Air distribution device for biomass boiler

Abstract

The utility model relates to the field of boilers, in particular to an air distribution device for a biomass boiler, which comprises a boiler body, an air inlet pump, air inlet pipes and an air inlet pointed cone, one end of each air inlet pipe is communicated with the air inlet pump, and the other end of each air inlet pipe penetrates through a combustion chamber of the boiler body; and the multiple air inlet pointed cones are vertically and fixedly installed on the upper surface of the bottom partition plate, air inlet cavities are formed in the air inlet pointed cones, the air inlet cavities of the air inlet pointed cones communicate with the air inlet pipe, and multiple air outlet holes communicating with the air inlet cavities are formed in the tops of the air inlet pointed cones. According to the scheme, when air flows into the air inlet pointed cone through the air inlet pipe, the air passes through the air inlet cavity of the air inlet pointed cone and then is discharged into the bottom side of the solid biomass fuel through the air outlet hole, so that the bottom side of the solid biomass fuel is in full contact with the air, and flames can be quickly introduced into the solid biomass fuel; the solid biomass fuel is fully combusted, and heat energy of the solid biomass fuel can be quickly and fully released.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler technical field especially relates to a kind of air distribution device for biomass boiler. BACKGROUND

[0002] Biomass fuel is to burn biomass material as fuel, mainly from agricultural and forestry waste, is a renewable, low-carbon and resource-rich energy. Biomass fuel is mainly divided into biomass briquette and biomass solid briquette. Biomass briquette is made by crushing, mixing, extruding, drying and other processes, which can be directly combusted. Biomass solid briquette includes biomass pellets, wood chips, wood chips and other solid biomass fuels. As a clean, low-carbon energy form, biomass fuel has broad prospects for development.

[0003] When biomass fuel is burned in the furnace, the flame of combustion can only contact the surface of most biomass fuel. When rapid combustion is needed to obtain heat energy, the combustion will be relatively slow, and the heat energy release will also be relatively slow. At the same time, it is also difficult to stir the solid biomass fuel during the combustion process. The internal combustion of biomass fuel is prone to incomplete combustion, which leads to the waste of part of biomass energy. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the utility model provides an air distribution device for biomass boiler to solve the problem of incomplete combustion of solid biomass fuel in the combustion process.

[0005] In order to achieve the above purpose, the basic scheme of the utility model is as follows: an air distribution device for biomass boiler, comprising a boiler body, a bottom baffle, a top baffle and a cover are sequentially arranged from bottom to top in the boiler body, a combustion chamber is formed between the inner wall of the boiler body, the bottom baffle and the top baffle, a heating chamber is formed between the inner wall of the boiler body, the top baffle and the cover, and the air distribution device further comprises:

[0006] An air inlet pump;

[0007] A plurality of air inlet pipes, one end of each of the plurality of air inlet pipes is in communication with the air inlet pump, and the other end of the air inlet pipe penetrates the combustion chamber of the boiler body;

[0008] A plurality of air inlet cones, each of the plurality of air inlet cones is vertically fixedly installed on the upper surface of the bottom baffle, an air inlet cavity is arranged in the air inlet cone, the air inlet cavity of the air inlet cone is in communication with the air inlet pipe, and a plurality of air outlet holes in communication with the air inlet cavity are arranged on the top of the air inlet cone.

[0009] The technical principle of the utility model is: when the combustion chamber is equipped with air, the air inlet pipe can cooperate with the air inlet pump to pump air into the combustion chamber quickly to provide sufficient oxygen for the combustion of the biomass fuel in the combustion chamber; when the biomass fuel is put into the combustion chamber, the solid biomass fuel impacts on the air inlet sharp cone, the air inlet sharp cone is inserted into the solid biomass fuel, when air flows into the air inlet sharp cone through the air inlet pipe, the air passes through the air inlet cavity of the air inlet sharp cone and is discharged to the bottom side of the solid biomass fuel through the air outlet hole, so that the bottom side of the solid biomass fuel is in full contact with air, and then the flame can be quickly introduced into the inside of the solid biomass fuel, so that the solid biomass fuel is fully burned, and the heat energy of the solid biomass fuel can be quickly and fully released.

[0010] Further, the utility model further includes a plurality of air inlet valves for controlling whether the air inlet pipe is connected, and the plurality of air inlet valves are in one-to-one correspondence with the plurality of air inlet pipes.

[0011] Through the above arrangement, the air inlet valve can control the timing of air inlet and closing of the air inlet pipe, and then the combustion intensity of the biomass fuel can be controlled through the air inlet valve, so that the combustion stage of the biomass fuel can be matched with the heating stage of the heating chamber.

[0012] Further, the utility model further includes a plurality of air distribution pipes, the plurality of air distribution pipes are connected with the air inlet pipe, the plurality of air distribution pipes are arranged on the inner wall of the combustion chamber of the boiler body, and a plurality of air inlet holes are arranged on the plurality of air distribution pipes.

[0013] Through the above arrangement, the air inlet pipe transmits air to the air distribution pipe, the air inlet holes on the air distribution pipe disperse and deliver air to the combustion chamber, and uniform oxygen supply is provided for the combustion of the biomass fuel.

[0014] Further, a plurality of ash outlet holes are arranged on the bottom partition plate, and the air inlet sharp cone is located between two adjacent ash outlet holes.

[0015] Through the above arrangement, the ash of the burned biomass fuel can be discharged from the ash outlet hole, the bottom partition plate can maintain a relatively clean ventilation state, and the biomass fuel combustion efficiency is high and sufficient.

[0016] Further, the air outlet hole is arranged obliquely, and the end of the air outlet hole away from the axis of the air inlet sharp cone is lower than the end of the air outlet hole close to the axis of the air inlet sharp cone.

[0017] Through the above arrangement, since the air outlet hole on the air inlet sharp cone is arranged obliquely, the outflow of air can be ensured, and the ash formed after the combustion of the biomass fuel can be prevented from entering the air inlet sharp cone, so that the air inlet sharp cone can maintain a smooth state of air.

[0018] Further, the plurality of air outlet holes are located at the upper end of the air inlet sharp cone, and the connection part of the air inlet sharp cone and the air inlet pipe is located at the lower end of the air inlet sharp cone.

[0019] The above configuration allows the air entering the intake cone to be transferred from bottom to top, making it easier for the air to be delivered to the middle of the biomass fuel. This facilitates the rapid introduction of the flame into the interior of the solid biomass fuel, ensuring its complete combustion.

[0020] Furthermore, several air outlets are evenly arranged around the circumference of the air inlet cone.

[0021] The above settings allow air to be evenly distributed into the interior of solid biomass fuel, further improving the uniformity of biomass fuel combustion. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the axial direction of an air distribution device for a biomass boiler in an embodiment of this utility model.

[0023] Figure 2 This is a schematic diagram of the structure of a biomass boiler air distribution device in the main view of an embodiment of this utility model.

[0024] Figure 3 for Figure 2 Sectional view at point AA.

[0025] Figure 4 for Figure 3 Enlarged view of a single intake cone.

[0026] In the above-mentioned attached drawings: boiler body 10, bottom baffle 101, ash outlet hole 102, top baffle 103, cover 104, ash collection box 105, air inlet pipe 20, air inlet cone 30, air inlet cavity 301, air outlet hole 303, air inlet valve 40, diversion pipe 50, and air inlet hole 501. Detailed Implementation

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0028] This embodiment is basically as follows: Figures 1-4As shown in the utility model embodiment, the air distribution device for the biomass boiler comprises a boiler body 10, an air inlet pump (not shown), two air inlet pipes 20, a plurality of air inlet sharp cones 30, two air inlet valves 40 for controlling whether the air inlet pipes 20 are communicated, and a shunt air pipe 50. The bottom baffle 101, the top baffle 103, and the cover 104 are sequentially arranged in the boiler body 10 from bottom to top. The combustion chamber is formed between the inner wall of the boiler body 10, the bottom baffle 101, and the top baffle 103. The heating chamber is formed between the inner wall of the boiler body 10, the top baffle 103, and the cover 104. The bottom baffle 101 is provided with a plurality of ash outlets 102. The combustion chamber of the boiler body 10 is provided with a feeding door for feeding biomass fuel. The bottom of the bottom baffle 101 is provided with a dust collecting box 105 which can be horizontally pulled out. The dust collecting box 105 can cover the ash outlets 102. The upper surface of the dust collecting box 105 can be attached to the lower surface of the bottom baffle 101.

[0029] As shown in Figure 1 , 2 and 3, one end of each of the two air inlet pipes 20 is communicated with the air inlet pump. The other end of each of the air inlet pipes 20 penetrates through the combustion chamber of the boiler body 10. The two air inlet valves 40 are opposite to the two air inlet pipes 20 respectively. The shunt air pipe 50 is communicated with the air inlet pipe 20. The shunt air pipe 50 is distributed and installed on the inner wall of the combustion chamber of the boiler body 10. The shunt air pipe 50 is provided with a plurality of air inlets 501.

[0030] As shown in Figure 3 and 4 , the plurality of air inlet sharp cones 30 are vertically welded on the upper surface of the bottom baffle 101. The air inlet sharp cone 30 is located between the adjacent two ash outlets 102. The air inlet sharp cone 30 is provided with an air inlet cavity 301. The air inlet cavity 301 of the air inlet sharp cone 30 is communicated with the air inlet pipe 20. The top of the air inlet sharp cone 30 is provided with four air outlets 303 which are communicated with the air inlet cavity 301. The air outlet 303 is obliquely arranged. The end of the air outlet 303 which is far away from the axis of the air inlet sharp cone 30 is lower than the end of the air outlet 303 which is close to the axis of the air inlet sharp cone 30. The four air outlets 303 are located at the upper end of the air inlet sharp cone 30. The communication position of the air inlet sharp cone 30 and the air inlet pipe 20 is located at the lower end of the air inlet sharp cone 30.

[0031] In addition, as shown in Figure 4 , the air outlets 303 are uniformly arranged around the circumference of the air inlet sharp cone 30.

[0032] In use, the feeding door is opened, and the solid biomass fuel is placed into the combustion chamber of the boiler body 10. The solid biomass fuel impacts on the air inlet sharp cone 30. The air inlet sharp cone 30 is inserted into the solid biomass fuel. The feeding door on the boiler body 10 is closed.

[0033] When the biomass fuel is ignited and combusted, the air inlet pump is opened synchronously, the air inlet pump pumps air into the air inlet pipe 20, the air inlet valve 40 is opened, air enters the other end of the air inlet pipe 20, at this time the air inlet pipe 20 transmits air to the branch air pipe 50 and the air inlet sharp cone 30, most of the air is fully filled into the combustion chamber through the air inlet, oxygen is supplied for the combustion of the biomass fuel; at the same time, since the air inlet sharp cone 30 is embedded in the middle part of the solid biomass fuel, at this time the air in the air inlet pipe 20 is discharged to the bottom side of the solid biomass fuel through the air outlet hole 303 after passing through the air inlet cavity 301 of the air inlet sharp cone 30, so that the bottom side of the solid biomass fuel is fully in contact with air, and then the flame can be quickly introduced into the inside of the solid biomass fuel, so that the solid biomass fuel is fully combusted, and the heat energy of the solid biomass fuel can be quickly and fully released.

[0034] When the air inlet sharp cone 30 transports air, since the air outlet hole 303 on the air inlet sharp cone 30 is inclined, the outflow of air can be ensured, and the ash formed after the combustion of the biomass fuel is difficult to enter the air inlet sharp cone 30, so that the air inlet sharp cone 30 can continuously maintain the unobstructed state of air; at the same time, the ash after combustion is discharged to the ash collecting box 105 through the ash outlet hole 102, when the ash collecting box 105 collects a large amount of ash, the ash collecting box 105 is pulled out horizontally, the ash is cleaned, and then pushed back to the bottom partition plate 101, the ash is collected again, so that the ash is fully collected and cleaned.

[0035] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A biomass boiler air distribution device, comprising a boiler body, a bottom baffle, a top baffle and a cover cap are sequentially arranged from bottom to top in the boiler body, a combustion chamber is formed between the inner wall of the boiler body, the bottom baffle and the top baffle, and a heating chamber is formed between the inner wall of the boiler body, the top baffle and the cover cap, characterized in that, Also comprising: an air inlet pump; a plurality of air inlet pipes, one end of each of the plurality of air inlet pipes being in communication with the air inlet pump, the other end of each of the plurality of air inlet pipes penetrating the combustion chamber of the boiler body; a plurality of air inlet cones, each of the plurality of air inlet cones being vertically fixedly installed on the upper surface of the bottom baffle, an air inlet cavity being provided in each of the plurality of air inlet cones, the air inlet cavity of each of the plurality of air inlet cones being in communication with the air inlet pipe, a plurality of air outlet holes being provided on the top of each of the plurality of air inlet cones and being in communication with the air inlet cavity.

2. The air distribution device for a biomass boiler according to claim 1, characterized in that a plurality of air inlet valves for controlling whether the plurality of air inlet pipes are in communication, each of the plurality of air inlet valves being in one-to-one correspondence with each of the plurality of air inlet pipes.

3. The air distribution device for a biomass boiler according to claim 1, wherein a plurality of shunt air pipes, each of the plurality of shunt air pipes being in communication with the air inlet pipe, the plurality of shunt air pipes being distributedly installed on the inner wall of the combustion chamber of the boiler body, a plurality of air inlet holes being provided on each of the plurality of shunt air pipes.

4. The air distribution device for a biomass boiler according to claim 1, wherein a plurality of ash outlet holes being provided on the bottom baffle, each of the plurality of air inlet cones being located between two adjacent ash outlet holes.

5. The air distribution device for a biomass boiler according to any one of claims 1 to 4, characterized in that the air outlet holes being obliquely arranged, the end of each of the air outlet holes that is far away from the axis of the air inlet cone being lower than the end of each of the air outlet holes that is close to the axis of the air inlet cone.

6. The air distribution device for a biomass boiler as claimed in claim 5, wherein each of the plurality of air outlet holes being located at the upper end of the air inlet cone, the communication position of the air inlet cone and the air inlet pipe being located at the lower end of the air inlet cone.

7. The air distribution device for a biomass boiler as claimed in claim 6, wherein the plurality of air outlet holes being uniformly arranged around the circumference of the air inlet cone.

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