Device for extracting gas fuel from biomass material

Abstract

The invention discloses a device for extracting gas fuel from biomass materials, which comprises a bottom plate, the right side of the upper end face of the bottom plate is fixedly connected with a fermentation chamber, the front side of the fermentation chamber is provided with a deoxygenization pool fixedly connected to the upper end face of the bottom plate, and the deoxygenization pool is filled with deoxygenization liquid for absorbing oxygen; the absorption tower is fixedly connected with a third electromagnetic valve communicating the through hole with the fermentation tank, the sealing plate is fixedly connected with an absorption plate located in the absorption cavity, the absorption plate can absorb carbon dioxide gas, and the lower side of the front end face of the deoxygenation tank is fixedly connected with a one-way valve; a gas conveying pipe is fixedly connected between the upper side of the rear end surface of the deoxygenation pool and the first electromagnetic valve on the front end surface of the fermentation chamber, so that oxygen in air can be removed, an anaerobic environment is formed, and the biomass material can generate biogas, a material crushing frame is arranged on the left side of the fermentation chamber, a material crushing groove is formed in the material crushing frame, and a leavening agent tank is arranged between the material crushing frame and the fermentation chamber; and the leavening agent tank is filled with leavening agent particles for improving the fermentation efficiency.

Description

Technical Field

[0001] The invention relates to the field of biomass fuels, in particular to a device for extracting gaseous fuel from biomass materials. Background Art

[0002] Biomass fuel is a fuel made from biomass materials, which are generally mainly agricultural and forestry waste (such as straw, sawdust, bagasse, rice bran, etc.). After these agricultural and forestry wastes are dried, fermentation agents (composed of livestock manure, etc.) are added, and then anaerobic bacteria are quickly produced in an anaerobic environment. The anaerobic bacteria decompose the agricultural and forestry wastes to produce biogas. The biogas contains a large amount of methane, which is an efficient fuel. It also contains carbon dioxide gas, which needs to be removed by adsorption to extract a higher concentration of methane gas for storage and use as fuel gas. Summary of the invention

[0003] The object of the present invention is to provide a device for extracting gaseous fuel from biomass materials to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: comprising a bottom plate, wherein the right side of the upper end surface of the bottom plate is fixedly connected to a fermentation chamber, wherein a fermentation tank is arranged in the fermentation chamber, wherein the fermentation chamber is provided with two front-to-back symmetrical through holes, wherein the through holes are connected to the fermentation tank, wherein the front and rear end surfaces of the fermentation chamber are both fixedly connected to a first solenoid valve located at the through hole, wherein a deoxygenation tank fixedly connected to the upper end surface of the bottom plate is arranged at the front side of the fermentation chamber, wherein the deoxygenation tank is filled with deoxygenation liquid that absorbs oxygen, wherein an absorption tower is fixedly connected to the upper end surface of the fermentation chamber, wherein an absorption cavity is arranged in the absorption tower, wherein the absorption tower is fixedly connected to a third solenoid valve that connects the through hole with the fermentation tank, and wherein the absorption The tower seal is clamped with a sealing plate, the sealing plate is fixedly connected to an absorption plate located in the absorption chamber, the absorption plate can absorb carbon dioxide gas, a one-way valve is fixedly connected to the lower side of the front end surface of the deaeration tank, the one-way valve is fixedly connected to an air inlet pipe, and an air supply pipe is fixedly connected between the upper side of the rear end surface of the deaeration tank and the first solenoid valve on the front end surface of the fermentation chamber, so that oxygen in the air can be removed to form an anaerobic environment, so that the biomass material can generate biogas. A chip rack is provided on the left side of the fermentation chamber, a chip trough is provided in the chip rack, a fermentation agent tank is provided between the chip rack and the fermentation chamber, and the fermentation agent tank is filled with fermentation agent particles for improving fermentation efficiency;

[0005] The upper end surface of the bottom plate is fixedly connected to an air pump located at the rear side of the fermentation chamber, the rear end surface of the air pump is fixedly connected to an air outlet pipe, and an exhaust pipe is fixedly connected between the front end surface of the air pump and the first solenoid valve on the rear end surface of the fermentation chamber, so that the air containing oxygen in the fermentation tank can be extracted, and the deoxygenation tank is cooperated to form an anaerobic environment in the fermentation tank;

[0006] Preferably, the fermentation chamber is provided with a feed hole, the left end surface of the fermentation chamber is dynamically connected to an expansion rack that closes the feed hole, the left end surface of the fermentation chamber is fixedly connected to two electric slide rails that are symmetrical in front and back, the electric slide rails are dynamically connected to sliders, the sliders are fixedly connected to a sealing baffle, the sealing baffle is slidably connected to the expansion rack, and the sealing baffle can close the passage of the expansion rack into the fermentation tank, so as to cooperate with the first solenoid valve and the third solenoid valve to seal the fermentation tank, prevent air containing oxygen from entering, maintain an anaerobic environment, and ensure the fermentation effect;

[0007] Preferably, the left end face of the expansion rack is fixedly connected to a material transport rack, the upper end face of the material transport rack is fixedly connected to the lower end face of the crushing rack, the crushing trough is communicated with the material transport rack, the upper end of the crushing rack is fixedly connected to a fixing plate, the upper end face of the fixing plate is fixedly connected to a motor, the lower end face of the fixing plate is fixedly connected to a rotating shaft, the rotating shaft is fixedly connected to three groups of cutting blades which are gradually shortened from top to bottom, the motor is dynamically connected to the rotating shaft, the motor can drive the cutting blades to rotate quickly, so that the biomass material can be cut into smaller blocks, the contact area of ​​the fermentation is increased, and the fermentation efficiency is improved;

[0008] Preferably, the upper end surface of the material transport rack is fixedly connected to a connecting rack, the upper end surface of the connecting rack is fixedly connected to the lower end surface of the fermentation agent tank, the fermentation agent tank has a material cavity filled with the fermentation agent particles, the connecting rack is fixedly connected to a second solenoid valve, the second solenoid valve is communicated with the material cavity, and a feed pipe is fixedly connected between the lower end surface of the second solenoid valve and the material transport rack, so that the speed of adding the fermentation agent particles into the material transport rack is controlled by the second solenoid valve, the fermentation agent particles are evenly mixed with the biomass material, the fermentation efficiency is greatly improved, and biogas is quickly generated;

[0009] Preferably, the sealing plate is fixedly connected to a handle, through which the absorption plate is pulled out, the front and rear end walls of the through hole are fixedly connected to a positioning plate located on the lower side of the absorption plate, so as to facilitate quick replacement, the upper end face of the absorption tower is fixedly connected to a fuel pipe, the fuel pipe is connected to a methane gas storage device, a support column is fixedly connected between the material transport rack and the upper end face of the base plate, the support column plays a supporting role, the upper end face of the base plate is fixedly connected to a controller, the controller controls the motor, the second solenoid valve, the electric slide rail, the first solenoid valve, the third solenoid valve and the air pump, so as to realize automatic extraction of biomass fuel.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] Through the deoxygenation tank, air pump and fermentation chamber, after the biomass material is loaded into the fermentation tank, the feed hole is blocked by a sealing baffle to form a closed fermentation tank, and then the first solenoid valves on the front and rear sides of the fermentation chamber are opened, and the air in the fermentation tank is pumped out by the air pump, and the air is passed from the second solenoid valve to the deoxygenation tank through the one-way valve, and after the oxygen in the air is removed by the deoxygenation liquid, it is passed into the fermentation tank, so that the fermentation tank forms an anaerobic environment, and then the first solenoid valve is closed;

[0012] The biomass material is added into the crushing trough through the cutting blade, the fermentation agent tank and the second solenoid valve. The biomass material is cut into smaller pieces through the rapid rotation of the cutting blade to improve the fermentation efficiency. When the biomass material slides down through the material transport rack, the second solenoid valve controls the falling speed of the fermentation agent particles in the fermentation agent tank, and a proper amount of fermentation agent particles are uniformly added from the feed pipe to the material transport rack, thereby greatly improving the fermentation speed of the biomass material and accelerating the generation of biogas.

[0013] Through the absorption plate, the third solenoid valve and the absorption tower, by controlling the switch of the third solenoid valve, the biogas in the fermentation tank is passed into the through hole, and after being filtered by the absorption plate, the carbon dioxide in the biogas is absorbed, so that the methane gas discharged from the fuel pipe is a higher concentration. The fuel pipe is connected to the methane storage device, so as to extract methane from the biomass material. Methane is a commonly used gas fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 An overall three-dimensional schematic diagram of a device for extracting gaseous fuel from biomass materials proposed in the invention;

[0015] Figure 2 A top-down three-dimensional schematic diagram of a device for extracting gas fuel from biomass materials proposed in the invention;

[0016] Figure 3 for Figure 2 AA cross-sectional diagram of ;

[0017] Figure 4 for Figure 2 BB cross-sectional diagram;

[0018] Figure 5 for Figure 2 Schematic diagram of CC cross section;

[0019] Figure 6 , 7 for Figure 3 A partial enlarged schematic diagram of

[0020] Figure 8 for Figure 4 A partial enlarged schematic diagram of

[0021] Fig. 9 for Figure 5 A partial enlarged schematic diagram of

[0022] Fig.10 A three-dimensional cross-sectional schematic diagram of a crushing tank and a fermentation agent tank in a device for extracting gas fuel from biomass materials proposed in the invention;

[0023] Fig.11 A three-dimensional schematic cross-sectional view of a material expansion rack in a device for extracting gas fuel from biomass materials proposed in the invention;

[0024] Fig.12 A three-dimensional schematic cross-sectional view of an absorption tower in a device for extracting gaseous fuel from biomass materials proposed in the invention.

[0025] In the figure: 100, bottom plate; 101, fermentation chamber; 102, crushing rack; 103, support column; 104, fermentation agent tank; 105, controller; 106, fixed plate; 107, absorption tower; 108, air pump; 109, deoxygenation tank; 110, material transport rack; 111, material expansion rack; 112, crushing trough; 113, rotating shaft; 114, cutting blade; 115, motor; 116, electric slide rail; 117, fermentation tank; 118, sealing baffle; 119, feeding hole; 120, Exhaust pipe; 121, air outlet pipe; 122, first solenoid valve; 123, connecting frame; 124, material chamber; 125, leavening agent particles; 126, second solenoid valve; 127, feed pipe; 128, absorption chamber; 129, third solenoid valve; 130, sealing plate; 131, handle; 132, absorption plate; 133, fuel pipe; 134, air supply pipe; 135, slider; 136, air inlet pipe; 137, deoxygenating liquid; 138, through hole; 139, positioning plate; 140, one-way valve. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1:

[0028] See also Figure 1-12The present invention provides a technical solution: comprising a bottom plate 100, wherein a fermentation chamber 101 is fixedly connected to the right side of the upper end surface of the bottom plate 100, wherein a fermentation tank 117 is arranged in the fermentation chamber 101, wherein the fermentation chamber 101 is provided with two front-to-back symmetrical through holes 138, wherein the through holes 138 are connected to the fermentation tank 117, wherein the front and rear end surfaces of the fermentation chamber 101 are fixedly connected with a first solenoid valve 122 located at the through holes 138, wherein a deoxygenation tank 109 fixedly connected to the upper end surface of the bottom plate 100 is arranged at the front side of the fermentation chamber 101, wherein the deoxygenation tank 109 is filled with a deoxygenation liquid 137 for absorbing oxygen, wherein an absorption tower 107 is fixedly connected to the upper end surface of the fermentation chamber 101, wherein the absorption tower 107 is provided with a through hole 138, wherein the absorption tower 107 is fixedly connected with a third solenoid valve 129 connecting the through hole 138 and the fermentation tank 117, wherein the absorption tower 107 is sealed with a sealing plate 130, and the sealing plate 130 is fixedly connected with an absorption plate 132 located in the absorption chamber 128, and the absorption plate 132 can absorb carbon dioxide gas. A one-way valve 140 is fixedly connected to the lower side of the front end surface of the deoxygenation tank 109, and the one-way valve 140 is fixedly connected to an air intake pipe 136. An air delivery pipe 134 is fixedly connected between the upper side of the rear end surface of the deoxygenation tank 109 and the first solenoid valve 122 at the front end surface of the fermentation chamber 101, so that oxygen in the air can be removed to form an anaerobic environment, so that the biomass material can generate biogas. A chip rack 102 is provided on the left side of the fermentation chamber 101, and a chip trough 112 is provided in the chip rack 102. A fermentation agent tank 104 is provided between the chip rack 102 and the fermentation chamber 101, and the fermentation agent tank 104 is filled with fermentation agent particles 125 for improving fermentation efficiency;

[0029] The upper end surface of the bottom plate 100 is fixedly connected to an air pump 108 located at the rear side of the fermentation chamber 101, the rear end surface of the air pump 108 is fixedly connected to an air outlet pipe 121, and an exhaust pipe 120 is fixedly connected between the front end surface of the air pump 108 and the first solenoid valve 122 on the rear end surface of the fermentation chamber 101, so that the air containing oxygen in the fermentation tank 117 can be extracted, and the fermentation tank 117 forms an anaerobic environment in cooperation with the deoxygenation tank 109;

[0030] The fermentation chamber 101 is provided with a feed hole 119, and the left end face of the fermentation chamber 101 is dynamically connected to an expansion rack 111 that closes the feed hole 119, and the left end face of the fermentation chamber 101 is fixedly connected to two electric slide rails 116 that are symmetrical in front and back, and the electric slide rails 116 are dynamically connected to a slider 135, and the slider 135 is fixedly connected to a sealing baffle 118, and the sealing baffle 118 is slidably connected to the expansion rack 111, and the sealing baffle 118 can close the passage of the expansion rack 111 into the fermentation tank 117, so as to cooperate with the first solenoid valve 122 and the third solenoid valve 129 to seal the fermentation tank 117, prevent the air containing oxygen from entering, maintain the anaerobic environment, and ensure the fermentation effect;

[0031] The left end face of the expansion frame 111 is fixedly connected to a material transport frame 110, the upper end face of the material transport frame 110 is fixedly connected to the lower end face of the crushing frame 102, the crushing trough 112 is communicated with the material transport frame 110, the upper end of the crushing frame 102 is fixedly connected to a fixing plate 106, the upper end face of the fixing plate 106 is fixedly connected to a motor 115, the lower end face of the fixing plate 106 is fixedly connected to a rotating shaft 113, the rotating shaft 113 is fixedly connected to three groups of cutting blades 114 which are gradually shortened from top to bottom, the motor 115 is connected to the rotating shaft 113 in power, the motor 115 can drive the cutting blades 114 to rotate quickly, so that the biomass material can be cut into smaller blocks, the contact area of ​​the fermentation is increased, and the fermentation efficiency is improved;

[0032] The upper end surface of the material transport rack 110 is fixedly connected with a connecting rack 123, and the upper end surface of the connecting rack 123 is fixedly connected with the lower end surface of the fermentation agent tank 104. The fermentation agent tank 104 has a material chamber 124 filled with the fermentation agent particles 125. The connecting rack 123 is fixedly connected with a second solenoid valve 126, and the second solenoid valve 126 is communicated with the material chamber 124. A feed pipe 127 is fixedly connected between the lower end surface of the second solenoid valve 126 and the material transport rack 110, so that the speed at which the fermentation agent particles 125 are added into the material transport rack 110 is controlled by the second solenoid valve 126, and the fermentation agent particles 125 are evenly mixed with the biomass material, thereby greatly improving the fermentation efficiency and quickly generating biogas.

[0033] The sealing plate 130 is fixedly connected with a handle 131, and the absorption plate 132 is pulled out by the handle 131. The front and rear end walls of the through hole 138 are fixedly connected with a positioning plate 139 located on the lower side of the absorption plate 132, so as to facilitate quick replacement. The upper end face of the absorption tower 107 is fixedly connected with a fuel pipe 133, and the fuel pipe 133 is connected to a storage device for methane gas. A support column 103 is fixedly connected between the material transport rack 110 and the upper end face of the base plate 100, and the support column 103 plays a supporting role. The upper end face of the base plate 100 is fixedly connected with a controller 105, and the controller 105 controls the motor 115, the second solenoid valve 126, the electric slide rail 116, the first solenoid valve 122, the third solenoid valve 129 and the air pump 108, so as to realize automatic extraction of biomass fuel.

[0034] See also Figure 1-Figure 12 , this implementation includes the following steps:

[0035] S1: First, the motor 115 is started through the controller 105, and the motor 115 drives the rotating shaft 113 to rotate, and the rotating shaft 113 drives the cutting blade 114 to rotate rapidly, and then the biomass material is put into the crushing trough 112. After the cutting blade 114 cuts the biomass material into smaller pieces, it is passed into the material transport rack 110 from the bottom, and slides down along the material transport rack 110. At the same time, the second solenoid valve 126 is started through the controller 105, and the second solenoid valve 126 passes the fermentation agent particles 125 in the material chamber 124 into the material transport rack 110 at a uniform speed through the feeding pipe 127, and the fermentation agent particles 125 are fully mixed with the biomass material, and then passed into the fermentation tank 117 from the feeding hole 119 through the expansion rack 111, thereby greatly improving the fermentation speed in the fermentation tank 117 at a later stage;

[0036] S2: Then the electric slide rail 116 is started, and the electric slide rail 116 drives the sealing baffle 118 to move upward, closing the passage of the expansion rack 111 leading to the fermentation tank 117, and cooperating with the closing of the first solenoid valve 122 and the third solenoid valve 129, so that the fermentation tank 117 forms a sealed environment, preparing for the later production of an anaerobic environment;

[0037] S3: Then, the first solenoid valves 122 on both sides of the fermentation chamber 101 are opened through the controller 105, and the air pump 108 is started. The air pump 108 draws the air in the fermentation tank 117 from the exhaust pipe 120, and discharges it to the outside through the outlet pipe 121. The outside air is introduced into the deoxygenation tank 109 from the lower side through the one-way valve 140 from the air inlet pipe 136. After the deoxygenated liquid 137 absorbs oxygen, it is introduced into the fermentation tank 117 from the air supply pipe 134 through the first solenoid valve 122, thereby creating an oxygen-free anaerobic environment in the fermentation tank 117. When there is no oxygen in the fermentation tank 117, the first solenoid valve 122 is closed, and the fermentation tank 117 is sealed to prevent the outside air from entering and maintain the anaerobic environment. Among them, the one-way valve 140 can prevent the deoxygenated liquid 137 from flowing out.

[0038] S4: After the biomass material is fermented, biogas is produced, which contains a large amount of methane and part of carbon dioxide. After a suitable time, the third solenoid valve 129 is opened, and the biogas enters the through hole 138 from the fermentation tank 117. After the carbon dioxide is absorbed by the absorption plate 132, a relatively high concentration of methane gas is discharged from the fuel pipe 133. The fuel pipe 133 is connected to a storage device for storage. The absorption plate 132 will be saturated after use. The sealing plate 130 can be pulled out through the handle 131 for quick replacement.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for extracting gaseous fuel from biomass materials, comprising a bottom plate (100), characterized in that: The right side of the upper end surface of the bottom plate (100) is fixedly connected to a fermentation chamber (101), wherein a fermentation tank (117) is arranged in the fermentation chamber (101), and the fermentation chamber (101) is provided with two front-to-back symmetrical through holes (138), wherein the through holes (138) are connected to the fermentation tank (117), and the front and rear end surfaces of the fermentation chamber (101) are fixedly connected to a first solenoid valve (122) located at the through holes (138), and the fermentation chamber (101) ) is provided with a deoxygenation tank (109) fixedly connected to the upper end surface of the bottom plate (100) on the front side, and the deoxygenation tank (109) is filled with a deoxygenation liquid (137) for absorbing oxygen, and the upper end surface of the fermentation chamber (101) is fixedly connected with an absorption tower (107), and a through hole (138) is provided in the absorption tower (107), and the absorption tower (107) is fixedly connected with a third solenoid valve (129) which communicates with the through hole (138) and the fermentation tank (117). ), the absorption tower (107) is sealed and clamped with a sealing plate (130), the sealing plate (130) is fixedly connected to an absorption plate (132) located in the absorption chamber (128), the absorption plate (132) is capable of absorbing carbon dioxide gas, the front end surface of the deoxygenation tank (109) is fixedly connected to a one-way valve (140) at the lower side, the one-way valve (140) is fixedly connected to an air inlet pipe (136), the rear end surface of the deoxygenation tank (109) is fixedly connected to the upper side An air delivery pipe (134) is fixedly connected between the first solenoid valve (122) at the front end surface of the fermentation chamber (101); a material crushing rack (102) is provided on the left side of the fermentation chamber (101); a material crushing trough (112) is provided in the material crushing rack (102); a fermentation agent tank (104) is provided between the material crushing rack (102) and the fermentation chamber (101); and fermentation agent particles (125) for improving fermentation efficiency are contained in the fermentation agent tank (104).

2. The device for extracting gas fuel from biomass materials according to claim 1, characterized in that: The upper end surface of the bottom plate (100) is fixedly connected to an air pump (108) located at the rear side of the fermentation chamber (101), the rear end surface of the air pump (108) is fixedly connected to an air outlet pipe (121), and an exhaust pipe (120) is fixedly connected between the front end surface of the air pump (108) and the first solenoid valve (122) on the rear end surface of the fermentation chamber (101).

3. The device for extracting gaseous fuel from biomass materials according to claim 2, characterized in that: The fermentation chamber (101) is provided with a feed hole (119), and the left end surface of the fermentation chamber (101) is dynamically connected to an expansion rack (111) that closes the feed hole (119), and the left end surface of the fermentation chamber (101) is fixedly connected to two electric slide rails (116) that are symmetrical in front and back, and the electric slide rails (116) are dynamically connected to a slider (135), and the slider (135) is fixedly connected to a sealing baffle (118), and the sealing baffle (118) is slidably connected to the expansion rack (111).

4. The device for extracting gaseous fuel from biomass materials according to claim 3, characterized in that: The left end face of the material expansion frame (111) is fixedly connected to a material transport frame (110); the upper end face of the material transport frame (110) is fixedly connected to the lower end face of the material crushing frame (102); the material crushing trough (112) is communicated with the material transport frame (110); the upper end of the material crushing frame (102) is fixedly connected to a fixing plate (106); the upper end face of the fixing plate (106) is fixedly connected to a motor (115); the lower end face of the fixing plate (106) is fixedly connected to a rotating shaft (113); the rotating shaft (113) is fixedly connected to three groups of cutting blades (114) which are gradually shortened from top to bottom; the motor (115) is connected to the rotating shaft (113) in power connection; the motor (115) can drive the cutting blades (114) to rotate rapidly.

5. The device for extracting gas fuel from biomass materials according to claim 4, characterized in that: The upper end surface of the material transport rack (110) is fixedly connected to a connecting rack (123), the upper end surface of the connecting rack (123) is fixedly connected to the lower end surface of the fermentation agent tank (104), the fermentation agent tank (104) is internally provided with a material chamber (124) containing the fermentation agent particles (125), the connecting rack (123) is fixedly connected to a second solenoid valve (126), the second solenoid valve (126) is communicated with the material chamber (124), and a feed pipe (127) is fixedly connected between the lower end surface of the second solenoid valve (126) and the material transport rack (110).

6. The device for extracting gas fuel from biomass materials according to claim 5, characterized in that: The sealing plate (130) is fixedly connected with a handle (131), and the absorption plate (132) is pulled out through the handle (131). The front and rear end walls of the through hole (138) are fixedly connected with a positioning plate (139) located at the lower side of the absorption plate (132). The upper end surface of the absorption tower (107) is fixedly connected with a fuel pipe (133), and the fuel pipe (133) is connected to a methane gas storage device. A support column (103) is fixedly connected between the material transport rack (110) and the upper end surface of the bottom plate (100), and the support column (103) plays a supporting role. The upper end surface of the bottom plate (100) is fixedly connected with a controller (105), and the controller (105) controls the motor (115), the second solenoid valve (126), the electric slide rail (116), the first solenoid valve (122), the third solenoid valve (129) and the air pump (108), so as to realize automatic extraction of biomass fuel.

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