and the heat exchange area 72 are adjacently arranged from left to right, the solid fuel combustion area of the fuel combustion area 71 is arranged below the volatile combustion area, the fire grate 1 is arranged in the boiler body 7 and is arranged in the solid fuel combustion area, the fuel vertically falls on the fire grate 1, meanwhile, the ignition device 6 is switched on to realize ignition of the biomass fuel, the volatile of the biomass fuel enters the volatile combustion area and burns, after the preset time, namely after the ignition of the biomass fuel, the fire grate 1 rotates in the direction opposite to the ignition device 6 to realize full combustion of the biomass fuel, the heat generated by the combustion of the biomass fuel passes through the volatile combustion area from bottom to top, the heat generated by the combustion of the volatiles and the heat generated by the combustion of the biomass fuel enter the heat transfer zone 72 where a portion of the heat flows in the form of flue gas.

In some embodiments, the heat exchange area 72 includes a heat delivery conduit 720 and a water storage area 721, the water storage area 721 being disposed around the delivery conduit.

Specifically, the heat input end of the heat transmission pipeline 720 is the heat input end of the heat exchange area 72, the water storage area 721 stores water to be heated, the water to be heated surrounds the heat transmission pipeline 720, and the heat in the heat transmission pipeline 720 is heated by heat transfer. In the process of generating heat in the fuel combustion zone 71, heating of water to be heated is achieved by means of heat radiation.

Preferably, the heat transporting pipe 720 is perpendicular to the axial direction of the fire grate 1 and is arranged in parallel with the long side of the rectangular boiler body 7.

In some embodiments, the heat exchange area 72 includes a first heat exchange area 72 and a second heat exchange area 72, the heat transfer pipes 720 include a first heat transfer pipe and a second heat transfer pipe, the water storage area 721 includes a first water storage area and a second water storage area, the first heat transfer pipe and the first water storage area are disposed in the first heat exchange area 72, the second heat transfer pipe and the second water storage area are disposed in the first heat exchange area 72, wherein a heat input end of the first heat transfer pipe is communicated with a heat output end of the fuel combustion area 71, and a heat output end of the first heat transfer pipe is communicated with a heat input end of the second heat transfer pipe; the first water storage area is communicated with the second water storage area.

In some embodiments, the first heat transport pipe includes a plurality of first heat transport branch pipes, the second heat transport pipe includes a plurality of second heat transport branch pipes, and the number of the first heat transport branch pipes is greater than the number of the second heat transport branch pipes.

Specifically, vertical arrangement's first heat transfer pipe and second heat transfer pipe, the flue gas gets into from the heat input end of first heat transfer pipe upper end, heat with area heating water around the first heat transfer pipe and carry out the heat transfer, carry out a heat transfer, the flue gas circulates second heat transfer pipe from bottom to top, heat with area heating water around the second heat transfer pipe and carry out the heat transfer, carry out the secondary heat transfer, discharge from the exhanst gas outlet on second heat transfer pipe upper portion at last, effectively utilize the heat transfer area of compactness to realize the biggest heat exchange efficiency.

In some embodiments, the heat input end of the second heat transfer conduit is provided with an induced draft fan 8.

In some embodiments, the biomass boiler further comprises a make-up water tank 9, and an output end of water to be heated of the make-up water tank 9 is communicated with an input end of water to be heated of the water storage region 721.

Specifically, the make-up water tank 9 is arranged at the top of the furnace body, the water inlet of the make-up water tank 9 is arranged at the top of the make-up water tank 9, the bottom of the make-up water tank 9 is provided with an output end to be heated, and the output end to be heated of the make-up water tank 9 is communicated with the input end to be heated of the water storage area 721.

In some embodiments, the biomass boiler further comprises a driving device 10, and the driving device 10 is in transmission connection with the gear 115 of the grate 1.

Specifically, the driving motor of the drum 11 is in transmission connection with the gear 115 of the drum 11 through a transmission chain. The driving motor of the roller 11 is in linkage control with the feeding assembly, so that the feeding speed of the feeding assembly is matched with the rotating speed of the roller 11, and an ideal combustion working condition is realized. Wherein, the drum 11 driving motor and the blower 5 of the air supply assembly can be arranged below the feeding assembly. Specifically, based on different requirements, the rotation speed and the direction of the feeding assembly, the air supply assembly and the grate 1 can be adjusted to be different and matched in linkage.

In some embodiments, the top of the furnace body is provided with a soot cover 73.

In some embodiments, the lower portion of the furnace body is provided with a dust door 74

Specifically, heat transfer pipe 720 is vertical to be set up, and the deashing of being convenient for is opened deashing apron 73, uses general deashing instrument can realize the thorough deashing to heat transfer pipe 720, and the dust is discharged from deashing door 74, and durable avoids the problem that heat transfer pipe 720 blockked up.

The operation process of the boiler comprises the following steps:

the biomass fuel falls from the fuel container 3 to the spiral feeder 4, and the biomass fuel vertically falls on the grate 1 of the roller 11 through the spiral feeder 4. At the same time, the blower 5 and the automatic ignition device 6 are started, and the fuel on the grate 1 is ignited for one to two minutes. The roller 11 driving motor starts to drive the fire grate 1 to rotate at a certain rotating speed, and the fuel on the fire grate 1 starts to pass through the stages of preheating, volatilization analysis, fixed carbon combustion and the like.

The high temperature flue gas flows through the combustion area and is heated to be heated through radiation, then the flue gas enters the heat conveying pipeline 720, heat exchange is carried out on the to-be-heated water around the heat conveying pipeline 720, and finally the flue gas induced draft fan 8 is drawn out and is exhausted into the atmosphere.

The maintenance of the boiler includes:

the boiler can be maintained regularly, specifically, after the ash removal cover plate 73 at the top of the boiler is opened, an ash removal tool with the same inner diameter as a smoke tube is selected, the smoke tube is dredged repeatedly from top to bottom, collected ash in the smoke tube can be thoroughly removed, and fallen smoke is discharged from the ash removal door 74 at the lower part of the boiler.

1. the fire grate 1 is through rationally arranging wind line, transmission form, cloth form for the fuel burning on the cylinder 11 fire grate 1 fully burns, has improved the combustion efficiency of fire grate 1, has avoided the coking and has solved the problem that pollutant emission concentration is high.

2. The heat load intensity is selected, so that the feeding assembly, the air supply assembly and the grate 1 of the biomass boiler are in adaptive linkage with each other in rotating speed and direction, and heat supply according to needs is realized.

The invention has been described above with reference to embodiments thereof. However, these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof. Various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the invention, and these alternatives and modifications are intended to be within the scope of the invention.

Claims

1. A biomass boiler grate (1), characterized in that it comprises:

the outer surface of the side wall of the roller (11) is provided with an accommodating space (110) for accommodating fuel;

an air inlet end (111) arranged at one end of the roller (11);

and the air outlet gap (112) is arranged on the side wall of the roller (11) and is used for enabling air in the roller (11) to flow to the accommodating space (110).

2. The biomass boiler grate (1) of claim 1, further comprising:

an ash collecting structure (12) arranged inside the drum (11).

3. The biomass boiler grate (1) of claim 2,

the ash collecting structure (12) is an ash collecting groove, the ash collecting groove is detachably connected with the roller (11), and one side of the ash collecting groove is provided with a wind shield (120);

the wind deflector (120) is disposed at the other end of the drum (11).

4. The biomass boiler grate (1) of claim 1, further comprising:

the baffle (113), the baffle (113) encircles the axis of the cylinder (11) and is arranged on the outer surface of the side wall of the cylinder (11), and a plurality of baffles (113) are arranged at intervals to form the accommodating space (110).

5. The biomass boiler grate (1) of claim 4,

the length directions of the baffles (113) are parallel to the axial direction of the roller (11), and the baffles (113) are arranged at preset intervals.

6. The biomass boiler grate (1) of claim 5, further comprising:

and the side baffle walls (114) are arranged on the side wall of the roller (11) and are connected with the wide edge ends of the baffles (113) to form the closed groove-shaped accommodating space (110).

7. The biomass boiler grate (1) of claim 1,

the air outlet gap (112) is arranged around the axis of the roller (11), and the air outlet gap (112) corresponds to the accommodating space (110).

8. The biomass boiler grate (1) of claim 7,

the air outlet gaps (112) are arranged along the circumferential direction of the roller (11), and each air outlet gap (112) is arranged at intervals according to the width and the preset distance of the air outlet gaps (112).

9. The biomass boiler grate (1) of claim 1,

and the air inlet end (111) of the roller (11) is provided with a gear (115) along the circumferential direction of the roller (11) and is used for being in transmission connection with a driving device.

10. A biomass boiler, comprising:

a grate (1) according to any of the claims 1-9.