Biomass fuel heating stove and heating equipment capable of realizing heat recovery and utilization

Abstract

The present invention relates to the technical field of heating equipment, and in particular to a biomass fuel heating stove and heating equipment capable of realizing heat recovery and utilization. The heating stove comprises a furnace body, a furnace, a combustion device, and a smoke exhaust system. The combustion device comprises a flame retardant cover for limiting the size of the combustion flame to extend the combustion time, and also comprises a waste heat recovery device for recovering heat from the smoke exhaust system. The waste heat recovery device comprises a shell and a heat sink provided in the shell. An air inlet is provided on one side of the shell, and an air outlet is provided corresponding to the air inlet. The heating equipment comprises a box body connected to the warm air outlet, and a heat sink connected to the box body for dissipating the heat in the box body to the room. The box body is connected to the heat sink through a heat supply component. The present invention can extend the fuel combustion time and recover the waste heat in the smoke exhaust chamber. The waste heat recovery is combined with the extension of the combustion time, thereby improving the waste heat recovery efficiency and heat utilization rate, achieving good heating effect, and being environmentally friendly and energy-saving.

Description

Technical Field

[0001] The present invention relates to the technical field of heating equipment, and in particular to a biomass fuel heating stove and heating equipment capable of realizing heat recovery and utilization. Background Art

[0002] With the development of economy, the improvement of people's living standard and the enhancement of environmental awareness, people begin to choose clean and pollution-free heating products. Where there is gas, they choose gas boilers, and where there is no gas, they choose oil boilers or electric boilers for heating. Coal-fired heating furnaces are still available in rural areas, but they are rare in cities. A heating boiler refers to a thermal energy equipment that uses coal, oil, gas, power electricity and other fuels as heating sources to heat water or other media to a certain temperature through pumps, valves and radiators to exchange heat with the local environment to achieve the purpose of heating. A heating furnace is also called a heating furnace, which is the abbreviation of a heating boiler. It is a kind of civilian boiler. It mainly refers to a normal pressure boiler that can meet people's heating needs. It belongs to the category of civilian hot water boilers.

[0003] Biomass pellet heating stove is a new generation of environmentally friendly heating equipment, which can replace the traditional coal-fired heating method. The biomass pellet fuel used has both environmental advantages and economic benefits compared with traditional fuels. At present, the combustion heating principle of all biomass pellet heating stoves on the market is the same. The heating stove is composed of a blower motor, an induced draft motor, a feed motor, an intelligent computer control panel, a combustion chamber, and a storage hopper. It adopts a negative pressure combustion method. The combustion chamber and the blower heating chamber are separated. The exhaust gas from the combustion is discharged to the outside through the motor, and the heat energy of the heating chamber is sent to the room through the fan, thereby realizing the separation of combustion and heating, increasing safety, and being more environmentally friendly and efficient. However, the exhaust system of the traditional heating stove has almost no waste heat utilization rate, resulting in a considerable amount of heat and smoke being discharged to the outside together, causing unnecessary waste and heat loss, increasing fuel costs and low heating efficiency. However, the exhaust system of the traditional pellet heating stove is discharged to the outside by a special exhaust motor. Although the exhaust effect is good, the waste heat is also discharged to the outside with the air outlet, resulting in large heat loss.

[0004] Patent CN 207622118 U discloses a waste heat recovery system for exhaust gas of a radiant heating heater, including a waste heat recovery box, the waste heat recovery box including an outer shell, the inner cavity of the outer shell is divided into an outside air inlet cavity, a heat exchange cavity and a hot air outlet cavity by two groups of partitions, the outside air inlet cavity is connected to the outside through an outside air inlet pipe, a heat exchanger is arranged inside the heat exchange cavity, the heat exchanger includes a connecting pipe, a cavity circular plate and a heat exchange pipe, the upper part of the heat exchange cavity is connected to the outside through an exhaust gas discharge pipe, and the lower part of the heat exchange cavity is connected to the outlet of the radiant heating heater through a waste heat recovery pipe. Patent CN 207962728 U discloses a combustion furnace, which includes a furnace body, an ash box is arranged at the bottom of the furnace body, a furnace cover is arranged at the top of the furnace body, a furnace is arranged inside the furnace body, and a smoke exhaust pipe connected to the furnace is arranged on the side of the furnace body. The furnace body includes a lower cylindrical base, and an inner shell and an outer shell fixed to the top of the cylindrical base. The inner shell is sleeved inside the outer shell, and an oxygen distribution chamber is formed between the inner shell and the outer shell, and the air outlet of the fan is connected to the oxygen distribution chamber; a plurality of rows of guide plates are fixed on the inner wall of the outer shell in a circumferential direction, and a plurality of oxygen distribution holes are opened on the inner shell.

[0005] Patent CN 206973624 U discloses a novel biomass pellet energy-saving and environmentally friendly hot water heating stove, comprising a combustion chamber and an induced draft cavity, wherein an induced draft cavity is provided below the combustion chamber, and a first inner cavity and a second inner cavity are fixedly welded above the combustion chamber, wherein the induced draft cavity is connected to the first inner cavity through the combustion chamber, and the second inner cavity is connected to the combustion chamber through the first inner cavity, and an induced draft fan is fixedly provided inside the induced draft cavity, and the induced draft fan is connected to the second inner cavity through the first inner cavity, and a fire cover is provided on the first inner cavity, and the fire cover is connected to the combustion chamber through the first inner cavity, and a smoke chamber is fixedly provided behind the first inner cavity, and the smoke chamber is connected to the induced draft cavity through the first inner cavity.

[0006] Patent CN 207622118 U and Patent CN 206973624 U both increase the flue gas waste heat recovery efficiency by lengthening the flue gas stroke. However, when the combustion time remains unchanged, the increase in the flue gas stroke can only increase the flue gas waste heat recovery efficiency to a small extent, and the waste heat recovery efficiency is relatively low. Although Patent CN 207962728 U accelerates the flow rate of the airflow into the furnace through the coordination of the guide plate and the oxygen distribution hole to form a vortex, which provides sufficient oxygen for CO combustion and prolongs the combustion time of CO in the furnace, so that CO is fully burned to improve energy utilization, it does not collect and reuse part of the heat in the exhaust pipe and the ash box, resulting in partial heat loss, low heat utilization, and increased fuel usage. Summary of the invention

[0007] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a biomass fuel heating stove and heating equipment with a simple structure, which can extend the combustion time of the fuel and recover the waste heat in the ash, and has a high waste heat recovery efficiency and a good heating effect and can realize heat recovery and utilization.

[0008] The technical solution adopted by the present invention to achieve the above-mentioned purpose is: a biomass fuel heating stove that can realize heat recovery and utilization, including a furnace body, a furnace arranged in the furnace body, a combustion device arranged in the furnace, and a smoke exhaust system for discharging the ash of the biomass fuel to the outside through a curved smoke exhaust channel. The combustion device includes a furnace core arranged at the bottom of the furnace and a flame retardant cover placed above the furnace core for limiting the size of the combustion flame to extend the flame residence time. It also includes a waste heat recovery device for recovering the waste heat carried away by the ash in the smoke exhaust channel. The waste heat recovery device includes a shell sealed on all sides and a heat sink for absorbing heat in the shell. An air inlet for air to enter the shell is opened on one side surface of the shell, and an air outlet for air to flow out to the room after heat transfer is completed is provided corresponding to the air inlet. The air inlet and the air outlet are arranged near the end faces of the shell at both ends, and also include a blower arranged at the air inlet for quickly sending air into the shell.

[0009] The above-mentioned biomass fuel heating stove that can realize heat recovery and utilization, the heat sink is spirally arranged and forms a spiral inner cavity. The smoke exhaust channel passes through the spiral inner cavity, one end extends to the outdoors, and the other end is connected to the furnace. The diameter of the spiral inner cavity is slightly larger than the diameter of the smoke exhaust channel. The two ends and the inner wall of the heat sink are fixedly connected to the shell by welding, the heat sink is fixedly connected to the outer wall of the smoke exhaust channel, and one end face of the shell is fixedly connected to the furnace body by welding. The length of the shell is set according to the horizontal length of the smoke exhaust channel, and the heat sink includes a heat pipe.

[0010] The above-mentioned biomass fuel heating stove capable of realizing heat recovery and utilization, the plurality of heat sinks are arranged to form a heat absorbing frame with an inner cavity according to the shape of the smoke exhaust channel, the smoke exhaust channel passes through the inner cavity, one end extends to the outdoors, and the other end is connected to the furnace, the diameter of the inner cavity is slightly larger than the diameter of the smoke exhaust channel, the two ends and the inner wall of the heat absorbing frame are fixedly connected to the shell by welding, the heat absorbing frame is fixedly connected to the outer wall of the smoke exhaust channel, one end face of the shell is fixedly connected to the furnace body by welding, the length of the shell is set according to the horizontal length of the smoke exhaust channel, and the heat sink includes a heat pipe.

[0011] The above-mentioned biomass fuel heating stove capable of realizing heat recovery and utilization, the flame-blocking hood includes a side wall, a top plate fixed above the side wall, a flame inlet port located below the side wall, and a partition plate arranged between the flame inlet port and the top plate, and also includes a flame outlet hole for impacting and crushing the ash.

[0012] The above-mentioned biomass fuel heating stove that can realize heat recovery and utilization, the flame holes include a plurality of lower flame holes opened through the partition and a plurality of upper flame holes opened through the top plate, the lower flame holes and the upper flame holes are arranged alternately, the lower flame holes and the upper flame holes are circular, rectangular or irregular in shape, and the side walls, top plate and partition are all stainless steel plates.

[0013] The above-mentioned biomass fuel heating stove capable of realizing heat recovery and utilization has a supporting device fixed at the lower end of the flame arrester hood for supporting the flame arrester hood above the furnace core, and the supporting device is a cylindrical support leg welded to the bottom of the side wall of the flame arrester hood.

[0014] The above-mentioned biomass fuel heating stove capable of realizing heat recovery and utilization, has a heat conducting plate arranged in the furnace, and the heat conducting plate divides the furnace from bottom to top into a combustion chamber and a heating chamber for temporarily storing the heat transferred from the combustion chamber through the heat conducting plate. The heating stove also includes a storage hopper connected to the combustion chamber for providing fuel to the combustion chamber, an air supply device for delivering warm air in the heating chamber to the indoor room, and a display panel for displaying parameter settings, and the air supply device includes an air supply motor and a warm air outlet.

[0015] A biomass fuel heating device capable of realizing heat recovery and utilization comprises a box body connected to a warm air outlet for collecting warm air, a heat dissipation device connected to the box body for dissipating the heat in the box body to the room, and the box body is connected to the heat dissipation device through a heat delivery component.

[0016] The above-mentioned biomass fuel heating equipment capable of realizing heat recovery and utilization has a water tank provided in the box body, and a warm air chamber is formed between the box body and the water tank. The heat dissipation device includes a radiator, and the heat delivery component includes a circulating delivery pipeline for transporting water in the water tank to the heat dissipation device and returning water in the heat dissipation device to the water tank, and a water pump provided on the circulating delivery pipeline, and a water filling port is provided on the water tank.

[0017] The above-mentioned biomass fuel heating equipment that can realize heat recovery and utilization, the heat dissipation device includes a heating cabinet with a warm air outlet window, a plurality of cabinet heat dissipation pipes connected to the heat supply component and an exhaust fan that quickly transports the heat of the cabinet heat dissipation pipe to the warm air outlet window are arranged in the heating cabinet, a plurality of heat dissipation holes are arranged on the cabinet heat dissipation pipe, and the heat supply component includes a heating delivery pipe connected to the box body for delivering warm air to the heat dissipation device.

[0018] The beneficial effects of the biomass fuel heating stove and heating equipment that can realize heat recovery and utilization of the present invention are as follows: the present invention, by providing a flame-retardant hood, plays a role in delaying and equalizing the burning flame, avoiding the situation of rapid heat loss caused by excessive flame when the fuel is burning, that is, controlling the flame diffusion range, prolonging the residence time of the flame in the hood, and the flame in a small range can prolong the burning time, thereby prolonging the heating time, improving the heating efficiency, reducing the amount of fuel, reducing the heating cost, and having a good environmental protection effect; the lower flame outlet holes and the upper flame outlet holes on the flame-retardant hood are arranged in a staggered manner, which can achieve the purpose of impacting and crushing the ash particles, thereby improving the heating effect and smoke emission effect. By providing a waste heat recovery device, the purpose of recovering the heat in the smoke exhaust system can be achieved, avoiding additional heat loss, and then sending the recovered waste heat to the room, thereby achieving the purpose of saving fuel. Due to the setting of the flame-retardant hood, the combustion time of the fuel is prolonged, and the heat absorption time of the waste heat recovery device is also prolonged, thereby further improving the utilization efficiency and recovery rate of thermal energy; the heating equipment of the present invention can achieve fast and uniform heating of a large space, and good comfort. The invention has a simple structure, is easy to use, has a good waste heat recovery effect, a high heat utilization rate, a good energy-saving effect, and a better heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the heating furnace structure in Example 1;

[0020] Figure 2 This is a schematic diagram of the structure of the heating furnace in Example 3;

[0021] Figure 3 This is a front view of the heating stove of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the waste heat recovery device in Example 1;

[0023] Figure 5 This is a left side view of the waste heat recovery device of Example 1;

[0024] Figure 6 This is a top view of the waste heat recovery device of Example 1;

[0025] Figure 7 This is a schematic diagram of the structure of the waste heat recovery device of Example 3;

[0026] Figure 8 This is a left side view of the waste heat recovery device of Example 3;

[0027] Fig. 9 This is a schematic diagram of the flame retardant cover structure of the present invention;

[0028] Fig.10 A top view of the flame retardant cover of the present invention;

[0029] Fig.11 This is a schematic diagram of the heating equipment structure of Example 3;

[0030] Fig.12 This is a schematic diagram of the structure of the heating equipment of Example 2. DETAILED DESCRIPTION

[0031] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments;

[0032] Example 1

[0033] like Figure 1-12 As shown, a biomass fuel heating stove capable of realizing heat recovery and utilization comprises a furnace body 1, a furnace arranged in the furnace body 1, a combustion device arranged in the furnace, and a smoke exhaust system for discharging the ash of the biomass fuel to the outside through a curved smoke exhaust channel 2, wherein the smoke exhaust channel 2 is made of a corrosion-resistant stainless steel pipe; the combustion device comprises a furnace core 3 arranged at the bottom of the furnace and a flame retardant cover 4 placed above the furnace core 3 for limiting the size of the combustion flame to extend the flame residence time, the flame retardant cover 4 delays and equalizes the heat of the combustion flame, and avoids the rapid loss of heat caused by excessive flame when the fuel is burned, that is, the flame diffusion range is controlled, and a small range of flame can extend the flame residence time, and the flame residence time is extended to achieve the extension of the combustion time, thereby extending the heating time, improving the heating efficiency, reducing the fuel consumption, and reducing the heating cost.

[0034] The flame-blocking cover 4 includes a side wall 5, a top plate 6 fixed on the top of the side wall 5, a flame inlet 29 located below the side wall 5, and a partition 7 arranged between the flame inlet 29 and the top plate 6, and also includes a flame outlet hole for impacting and crushing the ash. The flame outlet hole includes a plurality of lower flame outlet holes 8 uniformly opened on the partition 7 and a plurality of upper flame outlet holes 9 uniformly opened on the top plate 6. The lower flame outlet holes 8 and the upper flame outlet holes 9 are arranged alternately. The lower flame outlet holes 8 and the upper flame outlet holes 9 are circular in shape. The side wall, the top plate and the partition are all made of stainless steel plates. Among them, the staggered arrangement of the lower flame outlet holes 8 and the upper flame outlet holes 9 can convert the ash in the flame from large particles into small particles after colliding with the partition, the top plate, the lower flame outlet holes and the upper flame outlet holes. The small particles of ash are small in size, take away less heat, and are light in weight, which is more conducive to the discharge of all the ash to the outdoors. Therefore, the even crushing of the ash improves the heating effect and the smoke emission effect. The smoke exhaust system also includes a smoke exhaust fan 10 for quickly discharging the ash in the smoke exhaust channel 2 to the outside. The smoke exhaust fan 10 can discharge the broken small particles of ash to the outside. There is no need to collect the ash and then process it, which saves time and effort. The fuel used in the present invention is biomass particles, which can effectively reduce the emission of harmful substances and conform to the concept of environmental protection and energy saving.

[0035] A supporting device for supporting the flame retardant hood 4 above the furnace core 3 is also fixed at the lower end of the flame retardant hood 4. The supporting device is a cylindrical support leg 11 welded to the bottom of the side wall of the flame retardant hood 4, which achieves the purpose of fixing the flame retardant hood 4. The shape of the flame retardant hood 4 is rectangular.

[0036] In order to recover part of the waste heat carried away by the combustion ash in the smoke exhaust channel to reduce the purpose of heat loss, the present invention also includes a waste heat recovery device 12 for recovering the waste heat carried away by the combustion ash in the smoke exhaust channel 2. The waste heat recovery device includes a shell 13 sealed on all sides and a heat sink 14 for absorbing heat is provided in the shell 13. An air inlet 15 for air to enter the shell is provided on one side surface of the shell 13, and an air outlet 16 for air to flow out to the room after heat transfer is completed is provided corresponding to the air inlet 15. The air inlet 15 and the air outlet 16 are arranged near the end surfaces of the two ends of the shell, and also include a blower (not shown) arranged at the air inlet 15 for quickly delivering air into the shell.

[0037] The heat sink 14 is spirally arranged and forms a spiral inner cavity. The smoke exhaust channel 2 passes through the spiral inner cavity, one end extends to the outside, and the other end is connected to the furnace. The diameter of the spiral inner cavity is slightly larger than the diameter of the smoke exhaust channel 2. The two ends and the inner wall of the heat sink 14 are fixedly connected to the shell 13 by welding. The heat sink 14 is fixedly connected to the outer wall of the smoke exhaust channel 2. One end face of the shell 13 is fixedly connected to the furnace body 1 by welding. The length of the shell 13 is set according to the horizontal length of the smoke exhaust channel 2. In this embodiment, the heat sink 14 adopts a heat sink, and the heat sink adopts a copper tube with good thermal conductivity. The heat sink 14 is fixedly connected to the outer wall of the smoke exhaust channel 2 by welding. The curved setting of the smoke exhaust channel can greatly extend the residence time of the ash in the smoke exhaust channel 2. The spiral setting of the heat sink 14 can extend the heat transfer time of the heat sink 14. The combination of the two can more fully perform heat exchange, greatly improve the heat recovery rate, and then send the recovered heat back to the room, which improves the energy utilization efficiency, has a good heating effect, saves fuel, and has good practicality.

[0038] The setting of the waste heat recovery device 12 in the present invention avoids additional heat loss, and then sends the recovered waste heat to the room, thereby achieving the purpose of saving fuel. Due to the setting of the flame-blocking hood 4, the combustion time of the fuel is extended, and the heat absorption time of the waste heat recovery device 12 is also extended accordingly. The combination of the two further improves the efficiency of thermal energy use. The installation position of the waste heat recovery device in the present invention can also be inside the furnace body, and its size can be determined according to the size of the heating furnace. The waste heat recovery efficiency is proportional to the size of the waste heat recovery device.

[0039] A heat conducting plate is arranged in the furnace, which divides the furnace from bottom to top into a combustion chamber 17 and a heating chamber 18 for temporarily storing the heat transferred from the combustion chamber through the heat conducting plate, thereby realizing the separation of combustion and heating, increasing safety, and being more environmentally friendly and efficient; the present invention also includes a storage hopper connected to the combustion chamber 17 for providing fuel to the combustion chamber 17, an air supply device for delivering the warm air in the heating chamber 18 to the room, and a display panel 28 for displaying parameter settings, the air supply device includes an air supply motor (not shown) and a warm air outlet 19, and the air supply motor is arranged in the furnace body.

[0040] A biomass fuel heating device capable of realizing heat recovery and utilization comprises a box 30 connected to a warm air outlet 19 for collecting warm air, a heat dissipation device connected to the box 30 for dissipating the heat in the box 30 to the room, and the box 30 is connected to the heat dissipation device through a heat delivery component. When the indoor area is large, such as when a heating furnace is used alone for heating, the heating effect is not obvious at a position far from the heating furnace, but in order to ensure the overall heating effect of the room, some heat dissipation devices need to be added to ensure the overall heating effect of the room. A water tank 31 is provided in the box 30, and a warm air cavity 32 is formed between the box 30 and the water tank 31. The heat dissipation device comprises a radiator 20, and the heat delivery component comprises a circulation delivery pipe 21 for delivering water in the water tank 31 to the heat dissipation device and returning the water in the heat dissipation device to the water tank 31, and a water pump 35 arranged on the circulation delivery pipe 21, and a water injection port 33 is provided on the water tank. The warm air is transferred to the warm air chamber 32 in the box body 30 through the warm air outlet 19, and then transferred to the water tank 31 in the warm air chamber 32, so that the water temperature in the water tank 31 increases. Similar to the prior art, water circulates in the radiator 20 through the circulating delivery pipe 21 to transfer heat to the room.

[0041] Example 2

[0042] The same parts as those in Example 1 will not be repeated here, and the difference lies in: a biomass fuel heating device capable of realizing heat recovery and utilization, the heat dissipation device comprising a warm air cabinet 22 with a warm air outlet window 26, a plurality of cabinet heat dissipation pipes 23 connected to a heat supply component and an exhaust fan 24 for quickly transporting the heat of the cabinet heat dissipation pipes 23 to the warm air outlet window 26 are arranged in the warm air cabinet 22, a plurality of heat dissipation holes 34 are arranged on the cabinet heat dissipation pipe, the heat supply component comprises a heating air delivery pipe 25 connected to a box body 30 for transporting warm air to the heat dissipation device, the heating air delivery pipe 25 is fixedly connected to a plurality of cabinet heat dissipation pipes 23 by welding, the arrangement of a plurality of cabinet heat dissipation pipes 23 and heat dissipation holes 34 enables the warm air to be output to the warm air outlet window 26 more quickly, and the heating effect is better.

[0043] Example 3

[0044] The same parts as those in Example 2 are not described in detail herein, but the difference lies in that: a biomass fuel heating stove capable of realizing heat recovery and utilization, wherein the heat sink is a plurality of heat sinks, and the plurality of heat sinks 14 are enclosed by a heat absorption frame 27 with an inner cavity according to the outer shape of the smoke exhaust channel 2, the smoke exhaust channel 2 passes through the inner cavity, one end of the heat absorption frame 2 extends to the outdoors, and the other end is connected to the furnace, the diameter of the inner cavity is slightly larger than the diameter of the smoke exhaust channel 2, the two ends and the inner side wall of the heat absorption frame 27 are fixedly connected to the shell 13 by welding, the heat absorption frame 27 is fixedly connected to the outer wall of the smoke exhaust channel 2, one end face of the shell 13 is fixedly connected to the furnace body 1 by welding, the length of the shell 13 is set according to the horizontal length of the smoke exhaust channel 2, the heat sink 14 is a heat dissipation pipe, and the heat dissipation pipe is a copper pipe with good heat absorption effect, the heat absorption frame 27 is fixedly connected to the outer wall of the smoke exhaust channel by welding, the heat absorption frame 27 has the same outer shape as the smoke exhaust channel 2, and the outer contours of the heat absorption frame 27 and the smoke exhaust channel 2 in this embodiment are both circular; the use of a plurality of heat dissipation pipes in this embodiment can increase the heat absorption and heat dissipation area, and can further improve the waste heat recovery rate.

[0045] Example 4

[0046] The same parts of this embodiment as those of the third embodiment are not described in detail, and the difference lies in: a biomass fuel heating device capable of realizing heat recovery and utilization, the heat dissipation device comprises a warm air cabinet 22 with a warm air outlet window 26, a plurality of cabinet heat dissipation pipes 23 connected to the heat supply component and an exhaust fan 24 for quickly transporting the heat of the cabinet heat dissipation pipes 23 to the warm air outlet window 26 are arranged in the warm air cabinet 22, a plurality of heat dissipation holes 34 are arranged on the cabinet heat dissipation pipe, the heat supply component comprises a heating delivery pipe 25 connected to the box body 30 for transporting the warm air to the heat dissipation device, the heating delivery pipe 25 is fixedly connected to the plurality of cabinet heat dissipation pipes 23 by welding, the plurality of cabinet heat dissipation pipes 23 and the heat dissipation holes 34 are arranged, so that the warm air can be output to the warm air outlet window 26 more quickly, and the heating effect is better. When the room is large, the warm air cabinet can be installed far away from the heating furnace to dissipate the heat over a large range, with good heating effect, convenient use and cleaning.

[0047] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable ordinary technicians in the field to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made based on the essence of the content of the present invention should be included in the protection scope of the present invention.

Claims

1. A biomass fuel heating stove capable of realizing heat recovery, comprising a stove body, a furnace arranged in the stove body, a combustion device arranged in the furnace, and a smoke exhaust system for exhausting the ash of the biomass fuel to the outside through a curved smoke exhaust channel, characterized in that: The combustion device includes a furnace core arranged at the bottom of the furnace and a flame arrester placed above the furnace core for limiting the size of the combustion flame to extend the flame residence time, and also includes a waste heat recovery device for recovering the waste heat carried away by the combustion ash in the smoke exhaust channel. The waste heat recovery device includes a shell sealed on all sides and a heat sink for absorbing heat is arranged in the shell, an air inlet for air to enter the shell is opened on one side surface of the shell, and an air outlet is arranged corresponding to the air inlet for the air to flow out to the room after the heat transfer is completed, the air inlet and the air outlet are arranged near the end surfaces of the two ends of the shell, and also includes a blower arranged at the air inlet for quickly sending air into the shell; the flame arrester includes side walls, a top plate fixed above the side walls, a flame inlet located below the side walls, and a partition arranged between the flame inlet and the top plate, and also includes a blower for impact crushing Flame outlet holes for burning ash; the flame outlet holes include a plurality of lower flame outlet holes penetrated through the partition and a plurality of upper flame outlet holes penetrated through the top plate, the lower flame outlet holes and the upper flame outlet holes are arranged alternately, the lower flame outlet holes and the upper flame outlet holes are circular, rectangular or irregular in shape, the side walls, top plate and partition are all stainless steel plates; the heat sink is spirally arranged and forms a spiral inner cavity, the smoke exhaust channel passes through the spiral inner cavity, one end extends to the outdoors, and the other end is connected to the furnace, the diameter of the spiral inner cavity is slightly larger than the diameter of the smoke exhaust channel, the two ends and the inner wall of the heat sink are fixedly connected to the shell by welding, the heat sink is fixedly connected to the outer wall of the smoke exhaust channel, one end face of the shell is fixedly connected to the furnace body by welding, the length of the shell is set according to the horizontal length of the smoke exhaust channel, and the heat sink includes a heat pipe.

2. The biomass fuel heating stove capable of realizing heat recovery and utilization according to claim 1 is characterized in that: There are multiple heat sinks, which form a heat-absorbing frame with an inner cavity according to the shape of the smoke exhaust channel. The smoke exhaust channel passes through the inner cavity, one end extends to the outdoors, and the other end is connected to the furnace. The diameter of the inner cavity is slightly larger than the diameter of the smoke exhaust channel. The two ends and the inner wall of the heat-absorbing frame are fixedly connected to the shell by welding. The heat-absorbing frame is fixedly connected to the outer wall of the smoke exhaust channel. One end face of the shell is fixedly connected to the furnace body by welding. The length of the shell is set according to the horizontal length of the smoke exhaust channel. The heat sink includes a heat pipe.

3. The biomass fuel heating stove capable of realizing heat recovery and utilization according to claim 1 is characterized in that: A supporting device for supporting the flame arrester above the furnace core is also fixed at the lower end of the flame arrester. The supporting device is a cylindrical leg welded to the bottom of the side wall of the flame arrester.

4. The biomass fuel heating stove capable of realizing heat recovery and utilization according to claim 1 is characterized in that: A heat conducting plate is arranged in the furnace, and the heat conducting plate divides the furnace from bottom to top into a combustion chamber and a heating chamber for temporarily storing heat transferred from the combustion chamber through the heat conducting plate. The furnace also includes a storage hopper connected to the combustion chamber for providing fuel to the combustion chamber, an air supply device for delivering warm air in the heating chamber to the room, and a display panel for displaying parameter settings, and the air supply device includes an air supply motor and a warm air outlet.

5. A biomass fuel heating device capable of realizing heat recovery, the heating device comprising a biomass fuel heating stove capable of realizing heat recovery according to any one of claims 1 to 4, characterized in that: It also includes a box body connected to the warm air outlet for collecting warm air, and a heat dissipation device connected to the box body for dissipating the heat in the box body to the room, and the box body is connected to the heat dissipation device through a heat supply component.

6. The biomass fuel heating equipment capable of realizing heat recovery and utilization according to claim 5 is characterized in that: A water tank is provided in the box body, and a warm air cavity is formed between the box body and the water tank. The heat dissipation device includes a radiator. The heat supply component includes a circulating conveying pipeline for conveying water in the water tank to the heat dissipation device and returning water in the heat dissipation device to the water tank, and a water pump provided on the circulating conveying pipeline. A water filling port is provided on the water tank.

7. The biomass fuel heating equipment capable of realizing heat recovery and utilization according to claim 5 is characterized in that: The heat dissipation device includes a heater cabinet with a warm air outlet window, a plurality of cabinet heat dissipation pipes connected to a heat supply component and an exhaust fan for quickly transporting the heat of the cabinet heat dissipation pipes to the warm air outlet window are arranged in the heater cabinet, a plurality of heat dissipation holes are arranged on the cabinet heat dissipation pipe, and the heat supply component includes a heating delivery pipe connected to a box body for transporting heated air to the heat dissipation device.

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