Seaweed fermentation device and fermentation method for fertilizer production

Abstract

The invention relates to the field of fertilizer production, in particular to a seaweed fermentation device for fertilizer production and a fermentation method. A stirring shaft is vertically and rotatably arranged on the supporting frame, the stirring shaft extends into the fermentation tank, and an anchor stirrer is arranged at the bottom of the stirring shaft; two ends of the connecting rod are respectively connected with the stirring shaft and the top of the anchor stirrer, and an auxiliary stirring plate is rotatably arranged on the connecting rod; the partition plate is horizontally arranged on the stirring shaft, an auxiliary power mechanism for driving the auxiliary stirring plate to deflect left and right is arranged on the partition plate and the supporting frame, and multiple stirring modes are formed by changing the left-right swinging speed of the auxiliary stirring plate and the rotating speed of the stirring shaft. According to the invention, each fermentation stage corresponds to different rotating speeds of the stirring shaft and left-right deflection speeds of the auxiliary stirring plate, and the auxiliary stirring plate deflects left and right, so that a relatively static fluid area between the anchor stirrer and the stirring shaft can be broken, and meanwhile, materials above can be drawn into circulation, so that the fermentation effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fertilizer production, and in particular to a seaweed fermentation device and a fermentation method for fertilizer production. Background Art

[0002] The application of seaweed fermentation equipment and fermentation method in fertilizer production is mainly to make full use of the nutrients in seaweed and produce seaweed biofertilizer through the fermentation of microorganisms. The production of seaweed fertilizer usually includes seaweed pretreatment, inoculation of microorganisms, fermentation, and finally filtering and drying the fermentation liquid. Stirring is required during the fermentation process to ensure full contact between microorganisms and seaweed.

[0003] A Chinese patent with announcement number CN106676282B discloses a waste aluminum smelting slag recovery device, including a slag picking device and a circulating water cooling platform; the slag picking device includes a stirring kettle, a stirring paddle and a motor for driving the stirring paddle, a stirring hole is opened at the center of the top of the stirring kettle, the stirring paddle passes through the stirring hole and is vertically set in the stirring kettle, a feed inlet is opened at the top of the stirring kettle, a feed hopper is correspondingly arranged on the feed inlet, a discharge port is opened at the bottom of the stirring kettle, and an aluminum slag filter hole is opened at the center of the bottom end of the stirring kettle.

[0004] However, the above-mentioned disclosed solutions have the following shortcomings: although the anchor agitator has a simple structure and is designed to fully stir the materials close to the tank wall, it is prone to have dead corners in the top and middle parts. Specifically, the top of the fermentation tank, especially above the agitator, may suffer from insufficient stirring because the stirring flow usually flows downward and the materials above may be difficult to be drawn into the circulation; due to the rotational flow of the fluid around the stirring shaft, a relatively static fluid area may be formed, resulting in a stirring dead corner. Summary of the invention

[0005] The purpose of the present invention is to address the problem that the anchor agitator structure used in kelp fermentation in the background technology is prone to forming stirring dead corners at the top and around the axis, making it difficult to fully stir, and to propose a seaweed fermentation device and fermentation method for fertilizer production.

[0006] In one aspect, the present invention provides a seaweed fermentation device for fertilizer production, comprising a fermentation tank, a discharge pipe is arranged at the bottom of the fermentation tank, and a feed pipe is arranged on the round wall of the fermentation tank; and further comprising:

[0007] A support frame, on which a stirring shaft is vertically and rotatably arranged, the stirring shaft extends into the fermentation tank, and an anchor stirrer is arranged at the bottom of the stirring shaft;

[0008] The connecting rod is arranged horizontally and its two ends are respectively connected to the stirring shaft and the top of the anchor stirrer. An auxiliary stirring plate is rotatably arranged on the connecting rod. The auxiliary stirring plate deflects left and right to form two states: vertical and inclined.

[0009] And a partition, the partition is horizontally arranged on the stirring shaft and located above the feed pipe, and an auxiliary power mechanism for driving the auxiliary stirring plate to deflect left and right is arranged on the partition and the support frame, and various stirring modes are formed by changing the left and right swing speed of the auxiliary stirring plate and the rotation speed of the stirring shaft.

[0010] Preferably, a main power mechanism for driving the stirring shaft to rotate is arranged on the support frame, and the main power mechanism is a motor and a gear transmission structure.

[0011] Preferably, the auxiliary power mechanism includes an auxiliary rotating assembly and an auxiliary power assembly. The auxiliary rotating assembly is used to drive the auxiliary stirring plate to deflect left and right, and the auxiliary power assembly serves as the power input of the auxiliary rotating assembly.

[0012] Preferably, the auxiliary rotating assembly includes a mounting seat arranged on the connecting rod, a rotating rod a rotatably arranged on the mounting seat, a fixed block arranged at the end of the rotating rod a, a rotating rod b vertically and rotatably arranged on the top of the mounting seat, a limiting frame arranged on the rotating rod b and for the auxiliary stirring plate to pass through, and a mating unit arranged on the partition to drive the rotating rod b to reverse at a certain angle.

[0013] Preferably, the matching unit includes a moving frame slidably arranged on the partition, and a driven gear c arranged on the top of the rotating rod b, and the moving frame is provided with a rack meshing with the driven gear c; a moving frame reset device is provided on the partition.

[0014] Preferably, a cylinder is arranged on the top of the fermentation tank, a rotating cylinder is arranged inside the cylinder and penetrates the cylinder, a stirring shaft passes through the rotating cylinder, a semicircular protrusion is arranged on the outer wall of the bottom of the rotating cylinder, and an auxiliary power assembly drives the rotating cylinder to rotate.

[0015] Preferably, a temperature monitoring interface, a pH monitoring interface, a dissolved oxygen monitoring interface and an aeration interface are provided on the fermentation tank.

[0016] In another aspect, the present invention provides a fermentation method of a seaweed fermentation device for fertilizer production, comprising the following steps:

[0017] S1. preparing seaweed raw materials, washing them to remove impurities, and then chopping or crushing them to increase the surface area;

[0018] S2, mixing seaweed, bacterial strains, water, and nutrient additives according to a set ratio, and adjusting the pH and temperature to the optimal growth requirements of microorganisms;

[0019] S3, fermentation is carried out, the dissolved oxygen content, temperature and pH are constantly monitored, and aerobic fermentation is carried out. According to the fermentation process, the fermentation is divided into three stages, namely, the initial stage, the middle stage and the late stage, and each stage corresponds to different stirring parameters;

[0020] S4. The fermentation time is 5-7 days. When the fermentation liquid shows uniform precipitation and the pH is stable, the fermentation is completed.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the fermentation tank;

[0024] Figure 3 and Figure 4 Both Figure 2 A partial structural diagram of

[0025] Figure 5 for Figure 4 A is an enlarged schematic diagram.

[0026] 1. Fermentation tank; 2. Discharge pipe; 3. Feed pipe; 4. Support frame; 5. Bearing seat; 6. Stirring shaft; 7. Motor a; 8. Driving gear a; 9. Anchor stirrer; 10. Connecting rod; 11. Partition plate; 12. Mounting seat; 13. Rotating rod a; 14. Fixed block; 15. Auxiliary stirring plate; 16. Rotating rod b; 17. Limiting frame; 18. Rotating cylinder; 19. Cylinder body; 20. Motor b; 21. Driving gear b; 22. Driven gear b; 23. Driven gear a; 24. Semicircular protrusion; 25. Moving frame; 26. Driven gear c; 27. Spring seat; 28. Spring; 29. ​​Rack; 30. Temperature monitoring interface; 31. pH monitoring interface; 32. Dissolved oxygen monitoring interface; 33. Aeration interface; 34. Pressure relief valve. DETAILED DESCRIPTION

[0027] Embodiment 1, as Figure 1-Figure 2 As shown, a seaweed fermentation device for fertilizer production proposed by the present invention comprises a fermentation tank 1, a discharge pipe 2 is arranged at the bottom of the fermentation tank 1, a discharge valve is arranged on the discharge pipe 2, a feed pipe 3 is arranged on the round wall of the fermentation tank 1, a flange is arranged at the feed end of the feed pipe 3, which is convenient for direct connection with external feeding equipment, and a pressure relief valve 34 is arranged on the top of the fermentation tank 1; and further comprises:

[0028] A support frame 4, on which a stirring shaft 6 is vertically and rotatably arranged, the stirring shaft 6 extends into the fermentation tank 1, and an anchor stirrer 9 is arranged at the bottom of the stirring shaft 6, and the anchor stirrer 9 is consistent with the shape of the inner wall of the fermentation tank 1, which can reduce the probability of the material adhering to the inner wall of the fermentation tank 1. In an optional embodiment, a bearing seat 5 is arranged on the support frame 4, and the top of the stirring shaft 6 is rotatably connected with the bearing seat 5 through a bearing;

[0029] The connecting rod 10 is horizontally arranged and its two ends are respectively connected to the stirring shaft 6 and the top of the anchor stirrer 9. The connecting rod 10 is rotatably provided with an auxiliary stirring plate 15, and the auxiliary stirring plate 15 deflects left and right to form two states of vertical and inclined;

[0030] And a partition 11, which is horizontally arranged on the stirring shaft 6 and located above the feed pipe 3. An auxiliary power mechanism for driving the auxiliary stirring plate 15 to deflect left and right is arranged on the partition 11 and the support frame 4. By changing the left and right swing speed of the auxiliary stirring plate 15 and the rotation speed of the stirring shaft 6, a variety of stirring modes are formed to cope with different stages of fermentation.

[0031] Furthermore, the fermentation tank 1 is provided with a temperature monitoring interface 30, a pH monitoring interface 31, a dissolved oxygen monitoring interface 32 and an aeration interface 33, which are used to install a temperature sensor, a pH sensor, a dissolved oxygen sensor and an aeration pipe respectively.

[0032] Embodiment 2, as Figure 1 As shown, the present invention proposes a seaweed fermentation device for fertilizer production. Compared with the first embodiment, this embodiment introduces in detail the structure of the main power mechanism used to drive the stirring shaft 6 to rotate.

[0033] The main power mechanism is arranged on the support frame 4. The main power mechanism is a motor and gear transmission structure. The main power mechanism includes a motor a7 arranged on the support frame 4, a driving gear a8 arranged on the output shaft of the motor a7, and a driven gear a23 arranged on the stirring shaft 6. The driven gear a23 is meshed with the driving gear a8.

[0034] Embodiment three, as Figure 3-Figure 5 As shown, the present invention proposes a seaweed fermentation device for fertilizer production. Compared with the second embodiment, this embodiment introduces the structure of the auxiliary power mechanism in detail.

[0035] The auxiliary power mechanism comprises an auxiliary rotating assembly and an auxiliary power assembly. The auxiliary rotating assembly is used to drive the auxiliary stirring plate 15 to deflect left and right, and the auxiliary power assembly serves as the power input of the auxiliary rotating assembly.

[0036] Furthermore, the auxiliary rotating assembly includes a mounting seat 12 arranged on the connecting rod 10, a rotating rod a13 rotatably arranged on the mounting seat 12, a fixed block 14 arranged at the end of the rotating rod a13, a rotating rod b16 vertically and rotatably arranged on the top of the mounting seat 12, a limiting frame 17 arranged on the rotating rod b16 and for the auxiliary stirring plate 15 to pass through, and a matching unit arranged on the partition 11 to drive the rotating rod b16 to rotate forward and reverse at a certain angle. The rotating rod b16 passes through the partition 11, and the auxiliary stirring plate 15 passes through the fixed block 14. The opening on the limiting frame 17 is larger than the horizontal cross-sectional size of the auxiliary stirring plate 15, so that the auxiliary stirring plate 15 can be deflected left and right.

[0037] Furthermore, the mating unit includes a moving frame 25 slidably set on the partition 11, and a driven gear c26 set on the top of the rotating rod b16, and the moving frame 25 is provided with a rack 29 meshing with the driven gear c26; a moving frame reset device is set on the partition 11, specifically, the moving frame reset device includes a spring seat 27 set on the partition 11, and a spring 28 set on the spring seat 27, and the spring 28 is connected to the moving frame 25. In an optional embodiment, the connecting rod 10, the auxiliary stirring plate 15, the auxiliary rotating assembly and the mating unit are each provided in two groups, the two connecting rods 10 are symmetrical about the stirring shaft 6, and the two auxiliary stirring plates 15 are respectively located at the middle position of the two connecting rods 10.

[0038] Further, a barrel 19 is arranged on the top of the fermentation tank 1, and a rotating barrel 18 is arranged inside and through the barrel 19, and the stirring shaft 6 passes through the rotating barrel 18. A semicircular protrusion 24 is arranged on the outer wall of the bottom of the rotating barrel 18, and the partition 11 rotates to drive the moving frame 25 to rotate and move outward when passing the position of the semicircular protrusion 24, and resets under the action of the resetting device after turning away from the semicircular protrusion 24, thereby driving the rotating rod b16 to rotate forward and reversely, and the rotating rod b16 drives the auxiliary stirring plate 15 to deflect left and right through the limit frame 17, and the auxiliary power assembly drives the rotating barrel 18 to rotate. Specifically, the auxiliary power assembly includes a motor b20 arranged on the support frame 4, a driving gear b21 arranged on the output shaft of the motor b20, and a driven gear b22 arranged on the outer peripheral wall of the rotating barrel 18, and the driven gear b22 is meshed with the driving gear b21. In an optional embodiment, a bearing is arranged between the stirring shaft 6 and the rotating barrel 18, and a bearing is arranged between the rotating barrel 18 and the barrel 19.

[0039] Embodiment 4, a method for fermenting seaweed for fertilizer production proposed by the present invention, adopts the seaweed fermentation device for fertilizer production of embodiment 3, and specifically comprises the following steps:.

[0040] S1. Prepare fresh or dried seaweed raw materials, wash them to remove impurities, and then chop or crush them to increase the surface area, which is conducive to the decomposition of microorganisms;

[0041] S2, mixing seaweed, bacterial strains, water, and nutrient additives according to a set ratio, and adjusting the pH and temperature to the optimal growth requirements of microorganisms;

[0042] S3, fermentation, always monitor the dissolved oxygen, temperature and pH, aerobic fermentation, fermentation is divided into three stages according to the fermentation process, namely, initial stage, middle stage and late stage, each stage corresponds to different stirring parameters, the initial stage of fermentation is 0-24 hours, the temperature is maintained at 25-30 ° C, the pH is maintained at 6.5-7.5, the oxygen demand is high, the stirring shaft 6 speed is 150-200rpm, the rotating drum 18 speed is 40-60rpm; the middle stage of fermentation is 24-72 hours, the temperature is maintained at 30-35 ° C, ... H is maintained at 6.0-7.0, the oxygen demand is medium, the speed of the stirring shaft 6 is 100-150rpm, and the speed of the rotating drum 18 is 20-30rpm; the late fermentation period is after 72 hours, the temperature is maintained at 35-40°C, the pH is maintained at 5.5-6.5, the oxygen demand is low, the speed of the stirring shaft 6 is 50-100rpm, and the rotating drum 18 stops rotating. The dissolved oxygen content needs to be monitored at all times in the three fermentation stages to maintain the dissolved oxygen content at 2-5mg / L. When the dissolved oxygen content is lower than 2mg / L, aeration is added to the fermentation tank 1;

[0043] S4. The fermentation time is 5-7 days. When the fermentation liquid shows uniform precipitation and the pH is stable, the fermentation is completed.

[0044] In summary, when the present invention is in use, the fermentation material enters the fermentation tank 1 through the feed pipe 3, and then the feed pipe 3 is closed, and the pH and temperature are adjusted to the optimal growth requirements of the microorganisms, and then the motor a7 and the motor b20 are controlled to work through the set control system. The control system also needs to receive data collected by the temperature sensor, the pH sensor and the dissolved oxygen sensor, and divide the fermentation into three fermentation stages: early, middle and late. Each fermentation stage corresponds to a different rotation speed of the stirring shaft 6 and a left and right deflection speed of the auxiliary stirring plate 15. When the anchor stirrer 9 stirs quickly, the stirring effect is good. The left and right deflection of the auxiliary stirring plate 15 can break the relatively static fluid area between the anchor stirrer 9 and the stirring shaft 6, and at the same time, the material above can be drawn into the circulation, thereby ensuring that the materials at various positions in the fermentation tank 1 can be fully mixed, thereby improving the fermentation effect.

[0045] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A seaweed fermentation device for fertilizer production, comprising a fermentation tank (1), wherein a discharge pipe (2) is arranged at the bottom of the fermentation tank (1); characterized in that: Also includes: A support frame (4), a stirring shaft (6) is vertically and rotatably arranged on the support frame (4), the stirring shaft (6) extends into the fermentation tank (1), and an anchor stirrer (9) is arranged at the bottom of the stirring shaft (6); The connecting rod (10) is arranged horizontally and its two ends are respectively connected to the stirring shaft (6) and the top of the anchor stirrer (9); an auxiliary stirring plate (15) is rotatably arranged on the connecting rod (10); the auxiliary stirring plate (15) deflects left and right to form two states: vertical and inclined; and a partition (11), the partition (11) being horizontally arranged on the stirring shaft (6) and being located above the feed pipe (3), the partition (11) and the support frame (4) being provided with an auxiliary power mechanism for driving the auxiliary stirring plate (15) to deflect left and right, and a variety of stirring modes are formed by changing the left and right swing speed of the auxiliary stirring plate (15) and the rotation speed of the stirring shaft (6).

2. The seaweed fermentation device for fertilizer production according to claim 1, characterized in that: A main power mechanism for driving the stirring shaft (6) to rotate is arranged on the support frame (4), and the main power mechanism is a motor and a gear transmission structure.

3. The seaweed fermentation device for fertilizer production according to claim 1, characterized in that: The auxiliary power mechanism comprises an auxiliary rotating assembly and an auxiliary power assembly. The auxiliary rotating assembly is used to drive the auxiliary stirring plate (15) to deflect left and right, and the auxiliary power assembly serves as the power input of the auxiliary rotating assembly.

4. The seaweed fermentation device for fertilizer production according to claim 3, characterized in that: The auxiliary rotating assembly comprises a mounting seat (12) arranged on the connecting rod (10), a rotating rod a (13) rotatably arranged on the mounting seat (12), a fixing block (14) arranged at the end of the rotating rod a (13), a rotating rod b (16) vertically and rotatably arranged on the top of the mounting seat (12), a limiting frame (17) arranged on the rotating rod b (16) and for the auxiliary stirring plate (15) to pass through, and a matching unit arranged on the partition plate (11) and driving the rotating rod b (16) to rotate forward and reverse at a certain angle.

5. The seaweed fermentation device for fertilizer production according to claim 4, characterized in that: The matching unit comprises a moving frame (25) slidably arranged on the partition (11), and a driven gear c (26) arranged on the top of the rotating rod b (16); the moving frame (25) is provided with a rack (29) meshing with the driven gear c (26); and the partition (11) is provided with a moving frame reset device.

6. The seaweed fermentation device for fertilizer production according to claim 5, characterized in that: A barrel (19) is arranged on the top of the fermentation tank (1), a rotating barrel (18) is arranged inside the barrel (19) and passes through the rotating barrel (18), a stirring shaft (6) passes through the rotating barrel (18), a semicircular protrusion (24) is arranged on the outer wall of the bottom of the rotating barrel (18), and an auxiliary power component drives the rotating barrel (18) to rotate.

7. The seaweed fermentation device for fertilizer production according to claim 6, characterized in that: The fermentation tank (1) is provided with a temperature monitoring interface (30), a pH monitoring interface (31), a dissolved oxygen monitoring interface (32) and an aeration interface (33).

8. A method for fermenting seaweed for fertilizer production, using the seaweed fermentation device for fertilizer production according to claim 7, characterized in that: The following steps are involved: S1. preparing seaweed raw materials, washing them to remove impurities, and then chopping or crushing them to increase the surface area; S2, mixing seaweed, bacterial strains, water, and nutrient additives according to a set ratio, and adjusting the pH and temperature to the optimal growth requirements of microorganisms; S3, fermentation is carried out, the dissolved oxygen content, temperature and pH are constantly monitored, and aerobic fermentation is carried out. According to the fermentation process, the fermentation is divided into three stages, namely, the initial stage, the middle stage and the late stage, and each stage corresponds to different stirring parameters; S4. The fermentation time is 5-7 days. When the fermentation liquid shows uniform precipitation and the pH is stable, the fermentation is completed.

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