Totally-closed biomass boiler

Abstract

The utility model discloses a totally closed biomass boiler relates to boiler technical field, including boiler body, feed pipe, connecting shaft, base and second blast pipe, boiler body top is connected with the top cover through bolt, the top of top cover is welded with the smoke vent, the bottom of smoke vent is communicated with device main part inside, and the second blast pipe is connected with the top cover. The bottom of the device body is connected with the top of the combustion chamber, when the boiler is used, feeding is carried out through the inclined feeding pipe, in order to prevent tempering of the combustion chamber when fuel is added, a baffle is arranged at an outlet of a channel of the feeding pipe and is in a hanging state, and when the combustion chamber is tempered, under the action of the positive pressure of smoke of the combustion chamber, the baffle is in a closed state. And the baffle is pushed to be attached to the outlet end of the feeding pipe, so that the outlet end of the feeding port is closed, the tempering phenomenon of the feeding pipe during feeding is avoided, and the use safety of the boiler is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a fully enclosed biomass boiler. Background Art

[0002] A biomass boiler is a boiler that uses biomass energy as fuel. It has the advantages of being highly environmentally friendly and emitting less harmful gases. After searching, a Chinese patent authorization number CN206904963U discloses a biomass boiler. The biomass boiler uses a tertiary air supply device and has a large furnace space, which is conducive to the full combustion of a large amount of volatiles that are instantly released when the biomass fuel is burned, so that the fuel is fully burned. Since the boiler furnace will flash back during the combustion operation, when adding fuel to the furnace, the flame will flash back from the furnace door to cause accidental combustion. If no prevention measures are taken, a fire alarm will occur, resulting in a fire accident. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a fully enclosed biomass boiler, which solves the problem raised in the background technology that flashback may occur in the boiler furnace during the combustion operation, and when fuel is added to the furnace, the flame may bounce back from the furnace door and cause accidental combustion. If no prevention measures are taken, a fire alarm may occur, resulting in a fire accident.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a fully enclosed biomass boiler, including a boiler body, a feed pipe, a connecting shaft, a base and a second air inlet pipe, the top of the boiler body is connected to a top cover by bolts, a smoke exhaust port is welded on the top of the top cover, the bottom of the smoke exhaust port is connected to the inside of the device body, the bottom of the device body is connected to the top of the combustion chamber, one side of the combustion chamber is connected to one end of the feed pipe, one end of the feed pipe extends to the inside of the combustion chamber, one end of the feed pipe is rotatably connected to the baffle through the connecting shaft, the bottom of the combustion chamber is connected to the top of the base by screws, an ignition device is installed inside the base, and supporting feet are installed on the outside of the base by bolts, and a base plate is installed on the bottom of the base by bolts.

[0005] Preferably, the feed pipe is arranged in an inclined shape, the cross-section of one end of the bottom of the feed pipe is vertical, and the bottom end of the feed pipe is in contact with the surface of one side of the baffle, so that the baffle can be in contact with one end of the feed pipe when it is in a suspended state.

[0006] Preferably, two boiler bodies are provided, flange rings are welded on the top and bottom edges of the two boiler bodies, and adjacent flange rings are connected to each other by bolts. The split connection of the boiler bodies is conducive to easy transportation.

[0007] Preferably, the top of one end of the feed pipe is connected to the first air inlet pipe, the bottom end of the second air inlet pipe is connected to the inside of the base, and the other ends of the first air inlet pipe and the second air inlet pipe are both connected to an external blower. Blowing external air into the boiler through the first air inlet pipe and the second air inlet pipe is conducive to allowing the internal fuel to fully contact with the air for full combustion.

[0008] Preferably, a wind plate is welded inside the base, the wind plate has a conical structure, and holes are evenly distributed on the surface of the wind plate. The cavity between the wind plate and the inner wall of the base is connected to the second air inlet pipe, and air can enter the combustion chamber evenly through the holes on the surface of the wind plate, which helps prevent fuel accumulation inside the base from causing insufficient contact between the bottom fuel and air and resulting in incomplete combustion.

[0009] The utility model provides a fully enclosed biomass boiler. It has the following beneficial effects:

[0010] (1) This is a fully enclosed biomass boiler. When the boiler is in use, it is fed through an inclined feed pipe. In order to prevent the combustion chamber from backfired when adding fuel, a baffle is set at the outlet of the feed pipe channel. The baffle is in a hanging state. When the combustion chamber backfires, the positive pressure of the flue gas in the combustion chamber pushes the baffle to fit with the outlet end of the feed pipe, so that the outlet end of the feed port is closed, which is beneficial to avoid the backfire phenomenon of the feed pipe when adding fuel, thereby helping to improve the safety of the use of the boiler.

[0011] (2) This fully enclosed biomass boiler connects the first air inlet pipe and the second air inlet pipe with an external blower, and blows air into the feed pipe to facilitate the feeding of biomass materials inside the feed pipe. At the same time, positive pressure can be generated in the combustion chamber while blowing air, which can prevent backfire, and the blowing of external air can facilitate the full combustion of materials inside the combustion chamber.

[0012] (3) This fully enclosed biomass boiler uses a blower to blow external air into the cavity between the air plate and the inner wall of the base through the second air inlet pipe, so that the air can evenly enter the combustion chamber through the holes on the surface of the air plate, which helps to prevent the accumulation of fuel inside the base, resulting in insufficient contact between the bottom fuel and the air, resulting in incomplete combustion.

[0013] This solves the problem that due to the backfire phenomenon during the combustion operation of the boiler furnace, when fuel is added inside the furnace, the flames will jump out of the furnace door and cause unexpected combustion. If no prevention measures are taken, a fire alarm will occur, resulting in a fire accident. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the base of the utility model;

[0016] Figure 3 This is a schematic diagram of the baffle structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the wind plate structure of the utility model;

[0018] Figure 5 It is a schematic diagram of the structure of the utility model from top view.

[0019] In the figure, 1. boiler body; 2. top cover; 3. smoke exhaust port; 4. flange ring; 5. feed pipe; 6. first air inlet pipe; 7. connecting shaft; 8. baffle; 9. base; 10. ignition device; 11. supporting foot; 12. bottom plate; 13. second air inlet pipe; 14. wind plate; 15. combustion chamber. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1:

[0022] See also Figure 1-5A fully enclosed biomass boiler comprises a boiler body 1, a feed pipe 5, a connecting shaft 7, a base 9 and a second air inlet pipe 13. The top of the boiler body 1 is connected with a top cover 2 by bolts, a smoke exhaust port 3 is welded on the top of the top cover 2, the bottom of the smoke exhaust port 3 is connected with the inside of the device body, the bottom of the device body is connected with the top of the combustion chamber 15, one side of the combustion chamber 15 is connected with one end of the feed pipe 5, one end of the feed pipe 5 extends into the combustion chamber 15, one end of the feed pipe 5 is rotatably connected with the baffle 8 through the connecting shaft 7, the bottom of the combustion chamber 15 is connected with the top of the base 9 by screws, an ignition device 10 is installed inside the base 9, and a supporting foot 11 is installed on the outside of the base 9 by bolts, and the bottom of the base 9 is installed by bolts There is a bottom plate 12, the feed pipe 5 is arranged in an inclined shape, the cross-section of one end of the bottom of the feed pipe 5 is vertical, and the bottom end of the feed pipe 5 is in contact with the surface of one side of the baffle 8, which is conducive to the baffle. When the boiler is in use, feeding is carried out through the inclined feed pipe 5. In order to prevent the combustion chamber 15 from backfired when adding fuel, a baffle 8 is arranged at the channel outlet of the feed pipe 5, and the baffle 8 is in a hanging state. When the combustion chamber 15 backfires, under the action of the positive pressure of the flue gas in the combustion chamber 15, the baffle 8 is pushed to fit with the outlet end of the feed pipe 5, so that the outlet end of the feed port is closed, which is conducive to avoiding the backfire phenomenon of the feed pipe 5 when adding fuel, thereby helping to improve the safety of the use of the boiler.

[0023] Embodiment 2:

[0024] The top of one end of the feed pipe 5 is connected to the first air inlet pipe 6, and the bottom end of the second air inlet pipe 13 is connected to the inside of the base 9. The other ends of the first air inlet pipe 6 and the second air inlet pipe 13 are connected to an external blower. By connecting the first air inlet pipe 6 and the second air inlet pipe 13 to the external blower, and blowing the air flow into the feed pipe 5, it is beneficial to push the biomass material inside the feed pipe 5 for feeding. At the same time, positive pressure can be generated on the combustion chamber 15 while blowing air, which can prevent backfire, and the blowing of external air is beneficial to promote the full combustion of the material inside the combustion chamber 15.

[0025] Embodiment 3:

[0026] A wind plate 14 is welded inside the base 9. The wind plate 14 has a conical structure and holes are evenly distributed on the surface of the wind plate 14. The cavity between the wind plate 14 and the inner wall of the base 9 is connected to the second air inlet pipe 13. The external air is blown into the cavity between the wind plate 14 and the inner wall of the base 9 through the second air inlet pipe 13 by a blower, and then the air can evenly enter the combustion chamber 15 through the holes on the surface of the wind plate 14, which helps to prevent the accumulation of fuel inside the base 9, resulting in insufficient contact between the bottom fuel and the air, resulting in incomplete combustion.

[0027] Working principle: When the boiler is in use, the feed is fed through the inclined feed pipe 5. In order to prevent the combustion chamber 15 from backfired when adding fuel, a baffle 8 is set at the outlet of the feed pipe 5. The baffle 8 is in a hanging state. When the combustion chamber 15 backfires, the baffle 8 is pushed to fit with the outlet end of the feed pipe 5 under the action of the positive pressure of the flue gas in the combustion chamber 15, so that the outlet end of the feed port is closed, which is conducive to avoiding the backfire phenomenon of the feed pipe 5 when adding fuel, thereby improving the safety of the use of the boiler. By connecting the first air inlet pipe 6 and the second air inlet pipe 13 to the external blower, When the air flow is blown into the feed pipe 5, it is helpful to push the biomass material inside the feed pipe 5 to feed. At the same time, it can generate positive pressure on the combustion chamber 15 while blowing, which can prevent backfire. In addition, by blowing external air, it is helpful to promote the full combustion of the material inside the combustion chamber 15. The external air is blown into the cavity between the air plate 14 and the inner wall of the base 9 through the second air inlet pipe 13 by the blower, and then the air can evenly enter the combustion chamber 15 through the holes and grooves on the surface of the air plate 14, which is helpful to prevent the accumulation of fuel inside the base 9, resulting in insufficient contact between the bottom fuel and the air, resulting in incomplete combustion.

[0028] The components of the utility model, 1. boiler body; 2. top cover; 3. smoke exhaust port; 4. flange ring; 5. feed pipe; 6. first air inlet pipe; 7. connecting shaft; 8. baffle; 9. base; 10. ignition device; 11. supporting foot; 12. bottom plate; 13. second air inlet pipe; 14. air plate; 15. combustion chamber, are all common standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0029] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0030] 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 fully enclosed biomass boiler, characterized in that: The invention comprises a boiler body (1), a feed pipe (5), a connecting shaft (7), a base (9) and a second air inlet pipe (13), wherein the top of the boiler body (1) is connected to a top cover (2) by bolts, a smoke exhaust port (3) is welded to the top of the top cover (2), the bottom of the smoke exhaust port (3) is communicated with the inside of the device body, the bottom of the device body is connected to the top of a combustion chamber (15), one side of the combustion chamber (15) is connected to one end of the feed pipe (5), one end of the feed pipe (5) extends into the inside of the combustion chamber (15), one end of the feed pipe (5) is rotatably connected to a baffle (8) by a connecting shaft (7), the bottom of the combustion chamber (15) is connected to the top of the base (9) by screws, an ignition device (10) is installed inside the base (9), a supporting foot (11) is installed on the outside of the base (9) by bolts, and a bottom plate (12) is installed on the bottom of the base (9) by bolts.

2. A fully enclosed biomass boiler according to claim 1, characterized in that: The feed pipe (5) is arranged in an inclined shape, the cross section of one end of the bottom of the feed pipe (5) is vertical, and the bottom of the feed pipe (5) is in contact with the surface of one side of the baffle (8).

3. A fully enclosed biomass boiler according to claim 1, characterized in that: Two boiler bodies (1) are provided, and flange rings (4) are welded on the top and bottom edges of the two boiler bodies (1), and adjacent flange rings (4) are connected to each other by bolts.

4. A fully enclosed biomass boiler according to claim 1, characterized in that: The top of one end of the feed pipe (5) is connected to the first air inlet pipe (6), the bottom end of the second air inlet pipe (13) is connected to the inside of the base (9), and the other ends of the first air inlet pipe (6) and the second air inlet pipe (13) are both connected to an external blower.

5. The fully enclosed biomass boiler according to claim 1, characterized in that: An air plate (14) is welded inside the base (9), the air plate (14) is in a conical structure, and holes and grooves are evenly distributed on the surface of the air plate (14), and the cavity between the air plate (14) and the inner wall of the base (9) is connected to the second air inlet pipe (13).

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