Double-layer stacking fermentation system

Abstract

The utility model discloses a double-layer stacking fermentation system, which is characterized in that a discharge port of each yeast powder bin is respectively provided with a screw feeder, an outlet of each screw feeder is connected with an inlet of a yeast powder mixing machine, an outlet of the yeast powder mixing machine is connected with a feed port of an inoculation mixing machine, an outlet of a material chute is also connected with the feed port of the inoculation mixing machine; a discharge hole of the inoculation mixing machine is connected with a material distribution mechanism of the double-layer stacking disc fermentation machine through a conveying mechanism, an upper rotary material bed and a lower rotary material bed are arranged in the double-layer stacking disc fermentation machine, and radial augers capable of ascending and descending are respectively arranged above the two rotary material beds; discharging ports of the upper layer and the lower layer of the double-layer stacking disc fermentation machine are both connected with a feeding port of the grain spreading machine, a grain spreading conveying mesh belt is arranged in an inner cavity of the grain spreading machine, and a cooling air chamber is arranged below the grain spreading conveying mesh belt. According to the system, the occupied area can be greatly reduced, the labor cost is reduced, the productivity is improved, the workshop production environment is improved, and the quality and consistency of products are improved.

Description

Technical Field

[0001] The utility model relates to a fermentation system, in particular to a double-layer stacked fermentation system, belonging to the technical field of solid-state fermentation equipment and being used for the production of Maotai-flavor Baijiu (Chinese liquor). Background Technique

[0002] The brewing of Baijiu has a long history in China, and some traditional and effective brewing processes have been formed during the long-term production practice. Stacked fermentation is an indispensable typical process in the production of Maotai-flavor Baijiu, and it mainly has three purposes:

[0003] 1. Collecting microorganisms: This is the most fundamental purpose of stacked fermentation. By exposing the cooked grain and fermented grains to the open environment of the workshop, the originally moist and warm grain and fermented grains will naturally adsorb thermophilic microorganisms, some molds, and bacteria in the air, allowing them to attach to and reproduce on their surfaces. After the grain and fermented grains full of bacteria are further fermented in the cellar, it will significantly drive the "aroma generation and saccharification".

[0004] 2. Saccharification and fermentation: This is an important stage of stacked fermentation. The purpose of the whole stage is to saccharify and decompose the starch in the grain and fermented grains through the koji and the microorganisms collected by spreading the grains, and then make the fermentation process more perfect through the residues left by the production, reproduction, and even death of the microorganisms.

[0005] 3. Aroma generation: This is an important result of stacked fermentation. The purpose is to polymerize the products of stacked fermentation to improve the flavor and liquor yield of Maotai-flavor Baijiu. Polymers such as "ethyl acetate, ethyl hexanoate, and ethyl lactate" are the products after aroma generation. They can not only make the liquor body more mellow, sweet, and soft, but also increase the drinking taste at different stages, making the taste of new liquor more Maotai-flavored and aged.

[0006] With the development of Baijiu fermentation technology, some Luzhou-flavor Baijiu also adopt the process of adding stacked fermentation before fermentation in the fermentation pit. For example, the Chinese invention patent application with the publication number CN 117821188A proposes a method for stacking and fermenting fermented grains of Maotai-flavor distiller's grains. The method includes stacking the fermented grains into a conical fermented grain pile approximately in the shape of a hemisphere after cooking and mixing with koji. When piling up, the fermented grains are gradually sprinkled from the inside to the outside and from the bottom to the top. The first turning of the pile is carried out after stacking for 48 - 72 hours and when the top temperature of the pile reaches 35°C. By turning the pile, the problem of uneven temperature rise inside the stacked fermented grains is solved, the temperature rise uniformity is improved. At the same time, by controlling the shape and size parameters of the fermented grain pile, the liquor yield is increased, and the total acid, total ester, and content of tetramethylpyrazine in the liquor quality are also improved to a certain extent.

[0007] The technical solution and the existing technology have the following problems: 1. When inoculating high-temperature koji powder, medium-temperature koji powder, and low-temperature koji powder and mixing them with the cooked materials, manual weighing and adding are used with a platform scale, and then manual mixing is carried out; this method has a high labor intensity for workers, and the addition ratio is prone to errors (manual operation has a large workload, many varieties, and it is easy to miss adding or add repeatedly).

[0008] 2. During the manual operation process, manual temperature measurement, humidity measurement, and material turning are required, with a high labor intensity. Workers are prone to fatigue when working in a high-temperature and high-humidity working environment, and the operation is prone to errors.

[0009] 3. Since the traditional stacked fermentation materials are stacked in the fermentation workshop and the work is carried out in an open area, a large amount of water vapor is generated by the materials, and the workshop is filled with smoke, polluting the workshop environment. Summary of the Invention

[0010] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and the title of the present application, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0011] In view of the above and / or problems existing in the prior art, the present invention is proposed.

[0012] The purpose of the present invention is to overcome the problems existing in the prior art and provide a double-layer stacked fermentation system, which can realize the mechanization and standardization of the brewing operation process, greatly reduce the floor area, is beneficial to reducing labor costs, improving production capacity, improving the workshop production environment, and improving the quality and consistency of products.

[0013] To solve the above technical problems, the double-layer stacked fermentation system of the present invention includes a plurality of koji powder silos. The discharge ports of each koji powder silo are respectively provided with screw feeders. The outlets of each screw feeder are all connected to the inlet of a koji powder mixer. The outlet of the koji powder mixer is connected to the feed inlet of an inoculation mixer. The outlet of a material chute is also connected to the feed inlet of the inoculation mixer. The discharge outlet of the inoculation mixer is connected to the cloth feeding mechanism of a double-layer stacked disk fermenter through a conveying mechanism. The double-layer stacked disk fermenter is provided with upper and lower rotating beds, and radial augers capable of lifting are respectively arranged above the two rotating beds; the discharge ports of the upper and lower layers of the double-layer stacked disk fermenter are both connected to the feed inlet of a grain spreading machine. The inner cavity of the grain spreading machine is provided with a grain spreading conveyor belt, and a cooling air chamber is arranged below the grain spreading conveyor belt.

[0014] Further, the koji powder silos include a high-temperature koji powder silo, a medium-temperature koji powder silo, and a low-temperature koji powder silo. The material chute is a cooked material chute, and the rotation speeds of the screw feeders of each koji powder silo are controlled by the material flow of the cooked material chute.

[0015] Furthermore, the material distribution mechanism includes a mobile feed belt conveyor arranged corresponding to the upper and lower rotating material beds, and conveyor tracks extending radially to the outside of the fermentation machine are respectively provided above the two material layers of the double-layer stacked disc fermentation machine; the upper circumferential walls of the two material layers in the double-layer stacked disc fermentation machine are respectively provided with openable and closable feed doors, and the discharge ends of the two mobile feed belt conveyors can respectively pass through the corresponding feed doors and translate the material along the conveyor tracks.

[0016] Furthermore, the two rotating material beds are respectively evenly distributed with ventilation holes, the lower side wall of the lower rotating material bed is symmetrically provided with a fermentation machine air inlet, and the upper side wall of the upper material bed is symmetrically provided with a fermentation machine air outlet.

[0017] Furthermore, the two material layers of the double-layer stacked disc fermenter are respectively provided with a material turning mechanism that can be raised and lowered, and the material turning mechanism includes a plurality of material turning augers extending vertically, and each material turning augers is arranged radially along the rotating material bed.

[0018] Furthermore, the head end of the grain spreading conveyor mesh belt is located below the feed port of the grain spreading machine, and the tail end of the grain spreading conveyor mesh belt is located above the discharge port of the grain spreading machine; a plurality of cooling fans are installed along the length direction of the outer wall of the cooling air chamber, and the outlets of each cooling fan are respectively connected to the inner cavity of the cooling air chamber.

[0019] Furthermore, a plurality of scattering and flattening mechanisms for scattering and flattening the materials are provided above the upper layer of the grain conveying mesh belt.

[0020] Furthermore, a water cooling device is installed at the air inlet of the cooling fan near the discharge end.

[0021] Furthermore, the top cover and side walls of the stacked disc fermenter are respectively provided with hot water coils.

[0022] Furthermore, cleaning spray pipes are arranged above and below the rotating material bed respectively, and the inlets of the cleaning spray pipes are connected to high-pressure cleaning water pipes; and a sewage pipe is provided at the bottom of the stacked disc fermenter.

[0023] Furthermore, the top exhaust gas outlet of the grain spreading machine is connected to the air inlet of the washing tower.

[0024] Furthermore, the air outlet of the fermentation machine is connected to the air inlet of the washing tower.

[0025] Furthermore, the koji powder bin includes a high-temperature koji powder bin and a compound koji powder bin, the inlet of the compound koji powder bin is connected to the outlet of the mixed bran koji chute, the material chute is a post-distillation composite distiller's grains chute, and the speed of the screw feeder of each koji powder bin is controlled by the material flow rate of the post-distillation composite distiller's grains chute.

[0026] Compared with the prior art, the utility model has achieved the following beneficial effects: 1. First, the koji powder is proportioned by controlling the rotation speed of the discharging machine, and then enters the spiral mixer for mixing; the mixed koji powder after mixing is then mixed with the cooked materials or compound distiller's grains into another spiral mixer. The addition and mixing system is automated, with accurate addition ratio, uniform mixing, high mixing uniformity, and low labor intensity of workers;

[0027] 2. The disk fermenter is adopted to realize automatic humidity control, temperature control, automatic feeding, automatic discharging, automatic material turning, etc., reducing labor intensity and having stable fermentation quality;

[0028] 3. The automatically sealed disk fermenter is adopted, and the mist generated during the fermentation process is centrally discharged outdoors. A scrubbing tower can be used to purify the tail gas, purifying the workshop environment;

[0029] 4. The automatic disk fermenter is adopted. During ventilation, the workshop air is used, enabling the fermented materials to naturally inoculate environmental microorganisms, enriching the microbial population, enriching the varieties of the aroma and flavor of the liquor, and enriching the layering of the liquor;

[0030] 5. The automatic double-layer fermentation bed is adopted, improving production capacity, saving floor area, increasing the liquor production rate per unit area, and sharing a set of ventilation systems, saving the amount of ventilation air used;

[0031] 6. While inoculating high-temperature koji powder, medium-temperature koji powder, low-temperature koji powder or mixed bran koji, the workshop air with various microorganisms is inhaled during the fermentation process, accelerating starch gelatinization and saccharification, and improving fermentation efficiency. The products of polymerized stacking fermentation enhance the flavor and liquor production rate of Maotai-flavor liquor. Polymers such as "ethyl acetate, ethyl hexanoate, ethyl lactate" are the products after flavor generation. They can not only make the liquor body more mellow, sweet, soft, but also increase the drinking taste at different stages;

[0032] 7. It saves floor area and increases the liquor production rate per unit area; it is beneficial for the liquor brewing industry to change the production mode, achieve large-scale production through mechanization and intelligentization, and meet the standardization and consistency requirements of the food industry standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. The drawings are only for reference and illustration, not for limiting the present utility model. Among them:

[0034] Figure 1It is the flow chart of Embodiment 1 of the double-layer stacking fermentation system of the present utility model;

[0035] Figure 2 It is the enlarged view of the double-layer stacking disc fermenter of the present utility model;

[0036] Figure 3 It is the cloth feeding and wind direction diagram of the double-layer stacking disc fermenter of the present utility model;

[0037] Figure 4 It is the structural schematic diagram of the grain spreading machine of the present utility model;

[0038] Figure 5 It is the flow chart of Embodiment 2 of the double-layer stacking fermentation system of the present utility model;

[0039] In the figure: 1. High-temperature koji powder bin; 2. Medium-temperature koji powder bin; 3. Low-temperature koji powder bin; 4. Koji powder mixer; 5. Inoculation mixer; 6. Conveying mechanism; 7. Mobile feeding belt conveyor;

[0040] 8. Double-layer stacking disc fermenter; 8a. Rotary material bed; 8b. Radial auger; 8c. Auger lifting mechanism; 8d. Material turning mechanism; 8e. Material turning lifting mechanism; 8f. Conveyor track; 8g. Fermenter discharge port; 8h. Fermenter air inlet; 8j. Fermenter air outlet; 8k. Fan;

[0041] 9. Grain spreading machine; 9a. Grain spreading machine feeding port; 9b. Grain spreading conveyor net belt; 9c. Grain spreading machine discharge port; 9d. Cooling fan; 9e. Cooling air chamber; 9f. Grain spreading tail gas outlet; 9g. Scattering and leveling mechanism;

[0042] 10. Water cooling equipment; 11. Scrubbing tower; 12. Composite koji powder bin;

[0043] G1. High-temperature koji powder chute; G2. Medium-temperature koji powder chute; G3. Low-temperature koji powder chute; G4. Chute for cooked materials; G5. Hot water supply pipe; G6. Hot water return pipe; G7. Fresh air pipe; G8. Exhaust air pipe; G9. High-pressure cleaning water pipe; G10. Sewage pipe; G11. Refrigerant water supply pipe; G12. Refrigerant water return pipe; G13. Clean water pipe; G14. Composite distiller's grains chute; G15. Mixed bran koji chute. Detailed implementation manners

[0044] In the following description of the present utility model, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating that the device must have a specific orientation.

[0045] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific illustrations. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model. Embodiment

[0047] As Figures 1 to 3 shown, the double-layer stacking fermentation system of the present utility model includes a high-temperature koji powder bin 1, a medium-temperature koji powder bin 2, a low-temperature koji powder bin 3, a mobile feeding belt conveyor 7, a double-layer stacking disc fermenter 8 and a grain spreading machine 9. The outlet of the high-temperature koji powder chute pipe G1 is connected to the inlet of the high-temperature koji powder bin 1, the outlet of the medium-temperature koji powder chute pipe G2 is connected to the inlet of the medium-temperature koji powder bin 2, and the outlet of the low-temperature koji powder chute pipe G3 is connected to the inlet of the low-temperature koji powder bin 3.

[0048] Screw feeders are respectively provided at the discharge ports of the high-temperature koji powder bin 1, the medium-temperature koji powder bin 2 and the low-temperature koji powder bin 3. The outlets of each screw feeder are all connected to the inlet of the koji powder mixer 4. The outlet of the koji powder mixer 4 is connected to the feed inlet of the inoculation mixer 5. The outlet of the cooked material chute pipe G4 is also connected to the feed inlet of the inoculation mixer 5. The rotation speeds of each screw feeder are controlled by the material flow of the cooked material chute pipe G4, so that the koji powder and the cooked material are added in proportion.

[0049] The outlet of the inoculation mixer 5 is connected to the inlet of the conveying mechanism 6. The conveying mechanism 6 can be a belt conveyor set. The outlet of the conveying mechanism 6 is connected to the cloth feeding mechanism of the double-layer stacking disc fermenter 8. There are two upper and lower rotating beds 8a in the double-layer stacking disc fermenter 8. Radial augers 8b are respectively arranged above the two rotating beds 8a. The radial augers 8b can be lifted under the drive of the auger lifting mechanism 8c. The fermenter discharge ports 8g of the upper and lower layers of the double-layer stacking disc fermenter 8 are all connected to the grain spreading machine feed inlet 9a of the grain spreading machine 9.

[0050] Heating coils are arranged in the ceiling and circumferential wall of the double-layer stacking disc fermenter 8. The inlet of the heating coil is connected to the hot water supply pipe G5, and the outlet of the heating coil is connected to the hot water return pipe G6.

[0051] The cloth mechanism includes a moving feeding belt conveyor 7 corresponding to the upper and lower rotating material beds 8a. Conveyor tracks 8f extending radially to the outside of the fermenter are respectively provided above the two material layers of the double-layer stacked disk fermenter 8. Openable and closable feeding doors are respectively provided on the circumferential walls above the two material layers of the double-layer stacked disk fermenter 8. The discharge ends of the two moving feeding belt conveyors 7 can respectively pass through the corresponding feeding doors and translate for cloth feeding along the conveyor tracks 8f.

[0052] Ventilation holes are uniformly distributed on the two rotating material beds 8a respectively. Fermenter air inlets 8h are symmetrically provided on the side walls below the lower rotating material bed. The fresh air pipe G7 is connected to the inlet of the ventilator 8k, and the outlet of the ventilator 8k is connected to the fermenter air inlet 8h. Fermenter air outlets 8j are symmetrically provided on the side walls above the upper material layer. The outlet of the fermenter air outlet 8j is connected to the air outlet pipe G8.

[0053] Turning mechanisms 8d are respectively provided corresponding to the two material layers of the double-layer stacked disk fermenter 8. The turning mechanisms 8d can be lifted and lowered under the drive of the turning lifting mechanism 8e. The turning mechanisms 8d include a plurality of turning augers extending vertically, and each turning auger is arranged along the radial direction of the rotating material bed 8a. When the turning auger is inserted into the material layer, turning is carried out, and after turning is completed, it rises to a high position.

[0054] Cleaning spray pipes are arranged above and below the rotating material bed 8a respectively. The inlet of the cleaning spray pipe is connected to the high-pressure cleaning water pipe G9; a sewage discharge pipe G10 is provided at the bottom of the stacked disk fermenter, which is convenient for thoroughly cleaning the material bed when changing varieties.

[0055] The grain spreading tail gas outlet 9f at the top of the grain spreading machine 9 is connected to the air inlet of the scrubbing tower. The fermenter air outlet 8j can also be connected to the air inlet of the scrubbing tower. Two packing layers are provided in the middle of the scrubbing tower 11. Spray pipes are respectively provided above the two packing layers. The tail gas enters the inner cavity of the scrubbing tower 11 from the lower scrubbing air inlet, flows upward through the packing layer, and the scrubbing water sprayed from the spray pipe flows downward to wash the tail gas. A demisting layer is provided at the upper part of the scrubbing tower 11, and the demisted tail gas is discharged from the top outlet.

[0056] The circulating water falling to the bottom of the scrubbing tower 11 is pumped out by the scrubbing circulation pump and sent to the upper spray pipe for circulating spraying. A clear water pipe G13 is connected to the middle and lower side walls of the scrubbing tower 11. When the concentration of the circulating water is too high, sewage discharge is carried out, and clear water is supplemented through the clear water pipe G13.

[0057] As Figure 1 and Figure 4 shown, the grain spreading machine 9 is horizontal, and a grain spreading conveyor net belt 9b extending along the length direction of the grain spreading machine 9 is provided in its inner cavity. The head end of the grain spreading conveyor net belt 9b is located below the grain spreading machine feeding port 9a, and the tail end of the grain spreading conveyor net belt 9b is located above the grain spreading machine discharging port 9c.

[0058] A cooling air chamber is provided below the grain spreading conveyor mesh belt 9b, and a plurality of cooling fans 9d are installed on the outer wall of the cooling air chamber along the length direction, and the outlets of each cooling fan 9d are respectively connected to the inner cavity of the cooling air chamber; the grain spreading exhaust gas outlet 9f at the top of the grain spreading machine is connected to the air inlet of the washing tower 11.

[0059] A scattering and flattening mechanism 9g for scattering and flattening the material is arranged above the upper layer of the grain-spreading conveying mesh belt 9b, and a plurality of scattering and flattening mechanisms 9g are arranged along the length direction of the grain-spreading conveying mesh belt 9b.

[0060] The working process of this double-layer stacking fermentation system is as follows:

[0061] 1. Inoculation: After cooking, the material is provided with a continuous and stable flow by the previous section, i.e., the cooking section. High-temperature koji powder, medium-temperature koji powder, and low-temperature koji powder enter the corresponding koji powder bins respectively. Each koji powder bin has a vibrating discharger and a screw feeder at its outlet. When discharging, the three types of koji powder are set to the speed of each screw feeder in proportion, and are interlocked with the feeder speed of the cooking section to achieve proportional feeding, and then mixed evenly in the koji powder mixer 4. The evenly mixed koji powder and the cooking material enter the inoculation mixer 5 together for even mixing, completing the inoculation of the material.

[0062] 2. Distribution: The inoculated material is conveyed to the entrance of the automatic tee by the belt conveyor unit. According to the production arrangement, the automatic tee can distribute the material to the upper or lower mobile feeding belt conveyor 7 to feed the double-layer stacking disc fermenter 8. The double-layer stacking disc fermenter 8 is provided with a conveyor track 8f extending radially to the outside of the fermenter. The mobile feeding belt conveyor 7 enters the double-layer stacking disc fermenter 8 along the conveyor track 8f and distributes the material along the radial direction of the rotating material bed 8a. At the same time, the rotating material bed 8a rotates around its own axis, and the two cooperate to complete the uniform distribution of the material on the entire area of ​​the rotating material bed 8a.

[0063] The double-layer stacked disc fermenter 8 is provided with a radial auger 8b extending along the radius to help flatten the material so as to form a highly uniform material layer on the rotating material bed 8a.

[0064] After one layer of feeding is completed, the automatic tee will guide the material to the mobile feeding belt conveyor 7 of another layer to continue feeding.

[0065] 3. Fermentation: A hot water coil heating and heat preservation device is installed in the outer wall and ceiling of the double-layer stacked disc fermenter 8. Heating the ceiling can prevent condensation on the ceiling during the fermentation process, which affects the fermentation; heating the outer wall can heat the materials before the strain fermentation, thereby accelerating the fermentation speed. Before and during the feeding process, hot water is passed into the outer wall and ceiling of the double-layer stacked disc fermenter 8 to preheat the equipment and the fermentation materials and increase the temperature of the fermentation materials.

[0066] After the feeding is completed, the materials enter the fermentation process. During the fermentation process, if the measured oxygen consumption in the fermenter is low, the ventilator 8k can be turned on to supply air to the bottom of the lower rotating material bed. After the fresh air passes upward through the two material layers, it flows out from the air outlet 8j of the fermenter on the upper side wall.

[0067] When the measured material temperature is on the high side, the rotating material bed 8a can be rotated, and the material turning mechanism 8d can be lowered to the material turning position. At the same time, the fan is turned on for ventilation to cool the fermented materials. The fresh air first passes through the lower material layer, then continues to pass through the upper material layer, and is discharged from the upper side wall. After the cooling is completed, the material turning mechanism 8d can be raised, and the material turning mechanism 8d is disengaged from the contact with the fermented materials.

[0068] IV. Discharging: After the stacking fermentation, the purpose of collecting microorganisms, saccharification fermentation and flavor enhancement can be achieved. After the fermentation is completed, the radial auger 8b is turned on, and the radial auger 8b is gradually lowered to the bottom of the double-layer stacking disc fermenter 8. At this time, the disc is rotating, and the fermented materials are conveyed by the radial auger 8b to the discharge port 8g of the fermenter and discharged from the double-layer stacking disc fermenter 8.

[0069] V. Spreading and cooling the grains: The fermented materials enter from the feed inlet 9a of the grain spreading machine and fall on the feed end of the grain spreading conveyor belt 9b. The grain spreading conveyor belt 9b not only carries the materials and moves them towards the discharge end, but also forms a uniformly spread material layer of the materials on the grain spreading conveyor belt 9b.

[0070] During this process, each cooling fan 9d sends the cooling air into the cooling air chamber below the grain spreading machine 9, and passes upward through the spread materials, so that the materials are quickly cooled. The cooling tail gas is discharged from the grain spreading tail gas outlet 9f at the top of the grain spreading machine 9, enters the washing tower 11 for washing, and is discharged into the high altitude through the exhaust fan.

[0071] The feed end of the grain spreading machine 9 is cooled by the workshop air, and the discharge end is cooled by the air whose temperature is cooled by the water cooling equipment 10. The refrigerant water at about 10 °C enters the cold side of the air-water heat exchanger 10 through the refrigerant water supply pipe G11, is cooled to about 20 °C by the air, and cools the materials about to be discharged. The heated refrigerant water flows back to the refrigerant water system for circulation through the refrigerant water return pipe G12.

[0072] The cooled materials fall from the end of the grain spreading conveyor belt 9b and are discharged through the discharge port 9c of the grain spreading machine, and are conveyed to the next process by the conveying equipment. Embodiment

[0073] Such as Figure 5As shown in the figure, the double-layer stacking fermentation system of the present utility model includes a high-temperature koji powder bin 1 and a composite koji powder bin 12. The outlet of the high-temperature koji powder chute pipe G1 is connected to the inlet of the high-temperature koji powder bin 1, and the inlet of the composite koji powder bin 12 is connected to the outlet of the mixed bran koji chute pipe G15. The discharge ports of the high-temperature koji powder bin 1 and the composite koji powder bin 12 are respectively provided with screw feeders. The outlets of each screw feeder are all connected to the inlet of the koji powder mixer 4. The outlet of the koji powder mixer 4 is connected to the feed inlet of the inoculation mixer 5. The outlet of the composite distillers' grains chute pipe G14 after distillation is also connected to the feed inlet of the inoculation mixer 5. The composite distillers' grains after distillation are formed by evenly mixing distillers' grains and glutinous rice. The rotation speeds of each screw feeder are controlled by the material flow rate of the composite distillers' grains chute pipe G14 after distillation, so that the koji powder and the composite distillers' grains after distillation are added in proportion. The rest of the stacking fermentation process is the same as that of Embodiment 1.

[0074] The above are only the preferred and feasible embodiments of the present utility model, which show and describe the basic principles, main features and advantages of the present utility model. The patent protection scope of the present utility model is not limited thereby. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. Except for the above embodiments, without departing from the spirit and scope of the present utility model, the present utility model can also have other implementation manners. The present utility model will also have various changes and improvements. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present utility model. The protection scope required by the present utility model is defined by the appended claims and their equivalents. The technical features not described in the present utility model can be realized by or adopted from the prior art, and will not be elaborated herein.

Claims

1. A double-layer stacking fermentation system, comprising a plurality of koji powder bins, characterized in that: The discharge port of each koji powder bin is respectively provided with a screw feeder, and the outlet of each screw feeder is connected to the inlet of the koji powder mixer, the outlet of the koji powder mixer is connected to the feed port of the inoculation mixer, and the outlet of the material chute is also connected to the feed port of the inoculation mixer. The discharge port of the inoculation mixer is connected to the feeding mechanism of the double-layer stacked disc fermenter through a conveying mechanism, and the double-layer stacked disc fermenter is provided with an upper and lower rotating material bed, and radial augers that can be raised and lowered are respectively provided above the two rotating material beds; the discharge ports of the upper and lower layers of the double-layer stacked disc fermenter are both connected to the feed port of the grain spreading machine, the inner cavity of the grain spreading machine is provided with a grain spreading conveying mesh belt, and a cooling air chamber is provided below the grain spreading conveying mesh belt.

2. The double-layer stacking fermentation system according to claim 1, characterized in that: The koji powder bins include high-temperature koji powder bins, medium-temperature koji powder bins and low-temperature koji powder bins. The material chute is a post-cooking material chute. The speed of the screw feeder of each koji powder bin is controlled by the material flow rate of the post-cooking material chute.

3. The double-layer stacking fermentation system according to claim 1, characterized in that: The material distribution mechanism includes a movable feed belt conveyor arranged corresponding to the upper and lower rotating material beds, and conveyor tracks extending radially to the outside of the fermentation machine are respectively provided above the two material layers of the double-layer stacked disc fermentation machine; the upper circumferential walls of the two material layers in the double-layer stacked disc fermentation machine are respectively provided with openable and closable feed doors, and the discharge ends of the two movable feed belt conveyors can respectively pass through the corresponding feed doors and translate the materials along the conveyor tracks.

4. The double-layer stacking fermentation system according to claim 3, characterized in that: The two rotating material beds are respectively evenly distributed with ventilation holes, the lower side wall of the lower rotating material bed is symmetrically provided with fermentation machine air inlets, and the upper side wall of the upper material bed is symmetrically provided with fermentation machine air outlets.

5. The double-layer stacking fermentation system according to claim 3, characterized in that: The two material layers of the double-layer stacked disc fermenter are respectively provided with a material turning mechanism that can be raised and lowered. The material turning mechanism includes a plurality of material turning augers extending vertically, and each material turning augers is arranged radially along the rotating material bed.

6. The double-layer stacking fermentation system according to claim 1, characterized in that: The head end of the grain spreading conveyor mesh belt is located below the feed port of the grain spreading machine, and the tail end of the grain spreading conveyor mesh belt is located above the discharge port of the grain spreading machine; a plurality of cooling fans are installed along the length direction of the outer wall of the cooling air chamber, and the outlets of each cooling fan are respectively connected to the inner cavity of the cooling air chamber.

7. The double-layer stacking fermentation system according to claim 6, characterized in that: A plurality of scattering and flattening mechanisms for scattering and flattening the materials are arranged above the upper layer of the grain spreading conveying mesh belt.

8. The double-layer stacking fermentation system according to claim 6, characterized in that: A water cooling device is installed at the air inlet of the cooling fan near the discharge end.

9. The double-layer stacking fermentation system according to claim 1, characterized in that: The top cover and side walls of the stacked disc fermenter are respectively provided with hot water coils.

10. The double-layer stacking fermentation system according to claim 1, characterized in that: Cleaning spray pipes are arranged above and below the rotating material bed respectively, and the inlets of the cleaning spray pipes are connected to high-pressure cleaning water pipes; a sewage pipe is arranged at the bottom of the stacked disc fermenter.

11. The double-layer stacking fermentation system according to claim 1, characterized in that: The tail gas outlet at the top of the grain spreading machine is connected to the air inlet of the washing tower.

12. The double-layer stacking fermentation system according to claim 4, characterized in that: The air outlet of the fermentation machine is connected to the air inlet of the washing tower.

13. The double-layer stacking fermentation system according to claim 1, characterized in that: The koji powder bin includes a high-temperature koji powder bin and a compound koji powder bin. The inlet of the compound koji powder bin is connected to the outlet of the mixed bran koji chute. The material chute is a post-distillation composite distiller's grains chute. The speed of the screw feeder of each koji powder bin is controlled by the material flow rate of the post-distillation composite distiller's grains chute.

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