A processing method for biomass densified briquette fuel

Abstract

The present invention belongs to the technical field of biomass fuel production, and in particular to a processing method for biomass densified briquette fuel. The present invention provides a processing method for biomass densified briquette fuel, which includes the following steps: a: Collect raw materials such as straw, sawdust, and fruit shells, and perform drying treatment; b: Spread the raw materials flat and air-dry them for 3-5 days to reduce the water content of the raw materials to 7-11%; c: Convey the raw materials to the processing chamber of the chopping device, and chop the raw materials with a cutting knife. The working pressure during the cutting of the cutting knife is 80 Pa-150 Pa; d: Screen the raw materials to remove the sand and gravel in the raw materials to obtain fuel raw materials; e: Collect the fuel raw materials with different densities in layers; f: Grind the fuel raw materials with smaller particles into powder, pass through a 100-mesh sieve, and fully mix them with a binder equivalent to 0.2-0.4% of their weight, and press them under the condition of a pressure of 20-30 MPa to obtain blocky materials, and obtain biomass fuel after drying. This application can reduce the wear effect on the processing tool body.

Description

Technical Field

[0001] The present invention belongs to the technical field of biomass fuel production, and particularly relates to a processing method for biomass densified briquette fuel. Background Art

[0002] Biomass briquette fuel is a solid fuel with a certain shape and density processed from biomass raw materials after collection, drying, crushing and other treatments; biomass fuel is an excellent alternative fuel to coal, with a fast resource regeneration speed and is easy to collect and use as the resources are distributed all over the world;

[0003] The existing application number: 202010329427.1, a pretreatment device for raw materials in biomass fuel processing. This application first performs vibration screening on biomass fuel raw materials and sand and gravel through a primary impurity screening device, then crushes the biomass fuel raw materials by rotating a crushing cutter body, and finally performs air screening on the biomass fuel raw materials and fine sand and gravel through a secondary impurity screening device;

[0004] During the preliminary screening process in this application, due to the irregular shape of the biomass fuel after collection, there will be more sand and gravel residues. Then, by rotating the cutter body to cut the biomass fuel, it will cause greater damage to the cutter body. And based on the requirement for the particle size of the biomass fuel, the remaining sand and gravel will continuously damage different positions of the crushing cutter body. Summary of the Invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide a processing method for biomass densified briquette fuel, which can reduce the wear effect on the processing cutter body.

[0006] The present invention provides a processing method for biomass densified briquette fuel, including the following steps:

[0007] a: Collect raw materials such as straw, sawdust and fruit shells, and perform drying treatment;

[0008] b: Spread the raw materials flat and air-dry for 3 - 5 days to reduce the water content of the raw materials to 7 - 11%;

[0009] c: Convey the raw materials to the processing chamber of a chopping device, and chop the raw materials through a cutting knife. The working pressure during the cutting of the cutting knife is 80Pa - 150Pa;

[0010] d: Screen the raw materials to remove the sand and gravel in the raw materials to obtain fuel raw materials;

[0011] e: Collect the fuel raw materials with different densities in layers;

[0012] f: Grind the fuel raw materials with smaller particles into powder, pass through a 100-mesh sieve, fully mix with a binder equivalent to 0.2-0.4% of its weight, press at a pressure of 20-30MPa to obtain a block material, and obtain biomass fuel after drying.

[0013] The shredding device includes a processing enclosure, a U-shaped sealing plate, a cutting knife and a rubber pad. The U-shaped sealing plate is installed in the processing enclosure. The processing enclosure and the U-shaped sealing plate constitute a processing cavity. The processing cavity is used to store raw materials. The processing enclosure is slidably connected with a cutting knife. The cutting knife contacts and cooperates with the rubber pad on the U-shaped sealing plate. The processing enclosure is installed on a bracket, and the angle between the side of the processing enclosure and the upper surface of the bracket can be changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0015] Figure 1 A flow chart of the biomass dense molding fuel processing method provided by the present invention;

[0016] Figure 2 A schematic diagram of the structure of the processing chamber provided by the present invention;

[0017] Figure 3 A schematic diagram of the structure of a cutting knife provided by the present invention;

[0018] Figure 4 A schematic diagram of the structure of the control arm provided by the present invention;

[0019] Figure 5 A schematic diagram of the structure of the blade assembly provided by the present invention;

[0020] Figure 6 A schematic diagram of the structure of the screen plate provided by the present invention;

[0021] Figure 7 A schematic diagram of the structure of the sealing cover provided by the present invention;

[0022] Figure 8 A schematic diagram of the structure of a U-shaped sealing plate provided by the present invention;

[0023] Figure 9 A schematic diagram of the structure of the pressure regulating disk provided by the present invention;

[0024] Figure 10 A schematic diagram of the structure of the overhead extension arm provided by the present invention;

[0025] Figure 11 A schematic diagram of the structure of the hollow seat provided by the present invention;

[0026] Figure 12Schematic structural diagram of the rocking control arm provided by the present invention. Detailed implementation manners

[0027] Combined with the accompanying drawings in the embodiments of the present invention, a biomass densification molding fuel processing method provided by the present invention is described in detail.

[0028] A biomass densification molding fuel processing method includes the following steps:

[0029] a: Collect raw materials such as straws, sawdust, and fruit shells, and perform drying treatment;

[0030] b: Spread the raw materials flat and air-dry for 3 - 5 days to reduce the water content of the raw materials to 7 - 11%;

[0031] c: Convey the raw materials to the processing cavity of the chopping device, and chop the raw materials through a cutting knife. The working pressure during the cutting of the cutting knife is 80 Pa - 150 Pa;

[0032] d: Remove the sand and gravel in the raw materials through screening the raw materials to obtain fuel raw materials;

[0033] e: Collect the fuel raw materials with different densities in layers;

[0034] f: Grind the fuel raw materials with smaller particles into powder, pass through a 100 - mesh sieve, fully mix with a binder equivalent to 0.2 - 0.4% of its weight, and press under the condition of a pressure of 20 - 30 MPa to obtain a block - shaped material, and obtain biomass fuel after drying.

[0035] The mixing of materials such as sand and gravel and porcelain chips will affect the storage and combustion use of the biomass fuel after molding. Therefore, it is necessary to remove materials such as sand and gravel and porcelain chips from the biomass fuel;

[0036] In the existing method of crushing raw materials, the biomass fuel is chopped by rotating the tool body. This will cause greater damage to the tool body. And based on the requirements for the particle size of the biomass fuel, the gap between the tool body and the container will be set smaller, and the remaining sand and gravel will continuously cause damage to different positions of the crushing tool body.

[0037] The embodiments of the present invention are described as follows, see Figure 2-4 :

[0038] The shredding device includes a processing enclosure 1.1, a U-shaped sealing plate 1.5, a cutting knife 1.6, and a rubber pad 1.10. A U-shaped sealing plate 1.5 is installed inside the processing enclosure 1.1. The U-shaped sealing plate 1.5 and the processing enclosure 1.1 form a processing chamber for storing raw materials. The cutting knife 1.6 is slidably connected to the processing enclosure 1.1 and is in contact fit with the rubber pad 1.10 on the U-shaped sealing plate 1.5. The processing enclosure 1.1 is installed on a support 4.1, and the angle between the upper surface of the support 4.1 and the side of the processing enclosure 1.1 can be changed.

[0039] The processing enclosure 1.1 and the U-shaped sealing plate 1.5 form a processing chamber. By continuously inserting and removing the cutting knife 1.6 in the processing chamber, the raw materials in the processing chamber can be cut and crushed. The setting of the rubber pad 1.10 can improve the protection effect on the cutting knife 1.6, control the insertion depth of the cutting knife 1.6 in the processing chamber, and prevent the cutting knife 1.6 from causing tearing damage to the rubber pad 1.10. When the cutting knife 1.6 touches materials such as sand and gravel, the damage caused by the sand and gravel to the cutting knife 1.6 can be reduced under the buffering action of the rubber pad 1.10.

[0040] The U-shaped sealing plate 1.5 can slide inside the processing enclosure 1.1, enabling the cutting knife 1.6 to contact the raw materials at various height levels in the processing chamber and fully cutting the raw materials in the processing chamber.

[0041] The angle between the side of the processing enclosure 1.1 and the upper surface of the support 4.1 can be changed, which is convenient for discharging the air in the processing chamber, improving the contact effect between the cutting knife 1.6 and the raw materials, and increasing the crushing effect.

[0042] In addition, by controlling the processing chamber to swing slightly relative to the upper surface of the support 4.1 and controlling the U-shaped sealing plate 1.5 to move inside the processing enclosure 1.1, the shredded raw materials can be stratified according to the density of the particles. Sand and heavier particles such as plant roots and other materials gather at the lower side of the processing chamber, and the function of stratified discharge can be realized.

[0043] The raw material particles with a smaller density are used for pressing and forming biomass fuels. After the raw material particles with a larger density are mixed with a binder, they adhere to the outside of the biomass fuel to form a hard protective shell, which can improve the integrity of the biomass fuel during transportation.

[0044] The embodiments of the present invention will be described. Refer to Figure 3-5 :

[0045] There are two cutting knives 1.6. The cutting knives 1.6 penetrate and are slidably connected in a sealing groove plate 1.3 on a processing enclosure plate 1.1. A control arm 1.7 is fixedly connected to the cutting knives 1.6. An extension frame 1.8 is fixedly connected to the processing enclosure plate 1.1. A double-sided groove plate 1.9 for controlling the alternating extension of the two cutting knives 1.6 is rotatably connected to the extension frame 1.8. A cylinder on the control arm 1.7 is slidably connected to the double-sided groove plate 1.9.

[0046] A stepping motor for driving the small-range reciprocating rotation of the double-sided groove plate 1.9 is installed on the extension frame 1.8. The output shaft of the stepping motor is fixedly connected to a rotating shaft in the middle of the double-sided groove plate 1.9. Starting the stepping motor can make the two cutting knives 1.6 extend alternately to continuously cut the raw material in the processing cavity. During this process, the alternately extending cutting knives 1.6 can effectively reduce the wear caused by the raw material to the cutting knives 1.6;

[0047] The sealing groove plate 1.3 functions as a seal.

[0048] For the description of the embodiments of the present invention, see Figure 3-5 :

[0049] The cutting knife 1.6 is composed of a plurality of knife body splicing parts 1.6.1 spliced end to end.

[0050] The cutting knife 1.6 composed of a plurality of knife body splicing parts 1.6.1 spliced end to end can maintain the sharpness of the blade during long-term use;

[0051] When switching the blade, the used blade is installed at the tail of the plurality of knife body splicing parts 1.6.1, so as to maintain the overall length and strength of the cutting knife 1.6;

[0052] The sealing groove plate 1.3 can limit and guide the plurality of knife body splicing parts 1.6.1 and improve the connection effect between the plurality of knife body splicing parts 1.6.1.

[0053] For the description of the embodiments of the present invention, see Figure 2 、 Figure 8 :

[0054] The U-shaped sealing plate 1.5 is provided with a material flow port, and a baffle is provided on the material flow port.

[0055] The material flow port is used for filling and discharging materials, and the angle between the side of the processing enclosure plate 1.1 and the upper surface of the support 4.1 is adjusted to change the orientation of the material flow port.

[0056] For the description of the embodiments of the present invention, see Figure 8 :

[0057] The U-shaped sealing plate 1.5 can slide on the processing enclosure plate 1.1.

[0058] The U-shaped sealing plate 1.5 can slide on the processing enclosure plate 1.1, increasing the contact effect between the cutting tool 1.6 and the raw material.

[0059] The embodiments of the present invention will be described with reference to Figure 8 :

[0060] A track frame 1.2 is fixedly connected to the processing enclosure plate 1.1, and a slide bar fixedly connected to the U-shaped sealing plate 1.5 is slidably connected to the track frame 1.2.

[0061] The track frame 1.2 is installed on the processing enclosure plate 1.1 through fasteners, and a slide bar is installed on the U-shaped sealing plate 1.5 through fasteners. The slide bar slides on the track frame 1.2, reducing the direct friction between the U-shaped sealing plate 1.5 and the processing enclosure plate 1.1, and thus improving the smooth movement effect of the U-shaped sealing plate 1.5;

[0062] The fasteners are selected from spring screws or bolts.

[0063] The embodiments of the present invention will be described with reference to Figure 2 , Figure 6 :

[0064] Extension bins 1.4 are welded to both the upper and lower sides of the processing enclosure plate 1.1.

[0065] A reinforcing plate is welded at the bending part of the U-shaped sealing plate 1.5. The setting of the reinforcing plate can increase the movement stability of the U-shaped sealing plate 1.5;

[0066] The setting of the extension bins 1.4 can increase the accommodation capacity of the processing cavity for the raw material.

[0067] The embodiments of the present invention will be described with reference to Figure 8 :

[0068] The shredding device further includes an overhead extension arm 2.1 and a screw 2.2. Overhead extension arms 2.1 are symmetrically and fixedly connected to the upper and lower ends of the U-shaped sealing plate 1.5, and a screw 2.2 is rotatably connected between the two overhead extension arms 2.1. The screw 2.2 is in threaded transmission connection with a transmission block on the track frame 1.2.

[0069] A rotating motor is installed on one side of the overhead extension arm 2.1, and the output shaft of the rotating motor is fixedly connected to the screw 2.2. By starting the rotating motor, the screw 2.2 drives the transmission block on the track frame 1.2 to move up and down, so that the U-shaped sealing plate 1.5 can move relative to the processing enclosure plate 1.1;

[0070] There is a certain distance between the lower end of the overhead extension arm 2.1 and the upper side of the U-shaped sealing plate 1.5, which can increase the sliding range of the slide bar on the track frame 1.2.

[0071] The embodiments of the present invention will be described below. Refer to Figure 6-7 :

[0072] A blanking groove 1.1.1 is provided on the side of the processing apron 1.1. A screen plate 1.1.2 is provided on the blanking groove 1.1.1, and a sealing cover 1.1.3 is detachably installed at the screen plate 1.1.2.

[0073] Adjust the angle between the side of the processing apron 1.1 and the upper surface of the support 4.1 so that the opening of the blanking groove 1.1.1 faces downward. Open the sealing cover 1.1.3 and the screen plate 1.1.2, and the raw materials in the processing cavity can be discharged.

[0074] Install the screen plate 1.1.2 and remove the sealing cover 1.1.3, which can intercept large-particle raw materials. The intercepted large-particle raw materials continue to be prepared for cutting in the processing cavity.

[0075] The embodiments of the present invention will be described below. Refer to Figure 9-10 :

[0076] The chopping device further includes a pressure regulating disk 3.1, a depth control arm 3.2 and a filling chute pipe 3.3. The depth control arm 3.2 is slidably connected to the U-shaped sealing plate 1.5 on one side. The depth control arm 3.2 is installed on the pressure regulating disk 3.1, and the filling chute pipe 3.3 is installed on the pressure regulating disk 3.1. The filling chute pipe 3.3 penetrates through the U-shaped sealing plate 1.5, and a cover is provided on the filling chute pipe 3.3.

[0077] A hydraulic cylinder for controlling the distance between the depth control arm 3.2 and the U-shaped sealing plate 1.5 is installed between the depth control arm 3.2 and the U-shaped sealing plate 1.5. Starting the hydraulic cylinder can make the depth control arm 3.2 drive the pressure regulating disk 3.1 to extrude the raw materials in the processing cavity, facilitating the discharge of the air mixed in the raw materials and improving the contact effect between the raw materials and the cutting knife 1.6.

[0078] The filling chute pipe 3.3 is used to fill the processing cavity with materials.

[0079] The embodiments of the present invention will be described below. Refer to Figure 11 :

[0080] The shredding device further includes a partition plate 3.4, a hollow seat 1.8.1 and a solid seat 1.8.2. The partition plate 3.4 is detachably mounted on the U-shaped sealing plate 1.5. The partition plate 3.4 can penetrate through the pressure regulating disc 3.1. One side of the partition plate 3.4 is separated from the surface of the rubber pad 1.10 by the pressure regulating disc 3.1. The protruding frame 1.8 is composed of the hollow seat 1.8.1 and the solid seat 1.8.2. The hollow seat 1.8.1 is fixedly connected to the processing enclosure 1.1, and the solid seat 1.8.2 is slidably connected to the hollow seat 1.8.1. The positions of the hollow seat 1.8.1 and the solid seat 1.8.2 are locked by fasteners. The partition plate 3.4 is used to separate fuel raw materials with different densities.

[0081] Under the action of the rubber pad 1.10, the partition plate 3.4 can separate the processing cavity;

[0082] Controlling the processing cavity to swing slightly relative to the upper surface of the support base 4.1 and controlling the U-shaped sealing plate 1.5 to move within the processing enclosure 1.1 can stratify the shredded raw materials according to particle density. Sands and heavier particles such as plant rhizomes and other materials gather on the lower side of the processing cavity. Then, adjust the angle between the side of the processing enclosure 1.1 and the upper surface of the support base 4.1 to make the opening of the blanking chute 1.1.1 face downward. During this process, insert the partition plate 3.4 to separate the raw materials in the processing cavity, so that the raw materials mixed with materials such as sands in the area near the blanking chute 1.1.1 can be discharged preferentially;

[0083] Furthermore, by using the partition plate 3.4 to separate the raw materials in the processing cavity multiple times, it is convenient to screen the raw materials constituting the biomass fuel according to different densities, thereby improving the forming effect of the biomass fuel.

[0084] The embodiments of the present invention will be described with reference to Figure 12 :

[0085] The shredding device further includes a rocking control arm 4.2. The rocking control arm 4.2 is rotatably connected to the support base 4.1, and the rocking control arm 4.2 is fixedly connected to the processing enclosure 1.1. The rocking control arm 4.2 is used to control the opening direction of the blanking chute 1.1.1.

[0086] The rocking control arm 4.2 is provided to rotate the processing enclosure 1.1 on the support base 4.1, and the rocking control arm 4.2 has a relatively large length, which can balance the gravity at both ends of the hinge joint between the support base 4.1 and the rocking control arm 4.2.

Claims

1. A processing method for biomass densified forming fuel, characterized in that: It includes the following steps: a: Collect raw materials of straw, sawdust and fruit shells, and conduct drying treatment; b: Spread out the air-dried raw materials to reduce the water content of the raw materials to 7-11%; c: Convey the raw materials to the processing cavity of the chopping device, and chop the raw materials with a cutting knife; d: Remove the sand and gravel in the raw materials by screening the raw materials to obtain fuel raw materials; e: Collect the fuel raw materials with different densities in layers; f: Grind the fuel raw materials with smaller particles into powder, pass through a 100-mesh sieve, fully mix with a binder equivalent to 0.2-0.4% of its weight, and press under the condition of a pressure of 20-30 MPa to obtain blocky materials, and obtain biomass fuels after drying; The fuel raw materials with smaller particles are the fuel raw materials in the layer with relatively larger density after collecting the fuel raw materials with different densities in layers; The chopping device includes a processing enclosure (1.1), a U-shaped sealing plate (1.5), a cutting knife (1.6) and a rubber pad (1.10). A U-shaped sealing plate (1.5) is slidably connected inside the processing enclosure (1.1). The processing enclosure (1.1) and the U-shaped sealing plate (1.5) form a processing cavity for storing raw materials. A cutting knife (1.6) is slidably connected to the processing enclosure (1.1). The cutting knife (1.6) is in contact and cooperation with the rubber pad (1.10) on the U-shaped sealing plate (1.5). The processing enclosure (1.1) is installed on a support (4.1), and the angle between the side of the processing enclosure (1.1) and the upper surface of the support (4.1) can be changed; There are two cutting knives (1.6). The cutting knives (1.6) penetrate and are slidably connected in the sealing groove plate (1.3) on the processing enclosure (1.1). A control arm (1.7) is provided on the cutting knife (1.6). An extension bracket (1.8) is installed on the processing enclosure (1.1). A double-sided groove plate (1.9) for controlling the alternating extension of the two cutting knives (1.6) is rotatably connected to the extension bracket (1.8). The double-sided groove plate (1.9) is slidably connected to the cylinder on the control arm (1.7). The cutting knife (1.6) is composed of a plurality of knife body splicing parts (1.6.1) spliced end to end; A material circulation port is provided on the U-shaped sealing plate (1.5), and a baffle is provided on the material circulation port; A track bracket (1.2) is installed on the processing enclosure (1.1), and a slide bar installed on the U-shaped sealing plate (1.5) is slidably connected to the track bracket (1.2); Extension bins (1.4) are installed on both the upper and lower sides of the processing enclosure (1.1); Overhead extension arms (2.1) are symmetrically installed at both the upper and lower ends of the U-shaped sealing plate (1.5). A screw rod (2.2) is rotatably connected between the two overhead extension arms (2.1). The screw rod (2.2) is in threaded transmission connection with the transmission block on the track bracket (1.2); A blanking groove (1.1.1) is provided on the side of the processing enclosure (1.1). A screen plate (1.1.2) is provided on the blanking groove (1.1.1), and a sealing cover (1.1.3) is detachably installed outside the screen plate (1.1.2); The shredding device further includes a pressure regulating disc (3.1), a depth control arm (3.2) and a charging trough pipe (3.3). The depth control arm (3.2) is slidably connected to the U-shaped sealing plate (1.5) on one side. The depth control arm (3.2) is installed on the pressure regulating disc (3.1), and the charging trough pipe (3.3) is installed on the pressure regulating disc (3.1). The charging trough pipe (3.3) penetrates through the U-shaped sealing plate (1.5), and a cover is provided on the charging trough pipe (3.3). The shredding device further includes a partition plate (3.4), a hollow seat (1.8.1) and a solid seat (1.8.2). The partition plate (3.4) is detachably installed on the U-shaped sealing plate (1.5). The partition plate (3.4) can penetrate through the pressure regulating disc (3.1). The space between one side of the partition plate (3.4) and the surface of the rubber pad (1.10) is separated by the pressure regulating disc (3.1). The protruding frame (1.8) is composed of the hollow seat (1.8.1) and the solid seat (1.8.2). The hollow seat (1.8.1) is fixedly connected to the processing enclosure (1.1), and the solid seat (1.8.2) is slidably connected to the hollow seat (1.8.1). The positions of the hollow seat (1.8.1) and the solid seat (1.8.2) are locked by fasteners. The partition plate (3.4) is used to separate fuel raw materials with different densities. The shredding device further includes a rocking control arm (4.2). The rocking control arm (4.2) is rotatably connected to the support base (4.1). The rocking control arm (4.2) is fixedly connected to the processing enclosure (1.1). The rocking control arm (4.2) is used to control the opening direction of the blanking chute (1.1.1).

2. A biomass densification molding fuel processing method according to claim 1, characterized in that: After laying the raw materials flat, air-dry the raw materials for 3 - 5 days.

3. A biomass densification molding fuel processing method according to claim 1, characterized in that: When shredding the raw materials with the cutting knife, the working pressure of the cutting knife is 80 Pa - 150 Pa.

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