A grate for a biomass boiler

Abstract

The utility model discloses a furnace is arranged in a kind of biomass boiler, and it relates to furnace arrangement technical field.A kind of furnace is arranged in a biomass boiler, including biomass boiler main body, the inside fixed connection of biomass boiler main body has furnace fixed frame, rotary dust cleaning structure, rotary dust cleaning structure is located on biomass boiler main body, rotary dust cleaning structure includes transmission box, multiple rotary pipes and gas supply pipe, transmission box is fixedly connected on the outer surface of biomass boiler main body, multiple rotary pipes are all rotationally connected in the inside of furnace fixed frame, by the rotary pipe rotatable being set, and it is connected with spray head on it, in the process of rotation, the gas that spray head sprays can be more evenly acted on the fuel layer on furnace, compared with fixed air inlet passage, this kind of dynamic gas supply mode can better penetrate fuel layer, provide sufficient oxygen for fuel, improve combustion condition, reduce "local oxygen deficiency combustion" phenomenon, to improve the combustion efficiency of fuel, improve the overall thermal efficiency of biomass boiler.

Description

Technical Field

[0001] This utility model relates to the field of grate technology, and in particular to a grate for a biomass boiler. Background Technology

[0002] In the field of biomass energy utilization, biomass boilers are widely used in industrial production and residential heating due to their environmental protection and energy-saving advantages. As the core component of biomass boilers, the grate plays an important role in carrying biomass fuel, achieving uniform combustion of fuel, and discharging ash. Its structural design directly affects the boiler's combustion efficiency, operational stability, and service life.

[0003] Currently, most mainstream biomass boiler grates are fixed grid or stepped type, supplying combustion air through fixed air intake channels below the grate to meet the oxygen demand for combustion. However, in actual operation, biomass fuel has a complex composition and uneven particle size, which can easily form local dense areas when it accumulates on the grate. The combustion air from the fixed air intake channels cannot penetrate these areas, leading to oxygen deficiency inside the fuel layer and "localized oxygen-deficient combustion." This not only causes incomplete combustion and a sharp drop in thermal efficiency but also produces large amounts of harmful gases such as carbon monoxide and tar, increasing the difficulty of exhaust gas treatment. At the same time, the high-temperature ash produced by fuel combustion easily accumulates and clumps on the grate surface and between the fuel layers, forming "coking." The fixed air intake structure cannot specifically disturb the coking areas. As the amount of coking increases, the grate ventilation cross-section shrinks, further exacerbating the oxygen deficiency. In severe cases, this can lead to grate blockage, forcing the boiler to shut down for cleaning and significantly affecting operational stability. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a grate for biomass boilers. This addresses the issue that most mainstream biomass boiler grates are fixed grid or stepped types, supplying combustion air through a fixed air intake channel below the grate to meet the oxygen demand for combustion. However, in actual operation, biomass fuel has a complex composition and uneven particle size, easily forming localized dense areas on the grate. The combustion air from the fixed air intake channel cannot penetrate these areas, leading to oxygen deficiency inside the fuel layer and "localized oxygen-deficient combustion." This results in incomplete fuel combustion, a sharp drop in thermal efficiency, and the production of large amounts of harmful gases such as carbon monoxide and tar, increasing the difficulty of exhaust gas treatment. Simultaneously, the high-temperature ash produced by fuel combustion easily accumulates and agglomerates on the grate surface and in the gaps between the fuel layers, forming "coking." The fixed air intake structure cannot specifically disturb the coking areas. As the amount of coking increases, the grate ventilation cross-section shrinks, further exacerbating oxygen deficiency. In severe cases, this can lead to grate blockage, forcing the boiler to shut down for cleaning, significantly affecting operational stability.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a grate for a biomass boiler, comprising: The main body of the biomass boiler has a grate fixing frame fixedly connected inside. The rotating ash removal structure is located on the main body of the biomass boiler. The rotating ash removal structure includes a transmission box, multiple rotating pipes, and an air supply pipe. The transmission box is fixedly connected to the outer surface of the biomass boiler body. The multiple rotating pipes are rotatably connected to the inside of the grate fixing frame. One end of each of the multiple rotating pipes extends rotatably into the inside of the transmission box. The air supply pipe is fixedly connected to the inside of the transmission box. One end of the air supply pipe extends rotatably to the outside of the transmission box. Multiple connecting pipes are fixedly connected to the outer surface of the air supply pipe. The ends of the multiple rotating pipes near the air supply pipe are respectively rotatably connected to the inside of the corresponding connecting pipes.

[0006] Preferably, the rotating dust removal structure further includes multiple toothed rings, toothed plates, and electric push rods. The multiple toothed rings are respectively fixedly sleeved on the outer surface of the corresponding rotating tubes. The toothed plates are slidably connected to the inner bottom wall of the transmission box. The electric push rod is installed on one side of the transmission box. The telescopic end of the electric push rod slides into the interior of the transmission box and is fixedly connected to the toothed plate. The multiple toothed rings are all meshed with the toothed plates.

[0007] Preferably, a maintenance plate is bolted to the side of the transmission box away from the main body of the biomass boiler.

[0008] Preferably, the biomass boiler body is provided with a slag discharge port.

[0009] Preferably, a support plate is fixedly connected inside the grate fixing frame, and multiple rotating tubes are rotatably connected to the inside of the support plate.

[0010] Preferably, multiple nozzles are fixedly connected to the outer surfaces of the multiple rotating tubes, and the multiple nozzles are respectively connected to the interior of the corresponding rotating tube.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. The grate of this biomass boiler can be rotated by a rotating tube connected to a nozzle. During rotation, the gas sprayed from the nozzle can act more evenly on the fuel layer on the grate. Compared with a fixed air intake channel, this dynamic air supply method can better penetrate the fuel layer, provide sufficient oxygen to the fuel, improve the combustion condition, reduce the phenomenon of "local oxygen deficiency combustion", thereby improving the combustion efficiency of the fuel and improving the overall thermal efficiency of the biomass boiler. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic cross-sectional view of the main body of the biomass boiler of this utility model; Figure 3 This is a schematic diagram of the grate fixing frame structure of this utility model; Figure 4 For the present utility model Figure 3 A magnified structural diagram of point A in the middle.

[0013] Attached reference numerals: 1. Main body of biomass boiler; 2. Ash discharge port; 3. Transmission box; 4. Gas supply pipe; 5. Inspection plate; 6. Electric push rod; 7. Grate fixing frame; 8. Rotating pipe; 9. Nozzle; 10. Support plate; 11. Toothed plate; 12. Toothed ring; 13. Connecting pipe joint. Detailed Implementation

[0014] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0015] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0017] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0018] Biomass boiler body 1: As the core load-bearing frame of the boiler, it has an internal grate fixing frame 7 and an external transmission box 3. It is also equipped with a slag discharge port 2 to provide an installation foundation for each component and realize the discharge of ash and slag. Ash discharge port 2: Located on the main body 1 of the biomass boiler, it is used to discharge the ash and slag from the grate after being swept by the rotating ash cleaning structure; Transmission box 3: Fixed on the outer surface of the biomass boiler body 1, with gas supply pipe 4 and toothed plate 11 installed inside, electric push rod 6 installed on one side, and maintenance plate 5 bolted on the other side, providing installation and protection space for the transmission components of the rotating ash cleaning structure; Air supply pipe 4: Fixed inside the transmission box 3, one end extends to the outside to connect to the air source, and the outer surface is connected to multiple connecting pipes 13, which can deliver the external air source to each rotating pipe 8; Inspection plate 5: It is installed on the side of the transmission box 3 away from the biomass boiler body 1 by bolts. After disassembly, it is convenient to inspect and maintain the internal components of the transmission box 3. Electric push rod 6: Installed on one side of transmission box 3, with the telescopic end extending into the box and fixed to the toothed plate 11. After starting, it can drive the toothed plate 11 to slide on the bottom wall inside the transmission box 3. The grate fixing frame 7 is fixed inside the main body 1 of the biomass boiler. It has an internal fixed support plate 10 and is also rotatably connected to multiple rotating pipes 8, providing an installation base frame for the support plate 10 and the rotating pipes 8. Rotating tube 8: One end rotates and extends into the transmission box 3, and is rotatably connected to the connecting tube head 13. The outer surface is fixed with the toothed ring 12 and the nozzle 9. It can rotate under the drive of the toothed ring 12, and at the same time deliver the air source to the nozzle 9. Nozzle 9: Fixed on the outer surface of the rotating tube 8 and connected to the inside of the tube, normally facing downwards and aligned with the main body 1 of the biomass boiler, it can spray out the gas source inside the rotating tube 8 to blow away the ash and slag in the grate. Support plate 10: It is fixed inside the grate fixing frame 7 and is rotatably connected to multiple rotating tubes 8 to help enhance the stability of the rotating tubes 8 when they rotate; Tooth plate 11: It is slidably connected to the bottom wall of the transmission box 3, one end is fixed to the telescopic end of the electric push rod 6, and meshes with multiple toothed rings 12. It can slide under the drive of the electric push rod 6 and drive the toothed rings 12 to rotate. Gear ring 12: It is fixedly sleeved on the outer surface of the rotating tube 8 and meshes with the gear plate 11. It can rotate under the drive of the gear plate 11, thereby driving the rotating tube 8 to rotate. Connector 13: Fixed on the outer surface of the air supply pipe 4, and rotatably connected to the end of the rotating pipe 8 near the air supply pipe 4, so as to realize the air supply connection between the air supply pipe 4 and the rotating pipe 8 without affecting the rotation of the rotating pipe 8.

[0019] Example 1: like Figure 1-4As shown, when the electric push rod 6 is started, its telescopic end drives the toothed plate 11 to slide on the bottom wall of the transmission box 3. Since the toothed plate 11 meshes with multiple toothed rings 12, it drives multiple rotating tubes 8 to rotate. Multiple nozzles 9 are fixedly connected to the outer surface of the multiple rotating tubes 8, and the multiple nozzles 9 are respectively connected to the interior of the corresponding rotating tubes 8. While the rotating tubes 8 are rotating, the external air source enters the rotating tubes 8 through the air supply pipe 4 and then sprays out from the nozzles 9 to blow and clean the ash and slag on the grate. The cleaned ash and slag can be discharged through the slag discharge port 2 set on the biomass boiler body 1.

[0020] Example 2: like Figure 3 As shown, the support plate 10 is fixedly connected inside the grate fixing frame 7, providing an additional support point for the rotating tube 8. This shares the weight and stress borne by the grate fixing frame 7 alone, making the structure of the entire grate system more stable, reducing the risk of structural deformation caused by long-term operation or external forces, and ensuring the safe and stable operation of the biomass boiler.

[0021] Furthermore, when using this device, the grate fixing frame 7 is fixedly connected inside the biomass boiler body 1, providing a basic frame for the installation of other components. A support plate 10 is fixedly connected inside the grate fixing frame 7, and multiple rotating tubes 8 are rotatably connected inside the grate fixing frame 7 and rotatably connected to the support plate 10, ensuring the stable rotation of the rotating tubes 8.

[0022] The air supply pipe 4 in the rotating dust removal structure is fixedly connected inside the transmission box 3, and one end of it extends rotatably to the outside of the transmission box 3 for connecting to an external air source. Multiple connecting pipes 13 are fixedly connected to the outer surface of the air supply pipe 4. The ends of multiple rotating pipes 8 near the air supply pipe 4 are respectively rotatably connected to the corresponding connecting pipes 13. In this way, the external air source can supply air to each rotating pipe 8 through the air supply pipe 4 and the connecting pipes 13.

[0023] Multiple toothed rings 12 are fixedly sleeved on the outer surface of the corresponding rotating tubes 8. The toothed plate 11 is slidably connected to the inner bottom wall of the transmission box 3. The electric push rod 6 is installed on one side of the transmission box 3. Its telescopic end slides into the interior of the transmission box 3 and is fixedly connected to the toothed plate 11. Multiple toothed rings 12 are engaged with the toothed plate 11. When the electric push rod 6 is started, its telescopic end drives the toothed plate 11 to slide on the inner bottom wall of the transmission box 3. Since the toothed plate 11 is engaged with multiple toothed rings 12, it drives multiple rotating tubes 8 to rotate.

[0024] Multiple nozzles 9 are fixedly connected to the outer surface of multiple rotating tubes 8, and the nozzles 9 are respectively connected to the interior of the corresponding rotating tubes 8. While the rotating tubes 8 are rotating, the external air source enters the rotating tubes 8 through the air supply pipe 4 and then sprays out from the nozzles 9 to blow and clean the ash on the grate. The cleaned ash can be discharged through the ash discharge port 2 set on the biomass boiler body 1. The transmission box 3 is bolted with a maintenance plate 5 on the side away from the biomass boiler body 1 to facilitate the inspection and maintenance of the internal components of the transmission box 3. The nozzles 9 face downwards when not in normal operation.

[0025] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A grate for a biomass boiler, characterized in that, include: The main body of the biomass boiler (1) is internally fixedly connected to a grate fixing frame (7); The rotating ash removal structure is located on the main body (1) of the biomass boiler; The rotating ash removal structure includes a transmission box (3), multiple rotating pipes (8) and an air supply pipe (4). The transmission box (3) is fixedly connected to the outer surface of the biomass boiler body (1). The multiple rotating pipes (8) are all rotatably connected to the inside of the grate fixing frame (7). One end of the multiple rotating pipes (8) is rotatably extended into the inside of the transmission box (3). Among them, the air supply pipe (4) is fixedly connected inside the transmission box (3), one end of the air supply pipe (4) extends rotatably to the outside of the transmission box (3), and multiple connecting pipes (13) are fixedly connected to the outer surface of the air supply pipe (4). Multiple rotating pipes (8) are rotatably connected to the inside of the corresponding connecting pipes (13) at one end near the air supply pipe (4).

2. The grate for a biomass boiler according to claim 1, characterized in that: The rotating dust removal structure also includes multiple toothed rings (12), toothed plates (11) and electric push rods (6). The multiple toothed rings (12) are respectively fixedly sleeved on the outer surface of the corresponding rotating tubes (8), and the toothed plates (11) are slidably connected to the inner bottom wall of the transmission box (3). Among them, the electric push rod (6) is installed on one side of the transmission box (3). The telescopic end of the electric push rod (6) slides into the interior of the transmission box (3) and is fixedly connected to the toothed plate (11). Multiple toothed rings (12) are meshed with the toothed plate (11).

3. The grate for a biomass boiler according to claim 1, characterized in that: The transmission box (3) has a maintenance plate (5) bolted on the side away from the biomass boiler body (1).

4. The grate for a biomass boiler according to claim 1, characterized in that: The biomass boiler body (1) is provided with a slag discharge port (2).

5. The grate for a biomass boiler according to claim 1, characterized in that: The grate fixing frame (7) is internally fixedly connected to a support plate (10), and multiple rotating tubes (8) are rotatably connected to the inside of the support plate (10).

6. The grate for a biomass boiler according to claim 1, characterized in that: Multiple nozzles (9) are fixedly connected to the outer surfaces of the multiple rotating tubes (8), and the multiple nozzles (9) are respectively connected to the interior of the corresponding rotating tubes (8).

Images