A reed biomass pretreatment method and industrial application of related products

Abstract

The present invention relates to the technical field of grass plant processing, and discloses a reed biomass pretreatment method and the industrial application of related products. The reed is a mixture of one or more southern reeds and reeds, with the reed stems used as the primary raw material. The primary raw material is obtained by cutting, the secondary raw material is obtained by removing impurities, the tertiary raw material is obtained by separating the stems and leaves, the fourth raw material is obtained by removing the pith, and the fifth raw material is obtained by grinding. The impurity content and moisture content of the obtained first to fifth grade raw materials decrease with each grade, and the value gradually increases with the increase of the raw material grade. The first to fifth grade raw materials are widely used in various applications, thereby significantly improving the utilization rate of the reed.

Description

Technical Field

[0001] The present invention relates to the technical field of biomass raw material pretreatment, and in particular to a pretreatment method of reed biomass raw material and industrial application of related products. Background Art

[0002] Wetlands broadly refer to lowlands temporarily or permanently covered by water up to a depth of two meters, meadows with highly water-saturated soil, and coastal areas with a water depth of no more than six meters at low tide. These areas include various saltwater and freshwater marshes, wet meadows, lakes, rivers, floodplains, estuary deltas, peatlands, lake and sea flats, riverside depressions or floodplains, and wet grasslands. According to statistics, China's wetlands cover approximately 56.35 million hectares, accounting for 4% of the global wetland area. Wetlands are rich in plant species and play an important role in regulating climate, conserving soil and water, purifying water quality, and providing ecological services.

[0003] Southern reed and Phragmites australis are two dominant species common in wetlands. Collectively, they are tall grasses that provide high-quality cellulosic biomass feedstock. Southern reed and Phragmites australis are highly similar in appearance: they typically reach 4-7 meters tall, with well-developed rhizomes and scattered, upright, aboveground stems. The top third is heavily branched, and the base two-thirds are deciduous. Their leaves are needle-shaped, with distinct main veins in southern reed and none in Phragmites australis. Southern reed and Phragmites australis share a highly consistent phenological cycle: they sprout in February, reach a height of approximately 4 meters in June, bloom in September for about a month, and begin to wither and turn in November. After naturally withering, the aboveground stems and leaves of southern reed and Phragmites australis have a moisture content of less than 20%, making them suitable for mechanized harvesting, baling, and transportation. Reed aconite populations are characterized by rapid growth, high yield, perenniality, pest and disease resistance, and ease of harvesting and reproduction. Furthermore, their biomass is of high quality, primarily composed of three major components: cellulose, hemicellulose, and lignin, with the combined content reaching up to 90%, and containing only minimal ash. This biomass is not only a high-quality raw material for papermaking but also an excellent bio-based feedstock for the production of a variety of high-value-added products, including xylooligosaccharides, nanocellulose, hard carbon anodes, bioplastics, and bioresins.

[0004] Currently, the main method for harvesting reeds is mechanized harvesting and baling. While this method is fast and efficient, the harvested reed straw contains a large amount of lake sediment and other impurities. Direct use in high-value-added product lines such as processing and biorefining will inevitably affect product cleanliness and quality safety. For example, xylo-oligosaccharides derived from southern reeds are functional substances (prebiotics) used as food additives for humans and animal feed, and their cleanliness and safety requirements are extremely high. Southern reeds, which grow in wetlands and are subject to the influence of rising and falling water levels, often have a lot of sediment at the base of their stems, necessitating cleaning. Furthermore, the three major components of southern reed biomass, cellulose, hemicellulose, and lignin, are primarily derived from the stems, while their concentrations in the inflorescences and leaves are relatively low. Therefore, whether the stems and leaves of southern reeds can be separated during pretreatment and whether the sediment and dirt adhering to the base of the reeds during harvesting can be effectively removed are critical steps in determining the quality of the biomass.

[0005] An existing patent in China with application number 202110123236.4 discloses an environmentally friendly textile color paste preparation process, and discloses a preliminary treatment process for pulping, including removing impurities, cleaning, crushing, grinding, and stirring wheat straw, rice straw, pine wood, waste paper, reeds, or bamboo. However, the entire process only needs to meet the industrial needs of pulping, and the moisture content and impurity content of the obtained raw materials cannot meet the requirements of more refined production raw materials. Summary of the Invention

[0006] In view of the fact that the existing technology is lacking in the treatment technology for wetland grasses such as southern reed and the treatment effect of the existing technology is unsatisfactory, the present invention provides a pretreatment method for improving the utilization rate of southern reed, and the one to five grade raw materials produced can meet the needs of various industrial applications. The present invention also provides a product produced by the pretreatment method for improving the utilization rate of southern reed, which can meet the needs of various industrial applications.

[0007] The present invention is achieved by the following technical solutions:

[0008] A pretreatment method for improving the utilization rate of reed, wherein the reed is a mixture of one or more of southern reed and reed, and the reed stems are used as primary raw materials, and are cut to obtain primary raw materials, impurities are removed to obtain secondary raw materials, stems and leaves are separated to obtain tertiary raw materials, silk and pith are removed to obtain fourth raw materials, and fifth raw materials are ground; the primary raw materials have an impurity content of less than or equal to 15% and a water content of less than or equal to 22%, the first raw materials have an impurity content of less than or equal to 10% and a water content of less than or equal to 18%, the second raw materials have an impurity content of less than or equal to 7% and a water content of less than or equal to 18%, the tertiary raw materials have an impurity content of less than or equal to 5% and a water content of less than or equal to 14%, the fourth raw materials have an impurity content of less than or equal to 3% and a water content of less than or equal to 10%, and the fifth raw materials have an impurity content of less than or equal to 1% and a water content of less than or equal to 6%.

[0009] Preferably, the method comprises the following steps:

[0010] (1) Cutting: The primary raw materials transported back after harvesting and packaging are unpacked and dispersed, and then delivered to a cutting room, where they are mechanically cut into segments of similar size to obtain the primary raw materials;

[0011] (2) Separation: The primary raw material is transferred to a purification chamber, where the soil is centrifuged to obtain the secondary raw material;

[0012] (3) Screening: The secondary raw materials are again transferred to the stem-leaf separation chamber, which has a built-in hammer crushing device and a cyclone separator. The secondary raw materials are separated and collected by the cyclone separator to obtain the tertiary raw materials.

[0013] (4) Silk-softening: After being recovered, the tertiary raw materials are transferred to a silk-softening chamber, which is equipped with a kneading mechanism and a flattening and extruding mechanism. The tertiary raw materials are repeatedly kneaded to obtain the quaternary raw materials.

[0014] (5) Grinding: The fourth-grade raw materials are recovered and conveyed to a grinding chamber, which is equipped with a grinder and a screen. The ground powder is passed through the screen to obtain the fifth-grade raw materials.

[0015] Preferably, the structure of the cutting chamber includes a feed port 1, a conveying device, upper and lower feeding rollers arranged vertically, a fixed knife, a chopping drum and a motor for controlling the chopping drum, a discharge port 1, and a frame along the primary raw material conveying path.

[0016] Preferably, the structure of the purification chamber includes a second feed port, a material climbing machine, a second discharge port, and a material collection tank in sequence along the primary raw material conveying path. An engine is provided below the material climbing machine and is connected to an air outlet.

[0017] Preferably, the structure of the separation chamber includes, from top to bottom along the secondary raw material conveying path, a feed port three and a return air port connected to one side of the feed port three, a feed insert plate, and a hammer head. A pulley is provided at one end of the hammer head, and a material blocking rod is provided at the other end. A fan blade is provided on the side of the material blocking rod away from the hammer head, and a fan casing is provided outside the fan blade. An inner lining, a casing, and a frame are provided below the hammer head from top to bottom.

[0018] Preferably, the structure of the silk-softening chamber includes a feeding mechanism, the end of the feeding mechanism is connected to a flattening and extruding mechanism, the end of the flattening and extruding mechanism away from the feeding mechanism is connected to a kneading mechanism, the flattening and extruding mechanism and the kneading mechanism are connected below with a power and transmission system, and also includes a frame that serves as a supporting connection.

[0019] Preferably, the structure of the grinding chamber includes a baffle, a filter device, a grinding trough, a discharge cover and a discharge pipe in sequence from top to bottom along the four-stage raw material conveying path; the filter device includes a filter screen and a filter plate; the grinding equipment also includes a grinding power device, which includes, from top to bottom, a vibrator passing through the middle of the grinding trough and the filter device, a motor is provided below the vibrator, a cooling fan and a shock-absorbing spring are provided below the motor, and the grinding power device is stabilized in relative position by fixing bolts and a frame.

[0020] An application of a primary raw material prepared according to the above-mentioned combined processing method for improving the utilization rate of reed in direct fuel.

[0021] An application of secondary raw materials prepared according to the above-mentioned combined treatment method for improving the utilization rate of reeds in papermaking raw materials.

[0022] An application of tertiary raw materials prepared according to the above-mentioned pretreatment method for improving the utilization rate of reed in compressed particle raw materials.

[0023] An application of a quaternary raw material prepared according to the above-mentioned pretreatment method for improving the utilization rate of reed wormwood in biorefining raw materials.

[0024] An application of a fifth-grade raw material prepared according to the above-mentioned pretreatment method for improving the utilization rate of reed in biodegradable plastic products.

[0025] Beneficial effects of the present invention:

[0026] (1) The multi-stage treatment scheme of the present invention reduces the moisture content and impurity content in each stage. The value of the raw materials of grades 1 to 5 obtained gradually increases with the increase of the raw material grade. It can be directly applied in various industrial fields, and the utilization rate is significantly improved.

[0027] (2) The present invention uses professional processing equipment at all levels of processing, which can effectively solve the problem of large amount of sticky ash soil and high viscosity after mechanical harvesting of reeds, and has high cutting and grinding efficiency.

[0028] (3) The products obtained from each level of processing in the present invention have different utilization paths. The reeds and the mixed ash are fully separated, the grass raw materials are fully utilized, the raw materials are not easily wasted, and the utilization value of the raw materials is maximized. The cleaning and impurity removal steps are eliminated, and the energy consumption, water consumption and labor costs are greatly reduced.

[0029] (4) The multi-stage treatment scheme of the present invention has high efficiency, high product value and wide application range, which is conducive to industrial promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a process flow chart.

[0031] Figure 2 These are morphological diagrams of raw materials of different grades; A: primary raw material; B: primary raw material; C: secondary raw material; D: tertiary raw material; E: quaternary raw material; F: fifth raw material (20 mesh); G: fifth raw material (60 mesh); H: fifth raw material (100 mesh).

[0032] Figure 3 Comparative bar chart for the characterization of different grades of raw materials.

[0033] Figure 4 The bar chart shows the chemical composition comparison of different grades of raw materials.

[0034] Figure 5 Schematic diagram of the cutting chamber structure.

[0035] Figure 6 Schematic diagram of the clean room structure.

[0036] Figure 7 Schematic diagram of the separation chamber structure.

[0037] Figure 8 Schematic diagram of the silk chamber structure.

[0038] Figure 9 Schematic diagram of the grinding chamber structure.

[0039] 5.1-Conveying device; 5.2-Upper feeding roller; 5.3-Chopping drum; 5.4-Motor; 5.5-Fixed blade; 5.6-Frame; 5.7-Lower feeding roller; 5.8-Discharge port 1; 5.9-Inlet port 1;

[0040] 6.1-Feed port 2; 6.2-Discharge port 2; 6.3-Material; 6.4-Engine; 6.5-Air outlet; 6.6-Material collection tank; 6.7-Material climbing machine;

[0041] 7.1-Pulley; 7.2-Hammer; 7.3-Feed plate; 7.4-Block bar; 7.5-Blower blade; 7.6-Frame; 7.7-Bearing seat; 7.8-Feed port 3; 7.9-Return air port; 7.10-Fan housing; 7.11-Inner lining; 7.12-Casing;

[0042] 8.1-Feeding mechanism; 8.2-Power and transmission system; 8.3-Kneading mechanism; 8.4-Flattening and extruding mechanism; 8.5-Frame;

[0043] 9.1-Baffle; 9.2-Vibrator; 9.3-Discharge cover; 9.4-Filter plate; 9.5-Grinding trough; 9.6-Discharge pipe; 9.7-Shock-absorbing spring; 9.8-Motor; 9.9-Fixing bolt; 9.10-Cooling fan; 9.11-Frame; 9.12-Filter. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention; in the embodiments, unless otherwise specified, the means used are conventional means in the art; the terms "comprising", "including" or any other variations thereof used herein are intended to cover non-exclusive inclusions; for example, a composition, step, method, product or apparatus comprising the listed elements is not necessarily limited to those elements, but may include other elements not explicitly listed or elements inherent to such a composition, step, method, product or apparatus; in addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other; the experimental raw materials used in the embodiments of the present invention and the comparative examples are all commercially available products.

[0045] Example 1:

[0046] A pretreatment method for improving the utilization rate of reed sedge, comprising the following steps:

[0047] Step (1) feeding the loose-packed Nandi straw to a feeder, and conveying the Nandi straw to a cutting chamber along a conveyor belt for mechanical cutting, and uniformly cutting the Nandi straw into small fragments with an average size of about 10 cm;

[0048] After the cutting is completed in step (2), the small fragments of raw materials are automatically transferred to a purification chamber, and impurities such as mud, broken soil blocks and humus on the ground in the lake area are removed in the purification chamber;

[0049] Step (3) The raw materials that have been purified in the purification chamber are again transferred to the separation chamber for further crushing and stem and leaf separation. At this time, the average size of the raw materials is about 5 mm, and the leaves, inflorescences and other relatively light and easy-to-fall parts on the southern reed stems are separated;

[0050] Step (4) the raw materials from the separation chamber are transferred to the silk-softening chamber for mechanical kneading, and the pith on the inner wall and the leaf sheath at the junction of the leaf blade and the stem node are removed by mechanical force;

[0051] Step (5) The raw materials coming out of the silk-softening chamber are finally transferred to the grinding chamber and ground into powder by a ball mill. The particle size of the powder is adjustable. According to user needs, the particle size of the output particles is generally 20-100 mesh. In this example, a 20-mesh sieve is selected. After measurement, the particle size of the Nandi refined powder is between 0.5-0.8 mm.

[0052] Example 2:

[0053] A pretreatment method for improving the utilization rate of reed sedge, comprising the following steps:

[0054] Step (1) feeding the bulk reed straw to a feeder and conveying the reed straw to a cutting chamber along a conveyor belt for mechanical cutting, and uniformly cutting the reed straw into small segments with an average size of about 10 cm;

[0055] After the cutting is completed in step (2), the small fragments of raw materials are automatically transferred to a purification chamber, and impurities such as mud, broken soil blocks and humus on the ground in the lake area are removed in the purification chamber;

[0056] Step (3) The raw materials purified in the purification chamber are transferred to the separation chamber again for further crushing and stem and leaf separation. At this time, the average size of the raw materials is about 5 mm, and the relatively light and easy-to-fall parts such as leaves and inflorescences on the reed stems are separated;

[0057] Step (4) the raw materials from the separation chamber are transferred to the silk-softening chamber for mechanical kneading, and the pith on the inner wall and the leaf sheath at the junction of the leaf blade and the stem node are removed by mechanical force;

[0058] Step (5) The raw materials coming out of the silk-softening chamber are finally transferred to the grinding chamber and ground into powder by a ball mill. The particle size of the powder is adjustable. According to user needs, the particle size of the output particles is generally 20-100 mesh. In this example, a 40-mesh sieve is selected. After measurement, the particle size of the reed powder is between 0.4-0.5 mm.

[0059] Comparative Example 1:

[0060] A pretreatment method for reed stems comprises the following steps:

[0061] Step (1) feeding the loose-packed Nandi straw to a feeder, and conveying the Nandi straw to a cutting chamber along a conveyor belt for mechanical cutting, and uniformly cutting the Nandi straw into small fragments with an average size of about 10 cm;

[0062] Step (2): without separating the impurities, the material is directly put into the crushing chamber for crushing. At this time, the main product at the discharge port is 5mm particles, accounting for about 85%, and the other 15% is soil, leaves and other particulate impurities;

[0063] Step (3): The Nandi straw granular mixture (material + impurities) is ground into powder by a grinder and passed through a 20-mesh sieve. The sieve material and the sieve medium both contain a certain proportion of impurities and cannot be distinguished. As a result, the purity of the Nandi straw material is affected and the quality of the back-end product is unqualified.

[0064] Table 1: Comparison of characterization of different grades of raw materials (Example 1)

[0065]

[0066] Table 2: Chemical composition analysis of different grades of raw materials (Example 1)

[0067]

[0068] Table 3.1 Comparative analysis of Example 1 and Comparative Example 1

[0069]

[0070] Table 3.2 Comparative Analysis of Example 2 and Comparative Example 1

[0071]

[0072] Note: Letters represent the comparison between the example and the comparative example of the same chemical composition. The same letters indicate no significant difference (p>0.05), and different letters indicate a significant difference between the two (p<0.05).

[0073] Table 1 and Figure 3 It can be seen that different types of raw materials exhibit significant variations in impurity content, moisture content, and particle size. In principle, the lower the impurity content and moisture content, the better. Moisture content, in particular, is directly related to the quality and shelf life of the raw material. The particle size can be adjusted based on the intended use by simply replacing the screen as needed. Production lines using reed reed have different processes and utilize different parts of the reed, resulting in different raw material requirements. Figure 1 The process shown is to transform reed from primary raw material to grade 5 raw material, with its particle size gradually reduced and its quality gradually improved. Figure 2 The morphology from primary to grade 5 raw materials is also shown.

[0074] Chemical composition represents the quality and application of biomass. Generally speaking, the content of cellulose, hemicellulose and lignin should be as high as possible, while the ash content should be as low as possible. Figure 4 It can be seen that the chemical composition of raw materials of different grades varies significantly, and the higher the grade of the raw material, the higher the content of the three major elements and the lower the ash content. This shows that through graded utilization, from primary raw material to fifth-grade raw material, the utilization value of reed is gradually increasing as the raw material grade increases.

[0075] It can be seen from Table 3.1 and Table 3.2 that, when comparing the comparative example 1 with the different treatment methods and Example 1, the cellulose, hemicellulose and lignin of the primary raw material to the fifth-grade raw material of Example 1 increase significantly with the increase of the treatment level, while the ash content decreases significantly with the increase of the treatment level. The increase in cellulose, hemicellulose and lignin of the primary raw material to the fifth-grade raw material of Comparative Example 1 is significantly slower than that of Example 1, and the degree of decrease in ash content is also much smaller than that of Example 1. It can be seen that the multi-stage treatment method of the present invention is significantly better than that of Comparative Example 1 in terms of the effect of refined raw materials.

[0076] like Figure 5As shown, the primary material undergoes primary processing and passes through the cutting chamber feed port 5.9, the conveying device 5.1, the upper feeding roller 5.2 and the lower feeding roller 5.7 arranged vertically, the fixed knife 5.5, the chopping drum 5.3 and the motor 5.4 for controlling the chopping drum 5.3, the discharge port 5.8, and the frame 5.6 to obtain the primary raw material.

[0077] like Figure 6 As shown, the primary raw materials undergo secondary processing, passing through the second feed port 6.1 of the purification chamber, the material climbing machine 6.7, and the second discharge port 6.2 in sequence. The engine 6.4 drives the air flow to blow out from the air outlet 6.5 and enter the material collection tank 6.6 together with the material to obtain the secondary raw materials.

[0078] like Figure 7 As shown, the secondary raw materials undergo tertiary processing, pass through the separation chamber feed port 3 7.8 in sequence, and are crushed at the hammer head 7.2 position. The pulley 7.1 rotates to drive the hammer head 7.2 and the fan blade 7.5 to operate. After the crushing time is sufficient, the tertiary raw materials are obtained.

[0079] like Figure 8 As shown, the third-grade raw materials undergo fourth-grade processing and are sequentially transferred through the feeding mechanism 8.1 of the yarn-spinning chamber to the kneading mechanism 8.3 and the flattening and extruding mechanism 8.4. The power and transmission system 8.2 promotes the yarn-spinning process to obtain fourth-grade raw materials.

[0080] like Figure 9 As shown, the fourth-grade raw material undergoes five-stage processing, passing through the baffle 9.1 of the grinding chamber, the filter device, the grinding tank 9.5, the discharge cover and the discharge pipe 9.6 in sequence. The motor 9.8 controls the vibrator 9.2, and the heat is dissipated by the cooling fan 9.10 and the vibration is reduced by the shock-absorbing spring 9.7 to complete the grinding and obtain the fifth-grade raw material.

[0081] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The various technical features of the embodiments described above may be combined arbitrarily. To simplify the description, not all possible combinations of the various technical features in the embodiments described above are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A pretreatment method for improving the utilization rate of reed, characterized in that: The reed is a mixture of one or more of southern reed and reed. The reed stems are used as primary raw materials, and the primary raw materials are obtained by cutting, the secondary raw materials are obtained by removing impurities, the tertiary raw materials are obtained by separating the stems and leaves, the quaternary raw materials are obtained by removing the pith, and the fifth raw materials are obtained by grinding. The primary raw materials have an impurity content of less than or equal to 15% and a water content of less than or equal to 22%. The primary raw materials have an impurity content of less than or equal to 10% and a water content of less than or equal to 18%. The secondary raw materials have an impurity content of less than or equal to 7% and a water content of less than or equal to 18%. The tertiary raw materials have an impurity content of less than or equal to 5% and a water content of less than or equal to 14%. The quaternary raw materials have an impurity content of less than or equal to 3% and a water content of less than or equal to 10%. The fifth raw materials have an impurity content of less than or equal to 1% and a water content of less than or equal to 6%.

2. A pretreatment method for improving the utilization rate of reed according to claim 1, characterized in that: The following steps are involved: (1) Cutting: The primary raw materials transported back after harvesting and packaging are unpacked and dispersed, and then delivered to a cutting room, where they are mechanically cut into segments of similar size to obtain the primary raw materials; (2) Separation: The primary raw material is transferred to a purification chamber, where the soil is centrifuged to obtain the secondary raw material; (3) Screening: The secondary raw materials are again transferred to the stem and leaf separation chamber, which has a built-in hammer crushing device and a cyclone separator. The secondary raw materials are separated and collected by the cyclone separator to obtain the tertiary raw materials; (4) Silk-weaving: After the tertiary raw materials are recovered, they are transferred to a silk-weaving chamber, which has a built-in kneading mechanism and a flattening and extruding mechanism. The tertiary raw materials are repeatedly kneaded to obtain the quaternary raw materials. (5) Grinding: The fourth-grade raw materials are recovered and conveyed to a grinding chamber, which is equipped with a grinder and a screen. The ground powder is passed through the screen to obtain the fifth-grade raw materials.

3. A pretreatment method for improving the utilization rate of reed according to claim 2, characterized in that: The structure of the cutting chamber includes a feed port 1, a conveying device, upper and lower feeding rollers arranged vertically, a fixed knife, a chopping drum and a motor for controlling the chopping drum, a discharge port 1, and a frame along the primary raw material conveying path.

4. A pretreatment method for improving the utilization rate of reed according to claim 2, characterized in that: The structure of the purification chamber includes a second feed port, a material climbing machine, a second discharge port, and a material collecting tank in sequence along the primary raw material conveying path. An engine is provided below the material climbing machine and is connected to an air outlet.

5. A pretreatment method for improving the utilization rate of reed according to claim 2, characterized in that: The structure of the separation chamber includes, from top to bottom along the secondary raw material conveying path, a feed port three and a return air port connected to one side of the feed port three, a feed insert plate, and a hammer head. A pulley is provided at one end of the hammer head, and a material blocking rod is provided at the other end. A fan blade is provided on the side of the material blocking rod away from the hammer head, and a fan casing is provided outside the fan blade. An inner lining, a casing, and a frame are provided below the hammer head from top to bottom.

6. A pretreatment method for improving the utilization rate of reed according to claim 2, characterized in that: The structure of the silk-softening chamber includes a feeding mechanism, the end of the feeding mechanism is connected to a flattening and extruding mechanism, the end of the flattening and extruding mechanism away from the feeding mechanism is connected to a kneading mechanism, and a power and transmission system is connected below the flattening and extruding mechanism and the kneading mechanism, and also includes a frame that serves as a supporting connection.

7. A pretreatment method for improving the utilization rate of reed according to claim 2, characterized in that: The structure of the grinding chamber includes a baffle, a filter device, a grinding trough, a discharge cover and a discharge pipe from top to bottom along the four-level raw material conveying path; the filter device includes a filter screen and a filter plate; the grinding chamber also includes a grinding power device, which includes, from top to bottom, a vibrator passing through the middle of the grinding trough and the filter device, a motor is provided below the vibrator, a cooling fan and a shock-absorbing spring are provided below the motor, and the grinding power device is stabilized in relative position by fixing bolts and a frame.

8. Industrial use of the first to fifth grade raw materials prepared by the pretreatment method for improving the utilization rate of reed sedge according to any one of claims 1 to 7.

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