Air inlet device of biomass gasifier

Abstract

The utility model belongs to the technical field of biomass gasification furnaces, and particularly relates to a biomass gasification furnace air inlet device which comprises a furnace body, a support is arranged at the bottom of the furnace body, a feeding port is formed in the top of the furnace body, an exhaust port is formed in the upper portion of the surface of one side of the furnace body, and an annular pipeline is arranged below the surface of the outer side of the furnace body. A gas inlet pipe is arranged on one side of the outer portion of the annular pipeline, four extending pipes are evenly arranged on the inner wall of the furnace body, the extending pipes are arranged below the fire grate, the four extending pipes all communicate with the interior of the annular pipeline, limiting bolts are arranged on the sides, close to the circle center of the furnace body, of the upper surfaces of the extending pipes, and the annular pipeline is arranged below the surface of the furnace body. Air firstly flows into the annular pipeline to be preheated and then is introduced into the furnace, cold air is prevented from directly entering the furnace to influence the stability in the furnace, meanwhile, four air outlet holes capable of being independently adjusted are formed in the lower portion in the furnace, and the air outlet amount in the single-side direction can be controlled externally so as to control the air outlet amount and the oxygen content of all areas in the furnace.

Description

Technical Field

[0001] The utility model belongs to the technical field of biomass gasifiers, and in particular relates to an air inlet device for a biomass gasifier. Background Art

[0002] The combustible gas produced by the biomass gasifier is a green new energy source. Since the raw materials for plant gas are crop straw, forest waste, edible fungus residue, cattle and sheep manure and all combustible materials, it is an inexhaustible renewable resource.

[0003] When in use, the biomass gasifier will introduce gas from the bottom to provide oxygen for the combustion of the internal materials, and the generated plant fuel gas will be discharged from the top. However, since the biomass enters the furnace in the form of pellets, the air flow is not smooth due to the uneven gaps between the particles, which will cause different oxygen content in different areas of the furnace, affecting the combustion effect. At the same time, directly introducing cold air into the interior will affect the temperature in the furnace and increase uncontrollability. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide an air inlet device for a biomass gasifier, which can control the air volume in each direction at the bottom for easy operation and preheat the incoming gas at the same time.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The air inlet device of the biomass gasification furnace comprises a furnace body, a bracket is arranged at the bottom of the furnace body, a feed port is opened at the top of the furnace body, an exhaust port is opened above the surface of one side of the furnace body, an annular pipe is arranged below the outer surface of the furnace body, an air inlet pipe is arranged on the outer side of the annular pipe, four extension pipes are evenly arranged on the inner wall of the furnace body, the extension pipes are placed below the grate, the four extension pipes are all connected with the inside of the annular pipe, a limiting bolt is arranged on the side of the upper surface of the extension pipe close to the center of the furnace body, an air outlet is opened on the side of the upper surface of the extension pipe close to the limiting bolt, a sliding sleeve is slidably installed on the surface of the extension pipe, a notch groove is opened on one side of the upper surface of the sliding sleeve, and the notch groove corresponds to the position of the air outlet.

[0007] Furthermore, ear plates A are symmetrically arranged on both sides of the sliding sleeve, a sliding rod is arranged on the surface of the ear plate A on the side away from the center of the furnace body, and ear plates B are symmetrically arranged on both sides of the extension tube, and the sliding rod passes through the ear plate B.

[0008] Furthermore, a spring A is sleeved on the surface of the slide rod, and the spring A is placed between the ear plate A and the ear plate B.

[0009] Furthermore, a pull rope is connected to the upper side of the sliding sleeve away from the notch groove, and the pull rope passes through the furnace body. A pull head is provided at one end of the pull rope away from the sliding sleeve, and the pull head is placed outside the furnace body.

[0010] Furthermore, four groups of extension plates are evenly arranged on the outer surface of the furnace body, and each group of the extension plates is provided with two. A rotating shaft is rotatably installed between the two extension plates in the same group, and a pressure plate is obliquely arranged on the lower surface of the rotating shaft. The pressure plate is inclined outward, and the bottom of the pressure plate is in contact with the pull rope.

[0011] Furthermore, a control panel is arranged on the top of the rotating shaft, fixing bolts are evenly arranged on the outside of the furnace body, the fixing bolts are placed directly above the pull rope, a spring B is sleeved on the surface of the fixing bolt, and the end of the spring B facing away from the furnace body contacts the inner surface of the control panel.

[0012] Compared with the prior art, the utility model has the following beneficial effects: an annular duct is arranged below the surface of the furnace body, and air first flows into the annular duct for preheating and then passes into the furnace, thereby preventing direct entry of cold air and affecting the stability of the furnace; at the same time, four individually adjustable air outlets are arranged below the furnace, and the air outlet size in a single direction can be controlled from the outside to control the air outlet volume and oxygen content in each area of ​​the furnace, thereby ensuring the consistency of combustion in the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the external three-dimensional structure of the furnace body of the utility model;

[0014] Figure 2 It is a schematic diagram of the horizontal top cross-sectional structure of the furnace body of the utility model;

[0015] Figure 3 For the utility model Figure 1 A schematic diagram of the enlarged structure of area A;

[0016] Figure 4 For the utility model Figure 2 Schematic diagram of the enlarged structure of area B.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0018] 1. Bracket; 2. Furnace body; 3. Exhaust port; 4. Feed port; 5. Annular pipe; 6. Inlet pipe; 7. Extension pipe; 8. Limit bolt; 9. Air outlet; 10. Sliding sleeve; 11. Notch groove; 12. Ear plate A; 121. Sliding rod; 13. Ear plate B; 14. Spring A; 15. Pull rope; 16. Pull head; 17. Extension plate; 18. Rotating shaft; 19. Pressing plate; 20. Control panel; 21. Fixing bolt; 22. Spring B. DETAILED DESCRIPTION

[0019] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0020] Please refer to Figure 1-Figure 4 As shown, the air inlet device of the biomass gasification furnace includes a furnace body 2, a bracket 1 is arranged at the bottom of the furnace body 2, so that the furnace body 2 is in a suspended state, so as to facilitate slag discharge through the bottom, a feed port 4 is opened at the top of the furnace body 2, and the feed port 4 is connected to the feeder, an exhaust port 3 is opened above the surface of one side of the furnace body 2, an annular pipe 5 is arranged below the outer surface of the furnace body 2, the cross section of the annular pipe 5 is U-shaped, and a sealed annular space is formed with the outer surface of the furnace body 2, an air inlet pipe 6 is arranged on one side of the annular pipe 5, and the air inlet pipe 6 is connected to the blower to convey air to the inside, and four extension pipes 7 are evenly arranged on the inner wall of the furnace body 2, and the extension pipe 7 is placed below the grate and does not directly contact with the fuel. The four extension tubes 7 are all connected with the inside of the annular pipe 5, and air can be introduced into the four extension tubes 7 at the same time. A limit bolt 8 is arranged on the side of the upper surface of the extension tube 7 close to the center of the furnace body 2 to prevent the sliding sleeve 10 from falling. An air outlet 9 is opened on the side of the upper surface of the extension tube 7 close to the limit bolt 8. The air outlet 9 is placed under the grate to form an upward blowing, so that the gas in the furnace flows upward. A sliding sleeve 10 is slidably installed on the surface of the extension tube 7. A notch groove 11 is opened on one side of the upper surface of the sliding sleeve 10. The notch groove 11 corresponds to the position of the air outlet 9. The position of the sliding sleeve 10 is controlled to control the overlapping area of ​​the notch groove 11 and the air outlet 9, thereby controlling the air output.

[0021] Please refer to Figure 2 and Figure 4 As shown, ear plates A12 are symmetrically arranged on both sides of the sliding sleeve 10, a sliding rod 121 is arranged on the surface of the ear plate A12 which is away from the center of the furnace body 2, ear plates B13 are symmetrically arranged on both sides of the extension tube 7, the sliding rod 121 penetrates the ear plate B13, a spring A14 is sleeved on the surface of the sliding rod 121, the spring A14 is placed between the ear plate A12 and the ear plate B13, and the ear plate A12 and the ear plate B13 are installed by welding, when the sliding sleeve 10 slides, the sliding rod 121 can be driven to interact, and at the same time, the elastic force of the spring A14 can be used to provide the sliding sleeve 10 with a force toward the center of the furnace body 2, so as to achieve rapid sealing of the air outlet 9 when no force is applied.

[0022] Among them, a pull rope 15 is connected to the upper side of the sliding sleeve 10 away from the notch groove 11, and the pull rope 15 passes through the furnace body 2. A pull head 16 is provided at the end of the pull rope 15 away from the sliding sleeve 10, and the pull head 16 is placed on the outside of the furnace body 2. The pull rope 15 is pulled externally to control the position of the sliding sleeve 10. The pull rope 15 applies an outward force, and the spring A14 applies an inward force to balance the sliding sleeve 10. The pull rope 15 is made of high-temperature resistant material to prevent the pull rope 15 from breaking due to the high temperature of the slag during slag discharge.

[0023] Please refer to Figure 1 and Figure 3 As shown, four groups of extension plates 17 are evenly arranged on the outer surface of the furnace body 2, and each group of extension plates 17 is set to two. A rotating shaft 18 is rotatably installed between the two extension plates 17 in the same group. A pressure plate 19 is inclined on the lower surface of the rotating shaft 18. The lower side of the pressure plate 19 is inclined outward, and the bottom of the pressure plate 19 is in contact with the pull rope 15, so the pull rope 15 will not be blocked when it moves outward, and vice versa, the pull rope 15 cannot move inward.

[0024] Among them, a control panel 20 is arranged on the top of the rotating shaft 18, and fixing bolts 21 are evenly arranged on the outside of the furnace body 2. The fixing bolts 21 are placed just above the pull rope 15. A spring B22 is sleeved on the surface of the fixing bolt 21. The end of the spring B22 facing away from the furnace body 2 is in contact with the inner surface of the control panel 20. The spring B22 can ensure the squeezing force of the pressure plate 19 on the pull rope 15 to prevent slipping. At the same time, the air outlet 9 can be quickly sealed by pressing the control panel 20.

[0025] The working principle of the utility model is as follows: the feed port 4 at the top is connected to the barrel to inject biomass pellets into the furnace body 2 through the top, and then the internal materials are heated and burned through the furnace body 2, and the generated gas is discharged through the exhaust port 3. In this process, air needs to be filled into the furnace body 2 to provide oxygen for the internal combustion. The air inlet pipe 6 is connected to the blower to fill the annular pipe 5 with gas. The gas inside the annular pipe 5 flows into the four extension pipes 7 respectively, and is finally discharged upward through the air outlet 9. Due to the existence of the spring A14, the ear plate A12 always has a force in the direction of the center of the furnace body 2, and then the position of the sliding sleeve 10 is closer to the center of the furnace body 2 without being subject to external force, so as to adjust the air outlet. 9 is sealed, and then the position of the sliding sleeve 10 can be controlled to control the opening size of the air outlet 9 in a single direction to control the air outlet volume. The sliding sleeve 10 is controlled by pulling the pull head 16 externally. During the external pulling process, the overlapping area of ​​the notch groove 11 and the air outlet 9 is expanded, and the air outlet volume is increased, otherwise it is reduced. Due to the existence of the spring B22, the control plate 20 always has an outward force, and then the bottom of the pressure plate 19 is tilted outward, so the pull rope 15 can only move outward but not inward. When discharging slag, the control plate 20 is pressed so that the pressure plate 19 does not contact the pull rope 15. At this time, the elastic force of the spring A14 is used to make the sliding sleeve 10 return quickly to seal the air outlet 9 to prevent the slag from falling into the air outlet 9.

[0026] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A biomass gasification furnace air inlet device, comprising a furnace body (2), a bracket (1) is arranged at the bottom of the furnace body (2), a feed inlet (4) is opened at the top of the furnace body (2), and an exhaust port (3) is opened above the surface of one side of the furnace body (2), characterized in that: An annular pipe (5) is arranged below the outer surface of the furnace body (2), an air inlet pipe (6) is arranged on one side of the outer side of the annular pipe (5), four extension pipes (7) are evenly arranged on the inner wall of the furnace body (2), the extension pipes (7) are placed below the grate, the four extension pipes (7) are all connected to the inside of the annular pipe (5), a limiting bolt (8) is arranged on the side of the upper surface of the extension pipe (7) close to the center of the furnace body (2), an air outlet hole (9) is opened on the side of the upper surface of the extension pipe (7) close to the limiting bolt (8), a sliding sleeve (10) is slidably installed on the surface of the extension pipe (7), a notch groove (11) is opened on one side of the upper surface of the sliding sleeve (10), and the notch groove (11) corresponds to the position of the air outlet hole (9).

2. The air inlet device for a biomass gasifier according to claim 1, characterized in that: Ear plates A (12) are symmetrically arranged on both sides of the sliding sleeve (10), and a sliding rod (121) is arranged on the surface of the ear plate A (12) on the side away from the center of the furnace body (2). Ear plates B (13) are symmetrically arranged on both sides of the extension tube (7), and the sliding rod (121) passes through the ear plate B (13).

3. The air inlet device for a biomass gasifier according to claim 2, characterized in that: The surface of the sliding rod (121) is sleeved with a spring A (14), and the spring A (14) is placed between the ear plate A (12) and the ear plate B (13).

4. The air inlet device for a biomass gasifier according to claim 3 is characterized in that: A pull rope (15) is connected to the upper side of the sliding sleeve (10) away from the notch groove (11), and the pull rope (15) passes through the furnace body (2). A pull head (16) is provided at one end of the pull rope (15) away from the sliding sleeve (10), and the pull head (16) is placed outside the furnace body (2).

5. The air inlet device for a biomass gasifier according to claim 4, characterized in that: Four groups of extension plates (17) are evenly arranged on the outer surface of the furnace body (2), and each group of the extension plates (17) is provided with two, and a rotating shaft (18) is rotatably installed between the two extension plates (17) in the same group, and a pressure plate (19) is inclined on the lower surface of the rotating shaft (18), and the pressure plate (19) is inclined outward, and the bottom of the pressure plate (19) is in contact with the pull rope (15).

6. The air inlet device for a biomass gasifier according to claim 5, characterized in that: A control panel (20) is arranged on the top of the rotating shaft (18), and fixing bolts (21) are evenly arranged on the outside of the furnace body (2). The fixing bolts (21) are placed directly above the pull rope (15), and a spring B (22) is sleeved on the surface of the fixing bolt (21). The end of the spring B (22) facing away from the furnace body (2) contacts the inner surface of the control panel (20).

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