Biomass pyrolysis gasification raw material pretreatment system

Abstract

The utility model discloses a pretreatment system for biomass pyrolysis gasification raw materials. The pretreatment system comprises a crusher, a cyclone dust collector, an induced draft fan, a first bag-type dust collector, a briquetting machine and a second bag-type dust collector, an upper end interface of the crusher is connected with an inlet of the cyclone dust collector, an outlet of the cyclone dust collector is connected with an inlet of the induced draft fan, and an outlet of the induced draft fan is connected with an inlet of the first bag-type dust collector; a material outlet of the crusher is connected with a material inlet of the briquetting machine, and an upper end connector of the briquetting machine is connected with an inlet of the second bag-type dust collector. The cyclone dust collector and the first bag-type dust collector are adopted to realize dust treatment during biomass crushing, and the second bag-type dust collector is adopted to avoid dissipation of material dust in the briquetting process; the biomass subjected to crushing and briquetting is small in size and large in density, the heat value of the biomass is increased, the subsequent gasification effect and the energy utilization efficiency are further improved, meanwhile, dust pollution is reduced, and workers are prevented from being harmed by dust.

Description

Technical Field

[0001] This utility model relates to the field of biomass fuel pretreatment technology, specifically to a biomass pyrolysis gasification feedstock pretreatment system. Background Technology

[0002] Biomass energy, as a renewable and clean energy source, can be converted into heat and electricity through biomass combustion or gasification. Pretreatment of biomass before gasification is a key factor in improving its pyrolysis and gasification efficiency. Optimizing the calorific value and feed method of biomass through pretreatment processes and methods can effectively promote pyrolysis and gasification, thereby addressing pollution control challenges.

[0003] Currently, common pretreatment processes and equipment (systems) for biomass pyrolysis and gasification mainly include biomass pelleting, biomass co-firing, and biomass briquetting. Different types of biomass raw materials require different pretreatment processes. For example, straw-based biomass has a low calorific value and needs to be co-fired with materials such as coal, requiring additional desulfurization equipment at the downstream end, increasing processing costs. If co-firing is not chosen, straw-based biomass will also generate a large amount of dust-laden gas during the crushing and briquetting process, affecting the health of workers. Utility Model Content

[0004] Therefore, this utility model provides a biomass pyrolysis gasification raw material pretreatment system to improve the calorific value of biomass and avoid the harm to the human body caused by dust-containing gases generated during the pretreatment process.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A biomass pyrolysis gasification feedstock pretreatment system includes a crusher, a cyclone dust collector, an induced draft fan, a first bag filter, a briquetting machine, and a second bag filter. The upper interface of the crusher is connected to the inlet of the cyclone dust collector, the outlet of the cyclone dust collector is connected to the inlet of the induced draft fan, and the outlet of the induced draft fan is connected to the inlet of the first bag filter. The material outlet of the crusher is connected to the material inlet of the briquetting machine, and the upper interface of the briquetting machine is connected to the inlet of the second bag filter.

[0007] Furthermore, the biomass pyrolysis gasification feedstock pretreatment system also includes a feeding belt conveyor, a storage pit, and a feeding belt conveyor; one end of the feeding belt conveyor is connected to the material outlet of the crusher, and the other end is connected to the storage pit; one end of the feeding belt conveyor is connected to the storage pit, and the other end is connected to the material inlet of the briquetting machine.

[0008] Furthermore, the material outlet of the crusher is equipped with a closing device, and baffles are provided on both sides of the belt of the feeding belt conveyor.

[0009] Furthermore, the feeding belt conveyor is an automatic feeding belt conveyor, and baffles are provided on both sides of the belt of the feeding belt conveyor, and a hopper is provided at the material inlet of the briquetting machine.

[0010] Furthermore, the crusher is connected to the cyclone dust collector via a first induced draft dust collection pipe, the cyclone dust collector is connected to the induced draft fan via a second induced draft dust collection pipe, the induced draft fan is connected to the first bag filter dust collector via a third induced draft dust collection pipe, and the briquetting machine is connected to the second bag filter dust collector via a dust collection pipe.

[0011] Furthermore, the storage pit is a sunken pit on the workshop floor, and the crusher, cyclone dust collector, induced draft fan, first bag dust collector, briquetting machine, second bag dust collector, unloading belt conveyor and loading belt conveyor are all installed on the floor of the workshop.

[0012] Furthermore, the length of the biomass after being crushed by the crusher is 3-5cm, and the diameter of the material after being briquetteed by the briquetting machine is 3-5cm and the length is 3-6cm.

[0013] This utility model has the following advantages:

[0014] This invention provides a pretreatment system for biomass pyrolysis gasification feedstock. It employs a cyclone dust collector and a first bag filter to handle dust during biomass crushing, and a second bag filter to prevent dust from escaping during briquetting. Utilizing a storage pit to buffer the crushed material is simple, inexpensive, and avoids the problem of untimely feedstock supply in case of front-end equipment malfunction. After crushing and briquetting, the biomass has a smaller volume and higher density, increasing its calorific value and thus improving subsequent gasification efficiency and energy utilization. Simultaneously, it reduces dust pollution and protects workers from dust hazards.

[0015] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0018] Figure 1 This is a schematic diagram of a biomass pyrolysis gasification feedstock pretreatment system provided in an embodiment of the present invention.

[0019] In the diagram: 1-crusher, 2-cyclone dust collector, 3-induced draft fan, 4-first bag filter, 5-feeding belt conveyor, 6-storage pit, 7-feeding belt conveyor, 8-briquetting machine, 9-second bag filter. Detailed Implementation

[0020] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0021] This embodiment provides a biomass pyrolysis gasification feedstock pretreatment system. Using this system, biomass materials are first crushed, and then the crushed material is briquetted. Dust removal is carried out during the crushing and briquetting process.

[0022] like Figure 1As shown, the biomass pyrolysis gasification feedstock pretreatment system includes a crusher 1, a cyclone dust collector 2, an induced draft fan 3, a first bag filter dust collector 4, a briquetting machine 8, and a second bag filter dust collector 9. The upper interface of the crusher 1 is connected to the inlet of the cyclone dust collector 2, the outlet of the cyclone dust collector 2 is connected to the inlet of the induced draft fan 3, and the outlet of the induced draft fan 3 is connected to the inlet of the first bag filter dust collector 4. The material outlet of the crusher 1 is connected to the material inlet of the briquetting machine 8, and the upper interface of the briquetting machine 8 is connected to the inlet of the second bag filter dust collector 9. Exemplarily, the crusher 1 and the cyclone dust collector 2 are connected through a first induced draft dust collection duct, the cyclone dust collector 2 and the induced draft fan 3 are connected through a second induced draft dust collection duct, the induced draft fan 3 and the first bag filter dust collector 4 are connected through a third induced draft dust collection duct, and the briquetting machine 8 and the second bag filter dust collector 9 are connected through a dust collection duct. Among them, the length of the biomass crushed by crusher 1 is 3-5cm, and the diameter of the briquetted material after briquetting by briquetting machine 8 is 3-5cm and the length is 3-6cm. Among them, the second bag filter is a 9-dimensional small bag filter.

[0023] The biomass pyrolysis gasification feedstock pretreatment system provided by this utility model employs a cyclone dust collector 2 and a first bag filter 4 to handle dust during biomass crushing, and a second bag filter 9 to prevent the release of material dust during briquetting. After crushing and briquetting, the biomass has a smaller volume and a larger density, increasing its calorific value and thus improving subsequent gasification efficiency and energy utilization efficiency. Simultaneously, it reduces dust pollution and prevents workers from being harmed by dust.

[0024] In this embodiment, the biomass pyrolysis gasification feedstock pretreatment system also includes a feeding belt conveyor 5, a storage pit 6, and a feeding belt conveyor 7; one end of the feeding belt conveyor 5 is connected to the material outlet of the crusher 1, and the other end is connected to the storage pit 6; one end of the feeding belt conveyor 7 is connected to the storage pit 6, and the other end is connected to the material inlet of the briquetting machine 8.

[0025] Using the storage pit 6 (sink) to buffer crushed material is a simple and inexpensive method that can also avoid the problem of untimely supply of raw materials when the front-end equipment fails.

[0026] In this embodiment, the material outlet of the crusher 1 is equipped with a closing device, and baffles are provided on both sides of the belt of the feeding belt conveyor 5. The closing device ensures that as much of the crushed material as possible falls onto the belt, preventing it from scattering on the ground; the baffles effectively prevent the crushed material from spilling from the edge of the belt during transport.

[0027] In this embodiment, the feeding belt conveyor 7 is an automatic feeding belt conveyor. Baffles are installed on both sides of the belt of the feeding belt conveyor 7, and a hopper is installed at the material inlet of the briquetting machine 8. The automatic feeding belt conveyor allows for automatic control of material feeding; baffles on both sides of the belt prevent material spillage.

[0028] In this embodiment, the storage pit 6 is a sunken pit on the workshop floor. The crusher 1, cyclone dust collector 2, induced draft fan 3, first bag dust collector 4, briquetting machine 8, second bag dust collector 9, unloading belt conveyor 5, and loading belt conveyor 7 are all installed on the floor within the workshop. The entire system is installed inside the workshop (i.e., not in the open air). The storage pit 6 is a pit dug on the workshop floor (walls or panels can be built at the bottom and around the pit).

[0029] Preprocessing using the above system includes the following steps:

[0030] S1: The crusher 1 crushes the biomass raw materials. The biomass dust generated during the crushing process enters the cyclone dust collector 2 through the first induced draft dust removal pipe for primary dust removal. Then, the dust-laden air after primary dust removal is introduced into the first bag dust collector 4 by the induced draft fan 3 for secondary dust removal.

[0031] S2: The crushed biomass, approximately 3-5cm in length, falls from the material outlet of crusher 1 onto the conveyor belt of feed belt conveyor 5, and is then transported by feed belt conveyor 5 to storage pit 6 for storage. The specifications of storage pit 6 can be set according to the requirements of working time and processing volume.

[0032] S3: The biomass in storage pit 6 is conveyed to briquetting machine 8 via feeding belt conveyor 7 for briquetting. The briquetting material has a diameter of approximately 3-5cm and a length of approximately 3-6cm. This material can be stored at the downstream end or fed directly.

[0033] S4: Dust generated during the briquetting process of the briquetting machine 8 is transported to the second bag filter 9 for treatment via the induced draft dust removal pipeline.

[0034] In the description of this specification, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The foregoing disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0039] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A biomass pyrolysis gasification feedstock pretreatment system, characterized in that, The system includes a crusher (1), a cyclone dust collector (2), an induced draft fan (3), a first bag filter (4), a briquetting machine (8), and a second bag filter (9). The upper interface of the crusher (1) is connected to the inlet of the cyclone dust collector (2), the outlet of the cyclone dust collector (2) is connected to the inlet of the induced draft fan (3), and the outlet of the induced draft fan (3) is connected to the inlet of the first bag filter (4). The material outlet of the crusher (1) is connected to the material inlet of the briquetting machine (8), and the upper interface of the briquetting machine (8) is connected to the inlet of the second bag filter (9).

2. The biomass pyrolysis gasification feedstock pretreatment system according to claim 1, characterized in that, The biomass pyrolysis gasification raw material pretreatment system also includes a feeding belt conveyor (5), a storage pit (6), and a feeding belt conveyor (7); one end of the feeding belt conveyor (5) is connected to the material outlet of the crusher (1), and the other end is connected to the storage pit (6); one end of the feeding belt conveyor (7) is connected to the storage pit (6), and the other end is connected to the material inlet of the briquetting machine (8).

3. The biomass pyrolysis gasification feedstock pretreatment system according to claim 2, characterized in that, The material outlet of the crusher (1) is equipped with a closing device, and the belts of the feeding belt conveyor (5) are equipped with baffles on both sides.

4. The biomass pyrolysis gasification feedstock pretreatment system according to claim 2, characterized in that, The feeding belt conveyor (7) is an automatic feeding belt conveyor. Baffles are provided on both sides of the belt of the feeding belt conveyor (7), and a hopper is provided at the material inlet of the briquetting machine (8).

5. The biomass pyrolysis gasification feedstock pretreatment system according to claim 1, characterized in that, The crusher (1) is connected to the cyclone dust collector (2) through the first induced draft dust removal pipe, the cyclone dust collector (2) is connected to the induced draft fan (3) through the second induced draft dust removal pipe, the induced draft fan (3) is connected to the first bag filter (4) through the third induced draft dust removal pipe, and the briquetting machine (8) is connected to the second bag filter (9) through a dust removal pipe.

6. The biomass pyrolysis gasification feedstock pretreatment system according to claim 2, characterized in that, The storage pit (6) is a sunken pit on the workshop floor. The crusher (1), cyclone dust collector (2), induced draft fan (3), first bag dust collector (4), briquetting machine (8), second bag dust collector (9), feeding belt conveyor (5) and feeding belt conveyor (7) are all located on the ground in the workshop.

7. The biomass pyrolysis gasification feedstock pretreatment system according to claim 1, characterized in that, The length of the biomass after crushing by the crusher (1) is 3-5cm, and the diameter of the material after briquetting by the briquetting machine (8) is 3-5cm and the length is 3-6cm.

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