Biochar furnace with smoke dust filtering structure

Abstract

The invention discloses a charcoal furnace with a smoke dust filtering structure, the charcoal furnace comprises a furnace body, the upper end of the furnace body is communicated with a smoke gas conveying pipe, smoke dust in the smoke gas conveying pipe is discharged through a filtering assembly, and the filtering assembly comprises an adhesion filtering box and an adsorption filtering cylinder. The device disclosed by the invention has the beneficial effects that smoke dust generated after biochar combustion mainly contains substances such as tar and combustion ash, most of the tar and the combustion ash are subjected to adhesion treatment through the adhesion filter box, and then the residual tar and the combustion ash are further subjected to adsorption treatment through the adsorption filter cartridge; harmful substances contained in the smoke dust are greatly reduced; by arranging the air inlet pipe, oxygen can be supplemented into the inner cavity to maintain normal combustion of the biochar, gas can be driven to flow, smoke generated by combustion can be conveniently discharged from the smoke conveying pipe, and due to the fact that the air inlet pipe can rotate, the air inlet pipe can be aligned with different parts of the biochar placed in the furnace to conduct air blowing; and the charcoal in the furnace can be quickly and uniformly combusted.

Description

Technical Field

[0001] The invention relates to a biochar stove, in particular to a biochar stove provided with a smoke and dust filtering structure, belonging to the technical field of incinerator structures. Background Art

[0002] A biochar stove is a furnace structure that uses biochar as a combustion raw material. During the combustion process, biochar will produce tar and some combustion ash, which will be discharged along with the smoke. Therefore, in order to avoid affecting the environment, it is necessary to filter out the tar, ash and other impurities in the smoke before discharging them.

[0003] In the prior art, a biochar stove disclosed in announcement number CN114234176A optimizes the setting of the furnace structure and adds a smoke exhaust mechanism to filter the exhausted smoke. The bottom base of the furnace body is cast with reinforced concrete. The steel furnace body and the heat insulation layer built with refractory bricks can achieve effective fire-resistant and heat-insulating effects. The water-sealed structure provided at the connection between the furnace cover and the furnace body can further enhance the sealing and smoke-isolating effect of the furnace body, thereby ensuring the overall environmental protection effect. However, in actual use, since the smoke contains harmful substances including tar and burning ashes, etc., in the prior art, although a filter plate is provided to filter the smoke, filter material is filled between the filter plates. Although it can filter to a certain extent, if the filter material is filled too much, it will It affects the normal passage of smoke, that is, it is not conducive to the smooth discharge of smoke, and will cause smoke accumulation in the furnace body. Too much smoke will also affect the normal combustion of biochar. Secondly, it is only filtered through a single filter material, and the filtration effect cannot be optimized, that is, it cannot ensure that the debris in the smoke is completely filtered out, and because tar has strong adhesion, it will easily be blocked in the gaps of the filter material during filtration, which will cause the filter material to need to be cleaned once a short time of use. In addition, since it is necessary to ensure sufficient oxygen when biochar is burned, a ventilation and air intake assembly is an essential structure of the biochar furnace. However, the prior art only considers the size of the ventilation volume when ventilating and air intake, but fails to perform targeted ventilation for different combustion parts, so the actual ventilation promotes combustion The effect is not obvious. Summary of the invention

[0004] The purpose of the present invention is to provide a biochar stove with a smoke filtering structure in order to solve the problem that the prior art cannot achieve thorough smoke filtering and cannot provide targeted ventilation for different combustion parts.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions: a biochar stove with a smoke dust filtering structure comprises a stove body, the upper end of the stove body is connected with a smoke conveying pipe, the smoke in the smoke conveying pipe is discharged through a filtering assembly, and an air inlet pipe is arranged in the stove body; The filter assembly includes an adhesion filter box and an adsorption filter cartridge. The adhesion filter box is connected to the pipe body of the flue gas conveying pipe. The adsorption filter cartridge is arranged on one side of the furnace body, and the conveying end of the flue gas conveying pipe is inserted in the adsorption filter cartridge. The smoke dust after combustion is adsorbed and filtered by the adhesion filter box and the adsorption filter cartridge before being discharged. The smoke dust after the combustion of biochar mainly contains substances such as tar and combustion ash. First, most of the tar and combustion ash are subjected to adhesion treatment by the adhesion filter box, and then the remaining tar and combustion ash are further adsorbed by the adsorption filter cartridge, which can greatly reduce the harmful substances contained in the smoke dust. The air inlet pipes are rotatably arranged on both sides of the furnace body, and the air inlet pipes are connected to a plurality of air outlets on one side of the furnace body cavity. The air outlets are used to blow air into the furnace body cavity, which can replenish oxygen into the cavity to maintain the normal combustion of biochar. On the other hand, it can also drive the flow of gas so that smoke generated by combustion can be discharged from the smoke conveying pipe. Moreover, since the air inlet pipes can be rotated, they can be blown at different parts of the biochar placed in the furnace, so that the biochar in the furnace can be burned quickly and evenly.

[0006] As a further solution of the present invention: the furnace body includes a refractory inner wall and an outer wall, the refractory inner wall is arranged on the inner side of the outer wall, the refractory inner wall includes but is not limited to a brick-concrete structure, and the outer wall includes but is not limited to aluminum alloy, ceramic or stainless steel.

[0007] As a further solution of the present invention: a furnace door is movably connected to the front opening of the furnace body, and a furnace mesh plate is horizontally connected to the inner cavity of the furnace body.

[0008] As a further solution of the present invention: a plurality of adhesion plates are arranged in the adhesion filter box, the adhesion plates are arranged in an inclined shape along the flow direction of the smoke, the adhesion plates are respectively connected to the upper and lower inner walls of the adhesion filter box, and the adhesion plates located on the upper and lower sides are arranged in a staggered shape; Furthermore, docking flange seats are provided at both ends of the attached filter box, a docking flange plate is provided on the pipe body of the smoke conveying pipe, and the attached filter box and the smoke conveying pipe are combined together by bolt connection of the docking flange seat and the docking flange plate.

[0009] As a further solution of the present invention: air inlet duct grooves are opened on both sides and the back side of the furnace body, and the air inlet duct grooves are located below the furnace mesh plate. A blower is arranged on the back side of the furnace body, and an air duct is connected to the air outlet of the blower.

[0010] As a further solution of the present invention: the adsorption filter cartridge contains an adsorption solvent, the delivery end of the smoke delivery pipe extends to the bottom of the liquid surface of the adsorption solvent, and the adsorption filter cartridge is also connected to a smoke exhaust pipe, and the bottom end of the smoke exhaust pipe is located above the liquid surface of the adsorption solvent.

[0011] As a further solution of the present invention: the adsorption solvent includes but is not limited to water, a liquid inlet is provided at the upper end of the adsorption filter cartridge, a liquid discharge port is provided at the bottom end of the side wall of the adsorption filter cartridge, and sealing caps are threadedly connected to the liquid inlet and the liquid discharge port.

[0012] As a further solution of the present invention: both air inlet pipes are connected to the air storage pipe, and a sealed bearing is provided at the connection between the air inlet pipe and the air storage pipe, the air storage pipe is embedded in the air inlet pipe groove opened on the back side of the furnace body, and the air storage pipe is connected to the air guide pipe.

[0013] As a further solution of the present invention: a driven rack is fixedly connected to the body of the air inlet duct, the driven rack is meshingly connected with an adjusting gear, the adjusting gear is rotatably connected to the two side walls of the furnace body, and some gears of the adjusting gear are located outside the furnace body.

[0014] As a further solution of the present invention: the driven rack matches the curvature of the tube body of the air inlet pipe, and the driven rack is wrapped around a quarter of the cross-section of the tube body of the air inlet pipe.

[0015] The beneficial effects of the present invention are: By providing an adhesion filter box and an adsorption filter cartridge, the adhesion filter box and the adsorption filter cartridge adsorb and filter the smoke after combustion before discharging. The smoke after the combustion of biochar mainly contains substances such as tar and combustion ash. First, most of the tar and combustion ash are subjected to adhesion treatment by the adhesion filter box, and then the remaining tar and combustion ash are further adsorbed by the adsorption filter cartridge, which can greatly reduce the harmful substances contained in the smoke; By providing an air inlet pipe, the air inlet pipe is rotatably arranged on both sides of the furnace body, and a plurality of air outlet nozzles are connected to one side of the air inlet pipe facing the inner cavity of the furnace body. The air outlet nozzles blow air into the inner cavity of the furnace body. On the one hand, oxygen can be added to the inner cavity to maintain the normal combustion of the biochar. On the other hand, the gas flow can be driven so that the smoke generated by the combustion is discharged from the smoke conveying pipe. Moreover, since the air inlet pipe can be rotated, it can be aimed at different parts of the biochar placed in the furnace to blow air, so that the biochar in the furnace can be burned quickly and evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 It is a rear view structural schematic diagram of the present invention; Figure 3It is a schematic diagram of the cross-sectional structure of the furnace body of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the structure at A in the middle; Figure 5 This is a schematic diagram of the cross-sectional structure of the adhesion filter box of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the adsorption filter cartridge of the present invention; Figure 7 It is a schematic diagram of the air inlet pipe connection structure of the present invention.

[0017] In the figure: 1, furnace body, 11, refractory inner wall, 12, furnace outer wall, 13, furnace mesh plate, 14, air inlet pipe groove, 2, furnace door, 3, flue gas conveying pipe, 4, attachment filter box, 41, attachment plate, 5, adsorption filter cartridge, 51, adsorption solvent, 52, liquid inlet, 53, liquid discharge port, 6, smoke exhaust duct, 7, blower, 71, air guide duct, 8, air inlet pipe, 81, air outlet nozzle, 82, air storage pipe, 83, sealed bearing, 84, driven rack, 85, adjusting gear. DETAILED DESCRIPTION

[0018] 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. Embodiment 1

[0019] like Figures 1 to 7 As shown, a biochar stove with a smoke dust filtering structure comprises a stove body 1, the upper end of the stove body 1 is connected with a smoke conveying pipe 3, the smoke in the smoke conveying pipe 3 is discharged through a filtering assembly, and an air inlet pipe 8 is arranged in the stove body 1; The filter assembly includes an adhesion filter box 4 and an adsorption filter cartridge 5. The adhesion filter box 4 is connected to the pipe body of the flue gas conveying pipe 3. The adsorption filter cartridge 5 is arranged on one side of the furnace body 1, and the conveying end of the flue gas conveying pipe 3 is inserted in the adsorption filter cartridge 5. The smoke dust after combustion is adsorbed and filtered by the adhesion filter box 4 and the adsorption filter cartridge 5 before being discharged. The smoke dust after the combustion of biochar mainly contains substances such as tar and combustion ash. First, most of the tar and combustion ash are subjected to adhesion treatment by the adhesion filter box 4, and then the remaining tar and combustion ash are further adsorbed by the adsorption filter cartridge 5, which can greatly reduce the harmful substances contained in the smoke dust. The air inlet pipes 8 are rotatably arranged on both sides of the furnace body 1, and the air inlet pipes 8 are connected to a side of the inner cavity of the furnace body 1 with a plurality of air outlet nozzles 81. The inner cavity of the furnace body 1 is blown through the air outlet nozzles 81. On the one hand, oxygen can be added to the inner cavity to maintain the normal combustion of biochar. On the other hand, the flow of gas can be driven so that smoke generated by the combustion is discharged from the smoke conveying pipe 3. Moreover, since the air inlet pipe 8 can be rotated, it can be aimed at different parts of the biochar placed in the furnace for blowing, so that the biochar in the furnace can be burned quickly and evenly. Embodiment 2

[0020] In addition to all the technical features of the first embodiment, this embodiment also includes: The furnace body 1 includes a refractory inner wall 11 and an outer wall 12. The refractory inner wall 11 is arranged on the inner side of the outer wall 12. The refractory inner wall 11 includes but is not limited to a brick-concrete structure, and the outer wall 12 includes but is not limited to aluminum alloy, ceramic or stainless steel. The outer wall 12 can be used to make the biochar furnace have better external structural strength, while the refractory inner wall 11 arranged on the inner side has better fire resistance.

[0021] A furnace door 2 is movably connected to the front opening of the furnace body 1, and a furnace mesh plate 13 is horizontally connected to the inner cavity of the furnace body 1. The inner cavity of the furnace body 1 can be divided into two upper and lower parts by the furnace mesh plate 13. The furnace door 2 can be opened to place the biochar on the furnace mesh plate 13 for combustion, and the carbon slag produced by the combustion can fall under the furnace mesh plate 13, thereby facilitating the cleaning of the slag. Embodiment 3

[0022] In addition to all the technical features of the first embodiment, this embodiment also includes: A plurality of adhesion plates 41 are arranged in the adhesion filter box 4. The adhesion plates 41 are arranged in an inclined shape along the flow direction of the smoke. The adhesion plates 41 are respectively connected to the upper and lower inner walls of the adhesion filter box 4, and the adhesion plates 41 located on the upper and lower sides are arranged in a staggered shape, so that the smoke passing through the adhesion filter box 4 can contact the adhesion plates 41 respectively, so that the viscous substances such as tar in the smoke are retained on the adhesion plates 41. Moreover, since the adhesion plates 41 on the upper and lower sides are arranged in a staggered shape, even if there is a lot of tar on the plate body of the adhesion plate 41, it will not affect the smooth flow of the smoke. Furthermore, docking flange seats are provided at both ends of the attached filter box 4, a docking flange plate is provided on the pipe body of the flue gas conveying pipe 3, and the attached filter box 4 and the flue gas conveying pipe 3 are combined together by bolt connection of the docking flange seat and the docking flange plate, which can facilitate the disassembly and installation of the attached filter box 4, and then facilitate the regular cleaning of the attached filter box 4 to remove tar, burning ashes and other debris accumulated in the box, so that the attached filter box 4 can continue to have a good filtering effect.

[0023] Air inlet pipe grooves 14 are provided on both sides and the back side of the furnace body 1, and the air inlet pipe grooves 14 are located below the furnace mesh plate 13. A blower 7 is provided on the back side of the furnace body 1, and an air guide duct 71 is connected to the air outlet of the blower 7. The air inlet pipe 8 can be embedded in the air inlet pipe grooves 14, and the air intake volume can be provided to the air inlet pipe 8 through the blower 7. The air inlet pipe 8 is provided below the furnace mesh plate 13 to supplement oxygen from the bottom of the furnace mesh plate 13 to ensure that the biochar can be fully burned.

[0024] The adsorption filter cartridge 5 contains an adsorption solvent 51, and the conveying end of the smoke conveying pipe 3 extends to the bottom of the liquid surface of the adsorption solvent 51. The adsorption filter cartridge 5 is also connected to a smoke exhaust pipe 6, and the bottom end of the smoke exhaust pipe 6 is located above the liquid surface of the adsorption solvent 51. The smoke can be directly discharged into the adsorption solvent 51, so that the smoke can fully contact the adsorption solvent 51, and further fully filter the residual tar, burning ash and other impurities in the smoke, and then directly discharge them through the smoke exhaust pipe 6.

[0025] The adsorption solvent 51 includes but is not limited to water. A liquid inlet 52 is provided at the upper end of the adsorption filter cartridge 5, and a liquid discharge port 53 is provided at the bottom end of the side wall of the adsorption filter cartridge 5. Sealing covers are threadedly connected to the liquid inlet 52 and the liquid discharge port 53, so that the adsorption solvent 51 can be easily replenished into the adsorption filter cartridge 5 through the liquid inlet 52, and the adsorption solvent 51 that has been used for a long time can be discharged through the liquid discharge port 53, that is, the adsorption solvent 51 in the cartridge can be replaced, so that the adsorption filter cartridge 5 can continue to have a good filtering effect. Embodiment 4

[0026] In addition to all the technical features of the first embodiment, this embodiment also includes: The two air inlet pipes 8 are both connected to the air storage pipe 82, and a sealed bearing 83 is provided at the connection between the air inlet pipe 8 and the air storage pipe 82. The air storage pipe 82 is embedded in the air inlet pipe groove 14 opened on the back side of the furnace body 1, and the air storage pipe 82 is connected to the air guide pipe 71, so that the air storage pipe 82 can provide an equal amount of air intake to the two air inlet pipes 8, thereby providing stable air supply on both sides of the furnace body to facilitate the combustion of biochar, and the air inlet pipe 8 can also rotate smoothly under the action of the sealed bearing 83.

[0027] A driven rack 84 is fixedly connected to the body of the air inlet pipe 8, and the driven rack 84 is meshed with an adjusting gear 85. The adjusting gear 85 is rotatably connected to the two side walls of the furnace body 1, and some gears of the adjusting gear 85 are located on the outside of the furnace body 1, so that the adjusting gear 85 can be rotated from the outside, thereby driving the air inlet pipe 8 to rotate.

[0028] The driven rack 84 matches the curvature of the air inlet pipe 8 and is wrapped around a quarter of the cross section of the air inlet pipe 8 so that the rotation range of the air inlet pipe 8 is only 90°, thereby avoiding rotating the air outlet nozzle 81 away from the inner cavity of the furnace body 1.

[0029] Working principle: the furnace door 2 is opened to place the biochar on the furnace mesh plate 13 for combustion, and the charcoal slag produced by the combustion can fall under the furnace mesh plate 13, and the inner cavity of the furnace body 1 is blown through the air outlet nozzle 81. On the one hand, oxygen can be added to the inner cavity to maintain the normal combustion of the biochar. The tar and combustion ash contained in the smoke after the biochar is burned are firstly processed by the adhesion filter box 4 to adhere most of the tar and combustion ash, and then the remaining tar and combustion ash are further adsorbed through the adsorption filter cartridge 5, which can greatly reduce the harmful substances contained in the smoke.

[0030] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A biochar stove with a smoke filtering structure, comprising a stove body (1), characterized in that: The upper end of the furnace body (1) is connected to a smoke conveying pipe (3), smoke in the smoke conveying pipe (3) is discharged through a filter assembly, and an air inlet pipe (8) is provided in the furnace body (1); The filter assembly comprises an adhesion filter box (4) and an adsorption filter cartridge (5); the adhesion filter box (4) is connected to the pipe body of the smoke conveying pipe (3); the adsorption filter cartridge (5) is arranged on one side of the furnace body (1); and the conveying end of the smoke conveying pipe (3) is inserted into the adsorption filter cartridge (5); The air inlet pipes (8) are rotatably arranged on both sides of the furnace body (1), and the side of the air inlet pipe (8) facing the inner cavity of the furnace body (1) is connected to a plurality of air outlet nozzles (81).

2. The biochar stove with a smoke filtering structure according to claim 1 is characterized in that: The furnace body (1) comprises a refractory inner wall (11) and a furnace outer wall (12), wherein the refractory inner wall (11) is arranged on the inner side of the furnace outer wall (12), the refractory inner wall (11) includes but is not limited to a brick-concrete structure, and the furnace outer wall (12) includes but is not limited to an aluminum alloy, ceramic or stainless steel material.

3. The biochar stove with a smoke filtering structure according to claim 2 is characterized in that: A furnace door (2) is movably connected to the front opening of the furnace body (1), and a furnace mesh plate (13) is horizontally connected to the inner cavity of the furnace body (1).

4. The biochar stove with a smoke filtering structure according to claim 1, characterized in that: A plurality of adhesion plates (41) are arranged in the adhesion filter box (4), the adhesion plates (41) are arranged in an inclined shape along the flow direction of the smoke, the adhesion plates (41) are respectively connected to the upper and lower inner walls of the adhesion filter box (4), and the adhesion plates (41) located on the upper and lower sides are arranged in a staggered shape; A docking flange seat is provided at both ends of the attached filter box (4), a docking flange plate is provided on the pipe body of the smoke conveying pipe (3), and the attached filter box (4) and the smoke conveying pipe (3) are assembled together by bolt connection between the docking flange seat and the docking flange plate.

5. The biochar stove with a smoke filtering structure according to claim 1, characterized in that: Air inlet pipe grooves (14) are provided on both sides and the back side of the furnace body (1), and the air inlet pipe grooves (14) are located below the furnace mesh plate (13). A blower (7) is provided on the back side of the furnace body (1), and an air outlet of the blower (7) is connected to an air guide pipe (71).

6. The biochar stove with a smoke filtering structure according to claim 1, characterized in that: The adsorption filter cartridge (5) contains an adsorption solvent (51), the delivery end of the smoke delivery pipe (3) extends to the bottom of the liquid surface of the adsorption solvent (51), and the adsorption filter cartridge (5) is also connected to a smoke exhaust pipe (6), and the bottom end of the smoke exhaust pipe (6) is located above the liquid surface of the adsorption solvent (51).

7. The biochar stove with a smoke and dust filtering structure according to claim 6, characterized in that: The adsorption solvent (51) includes but is not limited to water. The upper end of the adsorption filter cartridge (5) is provided with a liquid inlet (52), the lower end of the side wall of the adsorption filter cartridge (5) is provided with a liquid discharge port (53), and the liquid inlet (52) and the liquid discharge port (53) are both threadedly connected with a sealing cap.

8. The biochar stove with a smoke filtering structure according to claim 1, characterized in that: The two air inlet pipes (8) are both connected to the air storage pipe (82), and a sealing bearing (83) is provided at the connection between the air inlet pipe (8) and the air storage pipe (82). The air storage pipe (82) is embedded in an air inlet pipe groove (14) provided on the back side of the furnace body (1), and the air storage pipe (82) is connected to the air guide pipe (71).

9. The biochar stove with a smoke filtering structure according to claim 8, characterized in that: A driven rack (84) is fixedly connected to the body of the air inlet pipe (8), the driven rack (84) is meshingly connected to an adjusting gear (85), the adjusting gear (85) is rotatably connected to the two side walls of the furnace body (1), and part of the gear of the adjusting gear (85) is located outside the furnace body (1).

10. The biochar stove with a smoke and dust filtering structure according to claim 9, characterized in that: The driven rack (84) matches the curvature of the tube body of the air inlet pipe (8), and the driven rack (84) wraps around a quarter of the cross section of the tube body of the air inlet pipe (8).

Images