Powder making equipment for crushing and grinding biomass

Abstract

The utility model provides pulverizing equipment for crushing and grinding biomass, which comprises a driving device, a shell, a driving disc, a crushing device and a screening device, and is characterized in that the driving device is connected with the driving disc; the driving disc is arranged in the shell, the crushing device comprises a crushing wheel, the crushing wheel is arranged in the shell, and the outer surface of the crushing wheel is in contact with the upper surface of the driving disc; the screening device is arranged above the shell, a blanking pipe is arranged in the screening device, and the driving disc and the crushing wheel are matched to crush and grind materials; an air inlet is formed in the bottom of the shell, and the screening device is provided with a powder outlet. According to the pulverizing equipment, the shearing effect on materials is improved while the grinding mechanism is guaranteed, the grinding and crushing capacity for biomass-related fibrous materials is improved, control over the fineness of material powder is achieved, and the requirement for the fineness of biomass powder under different working conditions is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of biomass energy comprehensive application technology, especially relates to a powder making equipment for biomass crushing and grinding. BACKGROUND

[0002] The carbon emission of biomass is negligible compared with fossil energy, and the global reserves of biomass are rich, only second to coal, oil and natural gas, and the renewable characteristics make it one of the most promising renewable energy in the 21st century. In addition, biomass energy can also be applied to the fields of green methanol and green aviation oil.

[0003] In the field of biomass blending combustion or gasification, the feasibility of biomass powder making is the prerequisite for many process routes, and the energy consumption, output, fineness, reliability and cost of biomass powder making equipment directly affect the development of biomass energy comprehensive utilization technology. On an industrial scale, there is no powder making equipment for biomass materials at present. In the existing test, the crusher is good for biomass powder making, but its production capacity is limited, and it is difficult to meet the output demand of blending combustion and gasification. Although the medium speed mill widely selected for blending combustion and gasification has been verified to be directly used for biomass powder making, the output loss is large and the fineness interval is limited.

[0004] Therefore, an industrial grade powder making equipment that can be applied to biomass crushing is urgently needed. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a powder making equipment for biomass crushing and grinding, which realizes dynamic and accurate control of the fineness of the material powder in the process of biomass powder making and solves the problem of industrial scale biomass fine powder production.

[0006] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a kind of for biomass crushing grinding's powdering equipment, including driving device, shell, driving disc, crushing device and screening device, wherein, the driving device is connected with the driving disc, the driving device can drive the driving disc rotation;The driving disc is arranged in the shell, the crushing device includes crushing wheel, the crushing wheel is arranged in the shell, the outer surface of the crushing wheel is in contact with the upper surface of the driving disc, the rotation of the driving disc can drive the crushing wheel rotation;The screening device is arranged above the shell, the screening device is provided with drop tube, and the material of biomass can be filled to the driving disc by the drop tube, and the driving disc and the crushing wheel cooperate to crush and grind material;The bottom of the shell is provided with air inlet, the screening device is provided with powder outlet, and gas can form ascending airflow in the shell after entering the shell from the air inlet, and powder is formed after material crushing and grinding is driven into the screening device under the driving of ascending airflow, and after the screening of powder through the screening device, the powder with qualified particle size is discharged from the powder outlet.

[0008] Further, in the above-mentioned powdering equipment for biomass crushing grinding, the powdering equipment further comprises a support seat and a transmission support part, the support seat comprises a support plate and support legs, the support plate is connected with the lower end of the shell; The support legs are arranged below the support plate, and a plurality of support legs are provided, and the transmission support part is arranged in the space surrounded by the plurality of support legs; The driving disc comprises a disc body and a disc seat, both the disc body and the disc seat are cylindrical structures, the diameter of the disc body is larger than that of the disc seat, the upper end of the disc seat is connected with the lower end of the disc body, the lower end of the disc seat is connected with the transmission support part after penetrating through the support plate, and the output end of the driving device is connected with the transmission support part.

[0009] Further, in the above-mentioned powdering equipment for biomass crushing grinding, the upper surface of the disc body is provided with a plurality of grooves, the center of the groove is located on the axis of the disc body, and a plurality of grooves are uniformly distributed from the center of the disc body to the edge of the disc body;A plurality of protrusions are uniformly distributed on the outer surface of the crushing wheel in contact with the disc body.

[0010] Further, in the biomass crushing and grinding device, a plurality of material retaining rings are arranged on the disc body, the inner diameter of the material retaining rings is consistent with the inner diameter of the disc body, the plurality of material retaining rings are sequentially arranged from bottom to top on the outer edge of the disc body, the material retaining rings can form a material bed on the driving disc, and the thickness of the material bed on the driving disc can be adjusted by adjusting the number of the material retaining rings; the diameter of the disc body is smaller than the inner diameter of the shell, an air adjusting ring is arranged on the outer side of the disc body, the air adjusting ring is connected with the inner wall of the shell, and the flow rate and flow direction of the gas entering the shell through the air inlet can be adjusted by using the air adjusting ring.

[0011] Further, in the biomass crushing and grinding device, a plurality of material retaining rings are arranged on the disc body, the inner diameter of the material retaining rings is consistent with the inner diameter of the disc body, the plurality of material retaining rings are sequentially arranged from bottom to top on the outer edge of the disc body, the material retaining rings can form a material bed on the driving disc, and the thickness of the material bed on the driving disc can be adjusted by adjusting the number of the material retaining rings; the diameter of the disc body is smaller than the inner diameter of the shell, an air adjusting ring is arranged on the outer side of the disc body, the air adjusting ring is connected with the inner wall of the shell, and the flow rate and flow direction of the gas entering the shell through the air inlet can be adjusted by using the air adjusting ring.

[0012] Further, in the biomass crushing and grinding device, the crushing device further comprises an oil cylinder, a transmission arm and a fixed arm base, the oil cylinder is arranged on the outer wall of the upper portion of the shell, the transmission arm comprises a main arm and a secondary arm, one end of the main arm is connected with one end of the secondary arm, the other end of the secondary arm is hingedly connected with the output end of the oil cylinder, the fixed arm base is arranged on the outer wall of the shell, and one end of the main arm is hingedly connected with the fixed arm base; the crushing wheel is arranged above the driving disc, the crushing wheel is provided with a wheel shaft, one end of the wheel shaft is connected with the crushing wheel, and the other end of the wheel shaft penetrates through the shell and is connected with the other end of the main arm; a plurality of crushing devices are uniformly arranged along the circumference of the shell.

[0013] Further, in the above-mentioned biomass crushing and grinding device, the screening device comprises a motor, a drive shaft, an upper shell and a lower shell, the lower end of the upper shell is connected with the upper end of the lower shell through a connecting plate, the upper shell is a cylindrical structure, and the connecting plate is provided with a through hole; the lower shell comprises an upper section and a lower section, the lower end of the upper section is connected with the upper end of the lower section, the upper section is a cylindrical structure, the lower section is a circular truncated cone structure, the inner diameter of the upper end of the lower section is greater than the inner diameter of the lower end of the lower section, the inner diameter of the upper shell is less than the inner diameter of the upper section, the powder outlet is arranged on the upper shell, the outer diameter of the connecting plate is greater than the outer diameter of the upper section, and the diameter of the through hole is consistent with the inner diameter of the upper shell; the motor is arranged above the upper shell, a rotor is arranged in the upper section of the lower shell, the height of the rotor is consistent with the height of the upper section, the output end of the motor is connected with the rotor through the drive shaft, and the motor drives the rotor to rotate through the drive shaft; a guide stator is arranged on the outer side of the rotor, the upper end of the guide stator is connected with the connecting plate, a plurality of blades are vertically arranged on the guide stator, the plurality of blades are uniformly distributed along the circumference of the lower shell, the blades are detachable and the inclination angle of the blades can be adjusted, the number and inclination angle of the blades are adjusted, and the fineness of the powder entering the inside of the guide stator can be controlled; the inner diameter of the upper shell is less than or equal to the inner diameter of the guide stator; the motor is a variable frequency motor; and the drive shaft is a hollow shaft.

[0014] Further, in the above-mentioned biomass crushing and grinding device, the screening device further comprises a powder returning hopper, the powder returning hopper is arranged directly below the guide stator, the powder returning hopper is a circular truncated cone structure, the diameter of the upper end of the powder returning hopper is greater than the diameter of the lower end of the powder returning hopper, the upper end of the powder returning hopper is connected with the lower shell through a plurality of supporting ribs, the lower end of the powder returning hopper is connected with the upper end of a powder returning pipe, and the lower end of the powder returning pipe extends into the shell; the upper end of the material falling pipe is located above the screening device, the lower end of the material falling pipe extends into the powder returning hopper after penetrating through the drive shaft; after the powder is screened by the screening device, the powder with an unqualified particle size falls back to the driving disc through the powder returning hopper and is crushed and ground again.

[0015] Further, in the above-mentioned biomass crushing and grinding device, the screening device further comprises a wind shielding cover, the wind shielding cover comprises a cover shell and a cover pipe, the upper end of the cover shell is connected with the lower end of the powder returning pipe, the lower end of the cover shell is connected with the upper end of the cover pipe, the lower end of the cover pipe extends into the space surrounded by the crushing wheel and the driving disc, and the outer diameter of the cover pipe is less than the outer diameter of the cover shell.

[0016] Further, in the biomass crushing and grinding pulverizing equipment, the cover pipe comprises a plurality of cover tiles arranged vertically, upper ends of the cover tiles are connected with the cover shell, gaps exist between two adjacent cover tiles, and the plurality of cover tiles enclose the cover pipe; the cover tiles are made of composite wear-resistant steel plates.

[0017] It can be seen that the biomass crushing and grinding pulverizing equipment disclosed by the utility model can realize tooth shape processing on the surface area of the crushing wheel and the driving disc, improve the shearing effect on the material while ensuring the grinding mechanism, and improve the grinding and crushing capacity for biomass related fibrous material. The wind shield can reduce the gap between the plurality of crushing wheels, thereby effectively avoiding the influence of the gas flow field on the biomass raw material during the material feeding process through the material falling pipe. By adjusting the loading force of the oil cylinder in the crushing device, the rotating speed of the rotor of the screening device, and the inclination angle of the blades of the guide stator, the control of the fineness of the material powder is realized, and the fineness requirements of the biomass powder under different working conditions are met. The dynamic and accurate control of the fineness of the material powder during the biomass pulverizing process is realized, and the problem of industrial scale biomass fine powder production is solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings constituting a part of the specification of the application serve to provide a further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof serve to explain the utility model and do not constitute an improper limitation on the utility model. Among them:

[0019] Figure 1 It is a structural schematic view of an embodiment of the utility model.

[0020] Figure 2 It is a three-dimensional structural schematic view of the cooperation of the crushing wheel and the driving disc of an embodiment of the utility model.

[0021] Figure 3 It is a structural schematic view of the crushing device of an embodiment of the utility model.

[0022] Figure 4 It is a structural schematic view of the screening device of an embodiment of the utility model.

[0023] Figure 5 It is a structural schematic view of the wind shield of an embodiment of the utility model.

[0024] Explanation of reference signs: 1 driving device; 2 transmission support part; 3 support seat; 301 slag discharge pipe; 302 support plate; 303 support leg; 4 shell; 5 air adjusting ring; 6 driving disc; 601 disc body; 602 material retaining ring; 603 material scraping plate; 604 disc seat; 605 groove; 7 crushing device; 701 crushing wheel; 702 wheel shaft; 703 protruding tooth; 704 oil cylinder; 705 transmission arm; 7051 main arm; 7052 auxiliary arm; 706 fixed arm seat; 8 screening device; 800 connecting plate; 801 upper shell; 802 lower shell; 8021 upper section; 8022 lower section; 8023 support rib; 803 motor; 804 rotor; 805 powder outlet; 806 guide stator; 807 powder return hopper; 808 powder return pipe; 809 driving shaft; 9 material falling pipe; 10 wind shielding cover; 1001 cover shell; 1002 cover pipe; 11 air inlet. DETAILED DESCRIPTION

[0025] The present application will now be described in detail by way of reference only to the accompanying drawings, in which: Various examples are provided by way of explanation of the application and are not meant as a restriction on the application. For example, features illustrated or described as part of one embodiment, can be used on another embodiment to yield still a further embodiment. It is, therefore, desired that the present application be considered in its broadest aspect and be accorded with full scope of equivalents, while being rendered in such full, clear, concise and exact terms as to enable those skilled in the art to understand completely and thereby practice the present application. The application is described and claimed herein with reference to particular embodiments thereof, which are disclosed in detail below. Those skilled in the art will understand that other embodiments can be practiced and will recognize various changes that can be made to the described embodiments. Those skilled in the art will also appreciate that the application can be practiced without necessarily being limited to any particular hardware or software configuration. It is intended that the scope of the application extend to all alternative combinations of hardware and / or software means contemplated to practice the application. It is intended that the scope of the application encompass all techniques capable of producing the effects described herein. It is intended that the scope of the application encompass all alternatives, modifications and variations of the present application which are or can be made by those skilled in the art without departing from the scope and spirit of the application in its broadest form. It is intended that the scope of the application encompass all alternatives, modifications and variations of the present application which are or can be made by those skilled in the art without departing from the scope and spirit of the application in its broadest form.

[0026] In the description of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like are terms of reference and do not limit the present application to any particular position or orientation. This application can be implemented in any orientation. The terms "connected", "connecting", and "set" should be given a broad interpretation, for example, can be fixedly connected, can be detachably connected, can be directly connected, or indirectly connected through an intermediate part, can be wired electrical connection, wireless electrical connection, or wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0027] One or more examples of the present application are illustrated in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the application. As utilized herein, terms "first", "second", and "third", etc., are used interchangeably to distinguish one element from another and are not intended to signify location or importance of the individual elements.

[0028] As Figures 1 to 5 shown, according to the embodiment of the utility model, provide a kind of for biomass crushing grinding, and the powdering equipment as shown in 1, the powdering equipment includes driving device 1, shell 4, driving disc 6, crushing device 7 and screening device 8, wherein, driving device 1 is connected with driving disc 6, driving device 1 can drive driving disc 6 rotation;Driving disc 6 is arranged in shell 4;Crushing device 7 includes crushing wheel 701, and crushing wheel 701 is arranged in shell 4, the outer surface of crushing wheel 701 is in contact with the upper surface of driving disc 6, and the rotation of driving disc 6 can drive crushing wheel 701 rotation;Screening device 8 is arranged above shell 4, and screening device 8 is provided with drop tube 9, and the material of biomass can be filled to driving disc 6 by drop tube 9, and driving disc 6 and crushing wheel 701 can be cooperated to crush and grind material;The bottom of shell 4 is provided with air inlet 11, and screening device 8 is provided with powder outlet 805, and after gas enters shell 4 by air inlet 11, ascending airflow can be formed in shell 4, and powder is formed after material crushing and grinding is driven into screening device 8 under the driving of ascending airflow, and after powder is screened by screening device 8, powder with qualified particle size is discharged by powder outlet 805.

[0029] Further, the powdering equipment further includes support seat 3 and transmission support part 2, support seat 3 includes support plate 302 and support leg 303, shell 4 is installed on support seat 3, and support plate 302 is connected with the lower end of shell 4;Support leg 303 is arranged below support plate 302, and support leg 303 is provided with a plurality of transmission support parts 2, which are arranged in the space surrounded by a plurality of support legs 303;As Figure 2 shown, driving disc 6 includes disc body 601 and disc seat 604, and disc body 601 and disc seat 604 are both cylindrical structure, and the diameter of disc body 601 is greater than the diameter of disc seat 604, and the upper end of disc seat 604 is connected with the lower end of disc body 601, and the lower end of disc seat 604 is connected with transmission support part 2 after passing through support plate 302, and the output end of driving device 1 is connected with transmission support part 2.Transmission support part 2 is used to support and drive driving disc 6 rotation.

[0030] Further, the upper surface of the disc body 601 is provided with a plurality of grooves 605, the centers of the grooves 605 are located on the axis of the disc body 601, the plurality of grooves 605 are uniformly distributed from the center of the disc body 601 to the edge of the disc body 601, and the depths of the plurality of grooves 605 are consistent; the outer surface of the crushing wheel 701 in contact with the disc body 601 is uniformly distributed with a plurality of teeth 703. By tooth-shaped processing of the surface contact area of the crushing wheel 701 and the driving disc 6 (the grooves 605 provided on the upper surface of the disc body 601 and the teeth 703 provided on the outer surface of the crushing wheel 701), the shearing action on the material and the effective residence time of the material on the driving disc 6 are improved while ensuring the grinding mechanism, effectively crushing the fibrous structure of the biomass, and improving the economy of the grinding equipment on the basis of meeting the biomass industrial grinding demand.

[0031] Further, a plurality of material retaining rings 602 are provided on the disc body 601, the inner diameter of the material retaining ring 602 is consistent with the inner diameter of the disc body 601, the plurality of material retaining rings 602 are sequentially arranged from bottom to top on the outer edge of the disc body 601, the material retaining ring 602 can form a material bed on the driving disc 6, and adjusting the number of the material retaining ring 602 can adjust the thickness of the material bed formed on the driving disc 6; the diameter of the disc body 601 is smaller than the inner diameter of the outer shell 4, the outer side of the disc body 601 is sleeved with an air adjusting ring 5, the air adjusting ring 5 is connected with the inner wall of the outer shell 4, and the flow rate and flow direction of the gas entering the outer shell 4 from the air inlet 11 can be adjusted by using the air adjusting ring 5. By controlling the height of the material retaining ring 602 on the outer side of the driving disc 6 to control the thickness of the biomass material bed, the crushing capacity for biomass-related fibrous materials can be improved.

[0032] Further, a material scraping plate 603 is arranged on the outer wall of the disc seat 604, the bottom of the material scraping plate 603 extends away from the driving disc 6, the material scraping plate 603 is perpendicular to the outer wall of the disc seat 604, the support plate 302 is provided with a slag discharge hole, a slag discharge pipe 301 is arranged below the support plate 302 and connected with the slag discharge hole; the driving disc 6 drives the material scraping plate 603 to rotate, and the material scraping plate 603 can discharge the large pieces of material on the support plate 302 through the slag discharge hole and the slag discharge pipe 301 by rotating.

[0033] Further, as shown in FIG. 6, the driving disc 6 is provided with a plurality of support plates 302, the support plates 302 are arranged on the outer side of the driving disc 6, and the support plates 302 are arranged in a staggered manner. Figure 3As shown, the crushing device 7 further comprises an oil cylinder 704, a transmission arm 705 and a fixed arm base 706, the oil cylinder 704 is arranged on the outer wall of the upper part of the shell 4, the transmission arm 705 comprises a main arm 7051 and a sub-arm 7052, one end of the main arm 7051 is connected with one end of the sub-arm 7052, the other end of the sub-arm 7052 is hinged with the output end of the oil cylinder 704, the fixed arm base 706 is arranged on the outer wall of the shell 4, one end of the main arm 7051 is hinged with the fixed arm base 706; the crushing wheel 701 is arranged above the driving disc 6, the crushing wheel 701 is provided with an axle 702, one end of the axle 702 is connected with the crushing wheel 701, the other end of the axle 702 is connected with the other end of the main arm 7051 after penetrating through the shell 4, the upper end of the crushing wheel 701 is inclined to the center of the shell 4, the axle 702 of the crushing wheel 701 has an angle with the upper surface of the driving disc 6; the crushing device 7 is uniformly arranged with a plurality of crushing wheels 701 along the circumference of the shell 4. The crushing pressure of the crushing wheel 701 can be adjusted by adjusting the output pressure of the oil cylinder 704. Under the driving of the transmission arm 705 controlled by the oil cylinder 704, the crushing wheel 701 can be pressed on the driving disc 6 to grind the material. The friction force generated between the biomass material and the crushing wheel 701 drives the rotation of the crushing wheel 701, so that the action point of the crushing biomass material changes in real time, thereby realizing the continuous and efficient grinding of the biomass material between the driving disc 6 and the crushing wheel 701.

[0034] Further, as Figure 4As shown, the screening device 8 comprises a motor 803, a drive shaft 809, an upper housing 801 and a lower housing 802, the lower end of the upper housing 801 is connected with the upper end of the lower housing 802 through a connecting plate 800, the upper housing 801 is a cylindrical structure, the connecting plate 800 is provided with a through hole, the lower housing 802 comprises an upper section 8021 and a lower section 8022, the lower end of the upper section 8021 is connected with the upper end of the lower section 8022, the upper section 8021 is a cylindrical structure, the lower section 8022 is a circular truncated cone structure, the inner diameter of the upper end of the lower section 8022 is greater than the inner diameter of the lower end of the lower section 8022, the inner diameter of the upper housing 801 is less than the inner diameter of the upper section 8021, the outer diameter of the connecting plate 800 is greater than the outer diameter of the upper section 8021, and the diameter of the through hole is consistent with the inner diameter of the upper housing 801; a powder outlet 805 is arranged on the upper housing 801; the motor 803 is arranged above the upper housing 801, a rotor 804 is arranged in the upper section 8021 of the lower housing 802, the height of the rotor 804 is consistent with the height of the upper section 8021 of the lower housing 802, the output end of the motor 803 is connected with the rotor 804 through the drive shaft 809, and the motor 803 drives the rotor 804 to rotate through the drive shaft 809; a guide stator 806 is arranged on the outer side of the rotor 804, the upper end of the guide stator 806 is connected with the connecting plate 800, and there is a distance between the outer side wall of the guide stator 806 and the inner side wall of the upper housing 801; the guide stator 806 is vertically provided with a plurality of blades, the plurality of blades are uniformly distributed along the circumference of the lower housing 802, the blades are detachable and the inclination angle thereof can be adjusted, the number and the inclination angle of the blades are adjusted, and the fineness of the powder entering the inside of the guide stator 806 can be controlled; the inner diameter of the upper housing 801 is less than or equal to the inner diameter of the guide stator 806; the motor 803 is a variable frequency motor 803, and the drive shaft 809 is a hollow shaft. By adjusting the rotating speed of the rotor 804 through the motor 803 and adjusting the inclination angle and the number of the blades of the guide stator 806, the material conveyed from below the screening device 8 can be screened, and the fineness of the biomass powder is controlled, so that the selected powder fineness of the powder is dynamically and accurately controlled in the biomass powder production process, and the problem of industrial-scale biomass fine powder production is solved.

[0035] Further, the screening device 8 further comprises a powder returning hopper 807, the powder returning hopper 807 is arranged directly below the guide stator 806, the powder returning hopper 807 has a circular table shape, the diameter of the upper end of the powder returning hopper 807 is larger than the diameter of the lower end of the powder returning hopper 807, the upper end of the powder returning hopper 807 is connected with the lower shell 802 through a plurality of supporting ribs 8023, the plurality of supporting ribs 8023 are uniformly distributed along the circumference of the lower shell 802, the lower end of the powder returning hopper 807 is connected with the upper end of a powder returning pipe 808, the lower end of the powder returning pipe 808 extends into the outer shell 4; the upper end of the material falling pipe 9 is located above the screening device 8, the lower end of the material falling pipe 9 extends into the powder returning hopper 807 after passing through a driving shaft 809, the axis of the material falling pipe 9 is collinear with the axis of the driving disc 6; after the powder is screened by the screening device 8, the powder with unqualified particle size falls back to the driving disc 6 through the powder returning hopper 807 to be crushed and ground again.

[0036] Further, the screening device 8 further comprises a wind shield 10, as shown in Figure 5 the wind shield 10 comprises a shield shell 1001 and a shield pipe 1002, the upper end of the shield shell 1001 is connected with the lower end of the powder returning pipe 808, the lower end of the shield shell 1001 is connected with the upper end of the shield pipe 1002, the shield shell 1001 is located above the crushing wheel 701, the lower end of the shield pipe 1002 extends into the space surrounded by the crushing wheel 701 and the driving disc 6, the outer diameter of the shield pipe 1002 is smaller than the outer diameter of the shield shell 1001. The wind shield 10 is connected with the powder returning pipe 808 by welding, the wind shield 10 can reduce the gap between the plurality of crushing wheels 701, thereby effectively avoiding the influence of the gas flow field above the driving disc 6 on the biomass raw material during the material supplementing process of the material falling pipe 9.

[0037] Further, the shield pipe 1002 comprises a plurality of shield tiles, the shield tiles are vertically arranged, the upper end of the shield tile is connected with the shield shell 1001, there is a gap between adjacent two shield tiles, the plurality of shield tiles surround the shield pipe 1002; the material of the shield tile is a composite wear-resistant steel plate.

[0038] The working process of the pulverizing equipment is as follows:

[0039] The driving disc 6 horizontally placed is driven to rotate by the driving device 1 through the transmission support 2, biomass material falls vertically from the falling pipe 9 penetrating the screening device 8, under the protection of the wind shield 10 below the screening device 8, the influence of the internal flow field on the falling of the biomass material can be reduced, and the biomass can be ensured to fall to the center of the driving disc 6. The biomass spreads to the periphery under the centrifugal force generated by the rotation of the driving disc 6, and forms a material layer with a certain thickness under the protection of the material retaining ring 602. The thickness of the biomass material bed formed on the driving disc 6 is controlled by adjusting the number of the material retaining rings 602. The transmission arm 705 is loaded by the oil cylinder 704, so that the transmission arm 705 transmits the loading force to the crushing wheel 701, and the crushing wheel 701 crushes the biomass material under the double pressure of its own gravity and the pressure generated by the transmission arm 705 driven by the oil cylinder 704. At the same time, the friction force generated between the biomass material and the crushing wheel 701 drives the rotation of the crushing wheel 701, so that the action point of the crushed biomass material changes in real time, thereby realizing the continuous and efficient grinding of the biomass material between the driving disc 6 and the crushing wheel 701.

[0040] Under the continuous action of the centrifugal force of the driving disc 6, the powder formed after the material is crushed is mixed into the airflow rising at high speed from the air inlet 11 through the air distribution ring 5 after passing through the material retaining ring 602. The material with smaller particle size is carried into the screening device 8 by the high-speed airflow, and the impurities such as metal and stone with larger density cannot be carried by the airflow and fall onto the support plate 302 and are discharged through the slag discharge pipe 301 by the material scraping plate 603 rotating with the driving disc 6. The screening device 8 is driven by the motor 803, the motor 803 drives the rotor 804 to rotate, and the material conveyed from below is screened by adjusting the rotating speed of the rotor 804 and the inclination angle of the blades of the guide stator 806. The powder return hopper 807 is fixedly connected below the guide stator 806, and the powder return hopper 807 is used for recycling the powder with unqualified particle size screened by the screening device 8 and then falling back to the driving disc 6 for regrinding, and the qualified powder is discharged from the powder outlet 805. During the operation, the rotating speed of the rotor 804 is changed by adjusting the rotating speed of the motor 803 of the screening device 8, so that the powder selection fineness of the material is flexibly controlled.

[0041] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0042] A kind of for biomass crushing grinding's powder equipment, by the tooth shape processing to crushing wheel 701 and the surface area of driving disc 6, while ensuring the grinding mechanism, improve the shearing action to material, promote the grinding crushing capacity for biomass related fibrous material.The wind shield 10 can reduce the gap between multiple crushing wheels 701, thereby effectively avoid the influence of gas flow field during the process of biomass raw material is replenished by drop tube 9.Adjust the loading force of oil cylinder 704 of crushing device 7, the rotating speed of rotor 804 of screening device 8 and the inclination angle of the blade of guide stator 806, realize the control of the fineness of material powder, satisfy the fineness requirement of biomass powder of different working conditions.During the process of biomass powdering, realize the dynamic accurate control of the fineness of material powder, solve the problem of industrial scale biomass fine powder production.

[0043] The above only for the preferred embodiments of the present application, and is not used to limit the present application, for the person skilled in the art, the present application can have various changes and changes.Any modification, equivalent replacement, improvement, etc., within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A powder-making device for crushing and grinding biomass, characterized in that, It includes a drive unit, a housing, a drive disc, a crushing device, and a screening device, among which, The drive device is connected to the drive disk, and the drive device can drive the drive disk to rotate; the drive disk is disposed inside the housing. The crushing device includes a crushing wheel, which is disposed inside the housing. The outer surface of the crushing wheel is in contact with the upper surface of the drive disc, and the rotation of the drive disc can drive the crushing wheel to rotate. The screening device is located above the outer shell. The screening device is equipped with a feeding pipe, through which biomass materials can be fed onto the drive disc. The drive disc and the crushing wheel work together to crush and grind the materials. An air inlet is provided at the bottom of the outer shell, and a powder outlet is provided in the screening device. After the gas enters the outer shell through the air inlet, it can form an upward airflow inside the outer shell. The powder formed after the material is crushed and ground enters the screening device under the drive of the upward airflow. After the powder is screened by the screening device, the powder with qualified particle size is discharged from the powder outlet.

2. The grinding equipment for biomass crushing and grinding according to claim 1, characterized in that, The powder-making equipment also includes a support base and a transmission support unit. The support base includes a support plate and support legs. The support plate is connected to the lower end of the outer shell. The support legs are arranged below the support plate, and there are multiple support legs. The transmission support unit is arranged within the space enclosed by the multiple support legs. The active disc includes a disc body and a disc base, both of which are cylindrical structures. The diameter of the disc body is larger than the diameter of the disc base. The upper end of the disc base is connected to the lower end of the disc body. The lower end of the disc base passes through the support plate and is connected to the transmission support part. The output end of the drive device is connected to the transmission support part.

3. The grinding equipment for biomass crushing and grinding according to claim 2, characterized in that, The upper surface of the disc is provided with several concentric grooves, the center of which is located on the axis of the disc, and the several concentric grooves are evenly distributed from the center of the disc to the edge of the disc. Several protruding teeth are evenly distributed on the outer surface of the crushing wheel that contacts the disc.

4. The grinding equipment for biomass crushing and grinding according to claim 2, characterized in that, The disc body is provided with multiple material retaining rings, the inner diameter of which is the same as the inner diameter of the disc body. The multiple material retaining rings are arranged sequentially from bottom to top on the outer edge of the disc body. The material retaining rings enable the material to form a material bed on the active disc. Adjusting the number of material retaining rings can adjust the thickness of the material bed formed on the active disc. The diameter of the disc is smaller than the inner diameter of the outer shell. An air regulating ring is fitted on the outer side of the disc and is connected to the inner wall of the outer shell. The air regulating ring can be used to regulate the flow rate and direction of the gas entering the outer shell from the air inlet.

5. The grinding equipment for biomass crushing and grinding according to claim 2, characterized in that, A scraper is provided on the outer wall of the disc base. The bottom of the scraper extends away from the active disc. The scraper is perpendicular to the outer wall of the disc base. A slag discharge hole is provided on the support plate. A slag discharge pipe is provided below the support plate and is connected to the slag discharge hole. The active disc drives the scraper to rotate, and the scraper can discharge large pieces of material from the support plate through the slag discharge hole by rotating.

6. The grinding equipment for biomass crushing and grinding according to claim 1, characterized in that, The crushing device also includes a hydraulic cylinder, a transmission arm, and a fixed arm seat. The hydraulic cylinder is disposed on the outer wall of the upper part of the housing. The transmission arm includes a main arm and a secondary arm. One end of the main arm is connected to one end of the secondary arm, and the other end of the secondary arm is hinged to the output end of the hydraulic cylinder. The fixed arm seat is disposed on the outer wall of the housing, and one end of the main arm is hinged to the fixed arm seat. The crushing wheel is positioned above the drive disc, and the crushing wheel is equipped with an axle. One end of the axle is connected to the crushing wheel, and the other end of the axle passes through the outer casing and is connected to the other end of the main arm. Multiple crushing devices are evenly arranged along the circumference of the outer shell.

7. The grinding equipment for biomass crushing and grinding according to claim 1, characterized in that, The screening device includes a motor, a drive shaft, an upper housing, and a lower housing. The lower end of the upper housing is connected to the upper end of the lower housing via a connecting plate. The upper housing has a cylindrical structure, and the connecting plate is provided with through holes. The lower housing includes an upper section and a lower section. The lower end of the upper section is connected to the upper end of the lower section. The upper section is a cylindrical structure, and the lower section is a frustum-shaped structure. The inner diameter of the upper end of the lower section is larger than the inner diameter of the lower end of the lower section. The inner diameter of the upper housing is smaller than the inner diameter of the upper section. The powder outlet is located on the upper housing. The outer diameter of the connecting plate is larger than the outer diameter of the upper section. The diameter of the through hole is the same as the inner diameter of the upper housing. The motor is located above the upper housing, and a rotor is provided in the upper section of the lower housing. The height of the rotor is the same as the height of the upper section. The output end of the motor is connected to the rotor through the drive shaft, and the motor drives the rotor to rotate through the drive shaft. A guide stator is provided on the outer side of the rotor. The upper end of the guide stator is connected to the connecting plate. Several blades are vertically arranged on the guide stator. The blades are evenly distributed along the circumference of the lower housing. The blades are detachable and the tilt angle can be adjusted. By adjusting the number and tilt angle of the blades, the fineness of the powder entering the guide stator can be controlled. The inner diameter of the upper housing is less than or equal to the inner diameter of the guide stator; The motor is a variable frequency motor; The drive shaft is a hollow shaft.

8. The grinding equipment for biomass crushing and grinding according to claim 7, characterized in that, The screening device also includes a powder return hopper, which is located directly below the guide stator. The powder return hopper has a frustum-shaped structure, and the diameter of the upper end of the powder return hopper is larger than the diameter of the lower end of the powder return hopper. The upper end of the powder return hopper is connected to the lower shell through multiple support ribs, and the lower end of the powder return hopper is connected to the upper end of a powder return pipe, the lower end of which extends into the outer shell. The upper end of the discharge pipe is located above the screening device, and the lower end of the discharge pipe extends into the return powder hopper after passing through the drive shaft. After the powder is screened by the screening device, the powder with unqualified particle size falls back to the active disc from the return hopper for re-crushing and grinding.

9. The grinding equipment for biomass crushing and grinding according to claim 8, characterized in that, The screening device also includes a wind shield, which includes a shell and a tube. The upper end of the shell is connected to the lower end of the powder return pipe, and the lower end of the shell is connected to the upper end of the tube. The lower end of the tube extends into the space enclosed by the crushing wheel and the drive disc. The outer diameter of the tube is smaller than the outer diameter of the shell.

10. The grinding equipment for biomass crushing and grinding according to claim 9, characterized in that, The cover tube includes multiple cover tiles, which are arranged vertically. The upper end of each cover tile is connected to the cover shell. There is a gap between two adjacent cover tiles, and the multiple cover tiles form the cover tube. The cover tile is made of composite wear-resistant steel plate.

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