Efficient clean processing technology and system for elymus dahuricus seeds

Abstract

The invention discloses an efficient clean processing technology and system for elymus dahuricus seeds, and particularly relates to the technical field of seed screening and processing.The efficient clean processing technology for the elymus dahuricus seeds comprises the steps of multi-stage winnowing separation, awn removal treatment, air screen cleaning, indent cleaning, specific gravity fine selection, intelligent color selection and automatic packaging; gradient separation of impurities is realized through three-stage winnowing; efficient awn removal is achieved through combination of the multi-edge movable teeth and the multi-edge static teeth; fine seed regeneration is realized by matching specific gravity concentration with a backflow belt conveyor; the impurities are classified into two types with / without utilization value and are respectively recycled. According to the method, high-cleanliness, high-germination-rate, low-loss, recycling and intelligent processing of the elymus dahuricus seeds is achieved through nonlinear cooperation and closed-loop regeneration of the multi-stage working procedures, and the technical problems that in the prior art, burrs are difficult to remove, the sorting precision is low, light impurities are many, the seed breakage rate is high, impurities cannot be classified and recycled, the good seed recycling rate is low, and the automation degree is low are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of seed screening and processing, and particularly relates to a high-efficiency clean processing technology and system for Elymus dahuricus seeds. BACKGROUND

[0002] Elymus dahuricus is a key perennial grass of the Gramineae family for the restoration of degraded grasslands and the construction of artificial grasslands in northern China. The seeds of Elymus dahuricus have the advantages of cold resistance, drought tolerance, and strong adaptability. However, the harvested Elymus dahuricus seeds often carry a large amount of impurities, including stones, soil clumps, chaff fragments, light dust, burrs, immature grains, and foreign crop seeds. The traditional processing technology mainly uses single air separation or specific gravity separation, which has the following problems: 1. Incomplete removal of burrs: Elymus dahuricus seeds have long burrs, which are easy to entangle equipment and block channels, and the traditional technology cannot effectively separate the seeds with burrs; 2. Low separation precision: due to the irregular shape and wide density distribution of the seeds, conventional specific gravity separation and color separation can easily cause misremoval or missed selection; 3. Difficulty in separating light impurities: light impurities such as broken leaves and dust are easy to enter the next stage with the seeds, affecting the purity; 4. High seed damage rate: multi-stage mechanical processing causes damage to the seed embryo, affecting the germination rate; 5. Mixed impurities processing: all impurities are collected together, which cannot realize resource utilization and causes waste; 6. Low recovery rate of good seeds: light but perfect seeds are misremoved in specific gravity separation, and there is no regeneration processing mechanism; 7. Low automation level: the process connection is not smooth, and relies on manual intervention, resulting in low production efficiency.

[0003] After searching, the patent with the patent number CN 213791778 U in the prior art provides a scallion seed cleaning system, which includes a stock bin, a vibrating screen, a stone removing machine, a rice mill, a wind screen cleaner, a specific gravity separator, and a color sorter. The discharge outlet of the vibrating screen is connected to the inlet of the stone removing machine through a bucket elevator. The discharge outlet of the stone removing machine is connected to the inlet of the rice mill through a bucket elevator. The discharge outlet of the rice mill is connected to the inlet of the wind screen cleaner through a bucket elevator. The discharge outlet of the wind screen cleaner is connected to the inlet of the specific gravity separator through a bucket elevator. The discharge outlet of the specific gravity separator is connected to the inlet of the color sorter through a bucket elevator. This structure realizes the integration of the scallion seed processing system, improves the efficiency of seed processing, and can quickly and efficiently process a large number of seeds.

[0004] However, this seed cleaning equipment combines air separation and specific gravity separation for seed cleaning. The air separation is simply based on the characteristics of the mass of seeds and impurities to achieve separation. The specific gravity separation is based on the difference in specific gravity between seeds and other impurities. However, due to the characteristics of the shape of Elymus dahuricus seeds, the problem of interference by the unique burrs of Elymus dahuricus is not considered. This type of technology cannot effectively solve the problem of interference by the unique burrs of Elymus dahuricus seeds, which will have adverse effects on the normal operation of the equipment and the screening effect during the cleaning process. The seed color sorter mainly relies on color recognition technology to remove impurities with color differences. However, for impurities that are highly similar in shape to high-quality seeds, if the air separation process is not thorough and fails to fully separate the awns and dust from the seeds, then in the subsequent gravity separation and color sorting processes, the awns and dust will interfere with the screening accuracy, causing deviations in the distinction between high-quality seeds and inferior seeds or impurities. Color recognition alone is insufficient to achieve effective differentiation, and the color sorter cannot accurately identify and remove such impurities.

[0005] Therefore, simply adding single processes such as multi-stage air separation, gravity sorting, and color sorting cannot overcome the systemic challenges faced in the processing of crested wheatgrass seeds. Moreover, if the equipment lacks a reflux mechanism, that is, if there is no step to recycle and reuse the mistakenly rejected high-quality seeds, a large number of crested wheatgrass seeds that originally met quality standards will be wrongly rejected, resulting in unnecessary losses.

[0006] Therefore, this application proposes an efficient and clean processing technology and system for crested wheatgrass seeds, which is an integrated processing system that can achieve collaborative operation throughout the entire process, intelligent linkage of each process, and resource utilization function, so as to systematically solve various problems existing in the processing of crested wheatgrass seeds. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide an efficient and clean processing technology and system for crested wheatgrass seeds.

[0008] The technical solution adopted to solve the above technical problems is: A highly efficient and clean processing technology for crested wheatgrass seeds includes the following steps: a) Multi-stage air separation: The wheatgrass seeds are fed into an integrated air separation device, which includes an air separation module, a screening module and a gravity table. Large impurities are removed by the upper screen, light and heavy impurities are removed by the air separation module, large and small impurities are removed by the screening module, and light and poor quality seeds are removed by gravity separation of the gravity table. b) Deawn removal: The seeds separated by air separation in step a) are fed into a deawning machine for mechanical deawn removal at a speed of 200–250 rpm; c) Air sieve cleaning: The seeds after the awn removal in step b) are sent to the pre-cleaner and cleaned according to the differences in seed size and quality. d) Hole cleaning: After the seeds have been cleaned by the air sieve in step c), they are sent to the hole cleaning machine to remove short and long weed seeds respectively; e) Gravity selection: After the seeds in step d) hole cleaning are sent to a gravity separator to separate good seeds from light and inferior seeds within a specific gravity threshold range of 1.18-1.22 g / cm³. f) Intelligent color sorting: The seeds after specific gravity selection in step e) are sent to a color sorter, and seeds with abnormal color are removed according to the set color threshold. g) Automatic packaging: The purified seeds after step f) color sorting are weighed and packaged.

[0009] In step a), the airflow velocity in the air separation duct is 5–12 m / s, and the wind speed is adjustable. The spacing between the upper and lower sieve plates of the sieving module is greater than and less than the size of the seed, respectively. The longitudinal and lateral tilt angles of the gravity table are adjustable, and the air volume under the table surface is also adjustable.

[0010] In step b), the awn removal machine includes fixed teeth and moving teeth, and the fixed teeth and moving teeth are multi-prism structures.

[0011] In step e), the separated light and inferior seeds are returned to the front-end process for reprocessing via a gravity return conveyor belt, forming a closed-loop regeneration cycle.

[0012] In step e), the forced feeding agitator cooperates with the frequency converter module to supply material to the gravity separator.

[0013] In step f), the color sorter uses a high-resolution CCD camera and an LED light source for identification, and the set color thresholds are R: 80–120, G: 60–90, B: 40–70, where R represents the intensity of red, G represents the intensity of green, and B represents the intensity of blue.

[0014] A high-efficiency and clean processing system for crested wheatgrass seeds includes, in sequence along the material processing direction: an integrated air screening device, which internally integrates an upper air separator, a middle screen, a lower gravity table, an awn remover, a pre-cleaner, a hole-filling cleaner, a gravity cleaner, and a color sorter; and a packaging and palletizing system; Its integrated air-separation equipment uses a deawning machine feed elevator to transport the air-separated material to the deawning machine's inlet. Multiple deawning machines are arranged in parallel. The material from the elevator passes through a three-way equalization valve and enters the corresponding deawning machine, ensuring uniform feeding of seeds before entering the deawning process. The deawned seeds are then sent to the feeding hopper via a discharge circulation conveyor belt. A pre-cleaning machine feed elevator is connected to the pre-cleaning machine, lifting the deawned seeds to the pre-cleaning machine's feed height and feeding them in. The pre-cleaning machine further cleans the seeds using a vibrating conveyor trough. Then, the seeds pass through an elevator and a circulating conveyor belt into an air screen cleaner for sorting. After sorting, the seeds are fed into the hole-hole cleaner via a hole-hole machine feeding elevator. The material from the hole-hole cleaner is connected to the gravity cleaner via a gravity lifting feeding elevator. The gravity cleaner is connected to the color sorter via a belt conveyor and a color sorter feeding elevator. The color sorter is connected to the automatic metering and packaging machine's feeding device and packaging and palletizing system via a conveying device. The pure seeds after color sorting are fed into the automatic metering and packaging machine for packaging. Finally, the palletizing equipment completes the palletizing. The integrated air screening equipment includes, from top to bottom, an air separation module, a screening module and a gravity table. The air separation module is used to remove light and heavy impurities, the screening module is used to remove large and small impurities, and the gravity table separates and removes light and poor-quality seeds based on gravity. The deawning machine includes a cylindrical shell with a discharge port at one end. The wall of the cylindrical shell is provided with a dust outlet and a material inlet. The cylindrical shell is coaxially rotatably connected to a rotating shaft. Multiple moving teeth are fixedly connected to the periphery of the rotating shaft, and multiple fixed teeth are fixedly connected to the inner wall of the cylindrical shell.

[0015] A screen is installed above the integrated air screening equipment.

[0016] The deawning machine is provided in multiple units and arranged in parallel, and the multiple deawning machines are controlled by a three-way uniform material valve for feeding.

[0017] It also includes an impurity classification and recovery system, which includes a non-utilizable impurity collection device and a utilizable impurity collection device connected to the impurity outlet of at least one of the integrated air screening equipment, deawning machine, pre-cleaning machine, micro-mesh cleaner, gravity cleaner and color sorter.

[0018] The beneficial effects of this invention are as follows: This invention, through a collaborative design of the entire process—"integrated air screening → awn removal → pre-cleaning machine → air screening machine → hole-filling machine → gravity sorting → color sorting"—combined with closed-loop recirculation regeneration, impurity classification and recovery, and intelligent control, constructs a highly integrated, intelligent, and clean crested wheatgrass seed processing system. It not only achieves breakthroughs in sorting efficiency but also makes significant progress in system integration, resource utilization, and production stability. Specifically, it has the following advantages: (1) The "screening-air separation-gravity" composite integrated air screening process is adopted to achieve multi-dimensional and efficient separation of impurities. The integrated air screening equipment integrates air separation, screening and gravity table to form a multi-dimensional separation mechanism of "size → density → suspension speed". (2) Set up a “grass feeder elevator” and a “grass remover” to ensure that the seeds are fed evenly before entering the grass removal process; avoid cross-contamination; effectively solve the problem of grass removal efficiency fluctuation caused by uneven feeding in traditional processes, reduce the risk of seed embryo damage, and improve the consistency of grass removal; (3) A "gravity separation return belt conveyor" is set up after the "gravity separator" to return lightweight but intact seeds (which may be misjudged due to slightly lower density) to the front end for reprocessing, thus avoiding waste of good seeds. At the same time, the "forced feeding agitator" and "forced feeding frequency conversion control system" ensure that the material enters the gravity separator evenly and stably, preventing bridging or material interruption. This closed-loop regeneration mechanism significantly improves the overall good seed recovery rate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the efficient and clean processing system for crested wheatgrass seeds in this invention; Figure 2 yes Figure 1 Enlarged schematic diagram of the local structure at point A; Figure 3 This is a flowchart illustrating the efficient and clean processing technology for crested wheatgrass seeds in this invention. Figure 4 This is a structural diagram of an integrated air screening device; Figure 5 This is a structural diagram of a deawning machine; Figure 6 This is a schematic diagram of the forced feeding agitator in this invention.

[0020] Attached reference numerals: 1. Cyclone dust collector; 2. Deawning machine feed elevator; 3. Deawning machine; 4. Pit feed hopper; 5. Forced feeding agitator; 6. Pre-cleaner feed elevator; 7. Impurity bin; 8. Pre-cleaner; 9. Air screen feed elevator; 10. Integrated air screening equipment; 11. Impurity collection device with no utilization value; 12. Impurity collection device with utilization value; 13. Hollow-out separator; 14. Hollow-out separator feed elevator; 15. Gravity separator feed elevator; 6. Gravity separator; 17. Color sorter; 18. Color sorter feed elevator; 19. Packaging system feed elevator; 20. Packaging and palletizing system; 21. Pulse dust collector; 22. Unloader; 23. Dust collector fan; 101. Air separation module; 102. Screening module; 103. Gravity table; 301. Shell; 302. Material inlet; 303. Dust outlet; 304. Moving gear; 305. Fixed gear; 306. Rotating shaft; 24. Propeller; 25. Drum. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figures 1-6 As shown, this embodiment provides: a high-efficiency clean processing system for crested wheatgrass seeds, including an integrated air screening device 10, a deawning machine 3, a pre-cleaning machine 8, a hole-filling cleaner 13, a gravity cleaner 16, a color sorter 17, and a packaging and palletizing system 20 connected sequentially along the material processing direction; The integrated air sorting device 10 includes, from top to bottom, an air sorting module 101, a screening module 102, and a gravity table 103. The air sorting module 101 is used to remove light and heavy impurities, the screening module 102 is used to remove large and small impurities, and the gravity table 103 separates and removes light and poor-quality seeds based on gravity. The airflow velocity of the air sorting module 101 is 5–12 m / s and the wind speed is adjustable. The spacing between the upper and lower screens of the screening module 102 is larger than and smaller than the size of the seeds, respectively. The longitudinal and transverse tilt angles of the gravity table 103 are adjustable, and the airflow under the table is also adjustable.

[0023] The deawning machine 3 includes a cylindrical shell 301 with a discharge port at one end. This cylindrical shell serves as the core processing chamber. Its cylindrical wall is scientifically designed with a dust outlet and a material inlet, achieving independent channels for feeding and dust removal. The cylindrical shell wall has a dust outlet 303 and a material inlet 302. A rotating shaft 306 is coaxially connected to the cylindrical shell 301. Multiple moving teeth 304 are fixed to the periphery of the rotating shaft 306, and multiple fixed teeth 305 are fixed to the inner wall of the cylindrical shell 301. The fixed teeth 305 and moving teeth 304 have a multi-prism structure. The rotational speed of the rotating shaft is set to 200–250 rpm. The deawning machine 3 is fed by a deawning machine feed elevator 2. Multiple deawning machines 3 are provided and arranged side-by-side. Multiple deawning machines 3 are fed by a uniform feed... The three-way valve controls the material supply; internally, a coaxially mounted rotating shaft 306 drives a set of moving teeth evenly distributed around the periphery to rotate at high speed, forming a dynamic meshing structure with the fixed teeth set rigidly fixed to the inner wall of the cylinder shell 301. When the material enters through the inlet, under the centrifugal thrust of the moving teeth and the blocking effect of the fixed teeth, a multi-dimensional violent collision, high-frequency friction and continuous kneading motion are formed. This composite mechanical force can accurately peel off impurities such as awns and husks attached to the seed surface. At the same time, the airflow guidance design allows the peeled fine dust to be quickly separated through a dedicated outlet, ultimately achieving the dual effect of efficient material purification and directional discharge of impurities, ensuring that the cleanliness of the treated seeds is significantly improved and their integrity is effectively protected.

[0024] The pre-cleaner 8 is fed by the pre-cleaner feed elevator 6. The discharge port of the deawning machine 3 will supply the seeds processed by the deawning machine 3 to the pre-cleaner feed elevator 6. The discharge port of the pre-cleaner 8 is connected to the impurity bin 7, which is used to store the impurities screened out by the pre-cleaner 8. The integrated air screening equipment 10 is equipped with an air screen feed elevator 9, and the discharge port of the impurity bin 7 corresponds to the air screen feed elevator 9.

[0025] The hole cleaning machine 13 is fed by the hole machine feed elevator 14, and the discharge port of the integrated air screening equipment 10 corresponds to the hole machine feed elevator 14.

[0026] The gravity separator 16 is fed by the gravity separator feed elevator 15, and the specific gravity range is set to 1.18–1.22 g / cm³.

[0027] Color sorter 17 is fed by color sorter feeder 18. Combined with high-resolution CCD camera and LED light source, color thresholds are set (R:80–120, G:60–90, B:40–70), where R represents the intensity of red, G represents the intensity of green, and B represents the intensity of blue.

[0028] The packaging palletizing system 20 is fed by the packaging system feed elevator 19, and the discharge port of the color sorter 17 corresponds to the packaging system feed elevator 19.

[0029] The feed inlets of the descaling machine feed elevator 2, the pre-cleaning machine feed elevator 6, and the air screen feed elevator 9 are each connected to a feeding mechanism consisting of a forced feeding agitator 5 and a frequency converter module. The feed end of the feeding mechanism is equipped with a pit feeding hopper 4, which is connected to the discharge port of the previous process. A propeller 24 is installed inside the pit feeding hopper 4, and a roller 25 is installed between the forced feeding agitator 5 and the pit feeding hopper 4. The propeller 24 forces the material into the roller 25, and the roller 25 agitates the material and then conveys it into the forced feeding agitator 5. An impurity collection device 11 and a valuable impurity collection device 12 are connected to the impurity outlets of at least one of the following: an integrated air screening device 10, a deawning machine 3, a hole cleaning machine 13, a gravity cleaning machine 16, and a color sorter 17. The light impurity outlet of the deawning machine 3 is equipped with a cyclone dust collector 1. The light impurity outlets of the cyclone dust collector 1, the integrated air screening equipment 10, the gravity separator 16, the color sorter 17, the deawning machine 3, and the packaging and palletizing system 20 are equipped with dust removal mechanisms, which include a pulse dust collector 21, a unloader 22, and a dust removal fan 23.

[0030] This embodiment also discloses a highly efficient and clean processing technology for crested wheatgrass seeds, including the following steps: a) Multi-stage air separation (integrated air screening equipment) The harvested wheat bran seed is fed into an integrated air screening device 10 via an air screen feed elevator 9. This integrated air screening device 10 integrates air separation, screening, and gravity separation functions, and achieves gradient separation of impurities through multi-stage synergistic action. The integrated air screening equipment 10 is equipped with a screen above it, which is used to remove large impurities (straw, soil, stones, etc.). Wind separation module 101: Under the action of a controllable airflow with a wind speed of 5–6 m / s, it blows out light dust and leaf fragments; Screening module 102: Separates medium-sized impurities (such as chrysanthemum fragments); Gravity Table 103: Utilizes the difference in suspension velocity and gravity between seeds and impurities to further separate light, poor-quality seeds from intact, high-quality seeds; All separated impurities are collected centrally by a system for collecting impurities with no utilization value; b) Deawn removal treatment: The seeds enter the deawn removal machine 3, and the speed is controlled at 200-250 rpm. The seeds are gently rubbed to remove the awns and avoid damage to the embryo. After deawn removal, the seeds are conveyed to the pre-cleaning machine 8 process by the pre-cleaning machine feed elevator 6. c) Air screening: The pre-cleaner feed elevator 6 transports the deawned seeds to the pre-cleaner 8, where large particles are further screened out. The pre-cleaner 8 uses the differences in seed size and weight to clean the seeds, which can further remove most of the impurities such as husks, debris, small and excessively mutated seeds from the forage seeds. d) Hole cleaning: The material after the pre-cleaner 8 enters the hole machine feed elevator 14 and is conveyed by the hole machine feed elevator 14 to the hole cleaner 13. The upper cylinder of the hole cleaner 13 removes short weed seeds from the pasture, and the lower cylinder of the hole cleaner 13 removes long weed seeds from the pasture. e) Gravity separation: After the seeds are cleaned, they are conveyed to the gravity separator 16 through the feed elevator 15. After entering the gravity separator 16, the specific gravity range is set to 1.18–1.22 g / cm³, and the seeds of good varieties, inferior varieties and different crops are efficiently separated on the vibrating screen plate. Light and inferior seeds are returned to the front end via a return conveyor belt for reprocessing, forming a closed-loop regeneration cycle that significantly improves the recovery rate of superior seeds. f) Intelligent color sorting: After specific gravity selection, the seeds are fed into the color sorter 17 via the feed elevator 18. Using a high-resolution CCD camera and LED light source, the color thresholds (R: 80–120, G: 60–90, B: 40–70) are set to remove moldy, insect-damaged, and abnormally colored seeds. Here, R represents the intensity of red, G represents the intensity of green, and B represents the intensity of blue. g) Automatic packaging: Pure seeds are accurately weighed by a packaging scale (25 kg per bag) and fed into the packaging and palletizing system 20 by the packaging system feed elevator 19 for sealing and packaging; h) Impurity sorting and recycling: Impurities with no value (dust, broken leaves, thorns) are centrally processed by the impurity collection device 11 and can be used for composting; Impurities with utilization value (such as partially intact foreign crop seeds and recyclable metals) are collected by the valuable impurities collection device 12 in two categories to achieve resource reuse.

[0031] The processing technology described in this embodiment yielded significant results: the total processed amount was comparable to the original harvest, but the yield of pure seeds increased dramatically, the seed purity was extremely high, the germination rate was excellent, the seed breakage rate was extremely low, and the removal of awns was excellent, almost completely eliminating them. Furthermore, some valuable impurities, mainly crested wheatgrass and alfalfa seeds, were successfully recovered during the processing. For example, taking 6 tons of crested wheatgrass seeds harvested from the Hexi Corridor region of Gansu Province, with an impurity rate of approximately 20%, including awns accounting for 6% and empty seeds accounting for 8%, the production results obtained using the processing technology described in this embodiment are as follows: Total processing capacity: 6.0 tons Pure seed yield: 4.78 tons Seed purity: 98.9% Germination rate (standard germination test): 87.1% Seed breakage rate: 1.1% Thorn removal rate: 99.3% The amount of useful impurities recovered was 102 kg (mainly crested wheatgrass and alfalfa seeds).

[0032] Through a collaborative design encompassing integrated air sorting, awn removal, pre-cleaning, pit cleaning, gravity sorting, and color sorting, combined with closed-loop recirculation regeneration, impurity classification and recovery, and intelligent control, a highly integrated, intelligent, and clean seed processing system for *Leymus chinensis* has been constructed. This system not only achieves breakthroughs in sorting efficiency but also makes significant progress in system integration, resource utilization, and production stability. Specifically, it offers the following advantages: (1) It pioneered a composite integrated air screening process of “screening-air separation-gravity” to achieve multi-dimensional and efficient separation of impurities; This invention abandons the traditional multi-device serial connection mode and adopts an integrated air screening device 10, which integrates an air separation module 101, a screening module 102, and a gravity table 103 to form a multi-dimensional sorting mechanism of "size → density → suspension velocity". The air separation module 101 (wind speed 5–6 m / s) blows out light dust and leaf fragments; Screening module 102 separates medium-sized impurities such as chaff fragments; The specific gravity platform 103 further separates light, empty seeds.

[0033] This integrated design avoids material loss and increased energy consumption caused by connecting multiple devices, significantly improves sorting efficiency and stability, and provides a high-cleanliness material basis for subsequent de-awning and color sorting.

[0034] (2) The integrated design of the awn removal and lifting system ensures continuous and stable operation. This invention features dedicated channels for the "deawning machine feed elevator 2" and the "deawning machine 3" to ensure uniform seed feeding before entering the deawning process. After deawning, the seeds are transported to the next stage via a dedicated elevator, avoiding cross-contamination. This design effectively solves the problem of fluctuating deawning efficiency caused by uneven feeding in traditional processes, reduces the risk of seed embryo damage, and improves deawning consistency.

[0035] (3) The specific gravity selection system has a reflux regeneration function, which constructs a closed-loop cycle and improves the recovery rate of improved seeds. This invention incorporates a "return belt conveyor" after the "gravity separator 16" to return lightweight but well-formed seeds (which may be misjudged due to slightly lower density) to the front end for reprocessing, thus avoiding waste of good seeds. Additionally, a feeding mechanism consisting of a "forced feeding agitator 5" and a "frequency converter module" can be installed at the gravity separator 16 to ensure uniform and stable material entry into the separator, preventing bridging or material interruption. This closed-loop regeneration mechanism significantly improves the overall good seed recovery rate and is one of the core innovations that distinguishes this invention from traditional open-loop sorting processes.

[0036] (4) Intelligent linkage control is realized in the color sorting and packaging process to improve the system flexibility. The “color sorter feed elevator 18” and the “packaging system feed elevator 19” ensure continuous material conveying; In addition, multiple "electric main valves" (or "electric three-way valves") can be set to realize automatic switching and flow control of multiple materials, and the process can be flexibly adjusted according to production needs (such as rework, sampling, and cleaning). This intelligent linkage design enables fully automated operation from seed material feeding to finished product packaging, reducing manual intervention and improving production efficiency and product consistency.

[0037] (5) The impurity classification and collection system realizes resource utilization, which is in line with the concept of green manufacturing. This invention innovatively sets up a dual-channel system: a "non-useful impurity collection device 11" and a "useful impurity collection device 12". The former collects worthless impurities such as dust, broken leaves, and thorns, which can be used for composting or incineration. The latter can recycle some intact seeds of different crops (such as wild oats and alfalfa) and reusable materials to achieve resource reuse.

[0038] This sorting and recycling mechanism not only reduces waste disposal costs but also creates additional economic value, embodying the concept of a circular economy.

[0039] (6) Full-process automation and central control improve production efficiency and manageability. Through multi-stage lifting and conveying equipment such as the "pre-cleaning machine material selection elevator 6", "specific gravity cleaning machine feeding elevator 15", and "packaging system feeding elevator 19", combined with electric valves and belt conveyors, fully automated continuous production from seed material feeding to finished product packaging is achieved, with a processing capacity of 3-5 tons / hour, significantly reducing labor costs.

[0040] The entire process is centrally controlled and managed, and key parameters (air volume, vibration frequency, flow rate) can be monitored and automatically adjusted in real time, improving the system's intelligence and manageability.

[0041] (7) Modular design facilitates maintenance and expansion, and the system is highly flexible. In the process, each core piece of equipment (such as the integrated air screening equipment 10, the deawning machine 3, the gravity separator 16, and the color sorter 17) is connected by an elevator to form an independent functional module, which facilitates single-machine maintenance, replacement or upgrade. The system is highly flexible and can adapt to different production scales and product processing needs.

[0042] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0043] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A highly efficient and clean processing technology for crested wheatgrass seeds, characterized in that, Includes the following steps: a) Multi-stage air separation: The wheatgrass seeds are fed into an integrated air separation device, which includes an air separation module, a screening module and a gravity table. Large impurities are removed by the upper screen, light and heavy impurities are removed by the air separation module, large and small impurities are removed by the screening module, and light and poor quality seeds are removed by gravity separation of the gravity table. b) Deawn removal: The seeds separated by air separation in step a) are fed into a deawning machine for mechanical deawn removal at a speed of 200–250 rpm; c) Air sieve cleaning: The seeds after the awn removal in step b) are sent to the pre-cleaner and cleaned according to the differences in seed size and quality. d) Hole cleaning: After the seeds have been cleaned by the air sieve in step c), they are sent to the hole cleaning machine to remove short and long weed seeds respectively; e) Gravity selection: After the seeds in step d) hole cleaning are sent to a gravity separator to separate good seeds from light and inferior seeds within a specific gravity threshold range of 1.18-1.22 g / cm³. f) Intelligent color sorting: The seeds after specific gravity selection in step e) are sent to a color sorter, and seeds with abnormal color are removed according to the set color threshold. g) Automatic packaging: The purified seeds after step f) color sorting are weighed and packaged.

2. The efficient and clean processing technology for crested wheatgrass seeds according to claim 1, characterized in that, In step a), the airflow velocity in the air separation duct is 5–12 m / s, and the wind speed is adjustable. The spacing between the upper and lower sieve plates of the sieving module is greater than and less than the size of the seed, respectively. The longitudinal and lateral tilt angles of the gravity table are adjustable, and the air volume under the table surface is also adjustable.

3. The efficient and clean processing technology for crested wheatgrass seeds according to claim 1, characterized in that, In step b), the awn removal machine includes fixed teeth and moving teeth, and the fixed teeth and moving teeth are multi-prism structures.

4. The efficient and clean processing technology for crested wheatgrass seeds according to claim 1, characterized in that, In step e), the separated light and inferior seeds are returned to the front-end process for reprocessing via a gravity return conveyor belt, forming a closed-loop regeneration cycle.

5. The efficient and clean processing technology for crested wheatgrass seeds according to claim 1, characterized in that, In step e), the forced feeding agitator cooperates with the frequency converter module to supply material to the gravity separator.

6. The efficient and clean processing technology for crested wheatgrass seeds according to claim 1, characterized in that, In step f), the color sorter uses a high-resolution CCD camera and an LED light source for identification, and the set color thresholds are R: 80–120, G: 60–90, B: 40–70, where R represents the intensity of red, G represents the intensity of green, and B represents the intensity of blue.

7. A highly efficient and clean processing system for crested wheatgrass seeds, characterized in that, The system includes, in sequence along the material processing direction: an integrated air screening device, which internally integrates an upper air separator, a middle screen, a lower gravity separator, a deawning machine, a pre-cleaner, a micro-mesh cleaner, a gravity cleaner, and a color sorter; as well as a packaging and palletizing system; Its integrated air screening equipment uses a deawning machine feeding elevator to transport the air-separated material to the deawning machine inlet. Multiple deawning machines are set up in parallel. The material from the elevator passes through a three-way equalization valve and enters the corresponding deawning machine to ensure that the seeds are fed evenly before entering the deawning process. The deawned seeds are sent to the feeding hopper via the discharge circulation conveyor belt. The pre-cleaning machine feeding elevator is connected to the pre-cleaning machine. The elevator lifts the deawned seeds to the pre-cleaning machine feeding height and sends them into it. The pre-cleaner further cleans the seeds through a vibrating conveyor trough, and then the seeds pass through an elevator and a circulating conveyor belt into an air screen cleaner for sorting. After sorting, the seeds are fed into the hole-hole cleaner by a hole-hole machine feeding elevator. The material from the hole-hole cleaner is connected to the gravity cleaner by a gravity lifting feeding elevator. The gravity cleaner is connected to the color sorter by a belt conveyor and a color sorter feeding elevator. The color sorter is connected to the automatic metering and packaging machine's feeding device and packaging and palletizing system through a conveying device. The color-sorted pure seeds are fed into the automatic metering and packaging machine for packaging, and finally, the palletizing equipment completes the palletizing. The integrated air screening equipment includes, from top to bottom, an air separation module, a screening module and a gravity table. The air separation module is used to remove light and heavy impurities, the screening module is used to remove large and small impurities, and the gravity table separates and removes light and poor-quality seeds based on gravity. The deawning machine includes a cylindrical shell with a discharge port at one end. The wall of the cylindrical shell is provided with a dust outlet and a material inlet. The cylindrical shell is coaxially rotatably connected to a rotating shaft. Multiple moving teeth are fixedly connected to the periphery of the rotating shaft, and multiple fixed teeth are fixedly connected to the inner wall of the cylindrical shell.

8. The efficient and clean processing system for crested wheatgrass seeds according to claim 7, characterized in that, A screen is installed above the integrated air screening equipment.

9. A high-efficiency, clean processing system for crested wheatgrass seeds according to claim 7, characterized in that, The deawning machine is provided in multiple units and arranged in parallel, and the multiple deawning machines are controlled by a three-way uniform material valve for feeding.

10. A high-efficiency, clean processing system for crested wheatgrass seeds according to claim 7, characterized in that, It also includes an impurity classification and recovery system, which includes a non-utilizable impurity collection device and a utilizable impurity collection device connected to the impurity outlet of at least one of the integrated air screening equipment, deawning machine, pre-cleaning machine, micro-mesh cleaner, gravity cleaner and color sorter.

Images