Fermentation process and device for preparing and processing agricultural grain enzyme

Abstract

The invention discloses a fermentation process and device for preparing and processing agricultural grain enzymes, which are based on the traditional fermentation principle, mainly through the structural design of a stirring assembly and the design of the stirring operation mode of the stirring assembly, a reciprocating spiral shearing and stirring process from top to bottom and from bottom to top is carried out on a mixture of strains and grains, and in the stirring process, the mixture is uniformly stirred, so that the fermentation efficiency is improved. Air or oxygen is quantitatively introduced, gas is uniformly diffused into fermentation liquid up and down through the unique structure of the stirring assemblies, the fermentation dissolved oxygen amount is increased, in addition, when scum removal work needs to be carried out, in the process of lifting the stirring assemblies from bottom to top, the multiple groups of stirring assemblies are reversely driven to rotate circumferentially, the fermentation liquid enters the filtering cavities of the stirring assemblies through the openings to be filtered, and the fermentation efficiency is improved. And when the stirring assembly moves to the top of the fermentation tank, high-pressure gas is sprayed into the filter cavity through the air pump, so that the scum in the filter cavity is ejected outwards from the edge opening of the filter cavity, and the subsequent fermentation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fermentation processing, and more specifically, to a fermentation process and device for preparing and processing agricultural grain enzymes. Background Art

[0002] Agricultural grain enzyme is a product containing specific biologically active ingredients that is made from grains, fungi, etc., with or without the addition of auxiliary materials and through microbial fermentation. It has the functions of improving soil quality, promoting crop yield and quality, and preventing and controlling pests.

[0003] Traditional fermentation equipment is equipped with stirring blades to mix the raw materials. For example, publication number CN117946851A discloses a fermentation tank stirring device, which has multiple stirring blades on the stirring shaft to achieve a uniform stirring effect. Figure 2 It can be seen that the outer diameter of the stirring blade is limited and is separated from the inner wall of the tank by a certain distance, which greatly affects the stirring effect of the equipment. Secondly, the tank body has a closed structure with poor internal ventilation and low dissolved oxygen rate, which affects the activity of aerobic bacteria. In addition, it is difficult to discharge the waste gas generated during the fermentation process through only a single outlet.

[0004] In addition, during the aerobic fermentation process, aerobic bacteria will secrete some proteins, polysaccharides and other metabolites. Raw materials such as grains may contain a certain amount of fat and lipid substances. If the stirring is not sufficient, the grain raw materials may not be completely decomposed and converted. These incompletely decomposed grain particles and metabolites will be suspended in the fermentation liquid to form scum. The presence of the scum layer is prone to crusting, which can easily lead to a reduction in the effective volume of the fermentation tank.

[0005] Therefore, in order to solve the above problems, we proposed a fermentation process and device for the preparation and processing of agricultural grain enzymes. Summary of the invention

[0006] The purpose of the present invention is to solve the problems in the prior art of poor stirring performance of fermentation equipment, low dissolved oxygen content in a closed fermentation environment, and difficulty in treating scum generated during the fermentation process. A fermentation process and device for preparing and processing agricultural grain enzymes are now provided.

[0007] The object of the present invention can be achieved by the following technical scheme: a fermentation device for preparing and processing agricultural grain enzymes, comprising a fermentation tank and a filter tank arranged up and down, a stirring and air distribution structure is arranged inside the fermentation tank, a driving mechanism for lifting and lowering the stirring and air distribution structure is installed on the top of the fermentation tank, the stirring and air distribution structure comprises a lifting seat driven up and down by the driving mechanism, a rotating motor is fixedly installed inside the lifting seat, the driving end of the rotating motor passes through the lower end of the lifting seat and is fixedly connected to a rotating column, and a plurality of stirring components are annularly distributed on the outer end wall of the rotating column;

[0008] The stirring assembly includes a paddle fixed to the outer wall of a rotating column and inclined downward at one end, a rotary cutting cone is fixed to the inclined lower end of the paddle, and a filter cavity is opened inside the paddle, which is open at both ends of the other side avoiding the rotating column and the rotary cutting cone, and filter holes connected to the filter cavity are opened on the upper and lower end walls of the paddle. A plurality of air ducts connected to the inside of the filter cavity are embedded in the rotating column, and the rotating column is connected to an air pump installed on the top of a fixed sleeve through a connecting structure.

[0009] Furthermore, the driving mechanism includes a fixed sleeve fixedly installed on the top of the fermentation tank and coaxially arranged therewith, a toothed screw sleeve rotatably installed on the top of the fermentation tank is provided at the bottom inner side of the fixed sleeve, an external gear meshing with the toothed screw sleeve and a driving motor driving the external gear are installed on the outer side of the fixed sleeve, a lifting screw rod that penetrates the interior of the fermentation tank and is fixedly connected to the upper end of the lifting seat is threadedly sleeved on the inner side of the toothed screw sleeve, and guide rods that penetrate the inner wall of the fermentation tank and are fixedly connected to the upper end of the lifting seat are also provided on both sides of the toothed screw sleeve.

[0010] Furthermore, the paddle is a fan-shaped structure, and the outer end wall of the edge of the stirring component is arranged to fit the inner wall of the fermentation tank.

[0011] Furthermore, the upper and lower ends of the blade close to the inner wall of the fermentation tank are fixedly connected to side scraping strips that are arranged in close contact with the inner wall of the fermentation tank, and the upper and lower ends of the blade away from the rotary cutting cone are fixed with push pieces, and a plurality of defoaming strips are distributed on the side of the push piece that is inclined downward toward the blade.

[0012] Furthermore, the rotating column includes an upper column fixed on the driving end of the rotating motor and a lower column fixed on the lower end thereof and connected thereto, multiple groups of blades are distributed in a ring on the lower column, and multiple groups of inner ends of air guide tubes are fixed inside the lower column along a ring direction, and a vent is opened on the end wall of the upper column.

[0013] Furthermore, the connecting structure includes a rotary joint which is rotatably installed on the lower end of the lifting seat and movably sealed and sleeved on the outside of the lower column. An annular groove connected to the vent is provided inside the rotary joint, and a ventilation pipe is fixed to the outer end of the rotary joint, one end of which is connected to the annular groove and the other end of which passes through the lifting seat, the lifting screw and is connected to the air outlet end of the air pump.

[0014] Furthermore, a plurality of slag removal ports corresponding to the positions of the paddle blades are opened on the outer side of the top of the fermentation tank, and a sealing plate extending inward is fixed on one side of each slag removal port, and the inner ends of the plurality of sealing plates are commonly connected to a fixing ring which is coaxially arranged with the fermentation tank and has an outer diameter larger than the lifting seat.

[0015] Furthermore, a centrifugal drum is installed in the filter tank for rotational driving. The upper and lower ends of the centrifugal drum are respectively provided with an upper slurry discharge pipe connected to the interior of the fermentation tank and a lower slag discharge pipe penetrating to the bottom of the filter tank. A liquid discharge pipe is externally connected to one side of the bottom end of the filter tank.

[0016] The present invention also provides a fermentation process for preparing and processing agricultural grain enzymes, comprising the following steps:

[0017] Step 1: Pretreatment of grain raw materials;

[0018] Step 2: strain selection and activation;

[0019] Step 3, fermentation treatment: inoculate the activated bacteria into a fermentation tank containing grain raw materials, and drive the stirring and air distribution components to move up and down in the fermentation tank through the driving mechanism. At the same time, drive multiple groups of stirring components to rotate in a circle along the downward direction, and the multiple groups of stirring components perform reciprocating spiral shearing on the bacteria and grain mixture from top to bottom and from bottom to top;

[0020] In this process, the air pump is started to cause multiple groups of air guide tubes to quantitatively spray air or oxygen into the stirring assembly, and the gas diffuses from the filter cavity and filter holes up and down into the fermentation liquid, increasing the dissolved oxygen content in the mixture and destroying the foam structure through mechanical stirring;

[0021] Step 4, scum removal: when the stirring component moves from bottom to top, the air pump is in a closed state, and the rotary motor is driven in the reverse direction. At this time, the inner opening of the filter chamber faces upward. During the upward rotary cutting process of the stirring component in the spiral direction, the fermentation liquid enters the filter chamber through the opening, and the fermentation liquid is filtered out through the filter holes. The scum is intercepted in the filter chamber. When the stirring component moves to the top of the fermentation tank and corresponds to the positions of multiple scum removal ports one by one, high-pressure gas is sprayed into the filter chamber through the air pump, so that the scum in the filter chamber overflows from the side outlet of the filter chamber and the scum removal port;

[0022] Step 5: Centrifugal filtration: After the fermentation is completed, the fermentation liquid in the fermentation tank is continuously passed into the centrifugal drum through the upper slurry discharge pipe, and the fermentation liquid is centrifugally filtered under the high-speed centrifugal rotation of the centrifugal drum.

[0023] Compared with the prior art, the advantages of the present invention are:

[0024] 1. This scheme is based on the traditional fermentation principle. It mainly uses the structural design of the stirring component and the design of its stirring operation mode to carry out a reciprocating spiral shear stirring process from top to bottom and from bottom to top for the mixture of bacteria and grains. During the stirring process, air or oxygen is introduced quantitatively. The gas diffuses evenly into the fermentation liquid up and down through the unique structure of the stirring component to increase the dissolved oxygen content of the fermentation. In addition, when it is necessary to remove the scum, the stirring component is lifted from bottom to top, and multiple groups of stirring components are driven in reverse to rotate in a circle. The fermentation liquid enters the filter chamber through the opening, and the fermentation liquid is filtered out through the filter holes. The scum is intercepted in the filter chamber. When the stirring component moves to the top of the fermentation tank, high-pressure gas is sprayed into the filter chamber through the air pump, so that the scum in the filter chamber is caused to spray outward from the opening at the edge of the filter chamber, thereby improving the subsequent fermentation efficiency.

[0025] 2. Further explanation is given on the structure of the stirring component and the stirring operation mode. Multiple groups of blades are rotatably distributed on the rotating column and each end is tilted downward, driving the multiple groups of stirring components to rotate in a circle along the tilted downward direction. In this process, the rotary cutting cone located at the bottom plays a rotary cutting role on the fermentation liquid, while the pusher pieces located on the upper and lower sides of the rear play a spiral propulsion role on the fermentation liquid, promoting the mixing effect of the fermentation liquid, and in the ventilation process, the multiple groups of filter holes arranged above and below are conducive to the uniform diffusion of gas up and down. At this time, the pusher piece and multiple defoaming strips arranged behind the spiral propulsion direction are used to destroy the bubble structure, so that the microorganisms can obtain sufficient oxygen for metabolic activities and stabilize the fermentation environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0027] Figure 2 is a cross-sectional view of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the stirring and air distribution structure of the present invention;

[0029] Figure 4 This is a disassembled diagram of the stirring and air distribution structure of the present invention;

[0030] Figure 5 It is a cross-sectional view of the joint between the lifting seat and the ventilation structure of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of the stirring and air distributing structure of the present invention when performing rotary cutting motion in the fermentation tank;

[0032] Figure 7 It is a cross-sectional view of the present invention when the air guide pipe is used to supply air to multiple stirring components;

[0033] Figure 8 It is a schematic diagram of the structure of the stirring assembly of the present invention when performing rotary cutting and stirring work;

[0034] Fig. 9 It is a schematic diagram of the structure of the stirring assembly of the present invention when performing scum removal work;

[0035] Fig.10 It is a schematic structural diagram of the joint between the fermentation tank and a plurality of blocking plates of the present invention;

[0036] Fig.11 It is a schematic structural diagram of the present invention when the stirring and air distribution assembly is lifted to the top of the fermentation tank for slag removal.

[0037] Description of the markings in the figure:

[0038] 1. Fermentation tank; 101. Ventilation port; 102. Slag removal port; 2. Filter tank; 201. Drain pipe; 3. Fixed sleeve; 4. Lifting seat; 5. Lifting screw; 6. Toothed screw sleeve; 7. Stirring assembly; 71. Paddle; 711. Filter chamber; 712. Filter hole; 72. Peeling cone; 73. Side scraper; 74. Pusher; 741. Defoaming strip; 8. Rotary joint; 9. Rotating column; 91. Upper column; 92. Lower column; 10. Air guide tube; 11. Air pump; 12. Sealing plate; 13. Centrifugal drum; 14. Upper slurry discharge pipe; 15. Lower slag discharge pipe; 16. Collecting bag. DETAILED DESCRIPTION

[0039] The following will combine the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all the embodiments. All other embodiments obtained by ordinary technicians in this field without creative work based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0040] Example 1: Considering the poor stirring performance of the fermentation equipment in the prior art, the low dissolved oxygen content in the closed fermentation environment, and the difficulty in treating the scum generated during the fermentation process, the following technical solution is proposed:

[0041] The present invention discloses a fermentation device for preparing and processing agricultural grain enzymes. Figure 1 , Figure 2 , comprising a fermentation tank 1 and a filter tank 2 arranged up and down, a heat preservation and heating layer is arranged outside the fermentation tank 1 for keeping the fermentation environment relatively hot, a vent 101 is arranged on the top side of the fermentation tank 1, and a stirring and air distribution structure is arranged inside the fermentation tank 1;

[0042] A driving mechanism for lifting and lowering the stirring and air distribution structure is installed at the top of the fermentation tank 1. The stirring and air distribution structure includes a lifting seat 4 driven up and down by the driving mechanism. A rotating motor is fixedly installed inside the lifting seat 4. The driving end of the rotating motor passes through the lower end of the lifting seat 4 and is fixedly connected to a rotating column 9. A plurality of stirring components 7 are distributed in an annular manner on the outer end wall of the rotating column 9.

[0043] Among them, the driving mechanism includes a fixed sleeve 3 fixedly installed on the top of the fermentation tank 1 and arranged coaxially therewith, a toothed screw sleeve 6 rotatably installed on the top of the fermentation tank 1 is provided at the inner bottom of the fixed sleeve 3, an external gear meshing with the toothed screw sleeve 6 and a driving motor driving the external gear are installed on the outer side of the fixed sleeve 3, and the end wall of the toothed screw sleeve 6 is provided with gear teeth meshing with the external gear. The internal thread of the toothed screw sleeve 6 is sleeved with a lifting screw 5 that penetrates the interior of the fermentation tank 1 and is fixedly connected to the upper end of the lifting seat 4. Guide rods that penetrate the inner wall of the fermentation tank 1 and are fixedly connected to the upper end of the lifting seat 4 are also provided on both sides of the toothed screw sleeve 6. The toothed screw sleeve 6 is threadedly installed with the internal thread of the lifting screw 5. When the driving motor drives the toothed screw sleeve 6 to rotate in a circle, under the guiding and limiting action of a pair of guide rods, the lifting screw 5 drives the stirring and air distribution structure below to perform lifting and lowering movements in the vertical direction.

[0044] See also Figure 2-Figure 3 The stirring assembly 7 includes a paddle 71 fixed to the outer wall of the rotating column 9 and arranged at one end tilted downward, a rotary cutting cone 72 is fixed to the inclined lower end of the paddle 71, and a filter cavity 711 is opened inside the paddle 71, which is away from the rotating column 9 and the other two ends of the rotary cutting cone 72. The upper and lower end walls of the paddle 71 are both provided with filter holes 712 connected to the filter cavity 711;

[0045] The paddle 71 is a fan-shaped structure, and the outer end wall of the edge of the stirring component 7 is arranged in contact with the inner wall of the fermentation tank 1. The upper and lower ends of the paddle 71 close to the inner wall of the fermentation tank 1 are fixedly connected to the side scraping strips 73 arranged in contact with the inner wall of the fermentation tank 1, and the upper and lower ends of the paddle 71 away from the rotary cutting cone 72 are fixed with push pieces 74, and a plurality of defoaming strips 741 are distributed on the side of the push piece 74 inclined downward toward the paddle 71, and the defoaming strips 741 are distributed with defoaming serrations. When the defoaming strips 741 impact the fermentation liquid, on the one hand, the shearing effect on the fermentation liquid is improved, and on the other hand, the defoaming effect is improved.

[0046] See also Figure 4 , Figure 5A plurality of air guide tubes 10 connected to the inside of the filter chamber 711 are embedded in the rotating column 9. The rotating column 9 is connected to the air pump 11 installed on the top of the fixed sleeve 3 through a connecting structure. The connecting structure includes a rotating joint 8 rotatably installed at the lower end of the lifting seat 4 and movably sealed and sleeved with the outside of the lower column 92. An annular groove connected to the vent is provided inside the rotating joint 8, and a ventilation pipe is fixed at the outer end of the rotating joint 8, one end of which is connected to the annular groove and the other end of which passes through the lifting seat 4, the lifting screw 5 and is connected to the air outlet end of the air pump 11 in sequence. The rotating joint 8 is provided, which is conducive to not affecting the ventilation process during the continuous circular rotation of the multiple stirring components 7.

[0047] During the fermentation process, the activated bacteria are inoculated into the fermentation tank 1 containing the grain raw materials, see Figure 2 and Figure 6 , Figure 8 The driving mechanism drives the stirring and air distribution components to move up and down in the fermentation tank 1. At the same time, the rotary motor inside the lifting seat 4 is started to drive the multiple stirring components 7 to rotate in a circle along the downward direction, so as to perform a reciprocating spiral shear stirring process from top to bottom and from bottom to top on the mixture of bacteria and grains;

[0048] During this process, the rotary cutting cone 72 located at the bottom plays a rotary cutting role on the fermentation liquid, while the pushing pieces 74 located at the upper and lower sides at the rear play a spiral propulsion role on the fermentation liquid, thereby promoting the mixing effect of the fermentation liquid. The side scraping strips 73 arranged at the outer edge of the paddle 71 are used to scrape the fermentation liquid on the inner wall of the fermentation tank 1 with friction.

[0049] During the mixing process, please refer to Figure 7 , Figure 8 , air or oxygen is introduced in a quantitative manner, and the air or oxygen is sprayed into the fan-shaped filter cavity 711 through the air guide tube 10. The multiple groups of filter holes 712 arranged above and below are conducive to the uniform diffusion of gas up and down, thereby increasing the amount of dissolved oxygen in fermentation. At this time, the pushing piece 74 and the multiple defoaming strips 741 arranged behind the spiral propulsion direction are used to destroy the bubble structure, thereby enabling the microorganisms to obtain sufficient oxygen for metabolic activities and stabilize the fermentation environment.

[0050] When the stirring component 7 moves to the top of the fermentation tank 1 and is separated from the surface of the fermentation liquid, the stirring component 7 is continuously rotated to remove the bubbles attached to the upper part thereof from the fermentation liquid and cause them to burst.

[0051] See also Figure 2A centrifugal drum 13 is installed inside the filter tank 2 for rotational driving. The filter tank 2 is equipped with a rotating motor for rotationally driving the centrifugal drum. The upper and lower ends of the centrifugal drum 13 are respectively provided with an upper slurry discharge pipe 14 connected to the inside of the fermentation tank 1 and a lower slag discharge pipe 15 that penetrates to the bottom of the filter tank 2. A discharge pipe 201 is externally connected to one side of the bottom end of the filter tank 2. After fermentation is completed, the fermentation liquid in the fermentation tank 1 is continuously passed into the centrifugal drum 13 through the upper slurry discharge pipe 14. Under the high-speed centrifugal rotation of the centrifugal drum 13, the fermentation liquid is centrifugally filtered.

[0052] Embodiment 2: Based on Embodiment 1, this embodiment further improves the structure of the stirring component 7 and the stirring operation direction, so as to achieve the removal of scum in the fermentation liquid by stirring the gas distribution structure during the fermentation process, as follows:

[0053] See also Figure 9-11 , and the filter chamber 711 is provided with openings at both ends of the other side avoiding the rotating column 9 and the rotary cutting cone 72, a plurality of slag removal ports 102 corresponding to the positions of the paddle blades 71 are provided on the outer side of the top of the fermentation tank 1, a plurality of sealing plates 12 corresponding to the positions of the stirring components 7 are distributed in an annular manner at equal intervals on the top of the fermentation tank 1, and the outer ends of the sealing plates 12 are fixed to the inner wall of one side of the slag removal port 102, and the inner ends of the plurality of sealing plates 12 are commonly connected to a fixing ring which is coaxially arranged with the fermentation tank 1 and has an outer diameter larger than that of the lifting seat 4;

[0054] During the fermentation process, if the scum in the fermentation liquid needs to be cleaned regularly, when the stirring component 7 moves to the bottom of the fermentation tank 1, the stirring component 7 moves from bottom to top, the air pump 11 is in a closed state, and the rotary motor is driven in the reverse direction. At this time, the inner opening of the filter chamber 711 faces upward, and during the upward rotary cutting process of the stirring component 7 in the spiral direction, the fermentation liquid enters the filter chamber 711 through the opening, the fermentation liquid is filtered out through the filter hole 712, and the scum is intercepted in the filter chamber 711;

[0055] When the stirring assembly 7 moves to the top of the fermentation tank 1 and is close to the bottom of the slag removal port 102, the rotating motor in the lifting seat 4 is turned off, and the stirring assembly 7 only needs to be lifted upward so that the multiple groups of stirring assemblies 7 correspond to the multiple groups of slag removal ports 102 one by one. This process can be achieved by adjusting the stirring assembly 7 up and down and rotating the stirring assembly 7 until the inner opening of the stirring assembly 7 is sealed and docked with the fixed sealing plate 12, thereby completing the sealing of the inner opening of the stirring assembly 7. At this time, the side opening of the stirring assembly 7 is connected to the slag removal port 102, and high-pressure gas is sprayed into the filter chamber 711 through the air pump 11, so that the scum in the filter chamber 711 overflows from the side opening of the filter chamber 711 and the slag removal port 102, and a collecting bag 16 is added on the outside of the vent 101 to facilitate the collection of the scum, and the scum cleaning can be performed regularly and multiple times as needed.

[0056] In combination with Example 1 and Example 2, it can be seen that the present invention also proposes a fermentation process for preparing and processing agricultural grain enzymes, comprising the following steps:

[0057] Step 1: Pretreatment of grain raw materials: Select grains rich in nutrients such as protein and starch as raw materials, such as barley, wheat, oats, corn, etc., wash the raw materials, remove impurities and dust, and then soak them in warm water for a period of time to soften the grains and promote the action of enzymes in the subsequent fermentation process;

[0058] Step 2: strain selection and activation: select microbial strains that have the ability to efficiently degrade organic matter in grains, such as Bacillus subtilis, Bacillus amyloliquefaciens, yeast, etc., and inoculate the selected strains into a suitable culture medium for activation culture to restore the activity and proliferation ability of the strains;

[0059] Step 3, fermentation treatment: inoculate the activated bacteria into the fermentation tank 1 containing the grain raw materials, and drive the stirring and air distribution components to move up and down inside the fermentation tank 1 through the driving mechanism. At the same time, drive the multiple stirring components 7 to rotate in a circle along the downward direction, and the multiple stirring components 7 perform reciprocating spiral shearing on the bacteria and grain mixture from top to bottom and from bottom to top;

[0060] In this process, the air pump 11 is started, and the cooperation between the air pump 11 and the ventilation structure is used to cause the multiple groups of air guide pipes 10 to quantitatively spray air or oxygen into the stirring assembly 7, and the gas diffuses into the filter cavity 711, and diffuses into the fermentation liquid from the multiple filter holes 712 opened up and down, thereby increasing the dissolved oxygen content in the mixture, and destroying the foam structure through mechanical stirring;

[0061] Step 4, scum removal: when the stirring assembly 7 moves from bottom to top, the air pump 11 is in a closed state, and the rotary motor is driven in the reverse direction, and the multiple stirring assemblies 7 rotate in a circle in the inclined upward direction. At this time, the inner opening of the filter chamber 711 faces upward. During the upward rotary cutting process of the stirring assembly 7 in the spiral direction, the fermentation mixture enters the filter chamber 711 through the opening, and the fermentation liquid is filtered out through the filter holes 712 distributed up and down, and the scum is intercepted in the filter chamber 711. When the stirring assembly 7 moves to the top of the fermentation tank 1 and corresponds to the position of the scum removal port 102 one by one, the air pump 11 is used to spray high-pressure gas into the filter chamber 711, so that the scum in the filter chamber 711 overflows from the side opening of the filter chamber 711 and the scum removal port 102;

[0062] Step 5, centrifugal filtration treatment: After the fermentation is completed, the fermentation liquid in the fermentation tank 1 is continuously passed into the centrifugal drum 13 through the upper slurry discharge pipe 14. Under the action of high-speed centrifugal rotation of the centrifugal drum 13, the fermentation liquid is centrifugally filtered. The filter residue is intercepted in the centrifugal drum 13, and the fermentation liquid is thrown into the filter tank 2 through the filter holes on the centrifugal drum 13 and discharged from the discharge pipe 201 to obtain agricultural grain enzymes.

[0063] In summary: based on the traditional fermentation principle, mainly through the structural design of the stirring component and the design of its stirring operation mode, a reciprocating spiral shear stirring process is carried out from top to bottom and from bottom to top for the mixture of bacteria and grains, and during the stirring process, air or oxygen is quantitatively introduced, and the gas is evenly diffused into the fermentation liquid through the unique structure of the stirring component, thereby increasing the dissolved oxygen content of the fermentation. In addition, when it is necessary to remove the scum, during the process of lifting the stirring component from bottom to top, multiple groups of stirring components are driven in reverse to rotate in a circle, and the fermentation liquid enters the filter cavity of the stirring component through the opening for filtration, and the scum is intercepted in the filter cavity. When the stirring component moves to the top of the fermentation tank, high-pressure gas is sprayed into the filter cavity through the air pump, so that the scum in the filter cavity is ejected outward from the opening at the edge of the filter cavity, thereby improving the subsequent fermentation efficiency.

[0064] The above are only preferred specific implementation modes of the present invention; however, the protection scope of the present invention is not limited thereto; any technician familiar with the technical field within the technical scope disclosed by the present invention; any equivalent replacement or change based on the technical solution and improved concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A fermentation device for preparing and processing agricultural grain enzymes, comprising a fermentation tank (1) and a filter tank (2) arranged one above the other, characterized in that: The fermentation tank (1) is provided with a stirring and air distributing structure inside. A driving mechanism for lifting and lowering the stirring and air distributing structure is installed at the top of the fermentation tank (1). The stirring and air distributing structure comprises a lifting seat (4) driven up and down by the driving mechanism. A rotating motor is fixedly installed inside the lifting seat (4). The driving end of the rotating motor passes through the lower end of the lifting seat (4) and is fixedly connected to a rotating column (9). A plurality of stirring components (7) are distributed in an annular manner on the outer end wall of the rotating column (9); The stirring assembly (7) comprises a paddle (71) fixed to the outer wall of a rotating column (9) and having one end inclined downward, a rotary cutting cone (72) being fixed to the inclined lower end of the paddle (71), and a filter cavity (711) is provided inside the paddle (71) and is open at both ends of the other side away from the rotating column (9) and the rotary cutting cone (72), and filter holes (712) connected to the filter cavity (711) are provided on the upper and lower end walls of the paddle (71), and a plurality of groups of air guide pipes (10) connected to the inside of the filter cavity (711) are embedded and installed at the rotating column (9), and the rotating column (9) is connected to an air pump (11) installed at the top end of the fixed sleeve (3) through a connecting structure.

2. The fermentation device for preparing and processing agricultural grain enzymes according to claim 1, characterized in that: The driving mechanism comprises a fixed sleeve (3) fixedly mounted on the top of the fermentation tank (1); a toothed screw sleeve (6) rotatably mounted on the top of the fermentation tank (1) is provided at the bottom of the fixed sleeve (3); an external gear meshing with the toothed screw sleeve (6) and a driving motor driving the external gear are installed on the outside of the fixed sleeve (3); a lifting screw (5) penetrating into the interior of the fermentation tank (1) and fixedly connected to the upper end of the lifting seat (4) is internally threadedly sleeved on the toothed screw sleeve (6).

3. The fermentation device for preparing and processing agricultural grain enzymes according to claim 1, characterized in that: The upper and lower ends of the paddle (71) on the side close to the inner wall of the fermentation tank (1) are fixedly connected to side scraping strips (73) arranged in close contact with the inner wall of the fermentation tank (1), and the upper and lower ends of the paddle (71) on the side away from the rotary cutting cone (72) are fixed with pusher pieces (74), and a plurality of defoaming strips (741) are distributed on the side of the pusher piece (74) inclined downward toward the paddle (71).

4. The fermentation device for preparing and processing agricultural grain enzymes according to claim 3, characterized in that: The rotating column (9) comprises an upper column (91) fixed on the driving end of the rotating motor and a lower column (92) fixed on the lower end thereof and connected thereto, a plurality of groups of blades (71) are distributed in an annular manner on the lower column (92), and the inner ends of a plurality of groups of air guide tubes (10) are fixed in an annular direction inside the lower column (92), and a vent is provided on the end wall of the upper column (91).

5. The fermentation device for preparing and processing agricultural grain enzymes according to claim 4, characterized in that: The connecting structure comprises a rotary joint (8) rotatably mounted on the lower end of the lifting seat (4) and movably sealed and sleeved on the outside of the lower column (92); an annular groove connected to the vent is provided inside the rotary joint (8); and a vent pipe is fixed to the outer end of the rotary joint (8), one end of which is connected to the annular groove and the other end of which is connected to the outlet end of the air pump (11).

6. The fermentation device for preparing and processing agricultural grain enzymes according to claim 1, characterized in that: The top outer side of the fermentation tank (1) is provided with a plurality of slag removal openings (102) corresponding to the positions of the paddle blades (71), and a sealing plate (12) extending inward is fixed on one side of each slag removal opening (102).

7. The fermentation device for preparing and processing agricultural grain enzymes according to claim 1, characterized in that: A centrifugal drum (13) is installed in the filter tank (2) for rotational driving. The upper and lower ends of the centrifugal drum (13) are respectively provided with an upper pulp discharge pipe (14) connected to the inside of the fermentation tank (1) and a lower slag discharge pipe (15) penetrating to the bottom of the filter tank (2). A liquid discharge pipe (201) is externally connected to one side of the bottom end of the filter tank (2).

8. A fermentation process for preparing and processing agricultural grain enzymes, using a fermentation device for preparing and processing agricultural grain enzymes as described in any one of claims 1 to 7, characterized in that: The steps include: Step 1: Pretreatment of grain raw materials; Step 2: strain selection and activation; Step 3, fermentation treatment: inoculating the activated bacteria into a fermentation tank (1) containing grain raw materials, and driving the stirring and air distribution components to move up and down reciprocatingly through the driving mechanism. At the same time, driving the multiple stirring components (7) to rotate in a circle along the downward inclined direction, and the multiple stirring components (7) perform reciprocating spiral shearing on the bacteria and grain mixture from top to bottom and from bottom to top, so that the mixture forms a fermentation liquid; In this process, air or oxygen is quantitatively injected into the interior of the stirring assembly (7), and the gas diffuses upward and downward into the fermentation liquid through the plurality of filter holes (712), thereby increasing the amount of dissolved oxygen and destroying the foam structure through mechanical stirring; Step 4, scum removal treatment: when the stirring component (7) moves from bottom to top, the rotary motor is driven in the reverse direction. During the upward spiral cutting process of the stirring component (7), the fermentation liquid enters the filter chamber (711) through the inner opening for filtration, and the scum is intercepted in the filter chamber (711). When the stirring component (7) moves to the top of the fermentation tank (1), high-pressure gas is sprayed into the filter chamber (711) through the air pump (11) to push the scum outward; Step 5: Centrifugal filtration treatment: After the fermentation is completed, the fermentation liquid in the fermentation tank (1) is continuously passed through the upper slurry discharge pipe (14) into the centrifugal drum (13) for centrifugal filtration treatment.

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