Biomass fuel boiler

Abstract

The utility model discloses a biomass fuel boiler, and particularly relates to the technical field of biomass fuel boilers, which comprises a boiler body, a storage hopper for storing biomass fuel particles is fixedly mounted at the top of the boiler body, a bottom pipeline of the storage hopper extends into an inner cavity of the boiler body, and a combustion cage is fixedly sleeved on the bottom pipeline of the storage hopper. The center of the bottom of the combustion cage is concave upwards, an outer flow dividing cap fixedly covers the upward concave position, a gap for biomass fuel particles to pass through is reserved between the outer flow dividing cap and a bottom pipeline of the storage hopper, an air inlet pipe is led into the bottom of an inner cavity of the furnace body, and an inner flow dividing cap is fixedly connected to an air outlet of the air inlet pipe. The biomass fuel boiler comprises a boiler body, a combustion cage is arranged in the boiler body, an air inlet pipe is arranged in the combustion cage, the air inlet pipe is connected with an inner flow dividing cap through a plurality of supporting columns, a diffuser is coaxially and fixedly arranged outside an air outlet of the air inlet pipe in a sleeving mode, and a heat exchanger is fixedly connected to the top wall of an inner cavity of the boiler body. And the firepower of the biomass fuel boiler is kept stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of biomass fuel boilers, and particularly relates to a biomass fuel boiler. Background Art

[0002] A biomass fuel boiler is a heating device that uses biomass materials as fuel, and its design purpose is to convert the chemical energy of biomass fuel into heat energy for various uses. Biomass fuels include, but are not limited to, wood chips, sawdust, agricultural waste (such as rice husks, corn cobs, wheat straw), energy crops, and other organic waste.

[0003] Some of the existing biomass fuel boilers need to add fuel manually, which is rather inconvenient and results in inconsistent firepower, making the practicability of the boiler poor. And installing an electric feeding device makes the boiler structure complex and the manufacturing cost increase. Therefore, a new type of biomass fuel boiler is needed. Summary of the Utility Model

[0004] To solve the above problems, the utility model discloses a biomass fuel boiler.

[0005] To achieve the above object, the technical solution of the utility model is as follows:

[0006] A biomass fuel boiler, comprising a furnace body, a storage hopper for storing biomass fuel particles is fixedly installed at the top of the furnace body, the bottom pipeline of the storage hopper extends into the inner cavity of the furnace body, and a combustion cage is fixedly sleeved on the bottom pipeline of the storage hopper. The bottom center of the combustion cage is concave upward, and an outer shunt cap is fixedly covered at the concave upward place. A gap for passing biomass fuel particles is reserved between the outer shunt cap and the bottom pipeline of the storage hopper. An air inlet pipe is led into the bottom of the inner cavity of the furnace body, and the air outlet of the air inlet pipe is inserted upward into the concave upward place of the combustion cage. An inner shunt cap is fixedly connected at the air outlet of the air inlet pipe, and the air inlet pipe and the inner shunt cap are connected by a plurality of support columns. A disperser is coaxially and fixedly sleeved outside the air outlet of the air inlet pipe. A heat exchanger is fixedly connected to the top wall of the inner cavity of the furnace body.

[0007] As a preferred technical solution of the utility model, the heat exchanger is a spiral heat exchanger. The inner end of the spiral heat exchanger is communicated with a water inlet pipe, and the outer end of the spiral heat exchanger is communicated with a water outlet pipe. Both the water inlet pipe and the water outlet pipe penetrate through the side wall of the furnace body outward.

[0008] As a preferred technical solution of the utility model, the spiral heat exchanger is fixedly connected to the top wall of the inner cavity of the furnace body through a plurality of connecting columns at its top, and the spiral heat exchanger is sleeved outside the bottom pipeline of the storage hopper.

[0009] As a preferred technical solution of the present utility model, a ring-shaped support is fixedly connected to the top of the furnace body, and the top of the ring-shaped support is fixedly connected to the storage hopper.

[0010] As a preferred technical solution of the present utility model, a dust collecting hopper is communicated with the bottom of the furnace body, and a wire mesh is inlaid at the upper opening of the dust collecting hopper.

[0011] As a preferred technical solution of the present utility model, a spiral ash discharger is arranged at the bottom of the dust collecting hopper, and an ash discharge port adapted to the spiral ash discharger is formed in the side wall of the dust collecting hopper.

[0012] As a preferred technical solution of the present utility model, the inner flow dividing cap completely covers the air outlet of the lower intake pipe.

[0013] The beneficial effects of the present utility model are as follows:

[0014] First, after pouring biomass fuel particles into the storage hopper, the biomass fuel particles flow into the combustion cage through the gap between the outer flow dividing cap and the bottom pipe of the storage hopper until the combustion cage is full. When burning, the air blown out from the air outlet of the intake pipe is blown towards the disperser under the guidance of the inner flow dividing cap, and then is guided by the disperser to be dispersed and blown towards the combustion cage to promote the combustion of the biomass fuel particles in the combustion cage. When the biomass fuel particles in the combustion cage are burned and consumed, the biomass fuel particles in the storage hopper will automatically flow into the combustion cage to replenish. The unburned biomass fuel particles flow onto the wire mesh through the holes in the combustion cage and continue to burn. The burned ash falls into the bottom of the dust collecting hopper through the holes in the wire mesh. Thanks to the combination of gravity automatic feeding and the combustion cage, the amount of biomass fuel particles burning in the combustion cage remains consistent, making the firepower of the biomass fuel boiler stable and the structure simple.

[0015] Second, when the flowing water in the spiral heat exchanger is heated, cold water flows into the inner end of the spiral heat exchanger through the intake pipe, and then flows from the inner end of the spiral heat exchanger to the outer end. At this time, the cold water is heated into hot water under the baking of the burning biomass fuel particles and finally flows outwards from the outlet pipe. Since the inner end of the spiral heat exchanger is overall close to the combustion cage, the water inlet at the inner end of the spiral heat exchanger improves the heating efficiency of the spiral heat exchanger for cold water. Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of the embodiment of the present utility model;

[0017] Figure 2 is the overall cross-sectional view of the embodiment of the present utility model;

[0018] Figure 3 is the embodiment of the present utility model Figure 2 The enlarged view at A in;

[0019] Figure 4This is a schematic structural diagram of a spiral heat exchanger, an inlet pipe, and an outlet pipe according to an embodiment of the present utility model.

[0020] List of drawing reference numerals:

[0021] 1. Furnace body; 2. Storage hopper; 3. Combustion cage; 4. Outer shunt cap; 5. Inlet pipe; 6. Inner shunt cap; 7. Dispersion device; 8. Spiral heat exchanger; 9. Inlet pipe; 10. Outlet pipe; 11. Ring-shaped support; 12. Inspection door; 13. Ash collection hopper; 14. Wire mesh; 15. Screw ash discharger; 16. Exhaust pipe. Detailed implementation manners

[0022] The present utility model will be further clarified below in conjunction with the drawings and specific implementation manners. It should be understood that the following specific implementation manners are only used to illustrate the present utility model and not to limit the scope of the present utility model.

[0023] Please refer to Figures 1-4 , a biomass fuel boiler, including a furnace body 1. The furnace body 1 is made of heat insulation and heat preservation materials. An inspection door 12 is rotatably installed at the opening of the side wall of the furnace body 1, and a handle is fixedly connected to the outer wall of the inspection door 12. A storage hopper 2 for storing biomass fuel pellets is fixedly installed at the top of the furnace body 1. The biomass fuel pellets are made by compressing and granulating wood chips, straws, rice husks, sawdust, etc. The bottom pipe of the storage hopper 2 extends into the inner cavity of the furnace body 1, and a combustion cage 3 is fixedly sleeved on the bottom pipe of the storage hopper 2. The center of the bottom of the combustion cage 3 is concave upward, and an outer shunt cap 4 is fixedly covered at the concave upward part. A gap for passing biomass fuel pellets is reserved between the outer shunt cap 4 and the bottom pipe of the storage hopper 2. After pouring the biomass fuel pellets into the storage hopper 2, the biomass fuel pellets flow into the combustion cage 3 through the gap between the outer shunt cap 4 and the bottom pipe of the storage hopper 2 until the combustion cage 3 is full. When the biomass fuel pellets in the combustion cage 3 are burned and consumed, the biomass fuel pellets in the storage hopper 2 will automatically flow into the combustion cage 3 to replenish. The biomass fuel pellets in the bottom pipe of the storage hopper 2 will not burn due to lack of oxygen.

[0024] An inlet pipe 5 is introduced into the bottom of the inner cavity of the furnace body 1, and the outlet of the inlet pipe 5 is inserted upward into the concave upward part of the combustion cage 3. The inlet pipe 5 is connected to an external pipeline for conveying air. An inner shunt cap 6 is fixedly connected to the outlet of the inlet pipe 5, and the inlet pipe 5 and the inner shunt cap 6 are connected by a plurality of support columns. An outer coaxial fixed sleeve of a dispersion device 7 is provided at the outlet of the inlet pipe 5. The inner shunt cap 6 completely covers the outlet of the inlet pipe 5 below. The air blown out from the outlet of the inlet pipe 5 is blown towards the dispersion device 7 under the guidance of the inner shunt cap 6, and then is guided and dispersed by the dispersion device 7 and blown towards the combustion cage 3 to promote the combustion of the biomass fuel pellets in the combustion cage 3. The top wall of the inner cavity of the furnace body 1 is fixedly connected with a heat exchanger. The top of the furnace body 1 is communicated with an exhaust pipe 16 communicated with an exhaust device.

[0025] The heat exchanger is a spiral heat exchanger 8. The inner end of the spiral heat exchanger 8 is connected to a water inlet pipe 9, and the outer end of the spiral heat exchanger 8 is connected to a water outlet pipe 10. Both the water inlet pipe 9 and the water outlet pipe 10 penetrate through the side wall of the furnace body 1 outward. Cold water flows into the inner end of the spiral heat exchanger 8 through the water inlet pipe 9, and then flows from the inner end of the spiral heat exchanger 8 to the outer end. At this time, the cold water is heated into hot water under the baking of the burning biomass fuel particles, and finally flows out outward through the water outlet pipe 10. The inner end of the spiral heat exchanger 8 is integrally close to the combustion cage 3, and the heating efficiency of the cold water is high. The spiral heat exchanger 8 is fixedly connected to the top wall of the inner cavity of the furnace body 1 through a plurality of connecting columns at its top, and the spiral heat exchanger 8 is sleeved outside the bottom pipe of the storage hopper 2.

[0026] A ring-shaped support 11 is fixedly connected to the top of the furnace body 1, and the top of the ring-shaped support 11 is fixedly connected to the storage hopper 2. The setting of the ring-shaped support 11 is used to improve the load-bearing capacity of the storage hopper 2, so as to increase the loading capacity of biomass fuel particles in the storage hopper 2.

[0027] A dust collection hopper 13 is connected to the bottom of the furnace body 1, and a wire mesh 14 is inlaid at the upper opening of the dust collection hopper 13. The holes of the wire mesh 14 are smaller than the holes of the combustion cage 3. The unburned biomass fuel particles flow onto the wire mesh 14 through the holes of the combustion cage 3 and continue to burn, and the burned dust falls into the bottom of the dust collection hopper 13 through the holes of the wire mesh 14. A spiral ash extractor 15 is provided at the bottom of the dust collection hopper 13, and an ash outlet adapted to the spiral ash extractor 15 is provided on the side wall of the dust collection hopper 13. The spiral ash extractor 15 is coaxially fixedly connected to the output end of the motor. When the motor drives the spiral ash extractor 15 to rotate, the rotating blades of the spiral ash extractor 15 squeeze the dust at the bottom of the dust collection hopper 13 out through the ash outlet of the spiral ash extractor 15.

[0028] Working principle:

[0029] After pouring biomass fuel particles into the storage hopper 2, the biomass fuel particles flow into the combustion cage 3 through the gap between the outer shunt cap 4 and the bottom pipe of the storage hopper 2 until the combustion cage 3 is full. Then, the access door 12 is opened to ignite the biomass fuel particles in the combustion cage 3. At the same time, the air blown out from the air outlet of the air inlet pipe 5 is blown towards the disperser 7 under the guidance of the inner shunt cap 6, and then is dispersed and blown towards the combustion cage 3 by the disperser 7 to promote the combustion of the biomass fuel particles in the combustion cage 3. Then, the access door 12 is closed. When the biomass fuel particles in the combustion cage 3 are burned and consumed, the biomass fuel particles in the storage hopper 2 will automatically flow into the combustion cage 3 to replenish. The unburned biomass fuel particles flow onto the wire mesh 14 through the holes of the combustion cage 3 and continue to burn, and the burned dust falls into the bottom of the dust collection hopper 13 through the holes of the wire mesh 14;

[0030] When the flowing water in the spiral heat exchanger 8 is heated, cold water flows into the inner end of the spiral heat exchanger 8 through the water inlet pipe 9, and then flows from the inner end to the outer end of the spiral heat exchanger 8. At this time, the cold water is heated into hot water under the baking of the burning biomass fuel particles, and finally flows out through the water outlet pipe 10.

[0031] When ash is discharged, when the motor drives the spiral ash discharger 15 to rotate, the blades of the rotating spiral ash discharger 15 squeeze the dust at the bottom of the ash hopper 13 out through the ash outlet of the spiral ash discharger 15.

[0032] It should be noted that the above content only illustrates the technical idea of the present utility model, and the protection scope of the present utility model cannot be limited thereby. For those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements all fall within the protection scope of the claims of the present utility model.

Claims

1. A biomass fuel boiler, comprising a furnace body (1), characterized in that: A storage hopper (2) for storing biomass fuel particles is fixedly installed on the top of the furnace body (1), a bottom pipe of the storage hopper (2) extends to the inner cavity of the furnace body (1), and a combustion cage (3) is fixedly sleeved on the bottom pipe of the storage hopper (2), the bottom center of the combustion cage (3) is concave upward, and an external diverter cap (4) is fixedly covered on the upward concave part, and a gap is reserved between the external diverter cap (4) and the bottom pipe of the storage hopper (2) for passing the biomass fuel particles An air inlet pipe (5) is passed through the bottom of the inner cavity of the furnace body (1), and the air outlet of the air inlet pipe (5) is inserted upward into the upward concave part of the combustion cage (3). An inner diverter cap (6) is fixedly connected to the air outlet of the air inlet pipe (5), and the air inlet pipe (5) and the inner diverter cap (6) are connected by a plurality of support columns. A disperser (7) is coaxially fixedly sleeved outside the air outlet of the air inlet pipe (5), and a heat exchanger is fixedly connected to the top wall of the inner cavity of the furnace body (1).

2. A biomass fuel boiler according to claim 1, characterized in that: The heat exchanger is a vortex heat exchanger (8), the inner end of the vortex heat exchanger (8) is connected to a water inlet pipe (9), and the outer end of the vortex heat exchanger (8) is connected to a water outlet pipe (10), and the water inlet pipe (9) and the water outlet pipe (10) both penetrate the side wall of the furnace body (1) outward.

3. A biomass fuel boiler according to claim 2, characterized in that: The vortex heat exchanger (8) is fixedly connected to the top wall of the inner cavity of the furnace body (1) via a plurality of connecting columns at the top thereof, and the vortex heat exchanger (8) is sleeved outside the bottom pipe of the storage hopper (2).

4. The biomass fuel boiler according to claim 1, characterized in that: The top of the furnace body (1) is fixedly connected to an annular support (11), and the top of the annular support (11) is fixedly connected to the storage hopper (2).

5. The biomass fuel boiler according to claim 1, characterized in that: The bottom of the furnace body (1) is connected to an ash collecting hopper (13), and a steel wire mesh (14) is embedded in the upper opening of the ash collecting hopper (13).

6. A biomass fuel boiler according to claim 5, characterized in that: A spiral ash discharger (15) is provided at the bottom of the ash collecting hopper (13), and an ash discharge port adapted to the spiral ash discharger (15) is opened on the side wall of the ash collecting hopper (13).

7. The biomass fuel boiler according to claim 1, characterized in that: The inner flow-dividing cap (6) completely covers the air outlet of the air inlet pipe (5) below.

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