Biomass pellet fuel and preparation method thereof

Abstract

The invention discloses a biomass pellet fuel and a preparation method, and relates to the technical field of fuel production and processing, the preparation method comprises the following steps: crushing: conveying a biomass raw material to be treated into a crusher for crushing to form uniform material chips; drying: conveying the material scraps into a drying machine from the crusher for drying; granulation: putting the dried material chips into a granulation forming machine to form formed regular material particles; wherein material scraps are conveyed into the drying machine from the pulverizer through the conveyor, and a dustproof device is arranged on the conveyor and used for collecting and cleaning dust generated when the conveyor conveys materials; according to the preparation method, the dust entrained by the material scraps is collected through the dustproof device, so that dust pollution caused by the entrained dust in subsequent drying and granulation procedures to corresponding preparation equipment is avoided, the subsequent cleaning work intensity is reduced, and the quality of the material prepared by the preparation method is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of fuel production and processing, and specifically relates to a biomass pellet fuel and a preparation method thereof. Background Art

[0002] Biomass fuel is a renewable energy source converted from organic matter (such as plants, animal waste or other biological materials). Common biomass fuels include wood, straw, garbage, and biofuels produced by fermentation (such as bioethanol and biodiesel).

[0003] In order to facilitate storage and transportation, biofuels usually need to be pelletized to increase the energy density of biomass fuels and make them easier to store and transport. As a clean, low-carbon, renewable energy source, biomass pellet fuel is economical and environmentally friendly. It is a high-quality, environmentally friendly fuel that replaces conventional fossil energy, making biomass fuels gradually play an increasingly important role in the global energy transition. However, when existing biomass fuels are pelletized, especially when the materials are crushed, the crushed materials generate dust, so that the crushed materials carry dust when passing through the conveying, drying, granulation and other equipment, causing pollution to the corresponding equipment, increasing the subsequent cleaning workload, and affecting the cleanliness of the processing environment. Summary of the invention

[0004] The purpose of the present invention is to provide a biomass pellet fuel with a simple structure and reasonable design and a preparation method in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A method for preparing biomass pellet fuel comprises the following steps:

[0007] S1. Crushing: transporting the biomass raw materials to be processed to a crusher for crushing to form uniform material crumbs;

[0008] S2, drying: the material scraps are transported from the crusher to the dryer for drying;

[0009] S3, granulation: the dried material scraps are put into a granulation molding machine to form regular material particles;

[0010] Among them, in step S2, the material scraps are conveyed from the crusher to the dryer through a conveyor, and a dust-proof device is provided on the conveyor, and the dust-proof device is used to collect and clean the dust generated when the conveyor conveys the material.

[0011] As a further optimization solution of the present invention, the conveyor includes a feeding shell, the input end of the feeding shell is connected to the output end of the pulverizer, and the output end of the feeding shell is connected to the input end of the dryer;

[0012] In step S2, a dust-proof device for preparing the biomass pellet fuel is arranged on the feed shell, and the dust-proof device includes a dust suction component, a filter plate, a scraper and a scraper drive component. The filter plate is arranged in the feed shell, and the dust suction component is used to collect dust from the crushed material passing through the feed shell. The output end of the scraper drive component is connected to the scraper transmission. Under the drive of the scraper drive component, the scraper end of the scraper moves back and forth along the surface of the filter plate.

[0013] As a further optimization scheme of the present invention, the dust collection assembly includes an exhaust fan, a collection box is arranged in the feed shell, the collection box is connected to the conveying area of ​​the feed shell through a filter plate, and an exhaust fan is also arranged on the feed shell, and the exhaust end of the exhaust fan is connected to the collection box.

[0014] As a further optimization scheme of the present invention, the direction in which the scraping end of the scraper reciprocates along the filter plate surface is parallel to the conveying direction of the material. Under the drive of the scraper drive assembly, the speed at which the scraper moves along the conveying direction is greater than the speed at which the scraper moves in the opposite direction of the conveying direction.

[0015] As a further optimization scheme of the present invention, the scraper driving assembly includes a motor, a turntable, a rocker arm and a limit shaft. The output end of the motor is fixedly connected to the turntable, and a limit rod is eccentrically arranged on the turntable. A limit groove is provided on the rocker arm. The limit rod is slidably connected to the rocker arm through the limit groove. One end of the rocker arm is rotatably connected to the scraper, and the other end of the rocker arm is slidably connected to the limit shaft. The limit shaft is fixedly arranged on the feed shell.

[0016] As a further optimization solution of the present invention, a guide block is provided at one end of the scraper away from the swing rod, and the guide block is slidably connected to a guide groove provided on the feeding shell.

[0017] As a further optimization scheme of the present invention, the conveyor includes a conveyor belt and a conveying drive member, the output end of the conveying drive member is fixedly connected to the conveying roller, and the conveyor belt is sleeved on the conveying roller, wherein baffles are arranged on both sides of the conveyor belt along the conveying direction of the conveyor belt.

[0018] As a further optimization solution of the present invention, a material guide plate is provided at the input end of the dryer, the material guide plate is arranged obliquely, and one end of the material guide plate close to the conveyor belt is in contact with the surface of the conveyor belt.

[0019] As a further optimization solution of the present invention, a discharge pipe is provided at the discharge end of the pulverizer, and an inclined surface is provided at one end of the discharge pipe adjacent to the conveyor belt.

[0020] The present invention also provides a biomass pellet fuel, which is prepared using the above-mentioned biomass pellet fuel preparation method.

[0021] The present invention has at least the following beneficial effects: the present invention provides a biomass pellet fuel and a preparation method thereof, the biomass pellet fuel preparation method comprising crushing, drying and granulation, in the drying process, the material scraps are conveyed from the crusher to the dryer by means of a conveyor, and the dust entrained by the material scraps is collected by arranging a dust prevention device on the conveyor, so as to effectively avoid dust pollution to the corresponding preparation equipment caused by the dust entrained by the material scraps when entering the subsequent drying and granulation processes, reduce the intensity of subsequent cleaning work, and ensure the quality of the material prepared by the above-mentioned preparation method;

[0022] Moreover, the scraper arranged in the dust prevention device cleans the filter plate reciprocatingly to avoid clogging of the filter plate with material chips, thereby ensuring the working quality of the filter plate. By controlling the speed of the scraper moving in the conveying direction to be greater than the speed of the scraper moving in the opposite direction of the conveying direction, when the scraper moves quickly in the conveying direction, the large-sized material chips cleaned are pushed in the conveying direction. The rapid movement ensures the smooth transmission of the material and helps the conveying effect of the material. The slow movement of the scraper in the opposite direction of the conveying direction reduces the force pushing in the opposite direction on the large-sized material chips, which helps prevent the backflow or re-accumulation of the material, thereby maintaining the fluidity of the material on the conveyor belt and improving the overall working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a flow chart of the method for preparing biomass pellet fuel of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the pulverizer, conveyor, dryer and dust prevention device in the present invention;

[0025] Figure 3 The present invention Figure 2 A schematic diagram of the front structure of

[0026] Figure 4 It is a partial cross-sectional structural schematic diagram of the dustproof device of the present invention;

[0027] Figure 5 It is a schematic structural diagram of the dustproof device of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the scraper of the present invention.

[0029] In the figure: 1. crusher; 11. feeding port; 12. feeding pipe; 2. conveyor; 21. feeding shell; 22. conveyor belt; 23. baffle; 3. dryer; 6. dust prevention device; 61. exhaust fan; 62. collecting box; 63. filter plate; 64. scraper; 641. scraper blade; 65. swing arm; 66. limit rod; 67. limit shaft; 68. turntable; 69. motor. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0031] In one embodiment, see Figure 1 and Figure 2 The present invention provides a method for preparing biomass pellet fuel, comprising the following steps:

[0032] S1, crushing: conveying the biomass raw material to be processed to the crusher 1 for crushing to form uniform material crumbs; wherein, the staff can feed the biomass raw material to be processed into the crusher 1 through the feeding port 11;

[0033] S2, drying: the material scraps are transported from the crusher 1 to the dryer 3 for drying;

[0034] S3, granulation: the dried material scraps are put into a granulation molding machine to form regular material particles;

[0035] Among them, in step S2, the material scraps are conveyed from the crusher 1 to the dryer 3 through the conveyor 2, and the conveyor 2 is provided with a dustproof device 6, which is used to collect and clean the dust generated when the conveyor 2 conveys the material.

[0036] In the above embodiment, through the above preparation method, by means of setting a dust prevention device 6 on the conveyor 2, the dust entrained by the crushed material crumbs is collected by the dust prevention device 6 when passing through the conveyor 2, thereby effectively avoiding the dust pollution caused to the corresponding preparation equipment by the dust entrained when the material crumbs enter the subsequent drying and granulation processes, reducing the intensity of subsequent cleaning work, and ensuring the quality of the material prepared by the above preparation method.

[0037] Continue reading Figure 3 The conveyor 2 includes a feeding housing 21, the input end of the feeding housing 21 is connected to the output end of the pulverizer 1, and the output end of the feeding housing 21 is connected to the input end of the dryer 3;

[0038] In step S2, a dust-proof device 6 for preparing the biomass pellet fuel is arranged on the feed shell 21, and the dust-proof device 6 includes a dust suction component, a filter plate 63, a scraper 64 and a scraper drive component. The filter plate 63 is arranged in the feed shell 21, and the dust suction component is used to collect dust from the crushed material passing through the feed shell 21. The output end of the scraper drive component is transmission-connected with the scraper 64. Under the drive of the scraper drive component, the scraping end of the scraper 64 reciprocates along the surface of the filter plate 63.

[0039] Under the action of the dust suction component, the dust entrained by the material chips in the feeding shell 21 is sucked away through the filter plate, while the material chips with large-sized structures are blocked outside the filter plate 63. In order to prevent the material chips with large-sized structures from blocking the suction port of the filter plate 63, the scraper 64 is used to scrape and clean the material chips outside the filter plate 63 back and forth, thereby effectively ensuring the dust absorption and processing effect.

[0040] For example, see Figure 3 The dust collection assembly includes an exhaust fan 61, a collection box 62 is provided in the feeding housing 21, and the collection box 62 is connected to the conveying area of ​​the feeding housing 21 through a filter plate 63. The feeding housing 21 is also provided with an exhaust fan 61, and the exhaust end of the exhaust fan 61 is connected to the collection box 62. Under the operation of the exhaust fan 61, the dust passes through the filter plate 63 along the flow direction of the airflow and enters the collection box 62 for collection. The staff only needs to clean the collection box 62 regularly.

[0041] It should be noted that, please continue to refer to Figure 3 The direction in which the scraping end of the scraper 64 reciprocates along the surface of the filter plate 63 is parallel to the conveying direction of the material. Under the drive of the scraper drive assembly, the speed of the scraper 64 moving along the conveying direction is greater than the speed of the scraper 64 moving in the opposite direction of the conveying direction. Therefore, when the scraper 64 moves quickly along the conveying direction, the large-sized material scraps cleaned are pushed toward the conveying direction. The rapid movement ensures the smooth transmission of the material and helps the conveying effect of the material. The slow movement of the scraper 64 in the opposite direction of the conveying direction reduces the reverse pushing force on the large-sized material scraps, which helps prevent the backflow or re-accumulation of the material, thereby maintaining the material fluidity on the conveyor belt and improving the overall work efficiency.

[0042] It should be noted that Figure 3 Taking the shown orientation as an example, the conveying direction of the material is from the pulverizer 1 to the dryer 3 .

[0043] For example, see Figure 4 and Figure 5The scraper driving assembly includes a motor 69, a turntable 68, a rocker arm 65 and a limit shaft 67. The output end of the motor 69 is fixedly connected to the turntable 68. A limit rod 66 is eccentrically arranged on the turntable 68. A limit groove is provided on the rocker arm 65. The limit rod 66 is slidably connected to the rocker arm 65 through the limit groove. One end of the rocker arm 65 is rotatably connected to the scraper 64. The other end of the rocker arm 65 is slidably connected to the limit shaft 67. The limit shaft 67 is fixedly arranged on the feeding shell.

[0044] In the above embodiment, Figure 4 Taking the position shown in the figure as an example, driven by the motor 69, the turntable 68 rotates counterclockwise, and under the constraints of the swing rod 65, the limit rod 66 and the limit shaft 67, the swing rod 65 drives the scraper 64 to move back and forth. Figure 4 The diagram shows the structure when the scraper 64 is at the leftmost position. As the turntable 68 continues to rotate counterclockwise, the pendulum 65 swings clockwise, wherein the movement trajectory of the limit rod 66 along the turntable 68 is a concentric circle with the turntable 68. Under the uniform counterclockwise rotation of the turntable 68, the time taken for the pendulum 65 to swing clockwise from the tangent position to the left side of the concentric circle to the tangent position to the right side of the concentric circle is less than the time taken for the pendulum 65 to swing counterclockwise from the tangent position to the right side of the concentric circle to the tangent position to the left side of the concentric circle, thereby making the speed of the scraper 64 moving right greater than the speed of the scraper 64 moving left.

[0045] It should be noted that, please continue to refer to Figure 5 A guide block is provided at one end of the scraper 64 away from the rocker rod 65. The guide block is slidably connected to a guide groove provided on the feeding shell, which helps to stabilize the scraper 64 when it moves back and forth.

[0046] It should be noted that if Figure 6 As shown, scraping blades 641 are symmetrically arranged on both sides of the scraper 64, so that when the scraper 64 moves back and forth, the filter plate 63 can be cleaned in two directions.

[0047] For example, see Figure 3 and Figure 5 The conveyor 2 includes a conveyor belt 22 and a conveying drive member. The output end of the conveying drive member is fixedly connected to the conveying roller. The conveyor belt 22 is sleeved on the conveying roller. Along the conveying direction of the conveyor belt 22, baffles 23 are provided on both sides of the conveyor belt 22. The baffles 23 are used to laterally constrain the material to ensure the orderly transportation of material chips.

[0048] It should be noted that, see Figure 2 The driving member is a driving motor. Driven by the driving motor, the conveying roller drives the conveying belt 22 to work and transport the materials.

[0049] It should be noted that, please continue to refer to Figure 3 A material guide plate is provided at the input end of the dryer 3. The material guide plate is inclined, and one end of the material guide plate close to the conveyor belt 22 is in contact with the surface of the conveyor belt 22, so that the material on the conveyor belt 22 adjacent to the dryer 3 is completely transported to the dryer 3 through the material guide plate, thereby ensuring the conveying effect.

[0050] It should be noted that, please continue to refer to Figure 3 The discharging end of the pulverizer 1 is provided with a discharging pipe 12, and one end of the discharging pipe 12 adjacent to the conveyor belt 22 is provided with an inclined surface, which is inclined toward the conveying direction to ensure that the material scraps crushed by the pulverizer 1 are tilted and poured onto the conveyor belt 22 under the action of gravity, thereby ensuring the discharging effect.

[0051] The biomass pellet fuel preparation method, when conveying the crushed material scraps, uses the dust prevention device 6 to collect and clean the dust entrained in the material scraps, thereby effectively avoiding the dust pollution caused to the corresponding preparation equipment by the dust entrained when the material scraps enter the subsequent drying and granulation process, reducing the intensity of subsequent cleaning work, and ensuring the quality of the material prepared by the above preparation method. Specifically, the crusher 1 crushes the material, and the crushed material scraps are conveyed through the conveyor belt 22. At this time, the exhaust fan 61 is started, and the dust entrained by the material on the conveyor belt 22 is absorbed into the collection box 62 along with the air flow through the filter plate 63, so as to realize the collection of dust;

[0052] The large-sized material scraps are blocked outside the filter plate 63. At this time, in order to prevent the material scraps from clogging the filter plate 63, the rotary disk 68 is driven by the motor 69 to drive the swing rod 65 to move through the limit rod 66, and under the constraint of the limit shaft 67, the swing rod 65 drives the scraper 64 to move back and forth along the filter material surface of the filter plate 63 and rub against the filter material surface of the filter plate 63, so that the large-sized material scraps on the filter plate 63 are cleaned off and fall onto the conveyor belt 22 to continue to be conveyed to the dryer 3. In addition, the speed of the scraper 64 moving in the conveying direction is greater than the speed of the scraper 64 moving in the opposite direction of the conveying direction, so that when the scraper 64 moves quickly in the conveying direction, the cleaned large-sized material scraps are pushed in the conveying direction. The fast movement ensures the smooth transmission of the material and contributes to the conveying effect of the material. The slow movement of the scraper 64 in the opposite direction of the conveying direction reduces the reverse pushing force on the large-sized material scraps, which helps to prevent the backflow or re-accumulation of the material, thereby maintaining the material fluidity on the conveyor belt and improving the overall work efficiency.

[0053] In one embodiment, the present invention also provides a biomass pellet fuel, which is prepared using the above-mentioned biomass pellet fuel preparation method, and can ensure that the amount of dust entrained in the pellet material is reduced, thereby ensuring the quality of the biomass pellet fuel.

[0054] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for preparing biomass pellet fuel, characterized in that: The steps include: S1. Crushing: conveying the biomass raw material to be processed to a crusher (1) for crushing to form uniform material crumbs; S2, drying: conveying the material crumbs from the pulverizer (1) to the dryer (3) for drying; S3, granulation: the dried material scraps are put into a granulation molding machine to form regular material particles; In step S2, the material scraps are transported from the crusher (1) to the dryer (3) via a conveyor (2), and a dust prevention device (6) is provided on the conveyor (2). The dust prevention device (6) is used to collect and clean the dust generated when the conveyor (2) transports the material.

2. The method for preparing biomass pellet fuel according to claim 1, characterized in that: The conveyor (2) comprises a feeding housing (21), the input end of the feeding housing (21) is connected to the output end of the pulverizer (1), and the output end of the feeding housing (21) is connected to the input end of the dryer (3); In step S2, a dust-proof device (6) for preparing the biomass pellet fuel is arranged on the feed housing (21), and the dust-proof device (6) includes a dust collection component, a filter plate (63), a scraper (64) and a scraper drive component. The filter plate (63) is arranged in the feed housing (21), and the dust collection component is used to collect dust from the crushed material passing through the feed housing (21). The output end of the scraper drive component is transmission-connected to the scraper (64). Under the drive of the scraper drive component, the scraper end of the scraper (64) reciprocates along the surface of the filter plate (63).

3. The method for preparing biomass pellet fuel according to claim 2, characterized in that: The dust collection assembly comprises an exhaust fan (61), a collection box (62) is arranged in the material conveying shell (21), the collection box (62) is connected to the conveying area of ​​the material conveying shell (21) through a filter plate (63), and an exhaust fan (61) is also arranged on the material conveying shell (21), and the exhaust end of the exhaust fan (61) is connected to the collection box (62).

4. The method for preparing biomass pellet fuel according to claim 3, characterized in that: The direction in which the scraping end of the scraper (64) reciprocates along the surface of the filter plate (63) is parallel to the conveying direction of the material. Driven by the scraper drive assembly, the speed at which the scraper (64) moves along the conveying direction is greater than the speed at which the scraper (64) moves in the opposite direction of the conveying direction.

5. The method for preparing biomass pellet fuel according to claim 4, characterized in that: The scraper drive assembly comprises a motor (69), a rotating disk (68), a rocker arm (65) and a limit shaft (67); the output end of the motor (69) is fixedly connected to the rotating disk (68); a limit rod (66) is eccentrically arranged on the rotating disk (68); a limit groove is arranged on the rocker arm (65); the limit rod (66) is slidably connected to the rocker arm (65) through the limit groove; one end of the rocker arm (65) is rotatably connected to the scraper (64); the other end of the rocker arm (65) is slidably connected to the limit shaft (67); and the limit shaft (67) is fixedly arranged on the feeding shell.

6. The method for preparing biomass pellet fuel according to claim 5, characterized in that: A guide block is provided at one end of the scraper (64) away from the swing rod (65), and the guide block is slidably connected to a guide groove provided on the feeding housing.

7. A biomass pellet fuel and preparation method according to claim 6, characterized in that: The conveyor (2) comprises a conveyor belt (22) and a conveyor drive member, wherein the output end of the conveyor drive member is fixedly connected to a conveyor roller, and the conveyor belt (22) is sleeved on the conveyor roller, wherein baffles (23) are provided on both sides of the conveyor belt (22) along the conveying direction of the conveyor belt (22).

8. The method for preparing biomass pellet fuel according to claim 7, characterized in that: The input end of the dryer (3) is provided with a material guide plate, which is arranged at an angle, and one end of the material guide plate close to the conveyor belt (22) is in contact with the surface of the conveyor belt (22).

9. The method for preparing biomass pellet fuel according to claim 8, characterized in that: A discharge pipe (12) is provided at the discharge end of the pulverizer (1), and an inclined surface is provided at one end of the discharge pipe (12) adjacent to the conveyor belt (22).

10. A biomass pellet fuel, characterized in that: The biomass pellet fuel is prepared using the biomass pellet fuel preparation method as described in any one of claims 1 to 9.

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