Biomass drying furnace capable of being used outdoors

Abstract

The utility model relates to the technical field of drying furnaces, and discloses a biomass drying furnace capable of being used outdoors, which comprises a combustion chamber, an air flow exchange layer, a hot air port, a smoke outlet channel and a furnace body shell, the combustion chamber comprises a first hearth, round pipes and a second hearth, and a plurality of round pipes are uniformly arranged in the second hearth along the circumferential direction of the section; an airflow exchange layer is arranged in the furnace body shell, a combustion chamber is arranged in the airflow exchange layer, a feeding port is formed in one side face of the furnace body shell and communicated with the other end of the first hearth, the second hearth is communicated with a smoke outlet channel, and the other end of the smoke outlet channel extends out of the furnace body shell. A hot air opening is formed in the top face of the furnace body shell, and the hot air opening communicates with the airflow exchange layer. Biomass combustion heat is fully absorbed through the multiple round pipes, the efficiency is improved, the smoke outlet adjusting valve and the air inlet adjusting valve are matched to control the combustion speed and the biomass combustion degree, and the purpose of saving energy is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of drying furnace, specifically to a kind of outdoor use's biomass drying furnace. BACKGROUND

[0002] The biomass drying furnace is a drying equipment using biomass as fuel, mainly used for drying various materials. In use, the biomass drying furnace has the characteristics of energy saving and environmental protection, simple operation, good drying effect and convenient maintenance. It uses biomass fuel, reduces the dependence on traditional energy, conforms to the environmental protection concept, and is easy to operate. At the same time, the drum drying method of biomass drying furnace can ensure uniform drying, accurate control of particle moisture, and significant drying effect.

[0003] The heat exchange mode of biomass drying furnace mainly includes direct combustion heat exchange and indirect heat exchange. Direct combustion heat exchange is the working principle of direct-fired hot blast stove, which produces high-temperature flue gas hot air by directly burning biomass fuel such as wood chips and straw, and directly acts on the surface of the drying product to play the role of heating and drying. This method is suitable for products with low production cleanliness requirements. Indirect heat exchange is to use heat transfer oil, steam, high-temperature flue gas as heat exchange carrier, and heat air through various heat exchangers to produce hot air for drying products. Such hot blast stove exchanges heat by indirect heating of hot air, which is better than direct-fired hot blast stove in cleanliness, and is generally used in industries with cleanliness requirements.

[0004] However, the direct combustion heat exchange in the prior art is suitable for products with low cleanliness requirements, and the application range is narrow, and the second indirect heat exchange has high cost. In order to solve the above problems, we propose a kind of outdoor use's biomass drying furnace. UTILITY MODEL CONTENT

[0005] The utility model aims to provide a kind of outdoor use's biomass drying furnace to solve the problems raised in the above background.

[0006] To achieve the above purpose, the utility model provides the following technical scheme: a kind of outdoor use's biomass drying furnace, including combustion chamber, airflow exchange layer, heat preservation layer, hot blast port, smoke outlet channel and furnace body shell;

[0007] The combustion chamber includes a first hearth, a circular tube and a second hearth;A plurality of circular tubes are uniformly arranged along the cross-sectional circumference in the second hearth;The first hearth is communicated with one end of the second hearth;

[0008] The furnace body shell is internally provided with the air flow exchange layer; the air flow exchange layer is internally provided with the combustion chamber; one side of the furnace body shell is provided with a feeding port; the feeding port of the side of the furnace body shell is communicated with the other end of the first hearth; the other end of the second hearth is communicated with one end of the smoke outlet channel; the other end of the smoke outlet channel extends out of the furnace body shell; both ends of the circular pipe are communicated with the air flow exchange layer; the top surface of the furnace body shell is provided with a hot air outlet; the hot air outlet is communicated with the air flow exchange layer; the inner side wall of the furnace body shell and the outer side wall of the air flow exchange layer are provided with the heat preservation layer.

[0009] Preferably, the furnace body shell is internally provided with a positioning plate; the positioning plate is rectangular; one sleeve is arranged at each of the four top corners of the positioning plate; an axial flow fan is arranged in the sleeve; one end of the sleeve is communicated with the air flow exchange layer; a feeding port panel is arranged on one side of the feeding port of the furnace body shell; the feeding port panel is provided with four openings; the other end of the sleeve is communicated with the openings of the feeding port panel.

[0010] Preferably, a filter screen exhaust cover is arranged at each of the four openings of the feeding port panel.

[0011] Preferably, the air flow exchange layer is cylindrical; the end of the sleeve communicated with the air flow exchange layer is inclined towards the hearth.

[0012] Preferably, a plurality of guide plates are uniformly arranged along the cross-sectional circumference of the outer side wall of the second hearth.

[0013] Preferably, a smoke outlet adjusting valve is arranged in the smoke outlet channel; the smoke outlet adjusting valve comprises a threaded rotating shaft, a positioning bolt, a torsion spring, an adjusting plate and an adjusting handle;

[0014] One side of the adjusting plate is rotationally connected to the side wall of the smoke outlet channel through the threaded rotating shaft; the threaded rotating shaft is provided with the positioning bolt for positioning and tightening; one end of the adjusting handle is connected to the threaded rotating shaft; the threaded rotating shaft is fixedly connected to the adjusting plate; the torsion spring is sleeved on the adjusting handle; one end of the torsion spring is connected to the side wall of the smoke outlet channel; the other end of the torsion spring is connected to the adjusting handle.

[0015] Preferably, an open cavity is arranged at the position close to the bottom surface of the furnace body shell; an air inlet is arranged at the bottom of the second hearth; the air inlet of the second hearth is communicated with the open cavity of the furnace body shell; an air inlet adjusting valve is arranged at the air inlet of the bottom surface of the second hearth; the air inlet adjusting valve comprises a slide channel, a slide plate, a pull rod and a positioning sleeve; the positioning sleeve is arranged on the top surface of the open cavity of the furnace body shell; the pull rod is slidingly connected in the positioning sleeve; the slide channel is arranged on the side wall of the open cavity of the furnace body shell; the slide plate is slidingly connected to the slide channel; the pull rod is connected to one side wall of the slide plate.

[0016] Preferably, the second hearth bottom air inlet is provided with an ash removal device; the ash removal device comprises an ash removal port and an ash receiving box; the ash removal port is communicated with the second hearth bottom air inlet; and the ash receiving box is slidingly connected in the open chamber of the furnace body shell.

[0017] Compared with the prior art, the biomass drying furnace has the advantages that:

[0018] 1. The biomass combustion heat is fully absorbed by the plurality of circular pipes, and the efficiency is improved;

[0019] 2. The four axial flow fans blow air from four directions to the front end of the first hearth, and the air flow is transmitted to the rear end through the uniformly distributed circular pipes and the guide plates, and is discharged through the hot air outlet, which can be used for fruit and vegetable drying, heating and the like;

[0020] 3. The sleeve is obliquely arranged to perform oblique orientation air inlet, so as to ensure that the air inlet direction is perpendicular to the cross section of the circular pipe;

[0021] 4. The air inlet amount adjusting valve can adjust the air inlet amount according to the heating demand of combustion, so as to control the combustion speed; the smoke outlet adjusting valve is arranged at the smoke outlet, and the combustion speed and the biomass combustion degree are better controlled in cooperation with the air inlet amount adjusting valve, so that the energy saving purpose is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a partial sectional schematic view of the overall structure of the utility model;

[0023] Figure 2 It is a main view sectional schematic view of the overall structure of the utility model;

[0024] Figure 3 It is Figure 2 It is a top view of A in the middle;

[0025] Figure 4 It is a structure schematic view of the combustion chamber provided with the guide plate in the utility model;

[0026] Figure 5 It is a left view schematic view of the combustion chamber provided with the guide plate in the utility model;

[0027] Figure 6 It is an assembly schematic view of the sleeve, the axial flow fan and the positioning plate in the utility model;

[0028] Figure 7 It is a right view assembly schematic view of the sleeve, the axial flow fan and the positioning plate in the utility model;

[0029] Figure 8 It is a main view assembly schematic view of the sleeve, the axial flow fan and the positioning plate in the utility model;

[0030] Figure 9 It is the whole structure left view part section view schematic diagram of the utility model.

[0031] In the figure: 1 - combustion chamber, 11 - first hearth, 12 - round pipe, 13 - second hearth, 2 - air flow exchange layer, 21 - guide plate, 22 - sleeve, 23 - axial flow fan, 24 - positioning plate, 3 - heat preservation layer, 4 - hot air port, 5 - smoke outlet adjusting valve, 51 - threaded rotating shaft, 52 - positioning bolt, 53 - torsion spring, 54 - adjusting plate, 55 - adjusting handle, 6 - smoke outlet passage, 7 - air inlet adjusting valve, 71 - slide, 72 - slide plate, 73 - pull rod, 74 - positioning sleeve, 8 - ash removal device, 81 - ash removal port, 82 - ash receiving box, 9 - furnace body shell, 91 - feeding port panel, 92 - filter screen exhaust hood. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0033] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 The utility model provides a kind of technical scheme: a kind of outdoor use's biomass drying furnace, including combustion chamber 1, air flow exchange layer 2, heat preservation layer 3, hot air port 4, smoke outlet passage 6 and furnace body shell 9.

[0034] The combustion chamber 1 includes first hearth 11, round pipe 12 and second hearth 13, multiple round pipes 12 are evenly provided in the second hearth 13 along the cross section circumference, and the first hearth 11 is communicated with one end of the second hearth 13.

[0035] The furnace body shell 9 is internally provided with the airflow exchange layer 2, the airflow exchange layer 2 is internally provided with the combustion chamber 1, one side of the furnace body shell 9 is provided with a feeding port, the feeding port of the side of the furnace body shell 9 is communicated with the other end of the first hearth 11, the other end of the second hearth 13 is communicated with one end of the smoke outlet channel 6, the other end of the smoke outlet channel 6 extends out of the furnace body shell 9, both ends of the circular tube 12 are communicated with the airflow exchange layer 2, the top surface of the furnace body shell 9 is provided with a hot air outlet 4, the hot air outlet 4 is communicated with the airflow exchange layer 2, the inner side wall of the furnace body shell 9 and the outer side wall of the airflow exchange layer 2 are provided with the heat preservation layer 3.

[0036] The application can be used for rural heating, greenhouse heating and other occasions, and actually provides a heat source. The heat preservation layer 3 between the inner side wall of the furnace body shell 9 and the outer side wall of the airflow exchange layer 2 can place the drying furnace outside, and solve the problems of biomass combustion pollution and carbon monoxide poisoning.

[0037] Further, the furnace body shell 9 is internally provided with a positioning plate 24, the positioning plate 24 is rectangular, one sleeve 22 is arranged at each of the four top corners of the positioning plate 24, an axial flow fan 23 is arranged in the sleeve 22, one end of the sleeve 22 is communicated with the airflow exchange layer 2, a feeding port panel 91 is arranged on one side of the feeding port of the furnace body shell 9, the feeding port panel 91 is provided with four openings, and the other end of the sleeve 22 is communicated with the openings of the feeding port panel 91.

[0038] In the application, the combustion chamber 1 is cylindrical, a plurality of circular tubes 12 are uniformly arranged along the cross-sectional circumference of the second hearth 13, as shown in the figure, the difference between every two circular tubes 12 is 15°, and the biomass combustion heat is fully absorbed to improve the efficiency. Figure 5

[0039] The circular tube 12 is heated in the second hearth 13 to form a tube heat exchanger. The combustion chamber 1 is arranged in the airflow exchange layer 2, the hot air circulation is formed from the front end to the rear end by the axial flow fan 23, and is discharged by the hot air outlet 4. The furnace body shell 9 is internally provided with the heat preservation layer 3, the heat preservation layer 3 is heat-insulated by aluminum silicate needle-punched cotton, so as to ensure that the heat is not lost and dissipated.

[0040] ​Inside the furnace shell 9, there are a guide plate 21, a sleeve 22, an axial flow fan 23 and a positioning plate 24. The four axial flow fans 23 blow air from four directions to the front end of the first furnace chamber 11. The airflow is transmitted to the rear end through the evenly distributed circular pipe 12 and the guide plate 21, and is discharged through the hot air outlet 4. It can be used for fruit and vegetable drying and heating, heating and other occasions.

[0041] The four sleeves 22 are positioned relative to each other by a positioning plate 24 with slits on all four sides to ensure that the four sleeves 22 are installed at the same angle. The axial flow fan 23 is installed inside each sleeve 22. Figure 7 , Figure 8 As shown, one end of the sleeve 22 connected to the airflow exchange layer 2 is at a 40° angle to the horizontal plane parallel to the ground, and the other end of the sleeve 22 connected to the airflow exchange layer 2 is at a 50° angle to the vertical plane perpendicular to the ground, so as to ensure that the air intake direction is perpendicular to the cross-section of the multiple circular pipes 12.

[0042] Twenty-four circular tubes 12 are evenly arranged circumferentially along the cross-section of the second furnace chamber 13 to form a heat exchanger. Each pair of circular tubes 12 is spaced about 10 mm apart and is evenly distributed at a 15° angle to the central axis of the second furnace chamber 13. The front end of each circular tube 12 is inclined. The connection surface between the second furnace chamber 13 and the first furnace chamber 11 is inclined. The connection surface between the second furnace chamber 13 and the first furnace chamber 11 is at a 55° angle to the outer side of the second furnace chamber 13, thus forming a perpendicularity to the air inlet direction of the four sleeves 22, which ensures heat exchange efficiency and allows complete combustion of biomass.

[0043] Furthermore, each of the four openings of the feed inlet panel 91 is equipped with a filter screen exhaust hood 92.

[0044] The feed inlet panel 91 is designed to be detachable. A filter exhaust hood 92 is designed at the opening of the feed inlet panel 91. The opening of the feed inlet panel 91 behind the filter exhaust hood 92 is connected to the sleeve 22 and the axial flow fan 23 to ensure unobstructed airflow and prevent foreign objects from entering. The feed inlet panel 91 is equipped with a fan speed controller, switch and power socket, which can adjust the intake air volume and size. The detachable design facilitates the replacement and maintenance of the axial flow fan 23 and circuit.

[0045] Furthermore, the airflow exchange layer 2 is cylindrical, and the sleeve 22 is connected to the airflow exchange layer 2 at one end, which is inclined towards the first furnace chamber 11.

[0046] Furthermore, the outer wall of the second furnace 13 is uniformly provided with a plurality of guide plates 21 along the circumferential direction of the cross section.

[0047] Further, the smoke outlet passage 6 is provided with a smoke outlet adjusting valve 5, the smoke outlet adjusting valve 5 comprises a threaded rotating shaft 51, a positioning bolt 52, a torsion spring 53, an adjusting plate 54 and an adjusting handle 55.

[0048] One side of the adjusting plate 54 is rotationally connected to the side wall of the smoke outlet passage 6 through the threaded rotating shaft 51, the threaded rotating shaft 51 is provided with the positioning bolt 52 for positioning and tightening, one end of the adjusting handle 55 is connected to the threaded rotating shaft 51, the threaded rotating shaft 51 is fixedly connected to the adjusting plate 54, the torsion spring 53 is sleeved on the adjusting handle 55, one end of the torsion spring 53 is connected to the side wall of the smoke outlet passage 6, and the other end of the torsion spring 53 is connected to the adjusting handle 55.

[0049] Further, the furnace body shell 9 is provided with an open cavity near the bottom surface, the second hearth 13 is provided with an air inlet at the bottom, the air inlet of the second hearth 13 is communicated with the open cavity of the furnace body shell 9, the air inlet at the bottom surface of the second hearth 13 is provided with an air inlet adjusting valve 7, the air inlet adjusting valve 7 comprises a slide 71, a slide plate 72, a pull rod 73 and a positioning sleeve 74, the positioning sleeve 74 is arranged on the top surface of the open cavity of the furnace body shell 9, the pull rod 73 is slidingly connected in the positioning sleeve 74, the slide 71 is arranged on the side wall of the open cavity of the furnace body shell 9, the slide plate 72 is slidingly connected to the slide 71, and the pull rod 73 is connected to one side wall of the slide plate 72.

[0050] The air inlet adjusting valve 7 arranged at the air inlet at the bottom surface of the second hearth 13 can adjust the air inlet according to the heating demand of combustion, so as to control the combustion speed.

[0051] The smoke outlet adjusting valve 5 arranged in the smoke outlet passage 6 can better control the combustion speed and the degree of biomass combustion in cooperation with the air inlet adjusting valve 7, so as to save energy.

[0052] Further, the air inlet at the bottom surface of the second hearth 13 is provided with an ash discharging device 8, the ash discharging device 8 comprises an ash discharging port 81 and an ash receiving box 82, the ash discharging port 81 is communicated with the air inlet at the bottom surface of the second hearth 13, and the ash receiving box 82 is slidingly connected in the open cavity of the furnace body shell 9. The ash after combustion falls freely through the air inlet at the bottom surface of the second hearth 13 to the ash receiving box 82 below.

[0053] Working principle:

[0054] The biomass feeding mode is transverse feeding, the biomass source is extensive, the whole wood can be fed into the combustion chamber 1 at one time, the combustion direction is perpendicular to the feeding direction, the combustion is facilitated, the smoke adjusting valve 5 is arranged in the smoke outlet passage 6, the combustion speed and the biomass combustion degree are controlled in cooperation with the air inlet adjusting valve 7, the four axial flow fans 23 blow air from four directions to the front end of the first hearth 11, the air flow is transmitted to the rear end through the uniformly distributed circular pipe 12 and the guide plate 21, is discharged through the hot air outlet 4, and the ash after combustion is freely dropped into the ash receiving box 82 below through the air inlet of the bottom surface of the second hearth 13.

[0055] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0056] In addition, it should be understood that although the present application is described in the specification in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be combined appropriately to form other embodiments that those skilled in the art can understand.

Claims

1. An outdoor biomass drying stove, characterized by, It comprises a combustion chamber (1), an airflow exchange layer (2), a heat preservation layer (3), a hot air outlet (4), a smoke outlet channel (6) and a furnace body shell (9). The combustion chamber (1) comprises a first furnace (11), a circular tube (12) and a second furnace (13); the second furnace (13) is uniformly provided with a plurality of circular tubes (12) along the cross-sectional circumference; one end of the first furnace (11) is communicated with one end of the second furnace (13); The furnace body shell (9) is provided with the airflow exchange layer (2) therein; the airflow exchange layer (2) is provided with the combustion chamber (1) therein; one side of the furnace body shell (9) is provided with a feeding port; the feeding port of the furnace body shell (9) is communicated with the other end of the first furnace (11); the other end of the second furnace (13) is communicated with one end of the smoke outlet channel (6); the other end of the smoke outlet channel (6) extends out of the furnace body shell (9); both ends of the circular tube (12) are communicated with the airflow exchange layer (2); the top surface of the furnace body shell (9) is provided with the hot air outlet (4); the hot air outlet (4) is communicated with the airflow exchange layer (2); the heat preservation layer (3) is arranged between the inner side wall of the furnace body shell (9) and the outer side wall of the airflow exchange layer (2).

2. The outdoor biomass drying stove according to claim 1, characterized in that, The furnace body shell (9) is provided with a positioning plate (24); the positioning plate (24) is rectangular; the positioning plate (24) is provided with a sleeve (22) at each of the four top corners; the sleeve (22) is provided with an axial flow fan (23) therein; one end of the sleeve (22) is communicated with the airflow exchange layer (2); the feeding port side of the furnace body shell (9) is provided with a feeding port panel (91); the feeding port panel (91) is provided with four openings; the other end of the sleeve (22) is communicated with the openings of the feeding port panel (91).

3. The outdoor biomass drying stove according to claim 2, wherein, The feeding port panel (91) is provided with a filter screen exhaust cover (92) at each of the four openings.

4. The outdoor biomass drying stove according to claim 2, wherein, The airflow exchange layer (2) is cylindrical; the end of the sleeve (22) communicated with the airflow exchange layer (2) is inclined towards the first furnace (11).

5. The outdoor biomass drying stove according to claim 4, characterized in that, The outer side wall of the second furnace (13) is uniformly provided with a plurality of guide plates (21) along the cross-sectional circumference.

6. The outdoor biomass drying stove according to claim 1, wherein, The smoke outlet channel (6) is provided with a smoke outlet adjusting valve (5); the smoke outlet adjusting valve (5) comprises a threaded rotating shaft (51), a positioning bolt (52), a torsion spring (53), an adjusting plate (54) and an adjusting handle (55); One side of the adjusting plate (54) is rotatably connected with the side wall of the smoke outlet channel (6) through the threaded rotating shaft (51); the threaded rotating shaft (51) is provided with the positioning bolt (52) for positioning and tightening; one end of the adjusting handle (55) is connected with the threaded rotating shaft (51); the threaded rotating shaft (51) is fixedly connected with the adjusting plate (54); the torsion spring (53) is sleeved on the adjusting handle (55); one end of the torsion spring (53) is connected with the side wall of the smoke outlet channel (6); the other end of the torsion spring (53) is connected with the adjusting handle (55).

7. The outdoor biomass drying stove according to claim 1, wherein The furnace body shell (9) is provided with an open cavity near the bottom surface; the second hearth (13) is provided with an air inlet at the bottom; the air inlet of the second hearth (13) is communicated with the open cavity of the furnace body shell (9); the air inlet at the bottom surface of the second hearth (13) is provided with an air volume adjusting valve (7); the air volume adjusting valve (7) comprises a slide (71), a slide plate (72), a pull rod (73) and a positioning sleeve (74); the positioning sleeve (74) is arranged on the top surface of the open cavity of the furnace body shell (9); the pull rod (73) is slidingly connected in the positioning sleeve (74); the slide (71) is arranged on the side wall of the open cavity of the furnace body shell (9); the slide plate (72) is slidingly connected with the slide (71); and the pull rod (73) is connected with one side wall of the slide plate (72).

8. The outdoor biomass drying stove according to claim 7, characterized in that The air inlet at the bottom surface of the second hearth (13) is provided with an ash discharging device (8); the ash discharging device (8) comprises an ash discharging port (81) and an ash receiving box (82); the ash discharging port (81) is communicated with the air inlet at the bottom surface of the second hearth (13); and the ash receiving box (82) is slidingly connected in the open cavity of the furnace body shell (9).

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