CN218295935U - Biomass heating furnace - Google Patents

Abstract

The utility model relates to a living beings heating stove, include: a bunker for storing fuel; the combustion chamber comprises an upper furnace pipe and a lower furnace pipe, and a combustion cup and an ignition mechanism are arranged in the lower furnace pipe; the feeding mechanism is used for conveying the combustion in the storage bin to the combustion cup; the air inlet mechanism is used for supplying air to the combustion chamber; the multi-stage oxygen-assisting mechanism comprises a second-stage oxygen-assisting pipe and a third-stage oxygen-assisting pipe, wherein the second-stage oxygen-assisting pipe is used for supplying oxygen to the lower furnace pipe, and the third-stage oxygen-assisting pipe is used for supplying oxygen to the upper furnace pipe; the smoke exhaust mechanism is used for exhausting smoke generated after the combustion of the combustion chamber; the utility model discloses can effectively reduce the production of smog in the biomass fuel combustion process, environmental protection more.

Description

Biomass heating furnace

Technical Field

The utility model relates to a biomass combustion furnace technical field, concretely relates to living beings heating stove.

Background

In order to prevent farmers from burning crop straws in the field to pollute the environment, the state is vigorously promoting the processing of the crop straws into biomass granular fuel. The biomass particles belong to renewable fuels, and the popularization of the biomass particles is beneficial to treating crop straws and reducing the use of non-renewable resources such as coal and the like, so the biomass particles have very ideal popularization prospect. Along with the popularization of biomass particle fuel, various biomass combustion furnaces using biomass particles as fuel are produced and developed greatly.

The currently used biomass combustion furnace can generate a large amount of smoke in the combustion process, and does not meet the current environment-friendly detection requirements, and the smoke is mainly formed by combining small solid particles generated by incomplete combustion of biomass fuel and small liquid droplets in air, so that a solution can be found from the aspect of how to completely combust the biomass fuel for solving the problem that smoke emission exceeds the standard in the combustion process of the biomass combustion furnace.

Through search, the publication numbers are: the biomass water tube boiler disclosed by the Chinese patent CN107975939A and the biomass boiler provided with the surrounding air distribution oxygen supply high-temperature combustion chamber disclosed by the Chinese patent with the publication number CN215863345U can fully combust the biomass fuel, and the combustion degree of the biomass fuel is improved in a secondary air supply mode; and the publication numbers are: CN214802248U, a biomass burner for flue-cured tobacco, which is disclosed in chinese patent, has a stepped combustion hearth, and optimizes and upgrades the hearth to disperse flame density, thereby reducing the emission of harmful gases.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a biomass heating stove that can effectively reduce smog production in the biomass fuel combustion process, environmental protection more.

The technical scheme of the utility model is realized like this: a biomass heating furnace comprising:

a bunker for storing fuel;

the combustion chamber comprises an upper furnace pipe and a lower furnace pipe, and a combustion cup and an ignition mechanism are arranged in the lower furnace pipe;

the feeding mechanism is used for conveying the combustion in the storage bin to the combustion cup;

the air inlet mechanism is used for supplying air to the combustion chamber;

the multi-stage oxygen-assisting mechanism comprises a second-stage oxygen-assisting pipe and a third-stage oxygen-assisting pipe, wherein the second-stage oxygen-assisting pipe is used for supplying oxygen to the lower furnace pipe, and the third-stage oxygen-assisting pipe is used for supplying oxygen to the upper furnace pipe;

and the smoke exhaust mechanism is used for exhausting smoke generated by the combustion chamber.

Adopt above-mentioned living beings heating stove, store the fuel in the feed bin when using, start feeding mechanism and carry the fuel in the feed bin to the burning cup in the combustion chamber, ignition mechanism makes the fuel burn in stove courage down after lighting the fuel, flame can rush into in the stove courage in the fuel combustion process, the flue gas that the burning produced also can get into in the stove courage, air inlet mechanism can supply wind in the combustion chamber and guarantee the burning of fuel in the fuel combustion process, simultaneously the oxygen suppliment is in stove courage down to the second grade helps oxygen pipe to the oxygen content in the stove courage to improve the burning of fuel down, the oxygen suppliment is assisted to the stove courage in the third grade, in order to improve the well oxygen content of stove courage, can further burn the fixed tiny granule in the flue gas like this under the effect of flame, the final surplus flue gas is discharged the combustion chamber through mechanism.

The utility model discloses further set up to: the air inlet mechanism comprises an air inlet groove and an air supply device, the air inlet groove is formed in the bottom and the side wall of the combustion cup, the air supply device is used for supplying air into the air inlet groove, and a plurality of air inlet holes communicated with the air inlet groove are formed in the inner wall and the bottom surface of the combustion cup.

The utility model discloses further set up to, feeding mechanism includes:

the first feeding pipe is provided with a feeding end and a discharging end, and a first feeding auger is arranged in the first feeding pipe;

the second feeding pipe is arranged below the first feeding pipe in parallel, is provided with a feeding end and a discharging end and is internally provided with a second feeding auger;

the feeding chamber is used for communicating the discharge end of the first feeding pipe with the feed end of the second feeding pipe;

the bottom of the storage bin is communicated with the feeding end of the first feeding pipe, and the discharging end of the second feeding pipe is communicated with the combustion cup.

The utility model discloses further set up to: the feeding speed of the second feeding auger is higher than that of the first feeding auger.

The utility model discloses further set up to: one end of the second feeding auger close to the discharge end of the second feeding pipe extends into the combustion cup.

Preferably, the following components: the inner wall of one side of the combustion cup, which is far away from the second feeding pipe, is an inclined plane which inclines upwards, and the outer wall of one side of the combustion cup, which is far away from the second feeding pipe, is an inclined plane which inclines downwards.

The utility model discloses further set up to: the anti-tempering pipe is arranged on the second feeding pipe, the anti-tempering pipe inclines towards the discharge end of the second feeding pipe, and the anti-tempering pipe can supply air to the discharge end of the second feeding pipe.

The utility model discloses further set up to, the mechanism of discharging fume includes:

a smoke return chamber;

the first end of the first smoke exhaust pipe group is communicated with the upper furnace pipe, and the second end of the first smoke exhaust pipe group is communicated with the smoke return chamber;

the side wall of the smoke exhaust chamber is provided with an air inducing device;

the first end of the second smoke exhaust pipe group is communicated with the smoke return chamber, and the second end of the second smoke exhaust pipe group is communicated with the smoke exhaust chamber;

the first smoke exhaust pipe group and the second smoke exhaust pipe group are distributed in parallel, and the flow directions of smoke in the first smoke exhaust pipe group and the second smoke exhaust pipe are opposite.

The utility model discloses further set up to: the multistage oxygen-assisting mechanism comprises two second-stage oxygen-assisting pipes and a third-stage oxygen-assisting pipe, the inlet ends of the second-stage oxygen-assisting pipes and the third-stage oxygen-assisting pipes are connected with the same air inlet pipe, the two second-stage oxygen-assisting pipes are arranged above the combustion cup in parallel, and a plurality of second-stage oxygen-assisting holes are formed in the bottom surface of the two second-stage oxygen-assisting pipes at intervals;

the outlet end of the three-stage oxygen-assisting pipe is provided with an annular end pipe, a connecting pipe is arranged between the upper furnace pipe and the lower furnace pipe, the end pipe is sleeved outside the connecting pipe, a three-stage oxygen-assisting groove is formed between the end pipe and the connecting pipe, and a plurality of three-stage oxygen-assisting holes communicated with the three-stage oxygen-assisting groove are formed in the inner wall of the connecting pipe at intervals along the circumferential direction.

The utility model discloses further set up to: a cooking bench is arranged above the upper furnace pipe, the cooking bench is communicated with the top of the upper furnace pipe, and a sealing cover is arranged between the cooking bench and the upper furnace pipe.

The utility model has the advantages as follows:

1. on the basis that the air inlet mechanism supplies air to the combustion chamber, the multistage oxygen-assisting pipes are arranged to supply oxygen to the upper furnace pipe and the lower furnace pipe, so that the combustion potential of flame in the combustion chamber is more vigorous, the height of the flame is higher, smoke at a high position can be further combusted, the concentration of the smoke discharged out of the combustion chamber is reduced, and the smoke quantity formed in the air is reduced;

2. the two feeding augers are used for feeding, the feeding precision is high, and the two feeding augers are arranged for differential feeding, so that the phenomenon of fuel accumulation cannot occur in the feeding chamber, even if fuel staying in the second feeding pipe is ignited carelessly, the fuel in the storage bin cannot be affected, and the safety is higher;

3. the anti-backfire pipe is arranged on the second feeding pipe, and air is supplied to the direction of the discharge end of the second feeding pipe through the anti-backfire pipe, so that flame in the combustion chamber is not easy to enter the second feeding pipe to ignite fuel staying in the second feeding pipe, and ash generated after the fuel is combusted is not easy to enter the second feeding pipe to cause blockage;

4. one end of the second feeding auger, which is close to the discharge end of the second feeding pipe, extends into the combustion cup, so that ash generated in the combustion cup can be continuously pushed out in the feeding process of the second feeding auger, and the phenomenon that a large amount of ash is coked in the combustion cup to block and influence the combustion of fuel is avoided;

5. through setting up smoke return chamber, first group of pipes, the second of discharging fume and discharging fume the nest of pipes, prolonged the distance of cigarette discharge in-process, be favorable to the heating stove to thermal absorption, design into the first group of pipes and the second of discharging fume the nest of pipes and be parallel and the two opposite flow direction that can supply the flue gas simultaneously, effectively restricted the volume of heating stove like this.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of a part a of the enlarged structure in fig. 1.

Fig. 3 is the perspective structure of the smoke exhausting mechanism of the present invention.

Fig. 4 is a schematic view of the first direction three-dimensional structure of the middle storage bin, the feeding mechanism, the combustion cup and the multi-stage oxygen-assisting mechanism of the present invention.

Fig. 5 is a schematic diagram of a second direction three-dimensional structure of the middle storage bin, the feeding mechanism, the combustion cup and the multi-stage oxygen-assisting mechanism of the present invention.

Fig. 6 is a schematic view of a third directional three-dimensional structure of the middle storage bin, the feeding mechanism, the combustion cup and the multi-stage oxygen-assisting mechanism of the present invention.

The labels in the figures are:

1-a storage bin, 201-a lower furnace container, 202-an upper furnace container, 3-a combustion cup, 4-an air inlet tank, 5-an air supply device, 6-a first feeding pipe, 7-a first feeding auger, 8-a second feeding pipe, 9-a second feeding auger, 10-a feeding chamber, 1101-a first anti-backfire pipe, 1102-a second anti-backfire pipe, 12-a fume return chamber, 13-a first fume exhaust pipe group, 14-a fume exhaust chamber, 15-a second fume exhaust pipe group, 16-a second oxygen-assisting pipe, 1601-a second oxygen-assisting hole, 17-a third oxygen-assisting pipe, 18-an end pipe, 19-a connecting pipe, 20-a third oxygen-assisting hole, 2101-a first air inlet pipe, 2102-a second air inlet pipe, 22-a cooking bench, 23-a sealing cover, 24-an ignition mechanism and 25-an air inducing device.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

As shown in fig. 1-6, the present embodiment discloses a biomass heating furnace, comprising: a bunker 1 for storing fuel; the combustion chamber comprises an upper furnace pipe 202 and a lower furnace pipe 201, and a combustion cup 3 and an ignition mechanism 24 are arranged in the lower furnace pipe 201; the feeding mechanism is used for conveying the combustion in the storage bin 1 to the combustion cup 3; the air inlet mechanism is used for supplying air to the combustion chamber; the multi-stage oxygen-assisting mechanism comprises a second-stage oxygen-assisting pipe 16 and a third-stage oxygen-assisting pipe 17, wherein the second-stage oxygen-assisting pipe 16 is used for supplying oxygen to the lower furnace pipe 201, and the third-stage oxygen-assisting pipe 17 is used for supplying oxygen to the upper furnace pipe 202; and the smoke exhausting mechanism is used for exhausting smoke generated by the combustion chamber.

In this embodiment: a discharge port communicated with a feeding mechanism is arranged at the bottom of the bin 1, the feeding mechanism comprises a first feeding pipe 6 and a second feeding pipe 8, the first feeding pipe 6 and the second feeding pipe 8 are arranged horizontally and in parallel, a first feeding auger 7 is arranged in the first feeding pipe 6 along the length direction of the first feeding pipe, a second feeding auger 9 is arranged in the second feeding pipe 8 along the length direction of the second feeding pipe, the first feeding auger 7 and the second feeding auger 9 are respectively driven by an external driving device, the side wall of the upper side of the first feeding pipe 6 is communicated with the discharge port, fuel in the bin 1 can enter the first feeding pipe 6 through the discharge port and is conveyed by the first feeding auger 7, the discharge port is also positioned at the feeding end of the first feeding pipe 6, a vertical feeding chamber 10 is arranged between the first feeding pipe 6 and the second feeding pipe 8, the upper end of the feeding chamber 10 is communicated with the discharge end of the first feeding pipe 6, the lower end of the feeding chamber 10 is communicated with the feeding end of the second feeding pipe 8, the fuel enters the feeding chamber 10 after being conveyed by the first feeding chamber 7, and then enters the second feeding auger 8 downwards under the action of gravity;

the combustion chamber comprises an upper furnace pipe 202 and a lower furnace pipe 201, the upper furnace pipe 202 and the lower furnace pipe 201 are used as fuel combustion places, a combustion cup 3 is arranged in the lower furnace pipe 201, the combustion cup 3 is fixed on one side, close to the feeding mechanism, of the lower furnace pipe 201 through a fixing plate, the discharge end of a second feeding pipe 8 penetrates through the side wall of the combustion cup 3 and then extends into the combustion cup 3, and fuel is conveyed by a second feeding auger 9 and then enters the combustion cup 3;

the ignition mechanism 24 comprises an ignition rod and an ignition tube, a first end of the ignition tube is connected with the ignition rod, a second end of the ignition tube penetrates through the side wall of the combustion cup 3 and then extends into the combustion cup 3, and fuel entering the combustion cup 3 can be ignited through the ignition mechanism 24.

The air inlet mechanism comprises an air inlet groove 4 and an air supply device 5, referring to fig. 1, the air inlet groove 4 is arranged in the bottom and the side wall of the combustion cup 3, the air supply device 5 is used for supplying air into the air inlet groove 4, and a plurality of air inlet holes communicated with the air inlet groove 4 are arranged on the inner wall and the bottom surface of the combustion cup 3; in the fuel combustion process, the air supply device 5 starts to supply air into the air inlet groove 4, and the air is blown to the combusted fuel through a plurality of air inlet holes to provide proper oxygen for the combustion chamber to support combustion of the fuel; the air supply device 5 here can be, but is not limited to, a blower.

Referring to fig. 4-5, the multi-stage oxygen-assisting mechanism includes two second-stage oxygen-assisting pipes 16 and a third-stage oxygen-assisting pipe 17, and the inlet ends of the second-stage oxygen-assisting pipes 16 and the third-stage oxygen-assisting pipes 17 are connected to the same air inlet pipe, in this embodiment: the air inlet pipe comprises a first air inlet pipe 2101 and a second air inlet pipe 2102, wherein the first end of the first air inlet pipe 2101 is connected with a conversion chamber, the inlet ends of two secondary oxygen-assisting pipes 16 and a tertiary oxygen-assisting pipe 17 are both communicated with the conversion chamber, the first end of the second air inlet pipe 2102 is connected with the air supply device 5, and the second end of the second air inlet pipe 2102 is connected with the second end of the first air inlet pipe 2101 through a hose (the hose is not shown in the figure);

the two secondary oxygen-assisting pipes 16 are arranged above the combustion cup 3 in parallel, and a plurality of secondary oxygen-assisting holes 1601 are arranged at the bottom surface of each secondary oxygen-assisting pipe at intervals; the air supply device 5 is started to supply air into the lower furnace pipe 201 through the air inlet pipe, the conversion chamber, the secondary oxygen-aid pipe 16 and the secondary oxygen-aid holes 1601 in the fuel combustion process, and due to the arrangement position of the secondary oxygen-aid holes 1601, the air is blown out from top to bottom in the lower furnace pipe 201 and can form convection with the air entering from the air inlet holes, so that the fuel is fully contacted with oxygen;

an annular end pipe 18 is arranged at the end part of the outlet of the third-level oxygen-assisting pipe 17, a connecting pipe 19 is arranged between the upper furnace pipe 202 and the lower furnace pipe 201, the end pipe 18 is sleeved outside the connecting pipe 19, a third-level oxygen-assisting groove is formed between the end pipe 18 and the connecting pipe 19, and a plurality of third-level oxygen-assisting holes 20 communicated with the third-level oxygen-assisting groove are formed in the inner wall of the connecting pipe 19 at intervals along the circumferential direction; in the fuel combustion process, the air supply device 5 supplies air into the connecting pipe 19 through the air inlet pipe, the conversion chamber, the third-stage oxygen-assisting pipe 17, the third-stage oxygen-assisting groove and the third-stage oxygen-assisting pipe 17, part of the air is blown out from the edge to the middle in the connecting pipe 19, flame can penetrate through the connecting pipe 19 to enter the upper furnace pipe 202 in the fuel combustion process, and the flame can bring the part of the air into the upper furnace pipe 202 in the fuel combustion process, so that small solid particles in the flue gas ascending to the upper furnace pipe 202 can be further and fully combusted under the action of the part of the air and the flame.

Referring to fig. 1 and 3, in the present embodiment, a smoke discharging mechanism is disposed on the upper furnace 202 for discharging the residual smoke.

Through the technical scheme, fuel mainly burns in the lower furnace pipe 201, the air supply and the oxygen assistance effect of the air inlet mechanism and the secondary oxygen assistance pipe 16 are utilized, so that the fuel burning process in the lower furnace pipe 201 is more sufficient, and meanwhile, the flue gas ascending to the upper furnace pipe 202 can be discharged after being sufficiently burnt again through the air supply and the oxygen assistance effect of the tertiary oxygen assistance pipe 17, so that the content of fixed small particles in the flue gas discharged out of the heating furnace is reduced, and the smoke amount formed in the air due to the use of the heating furnace is reduced.

In this embodiment: referring to fig. 1, the heating furnace further comprises a shell and a base, the shell covers the outside of each part of the heating furnace, and rollers are arranged on the base, so that the heating furnace is convenient to move; the ignition mechanism 24, the driving device and the air supply device 5 can be electrically controlled.

Example 2

The present embodiment discloses a biomass heating furnace, which differs from the biomass heating furnace of embodiment 1 in that in the present embodiment: the feeding speed of the second feeding auger 9 is higher than that of the first feeding auger 7.

Because the fuel in the second feeding pipe 8 is continuous when the second feeding auger 9 feeds the fuel into the combustion cup 3, the fuel which enters the combustion cup 3 probably cannot fall into the bottom surface of the combustion cup 3 completely, so that when the fuel at the discharge port of the second feeding pipe 8 is ignited, flame or flame can enter the second feeding pipe 8 to ignite the fuel in the second feeding pipe 8, which is very dangerous;

in the embodiment, a certain distance is arranged between the first feeding pipe 6 and the second feeding pipe 8, so that a certain height difference is formed between the upper end and the lower end of the feeding chamber 10, and when the feeding speed of the second feeding auger 9 is set to be higher than that of the first feeding auger 7, the fuel fed into the feeding chamber 10 by the first feeding auger 7 is quickly fed away from the lower end of the feeding chamber 10 after contacting with the second feeding auger 9, so that fuel accumulation cannot be caused in the feeding chamber 10, and even if the fuel in the second feeding pipe 8 is ignited, the fire cannot spread into the storage bin 1 along the feeding chamber 10 and the first feeding pipe 6, the fire is controlled in time, and the loss is reduced.

Example 3

The present embodiment discloses a biomass heating furnace, which differs from the biomass heating furnace of embodiment 1 and/or embodiment 2 in that in the present embodiment: the second feeding auger 9 also has a function of pushing ash.

The fuel generates ash in the combustion process, and the heating stove needs to continuously carry out the transportation and combustion of the fuel in the working process, so a great amount of ash can be generated in the combustion cup 3, and if the ash is not disposed of in time, the following problems can exist: the first ash occupies more space in the combustion cup 3, so that the fuel in the second feeding pipe 8 can not smoothly enter the combustion cup 3, or the fuel is ignited and pushed into the second feeding pipe 8 by blocks formed by ash coking; the blocks formed by the second ash or the ash coking block the air inlet hole, and influence the oxygen supply below the combustion cup 3;

therefore, in the present embodiment, referring to fig. 1 and fig. 5, one end of the second feeding auger 9 close to the discharge end of the second feeding pipe 8 extends into the combustion cup 3; the inner wall of combustion cup 3 on one side of second conveying pipe 8 is the inclined plane of tilt up, and the outer wall of combustion cup 3 on one side of second conveying pipe 8 is the inclined plane of downward sloping.

Therefore, one end of the second feeding auger 9 can rotate in the combustion cup 3 in the process of conveying fuel, the ash coked and agglomerated by the combustion cup 3 can be scattered by the second feeding auger 9 in the process, and the auger comprises a shaft and blades spirally arranged on the outer wall of the shaft, the ash can be pushed onto the inner wall of the combustion cup 3 far away from one side of the second feeding pipe 8 under the driving of the blades, the outer wall of the combustion cup 3 far away from one side of the second feeding pipe 8 is an inclined plane inclined downwards, when the ash reaches the top of the side wall of the combustion cup 3, the ash can fall into the ash collecting space of the lower furnace pipe 201 downwards along the outer wall of the combustion cup 3 far away from one side of the second feeding pipe 8 under the action of gravity, please refer to fig. 1, a furnace door is arranged on the side wall of the lower furnace pipe 201, and the ash in the ash collecting space can be cleaned by opening the furnace door.

Example 4

The present example discloses a biomass heating furnace, which differs from the biomass heating furnace of example 1 and/or example 2 and/or example 3 in that in the present example: in order to prevent the flame in the combustion cup 3 from entering the second feeding pipe 8, the applicant adds an anti-backfire tube on the second feeding pipe 8;

referring to fig. 1, fig. 4 and fig. 5, in the present embodiment, the anti-backfire tube further includes a first anti-backfire tube 1101 and a second anti-backfire tube 1102, the first anti-backfire tube 1101 is disposed on the side wall of the second feeding pipe 8 near the discharge end, a first end of the first anti-backfire tube 1101 is communicated with the inside of the second feeding pipe 8 and inclines towards the discharge end of the second feeding pipe 8, a first end of the second anti-backfire tube 1102 is connected to the air supply device 5, and a second end of the second anti-backfire tube 1102 is connected to a second end of the first anti-backfire tube 1101 through a hose (the hose is not shown in the figure);

in the fuel combustion process, the air supply device 5 is started to supply air into the second feeding pipe 8 through the second anti-backfire pipe 1102, the hose and the first anti-backfire pipe 1101 and blow the air to the discharge end of the second feeding pipe 8, so that even if the flame in the combustion cup 3 tends to enter the second feeding pipe 8, the flame can be blown outwards at the discharge end of the second feeding pipe 8, the second feeding pipe 8 cannot be carried out, and the fuel in the second feeding pipe 8 is prevented from being ignited to cause loss.

Example 5

The present example discloses a biomass heating furnace, which differs from the biomass heating furnace of example 1 and/or example 2 and/or example 3 and/or example 4 in that in the present example: the smoke exhaust mechanism is further limited;

in this embodiment: the smoke exhaust mechanism comprises a smoke return chamber 12, a first smoke exhaust pipe group 13, a second smoke exhaust pipe group 15 and a smoke exhaust chamber 14, wherein the smoke return chamber 12 is arranged on one side above the upper furnace pipe 202, the first end of the first smoke exhaust pipe group 13 is communicated with the side wall of the upper furnace pipe 202, and the second end of the first smoke exhaust pipe group 13 is communicated with the bottom surface of the smoke return chamber 12; the smoke exhaust chamber 14 is arranged below the smoke return chamber 12, the side wall of the smoke exhaust chamber 14 is provided with an air inducing device 25, and the air inducing device 25 can be an induced draft fan or other air exhausting structures; the first end of the second smoke exhaust pipe group 15 is communicated with the bottom surface of the smoke returning chamber 12, and the second end of the second smoke exhaust pipe group 15 is communicated with the smoke exhausting chamber 14;

because the flue gas can still be combusted in the upper furnace flue 202, a large amount of heat is generated when the flue gas enters the first smoke exhaust pipe group 13, if the flue gas is directly exhausted, the heat can only be lost, and unfortunately, through the arrangement, the flue gas firstly enters the smoke return chamber 12 after entering the first smoke exhaust pipe group 13 from the upper furnace flue 202, and the flue gas is flushed to the inner top wall of the smoke return chamber 12 from bottom to top, then rebounds downwards to enter the second smoke exhaust pipe group 15 through the inner top wall of the smoke return chamber 12, then enters the smoke exhaust chamber 14, and is guided out of the heating furnace by the air guiding device 25, so that the flue gas movement path in the smoke exhaust process is prolonged, and the heat attached to the flue gas can be fully absorbed in the heating furnace;

the air inducing device 25 is always open during the whole fume extraction process, which is beneficial to guiding the fume in the fume return chamber 12 to the second fume extraction tube group 15.

Because still have partial impurity and fixed tiny particle in the flue gas, have partial impurity and solid tiny particle to adhere to roof in the smoke return room 12 when the roof contacts in smoke and the smoke return room 12, impurity and solid tiny particle pile up in the smoke return room 12 of having lasted for a long time, consequently are provided with the detachable deashing board at the top of smoke return room 12, and the deashing board is with the inside intercommunication of smoke return room 12, and the deashing board is dismantled to get off regularly like this and just can be cleared up smoke return room 12.

In this embodiment, the first smoke exhaust pipe set 13 comprises five smoke pipes, and the second smoke exhaust pipe set 15 comprises four smoke pipes.

Example 6

This embodiment discloses a biomass heating furnace which differs from the biomass heating furnace of embodiment 1 and/or embodiment 2 and/or embodiment 3 and/or embodiment 4 and/or embodiment 5 in that in this embodiment: a cooking bench 22 is arranged above the upper furnace pipe 202, the cooking bench 22 is communicated with the top of the upper furnace pipe 202, and a sealing cover 23 is arranged between the cooking bench 22 and the upper furnace pipe 202.

Referring to fig. 1 and 3, the cooking bench 22 is disposed above the upper furnace 202, the cooking bench 22 includes a cupola tube and a table top, the cupola tube is a section of annular body, the lower end of the cupola tube is communicated with the top of the upper furnace 202, the upper end of the cupola tube protrudes out of the table top surface, when the flame in the combustion chamber is flushed into the upper furnace 202, the flame can continue upward along the cupola tube, the sealing cover 23 is detachably mounted at the upper end of the cupola tube, when the sealing cover 23 covers the upper end of the cupola tube, the smoke and heat in the upper furnace 202 can not come out through the cupola tube, after the sealing cover 23 is removed, the upper end of the cupola tube can be placed with a heat receiver, such as a frying pan or a water boiler, and the cooking bench 22 is equivalent to a soil cooker used in rural areas, and due to the effect of the air inducing device 25, the smoke in the upper furnace 202 can preferentially enter into the smoke tube.

In the description of the present invention, it should be understood that the terms indicating the orientation or the positional relationship are based on the orientation or the positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the products of the present invention are usually placed when in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Claims (10)

1. A biomass heating furnace, characterized in that it comprises:

a silo (1) for storing fuel;

the combustion chamber comprises an upper furnace pipe (202) and a lower furnace pipe (201), and a combustion cup (3) and an ignition mechanism (24) are arranged in the lower furnace pipe (201);

the feeding mechanism is used for conveying combustion in the storage bin (1) to the combustion cup (3);

the air inlet mechanism is used for supplying air to the combustion chamber;

the multi-stage oxygen-assisting mechanism comprises a second-stage oxygen-assisting pipe (16) and a third-stage oxygen-assisting pipe (17), wherein the second-stage oxygen-assisting pipe (16) is used for supplying oxygen to the lower furnace pipe (201), and the third-stage oxygen-assisting pipe (17) is used for supplying oxygen to the upper furnace pipe (202);

a smoke exhaust mechanism for exhausting the smoke generated by the combustion chamber.

2. A biomass heating stove according to claim 1, characterised in that: the air inlet mechanism comprises an air inlet groove (4) and an air supply device (5), wherein the air inlet groove (4) is formed in the bottom and the side wall of the combustion cup (3), the air supply device (5) is used for supplying air to the air inlet groove (4), and a plurality of air inlet holes communicated with the air inlet groove (4) are formed in the inner wall and the bottom surface of the combustion cup (3).

3. A biomass heating furnace according to claim 1, characterised in that the feeding mechanism comprises:

the first feeding pipe (6) is provided with a feeding end and a discharging end, and a first feeding auger (7) is arranged in the first feeding pipe;

the second feeding pipe (8) is arranged below the first feeding pipe (6) in parallel, a feeding end and a discharging end are arranged on the second feeding pipe, and a second feeding auger (9) is arranged in the second feeding pipe;

a feeding chamber (10) which communicates the discharge end of the first feeding pipe (6) with the feed end of the second feeding pipe (8);

the bottom of the storage bin (1) is communicated with the feeding end of the first feeding pipe (6), and the discharging end of the second feeding pipe (8) is communicated with the combustion cup (3).

4. A biomass heating furnace according to claim 3, characterised in that: the feeding speed of the second feeding auger (9) is higher than that of the first feeding auger (7).

5. A biomass heating furnace according to claim 3, characterised in that: one end of the second feeding auger (9) close to the discharge end of the second feeding pipe (8) extends into the combustion cup (3).

6. A biomass heating stove according to claim 5, characterised in that: the inner wall of one side of the combustion cup (3) far away from the second feeding pipe (8) is an inclined plane which inclines upwards, and the outer wall of one side of the combustion cup (3) far away from the second feeding pipe (8) is an inclined plane which inclines downwards.

7. A biomass heating stove according to claim 3, characterised in that: the anti-backfire pipe is arranged on the second feeding pipe (8), the anti-backfire pipe is inclined towards the discharge end of the second feeding pipe (8), and the anti-backfire pipe can supply air to the discharge end of the second feeding pipe (8).

8. A biomass heating stove according to claim 1, characterised in that the smoke evacuation mechanism comprises:

a smoke return chamber (12);

a first smoke exhaust pipe group (13), the first end of which is communicated with the upper furnace pipe (202), and the second end of which is communicated with the smoke return chamber (12);

a smoke exhaust chamber (14), the side wall of which is provided with an induced draft device (25);

a second smoke exhaust pipe group (15) with a first end communicated with the smoke returning chamber (12) and a second end communicated with the smoke exhaust chamber (14);

the first smoke exhaust pipe group (13) and the second smoke exhaust pipe group (15) are distributed in parallel, and the flow directions of smoke in the first smoke exhaust pipe group (13) and the second smoke exhaust pipe are opposite.

9. A biomass heating stove according to claim 1, characterised in that: the multistage oxygen-assisting mechanism comprises two second-stage oxygen-assisting pipes (16) and a third-stage oxygen-assisting pipe (17), the inlet ends of the second-stage oxygen-assisting pipes (16) and the third-stage oxygen-assisting pipes (17) are connected with the same air inlet pipe, the two second-stage oxygen-assisting pipes (16) are arranged above the combustion cup (3) in parallel, and a plurality of second-stage oxygen-assisting holes (1601) are formed in the bottom surface of the combustion cup at intervals;

the export tip of tertiary oxygen tube (17) of helping is equipped with and is annular end pipe (18), it is equipped with connecting pipe (19) to go up between stove courage (202) and lower stove courage (201), end pipe (18) cover is established in connecting pipe (19) outside, be formed with tertiary oxygen groove of helping between end pipe (18) and connecting pipe (19), be equipped with a plurality ofly along the circumference interval on connecting pipe (19) inner wall and tertiary oxygen hole (20) of helping the oxygen groove intercommunication with the tertiary.

10. A biomass heating stove according to claim 1, characterised in that: a cooking bench (22) is arranged above the upper furnace pipe (202), the cooking bench (22) is communicated with the top of the upper furnace pipe (202), and a sealing cover (23) is arranged between the cooking bench (22) and the upper furnace pipe (202).

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