A stable non-combustible pellet stove

Abstract

The present application relates to a kind of stable unignited granular stove, including shell, be equipped with feeding device and fuel device inside shell, the side of feeding hopper is equipped with material cutter, the arrangement of raw material at the outlet of pusher tube is destroyed by material cutter, the combustion device includes combustion chamber, combustion chamber is equipped with combustion box and ash box inside, the inside of combustion box is equipped with ignition stick, ignition stick is U-shaped, combustion chamber both sides are equipped with air inlet channel and smoke extraction channel, water tank is equipped above combustion chamber, water tank upper end is equipped with water outlet pipe, water tank lower end is equipped with water inlet pipe, water outlet pipe, water inlet pipe and water tank form closed water circulation system.The present application has the process of being able to change the arrangement of biomass granule in the process of discharging in the process of discharging, effectively avoid biomass granule to pile up and jam when discharging, so that raw material supply is sustained and stable, combustion state is stable, reduce the condition of lack of material and unignited, increase the contact area of ignition stick and raw material simultaneously, can reduce ignition time, improve ignition speed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of biomass pellet heating stoves, in particular to a pellet stove capable of keeping burning stably. BACKGROUND

[0002] The biomass pellet heating stove is a heating stove using biomass pellets as fuel. The biomass pellets are block-shaped new energy produced by processing straw, straw, rice husk, peanut shell, corn cob and wood 'three leftovers'. The diameter of the biomass pellets is generally 6-10mm. There are two series of air heating and water heating. The air heating is to blow hot air after heating the machine hot bin by burning biomass pellets, and the water heating is to circulate to the radiator or heating pipe after heating the water in the water tank by burning biomass pellets.

[0003] At present, the biomass pellet heating stove generally has the problem of fireout and extinguishing during use. The reasons mainly include two points. One is that the hardness of the biomass pellets is different according to the different raw materials. During the feeding process of the heating stove, some hard pellets are easy to be blocked at the outlet of the feeding pipe, resulting in lack of fuel and causing fireout and extinguishing. The other is that the biomass heating stove usually uses a columnar ignition rod to heat the biomass pellets for ignition, which takes a long time and has a slow temperature rise, which also easily leads to fireout and extinguishing.

[0004] The prior art can refer to the invention patent with application number 2017105166721, which provides a wood pellet stove, including a feeding device arranged inside the shell, a combustion device arranged at the outlet of the feeding device, an operation panel arranged on the shell; the feeding device includes a feeding hopper fixed on the upper part of the inner side of the shell and a conveying belt arranged below the feeding hopper; the combustion device includes a combustion chamber, a combustion box arranged inside the combustion chamber, an ignition rod extending from the outside of the combustion chamber to the inside of the combustion box, a blowing motor and a suction motor arranged on both sides of the combustion chamber; further including a water circulation system connected with the shell, a safety door arranged at the front end of the shell and a control system for controlling the opening or closing of the switch, the operation of the conveying belt, the heating of the ignition rod and the operation of the blowing motor and the suction motor.

[0005] The prior art in the above has the following defects: the biomass pellets are transported by the conveying belt, and some high-hardness pellets are easy to accumulate and block at the outlet of the feeding pipe, which cannot be discharged, resulting in lack of fuel and causing fireout and extinguishing. The combustion box still uses a traditional single ignition rod, which is difficult to ignite. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application aims to provide a granular furnace capable of continuously and stably burning, which can change the arrangement of biomass granules during discharging, effectively avoid the accumulation and blockage of biomass granules during discharging, ensure the continuous and stable supply of raw materials, stabilize the combustion state, reduce the situation of material shortage and flameout, increase the contact area between the ignition rod and the raw materials, reduce the ignition time, improve the ignition speed, further stabilize the combustion state, and reduce the situation of flameout and extinguishment.

[0007] The above application object of the present application is achieved by the following technical scheme:

[0008] A granular furnace capable of continuously and stably burning, comprising a shell, a feeding device arranged in the shell, a fuel device, a water tank, and a control panel arranged on the outer side of the shell, characterized in that:

[0009] The feeding device comprises a feeding hopper, the bottom of the feeding hopper is provided with a rotationally connected spiral conveying pipe, the upper part of the spiral conveying pipe is communicated with the feeding hopper, a cutter is arranged on the side of the feeding hopper, the front end of the cutter extends into the gap between the spiral conveying blades, and the spiral conveying pipe penetrates out of the side of the feeding hopper.

[0010] The fuel device is arranged obliquely below the feeding device and comprises a combustion chamber, the combustion chamber is internally provided with a combustion box and an ash collecting box, the lower end surface of the combustion box is provided with an ash falling hole, the ash collecting box is correspondingly arranged below the combustion box, the inside of the combustion box is provided with an ignition rod, and the ignition rod is in a U shape.

[0011] An inclined sliding pipe is arranged between the feeding device and the fuel device, one end of the sliding pipe is communicated with the spiral conveying pipe, and the other end of the sliding pipe is communicated with the combustion box.

[0012] An air inlet channel is arranged on the side of the combustion box, one end of the air inlet channel is communicated with the combustion box, the other end of the air inlet channel is provided with an air inlet motor, an air extraction channel is arranged above the combustion chamber, one end of the air extraction channel is communicated with the combustion chamber, and an air extraction motor is arranged at the tail end of the air extraction channel.

[0013] The water tank is arranged above the combustion chamber, the upper end of the water tank is provided with a water outlet pipe, the lower end of the water tank is provided with a water inlet pipe, and the water outlet pipe, the water inlet pipe and the water tank form a closed water circulation system.

[0014] Preferably, the cutter comprises a cutter body part and a sawtooth part, the sawtooth part is located at the front end of the cutter, the sawtooth part is provided with sawteeth, one side of the sawteeth is a blade part, the other side is a back part, the position of the blade part is matched with the feeding direction of the spiral conveying pipe, and the fuel continuously collides with the blade part of the sawteeth when passing through the outlet of the pushing pipe, so that the fuel is cut into smaller fuel particles, the original arrangement of the fuel at the outlet of the pushing pipe is broken, and the fuel is prevented from being blocked at the outlet of the pushing pipe.

[0015] Preferably, the material knife comprises a knife body part and a serrated part, the serrated part is located at the front end of the material knife, serrations are arranged on the serrated part, and blade parts are arranged on both sides of the serrations, so that the cutting effect is better, and the fuel is prevented from being blocked at the outlet of the material pushing pipe.

[0016] Preferably, the material knife comprises a knife body part and a serrated part, the serrated part is located at the front end of the material knife, serrations are arranged on the serrated part, and blade parts are arranged on both sides of the serrations, so that the cutting effect is better, and the fuel is prevented from being blocked at the outlet of the material pushing pipe.

[0017] Preferably, the shell is provided with a hopper cover corresponding to the position of the upper opening of the hopper, and the hopper cover is matched with the upper opening of the hopper, so that the hopper is sealed through the hopper cover.

[0018] Preferably, the shell is provided with a safety observation window corresponding to the side of the material falling hopper, so that the fuel can be replenished in time, and the combustion of the fuel can be observed in real time through the safety observation window.

[0019] In summary, the present application has the following at least one beneficial technical effect:

[0020] The spiral conveying blade and the material sliding pipe cooperate with each other to convey the fuel in the spiral conveying direction, so that the fuel is prevented from being blocked during the discharging process, the combustion state is stable, the situation of fire breaking and extinguishing is reduced, the contact area between the ignition rod and the raw material is increased, the ignition time is reduced, and the ignition speed is improved.

[0021] The material knife with serrations can cut the fuel at the outlet of the material pushing pipe into smaller particles, break the arrangement mode of the fuel at the outlet of the material pushing pipe, and make the fuel smoothly pass through the outlet of the material pushing pipe and enter the material sliding pipe, so that the blocking phenomenon is avoided.

[0022] The cutting knife with the elastic baffle can pop the accumulated fuel away due to the elastic effect of the elastic baffle, and can also change the arrangement mode of the fuel at the outlet of the material pushing pipe, so that the accumulated fuel is dispersed, and the blocking phenomenon is avoided.

[0023] The safety observation window is arranged on the shell, so that the combustion of the fuel can be known in time. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is the front view of the present application;

[0025] Figure 2 is the hopper top view highlighting the internal structure of the hopper;

[0026] Figure 3is a left view of the present application;

[0027] Figure 4 is a right view of the present application;

[0028] Figure 5 is a longitudinal sectional view of the component structures of the present application;

[0029] Figure 6 is a component view of the structures of the present application;

[0030] Figure 7 is a perspective view of a single-blade cutter;

[0031] Figure 8 is a perspective view of a double-blade cutter;

[0032] Figure 9 is a perspective view of a spring blade cutter.

[0033] In the figure, 1 is a housing; 2 is a feeding device; 3 is a fuel device; 4 is a feeding hopper; 5 is a pushing pipe; 6 is a discharging port; 7 is a screw conveying pipe; 8 is a rotating shaft; 9 is a screw conveying blade; 10 is a pushing pipe outlet; 11 is a sliding pipe; 12 is a cutter; 14 is a combustion box; 15 is an ash collecting box; 16 is an ear plate; 17 is an ignition rod; 18 is an air inlet channel; 19 is an air inlet motor; 20 is a smoke outlet channel; 21 is an air outlet motor; 22 is a water tank; 23 is a water outlet pipe; 24 is a water inlet pipe; 25 is a circulating pump; 26 is a control panel; 27 is a cutter body; 28 is a sawtooth part; 29 is a blade part; 31 is a spring part; 32 is a spring stopper; 33 is a hopper cover; 34 is a safety observation window; 36 is a ventilation grid one; 37 is a ventilation grid two. DETAILED DESCRIPTION

[0034] The present application will be further described in detail below with reference to the accompanying drawings. EMBODIMENT

[0035] REFERENCE Figures 1-7The utility model provides a kind of stable unbroken fire granule stove, including square shell 1, be equipped with feeding device 2 and fuel device 3 inside shell 1, feeding device 2 is located in the upper left of shell 1, fuel device 3 is located in the oblique lower right of feeding device 2, feeding device 2 includes feeding hopper 4, feeding hopper 4 is inverted square table and is fixed on shell 1, feeding hopper 4 upper end opening and inside is equipped with feeding cavity, feeding hopper 4 bottom is equipped with pusher tube 5, feeding hopper 4 side close to fuel device 3 is equipped with pusher tube outlet 10, the position of pusher tube outlet 10 is compatible with the position of pusher tube 5, pusher tube 5 inside rotatably connected with spiral conveying pipe 7, spiral conveying pipe 7 is coaxial with pusher tube 5, spiral conveying pipe 7 includes rotating shaft 8 and spiral conveying blade 9, spiral conveying blade 9 is fixedly connected with rotating shaft 8 and spiral conveying blade 9 is distributed along the side of rotating shaft 8 in spiral, pusher tube 5 side close to the position of pusher tube outlet 10 is equipped with drop port 6, drop port 6 is connected feeding hopper 4 and pusher tube 5, the front end of pusher tube 5 and spiral conveying pipe 7 all extends feeding hopper 4 side, simultaneously be equipped with motor in shell 1, motor is driven spiral conveying pipe 7 rotation by chain drive, to pusher tube outlet 10 in feeding hopper 4 with fuel conveying in fuel device 3 in turn, with the mode of spiral conveying fuel, can all be stirred to the fuel of feeding hopper 4 bottom while conveying fuel, prevent fuel from being blocked at drop port 6, can stably continuously conveying fuel to fuel device 3, effectively reduce the occurrence of fuel device 3 material interruption shortage phenomenon, with chain drive mode drive rotating shaft 8 rotation, its power transmission is stable, will not slip, suitable for the working condition of low-speed heavy load of rotating shaft 8, simultaneously, since combustion can cause the temperature in shell 1 is higher, with chain drive mode can overcome high-temperature environment, keep stable power transmission.

[0036] A sliding pipe 11 is provided between the feeding device 2 and the fuel device 3, connecting the two devices so that fuel in the feeding device 2 slides into the fuel device 3 for combustion and heating. The sliding pipe 11 is an inclined pipe, with one end connected to the push pipe 5 and the other end connected to the fuel device 3. A cutting blade 12 is provided on the inner side of the feeding hopper 4 at the position corresponding to the outlet 10 of the push pipe. The cutting blade 12 changes the arrangement of fuel at the outlet 10 of the push pipe, further preventing fuel blockage at the outlet 10, and ensuring that fuel can be stably and continuously delivered to the sliding pipe 11 and then slide into the fuel device 3. The cutting blade 12 includes a blade body 27 and a serrated part 28, which are integrally formed. The blade body 27 is an arc-shaped plate, and the two sides of the blade body 27 are integrally formed ear plates 16. The cutting blade 12 is bolted to the ear plates 16. The sawtooth part 28 is fixed on the side of the feeding hopper 4 and extends into the gap of the spiral conveying blade 9. The sawtooth part 28 is distributed with sawtooths in an arc shape that matches the blade body 27. One side of the sawtooth is provided with a cutting edge 29 and the other side is provided with a back. The position of the cutting edge 29 is adapted to the feeding direction of the spiral conveying pipe 7. When the spiral conveying blade 9 drives the fuel through the push pipe outlet 10 to the sliding pipe 11, the fuel is prone to accumulate at the push pipe outlet 10 and then become blocked. With the sawtooth-shaped cutting blade 12, when passing through the push pipe outlet 10, the fuel can continuously collide with the cutting edge 29 of the sawtooth, thereby cutting the fuel into smaller fuel particles, breaking the original arrangement of the fuel at the push pipe outlet 10, further avoiding the fuel blockage at the push pipe outlet 10, and allowing the fuel to smoothly slide through the sliding pipe 11 into the fuel device 3.

[0037] The fuel device 3 includes a combustion chamber, which is a semi-enclosed combustion chamber with an observation opening on its side. Inside the combustion chamber are a combustion box 14 and an ash collection box 15. The combustion box 14 is fixed to the upper end of the combustion chamber, with an opening at its upper end connecting to a sliding material pipe 11. The ash collection box 15 is slidably positioned below the combustion box 14. A checkerboard-shaped pattern of ash collection holes is provided on the bottom surface of the combustion box 14. Ash generated during combustion falls through these holes into the ash collection box 15 for collection. A pull-out opening is provided on the surface corresponding to the position of the ash collection box 15. The ash collection box 15 can be pulled out of the combustion chamber through the pull-out opening to clean the dust. An ignition rod 17 is provided inside the combustion box 14. The ignition rod 17 extends from the outer side of the combustion chamber through the side of the combustion chamber and the side of the combustion box 14 to the inside of the combustion box 14. The ignition rod 17 is a U-shaped ignition rod 17, which can effectively increase the contact area between the fuel in the combustion box 14 and the ignition rod 17, increase the ignition temperature, accelerate the ignition speed, and greatly reduce the difficulty of initial ignition.

[0038] The side of the combustion chamber is provided with an air inlet channel 18 and an air inlet motor 19, the air inlet motor 19 is fixed inside the shell 1, one end of the air inlet channel 18 is communicated with the air inlet motor 19, the other end is communicated with the combustion box 14 in sequence through the side of the combustion chamber, the side of the shell 1 is provided with a grid-shaped air grid one 36 corresponding to the position of the air inlet motor 19, the air inlet motor 19 sends the air in the air to the combustion box 14 through the air grid one 36, provides the oxygen required for combustion, the upper side of the combustion chamber is provided with a smoke extraction channel 20, one end of the smoke extraction channel 20 is communicated with the combustion chamber, the other end is communicated with an air extraction motor 21, the side of the shell 1 opposite to the air grid one 36 is provided with an air grid two 37, the air grid two 37 is located at the upper end of the side of the shell 1, the air extraction motor 21 is fixed correspondingly near the air grid two 37, the air extraction motor 21 cooperates with the air inlet motor 19, can make the oxygen in the air supplement to the combustion box 14 in time, make the fuel burn fully, improve the burnout rate of the fuel, at the same time, reduce the harmful gas such as carbon monoxide caused by insufficient oxygen.

[0039] The upper side of the combustion chamber is provided with a water tank 22, the water tank 22 is fixed inside the shell 1, the upper end of the water tank 22 is provided with a water outlet pipe 23, the lower end of the water tank 22 is provided with a water inlet pipe 24, the water outlet pipe 23 and the water inlet pipe 24 extend to the outside of the shell 1, the water outlet pipe 23, the water inlet pipe 24 and the water tank 22 form a closed water circulation system, the water outlet pipe 23 is provided with a circulating pump 25, the circulating pump 25 is fixed on the upper end surface of the shell 1, the fuel in the combustion chamber is heated to heat the water tank 22, the hot water is sent to the heating coil or the heating pipe through the circulating pump 25, realizing water circulation heating.

[0040] The upper end surface of the shell 1 is rotatably connected with a hopper cover 33 corresponding to the position of the feeding hopper 4, the hopper cover 33 is matched with the upper opening of the feeding hopper 4, the feeding hopper 4 is sealed through the hopper cover 33, the side of the shell 1 is provided with a safety observation window 34 which can be opened and closed corresponding to the observation opening of the combustion chamber, so as to observe the combustion in the combustion chamber in real time.

[0041] The side of the shell 1 is provided with a control panel 26, the control panel 26 is located outside the safety observation window 34, the user starts the pellet stove to work through the control panel 26. Embodiment

[0042] Reference Figure 8 The difference between the embodiment one is that the blade part 29 is arranged on both sides of the sawtooth part 28 of the cutter 12, which can further improve the cutting effect of the cutter 12 on the fuel, and quickly break the state of the fuel blocking at the outlet 10 of the pushing pipe, so that the fuel can be continuously and stably delivered to the sliding pipe 11. Embodiment

[0043] Reference Figure 9Different from the embodiment one, the material knife 12 comprises a knife body part 27 and an elastic part 31, the elastic part 31 is an elastic baffle 32 made of rubber, the shape of the elastic baffle 32 is matched with the shape of the push material pipe outlet 10, the elastic baffle 32 is fixed on the front end of the knife body part 27 by means of gluing and extends into the gap of the spiral conveying blade 9, during the fuel conveying process, the fuel continuously accumulates and extrudes the elastic baffle 32 when meeting the elastic baffle 32, after extruding to a certain degree, the accumulated fuel is bounced away due to the elastic effect of the elastic baffle 32, the arrangement mode of the fuel at the push material pipe outlet 10 is changed, the accumulated fuel is scattered, so that the fuel can be stably and continuously conveyed into the slide material pipe 11, and the plugging phenomenon is avoided.

[0044] Working process: the fuel is poured into the feeding hopper 4, the user starts the pellet stove, the motor drives the spiral conveying blade 9 to rotate, the fuel is continuously conveyed into the slide material pipe 11 through the push material pipe outlet 10, and the arrangement mode of the fuel at the push material pipe outlet 10 is changed through the material knife 12, so that the fuel at the push material pipe outlet 10 is prevented from being blocked, the fuel in the slide material pipe 11 slides to the combustion box 14 under the action of gravity, the fuel in the combustion box 14 is ignited by the ignition rod 17, and the air supply motor and the air exhaust motor 21 work cooperatively to provide sufficient air for the combustion box 14, the fuel is fully combusted, the flame is strong, the water tank 22 above the combustion chamber is heated, the water is circulated by the circulating pump 25, and the heating is realized. A stable and continuous pellet stove can change the arrangement mode of the biomass particles at the push material pipe outlet 10 during the feeding process, the pellet stove effectively avoids the accumulation and plugging of the biomass particles during the feeding, the raw material supply is continuous and stable, the combustion state is stable, the flame is strong, and the situation of lack of material and fire interruption is reduced.

[0045] The embodiments of the specific implementation are the preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A stable non-combustion pellet stove, comprising a shell, a feeding device, a fuel device, a water tank and a control panel, the feeding device, the fuel device and the water tank are arranged inside the shell, and the control panel is arranged on the outer wall of the shell, characterized in that: the feeding device comprises a feeding hopper, a push tube is fixedly arranged at the bottom of the feeding hopper, a spiral conveying pipe is rotatably connected inside the push tube, the spiral conveying pipe comprises a rotating shaft and spiral conveying blades, the upper part of the spiral conveying pipe is communicated with the feeding hopper, a hopper cover is arranged on the shell corresponding to the position of the opening of the upper part of the feeding hopper, the hopper cover is matched with the opening of the upper part of the feeding hopper, a cutter is arranged on the side of the feeding hopper, the front end of the cutter extends into the gap between the spiral conveying blades, and the spiral conveying pipe penetrates out of the side of the feeding hopper; the fuel device is arranged obliquely below the feeding device and comprises a combustion chamber, the combustion chamber is internally provided with a combustion box and an ash collecting box, the lower end surface of the combustion box is provided with an ash falling hole, the ash collecting box is correspondingly arranged below the combustion box, and a ignition rod is arranged inside the combustion box and has a U shape; an inclined sliding tube is arranged between the feeding device and the fuel device, one end of the sliding tube is communicated with the spiral conveying pipe, and the other end is communicated with the combustion box; an air inlet channel is arranged on the side of the combustion box, one end of the air inlet channel is communicated with the combustion box, the other end is provided with an air inlet motor, an air extraction channel is arranged above the combustion chamber, one end of the air extraction channel is communicated with the combustion chamber, and an air extraction motor is arranged at the tail end of the air extraction channel; a water tank is arranged above the combustion chamber, a water outlet pipe is arranged at the upper end of the water tank, a water inlet pipe is arranged at the lower end of the water tank, and the water outlet pipe, the water inlet pipe and the water tank form a closed water circulation system; the control panel is used to start the pellet stove to work; a safety observation window is mounted on the shell corresponding to the side of the feeding hopper. The cutter comprises a cutter body and a sawtooth part, the sawtooth part is located at the front end of the cutter, sawteeth are arranged on the sawtooth part, one side of the sawteeth is a blade part, the other side is a back part, and the position of the blade part is matched with the feeding direction of the spiral conveying pipe.

2. A stable non-combustible pellet stove according to claim 1, characterized in that: The cutter comprises a cutter body and a sawtooth part, the sawtooth part is located at the front end of the cutter, sawteeth are arranged on the sawtooth part, and blade parts are arranged on both sides of the sawteeth.

3. A stable non-combustible pellet stove according to claim 1, characterized in that: The cutter comprises a cutter body and an elastic part, the elastic part is located at the front end of the cutter, the elastic part is an elastic baffle made of an elastic material, and the shape of the elastic baffle is matched with the shape of the outlet of the push tube.

4. A stable non-combustible pellet stove according to claim 1, characterized in that: ​

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