A three-pass biomass boiler

Abstract

The application provides a three-drum biomass boiler, which comprises an upper drum, a main lower drum and an auxiliary lower drum, a dust falling pipe is arranged between the main lower drum and the auxiliary lower drum, a temporary storage layer and a discharging layer are arranged in the dust falling pipe, a partition plate is arranged between the temporary storage layer and the discharging layer, the partition plate is provided with an opening and closing door, a discharging door is arranged at the bottom of the discharging layer, a dust discharging pipe is arranged outside the discharging door, a vibrating element is arranged at the connecting position of the dust discharging pipe and the outer wall of the discharging layer, and a cleaning assembly is arranged on the side wall of the discharging layer; through layering of the dust falling pipe into the temporary storage layer and the discharging layer, on the one hand, the dust collecting and discharging work can be carried out simultaneously, and the dust collecting efficiency is improved; on the other hand, through arrangement of the dust discharging pipe at the bottom of the discharging layer, the dust is prevented from being exposed in the process of discharging, the situation that the dust is scattered in the air is reduced, and the cleanliness and safety of the working environment are ensured.

Description

Technical Field

[0001] This utility model relates to the field of biomass boiler equipment technology, and in particular to a three-drum biomass boiler. Background Technology

[0002] Biomass is characterized by its renewable organic matter derived from living organisms, such as agricultural and forestry waste (straw, rice husks, sawdust, branches, fruit shells), energy crops (swallowtail millet, miscanthus, sweet sorghum), organic waste (kitchen waste, livestock and poultry manure, sludge), and processing residues (oil pressing residue, sugarcane bagasse, wood processing scraps). These raw materials can often be used as energy sources in boilers. Compared to traditional coal, these materials are renewable, energy-saving, and environmentally friendly, making them an important part of my country's new energy strategy.

[0003] Biomass boilers are mainly used for burning this type of fuel. A large amount of ash is easily generated at the convection point of the boiler. When the ash accumulation is serious, it may affect the overall heat transfer effect and working efficiency. For example, Chinese utility model patent CN210740353U is a three-drum waste heat boiler with a settling chamber. It provides a three-drum boiler with a settling chamber inside and an ash hopper at the bottom for easy collection of ash. However, the existing technology does not provide detailed instructions on how to clean the ash and handle the ash collection, nor does it solve the problem of cleaning the ash hopper. After long-term use, a lot of ash will inevitably adhere to the ash hopper, which not only affects the collection of ash and makes cleaning inconvenient, but also affects the overall working effect.

[0004] Therefore, existing technologies need further improvement and enhancement. Utility Model Content

[0005] The purpose of this invention is to propose a three-drum biomass boiler to solve the problems of poor dust collection, difficulty in dust collection and cleaning, and difficulty in cleaning the ash hopper in existing biomass boilers, which affect the working effect and efficiency of biomass boilers.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This application provides a three-drum biomass boiler, including an upper drum, a main lower drum, and an auxiliary lower drum. An ash collection hopper is provided between the main lower drum and the auxiliary lower drum. A temporary storage layer and a discharge layer are provided inside the ash collection hopper, and a partition plate is provided between the two. The partition plate is provided with an opening and closing door. A discharge door is provided at the bottom of the discharge layer. An ash discharge pipe is provided outside the discharge door. A vibrating element is provided at the connection between the ash discharge pipe and the outer wall of the discharge layer. A cleaning component is provided on the side wall of the discharge layer.

[0008] In a preferred embodiment of this application, the cleaning component includes a telescopic cleaning tube and a cleaning box disposed outside the telescopic cleaning tube. A connecting tube is provided between the telescopic cleaning tube and the cleaning box, and the connecting tube is arranged around the outer wall of the ash-collecting pipe.

[0009] In a preferred embodiment of this application, the telescopic cleaning tube can penetrate into the temporary storage layer and the discharge layer respectively. Both the temporary storage layer and the discharge layer are provided with outward-opening doors, and the telescopic cleaning tube corresponds to the outward-opening door.

[0010] In a preferred embodiment of this application, the door is a double-hinged door structure, and a flexible adhesive layer is provided on the surface of the door at the hinge position of the partition plate.

[0011] In a preferred embodiment of this application, the bottom wall of the discharge layer is also provided with a drainage outlet, which is offset from the discharge gate and has an inclined structure inside.

[0012] In a preferred embodiment of this application, infrared sensors are provided on the inner walls of both the temporary storage layer and the discharge layer to determine the ash thickness inside the temporary storage layer and the discharge layer in real time.

[0013] In a preferred embodiment of this application, a settling chamber is provided between the upper boiler drum, the main lower boiler drum, and the auxiliary lower boiler drum, and convection flues are provided on both sides of the settling chamber, with the convection flues configured in an S-shape.

[0014] The technical solution provided by this utility model can include the following beneficial effects:

[0015] This utility model provides a three-drum biomass boiler. By dividing the ash hopper into a temporary storage layer and a discharge layer, it can ensure that ash collection and discharge can be carried out simultaneously, improving the efficiency of ash collection. On the other hand, by setting an ash discharge pipe at the bottom of the discharge layer, ash is prevented from being exposed during the ash discharge process, reducing the amount of ash scattered in the air and ensuring a clean and safe working environment. In addition, a vibrating element is set at the connection between the ash discharge pipe and the outer wall of the discharge layer. This not only resonates the ash discharge pipe, reducing the amount of ash adhering to the ash discharge pipe, but also resonates within the discharge layer, facilitating the cleaning and collection of ash, making it more convenient to use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a three-drum biomass boiler according to an embodiment of this utility model;

[0017] Figure 2 This is a utility model Figure 1 A magnified view of a section at point A.

[0018] Figure label:

[0019] 1. Upper boiler drum; 2. Main lower boiler drum; 3. Auxiliary lower boiler drum; 4. Ash collection hopper; 41. Temporary storage layer; 42. Discharge layer; 43. Divider plate; 44. Opening and closing door; 45. Unloading door; 5. Ash discharge pipe; 6. Vibrating component; 7. Cleaning assembly; 71. Telescopic cleaning pipe; 72. Cleaning box; 73. Connecting pipe; 74. Electric telescopic component; 8. Settling chamber; 9. Convection flue; 10. Infrared sensor; 11. Frame. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation on this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish and describe features, without any order or emphasis.

[0022] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The following is combined with Figure 1 and Figure 2This invention describes a three-drum biomass boiler, comprising an upper drum 1, a main lower drum 2, and an auxiliary lower drum 3. The diameter of the auxiliary lower drum 3 is smaller than that of the main lower drum 2. An ash collection hopper 4 is provided between the main lower drum 2 and the auxiliary lower drum 3. A temporary storage layer 41 and a discharge layer 42 are provided inside the ash collection hopper 4, and a partition plate 43 is provided between the two. The partition plate 43 is provided with an opening and closing door 44. A discharge door 45 is provided at the bottom of the discharge layer 42. The discharge door 45 can adopt a horizontally moving hydraulic push rod door structure. An ash discharge pipe 5 is provided outside the discharge door 45. A vibrating element 6 is provided at the connection between the ash discharge pipe 5 and the outer wall of the discharge layer 42. A cleaning component 7 is provided on the side wall of the discharge layer 42.

[0025] Among them, such as Figure 1 As shown, the overall structure of the boiler in this application is similar to that of the prior art, both having three boiler structures. A settling chamber 6 is provided between the three boiler structures, and convection flues 9 are provided on both sides of the settling chamber 6. The arrangement and setting scheme of these structures are roughly similar to the prior art, so they will not be described in detail. The difference is that this application improves the structure of the ash collection hopper 4. It not only collects the ash collection hopper 4 in the prior art, so that the dust is concentrated in one ash collection hopper 4, but also improves the internal structure to facilitate the collection, discharge and cleaning of dust, improve the use effect, and facilitate subsequent dust accumulation, thereby improving the working efficiency of the boiler.

[0026] Understandably, compared to the three-drum boilers in the prior art, this application has made changes to the two lower drums, changing the original symmetrical structure to two main and auxiliary drums. The diameter of the auxiliary lower drum 3 can be set to be smaller than the diameter of the main lower drum 2. This not only reduces processing costs but also saves space, leaving room for the ash collection hopper 4 and settling chamber 6, making it easier to collect and clean dust.

[0027] As a preferred embodiment of this application, such as Figure 2 As shown, the cleaning component 7 includes a telescopic cleaning tube 71 and a cleaning box 72 disposed outside the telescopic cleaning tube 71. A connecting tube 73 is provided between the telescopic cleaning tube 71 and the cleaning box 72, and the connecting tube 73 is arranged around the outer wall of the ash-collecting pipe 4.

[0028] The telescopic cleaning pipe 71 can be installed on the frame 11 outside the ash collection pipe 4. The surface of the frame 11 is provided with an electric telescopic component 74, and the telescopic cleaning pipe 71 is installed on the top of the electric telescopic component 74 to drive the telescopic cleaning pipe 71 to move laterally. The telescopic cleaning pipe 71 can penetrate into the temporary storage layer 41 and the discharge layer 42 respectively. Both the temporary storage layer 41 and the discharge layer 42 are provided with outward-opening doors. The telescopic cleaning pipe 71 corresponds to the outward-opening door. When cleaning is required, it is only necessary to first control the outward-opening door to flip outward by the motor. Then the telescopic cleaning pipe 71 penetrates inward and is sprayed for cleaning through the spray structure provided at the head end. It is convenient to use and has high cleaning efficiency.

[0029] In a preferred embodiment, the hinged door 44 is a double-hinged door structure, and a flexible adhesive layer is provided on the hinged surface of the partition plate 43.

[0030] Among them, such as Figure 1 As shown, the opening and closing door 44 can open and close to the outside, and the opening and closing door 44 is tilted at an angle to guide the dust through the tilted opening and closing door 44, so that the dust can flow into the discharge layer 42. In addition, in order to facilitate the collection and transportation of dust, the entire ash hopper 4 has a cone-like structure, which makes the inner wall tilted to guide the dust. The flexible adhesive layer can block the hinge gap of the opening and closing door 44, reducing the occurrence of dust falling into the gap and affecting the opening and closing of the opening and closing door 44.

[0031] Furthermore, the bottom wall of the discharge layer 42 is also provided with a drain outlet, which is offset from the discharge gate 45 and has an inclined structure inside. The structure of the drain outlet can be similar to that of the opening and closing gate 44. In addition, the surface of the channel after opening can be provided with an inwardly inclined guiding structure to facilitate the collection and guidance of liquid.

[0032] As a preferred embodiment of this application, such as Figure 1 As shown, infrared sensors 10 are installed on the inner walls of both the temporary storage layer 41 and the discharge layer 42 to determine the dust thickness inside the temporary storage layer 41 and the discharge layer 42 in real time. After the dust accumulates to a certain level in the temporary storage layer 41, the dust can be transferred to the discharge layer 42. The discharge layer 42 can also detect the dust thickness. Once a certain thickness is detected, the dust can be discharged. This process does not affect the dust collection above, achieving continuous collection and discharge. It is convenient to use and has high work efficiency.

[0033] Optionally, the convection flue 9 between the upper boiler drum 1, the main lower boiler drum 2, and the auxiliary lower boiler drum 3 is set in an S-shape, which can improve the convection effect and facilitate dust collection. In addition, as an optional embodiment of this application, the structure of the telescopic cleaning pipe 71 can be replaced by a fixed sonic soot cleaner. Although the cost is higher, it does not require an additional outward-opening door structure, making cleaning more convenient and avoiding unnecessary dust contact. Furthermore, the hinged opening and closing door 44 structure can also adopt a horizontal hydraulic push rod gate. Although this type of structure is complex, it eliminates the gap problem that may exist in hinges and does not require the addition of a flexible adhesive layer, resulting in a better sealing effect.

[0034] Furthermore, it is understandable that this application may also include a control component, which can control each component through a PLC or microcontroller program, and can process and transmit the information of the infrared sensor 10, so as to link the infrared sensor with the opening and closing door 44 and the unloading door 45, thereby improving the level of intelligence.

[0035] The ash discharge pipe 5 can be made of graphitized silicon carbide material, which is easy to process and has a high thermal conductivity. Multiple oblique holes can be opened on the outer wall of the ash discharge pipe 5, and an air inlet fan can be installed. The air inlet fan introduces fluidized air along the oblique opening, which facilitates the guidance and transportation of dust. A high-frequency vibrator can be installed on the outer edge of the pipe wall to further improve the vibration effect and further reduce the adhesion of dust.

[0036] In this specification, the terms "embodiment," "example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A three pass biomass boiler, characterized in that, It includes an upper boiler drum, a main lower boiler drum, and an auxiliary lower boiler drum. An ash collection hopper is provided between the main lower boiler drum and the auxiliary lower boiler drum. A temporary storage layer and a discharge layer are provided inside the ash collection hopper, and a partition plate is provided between the two. The partition plate is provided with an opening and closing door. A discharge door is provided at the bottom of the discharge layer. An ash discharge pipe is provided outside the discharge door. A vibrating element is provided at the connection between the ash discharge pipe and the outer wall of the discharge layer. A cleaning component is provided on the side wall of the discharge layer.

2. A three pass biomass boiler as claimed in claim 1, wherein, The cleaning assembly includes a telescopic cleaning tube and a cleaning box disposed outside the telescopic cleaning tube. A connecting tube is provided between the telescopic cleaning tube and the cleaning box, and the connecting tube is arranged around the outer wall of the ash-collecting pipe.

3. A three pass biomass boiler according to claim 2, characterized in that, The telescopic cleaning tube can reach into the temporary storage layer and the discharge layer respectively. Both the temporary storage layer and the discharge layer are provided with outward-opening doors, and the telescopic cleaning tube corresponds to the outward-opening doors.

4. A three-pass biomass boiler according to claim 3, characterized in that, The door is a double-hinged door structure, and a flexible adhesive layer is provided on the surface of the door at the hinge position of the partition plate.

5. A three-pass biomass boiler according to claim 4, characterized in that, The bottom wall of the discharge layer is also provided with a drainage outlet, which is offset from the unloading gate and has an inclined structure inside.

6. A three-drum biomass boiler as described in claim 5, characterized in that, Both the temporary storage layer and the discharge layer are equipped with infrared sensors on their inner walls to determine the ash thickness inside the temporary storage layer and the discharge layer in real time.

7. A three-drum biomass boiler as described in claim 6, characterized in that, A settling chamber is provided between the upper boiler drum, the main lower boiler drum, and the auxiliary lower boiler drum. Convection flues are provided on both sides of the settling chamber, and the convection flues are S-shaped.

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