Biomass particle fireplace based on thermoelectric power generation

Abstract

The utility model relates to the technical field of biomass fuel equipment. A biomass particle fireplace based on thermoelectric power generation comprises a fireplace body, the surface of the fireplace body is provided with a hearth, a feeding port and a charging box, the charging box is placed at the bottom of the hearth, a plurality of heat dissipation pipes are arranged above the hearth, and a thermoelectric power generation assembly, a feeding assembly and a smoke exhaust preheating assembly are arranged in the fireplace body. The hearth is matched with the feeding assembly to conduct continuous combustion heating. According to the biomass particle fireplace based on thermoelectric power generation, self power generation and power supply can be carried out through the internal and external temperature difference during fireplace combustion, heat energy of the fireplace is converted into electric energy, the heat supply requirement can be met, meanwhile, the comprehensive utilization rate of combustion can be increased, and self power supply of fireplace equipment is achieved. The technical problems that in the prior art, part of heat of an existing biomass fireplace is wasted, the fuel utilization rate is reduced, fireplace equipment needs to be supported by an external power source and is limited by electric power supply, and use inconvenience is increased are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of biomass fuel equipment, and particularly relates to a biomass particle fireplace based on thermoelectric power generation. BACKGROUND

[0002] The fireplace is widely used as a heating device due to its safety, high efficiency and ornamental value. The traditional biomass particle fireplace generates heat by burning biomass particles, which is used for indoor heating or industrial heating. However, part of the heat is absorbed by the furnace wall and is not effectively exchanged with the outside, resulting in waste of heat energy and reduction of fuel utilization efficiency.

[0003] In addition, the existing fireplace design usually fails to effectively recover the waste heat in the flue gas, resulting in waste of heat. If the waste heat in the flue gas can be effectively utilized to preheat the inlet air, not only the flue gas emission temperature can be reduced, but also the combustion efficiency can be improved, further improving the thermal efficiency and environmental protection performance of the fireplace.

[0004] With the popularization of electrification technology, users' demand for fireplaces gradually diversifies, such as the need to drive electrical equipment such as exhaust fan and air blower. However, these devices usually need external power supply, and in remote areas or mobile environments, due to the limitation of power supply, the use is inconvenient, so it is necessary to improve. SUMMARY

[0005] The present application provides a biomass particle fireplace based on thermoelectric power generation, which can generate electricity by the temperature difference inside and outside the fireplace during combustion, convert the heat energy of the fireplace into electrical energy, meet the demand for heating, improve the comprehensive utilization rate of combustion, realize the self-power supply of the fireplace equipment, reduce the dependence on external power supply, and improve the applicability in different environments. The technical problem of the prior art that part of the heat of the biomass fireplace is wasted, the fuel utilization rate is reduced, the thermal efficiency and environmental protection performance of the fireplace need to be improved, and the fireplace equipment needs external power supply, which is limited by power supply in remote areas or mobile environments, and increases the inconvenience of use is solved.

[0006] The above technical problem of the present application is solved by the following technical scheme: a biomass particle fireplace based on thermoelectric generation, comprising a fireplace main body, a hearth, a feeding port and a charging box are arranged on the surface of the fireplace main body, the charging box is placed at the bottom of the hearth, a plurality of heat dissipation pipes for heating air are arranged above the hearth, a thermoelectric generation assembly, a feeding assembly and a smoke preheating assembly are arranged in the fireplace main body, and the hearth and the feeding assembly cooperate to continuously combust and generate heat. A large amount of heat is generated by combustion of biomass particles in the hearth in the fireplace main body, the thermoelectric generation assembly generates electricity by utilizing the temperature difference between the inside and outside of the fireplace, and the heat energy of the fireplace is converted into electric energy to drive other devices or electrical equipment. On the one hand, the waste of heat is reduced, and the comprehensive utilization rate of fuel is improved. On the other hand, the fireplace equipment is self-powered, the dependence on external power supply is reduced, and the applicability of the fireplace in remote areas or mobile scenarios is improved.

[0007] As a preferred, the thermoelectric generation assembly comprises thermoelectric generation sheets fixed on the outer wall of the hearth of the fireplace main body, and heat dissipation fins are arranged on the outside of the thermoelectric generation sheets. The heat energy in the fireplace is converted into electric energy to drive various loads by utilizing the temperature difference. When the fireplace main body is working, a large amount of heat is generated by combustion of biomass particles in the storage tank in the hearth, the temperature of the outer wall of the hearth rises, one side of the thermoelectric generation sheets attached to the outer wall of the hearth is in a high-temperature state, and the other side is rapidly heat-exchanged by the heat dissipation fins. After a temperature difference is formed between the two sides of the thermoelectric generation sheets, a voltage is generated between the two sides of the thermoelectric generation sheets according to the Seebeck effect, and the electric energy generated by the thermoelectric generation sheets is transmitted to the load through the wires.

[0008] As a preferred, a layer of silicone grease is filled between the thermoelectric generation sheets and the heat dissipation fins. The silicone grease layer can rapidly transfer the heat of the thermoelectric generation sheets to the heat dissipation fins, and improve the power generation capacity of the thermoelectric generation sheets.

[0009] As a preferred, the feeding assembly comprises a storage tank fixed in the fireplace main body, a spiral conveyor and a feeding motor are arranged at the outlet below the storage tank, a feeding pipeline is arranged at the discharge end of the spiral conveyor, and the feeding pipeline is communicated with the hearth. After the feeding motor is started, the driving motor drives the spiral conveyor to rotate, the biomass particles in the storage tank are fed into the hearth through the feeding pipeline and the feeding port, and finally fall into the charging box for residual combustion, so that uninterrupted fuel supply is realized in the hearth.

[0010] Preferably, the smoke preheating assembly comprises a smoke exhaust fan and a blower fixed in the fireplace body, the blower is connected with the heat dissipation pipe; the bottom of the fireplace body is transversely provided with a smoke exhaust pipe and an air inlet pipeline, the fireplace body is longitudinally provided with a smoke recovery channel and an air backflow channel, and the smoke recovery channel is connected with the smoke exhaust fan.

[0011] Preferably, the smoke recovery channel and the air backflow channel are staggered. The smoke recovery channel and the air backflow channel are staggered, the heat of the smoke is used to preheat the backflow air, the temperature of the air entering the hearth can be increased, and the combustion efficiency can be improved.

[0012] Preferably, the smoke preheating assembly further comprises a heat insulation plate arranged between the heat dissipation fins, a channel for circulating air is left between the heat insulation plate and the heat dissipation fins, air enters the channel through the air inlet pipeline, passes through the space between the heat insulation plate and the heat dissipation fins, rises to the top end, returns to the bottom end along the air backflow channel, and then enters the hearth from the bottom of the fireplace.

[0013] The thermoelectric generator sheet, the blower, the smoke exhaust fan and the feeding motor are connected in parallel through wires. The present application converts the heat energy of the fireplace into electric energy by utilizing the temperature difference between the inside and outside of the fireplace, which is used to drive other devices or electrical equipment. On the one hand, the waste of heat is reduced, and the comprehensive utilization rate of fuel is improved. On the other hand, the fireplace equipment is self-powered, the dependence on external power supply is reduced, and the applicability of the fireplace in remote areas or mobile scenarios is improved.

[0014] Further, the power generation method of the biomass particle fireplace based on thermoelectric power generation comprises the following steps:

[0015] Step a, when the fireplace is working, the biomass particles in the hearth produce a large amount of heat, at this time, one side of the thermoelectric generator sheet is in a high temperature state, and the other side is rapidly heat exchanged with air through the heat dissipation fins, the temperature is rapidly reduced, a temperature difference is formed, the thermoelectric generator sheet generates a voltage, and the electric energy is transmitted to the load such as the smoke exhaust fan, the blower and the feeding motor through wires.

[0016] Step b, when the blower is started, the indoor air with a lower temperature is sucked into the heat dissipation pipe, the high-temperature smoke generated by combustion in the hearth is heat exchanged with the air in the heat dissipation pipe, and the air releases indoor after absorbing heat.

[0017] Step c, when the exhaust fan is started, the high-temperature flue gas is sucked into the flue gas recovery channel after heat exchange through the heat dissipation pipe, and finally discharged to the outside by the exhaust pipe; in this process, the flue gas waste heat will preheat the air in the air backflow channel; at the same time, the air in the air backflow channel is sucked into the furnace by the exhaust fan due to the negative pressure formed in the furnace.

[0018] Step d, when the feeding motor is started, the driving motor drives the screw conveyor to rotate, and the biomass particles are transported into the feeding pipe, and enter the furnace through the feeding port, and fall into the loading box to continue to participate in combustion.

[0019] Therefore, the biomass particle fireplace based on thermoelectric power generation has the following advantages: it can generate electricity by itself through the temperature difference between the inside and outside of the fireplace, and convert the heat energy of the fireplace into electrical energy, which can not only meet the heating demand, but also improve the comprehensive utilization rate of combustion, realize self-power supply of the fireplace equipment, reduce the dependence on external power supply, and improve the applicability in different environments. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a front view structural schematic diagram of a biomass particle fireplace based on thermoelectric power generation.

[0021] Figure 2 is Figure 1 a rear view structural schematic diagram.

[0022] Figure 3 is Figure 1 an explosion structural schematic diagram of the temperature difference power generation sheet.

[0023] Figure 4 is Figure 3 a three-dimensional structural schematic diagram of the screw conveyor.

[0024] In the figure, the fireplace main body 1, the furnace 2, the feeding port 3, the loading box 4, the heat dissipation pipe 5, the temperature difference power generation sheet 6, the heat dissipation sheet 7, the storage tank 8, the screw conveyor 9, the feeding motor 10, the feeding pipe 11, the exhaust fan 12, the air blower 13, the exhaust pipe 14, the air inlet pipe 15, the flue gas recovery channel 16, the air backflow channel 17, and the heat insulation plate 18. DETAILED DESCRIPTION

[0025] The technical solutions of the application will be further specifically described below by examples and in combination with the drawings.

[0026] Example:

[0027] As Figure 1 and 2As shown in 3 and 4, a biomass particle fireplace based on thermoelectric power generation comprises a fireplace body 1, a hearth 2 and a feeding port 3 are formed on the surface of the fireplace body 1, a charging box 4 is arranged at the bottom of the hearth 2, a plurality of heat dissipation pipes 5 for heating air are arranged above the hearth 2, a thermoelectric power generation assembly, a feeding assembly and a smoke exhaust preheating assembly are arranged in the fireplace body 1, and the hearth 2 cooperates with the feeding assembly to realize uninterrupted combustion and heat generation.

[0028] The thermoelectric power generation assembly comprises thermoelectric power generation sheets 6 fixed on the outer wall of the hearth 2 of the fireplace body 1, heat dissipation fins 7 fixedly arranged on the outer side of the thermoelectric power generation sheets 6, and a layer of silicone grease filled between the thermoelectric power generation sheets 6 and the heat dissipation fins 7, so that the heat energy in the fireplace is converted into electric energy by using temperature difference to drive various loads.

[0029] The feeding assembly comprises a storage tank 8 fixed in the fireplace body 1, a spiral conveyor 9 and a feeding motor 10 arranged at the outlet below the storage tank 8, a feeding pipeline 11 arranged at the discharge end of the spiral conveyor 9, and the feeding pipeline 11 being communicated with the hearth 2.

[0030] The smoke exhaust preheating assembly comprises a smoke exhaust fan 12 and a blower 13 fixed in the fireplace body 1, and the blower 13 is connected with the heat dissipation pipes 5; a smoke exhaust pipe 14 and an air inlet pipeline 15 are transversely arranged at the bottom of the fireplace body 1, a smoke recovery channel 16 and an air backflow channel 17 are longitudinally arranged in the fireplace body 1, and the smoke recovery channel and the air backflow channel 17 are staggered; and the smoke recovery channel is connected with the smoke exhaust fan 12.

[0031] The thermoelectric power generation sheets 6, the blower 13, the smoke exhaust fan 12 and the feeding motor 10 are connected in parallel through wires.

[0032] The smoke exhaust preheating assembly further comprises a heat insulation plate 18 arranged in the space between the heat dissipation fins 7, and a channel for circulating air is formed between the heat insulation plate 18 and the heat dissipation fins 7; air enters from the air inlet pipeline 15, passes through the space between the heat insulation plate 18 and the heat dissipation fins 7, rises to the top end, returns to the bottom along the air backflow channel 17, and then enters the hearth 2 from the bottom of the fireplace.

[0033] The power generation mode of the present application is as follows:

[0034] In step a, when the fireplace is working, a large amount of heat is generated by combustion of biomass particles in the hearth 2; at this time, one side of the thermoelectric power generation sheets 6 is in a high-temperature state, and the other side is rapidly heat-exchanged with air through the heat dissipation fins 7, so that the temperature is rapidly reduced, a temperature difference is formed, the thermoelectric power generation sheets 6 generate voltage, and the electric energy is transmitted to loads such as the smoke exhaust fan 12, the blower 13 and the feeding motor 10 through wires.

[0035] In step b, when the blower 13 is started, indoor air at a lower temperature is sucked into the heat dissipation pipes 5, and the high-temperature flue gas generated by combustion in the hearth 2 is heat-exchanged with the air in the heat dissipation pipes 5, so that the air absorbs heat and is released into the room.

[0036] Step c, when the exhaust fan 12 is started, the high-temperature flue gas is sucked into the flue gas recovery channel 16 after completing heat exchange through the heat dissipation pipe 5, and is finally discharged to the outside; in this process, the flue gas waste heat preheats the air in the air backflow channel 17; at the same time, the air suction effect of the exhaust fan 12 forms a negative pressure in the furnace 2, and the air preheated by the air backflow channel 17 is sucked into the furnace 2.

[0037] Step d, when the feeding motor 10 is started, the driving motor drives the screw conveyor 9 to rotate, and the biomass particles are transported into the feeding pipe 11, and then enter the furnace 2 through the feeding port 3 and fall into the charging box 4 to continue to participate in combustion.

[0038] When the fireplace main body 1 works, a large amount of heat is generated by the biomass particles in the storage tank 8 burning in the furnace 2, the temperature of the outer wall of the furnace 2 is increased, one side of the thermoelectric element 6 attached to the outer wall of the furnace 2 is in a high-temperature state, and the other side is rapidly heat-exchanged by the heat dissipation fin 7; after the two sides of the thermoelectric element 6 form a temperature difference, a voltage is generated on the two sides of the thermoelectric element 6 according to the Seebeck effect, and the generated electric energy is transmitted to the load such as the exhaust fan 12, the air blower 13 and the feeding motor 10 through the wire.

[0039] When the air blower 13 is started, the indoor air at a lower temperature is blown into the heat dissipation pipe 5, the high-temperature flue gas generated by the combustion of the furnace 2 exchanges heat with the air in the heat dissipation pipe 5, and the air absorbs the heat of the flue gas and is released to the indoor air, thereby increasing the temperature of the room.

[0040] When the exhaust fan 12 is started, the high-temperature flue gas is sucked into the flue gas recovery channel 16 after completing heat exchange through the heat dissipation pipe 5, and is finally discharged to the outside; in this process, the flue gas recovery channel 16 and the air backflow channel 17 are arranged alternately, and the heat of the flue gas is used to preheat the backflow air; at the same time, the air suction effect of the exhaust fan 12 forms a negative pressure in the furnace 2, and the air preheated by the air backflow channel 17 is sucked into the furnace 2 to participate in combustion, which can increase the temperature of the air entering the furnace 2 and enhance the combustion efficiency.

[0041] At the same time, when the feeding motor 10 is started, the driving motor drives the screw conveyor 9 to rotate, and the biomass particles in the storage tank 8 are transported along the feeding pipe 11 to the furnace 2 through the feeding port 3, and finally fall into the charging box 4 to continue residual combustion, so that there is uninterrupted fuel supply in the furnace 2.

[0042] The load in the present application includes but is not limited to the exhaust fan 12, the air blower 13 and the feeding motor 10, and other electrical equipment can also be connected to the thermoelectric element 6 to utilize the output electric energy.

[0043] The application converts the heat energy of the fireplace into electric energy by utilizing the temperature difference between the inside and outside of the fireplace, which is used to drive other devices or electrical equipment, on the one hand, reduces the waste of heat, and improves the comprehensive utilization rate of fuel; on the other hand, realizes the self-power supply of the fireplace equipment, reduces the dependence on external power supply, and improves the applicability of the fireplace in remote areas or mobile scenarios.

[0044] The application preheats the entering air by utilizing the flue gas waste heat, which not only reduces the emission temperature of the flue gas, but also significantly improves the thermal efficiency of the fireplace.

[0045] The specific embodiments described herein are merely illustrative of the present application. Those skilled in the art can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. A biomass pellet fireplace based on thermoelectric power generation, characterized by: The fireplace body is provided with a hearth, a feeding port and a charging box, the charging box is placed at the bottom of the hearth, a plurality of heat dissipation pipes for heating air are arranged above the hearth, a thermoelectric power generation assembly, a feeding assembly and a smoke preheating assembly are arranged in the fireplace body, and the hearth and the feeding assembly cooperate to continuously combust and heat.

2. The biomass pellet stove based on thermoelectric generation according to claim 1, characterized in that: The thermoelectric power generation assembly includes thermoelectric power generation sheets fixed on the outer wall of the hearth of the fireplace body, and heat dissipation fins are arranged on the outer side of the thermoelectric power generation sheets.

3. A biomass pellet stove based on thermoelectric generation according to claim 2, characterized in that: The thermoelectric power generation sheets and the heat dissipation fins are filled with a layer of silicone grease.

4. The biomass pellet stove based on thermoelectric generation according to claim 1, characterized in that: The feeding assembly includes a storage tank fixed in the fireplace body, a spiral conveyor and a feeding motor are arranged at the outlet of the storage tank, a feeding pipeline is arranged at the discharge end of the spiral conveyor, and the feeding pipeline is communicated with the hearth.

5. The biomass pellet stove based on thermoelectric generation according to claim 1, characterized in that: The smoke preheating assembly includes a smoke exhaust fan and a blower fixed in the fireplace body, the blower is connected with the heat dissipation pipes, a smoke exhaust pipe and an air inlet pipeline are transversely arranged at the bottom of the fireplace body, a smoke recovery channel and an air backflow channel are longitudinally arranged in the fireplace body, and the smoke recovery channel is connected with the smoke exhaust fan.

6. A biomass pellet stove based on thermoelectric generation according to claim 5, characterized in that: The smoke recovery channel and the air backflow channel are staggered.

7. The biomass pellet stove based on thermoelectric generation according to claim 5, characterized in that: The smoke preheating assembly further includes a heat insulation plate arranged in parallel with the heat dissipation fins, a channel for circulating air is left between the heat insulation plate and the heat dissipation fins, air enters the channel through the air inlet pipeline, passes through the space between the heat insulation plate and the heat dissipation fins, rises to the top end, returns to the bottom end along the air backflow channel, and then enters the hearth from the bottom end of the fireplace.

8. A biomass pellet stove based on thermoelectric power generation according to any one of claims 1-7, characterized in that: The thermoelectric power generation sheets, the blower, the smoke exhaust fan and the feeding motor are connected in parallel through wires.

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