System for separating agaricus bisporus attachment substrate through winnowing coupling vibration screening and impurity removal method
The system, which combines air separation and vibrating screening, solves the problem of low separation efficiency between mushroom stems and substrate, achieving efficient, low-cost, and clean separation of mushroom stems, making it suitable for industrial applications.
Patent Information
- Application Number
- CN202610313415.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-13
- Publication Date
- 2026-04-21
AI Technical Summary
Existing technologies are insufficient for efficiently, cost-effectively, and cleanly separating the stems of Agaricus bisporus from the substrate, resulting in low efficiency in the resource utilization of the stems and risks of water waste and cross-contamination.
The system combines air separation and vibrating screening. It separates the mushroom stems from the substrate through an air-drying conveyor and a vibrating filter screen. The substrate is peeled off by air power and the residual mud is further separated by vibrating screening, resulting in an anhydrous treatment.
It achieves efficient and clean separation of mushroom stems, reduces energy and water consumption, improves the resource utilization rate of mushroom stems, reduces labor costs and the risk of cross-contamination, and is suitable for industrial applications.
Smart Images
Figure CN121892382A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of equipment technology for post-harvest processing of edible fungi and resource utilization of agricultural by-products, specifically to a system and method for separating the substrate on which Agaricus bisporus is attached by air separation coupled with vibrating sieve. Background Technology
[0002] As the scale of industrialized production of button mushrooms continues to expand, a large amount of mushroom stem byproducts are generated during harvesting and grading. Mushroom stems are rich in protein and fermentable organic matter, possessing potential for resource utilization as livestock feed ingredients or additives, anaerobic fermentation (producing biogas / biohydrogen), and composting. However, in practical use, the base of the mushroom stem often becomes clump-bound with the covering substrate and adheres to the tissues: firstly, soil impurities lead to higher feed ash content and poorer palatability, affecting feed safety and formula stability; secondly, inorganic inert components dilute degradable organic matter, reducing the organic load rate of anaerobic fermentation and increasing the inorganic proportion of digestion residues; thirdly, soil mixing disrupts the carbon-nitrogen ratio and aeration of compost, affecting the quality of decomposition. Therefore, efficient separation of mushroom stems from the attached substrate to achieve clean treatment at the source is a key prerequisite for improving the high-value utilization rate of mushroom stems.
[0003] The existing projects mainly use two simple treatment methods: (1) manual removal. Relying on workers to remove mud clumps one by one with knives / scrapers, it is suitable for small batches but has high labor intensity, low efficiency, poor consistency of cleanliness between batches, and labor costs increase nonlinearly with the amount of processing; (2) water washing. Using normal or high pressure water flow to peel off the substrate, the cleanliness can be improved in a short time, but it is still costly: First, it has high water consumption and wastewater treatment burden. The washing wastewater contains suspended mud and organic matter, which requires sedimentation-air flotation-biochemical treatment, etc., and the operation and maintenance costs are high; Second, the moisture content of the raw materials increases significantly, and subsequent feed drying or anaerobic fermentation solid content control requires additional heating energy and electricity consumption; Third, there is a risk of cross-contamination. Improper management of circulating water can easily cause microbial load and odor problems. Some companies have tried single mechanical separation such as drum screens, but because the adhesion between the covering substrate and the mushroom stem surface is strong, single-stage screening often results in screen sticking, hole blockage and incomplete sorting, making it difficult to balance efficiency, energy consumption and cleanliness. Overall, existing technologies are insufficient to meet the comprehensive needs of large-scale, clean, low-cost, and automated continuous operation of mushroom stem processing.
[0004] Therefore, those skilled in the art are dedicated to developing a water-saving (or waterless), low-energy-consumption, and continuous impurity removal device and process. This process can rapidly peel off the adhering matrix without introducing large amounts of process water, and can also be finely controlled through physical parameters to adapt to different moisture content, particle size, and adhesion state, ensuring stable and repeatable separation results. Summary of the Invention
[0005] In view of the shortcomings of the existing technology, this invention proposes a coupled technical route combining air separation and vibrating screening: mushroom stems enter the air separation unit via a feeding conveyor belt, and are conveyed at a uniform speed by the conveyor belt within a closed cavity. directional airflow and localized cyclones are formed using adjustable air pressure outlets at the top of the cavity to strip and dry the loose substrate, simultaneously weakening the adhesion between the substrate and the mushroom stem tissue and reducing the surface moisture content. The material then enters the vibrating screening unit, where the mechanical separation of residual mud clumps and fine substrate is achieved by setting a combination of vibration frequency, amplitude, screen mesh size, and screen inclination angle. Finally, clean mushroom stems are output from the end, while impurities are collected through the collection port. This coupled mode organically links "air drying and de-adhesion followed by mechanical separation," effectively overcoming the limitations of single-stage screening or simple rinsing.
[0006] Compared with traditional water washing and manual methods, the route described in this invention has a clear engineering orientation: (1) the impurity removal rate and cleanliness can be significantly improved, and the differences in raw materials of different batches can be adapted by adjusting the process parameters; (2) the water consumption is close to zero, and basically no wastewater is generated. The transfer of impurities changes from "water phase" to "dry phase", which is convenient for centralized collection and resource disposal; (3) the unit processing energy consumption and overall cost are reduced, and the gas-solid coupling is shorter and more efficient than the hot drying-water washing-re-drying link; (4) the level of automation and continuity is improved, and it can be linked with the front and back end grading, metering, packaging or tank entry processes, reducing manual dependence and improving workshop hygiene and safety.
[0007] This mushroom stem substrate separation system, which combines air separation and vibrating screening, can achieve efficient, low-consumption, and clean impurity removal of button mushroom stems without using large amounts of process water. It provides a stable and clean raw material input for subsequent livestock and poultry feed formulation, anaerobic digestion, and composting, and has good prospects for industrialization and environmental benefits.
[0008] To achieve the above-mentioned technical objectives, the present invention mainly adopts the following technical solutions: This invention discloses a system for separating the substrate of *Agaricus bisporus* using air-separation coupled with vibrating sieve, comprising: Feeding elevator: used to lift the button mushrooms to the drying conveyor; Air drying conveyor: Located below the discharge port of the feeding elevator, with a cover plate installed on top. Multiple air outlets are connected to the cover plate and connected to the air conveying pipe at the top of the conveyor through an air outlet pipe. It is used to air-select and remove impurities from the button mushrooms on the upper part of the air drying conveyor. Top air duct of conveyor: connected to pressure-controlled air tank, which is connected to air compressor, for providing cyclone to the air drying conveyor; Vibrating filter screen: Located below the discharge port of the air-drying conveyor, it achieves vibration separation of button mushrooms from their substrate through vibration.
[0009] In a preferred embodiment of the present invention, the feeding elevator is provided with a plurality of partitions at even intervals.
[0010] In a preferred embodiment of the present invention, the discharge port of the feeding elevator is inclined downward and is located above the inlet of the air-drying conveyor.
[0011] In a preferred embodiment of the present invention, the air-drying conveyor is driven by a motor to rotate the pulley, thereby realizing the rotation of the conveyor belt, and the distance between the cover plate and the conveyor belt is 85 mm.
[0012] In a preferred embodiment of the present invention, a plurality of air supply pipes are evenly spaced along the direction of movement of the button mushrooms. The air supply pipes are located above the cover plate, and a plurality of air outlet pipes are arranged perpendicularly to the cover plate on the air supply pipes. The air outlets of the air outlet pipes are arranged in the direction of the conveyor belt of the air drying conveyor.
[0013] Preferably, there are 3 air supply pipes, and each air supply pipe has 3 air outlet pipes evenly spaced.
[0014] In a preferred embodiment of the present invention, the mesh size of the vibrating filter screen is 5 mm.
[0015] This invention also discloses a method for removing impurities from the substrate for attachment of Agaricus bisporus, using the system described above, comprising the following steps: Step 1: Use the feeding elevator to transport the mushroom stems to be processed to the drying conveyor and move with the conveyor belt; Step 2: As the mushroom stems of the button mushrooms move along the conveyor belt, the air compressor starts and pumps compressed air into the pressure-controlled air tank. The air tank then pumps cyclone pumps through the air pipe into the air-drying conveyor to act on the mushroom stems. The substrate attached to the mushroom stems is partially dried and broken. Subsequently, the sample falls into the final vibrating filter screen along the conveyor belt. Step 3: The vibrating filter screen further separates the mushroom stem substrate through strong vibration. The substrate that is shaken off by the vibration falls through the screen into the recycling area, while the relatively clean mushroom stems fall into the finished product recycling chamber along the slope of the vibrating screen under the action of vibration and gravity.
[0016] In a preferred embodiment of the present invention, the rated power of the feeding elevator is 0.75 kW, and the processing capacity is 1-3 T / h; the wheel shaft speed of the feeding elevator is 10-50 r / min, and the transmission rate is 1.5-7.5 m / min; the rated power of the air-drying conveyor is 0.75 kW, and the processing capacity is 1-3 T / h; the wheel shaft speed of the air-drying conveyor is 10-50 r / min, and the transmission rate is 1.5-7.5 m / min; the rated power of the vibrating filter screen is 0.24 kW, and the processing capacity is 1-3 T / h.
[0017] In a preferred embodiment of the present invention, the cyclone wind force is 0.2 MPa.
[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. Achieving the standards for subsequent resource utilization of mushroom stems: This system innovatively couples air separation and vibrating screening processes to achieve efficient separation of mushroom stems from their attached substrate, and obtains relatively clean mushroom stem products that meet the raw material standards for subsequent feed preparation, anaerobic fermentation and composting. 2. Achieve waterless treatment and harmless recycling of mushroom stems: This system can achieve efficient separation of mushroom stem substrate through a purely mechanical process under waterless conditions, and solves the problems of water absorption and denaturation of raw materials, water pollution and waste caused by traditional water washing methods, thereby further realizing the harmless recycling of finished mushroom stems.
[0019] 3. Provides an automated industrial demonstration: The entire system can be remotely controlled via a terminal, balancing ease of operation with high processing efficiency. With a high degree of automation, it can serve as a demonstration for subsequent industrial applications.
[0020] 4. Reduced economic costs: The economic cost of this system mainly comes from electricity. There is no need for additional costs such as biochemical pretreatment, water, and excessive labor. Overall, the cost of mushroom stem processing is reasonable and has good technical and economic efficiency.
[0021] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the system for separating the substrate of Agaricus bisporus by air separation coupled with vibration sieving provided by the present invention; In the diagram: 1. Air compressor; 2. Pressure-controlled air tank; 3. Control panel; 4. Wires; 5. Button mushroom stem; 6. Feeding elevator; 7. Air duct; 8. Drying conveyor; 9. Vibrating filter screen; Figure 2 Samples of mushroom stems and substrate from Agaricus bisporus under field testing: (A) Mushroom stems before treatment; (B) Mushroom stems after treatment; (C) Substrate separated by sieving; Figure 3 Comparison of the treatment effects of Agaricus bisporus stems under the processes of air separation for impurity removal, vibrating sieving alone, and air separation coupled with vibrating sieving: (A) Substrate removal rate; (B) Stem cleanliness; Figure 4 Comparison of the efficiency of this air-separation and impurity removal coupled vibrating screen system in processing mushroom stems under different drying conditions: (A) substrate removal rate; (B) stem cleanliness. Detailed Implementation
[0023] The following description, with reference to the accompanying drawings, illustrates several preferred embodiments of the present invention to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.
[0024] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components is appropriately exaggerated in the drawings.
[0025] Example 1: System and impurity removal method for separating the substrate of Agaricus bisporus using air-separated coupled vibrating sieve.
[0026] like Figure 1 The system shown is an air-separation coupled vibrating screen for separating the substrate attached to *Agaricus bisporus*, comprising four functional components: a feeding elevator, an air-drying conveyor, an air duct at the top of the conveyor, and a vibrating filter screen. Feeding elevator: Used to lift button mushrooms to the drying conveyor. The feeding elevator has multiple evenly spaced baffles to prevent the mushrooms from falling during the feeding process. The feeding elevator can be driven by a motor-driven track, with the baffles mounted on the track. The discharge port of the feeding elevator is angled downwards and located above the inlet of the drying conveyor. After being fed, the button mushrooms fall through the discharge port to the inlet of the drying conveyor for further transfer.
[0027] Air-drying conveyor: Located below the discharge port of the feeding elevator, it receives the button mushrooms falling from below the discharge port. Generally, the air-drying conveyor uses a motor to drive a pulley, which in turn rotates the conveyor belt, thus transporting the button mushrooms. A cover plate is installed on top of the air-drying conveyor, with a distance of 85 mm between the cover plate and the conveyor belt, forming an enclosed upper space. This distance facilitates air separation and impurity removal. Multiple air outlets are connected to the cover plate, and these outlets are connected to the air ducts at the top of the conveyor via air ducts for air separation and impurity removal of the button mushrooms above the air-drying conveyor. Multiple air ducts are evenly spaced along the direction of button mushroom movement, located above the cover plate. Multiple air outlets are vertically arranged on the air ducts, with their outlets facing the direction of the conveyor belt.
[0028] Preferably, in this invention, there are three air supply pipes, and each air supply pipe has three air outlet pipes evenly spaced. Generally, the three air outlet pipes are located at the front, middle and rear of the cover plate, respectively. In the process of air separation and impurity removal, multiple positions on the air drying conveyor can be covered, resulting in good impurity removal effect.
[0029] Top air duct of the conveyor: connected to a pressure-controlled air tank, which is connected to an air compressor, to provide cyclones to the air-drying conveyor.
[0030] Vibrating filter screen: Located below the discharge port of the air-drying conveyor, it achieves the vibration separation of button mushrooms from their substrate through vibration. The screen mesh diameter of the vibrating filter screen is 5mm.
[0031] The operation of the above four functional components is mainly controlled by the controller, which is connected to the controller and wires. No further explanation will be given here.
[0032] In this invention, the rated power of the feeding elevator is 0.75 kW, and the processing capacity is 1-3 T / h; the wheel shaft speed of the feeding elevator is 10-50 r / min, and the transmission rate is 1.5-7.5 m / min; the rated power of the air-drying conveyor is 0.75 kW, and the processing capacity is 1-3 T / h; the wheel shaft speed of the air-drying conveyor is 10-50 r / min, and the transmission rate is 1.5-7.5 m / min; the rated power of the vibrating filter screen is 0.24 kW, and the processing capacity is 1-3 T / h.
[0033] The feeding elevator is responsible for conveying the mushroom stems to be processed to the air-drying conveyor. After entering the air-drying conveyor, the mushroom stems continue to move with the conveyor belt. During this process, the air compressor starts and pumps compressed air into the pressure-controlled air storage tank. The air storage tank then pumps 0.2 MPa cyclone pumps into the conveyor through the air delivery hose to act on the mushroom stems. Through the first stage of air separation and impurity removal, the substrate attached to the mushroom stems is partially dried and broken. The sample then falls with the conveyor belt into the final vibrating filter screen. After the motor is started, the vibrating filter screen further separates the mushroom stem substrate through strong vibration. The substrate shaken off by the vibration falls through the 5 mm screen into the recycling area, while the relatively clean mushroom stems fall into the finished product recycling chamber along the slope of the vibrating screen under the action of vibration and gravity.
[0034] Mushroom stems before processing, mushroom stems after processing, and sieved substrate are shown below. Figure 2 As shown, untreated mushroom stems carry a large amount of soil substrate, making them difficult to utilize directly as resources; treated mushroom stems have significantly improved cleanliness, with only trace amounts of adhesive substrate adhering to them, resulting in a significantly higher degree of subsequent resource utilization.
[0035] Example 2: Comparison of substrate removal rate and stem cleanliness of Agaricus bisporus stems under the equipment of the present invention in the treatment of only air separation and impurity removal, only vibrating screening, and air separation and impurity removal coupled with vibrating screening.
[0036] To clarify the efficiency of the equipment of this invention under various processing techniques, a comparative experiment was conducted on the substrate removal rate (removal rate = mass of removed substrate / total mass of attached substrate × 100%) and stem cleanliness (cleanliness = mass of clean stem / total mass of sample after impurity removal × 100%) of *Agaricus bisporus* stems under three treatment methods: air separation only, vibrating sieving only, and air separation + vibrating sieving. This experiment was divided into three groups: the "air separation" group, the "vibrating sieving" group, and the "air separation + vibrating sieving" group. Each group processed 10 kg of stem samples from the same source, and a total of 6 rounds of treatment were performed. The substrate removal rate and stem cleanliness of each group were compared under each round of treatment.
[0037] like Figure 3 As shown, the substrate removal rate and stem cleanliness of each experimental group increased with the number of treatment rounds, reaching a plateau after the 5th round, indicating that each group could achieve the ideal impurity removal effect after 5 rounds of treatment, and the improvement was not significant after 5 rounds. In terms of performance indicators, the substrate removal rate and stem cleanliness of the "air separation" group were significantly higher than those of the "vibrating sieving" group in each round of treatment, highlighting the effectiveness of the air separation process. The "air separation + vibrating sieving" group consistently maintained the highest substrate removal rate and stem cleanliness, increasing by about 10% compared to the "air separation" group, highlighting the superiority of process coupling. In the final 6 rounds of treatment, the substrate removal rates of the "air separation + vibrating sieving" group, the "air separation" group, and the "vibrating sieving" group were 75.16%, 69.44%, and 37.52%, respectively, and the stem cleanliness was 88.43%, 85.44%, and 74.35%, respectively. In summary, the air separation and vibration screening process is superior to either air separation alone or vibration screening alone in terms of impurity removal. The innovative coupling of the two processes can further achieve the ideal mushroom stem substrate removal rate and cleanliness.
[0038] Example 3: Comparison of the efficiency of this air-separation and impurity removal coupled vibrating screen system in processing mushroom stems of Agaricus bisporus under different drying conditions.
[0039] Drying pretreatment helps to dry and clump the wet substrate of *Agaricus bisporus* stems, reducing its moisture content and thus improving the impurity removal efficiency of subsequent equipment. To further improve the substrate removal rate and stem cleanliness after equipment treatment, and to clarify the synergistic effect of drying pretreatment, a comparative experiment was conducted on the efficiency of this equipment in treating *Agaricus bisporus* stems under different drying conditions. The drying temperature was kept constant at 50 ℃. Based on different drying times, the "undried" group served as the control group, and the experimental groups were "dried for 1 h," "dried for 2 h," "dried for 3 h," "dried for 4 h," and "dried for 5 h." After drying, 10 kg of stem samples were taken from the control group and each experimental group for subsequent equipment testing. A total of three rounds of equipment treatment were conducted, and the substrate removal rate and stem cleanliness of each group were compared in each round of treatment.
[0040] like Figure 4 As shown, the substrate removal rate and mushroom stem cleanliness of both the control group and each experimental group increased linearly with the increase of the number of treatment rounds. Furthermore, the substrate removal rate and mushroom stem cleanliness at each treatment round increased with the extension of drying time, highlighting the synergistic effect of drying pretreatment. Reflected in the above two indicators, the "drying for 1 h" and "drying for 2 h" groups showed slight improvements compared to the control group, while the "drying for 3 h," "drying for 4 h," and "drying for 5 h" groups showed significant improvements. This indicates that "drying for 3 h" is the critical point for significant synergistic effect; under this drying condition, the substrate is effectively dried, and its adhesion is significantly reduced, which is beneficial for the subsequent equipment impurity removal process. After three rounds of treatment, the substrate removal rates of the control group, the "drying for 1 h", "drying for 2 h", "drying for 3 h", "drying for 4 h", and "drying for 5 h" groups reached 54.80%, 58.90%, 59.86%, 64.10%, 74.62%, and 81.91%, respectively, and the mushroom stem cleanliness reached 83.06%, 86.01%, 86.19%, 90.91%, 91.93%, and 93.20%, respectively. In conclusion, the 50 ℃ drying pretreatment strategy, especially the strategy of drying for 3 h or more, can serve as a significant means to enhance the equipment's impurity removal efficiency and is worthy of promotion for subsequent industrial applications.
[0041] Example 4: Economic Cost Analysis of This Air-Separation and Impurity Removal Coupled Vibrating Screening System for Processing Agaricus bisporus Stems
[0042] Based on the results of the above embodiments, the optimal method for treating mushroom stems is as follows: first, pre-treat the mushroom stems by drying for 5 hours, then employ a coupled process of "air separation for impurity removal + vibrating sieving" and control the total number of treatment rounds to 5. This combination can fully leverage the advantages of drying to enhance matrix separation and the synergistic effect of the coupled process, ultimately achieving the highest matrix removal effect. The matrix removal ratio (matrix removal ratio = mass of removed matrix / total mass of treated sample × 100%) after 3 rounds of treatment can reach 32.87%, and its matrix removal ratio and improvement rate are significantly better than other processes and conditions.
[0043] As shown in the table below, the mushroom stem processing equipment, based on a processing capacity of 10 kg, has an electricity cost of 0.6 yuan / kWh. The cost of one cycle of operation at the equipment's rated power is 0.171 yuan / kg, and the cost of three cycles is 0.513 yuan / kg. The dryer has a rated power of 40 kW. Based on a batch drying capacity of 300 kg of sample, the electricity cost per kg of dried product for drying times of 1 h to 5 h is 0.08, 0.16, 0.24, 0.32, and 0.40 yuan respectively.
[0044]
[0045]
[0046] In summary and as shown in the table below, the 1-hour drying + 3-cycle coupling process offers the best cost-effectiveness. Its matrix removal rate reaches 22.21%, which, although lower than the 5-hour drying group, results in a total cost of only 0.593 yuan / kg. The removal rate per unit cost (37.45% / yuan) is higher than other solutions, significantly reducing the overall cost of drying and processing while ensuring good impurity removal.
[0047]
[0048] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.
Claims
1. A system for separating the substrate of *Agaricus bisporus* using air-separation coupled with vibrating sieve, characterized in that, include: Feeding elevator: used to lift the button mushrooms to the drying conveyor; Air drying conveyor: Located below the discharge port of the feeding elevator, with a cover plate installed on top. Multiple air outlets are connected to the cover plate and connected to the air conveying pipe at the top of the conveyor through an air outlet pipe. It is used to air-select and remove impurities from the button mushrooms on the upper part of the air drying conveyor. Top air duct of conveyor: connected to pressure-controlled air tank, which is connected to air compressor, for providing cyclone to the air drying conveyor; Vibrating filter screen: Located below the discharge port of the air-drying conveyor, it achieves vibration separation of button mushrooms from their substrate through vibration.
2. The system for separating the substrate of *Agaricus bisporus* by air separation coupled with vibrating sieve according to claim 1, characterized in that, The feeding elevator is equipped with multiple partitions at even intervals.
3. The system for separating the substrate of *Agaricus bisporus* by air separation coupled with vibrating sieve according to claim 1, characterized in that, The discharge port of the feeding elevator is inclined downward and is located above the inlet of the air drying conveyor.
4. The system for separating the substrate of *Agaricus bisporus* by air separation coupled with vibrating sieve according to claim 1, characterized in that, The air-drying conveyor is driven by a motor to rotate the pulley, thereby rotating the conveyor belt. The distance between the cover plate and the conveyor belt is 85 mm.
5. The system for separating the substrate of *Agaricus bisporus* by air separation coupled with vibrating sieve according to claim 1, characterized in that, Multiple air supply pipes are evenly spaced along the direction of movement of the button mushrooms. The air supply pipes are located above the cover plate, and multiple air outlet pipes are arranged perpendicularly to the cover plate on the air supply pipes. The air outlets of the air outlet pipes are arranged in the direction of the conveyor belt of the air drying conveyor.
6. The system for separating the substrate of *Agaricus bisporus* by air separation coupled with vibrating sieve according to claim 5, characterized in that, The air supply pipes are configured as three, and each air supply pipe has three air outlet pipes evenly spaced.
7. The system for separating the substrate of *Agaricus bisporus* by air separation coupled with vibrating sieve according to claim 1, characterized in that, The vibrating filter screen has a mesh size of 5mm.
8. A method for removing impurities from the substrate for attaching Agaricus bisporus, characterized in that, The system described in any one of claims 1-7 comprises the following steps: Step 1: Use the feeding elevator to transport the mushroom stems to be processed to the drying conveyor and move with the conveyor belt; Step 2: As the mushroom stems of the button mushrooms move along the conveyor belt, the air compressor starts and pumps compressed air into the pressure-controlled air tank. The air tank then pumps cyclone pumps through the air pipe into the air-drying conveyor to act on the mushroom stems. The substrate attached to the mushroom stems is partially dried and broken. Subsequently, the sample falls into the final vibrating filter screen along the conveyor belt. Step 3: The vibrating filter screen further separates the mushroom stem substrate through strong vibration. The substrate that is shaken off by the vibration falls through the screen into the recycling area, while the relatively clean mushroom stems fall into the finished product recycling chamber along the slope of the vibrating screen under the action of vibration and gravity.
9. The method according to claim 8, characterized in that, The rated power of the feeding elevator is 0.75 kW, and the processing capacity is 1-3 T / h; the wheel shaft speed of the feeding elevator is 10-50 r / min, and the transmission rate is 1.5-7.5 m / min; the rated power of the air-drying conveyor is 0.75 kW, and the processing capacity is 1-3 T / h; the wheel shaft speed of the air-drying conveyor is 10-50 r / min, and the transmission rate is 1.5-7.5 m / min; the rated power of the vibrating filter screen is 0.24 kW, and the processing capacity is 1-3 T / h.
10. The method according to claim 8, characterized in that, The cyclone wind force is 0.2 MPa.