Small-size energy-saving biomass stove

Abstract

The utility model discloses a small-size energy-saving biomass stove, which comprises a stove body, and a stock bin, a screw conveyer, a fan and a combustion chamber which are arranged on the stove body, an air supply pipeline and a ventilation chamber are arranged on the stove body, the middle rear section of a conveying pipeline of the screw conveyer is positioned in the air supply pipeline, and the combustion chamber is positioned in the ventilation chamber with an opening at the upper end. The bottom of the combustion chamber is provided with an inside-outside through air inlet hole, the fan is located at the position close to the air supply pipeline, an air outlet of the fan is communicated with the air inlet end of the air supply pipeline, the air outlet end of the air supply pipeline is communicated with the ventilation chamber, and a conveying pipeline of the spiral conveyor penetrates through the side wall of the ventilation chamber. The air supply pipeline and the ventilation chamber are additionally arranged, the air supply pipeline is arranged outside the conveying pipeline of the spiral conveyor, the ventilation chamber is arranged outside the combustion chamber, and an inner and outer sleeving structure is formed, so that the occupied space of the fan, the air supply pipeline and the ventilation chamber is obviously reduced, the size of the cooking range is reduced, and the cooking range is convenient to move and apply.

Description

Technical Field

[0001] The utility model relates to a biomass stove which uses granular biomass as fuel, in particular to a small-volume energy-saving biomass stove. Background Art

[0002] Traditional wood stoves are a cooking tool that can be used outdoors or indoors. They usually use firewood and charcoal as fuel, and burn through oxidation reactions to generate high temperatures to complete cooking. This traditional stove has many defects, such as troublesome operation, inconvenient fuel storage, inconvenient control of combustion status, unsafe and unhygienic, and environmental impact, and has been gradually eliminated.

[0003] Stoves that use biomass pellets made from straw, wood and other raw materials as fuel are called biomass stoves. They are becoming more and more widely used because of their simple operation, easy fuel storage, easy control of combustion status, relatively safe and hygienic, and environmentally friendly advantages.

[0004] For example, the invention patent with the patent number "ZL 201710292730.7" discloses an energy-saving stove, including a fuel chamber, a main combustion chamber, a waste heat recovery chamber, a screw feeder, a drive device and a fan. The invention uses a screw feeder to transport biomass pellet fuel to the main combustion chamber for combustion, and uses a fan to send air into the main combustion chamber to achieve a more complete combustion.

[0005] However, the energy-saving stove of the above invention has the following defects: the fan is placed at the lower side of the main combustion chamber and air is delivered to the main combustion chamber through the pipe and air supply cavity located below the main combustion chamber. This will increase the volume of the stove, resulting in a larger occupied space and being inconvenient to move, thus limiting its application. Utility Model Content

[0006] The purpose of the utility model is to provide a small-volume energy-saving biomass stove that occupies little space and is easy to move and use in order to solve the above problems.

[0007] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0008] A small-volume energy-saving biomass stove comprises a stove body and a silo, a screw conveyor, a fan and a combustion chamber arranged on the stove body, the lower end outlet of the silo is connected to the front section of the conveying pipe of the screw conveyor, the outlet of the conveying pipe of the screw conveyor is connected to the combustion chamber, an air supply duct and a ventilation chamber are installed on the stove body, the middle and rear sections of the conveying pipe of the screw conveyor are located in the air supply duct, the combustion chamber is located in the ventilation chamber with an upper end opening, an air inlet hole that passes through inside and outside is provided at the bottom of the combustion chamber, the fan is located near the air supply duct and the air outlet of the fan is connected to the air inlet end of the air supply duct, the air outlet end of the air supply duct is connected to the ventilation chamber, and the conveying duct of the screw conveyor passes through the side wall of the ventilation chamber.

[0009] Preferably, in order to achieve better control over the air supply volume and thus better control the combustion state, there are two fans and they are respectively located on opposite sides of the air supply duct.

[0010] Preferably, in order to realize electronic ignition and facilitate compact installation, an igniter is provided in the air supply duct, and an ignition needle of the igniter passes through a corresponding through hole on the side wall of the combustion chamber and is located in the combustion chamber.

[0011] Preferably, in order to realize the screw shaft driving function of the screw conveyor and facilitate further reducing the volume, the motor of the screw conveyor is located below the conveying pipe, and the rotating shaft of the motor is connected to one end of the screw shaft in the conveying pipe through a synchronous belt.

[0012] Preferably, in order to better exhaust smoke and further reduce the volume, a smoke guide cavity larger than the combustion chamber is provided on the furnace body above the combustion chamber, the upper opening end of the combustion chamber passes through the bottom of the smoke guide cavity, a chimney is provided on the furnace body near the smoke guide cavity, a smoke guide hole is provided on the side wall of the smoke guide cavity, and the smoke guide hole is communicated with the lower end of the chimney.

[0013] Preferably, in order to facilitate the placement of the pot body and facilitate centralized smoke exhaust, a pot placing ring for placing the pot body is provided at the bottom of the smoke guide cavity, the inner diameter of the pot placing ring is not less than the inner diameter of the combustion chamber, the upper opening end of the combustion chamber is located inside the lower end of the pot placing ring, and a plurality of smoke outlet holes are provided on the side wall of the pot placing ring.

[0014] Preferably, in order to facilitate the observation of combustion conditions and the removal of ash and slag and to further reduce the volume, an observation cavity is provided on the furnace body next to the pot placing ring and an observation door is installed at the outer end of the observation cavity, a notch is provided on the side wall of the pot placing ring at a position corresponding to the inner end of the observation cavity, a slag discharge cavity is provided on the furnace body below the observation cavity and a slag discharge door is installed at the outer end of the slag discharge cavity, and the inner end of the slag discharge cavity passes through the side wall of the ventilation chamber and is communicated with the combustion chamber.

[0015] Preferably, for ease of control, a control panel is provided on the front side panel of the furnace body, and the motor of the screw conveyor and the fan are respectively connected to the control panel accordingly.

[0016] Preferably, in order to facilitate movement, rollers are installed at the lower ends of the four corners of the furnace body.

[0017] The beneficial effects of the utility model are:

[0018] The utility model increases an air supply duct and a ventilation chamber, and arranges the air supply duct outside the conveying duct of the screw conveyor, and arranges the ventilation chamber outside the combustion chamber to form an inner-outer outer structure, which significantly reduces the occupied space of the fan, the air supply duct and the ventilation chamber, reduces the volume of the stove, and is convenient for movement and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the small-volume energy-saving biomass stove of the utility model;

[0020] Figure 2 It is a top view of the small-volume energy-saving biomass stove of the utility model;

[0021] Figure 3 It is a bottom view of the small-volume energy-saving biomass stove of the utility model;

[0022] Figure 4 This is an AA cross-sectional view in the top view of the small-volume energy-saving biomass stove of the utility model. The cross-sectional view is not shown in the figure but is easy to understand. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings:

[0024] like Figure 1-Figure 4As shown, the small-volume energy-saving biomass stove of the utility model comprises a furnace body 1 and a silo 4, a screw conveyor, a fan 19, and a combustion chamber 11 arranged on the furnace body 1. The lower end outlet of the silo 4 is connected to the front section (a section close to the feed end) of the conveying pipe 17 of the screw conveyor, and the outlet of the conveying pipe 17 of the screw conveyor is connected to the combustion chamber 11. An air supply pipe 20 and a ventilation chamber 21 are installed on the furnace body 1. The middle and rear sections of the conveying pipe 17 of the screw conveyor are located in the air supply pipe 20, and the combustion chamber 11 is located in the ventilation chamber 21 with an upper opening. A plurality of air inlet holes 15 are provided at the bottom of the combustion chamber 11, and the fan 19 is located near the air supply pipe 20 and the air outlet of the fan 19 is connected to the air inlet end of the air supply pipe 20, and the air outlet end of the air supply pipe 20 is connected to the ventilation chamber 21, and the conveying pipe 17 of the screw conveyor passes through the side wall of the ventilation chamber 21.

[0025] like Figure 1-Figure 4 As shown, the utility model also discloses the following more optimized specific structures:

[0026] In order to achieve better control over the air supply volume and thus better control the combustion state, there are two fans 19 which are respectively located on opposite sides of the air supply duct 20 .

[0027] In order to realize electronic ignition and facilitate compact installation, an igniter 23 is provided in the air supply duct 20 . The ignition needle of the igniter 23 passes through the corresponding through hole on the side wall of the combustion chamber 11 and is located in the combustion chamber 11 .

[0028] In order to realize the driving function of the screw shaft 22 of the screw conveyor and facilitate further reducing the volume, the motor 18 of the screw conveyor is located below the conveying pipe 17, and the rotating shaft of the motor 18 is connected to one end of the screw shaft 22 in the conveying pipe 17 through a synchronous belt (not marked in the figure).

[0029] In order to better exhaust the smoke, a smoke guide chamber 6 whose size is larger than the combustion chamber 11 is provided on the furnace body 1 at a position above the combustion chamber 11, and the upper opening end of the combustion chamber 11 passes through the bottom of the smoke guide chamber 6. A chimney 9 is provided on the furnace body 1 near the smoke guide chamber 6, and a smoke guide hole 8 is provided on the side wall of the smoke guide chamber 6, and the smoke guide hole 8 is communicated with the lower end of the chimney 9.

[0030] In order to facilitate the placement of the pot body, centralize smoke exhaust and further reduce the volume, a pot placing ring 7 for placing the pot body is provided at the bottom of the smoke guide cavity 6. The inner diameter of the pot placing ring 7 is not less than the inner diameter of the combustion chamber 11. The upper opening end of the combustion chamber 11 is located inside the lower end of the pot placing ring 7. A plurality of smoke outlet holes 10 are provided on the side wall of the pot placing ring 7.

[0031] In order to facilitate the observation of combustion conditions and the removal of ash and slag and to further reduce the volume, an observation chamber 13 is provided on the furnace body 1 next to the pot ring 7, and an observation door (not separately marked in the figure) is installed at the outer end of the observation chamber 13, a notch 16 is provided on the side wall of the pot ring 7 at a position corresponding to the inner end of the observation chamber 13, a slag discharge chamber 12 is provided on the furnace body 1 below the observation chamber 13, and a slag discharge door (not separately marked in the figure) is installed at the outer end of the slag discharge chamber 12, and the inner end of the slag discharge chamber 12 passes through the side wall of the ventilation chamber 21 and is connected to the combustion chamber 11.

[0032] For the convenience of control, a control panel 3 is provided on the front side panel of the furnace body 1 , and the motor 18 and the fan 19 of the screw conveyor are respectively connected to the control panel 3 .

[0033] In order to facilitate movement, rollers 14 are installed at the lower ends of the four corners of the furnace body 1.

[0034] Figure 1-Figure 4 The figure also shows a furnace table 2 arranged on the upper part of the furnace body 1. Figure 1 , Figure 2 and Figure 4 Also shown is a silo cover plate 5 disposed on the upper end of the silo 4, both of which are conventional adaptive structures.

[0035] like Figure 1-Figure 4 As shown, when used, the biomass particles used as fuel are poured into the silo 4, and the biomass particles enter the conveying pipe 17 of the screw conveyor from the outlet at the lower end of the silo 4. Driven by the rotation of the screw shaft 22, the biomass particles move toward the combustion chamber 11 and enter the combustion chamber 11. The speed at which the biomass particles enter the combustion chamber 11 can be controlled by the speed of the motor 18 of the screw conveyor, so the total amount of biomass particles entering the combustion chamber 11 within a certain time range can be controlled, thereby effectively controlling the combustion state; the wind generated by the fan 19 enters the ventilation chamber 21 from the air supply pipe 20, and then enters from the air inlet 15 at the bottom of the combustion chamber 11 The combustion chamber 11 is conducive to making the combustion more intense and thorough. By controlling the output power of the fan 19 and the start and stop status of the two fans 19, the air supply volume can be better controlled, which is further conducive to controlling the combustion state and saving fuel. The flame generated by the combustion in the combustion chamber 11 can be observed through the observation cavity 13 to understand the combustion state. The smoke generated by the combustion in the combustion chamber 11 enters the chimney 9 through the smoke outlet 10 and the smoke guide hole 8 and is discharged to higher air to prevent the smoke from affecting the normal work of the operator. When slag discharge is required, open the slag discharge door at the outer end of the slag discharge cavity 12, and use the slag discharge tool to discharge the ash in the combustion chamber 11.

[0036] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.

Claims

1. A small-volume energy-saving biomass stove, comprising a stove body and a silo, a screw conveyor, a fan, and a combustion chamber arranged on the stove body, wherein the lower end outlet of the silo is connected to the front section of the conveying pipeline of the screw conveyor, and the outlet of the conveying pipeline of the screw conveyor is connected to the combustion chamber, characterized in that: An air supply duct and a ventilation chamber are installed on the furnace body, the middle and rear sections of the conveying duct of the screw conveyor are located in the air supply duct, the combustion chamber is located in the ventilation chamber with an opening at the upper end, and the bottom of the combustion chamber is provided with an air inlet hole that passes through inside and outside, the fan is located near the air supply duct and the air outlet of the fan is connected to the air inlet end of the air supply duct, the air outlet end of the air supply duct is connected to the ventilation chamber, and the conveying duct of the screw conveyor passes through the side wall of the ventilation chamber.

2. The small-volume energy-saving biomass stove according to claim 1 is characterized in that: There are two fans, which are respectively located on two opposite sides of the air supply duct.

3. The small-volume energy-saving biomass stove according to claim 1 or 2, characterized in that: An igniter is arranged in the air supply duct, and an ignition needle of the igniter passes through a corresponding through hole on the side wall of the combustion chamber and is located in the combustion chamber.

4. The small-volume energy-saving biomass stove according to claim 1 or 2, characterized in that: The motor of the screw conveyor is located below the conveying pipeline, and the rotating shaft of the motor is connected to one end of the screw shaft in the conveying pipeline through a synchronous belt.

5. The small-volume energy-saving biomass stove according to claim 1 or 2, characterized in that: A smoke guide cavity larger than the combustion chamber is provided on the furnace body at a position above the combustion chamber, the upper opening end of the combustion chamber passes through the bottom of the smoke guide cavity, a chimney is provided on the furnace body near the smoke guide cavity, a smoke guide hole is provided on the side wall of the smoke guide cavity, and the smoke guide hole is communicated with the lower end of the chimney.

6. The small-volume energy-saving biomass stove according to claim 5 is characterized in that: A pot-setting ring for placing the pot body is provided at the bottom of the smoke-guiding cavity, the inner diameter of the pot-setting ring is not less than the inner diameter of the combustion chamber, the upper opening end of the combustion chamber is located inside the lower end of the pot-setting ring, and a plurality of smoke outlets are provided on the side wall of the pot-setting ring.

7. The small-volume energy-saving biomass stove according to claim 6 is characterized in that: An observation cavity is provided on the furnace body next to the pot placing ring, and an observation door is installed at the outer end of the observation cavity. A notch is provided on the side wall of the pot placing ring at a position corresponding to the inner end of the observation cavity. A slag discharge cavity is provided on the furnace body below the observation cavity, and a slag discharge door is installed at the outer end of the slag discharge cavity. The inner end of the slag discharge cavity passes through the side wall of the ventilation chamber and is communicated with the combustion chamber.

8. The small-volume energy-saving biomass stove according to claim 1 or 2, characterized in that: A control panel is provided on the front side panel of the furnace body, and the motor of the screw conveyor and the fan are respectively connected to the control panel accordingly.

9. The small-volume energy-saving biomass stove according to claim 1 or 2, characterized in that: Rollers are installed at the lower ends of the four corners of the furnace body.

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