Biomass particle crushing device for boiler combustion

Abstract

The utility model discloses a biomass particle crushing device for boiler combustion, which belongs to the technical field of biomass particle processing, and comprises a crushing tank and a crushing mechanism positioned on the crushing tank, biomass particles suitable for the device are full straw particles, a fixed motor is fixedly mounted on one side wall of the crushing tank, and the fixed motor is fixed on the other side wall of the crushing tank. Wherein an output shaft of the fixed motor is coaxially connected with an inner supporting shaft, the inner supporting shaft is fixedly sleeved with a first supporting cylinder, a U-shaped support is further welded to the side, where the fixed motor is located, of the smashing tank, a hydraulic cylinder is installed on the support, the first supporting cylinder is located on one side of an inner cavity of the smashing tank, and a second supporting cylinder is arranged on the other side of the inner cavity of the smashing tank; wherein a square mounting frame is arranged on one side of the second supporting cylinder. According to the biomass particle smashing device for boiler combustion, straw attached to the supporting barrel and the smashing cutter can be beaten down, and the situation that the straw is continuously attached to the supporting barrel and the smashing cutter, and consequently the smashing effect is reduced is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of biomass pellet processing, and particularly relates to a biomass pellet crushing device for boiler combustion. Background Technique

[0002] Biomass pellets are cold-compacted and formed from crushed biomass straw, forestry waste and other raw materials by using pressure rollers and ring dies at normal temperature. The density of the raw materials is generally 0.1 - 0.13 t / m3, and the density of the formed pellets is 1.1 - 1.3 t / m3, which is convenient for storage and transportation and greatly improves the combustion performance of biomass.

[0003] In the process of realizing the present utility model, the inventor found that there are at least the following problems in this technology: A common type of biomass pellet is a full-straw pellet. At present, when processing full-straw pellets, they need to be crushed. However, in existing crushing devices, such as the patent with the application number CN202321064826.5 - a crushing device for biomass pellet production, during the crushing process, because the amount of straw material is large and the crushing time is long, a lot of straw often adheres to the outside of the crushing knife blade, which in turn leads to a decline in the crushing effect of the crushing knife.

[0004] Therefore, we propose a biomass pellet crushing device for boiler combustion to solve the above problems. Content of the Utility Model

[0005] The main purpose of the present utility model is to provide a biomass pellet crushing device for boiler combustion, which can knock down the straw attached to the support cylinder and the crushing knife, avoiding the decline in the crushing effect caused by the continuous adhesion of straw to the support cylinder and the crushing knife, and can effectively solve the problems in the background technique.

[0006] To achieve the above purpose, the present utility model adopts the following technical scheme:

[0007] A biomass pellet crushing device for boiler combustion includes a crushing tank and a crushing mechanism located on the crushing tank. The biomass pellets applicable to this device are full-straw pellets (such as rice straw, weeds, etc.). A fixed motor is fixedly installed on one side wall of the crushing tank. The output shaft of the fixed motor is coaxially connected with an inner support shaft, and a first support cylinder is fixedly sleeved on the inner support shaft. A U-shaped bracket is also welded on the side of the crushing tank where the fixed motor is located, and a hydraulic cylinder is installed on the bracket.

[0008] The first support cylinder is located on one side of the inner cavity of the crushing tank, and a second support cylinder is provided on the other side of the inner cavity of the crushing tank. An installation frame in the shape of a square is provided on one side of the second support cylinder, and a movable motor is fixedly installed on the inner wall of the installation frame. The output shaft of the movable motor is coaxially connected to the second support cylinder. Slide rods are welded on the opposite sides of the installation frame and the second support cylinder. One of the slide rods is connected to the hydraulic cylinder. Fixed sleeves are slidably arranged on the outer sides of the two slide rods, and the two fixed sleeves are respectively welded to the crushing tank, so that the two slide rods can smoothly slide horizontally in the two fixed sleeves, thereby driving the second support cylinder to translate;

[0009] The crushing mechanism includes a plurality of fixed crushing knives welded to the first support cylinder and a plurality of movable crushing knives welded to the second support cylinder. A group of limit blocks are welded on both sides of the fixed crushing knives and both sides of the movable crushing knives.

[0010] As a preferred implementation, a feeding pipe is fixedly connected to the center of the top wall of the crushing tank, and a discharge pipe is fixedly connected to the center of the bottom wall of the crushing tank; the whole straw particles added through the feeding pipe can just fall between the first support cylinder and the second support cylinder, so as to be crushed by the fixed crushing knives and the movable crushing knives.

[0011] As a preferred implementation, support feet are welded at the four corners of the bottom wall of the crushing tank, and the bottom of the crushing tank is narrowed; so that the whole straw particles in the inner cavity of the crushing tank can be uniformly gathered and discharged through the discharge pipe, and the four support feet are used to stably support the crushing tank and enable the crushed straw materials to be smoothly discharged from the discharge pipe.

[0012] As a preferred implementation, the inner support shaft, the first support cylinder and the second support cylinder are all horizontally arranged, and the inner support shaft is rotatably connected to the inside of the crushing tank; so that when the fixed motor operates, it can drive the inner support shaft to rotate stably. The fixed motor and the movable motor both need to be powered by external power facilities, and the fixed motor and the movable motor are both horizontally distributed.

[0013] As a preferred implementation, the fixed crushing knives and the movable crushing knives are designed in a cross pattern, and the limit blocks on the fixed crushing knives are close to the tips of the movable crushing knives, and the limit blocks on the movable crushing knives are close to the tips of the fixed crushing knives; so that the limit blocks on the fixed crushing knives can touch the whole straw particles attached and wound on the movable crushing knives, and the limit blocks on the movable crushing knives can touch the whole straw particles attached and wound on the fixed crushing knives, and knock down these whole straw particles.

[0014] In summary, the technical effects and advantages of the present utility model are:

[0015] The biomass particle crushing device for boiler combustion, while crushing straw using the crushing mechanism, makes one of the support cylinders move slightly towards both sides, so that the limiting blocks on each support cylinder touch the crushing knives on the other support cylinder, thereby knocking off the straw attached to the support cylinders and crushing knives, avoiding the decline in crushing effect caused by continuous attachment of straw to the support cylinders and crushing knives;

[0016] The biomass particle crushing device for boiler combustion also needs to regularly drive the hydraulic cylinder to operate, driving the installation frame, movable motor, second support cylinder and movable crushing knife to perform reciprocating translation during the crushing process, so that the limiting blocks on the fixed crushing knife can gently touch the movable crushing knife, and the limiting blocks on the movable crushing knife can gently touch the fixed crushing knife, thereby avoiding the problem of functional decline in crushing caused by the attachment of whole straw particles to the outer walls of the fixed crushing knife and movable crushing knife, and making the crushing effect better. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0018] Figure 2 is a horizontal cross-sectional view of the present utility model;

[0019] Figure 3 is the present utility model Figure 2 enlarged view of the structure at A in.

[0020] In the figure: 1, crushing tank; 2, feeding pipe; 3, discharging pipe; 4, support feet; 5, fixed motor; 6, inner support shaft; 7, first support cylinder; 8, fixed crushing knife; 9, support; 10, hydraulic cylinder; 11, sliding rod; 12, fixed sleeve; 13, installation frame; 14, movable motor; 15, second support cylinder; 16, movable crushing knife; 17, limiting block. Detailed Embodiment

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0022] Refer to Figures 1 - 3, a biomass particle crushing device for boiler combustion, comprising a crushing tank 1 and a crushing mechanism located on the crushing tank 1. The biomass particles applicable to this device are all straw particles (such as rice straw, weeds, etc.). A feeding pipe 2 is fixedly connected to the center of the top wall of the crushing tank 1, and a discharge pipe 3 is fixedly connected to the center of the bottom wall of the crushing tank 1. Four support feet 4 are welded to the four corners of the bottom wall of the crushing tank 1. The bottom of the crushing tank 1 is narrowed, so that the crushed all-straw particles in the inner cavity of the crushing tank 1 can be uniformly collected and discharged through the discharge pipe 3. The four support feet 4 are used to stably support the crushing tank 1 and enable the crushed straw material to be smoothly discharged from the discharge pipe 3. A fixed motor 5 is fixedly installed on one side wall of the crushing tank 1. The output shaft of the fixed motor 5 is coaxially connected with an inner support shaft 6. A first support cylinder 7 is fixedly sleeved on the inner support shaft 6. A U-shaped bracket 9 is also welded on the side of the crushing tank 1 where the fixed motor 5 is located. A hydraulic cylinder 10 is installed on the bracket 9;

[0023] The first support cylinder 7 is located on one side of the inner cavity of the crushing tank 1, and a second support cylinder 15 is provided on the other side of the inner cavity of the crushing tank 1. The inner support shaft 6, the first support cylinder 7 and the second support cylinder 15 are all horizontally arranged, and the inner support shaft 6 is rotatably connected to the inside of the crushing tank 1, so that the fixed motor 5 can drive the inner support shaft 6 to rotate stably when running. A square-shaped mounting frame 13 is provided on one side of the second support cylinder 15. A movable motor 14 is fixedly installed on the inner wall of the mounting frame 13. Both the fixed motor 5 and the movable motor 14 need to be powered by external power facilities. The fixed motor 5 and the movable motor 14 are both horizontally distributed. The output shaft of the movable motor 14 is coaxially connected with the second support cylinder 15. Slide rods 11 are welded on the opposite sides of the mounting frame 13 and the second support cylinder 15. One of the slide rods 11 is connected to the hydraulic cylinder 10. Fixed sleeves 12 are respectively slidably provided on the outer sides of the two slide rods 11, and the two fixed sleeves 12 are respectively welded to the crushing tank 1, so that the two slide rods 11 can smoothly slide horizontally in the two fixed sleeves 12, thereby driving the second support cylinder 15 to translate;

[0024] The crushing mechanism includes multiple fixed crushing knives 8 welded to the first support cylinder 7 and multiple moving crushing knives 16 welded to the second support cylinder 15. The whole straw particles added through the feeding pipe 2 can just fall between the first support cylinder 7 and the second support cylinder 15, so as to be subjected to the crushing treatment by the fixed crushing knives 8 and the moving crushing knives 16. A group of limit blocks 17 are welded on both sides of the fixed crushing knives 8 and both sides of the moving crushing knives 16. It should be noted that the fixed crushing knives 8 and the moving crushing knives 16 are designed in a cross pattern, and the limit blocks 17 on the fixed crushing knives 8 are close to the tips of the moving crushing knives 16, and the limit blocks 17 on the moving crushing knives 16 are close to the tips of the fixed crushing knives 8, so that the limit blocks 17 on the fixed crushing knives 8 can touch the whole straw particles attached and wound on the moving crushing knives 16, and the limit blocks 17 on the moving crushing knives 16 can touch the whole straw particles attached and wound on the fixed crushing knives 8, and knock down these straw materials.

[0025] For the biomass particle crushing device used for boiler combustion: during use, the fixed motor 5 and the movable motor 14 are driven to operate with power on. Due to the special structure of the movable motor 14, enough length needs to be reserved for its electrical facilities during wiring. If it is powered by other means, its mobility needs to be noted. Generally speaking, all of these are achievable in the prior art; after the inner support shaft 6 and the movable motor 14 operate, they drive the first support cylinder 7 and the fixed crushing knives 8 thereon, and the second support cylinder 15 and the moving crushing knives 16 thereon to rotate. Then, the whole straw particles added through the feeding pipe 2 fall between the first support cylinder 7 and the second support cylinder 15, so as to be subjected to the crushing work of multiple fixed crushing knives 8 and multiple moving crushing knives 16. Due to the cross design of the fixed crushing knives 8 and the moving crushing knives 16, the crushing of the whole straw particles is more rapid. At the same time, during the crushing process, it is also necessary to regularly drive the hydraulic cylinder 10 to operate to drive the mounting frame 13, the movable motor 14, the second support cylinder 15 and the moving crushing knives 16 to perform reciprocating (in a small range) translation, so that the limit blocks 17 on the fixed crushing knives 8 can gently touch the moving crushing knives 16, and the limit blocks 17 on the moving crushing knives 16 can gently touch the fixed crushing knives 8, thereby avoiding the problem that the outer walls of the fixed crushing knives 8 and the moving crushing knives 16 are attached with whole straw particles, resulting in the decline of their crushing functionality, and making the crushing effect better (when the second support cylinder 15 translates, it drives the two sliding rods 11 to slide in the two fixed sleeves 12, which can ensure the stability of the second support cylinder 15 and the structures thereon).

[0026] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent replacements or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A biomass particle crushing device for boiler combustion, comprising a crushing tank (1) and a crushing mechanism located on the crushing tank (1), characterized in that, One side wall of the crushing tank (1) is fixedly installed with a fixed motor (5). The output shaft of the fixed motor (5) is coaxially connected with an inner support shaft (6). A first support cylinder (7) is fixedly sleeved on the inner support shaft (6). A U-shaped bracket (9) is welded on the side of the crushing tank (1) where the fixed motor (5) is located. A hydraulic cylinder (10) is installed on the bracket (9). The first support cylinder (7) is located on one side of the inner cavity of the crushing tank (1). A second support cylinder (15) is arranged on the other side of the inner cavity of the crushing tank (1). An installation frame (13) in a square shape is arranged on one side of the second support cylinder (15). A movable motor (14) is fixedly installed on the inner wall of the installation frame (13). The output shaft of the movable motor (14) is coaxially connected with the second support cylinder (15). Slide rods (11) are welded on the opposite sides of the installation frame (13) and the second support cylinder (15). One of the slide rods (11) is connected to the hydraulic cylinder (10). Fixed sleeves (12) are respectively slidably arranged on the outer sides of the two slide rods (11), and the two fixed sleeves (12) are respectively welded on the crushing tank (1). The crushing mechanism includes a plurality of fixed crushing knives (8) welded on the first support cylinder (7) and a plurality of movable crushing knives (16) welded on the second support cylinder (15). A group of limit blocks (17) are welded on both sides of the fixed crushing knives (8) and the movable crushing knives (16).

2. The biomass particle crushing device for boiler combustion according to claim 1, characterized in that, A feeding pipe (2) is fixedly connected to the center of the top wall of the crushing tank (1), and a discharging pipe (3) is fixedly connected to the center of the bottom wall of the crushing tank (1).

3. A biomass particle crushing device for boiler combustion according to claim 1, characterized in that, Support feet (4) are welded at the four corners of the bottom wall of the crushing tank (1), and the bottom of the crushing tank (1) is narrowed.

4. A biomass particle crushing device for boiler combustion according to claim 1, characterized in that, The inner support shaft (6), the first support cylinder (7) and the second support cylinder (15) are all horizontally arranged, and the inner support shaft (6) is rotatably connected to the inner side of the crushing tank (1).

5. A biomass particle crushing device for boiler combustion according to claim 1, characterized in that, The fixed crushing knives (8) and the movable crushing knives (16) are designed in a cross pattern, and the limit blocks (17) on the fixed crushing knives (8) are close to the tips of the movable crushing knives (16), and the limit blocks (17) on the movable crushing knives (16) are close to the tips of the fixed crushing knives (8).

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