Drying system for solid state fermentation

Abstract

The utility model provides a kind of drying system for solid state fermentation, including oven, the bottom of oven is anti-falling material wind board, and the lower portion of anti-falling material wind board is equipped with collection box, and the lateral wall of collection box is connected to the air outlet of hot air fan by first air conveying pipeline, and one end of first air conveying pipeline and second air conveying pipeline are in parallel, and the other end of second air conveying pipeline is detachably connected with one end of air outlet pipe, and air outlet pipe is located inside oven, and condensation top plate is further fixed on second air conveying pipeline, and condensation top plate covers oven top portion, but does not contact with oven.The utility model has the beneficial effects that (1) improve heating uniformity, reduce manual intervention;(2) avoid condensate pollution, protect fermentation material quality;(3) efficiently handle odor, improve working environment.

Description

Technical Field

[0001] This utility model belongs to the technical field of solid-state fermentation drying equipment, and in particular relates to a drying system for solid-state fermentation. Background Technology

[0002] Solid-state fermentation is a crucial step in the efficient utilization of organic waste resources. By reducing or removing anti-nutritional factors or harmful components, it can lower livestock and agricultural costs, extend storage time, and improve subsequent utilization efficiency. Existing solid-state fermentation drying systems mostly use a single heat source (such as bottom hot air heating) in conjunction with an oven for drying, but in practical applications, the following prominent problems exist:

[0003] (1) The heating efficiency is low and the heating is uneven, relying on manual intervention.

[0004] Traditional drying systems typically introduce hot air only from the bottom of the oven in one direction. This uneven distribution of hot air within the oven leads to significant differences in drying rates between the upper and lower layers, and between the center and edges of the solid-state fermentation process, easily resulting in localized over-drying or under-drying. To improve heating uniformity, the solid-state fermentation material needs to be manually stirred periodically. This not only increases labor costs but may also cause clumping, uneven fermentation, and a decline in nutritional quality if stirring is not timely.

[0005] (2) Inadequate control of condensate water caused secondary pollution during solid-state fermentation.

[0006] The hot and humid air inside the oven easily produces condensation when it comes into contact with the cold top wall. Traditional systems lack a dedicated condensation collection structure, and the condensation drips directly onto the surface of the fermentation material, causing local moisture to rise and even leading to microbial growth, which affects the quality of the solid-state fermentation material. At the same time, the dripping condensation may also carry dust and impurities from the top of the oven, causing contamination of the fermentation material.

[0007] (3) The odor spreads severely, polluting the working environment.

[0008] Solid-state fermentation releases volatile, toxic, and harmful odorous gases such as ammonia and hydrogen sulfide. Traditional systems often directly discharge these gases into the atmosphere without effective odor control devices. Long-term operation leads to excessive odor concentrations in the work area, endangering the health of operators and impacting the surrounding environment.

[0009] Therefore, there is an urgent need for a solid-state fermentation system that can improve heating efficiency, avoid condensate pollution, effectively treat odors, and reduce human intervention, in order to overcome the above-mentioned shortcomings of existing technologies. Summary of the Invention

[0010] To address the problems in the prior art, this utility model provides a drying system for solid-state fermentation, including an oven. The bottom of the oven is a material-preventing air plate, and a collection box is located below the material-preventing air plate. The side wall of the collection box is connected to the air outlet of a hot air blower through a first air duct. One end of the first air duct and one end of a second air duct are connected in parallel, and the other end of the second air duct is detachably connected to one end of an air outlet pipe. The air outlet pipe is located inside the oven. A condensing top plate is also fixed on the second air duct, covering the top of the oven but not in contact with it.

[0011] In a preferred embodiment, the side wall of the collection box is also provided with several inspection holes.

[0012] In a preferred embodiment, the anti-falling air plate is provided with an array of ventilation holes, and each ventilation hole is fixedly provided with a baffle.

[0013] In a more preferred embodiment, the notches of the baffles are arranged in the same direction between columns and in opposite directions between columns.

[0014] In a preferred embodiment, the end of the second air duct near the air outlet duct is a corrugated pipe, which is used to adjust the height of the air outlet duct inside the oven.

[0015] In a preferred embodiment, the side eaves of the condensing top plate are provided with condensing grooves, and a drain hole is provided at the bottom of the condensing grooves. The drain hole is fixedly connected to one end of the first drain pipe, and the other end of the first drain pipe is connected to the condensate collection point.

[0016] In a preferred embodiment, the space above the oven is a suspended ceiling, on which several air inlet hoods are installed. The air outlet of the air inlet hood is connected to the air inlet of the filter box through an air inlet pipe. An exhaust fan is installed on the air outlet pipe of the filter box, and the air outlet of the exhaust fan is connected to the atmosphere through a pipe.

[0017] In a more preferred embodiment, the filter box has several layers of filter plates on the inner wall between the air inlet and the air outlet, and the filter plates are provided with an adsorption layer.

[0018] In a more preferred embodiment, the bottom of the filter box is provided with a second drain pipe, the other end of which is connected to a condensate collection point.

[0019] The beneficial effects of this utility model are:

[0020] (1) The system adopts a dual-path heating design with the first air supply pipe and the second air supply pipe connected in parallel: the first air supply pipe can send hot air from the bottom of the oven (below the anti-fall air plate), and the second air supply pipe sends air directly into the oven through the air outlet pipe, forming a multi-directional hot air circulation. This bidirectional heating mode can effectively improve the heat distribution in the oven, avoid the problem of uneven heating in local areas during solid-state fermentation, reduce the clumping phenomenon caused by drying differences, and thus reduce the need for manual stirring.

[0021] (2) The condensing top plate covers the top of the oven without direct contact, which can intercept the condensation formed by the hot and humid air inside the oven; the condensing groove works in conjunction with the first drain pipe to collect the condensation and discharge it to a designated location, thus completely solving the problem of local dampness or impurity contamination caused by condensation dripping onto the surface of solid fermentation materials in the traditional system, and ensuring the cleanliness of the solid fermentation process.

[0022] (3) The odorous gas generated in the oven is collected through the air intake hood in the ceiling and introduced into the filter box through the air intake pipe. The multi-layer filter plate and its adsorption layer in the filter box can specifically adsorb the solid fermentation odor components (such as volatile organic compounds, ammonia, etc.). The purified gas is discharged through the exhaust fan, which effectively reduces the spread of odor and reduces the impact on the work area and the surrounding environment, which meets the environmental protection requirements. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the structure of the anti-falling air plate at the bottom of the oven in this utility model.

[0025] In the diagram: 1. Hot air blower; 2. First air duct; 3. Second air duct; 4. Condensing top plate; 5. First drain pipe; 6. Air outlet pipe; 7. Drying oven; 701. Anti-falling air plate; 702. Baffle; 8. Collection box; 9. Inspection hole; 10. Ceiling; 11. Air inlet hood; 12. Air inlet pipe; 13. Filter box; 14. Filter plate; 15. Exhaust fan; 16. Second drain pipe; 17. Condensing trench. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] Example

[0028] like Figure 1The drying system shown for solid-state fermentation includes an oven 7. The bottom of the oven 7 is a material-preventing air plate 701. Below the material-preventing air plate 701, there is a collection box 8. The side wall of the collection box 8 is connected to the air outlet of the hot air blower 1 through a first air duct 2. One end of the first air duct 2 is connected in parallel with one end of the second air duct 3. The other end of the second air duct 3 is detachably connected to one end of the air outlet pipe 6. The air outlet pipe 6 is located inside the oven 7. A condensing top plate 4 is also fixed on the second air duct 3. The condensing top plate 4 covers the top of the oven 7 but does not contact the oven 7.

[0029] Two air supply structures are set up to increase the efficiency of solid-state fermentation and drying, and the air outlet pipe 6 is inserted into the center of solid-state fermentation to ensure that solid-state fermentation is heated evenly; the condenser top plate 4 can also reduce the amount of condensate dripping onto the solid-state fermentation material, thus reducing the probability of contamination.

[0030] Furthermore, the side wall of the collection box 8 is provided with several inspection holes 9. When the solid fermentation material falls into the collection box 8, the inspection holes 9 are opened to clean the inside of the collection box 8 regularly.

[0031] like Figure 2 The anti-falling material wind plate 701 shown has an array of ventilation holes, and each ventilation hole is fixedly equipped with a baffle 702.

[0032] The baffle 702 reduces the probability of solid fermentation material particles falling into the collection box 8, extends the cleaning cycle of the collection box 8, and reduces the loss of solid fermentation material.

[0033] Furthermore, the notches of the baffle 702 are arranged in the same direction between columns and in opposite directions between columns.

[0034] This allows heat to be blown more evenly onto the solid fermentation material, improving the efficiency of solid fermentation drying.

[0035] Furthermore, the second air duct 3 is corrugated at the end near the air outlet duct 6, which is used to adjust the height of the air outlet duct 6 inside the oven 7.

[0036] This allows the air outlet duct 6 to adapt to solid fermentation materials of different heights, increasing its adaptability.

[0037] Furthermore, the side eaves of the condensing top plate 4 are provided with a condensing groove 17, and a drain hole is provided at the bottom of the condensing groove 17. The drain hole is fixedly connected to one end of the first drain pipe 5, and the other end of the first drain pipe 5 is connected to the condensate collection point.

[0038] Furthermore, the space above the oven 7 is a suspended ceiling 10, and the suspended ceiling 10 is provided with several air inlet hoods 11. The air outlet of the air inlet hood 11 is connected to the air inlet of the filter box 13 through an air inlet pipe 12. An exhaust fan 15 is provided on the air outlet pipe of the filter box 13, and the air outlet of the exhaust fan 15 is connected to the atmosphere through a pipe.

[0039] Furthermore, the filter box 13 has several layers of filter plates 14 on the inner wall between the air inlet and the air outlet, and the filter plates 14 are provided with an adsorption layer.

[0040] The adsorption layer is made of activated carbon particles, which can effectively adsorb odor gases emitted during the drying of solid fermentation materials, thus reducing air pollution.

[0041] Furthermore, the bottom of the filter box 13 is provided with a second drain pipe 16, and the other end of the second drain pipe 16 is connected to the condensate collection point.

[0042] The operation of the above system is as follows: Ensure that the inspection hole 9 of the collection box 8 is closed and sealed; confirm that the filter plate 14 and adsorption layer in the filter box 13 are installed in place; adjust the height of the air outlet pipe 6 in the drying oven 7 according to the thickness of the solid fermentation material to be dried through the corrugated pipe of the second air supply pipe 3 so that the air outlet of the air outlet pipe 6 can be inserted into the center area of ​​the solid fermentation material; place the solid fermentation material to be dried into the drying oven 7, ensuring that the solid fermentation material is evenly spread, covering the anti-falling air plate 701 without blocking the air supply path of the air outlet pipe 6; if the solid fermentation material particles are too fine, a layer of gauze can also be covered on the anti-falling air plate 701. The gauze does not affect the air permeability and can also prevent the solid fermentation material particles from falling into the collection box 8.

[0043] When the hot air blower 1 is started, hot air is delivered in two separate streams through the first air duct 2 and the second air duct 3:

[0044] (1) First route: Hot air enters the collection box 8 through the first air supply pipe 2, and enters the bottom of the oven 7 through the ventilation holes on the anti-falling air plate 701. The baffles 702 on the ventilation holes are set in the manner of "same row and same direction, opposite row and opposite direction" to guide the hot air to form a uniform airflow at the bottom of the oven and heat the solid fermentation material from below.

[0045] (2) Second route: Hot air enters the air outlet pipe 6 through the second air supply pipe 3 and is directly sent to the solid fermentation center area by the air outlet pipe 6. It works in conjunction with the bottom hot air to form a heating cycle that links the upper and lower parts, ensuring that the solid fermentation material is heated evenly inside and out. The outer wall of the air outlet pipe 6 is evenly provided with exhaust holes to further ensure that the solid fermentation material is heated evenly.

[0046] The hot and humid air generated during solid-state fermentation inside the oven 7 rises and forms condensate upon contact with the condensing top plate 4 covering the top of the oven. The condensate flows along the side edge of the condensing top plate 4 into the condensing groove 17, and is then collected and discharged to the condensate collection point through the drain hole at the bottom of the groove and the first drain pipe 5, preventing condensate from dripping onto the surface of the solid-state fermentation material and causing contamination.

[0047] When the exhaust fan 15 is turned on, the odorous gas generated in the oven 7 is collected by the air intake hood 11 on the ceiling 10 under the action of the exhaust fan, and sent into the filter box 13 through the air intake pipe 12.

[0048] When the gas flows through the multi-layer filter plate 14 in the filter box 13, the adsorption layer (such as activated carbon particles) on the filter plate adsorbs odor components, and the purified gas is discharged into the atmosphere through the exhaust fan 15, reducing the diffusion of odor.

[0049] The small amount of condensate generated by gas condensation in the filter box 13 is discharged to the condensate collection point through the second drain pipe 16 at the bottom to avoid accumulation in the filter box.

Claims

1. A drying system for solid-state fermentation, characterized in that, The oven (7) includes a bottom anti-falling air plate (701), and a collection box (8) is provided below the anti-falling air plate (701). The side wall of the collection box (8) is connected to the air outlet of the hot air blower (1) through a first air duct (2). One end of the first air duct (2) is connected in parallel with one end of the second air duct (3). The other end of the second air duct (3) is detachably connected to one end of the air outlet pipe (6). The air outlet pipe (6) is located inside the oven (7). A condensing top plate (4) is also fixed on the second air duct (3). The condensing top plate (4) covers the top of the oven (7) but does not contact the oven (7).

2. The drying system for solid-state fermentation according to claim 1, characterized in that, The collection box (8) is also provided with several inspection holes (9) on its side wall.

3. The drying system for solid-state fermentation according to claim 1, characterized in that, The anti-falling material wind plate (701) has an array of ventilation holes, and each ventilation hole is fixedly provided with a baffle (702).

4. The drying system for solid-state fermentation according to claim 3, characterized in that, The notches of the baffles (702) are arranged in the same direction between columns and in opposite directions between columns.

5. The drying system for solid-state fermentation according to claim 1, characterized in that, The second air duct (3) is corrugated at one end near the air outlet duct (6) to adjust the height of the air outlet duct (6) inside the oven (7).

6. The drying system for solid-state fermentation according to claim 1, characterized in that, The side eaves of the condensing top plate (4) are provided with condensing grooves (17), and the bottom of the condensing grooves (17) is provided with drainage holes. The drainage holes are fixedly connected to one end of the first drain pipe (5), and the other end of the first drain pipe (5) is connected to the condensate collection point.

7. The drying system for solid-state fermentation according to claim 1, characterized in that, The oven (7) is suspended ceiling (10) above it. Several air inlet hoods (11) are provided on the suspended ceiling (10). The air outlet of the air inlet hood (11) is connected to the air inlet of the filter box (13) through an air inlet pipe (12). An exhaust fan (15) is provided on the air outlet pipe of the filter box (13). The air outlet of the exhaust fan (15) is connected to the atmosphere through a pipe.

8. The drying system for solid-state fermentation according to claim 7, characterized in that, The filter box (13) has several layers of filter plates (14) on the inner wall between the air inlet and the air outlet, and the filter plates (14) are provided with an adsorption layer.

9. The drying system for solid-state fermentation according to claim 7, characterized in that, The bottom of the filter box (13) is provided with a second drain pipe (16), and the other end of the second drain pipe (16) is connected to the condensate collection point.

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