Device and method for crushing biomass

Abstract

The invention discloses a device and method for smashing biomass. The device comprises feeding equipment, smashing equipment, separating equipment and discharging equipment, and the feeding equipment is used for inputting biomass materials into the smashing equipment; the crushing equipment comprises a plurality of crushers which are connected in series, the biomass material crushed by the previous crusher is re-crushed by the later crusher, and the biomass material crushed by the last crusher enters the separation equipment; the separation equipment outputs the biomass materials meeting the particle size condition to the discharging equipment, and outputs the biomass materials not meeting the particle size condition to the previous crusher, so that cyclic crushing treatment on the biomass materials is realized; and the discharging equipment is used for outputting the crushed biomass powder. By adopting the scheme provided by the embodiment of the invention, a plurality of crushers are connected in series and matched with one another in a circulating crushing manner, so that biomass materials are circularly crushed one by one, and large-scale crushing of biomass is realized.

Description

Technical Field

[0001] The invention relates to the technical field of biomass energy, and in particular to a device and method for crushing biomass. Background Art

[0002] Biomass refers to various organisms formed through photosynthesis. Its main components are various animals, plants and microorganisms. It is the fourth largest energy source after coal, oil and natural gas. Due to its environmental friendliness, it has broad application prospects in the energy, manufacturing, agriculture and environmental protection industries in the future.

[0003] Biomass gasification technology is one of the important application prospects of biomass. This technology refers to the process of pyrolysis, oxidation, reduction and reforming of biomass polymers under certain thermodynamic conditions with the help of air, oxygen and water vapor, and finally converting them into combustible gases such as carbon monoxide, hydrogen and low molecular hydrocarbons. China has a vast territory and a wide distribution of biomass in huge quantities. Biomass gasification can achieve a higher energy utilization rate and provide high-quality energy.

[0004] Before biomass gasification, in order to ensure its full combustion, the biomass materials must be crushed. The higher the crushing fineness, the more complete the degree of gasification and combustion, and the higher the energy utilization rate. For most gasification technologies, the materials need to be crushed to ultra-fineness of 80 mesh or even lower.

[0005] However, biomass (such as rice husks, straw, bamboo, etc.) contains a lot of internal fibers, and ultra-fine crushing is extremely difficult. Currently, the industry mainly uses equipment that relies on shear force to crush them, and the maximum output is only 1 ton per hour. The limited output limits the application of biomass.

[0006] Therefore, there is an urgent need to provide a process that can achieve large-scale ultrafine grinding of biomass. Summary of the invention

[0007] The object of the present invention is to provide a device and method for pulverizing biomass, so as to at least partially solve the above-mentioned problems of the prior art.

[0008] To achieve the above-mentioned purpose, an embodiment of the present invention provides a device for crushing biomass, comprising a feeding device, a crushing device, a separation device and a discharging device, wherein

[0009] The feeding equipment is used to input the biomass materials into the crushing equipment;

[0010] The pulverizing equipment includes a plurality of pulverizers connected in series, wherein the biomass material pulverized by the previous pulverizer is pulverized again by the subsequent pulverizer, and the biomass material pulverized by the last pulverizer enters the separation equipment;

[0011] The separation device outputs the biomass materials that meet the particle size conditions to the discharging device, and outputs the biomass materials that do not meet the particle size conditions to the previous pulverizer, thereby realizing the cyclic pulverization treatment of the biomass materials;

[0012] The discharging equipment is used to output the biomass powder obtained by crushing.

[0013] In a preferred embodiment, the separation device comprises a plurality of separators, each separator corresponds to a group of pulverizers, and each group of pulverizers comprises one or more pulverizers;

[0014] The first group of pulverizers is used to pulverize the biomass materials input by the feeding device, and the first separator is used to output the biomass materials that meet the particle size conditions to the discharging device, and output the biomass materials that do not meet the particle size conditions to the second group of pulverizers; the second group of pulverizers re-pulverizes the input biomass materials and outputs them to the second separator, and the second separator outputs the biomass materials that meet the particle size conditions to the discharging device, and outputs the biomass materials that do not meet the particle size conditions to the next group of pulverizers; the biomass materials pulverized by the last group of pulverizers enter the last separator, and the last separator outputs the biomass materials that meet the particle size conditions to the discharging device, and outputs the biomass materials that do not meet the particle size conditions to the first pulverizer.

[0015] In a preferred embodiment, each group of pulverizers comprises one pulverizer.

[0016] In a preferred embodiment, at least one separator is a cyclone separator, which includes a material inlet, an upper outlet and a lower outlet. The material inlet is used to connect to the outlet of a pulverizer, the upper outlet is used to connect to a discharging device to output biomass materials that meet the particle size requirements to the discharging device, and the lower outlet is used to connect to the inlet of a pulverizer to output biomass materials that do not meet the particle size requirements to the next pulverizer.

[0017] In a preferred embodiment, the cyclone separator comprises a particle size regulating device for regulating the particle size of the biomass material output to the discharging device through the upper outlet.

[0018] In a preferred embodiment, at least one separator is a pipe screen, which includes a three-way structure, which includes an inlet, an outlet and a circulation port. The inlet is used to connect to the outlet of the pulverizer, the outlet is used to connect to the discharging device, the circulation port is used to connect to the inlet of the pulverizer, and a sieve plate is arranged at the outlet, which is used to pass biomass materials that meet the particle size requirements.

[0019] In a preferred embodiment, the biomass material pulverized by the pulverizing disk of at least one pulverizer is directly transported to the outlet.

[0020] In a preferred embodiment, the discharging device includes a bag filter for capturing the pulverized biomass material.

[0021] In a preferred embodiment, the device further comprises a blowing system for introducing gas into the pulverizing device and the discharging device to provide a flow carrier for the biomass material.

[0022] The embodiment of the present invention further provides a method for pulverizing biomass, which is applied to the above-mentioned device for pulverizing biomass, and the method comprises:

[0023] receiving biomass material through a feeding device;

[0024] The biomass material is fed into the pulverizing equipment, and the biomass material is pulverized by multiple pulverizers connected in series;

[0025] Through the separation equipment connected to the pulverizer, the biomass materials meeting the particle size requirements are output to the discharging equipment, and the biomass materials not meeting the particle size requirements are circulated and pulverized between multiple pulverizers;

[0026] The crushed biomass powder is outputted through the discharging equipment.

[0027] Compared with the prior art, the present invention has at least the following advantages:

[0028] By adopting the solution provided in the embodiment of the present invention, multiple crushers are used in series in a cyclic crushing method, the biomass material is cyclically crushed again and again, and the biomass material that meets the particle size requirements is output to the discharging equipment using a separation device, thereby achieving large-scale crushing of biomass. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic structural diagram of a device for crushing biomass provided in an embodiment of the present invention.

[0030] Figure 2 A schematic structural diagram of an example of an apparatus for crushing biomass provided in an embodiment of the present invention.

[0031] Figure 3 A schematic structural diagram of a pulverizer of an apparatus for pulverizing biomass provided in an embodiment of the present invention.

[0032] Figure 4 A schematic flow chart of a method for pulverizing biomass provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to understand the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a product or device containing a series of units is not necessarily limited to those units clearly listed, but may include other units that are not clearly listed or inherent to these products or devices.

[0035] In the present invention, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0036] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0037] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] Example 1

[0040] The embodiment of the present invention provides a device for crushing biomass. Figure 1 The schematic diagram of the structure of the device is shown in FIG. Figure 1 As shown, the device includes a feeding device 1, a crushing device 2, a separation device 3 and a discharging device 4, wherein

[0041] The feeding device 1 is used to input the biomass material into the pulverizing device;

[0042] The pulverizing device 2 includes a plurality of pulverizers (also called grinders) 21 connected in series, wherein the biomass material pulverized by the previous pulverizer is re-pulverized by the subsequent pulverizer, and the biomass material pulverized by the last pulverizer enters the separation device;

[0043] The separation device 3 outputs the biomass materials that meet the particle size conditions to the discharging device, and outputs the biomass materials that do not meet the particle size conditions to the previous pulverizer, thereby realizing the cyclic pulverization treatment of the biomass materials;

[0044] The discharging device 4 is used to output the biomass material.

[0045] The separation device 3 includes a plurality of separators, and each separator corresponds to a pulverizer. Figure 2 FIG. 2 is a schematic diagram showing an example of a device for pulverizing biomass provided by an embodiment of the present invention. Figure 2 As shown, the first crusher 21 is connected to the first separator 31, the first separator 31 outputs the biomass material that meets the particle size condition to the discharging device 4, the first separator 31 outputs the biomass material that does not meet the particle size condition to the second crusher 22, the second crusher is connected to the second separator 32, the second separator 32 outputs the biomass material that meets the particle size condition to the discharging device 4, and the second separator 32 outputs the biomass material that does not meet the particle size condition to the first crusher 21, so as to realize the cyclic crushing treatment of the biomass material. It is easy to understand that the device can have more than three crushers and more than three separators. At this time, the connection relationship of the equipment can refer to Figure 2 Example. In a specific implementation, the last separator outputs the biomass material that does not meet the particle size condition to the first crusher 21 through the screw conveyor 6. It is easy to understand that other conveyors can also be used to replace the screw conveyor, as long as the material can be transported.

[0046] In a preferred embodiment, at least one separator is a cyclone separator. Figure 2As shown, the cyclone separator 3 includes a material inlet, an upper outlet and a lower outlet. The material inlet is used to connect to the outlet of the pulverizer, the upper outlet is used to connect to the discharging device, and output the biomass material that meets the particle size conditions to the discharging device, and the lower outlet is used to connect to the inlet of the pulverizer, and output the biomass material that does not meet the particle size conditions to the next pulverizer.

[0047] The cyclone separator may include a particle size adjustment device for adjusting the particle size of the biomass material output to the discharging device through the upper outlet.

[0048] In a preferred embodiment, at least one separator is a pipe screen, which includes a three-way structure, which includes an inlet, an outlet and a circulation port. The inlet is used to connect to the outlet of the pulverizer, the outlet is used to connect to the discharging device, the circulation port is used to connect to the inlet of the pulverizer, and a sieve plate is provided at the outlet, which is used to pass biomass materials that meet the particle size requirements.

[0049] In a preferred embodiment, reference Figure 2 As shown, the discharging device 4 includes a bag filter (pulse belt separator) for capturing the crushed biomass material. Through the filtering of the bag, the material is captured and discharged from the bottom 42 of the bag filter.

[0050] In a preferred embodiment, reference Figure 1 and Figure 2 As shown, the tail of the bag filter is connected to an induced draft fan 5, which provides carrier gas to the entire device as a flow carrier of the biomass material.

[0051] In a preferred embodiment, the biomass material pulverized by the pulverizing disk of at least one pulverizer is directly transported to the outlet. Figure 3 The schematic diagram of the structure of the pulverizer is shown in FIG. Figure 3 As shown, the pulverizer 21 includes a driving motor 211, a transmission device 212, a pulverizing device 213, a base 214, a material inlet 215 and an outlet 216. The driving motor 211 outputs power to drive the pulverizing device 213 to rotate through the transmission device 212, and the biomass material is driven by the pulverizing device 213 to rotate highly and collide and shear with the gear ring fixed on the shell to achieve crushing. The crushed biomass enters the subsequent process section through the outlet.

[0052] Common crushers include not only Figure 2The driving motor 211, transmission device 212, crushing device 213, base 214, material inlet 215 and outlet 216 shown in the figure also include a classification impeller and a classification motor arranged in front of the outlet 216. The classification impeller can be a group of intermittent grille blades, which rotate at a high speed under the drive of the classification motor. After crushing, biomass with qualified particle size can enter the subsequent process section through the classification impeller, and biomass with unqualified particle size is returned to continue to be crushed in the crushing device 213.

[0053] The original intention of the classification impeller design is to allow qualified particle size materials to pass through the gaps in the classification impeller grid and enter the subsequent process section through high-speed rotation, while unqualified particle size materials are returned. However, in reality, a large part of qualified particle size materials are also returned to the crushing area, causing excessive repeated crushing. Qualified particle size materials are not discharged through the classification wheel in time and still remain inside the crusher body, causing the crusher load to increase and the output to be low.

[0054] By adopting the solution provided in the embodiment of the present invention, multiple crushers are used in series in a cyclic crushing method, the biomass material is cyclically crushed again and again, and the biomass material that meets the particle size requirements is output to the discharging equipment using a separation device, thereby achieving large-scale crushing of biomass.

[0055] The pulverizer provided in the embodiment of the present invention can remove the grading impeller and the grading motor, thereby completely avoiding the repeated crushing phenomenon caused by the presence of the grading impeller in the pulverizer.

[0056] The embodiment of the present invention also proposes the concept of cyclic crushing, using multiple crushers in series, the biomass material is cyclically crushed again and again, and after each crushing, the qualified particle size material is discharged by the separator in time, thereby realizing large-scale crushing of biomass.

[0057] Under actual working conditions, the biomass material is a single cycle from the beginning to the end of the process. If the ratio of the mass of qualified fineness and captured by the cyclone separator to the total mass is defined as the pass rate, then the pass rate of each cycle decreases during repeated crushing. Through experiments, it was found that the initial pass rate was approximately greater than 13.4% and the decline rate was approximately 80%. Through iterative calculations, the material pass rate dropped to 0.02% after the 30th cycle, and 9.99 tons of material remained. Assuming that the average material flow rate is 10 meters per second, the single cycle time is 2 minutes, and the 30 cycle time is 1 hour, the corresponding output of the two devices is 20 tons per hour. Compared with the traditional process flow with an output of 1 ton per hour in the current industry, the present invention has increased the output by 20 times, and this output can fully meet the needs of the biomass gasification process.

[0058] At the same time, since the pulverizer has no grading impeller device, there is no need to set up a separate grading impeller motor, the equipment size and cost are further reduced, and since repeated crushing is avoided, the power of the pulverizer's drive motor is also reduced. Under the same size, the pulverizer without a grading impeller device saves more than 30% energy than the traditional pulverizer.

[0059] Example 2

[0060] The embodiment of the present invention provides a device for crushing biomass, referring to Figure 1 As shown, the device includes a feeding device 1, a crushing device 2, a separation device 3 and a discharging device 4, wherein

[0061] The feeding device 1 is used to input the biomass material into the pulverizing device;

[0062] The pulverizing device 2 includes a plurality of pulverizers 21 connected in series, wherein the biomass material pulverized by the previous pulverizer is re-pulverized by the subsequent pulverizer, and the biomass material pulverized by the last pulverizer enters the separation device;

[0063] The separation device 3 outputs the biomass materials that meet the particle size conditions to the discharging device, and outputs the biomass materials that do not meet the particle size conditions to the previous pulverizer, thereby realizing the cyclic pulverization treatment of the biomass materials;

[0064] The discharging device 4 is used to output the biomass material.

[0065] Different from the device provided in Example 1, the separation device 3 in this embodiment includes multiple separators, each separator corresponds to a group of crushers, and at least one group of crushers includes multiple crushers.

[0066] At this time, the first group of crushers is used to crush the biomass materials input by the feeding device 1, and the first separator is used to output the biomass materials that meet the particle size conditions to the discharging device 4, and output the biomass materials that do not meet the particle size conditions to the second group of crushers; the second group of crushers re-crush the input biomass materials and output them to the second separator, the second separator outputs the biomass materials that meet the particle size conditions to the discharging device 4, and outputs the biomass materials that do not meet the particle size conditions to the next group of crushers; the biomass materials crushed by the last group of crushers enter the last separator, the last separator outputs the biomass materials that meet the particle size conditions to the discharging device 4, and outputs the biomass materials that do not meet the particle size conditions to the first crusher.

[0067] Take the first group of pulverizers including the first and second pulverizers as an example for explanation. The first pulverizer is used to pulverize the biomass material input by the feeding device 1, and the outlet of the first pulverizer is connected to the inlet of the second pulverizer, that is, the material pulverized by the first pulverizer enters the second pulverizer, and the second pulverizer pulverizes the material again, and the outlet of the second pulverizer is connected to the first separator; the first separator outputs the biomass material that meets the particle size condition to the discharging device 4, and outputs the biomass material that does not meet the particle size condition to the second group of pulverizers. Each group of pulverizers pulverizes the biomass material more evenly into smaller particles through continuous pulverization.

[0068] For other technical features in the embodiments of the present invention, reference may be made to the description in Embodiment 1 and will not be repeated here.

[0069] By adopting the device provided in the embodiment of the present invention, multiple crushers are used in series in a cyclic crushing method, the biomass material is cyclically crushed again and again, and the biomass material that meets the particle size requirements is output to the discharging equipment using a separation device, thereby achieving large-scale crushing of biomass.

[0070] In the embodiment of the present invention, the grading impeller and the grading motor can be removed from the pulverizer, completely avoiding the repeated crushing phenomenon caused by the presence of a grading impeller in the pulverizer; through a cyclic crushing method, multiple groups of pulverizers are used in series, the biomass materials are cyclically crushed again and again, and after each crushing, the qualified particle size materials are discharged by the separator in time, thereby realizing large-scale crushing of biomass.

[0071] Example 3

[0072] The embodiment of the present invention provides a device for crushing biomass, referring to Figure 1 As shown, the device includes a feeding device 1, a crushing device 2, a separation device 3 and a discharging device 4, wherein

[0073] The feeding device 1 is used to input the biomass material into the pulverizing device;

[0074] The pulverizing device 2 includes a plurality of pulverizers 21 connected in series, wherein the biomass material pulverized by the previous pulverizer is re-pulverized by the subsequent pulverizer, and the biomass material pulverized by the last pulverizer enters the separation device;

[0075] The separation device 3 outputs the biomass materials that meet the particle size conditions to the discharging device, and outputs the biomass materials that do not meet the particle size conditions to the previous pulverizer, thereby realizing the cyclic pulverization treatment of the biomass materials;

[0076] The discharging device 4 is used to output the biomass material.

[0077] Different from the device provided in Example 1, multiple pulverizers are connected in series in this embodiment, and the outlet of the first pulverizer is connected to the material inlet of the second pulverizer, and the biomass material pulverized by the last pulverizer enters the separation device. The separation device outputs the biomass material that meets the particle size conditions to the discharging device, and outputs the biomass material that does not meet the particle size conditions to the first or other first pulverizers, thereby realizing the cyclic pulverization treatment of the biomass material.

[0078] For other technical features in the embodiments of the present invention, reference may be made to the description in Embodiment 1 and will not be repeated here.

[0079] By adopting the device provided in the embodiment of the present invention, multiple crushers are used in series in a cyclic crushing method, the biomass material is cyclically crushed again and again, and the biomass material that meets the particle size requirements is output to the discharging equipment using a separation device, thereby achieving large-scale crushing of biomass.

[0080] In the embodiment of the present invention, the grading impeller and the grading motor can be removed from the pulverizer, completely avoiding the repeated crushing phenomenon caused by the presence of a grading impeller in the pulverizer; through a cyclic crushing method, multiple pulverizers without grading impellers are used in series, and the biomass materials are cyclically crushed again and again, and finally the qualified particle size materials after crushing are discharged in time by the separator, thereby realizing large-scale crushing of biomass.

[0081] Example 4

[0082] The embodiment of the present invention provides a method for crushing biomass, which is applied to the device for crushing biomass provided in the above embodiment and any implementation manner thereof, such as Figure 4 As shown, the method includes:

[0083] Step 401, receiving biomass material through a feeding device;

[0084] Step 402, the biomass material is input into a pulverizing device, and the biomass material is pulverized by a plurality of pulverizers connected in series;

[0085] Step 403, outputting the biomass material that meets the particle size condition to the discharging device through the separation device connected to the pulverizer, and cyclically pulverizing the biomass material that does not meet the particle size condition between multiple pulverizers;

[0086] Step 404: output the crushed biomass powder through a discharging device.

[0087] When applied to the device corresponding to Example 1, refer to Figure 2As shown, the biomass material enters the first pulverizer under the blowing of carrier gas, and the pulverized material enters the first cyclone separator. In the first cyclone separator, qualified particles are discharged from the top of the separator into the bag-type dust collector, captured by the bag and collected into the downstream unit, and unqualified products are discharged from the bottom of the first cyclone separator and enter the second pulverizer through a rotary discharge valve. The pulverized material enters the second cyclone separator. In the second cyclone separator, qualified particles are discharged from the top of the separator into the bag-type dust collector, captured by the bag and collected into the downstream unit, and unqualified products are discharged from the bottom of the second cyclone separator and enter the first pulverizer through spiral conveying.

[0088] When applied to the device corresponding to Example 2, the biomass material enters the first group of pulverizers under the blowing of carrier gas, and the pulverized material enters the first cyclone separator. In the first cyclone separator, qualified particle sizes are discharged from the top of the separator into the bag-type dust collector, captured by the bag-type dust collector and collected into the downstream unit, and unqualified products are discharged from the bottom of the first cyclone separator and enter the second group of pulverizers through a rotary discharge valve. The pulverized material enters the second cyclone separator. In the second cyclone separator, qualified particle sizes are discharged from the top of the separator into the bag-type dust collector, captured by the bag and collected into the downstream unit, and unqualified products are discharged from the bottom of the second cyclone separator; the biomass material pulverized by the last group of pulverizers enters the last separator, and the last separator outputs the biomass material that meets the particle size conditions to the bag-type dust collector, and outputs the biomass material that does not meet the particle size conditions to the first pulverizer.

[0089] When applied to the device corresponding to Example 3, the biomass material enters the first pulverizer under the blowing of the carrier gas, the pulverized material enters the second pulverizer, the pulverized material enters the third pulverizer, and the material pulverized by the last pulverizer enters the cyclone separator. The cyclone separator outputs the biomass material that meets the particle size conditions to the bag dust collector, and outputs the biomass material that does not meet the particle size conditions to the first pulverizer.

[0090] By adopting the method provided in the embodiment of the present invention, the grading impeller and the grading motor are removed from the pulverizer, thereby completely avoiding the repeated crushing phenomenon caused by the presence of a grading impeller in the pulverizer; through the cyclic crushing method, multiple pulverizers without grading impellers are used in series, the biomass materials are cyclically crushed again and again, and after each crushing, the qualified particle size materials are discharged by the separator in time, thereby realizing large-scale crushing of biomass.

[0091] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Those skilled in the art should understand that the technical solutions described in the above embodiments may be modified, or some of the technical features thereof may be replaced by equivalents; these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for comminuting biomass, characterized in that: It includes feeding equipment, crushing equipment, separation equipment and discharging equipment, among which The feeding equipment is used to input the biomass materials into the crushing equipment; The pulverizing equipment includes a plurality of pulverizers connected in series, wherein the biomass material pulverized by the previous pulverizer is pulverized again by the subsequent pulverizer, and the biomass material pulverized by the last pulverizer enters the separation equipment; The separation device outputs the biomass materials that meet the particle size conditions to the discharging device, and outputs the biomass materials that do not meet the particle size conditions to the previous pulverizer, thereby realizing the cyclic pulverization treatment of the biomass materials; The discharging equipment is used to output the biomass powder obtained by crushing.

2. The device for comminuting biomass according to claim 1, characterized in that: The separation device includes a plurality of separators, each separator corresponds to a group of pulverizers, and each group of pulverizers includes one or more pulverizers; The first group of pulverizers is used to pulverize the biomass materials input by the feeding device, and the first separator is used to output the biomass materials that meet the particle size conditions to the discharging device, and output the biomass materials that do not meet the particle size conditions to the second group of pulverizers; The second group of pulverizers will re-crush the input biomass materials and output them to the second separator. The second separator will output the biomass materials that meet the particle size conditions to the discharging equipment, and will output the biomass materials that do not meet the particle size conditions to the next group of pulverizers. The biomass materials crushed by the last group of pulverizers enter the last separator. The last separator will output the biomass materials that meet the particle size conditions to the discharging equipment, and will output the biomass materials that do not meet the particle size conditions to the first pulverizer.

3. The device for comminuting biomass according to claim 2, characterized in that: Each group of pulverizers includes a pulverizer.

4. The device for comminuting biomass according to any one of claims 1 to 3, characterized in that: At least one separator is a cyclone separator, which includes a material inlet, an upper outlet and a lower outlet. The material inlet is used to connect to the outlet of the pulverizer, the upper outlet is used to connect to the discharging device, and output biomass materials that meet the particle size conditions to the discharging device, and the lower outlet is used to connect to the inlet of the pulverizer, and output biomass materials that do not meet the particle size conditions to the next pulverizer.

5. The device for comminuting biomass according to claim 4, characterized in that: The cyclone separator comprises a particle size regulating device for regulating the particle size of the biomass material output to the discharging device through the upper outlet.

6. The device for comminuting biomass according to any one of claims 1 to 3, characterized in that: At least one separator is a pipe screen, which includes a three-way structure, which includes an inlet, an outlet and a circulation port. The inlet is used to connect to the outlet of the pulverizer, the outlet is used to connect to the discharging equipment, the circulation port is used to connect to the inlet of the pulverizer, and a sieve plate is arranged at the outlet, which is used to pass biomass materials that meet the particle size requirements.

7. The device for comminuting biomass according to any one of claims 1 to 3, characterized in that: The biomass material pulverized by the pulverizing disk of at least one pulverizer is directly transported to the outlet.

8. The device for comminuting biomass according to any one of claims 1 to 3, characterized in that: The discharge equipment includes a bag filter to capture the crushed biomass material.

9. The device for comminuting biomass according to any one of claims 1 to 3, characterized in that: The device also comprises a blowing system, which is used for introducing gas into the pulverizing device and the discharging device to provide a flow carrier for the biomass material.

10. A method for comminuting biomass, applied to the device according to any one of claims 1 to 9, characterized in that: include: receiving biomass material through a feeding device; The biomass material is fed into the pulverizing equipment, and the biomass material is pulverized by multiple pulverizers connected in series; Through the separation equipment connected to the pulverizer, the biomass materials meeting the particle size requirements are output to the discharging equipment, and the biomass materials not meeting the particle size requirements are circulated and pulverized between multiple pulverizers; The crushed biomass powder is outputted through the discharging equipment.

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