A straw bale burning method and a straw bale burning biomass boiler

Abstract

The present invention discloses a method for burning straw bales and a biomass boiler for burning straw bales, belonging to the technical field of straw combustion. The method for burning straw bales of the present invention includes: Step 1: Straw bales enter into a plurality of combustion chambers in the same horizontal plane through a plurality of feeding cylinders in different directions; Step 2: Air flows at the gap formed on the side where the plurality of combustion chambers are close to each other, so that the sides of the straw bales in different directions close to each other are in full contact with the air; Step 3: Under the assistance of air combustion, the sides of the straw bales in different directions close to each other start to burn. At the same time, the sides of the straw bales close to the gap during combustion heat each other to assist combustion, so that the straw bales burn sufficiently; Step 4: The ashes generated after the straw near the gap burns fall along the hollow part of the combustion chamber. The present invention realizes multi-side feeding through a plurality of feeding cylinders in different directions, and the multi-directional straw burns simultaneously and heats each other to assist combustion, improving the combustion efficiency and making the straw burn more fully.

Description

Technical Field

[0001] The present invention relates to the technical field of straw combustion, and more specifically, to a method for burning straw bales and a biomass boiler for burning straw bales. Background Art

[0002] A biomass boiler is a boiler that uses biomass energy as fuel. Straw is exactly an important biomass fuel. There are two ways to burn straw, namely loose burning and bale burning. Loose burning has sufficient combustion, but straw has a small density and a large volume, making it inconvenient for transportation; when burning bales, although the volume of straw bales is small and transportation is convenient, their density is large and the humidity is also relatively high, making it difficult to burn fully. Therefore, how to provide a biomass boiler that can burn straw bales fully is an urgent problem for those skilled in the art to solve. Summary of the Invention

[0003] In view of this, the present invention aims to provide a biomass boiler for burning straw bales and a method for burning straw bales to at least partly solve one of the above technical problems in the prior art.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for burning straw bales, comprising the following steps:

[0006] Step 1: Straw bales enter into a plurality of combustion chambers in the same horizontal plane through a plurality of feed cylinders in different directions;

[0007] Step 2: Air flows at the gap formed on the side where a plurality of combustion chambers are close to each other, so that the sides of straw bales in different directions that are close to each other are in full contact with air;

[0008] Step 3: Under the assistance of air combustion, the sides of straw bales in different directions that are close to each other start to burn. At the same time, the sides of straw bales close to the gap during combustion heat each other to assist combustion, so that the straw bales burn fully;

[0009] Step 4: The ashes generated after the straw near the gap burns fall along the hollow part of the combustion chamber, and the unburned part travels towards the direction close to the combustion chamber under the action of thrust and continues to burn.

[0010] A biomass boiler for burning straw bales, comprising:

[0011] A furnace body;

[0012] A plurality of feed cylinders, a plurality of the feed cylinders are circumferentially arranged at intervals on the periphery of the furnace body, the feed end of which is communicated with the outside air, and the discharge end penetrates through the side wall of the furnace body and extends to the middle part of the inner cavity of the furnace body;

[0013] Multiple hollow combustion chambers, one end of each of the multiple combustion chambers is provided with a straw bale inlet, and the straw bale inlets are respectively connected to the discharge end of the feed cylinder in one-to-one correspondence. The multiple combustion chambers are all in the same plane and there is a gap between the mutually adjacent side surfaces of the combustion chambers; the multiple combustion chambers are all communicated with the inner cavity of the furnace body;

[0014] An air inlet cylinder, one end of the air inlet cylinder is communicated with the outside air, and the other end penetrates through the side wall of the furnace body and extends to the middle of the inner cavity of the furnace body below the combustion chamber;

[0015] An exhaust cylinder, the exhaust cylinder is fixed at the top end of the furnace body and its inner cavity is communicated with the inner cavity of the furnace body.

[0016] The beneficial effects of the present invention: Straw bales are fed from multiple sides through multiple feed cylinders in different directions. The straws entering the combustion chambers burn simultaneously to play a role of mutual temperature increase, improving the combustion efficiency. At the same time, due to the gaps between the combustion chambers, the contact area with air is increased, making the straw burn more fully.

[0017] Further, a sealing cover is hingedly connected to the feed end of each feed cylinder.

[0018] Further, the combustion chamber includes a plurality of connecting rods and a retaining net. The plurality of connecting rods are all parallel to the axial direction of the corresponding feed cylinder and are circumferentially and evenly spaced and fixed at the discharge end of the feed cylinder. The net surface of the retaining net is arranged along the height direction of the furnace body, and the circumferential side of one net surface is connected to the other ends of the plurality of connecting rods to form the combustion chamber. The plurality of retaining nets are all in the same horizontal plane and there is the gap between the mutually adjacent net surfaces.

[0019] Further, a plurality of reinforcing rods are provided between every two adjacent retaining nets, and both ends of each reinforcing rod are respectively connected to the mutually adjacent net surfaces of the two adjacent retaining nets.

[0020] Further, the air inlet cylinder includes a preheating section and a heat preservation section. An annular cavity is formed in the furnace body. The preheating section is arranged in the exhaust cylinder and one end thereof penetrates through the upper side wall of the exhaust cylinder to communicate with the outside air; the heat preservation section is arranged in the annular cavity, one end thereof penetrates through the lower side wall of the exhaust cylinder to communicate with the other end of the preheating section, and the other end penetrates through the inner wall of the lower end of the furnace body and extends to the middle of the inner cavity of the furnace body below the combustion chamber.

[0021] Further, an exhaust fan is provided on the exhaust cylinder.

[0022] Further, the ash receiving device includes an ash hopper, a bracket, and an ash receiving flap assembly. A dust cleaning port communicating the outside air with the inner cavity of the furnace body is provided at the lower part of the furnace body. The outer wall of the upper end of the ash hopper is fixed on the inner wall of the lower part of the furnace body. The bottom end of the ash hopper extends to the position corresponding to the dust cleaning port, and an ash falling port is provided at the bottom end of the ash hopper. The bracket is arranged along the height direction of the furnace body and one end thereof is fixed on the outer side wall of the ash hopper. The ash receiving flap assembly is hinged to the other end of the bracket to cover the ash falling port.

[0023] Further, the ash receiving flap assembly includes an ash receiving flap and a counterweight. The middle of the upper plate surface of the ash receiving flap is hinged to the end of the bracket away from the ash hopper, and one side end thereof can extend to the other side of the ash hopper away from the bracket to cover the ash falling port. The counterweight is fixed on the lower plate surface of the ash receiving flap on the side away from the ash falling port.

[0024] Further, a pushing device is also provided at the feeding end of each feeding cylinder. The pushing device includes a fixed seat, a cylinder, and a pushing plate. The fixed seat is fixed on the ground near the feeding end of the feeding cylinder. The cylinder is coaxially arranged with the feeding cylinder and fixed on the fixed seat. The pushing plate is fixed at the output end of the cylinder to push the straw bale.

[0025] As can be seen from the above technical solutions, compared with the prior art, the present invention discloses a straw bale burning method and a straw bale burning biomass boiler, which have the following beneficial effects:

[0026] 1. Multi-directional feeding is realized through multiple feeding cylinders, and straw bales in multiple directions burn simultaneously. The side surfaces close to each other assist each other to achieve a temperature increase effect, making the combustion more complete.

[0027] 2. There are gaps between the combustion cavities, increasing the contact area between the air and the straw bales in the fuel cavity, enabling the straw to burn sufficiently.

[0028] 3. There is an annular cavity in the furnace body, forming an air insulation layer to reduce heat loss.

[0029] 4. The settings of the preheating section and the heat preservation section of the air inlet cylinder can make the air introduced into the inner cavity of the furnace body become hot air, playing a role in increasing the temperature, and further making the fuel burn more fully.

[0030] 5. The ash receiving device can not only discharge the ash slag to the ash falling port for subsequent cleaning, but also prevent the hot air in the furnace cavity from being discharged from the dust cleaning port, causing heat loss. Description of the Drawings

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0032] Figure 1 It is a schematic structural diagram when the feeding cylinder of a straw bale burning biomass boiler provided by the present invention is arranged in a downward inclination.

[0033] Figure 2 It is a schematic structural diagram when the feeding cylinder of a straw bale burning biomass boiler provided by the present invention is arranged horizontally.

[0034] Figure 3 It is a schematic structural diagram when a straw bale burning biomass boiler provided by the present invention is provided with a multi-layer feeding device.

[0035] In the figure: 1 - furnace body, 101 - annular cavity, 102 - ash cleaning port, 2 - feeding cylinder, 3 - combustion cavity, 301 - connecting rod, 302 - retaining net, 4 - air inlet cylinder, 401 - preheating section, 402 - heat preservation section, 5 - smoke exhaust cylinder, 6 - sealing cover, 7 - reinforcing rod, 8 - exhaust fan, 9 - ash hopper, 91 - ash discharge port, 10 - support, 11 - ash receiving flap, 12 - counterweight, 13 - fixed seat, 14 - cylinder, 15 - push plate. Specific embodiments

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0038] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] An embodiment of the present invention discloses a method for burning straw bales, including the following steps:

[0040] Step 1: The straw bales enter into a plurality of combustion cavities in the same horizontal plane through a plurality of feed cylinders in different directions;

[0041] Step 2: Air flows at the gap formed on the side where the plurality of combustion cavities are close to each other, so that the sides of the straw bales in different directions close to each other are in full contact with the air;

[0042] Step 3: Under the assistance of air combustion, the sides of the straw bales in different directions close to each other start to burn. At the same time, the sides of the straw bales close to the gap during combustion heat each other to assist combustion, so that the straw bales burn fully;

[0043] Step 4: The ashes generated after the straw near the gap burns fall along the hollow part of the combustion cavity, and the unburned part travels in the direction close to the combustion cavity under the action of thrust and continues to burn.

[0044] Through the above method, the straw bales in multiple directions burn simultaneously and heat each other, making the straw burn more fully; there is a gap between the barrier nets, so that the sides of the straw bales in different directions close to each other can be in direct contact with the air, increasing the contact area between the straw bales and the air, strengthening the combustion effect, and making it burn fully.

[0045] Embodiment 1:

[0046] See Figure 1 , this embodiment discloses a straw bale burning biomass boiler, including:

[0047] A furnace body 1;

[0048] A plurality of feed cylinders 2, which are circumferentially and evenly distributed on the circumferential side of the furnace body 1. The feed ends thereof are communicated with the outside air, and the discharge ends penetrate through the side wall of the furnace body 1 and extend downward obliquely to the middle part of the inner cavity of the furnace body 1;

[0049] Multiple hollow combustion chambers 3, with a straw bale inlet at one end of each combustion chamber 3. The straw bale inlets are connected to the discharge ends of each feed tube 2 in a one-to-one correspondence. The multiple combustion chambers 3 are all in the same horizontal plane, and there are gaps between the adjacent sides of the multiple combustion chambers 3. The combustion chambers 3 communicate with the inner cavity of the furnace body 1.

[0050] An air inlet tube 4, one end of the air inlet tube 4 communicates with the outside air, and the other end penetrates through the side wall of the furnace body 1 and extends to the middle of the inner cavity of the furnace body 1 below the combustion chamber.

[0051] An exhaust chimney 5, the exhaust chimney 5 is fixed at the top of the furnace body 1 and its inner cavity communicates with the inner cavity of the furnace body 1.

[0052] The number of feed tubes 2 can be increased or decreased according to the need for heat conversion. The shape of the cross-section of the inner wall of the feed tube 2 can be customized according to the shape of the straw bale, and can be square, circular or any other arbitrary shape. The straw bale realizes multi-side feeding through the feed tube 2 under the action of gravity. The straws entering the combustion chamber 3 burn simultaneously to play a role in mutual temperature increase and combustion assistance, improving the combustion efficiency and making the straw burn more fully.

[0053] A heat exchanger is also installed in the furnace body 1. The heat exchanger is installed on the inner wall of the furnace body 1 above the gap and is connected to the device outside the furnace body 1 that requires heat exchange through a pipeline. The heat exchanger can adopt any known form of heat exchanger such as a shell-and-tube heat exchanger, an immersed coil heat exchanger, a plate heat exchanger, etc.

[0054] To further optimize the above technical solution, a sealing cover 6 is hingedly connected to the feed end of each feed tube 2 to prevent heat leakage.

[0055] To further optimize the above technical solution, the combustion chamber 3 includes a plurality of connecting rods 301 and a retaining net 302. The plurality of connecting rods 301 are all parallel to the axial direction of the corresponding feed tube 2 and are circumferentially and evenly spaced and fixed at the discharge end of the feed tube 2. The net surface of the retaining net 302 is arranged along the height direction of the furnace body 1, and the circumferential side of one net surface is connected to the other ends of the plurality of connecting rods 301 to form the combustion chamber 3. The plurality of retaining nets 302 are in the same horizontal plane and there are gaps between their adjacent net surfaces. The straw bale enters the feed tube 2 and slides to the retaining net 302 and burns in the combustion chamber 303. The straw bales on multiple sides burn simultaneously, and the adjacent sides increase the temperature of each other, making the straw burn more fully.

[0056] The gap between the retaining nets 302 can be adjusted according to actual needs so that the adjacent sides of the straw bales can both assist combustion and allow air to pass through.

[0057] To further optimize the above technical solution, a reinforcing rod 7 is provided between two adjacent retaining nets 302. The two ends of the reinforcing rod 7 are respectively connected to the peripheries of the net surfaces of the two retaining nets 302 close to each other, preventing the retaining nets 302 from being damaged under the long-term impact of straw bales.

[0058] To further optimize the above technical solution, the air inlet duct 4 includes a preheating section 401 and a heat preservation section 402. An annular cavity 101 is formed in the furnace body 1. The preheating section 401 is arranged in the smoke exhaust duct 5 and one end thereof penetrates through the upper side wall of the smoke exhaust duct 5 to communicate with the outside air; the heat preservation section 402 is arranged in the annular cavity 101, one end thereof penetrates through the lower side wall of the smoke exhaust duct 5 to communicate with the other end of the preheating section 401, and the other end penetrates through the inner wall of the lower end of the furnace body 1 and extends to the inner cavity of the furnace body 1 below the combustion cavity 3. To better introduce air into the furnace body 1, a blower may be provided at the air inlet of the preheating section 401. The air blown out by the blower enters the preheating section 401 and is heated under the action of the hot flue gas in the smoke exhaust duct 5. The heat preservation section 402 is arranged in the annular cavity 101 for heat preservation to reduce heat dissipation. The heated air is introduced into the inner cavity of the furnace body 1 to enhance the combustion support effect.

[0059] To further optimize the above technical solution, an exhaust fan 8 is provided on the smoke exhaust duct 5 to smoothly discharge the flue gas.

[0060] To further optimize the above technical solution, an ash receiving device is further provided. The ash receiving device includes an ash hopper 9, a bracket 10 and an ash receiving flap assembly. An ash cleaning port 102 communicating the outside air with the inner cavity of the furnace body 1 is opened at the lower part of the furnace body 1, and an ash cleaning door is provided at the ash cleaning port 102. The outer wall of the upper end of the ash hopper 9 is fixed on the inner wall of the lower part of the furnace body 1. The bottom end of the ash hopper 9 extends to the corresponding ash cleaning port 102, and an ash falling port 91 is opened at the bottom end of the ash hopper 9. The bracket 10 is arranged along the height direction of the furnace body 1 and one end thereof is fixed on the outer side wall of the ash hopper 9. The ash receiving flap assembly is hinged to the other end of the bracket 10 to cover the ash falling port 91.

[0061] To further optimize the above technical solution, the ash receiving flap assembly includes an ash receiving flap 11 and a counterweight 12. The middle of the upper plate surface of the ash receiving flap 11 is hinged to the end of the bracket 10 far from the ash hopper 9, and one side end thereof can extend to the other side of the ash hopper 9 far from the bracket 10 to cover the ash falling port 91. The counterweight 12 is fixed on the lower plate surface of the ash receiving flap 11 on the side far from the ash falling port 91. Ash and slag fall onto the ash receiving flap 11 through the ash hopper 9. When the weight of the ash and slag is greater than the weight of the counterweight 12, the side of the ash receiving flap 11 close to the ash falling port 91 rotates downward around the hinge axis, and the ash and slag fall onto the inner wall of the bottom of the furnace body 1. When the ash and slag accumulate to a certain amount, they can be cleaned and taken out from the furnace cavity. The setting of the ash receiving flap 11 is beneficial to preserving the heat in the furnace body 1 and preventing heat dissipation.

[0062] Working principle: Turn on the blower and introduce air into the furnace body 1 through the air inlet tube 4. Place the first straw bale in each feeding tube. Under the action of gravity, the first straw bale enters the combustion cavity 3. Ignite the straw bale. The sides of the first straw bale close to the gap are heated and burned mutually. The ashes after combustion fall into the ash hopper 9 along the hollow part of the combustion cavity 3, that is, the gap between multiple connecting rods 301. The unburned part of the straw bale far from the gap is pushed forward under the action of gravity, so that the unburned straw bale continues to burn. Place the second straw bale. The second straw bale starts to burn with the help of the first straw bale. Continuously place straw bales to avoid interruption of combustion. During combustion, determine whether to start the exhaust fan to assist in smoke exhaust according to the actual situation. When the boiler needs to stop using, turn off the blower to stop introducing air into the furnace body 1, open the ash cleaning door and the ash receiving flap 11, so that the outside air enters the upper inner cavity of the furnace body 1 from the ash outlet, assisting the unburned straw bales to burn out and completing the combustion process.

[0063] Embodiment 2:

[0064] See Figure 2 ,

[0065] This embodiment discloses a straw bale burning biomass boiler, including:

[0066] Furnace body 1;

[0067] Multiple feeding tubes 2, which are circumferentially and evenly distributed on the peripheral side of the furnace body 1. Their feeding ends are connected to the outside air, and their discharging ends penetrate the side wall of the furnace body 1 and are horizontally arranged or extend downward at a small angle to the middle part of the inner cavity of the furnace body 1;

[0068] Multiple hollow combustion cavities 3, one end of each of the multiple combustion cavities 3 is provided with a straw bale inlet, and the straw bale inlets are respectively connected to the discharging ends of each feeding tube 2. The multiple combustion cavities 3 are all in the same horizontal plane, and there is a gap between the mutually adjacent sides of the multiple combustion cavities 3; the combustion cavity 3 is communicated with the inner cavity of the furnace body 1;

[0069] Air inlet tube 4, one end of the air inlet tube 4 is communicated with the outside air, and the other end penetrates the side wall of the furnace body 1 and extends to the middle part of the inner cavity of the furnace body 1 below the combustion cavity;

[0070] Exhaust chimney 5, which is fixed at the top of the furnace body 1 and its inner cavity is communicated with the inner cavity of the furnace body 1.

[0071] The number of the feeding tubes 2 can be increased or decreased according to the need of heat conversion. The cross-sectional shape of the inner wall of the feeding tube 2 can be customized according to the shape of the straw bale, and can be square, circular or any other shape. The straw bales enter from multiple sides through the feeding tubes 2 under the action of gravity. The straws entering the combustion cavity 3 burn simultaneously, playing a role of mutual heating and assisting combustion, improving the combustion efficiency and making the straw burn more fully.

[0072] A heat exchanger is also installed inside the furnace body 1. The heat exchanger is installed on the inner wall of the furnace body 1 above the gap and is connected to a device outside the furnace body 1 that requires heat exchange through pipelines. The heat exchanger can adopt any known form of heat exchanger such as a shell-and-tube heat exchanger, an immersed coil heat exchanger, a plate heat exchanger, etc.

[0073] To further optimize the above technical solution, a sealing cover 6 is hingedly connected to the feeding end of each feeding cylinder 2 to prevent heat leakage.

[0074] To further optimize the above technical solution, the combustion cavity 3 includes a plurality of connecting rods 301 and a retaining net 302. The plurality of connecting rods 301 are all parallel to the axial direction of the corresponding feeding cylinder 2 and are circumferentially and evenly spaced and fixed at the discharging end of the feeding cylinder 2. The mesh surface of the retaining net 302 is arranged along the height direction of the furnace body 1, and the circumferential side of one mesh surface is connected to the other ends of the plurality of connecting rods 301 to form the combustion cavity 3. The plurality of retaining nets 302 are in the same horizontal plane and there is a gap between the mutually adjacent mesh surfaces. The straw bale enters the feeding cylinder 2 and slides to the retaining net 302 and burns in the combustion cavity 303. The straw bales on multiple sides burn simultaneously, and the mutually adjacent sides heat each other, making the straw burn more fully.

[0075] The gap between the retaining nets 302 can be adjusted according to actual needs so that the mutually adjacent sides of the straw bales can both assist combustion and facilitate the passage of air.

[0076] To further optimize the above technical solution, a reinforcing rod 7 is arranged between two adjacent retaining nets 302. The two ends of the reinforcing rod 7 are respectively connected to the circumferential sides of the mutually adjacent mesh surfaces of the two retaining nets 302 to prevent damage to the retaining net 302 caused by long-term impact of the straw bales.

[0077] To further optimize the above technical solution, the air inlet pipe 4 includes a preheating section 401 and a heat preservation section 402. An annular cavity 101 is formed inside the furnace body 1. The preheating section 401 is arranged inside the smoke exhaust pipe 5 and one end of it penetrates through the upper side wall of the smoke exhaust pipe 5 to communicate with the outside air; the heat preservation section 402 is arranged inside the annular cavity 101, one end of it penetrates through the lower side wall of the smoke exhaust pipe 5 to communicate with the other end of the preheating section 401, and the other end penetrates through the lower inner wall of the furnace body 1 and extends to the inner cavity of the furnace body 1 below the combustion cavity 3. To better introduce air into the furnace body 1, a blower can be provided at the air inlet of the preheating section 401. The air blown out by the blower enters the preheating section 401 and is heated under the action of the hot flue gas in the smoke exhaust pipe 5. The heat preservation section 402 arranged inside the annular cavity 101 can perform heat preservation to reduce heat dissipation. The heated air is introduced into the inner cavity of the furnace body 1 to enhance the combustion assisting effect.

[0078] To further optimize the above technical solution, an exhaust fan 8 is provided on the smoke exhaust pipe 5 to smoothly discharge the flue gas.

[0079] In order to further optimize the above technical solution, an ash receiving device is also provided. The ash receiving device includes an ash hopper 9, a support 10, and an ash receiving flap assembly. A dust cleaning port 102 communicating the outside air with the inner cavity of the furnace body 1 is opened at the lower part of the furnace body 1. The outer wall of the upper end of the ash hopper 9 is fixed on the inner wall of the lower part of the furnace body 1. The bottom end of the ash hopper 9 extends to the corresponding dust cleaning port 102, and an ash falling port 91 is opened at the bottom end of the ash hopper 9. The support 10 is arranged along the height direction of the furnace body 1 and one end thereof is fixed on the outer side wall of the ash hopper 9. The ash receiving flap assembly is hingedly connected to the other end of the support 10 to cover the ash falling port 91.

[0080] In order to further optimize the above technical solution, the ash receiving flap assembly includes an ash receiving flap 11 and a counterweight 12. The middle of the upper plate surface of the ash receiving flap 11 is hingedly connected to the end of the support 10 away from the ash hopper 9, and one side end thereof can extend to the other side of the ash hopper 9 away from the support 10 to cover the ash falling port 91. The counterweight 12 is fixed on the lower plate surface of the ash receiving flap 11 on the side away from the ash falling port 91. Ash and slag fall onto the ash receiving flap 11 through the ash hopper 9. When the weight of the ash and slag is greater than the weight of the counterweight 12, the side of the ash receiving flap 11 close to the ash falling port 91 rotates downward around the hinge axis, and the ash and slag fall onto the inner wall of the bottom of the furnace body 1. When the ash and slag accumulate to a certain amount, they can be cleaned and taken out from the furnace cavity. The setting of the ash receiving flap 11 is beneficial to preserving the heat in the furnace body 1 and preventing heat dissipation.

[0081] When the feed cylinder 2 is horizontally arranged or has a small downward inclination angle, since it cannot slide into the combustion cavity by its own gravity, a pushing device is also provided. The pushing device includes a fixed seat 13, a cylinder 14, and a push plate 15. The fixed seat 13 is fixed on the ground near the feed end of the feed cylinder 2. The cylinder 14 is coaxially arranged with the feed cylinder 2 and fixed on the fixed seat 13. The push plate 15 is fixed on the output end of the cylinder 14 to push the straw bale.

[0082] Working principle: Turn on the blower to introduce air into the furnace body through the air inlet cylinder 4. Push the first straw bale into the combustion cavity 3 through the cylinder 14, ignite the straw bale. The side of the first straw bale close to the gap starts to burn, and the ashes after combustion fall into the ash hopper 9 along the hollow part of the combustion cavity 3, that is, the gaps between multiple connecting rods 301. The piston of the cylinder pushes the unburned part of the straw bale away from the gap forward. The unburned straw bale continues to burn. The piston of the cylinder withdraws from the feed cylinder, and the second straw bale is put in. The second straw bale starts to burn with the help of the first straw bale, and the straw bales are continuously put in according to the above process. During combustion, determine whether to start the exhaust fan 8 to assist in smoke exhaust according to the actual situation. When the boiler needs to stop using, after the piston of the cylinder withdraws from the feed cylinder, turn off the cylinder, and at the same time turn off the blower to stop introducing air into the furnace body 1. Open the ash cleaning door and the ash receiving flap 11 to allow the outside air to enter the upper inner cavity of the furnace body 1 from the ash falling port, assisting the unburned straw bales to burn out and completing the combustion process.

[0083] Example 3:

[0084] Refer to Figure 3 , this embodiment provides a straw bale burning biomass boiler, including:

[0085] Furnace body 1;

[0086] Multiple layers of feeding devices arranged at intervals along the height direction of the furnace body 1, each layer of feeding device includes a plurality of feeding cylinders 2, the plurality of feeding cylinders 2 are circumferentially arranged at intervals on the circumferential side of the furnace body 1, its feeding end is communicated with the outside air, and the discharging end penetrates through the side wall of the furnace body 1 and extends to the middle part of the inner cavity of the furnace body 1;

[0087] A plurality of hollow combustion cavities 3, one end of the plurality of combustion cavities 3 is provided with a straw bale feeding port, and the straw bale feeding ports are connected to the discharging ends of the feeding cylinders 2 in one-to-one correspondence. The plurality of combustion cavities 3 corresponding to the plurality of feeding cylinders 2 in each layer are all in the same plane and there is a gap between the mutually adjacent sides of the combustion cavities 3 to form a gap; the plurality of combustion cavities 3 are all communicated with the inner cavity of the furnace body 1;

[0088] Air inlet cylinder 4, one end of the air inlet cylinder 4 is communicated with the outside air, and the other end penetrates through the side wall of the furnace body 1 and extends to the middle part of the inner cavity of the furnace body 1 below the bottom combustion cavity;

[0089] Smoke exhaust cylinder 5, the smoke exhaust cylinder 5 is fixed at the top of the furnace body 1 and its inner cavity is communicated with the inner cavity of the furnace body 1.

[0090] By setting multiple layers of feeding devices and combustion cavities 3, the temperature inside the furnace body 1 is increased.

[0091] In this embodiment, the inclination direction of the discharging end of the feeding cylinder 2 refers to Embodiment 1 or Embodiment 2, and the corresponding other structural settings are also the same as those in the corresponding embodiment.

[0092] The straw bale burning biomass boiler of the present invention can be used to burn bailed straw bales. Through multi-side feeding in opposite directions, the straw bale packages are timely replenished according to the combustion consumption speed. Each combustion chamber corresponds to each other to achieve the effect of mutual temperature increase. The gap is convenient for ventilation and combustion assistance, and the combustion is sufficient, reducing the discharge amount of flue gas and waste residue, which is green and environmentally friendly.

[0093] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description in the method part.

[0094] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for burning straw bales, characterized in that, Including the following steps: Step 1: The straw bales enter into a plurality of combustion cavities in the same horizontal plane through a plurality of feeding cylinders in different directions; Step 2: Air flows at the gap formed on the side where the plurality of combustion cavities are close to each other, so that the sides of the straw bales in different directions close to each other are in full contact with the air; Step 3: Under the assistance of air combustion, the sides of the straw bales in different directions close to each other start to burn. At the same time, the sides of the straw bales close to the gap during combustion increase the temperature and assist combustion with each other, so that the straw bales burn fully; Step 4: The ashes generated after the straw near the gap burns fall along the hollow part of the combustion cavity, and the unburned part travels in the direction close to the combustion cavity under the action of thrust and continues to burn.

2. A straw bale burning biomass boiler, characterized in that, Including: A furnace body (1); A plurality of feeding cylinders (2), the plurality of feeding cylinders (2) are circumferentially arranged at intervals on the periphery of the furnace body (1), the feeding end of which is communicated with the outside air, and the discharging end penetrates through the side wall of the furnace body (1) and extends to the middle part of the inner cavity of the furnace body (1); A plurality of hollow combustion cavities (3), one end of each of the plurality of combustion cavities (3) is provided with a straw bale inlet, the straw bale inlets are connected to the discharging ends of the feeding cylinders (2) in one-to-one correspondence, the plurality of combustion cavities (3) are all in the same plane and there is a gap between the sides of the combustion cavities (3) close to each other; the plurality of combustion cavities (3) are all communicated with the inner cavity of the furnace body (1); An air inlet cylinder (4), one end of the air inlet cylinder (4) is communicated with the outside air, and the other end penetrates through the side wall of the furnace body (1) and extends to the middle part of the inner cavity of the furnace body (1) below the combustion cavity; A smoke exhaust cylinder (5), the smoke exhaust cylinder (5) is fixed at the top of the furnace body (1) and the inner cavity thereof is communicated with the inner cavity of the furnace body (1).

3. The straw bale combustion biomass boiler according to claim 2, wherein A sealing cover (6) is hingedly connected to the feeding end of each feeding cylinder (2).

4. The straw bale combustion biomass boiler according to claim 2, characterized in that, The combustion cavity (3) includes a plurality of connecting rods (301) and a net (302), the plurality of connecting rods (301) are all parallel to the axial direction of the corresponding feeding cylinder (2) and are circumferentially and uniformly arranged at intervals at the discharging end of the feeding cylinder (2), the net surface of the net (302) is arranged along the height direction of the furnace body (1), and the periphery of one net surface is connected to the other ends of the plurality of connecting rods (301) to form the combustion cavity (3), the plurality of nets (302) are all in the same horizontal plane and there is the gap between the net surfaces close to each other.

5. The straw bale combustion biomass boiler according to claim 4, characterized in that, A plurality of reinforcing rods (7) are arranged between every two adjacent nets (302), and two ends of each reinforcing rod (7) are respectively connected to the net surfaces close to each other of the two adjacent nets (302).

6. The straw bale burning biomass boiler according to claim 2, characterized in that, The air inlet duct (4) includes a preheating section (401) and a heat preservation section (402). An annular cavity (101) is formed in the furnace body (1). The preheating section (401) is arranged in the exhaust duct (5), and one end thereof penetrates through the upper side wall of the exhaust duct (5) to communicate with the outside air; the heat preservation section (402) is arranged in the annular cavity (101), one end thereof penetrates through the lower side wall of the exhaust duct (5) to communicate with the other end of the preheating section (401), and the other end penetrates through the inner wall of the lower end of the furnace body (1) and extends into the inner cavity of the furnace body (1) below the gap.

7. A straw bale burning biomass boiler according to claim 2, characterized in that, A smoke exhaust machine (8) is provided on the exhaust duct (5).

8. A straw bale burning biomass boiler according to claim 2, wherein, An ash receiving device is further provided. The ash receiving device includes an ash hopper (9), a bracket (10) and an ash receiving flap assembly. An ash cleaning port (102) communicating the outside air with the inner cavity of the furnace body (1) is formed in the lower part of the furnace body (1). The outer wall of the upper end of the ash hopper (9) is fixed on the inner wall of the lower part of the furnace body (1). The bottom end of the ash hopper (9) extends to the position corresponding to the ash cleaning port (102), and an ash dropping port (91) is formed at the bottom end of the ash hopper (9). The bracket (10) is arranged along the height direction of the furnace body (1), and one end thereof is fixed on the outer side wall of the ash hopper (9). The ash receiving flap assembly is hinged to the other end of the bracket (10) to cover the ash dropping port (91).

9. The straw bale burning biomass boiler according to claim 8, characterized in that, The ash receiving flap assembly includes an ash receiving flap (11) and a counterweight (12). The middle part of the upper plate surface of the ash receiving flap (11) is hinged to the end of the bracket (10) far from the ash hopper (9), and one side end thereof can extend to the other side of the ash hopper (9) far from the bracket (10) to cover the ash dropping port (91). The counterweight (12) is fixed on the lower plate surface of the ash receiving flap (11) on the side far from the ash dropping port (91).

10. The straw bale combustion biomass boiler according to claim 2, characterized in that, A pushing device is further provided at the feeding end of each feeding cylinder (2). The pushing device includes a fixed seat (13), a cylinder (14) and a pushing plate (15). The fixed seat (13) is fixed on the ground near the feeding end of the feeding cylinder (2). The cylinder (14) is coaxially arranged with the feeding cylinder (2) and fixed on the fixed seat (13). The pushing plate (15) is fixed on the output end of the cylinder (14) to push the straw bale.

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