A fermentation tank for seaweed fertilizer production and a method for preparing seaweed fertilizer

Abstract

The invention relates to the technical field of fertilizer processing, and in particular to a fermentation tank for producing seaweed fertilizer, comprising a fermentation tank, wherein the fermentation tank comprises a tank body and a tank cover, wherein a floating stirring assembly and a rotary aeration assembly are arranged in the tank body, wherein a driving mechanism and an exhaust pipe are arranged on the tank cover, wherein the driving mechanism comprises a spline rotating shaft, the floating stirring assembly comprises a stirring mechanism and a floating mechanism, wherein the stirring mechanism comprises a plurality of stirring paddles, the floating mechanism comprises an annular floating plate, the rotary aeration assembly comprises a driven rotating shaft, a stirring mechanism and an aeration mechanism, wherein a No. 1 branch pipe is arranged on the exhaust pipe, wherein a pneumatic valve is arranged on the No. 1 branch pipe, wherein when the aeration mechanism releases oxygen into the tank body, the stirring mechanism stirs the seaweed residue settled at the bottom of the tank body, and then the oxygen sprayed from the aeration mechanism carries the seaweed residue up together, and when the seaweed residue rises, the seaweed residue and fermentation liquid are fully stirred by the stirring mechanism, thereby improving the fermentation rate of the seaweed.

Description

Technical Field

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

[0002] Seaweed fertilizer is a kind of fertilizer produced and processed from marine brown algae, or processed with a certain amount of nitrogen, phosphorus, potassium and trace elements. Seaweed fertilizer is rich in more than 40 minerals such as potassium, calcium, magnesium, iron, zinc, iodine, and a variety of natural plant growth regulators, such as auxin, gibberellin, cytokinin, etc. It has high physiological activity. There are many methods for producing seaweed fertilizer, including immersion fermentation, dynamic fermentation, high temperature treatment and enzymatic extraction. These methods can effectively extract organic matter from seaweed and make fertilizer.

[0003] The existing Chinese patent with publication number CN114478093A discloses a fertilizer rapid fermentation device, but the patent also has the following defects:

[0004] First, during the soaking and fermentation process of seaweed fertilizer, the seaweed and the fermentation liquid need to be fully stirred. Since the amount of seaweed and fermentation liquid injected into the fermentation tank is different each time, and the height position of the traditional stirring mechanism in the tank body is fixed, when the liquid level in the tank body does not exceed the stirring mechanism, the stirring mechanism cannot stir the seaweed and fermentation liquid in the tank body;

[0005] Secondly, after the seaweed and fermentation liquid are injected into the tank, the seaweed residue will settle to the bottom of the tank due to gravity. Since the traditional stirring mechanism can only stir the seaweed residue but cannot drive the seaweed residue to rise, the seaweed residue that has settled at the bottom of the tank for a long time cannot be fully stirred with the fermentation liquid, which ultimately leads to a low fermentation rate of the seaweed.

[0006] Therefore, it is necessary to provide a kind of seaweed fertilizer production fermentation tank and seaweed fertilizer preparation method to solve the above problems. Summary of the invention

[0007] Based on this, it is necessary to provide a fermentation tank for seaweed fertilizer production and a method for preparing seaweed fertilizer in response to the existing technical problems.

[0008] In order to solve the problems of the prior art, the technical solution adopted by the present invention is as follows: a fermentation tank for producing seaweed fertilizer, comprising a fermentation tank arranged vertically, the fermentation tank comprising a tank body and a tank cover arranged on the top of the tank body, a feed pipe is arranged on the outer wall of the tank body, a discharge pipe is arranged at the bottom of the tank body, a floating stirring assembly and a rotary aeration assembly are arranged in the tank body, the rotary aeration assembly is arranged at the inner bottom of the tank body, the floating stirring assembly is located above the rotary aeration assembly, a driving mechanism and an exhaust pipe are arranged on the tank cover, the driving mechanism comprises a spline shaft vertically penetrating downward into the tank body, the floating stirring assembly comprises a stirring mechanism and a floating mechanism, the floating mechanism is located above the stirring mechanism, and the stirring mechanism It includes a plurality of stirring paddles, the spline shaft is used to drive the plurality of stirring paddles to rotate while revolving, the floating mechanism includes an annular floating plate, the plurality of stirring paddles are connected to the annular floating plate, the rotary aeration assembly includes a driven shaft, a stirring mechanism and an aeration mechanism, the stirring mechanism is connected to the spline shaft through the driven shaft, the aeration mechanism is connected to the stirring mechanism, the stirring mechanism is used to stir the seaweed residue sunk to the bottom of the tank body, the aeration mechanism is used to release oxygen into the tank body, a branch pipe No. 1 is provided on the exhaust pipe, a pneumatic valve is provided on the branch pipe No. 1, when oxygen is not injected into the tank body, the branch pipe No. 1 is in an open state, after the oxygen is injected into the tank body, the pneumatic valve closes the branch pipe No. 1.

[0009] Furthermore, the driving mechanism also includes a motor vertically fixed on the tank cover, the upper end of the spline shaft is coaxially fixedly connected to the output end of the motor, the driven shaft is coaxially fixedly connected to the lower end of the spline shaft, and the stirring mechanism includes a plurality of inclined scrapers evenly distributed along the circumferential direction of the driven shaft, one end of each inclined scraper is fixedly connected to the driven shaft, and one side of each inclined scraper is inclined downward to fit the inner bottom of the tank body.

[0010] Furthermore, the aeration mechanism includes a plurality of aeration tubes corresponding one-to-one with the inclined scrapers, each aeration tube is fixed on the corresponding inclined scraper, a ventilation joint is fixedly provided at the bottom of the tank body, a swivel joint is provided at the upper end of the ventilation joint, the swivel joint includes a swivel head and a connecting head, the connecting head is coaxially fixed to the upper end of the ventilation joint, the swivel head rotates at the upper end of the connecting head, and the swivel head is coaxially fixed to the lower end of the driven rotating shaft, vertical ventilation grooves are coaxially provided in the swivel head and the connecting head, a plurality of connecting nozzles corresponding one-to-one with the aeration tubes are provided on the outer wall of the swivel head, each connecting nozzle is connected to the ventilation groove in the swivel head, and one end of each aeration tube is fixedly connected to the corresponding connecting nozzle.

[0011] The cam is an airtight container, and the cam is secured to the interior of the container with an angular channel formed between the end portions of the cam and the exterior of the container, wherein the cam is secured to the interior of the container with an angular channel formed between the end portions of the cam and the exterior of the container.

[0012] Furthermore, a sliding sleeve is provided on the spline shaft, and the spline shaft coaxially passes through the sliding sleeve. The floating mechanism also includes a connecting hub fixed on the inner ring of the annular floating plate. The upper end fixed sleeve of the sliding sleeve is provided with a bearing. The stirring mechanism is arranged at the lower end of the sliding sleeve. The center of the connecting hub is fixedly connected to the outer ring of the bearing. A plurality of limit strips evenly distributed along the circumferential direction of the annular floating plate are formed at the outer edge of the annular floating plate. Each limit strip is vertical. A plurality of limit grooves matching the limit strips are opened on the inner wall of the tank body. A limit convex ring for limiting the downward movement of the sliding sleeve is formed on the outer wall of the lower end of the spline shaft.

[0013] Furthermore, the stirring mechanism also includes a gear ring and a plurality of bevel gears corresponding to the stirring paddles one by one. The gear ring is arranged outside the sliding sleeve. The gear ring is fixed to the bottom of the connecting hub through a plurality of vertical rods. The axial direction of each stirring paddle is perpendicular to the axial direction of the sliding sleeve, and each stirring paddle rotates on the outer wall of the sliding sleeve. Each bevel gear is coaxially fixed to the corresponding stirring paddle, and each bevel gear is meshed with the gear ring.

[0014] Furthermore, a No. 1 rotary valve is provided on the feed pipe, a No. 2 rotary valve is provided on the discharge pipe, a No. 2 branch pipe and a pressure gauge are provided on the exhaust pipe, and a No. 3 rotary valve is provided on the No. 2 branch pipe.

[0015] A method for preparing seaweed fertilizer, the method comprising the following steps:

[0016] S1, mixing seaweed and fermentation liquid, and injecting the mixed liquid into the tank through a feed pipe;

[0017] S2, introducing oxygen into the aeration mechanism;

[0018] S3, stirring the seaweed residue sunk at the bottom of the tank body by a stirring mechanism;

[0019] S4, the annular floating plate rises together with the liquid level in the tank body, and the seaweed residue and the fermentation liquid are fully stirred by the stirring mechanism connected to the annular floating plate;

[0020] S5, the seaweed is fermented to form fertilizer liquid, and the fertilizer liquid is discharged through a discharge pipe.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] Firstly, the stirring mechanism of the device is connected to the floating mechanism. When the liquid level in the tank rises, the annular floating plate will drive the stirring mechanism to rise together, thereby ensuring that the stirring mechanism is always located below the highest liquid level in the tank, preventing the stirring mechanism from being unable to stir the seaweed and the fermentation liquid;

[0023] Secondly, when the aeration mechanism releases oxygen into the tank, the stirring mechanism will stir the seaweed residue settled at the bottom of the tank, so the oxygen sprayed from the aeration mechanism will carry the seaweed residue up together. When the seaweed residue rises, the stirring mechanism will fully stir the seaweed residue and the fermentation liquid, thereby improving the fermentation rate of the seaweed residue;

[0024] Third, when oxygen is introduced into the aeration mechanism, the pneumatic valve will block branch pipe No. 1 to prevent the oxygen in the tank from being discharged, ensuring that there is enough oxygen in the tank for the seaweed to ferment. When the seaweed ferments, it will generate heat and gas. When the temperature in the tank is too high, the pneumatic valve will open branch pipe No. 1 to control the temperature in the tank to drop to the standard temperature range for seaweed fermentation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the three-dimensional structure of the embodiment Figure 1 ;

[0026] Figure 2 Schematic diagram of the three-dimensional structure of the embodiment Figure 2 ;

[0027] Figure 3 It is a three-dimensional structural schematic diagram of the floating stirring component and the rotating aeration component;

[0028] Figure 4 is a top view of an embodiment;

[0029] Figure 5 yes Figure 4 Section view along line AA;

[0030] Figure 6 yes Figure 5 A1 is a partial enlarged schematic diagram;

[0031] Figure 7 yes Figure 5A2 is a partial enlarged schematic diagram;

[0032] Figure 8 yes Figure 5 A3 is a partial enlarged schematic diagram;

[0033] Fig. 9 yes Figure 5 A4 is a partial enlarged schematic diagram;

[0034] Fig.10 yes Figure 5 A partial enlarged schematic diagram indicated by A5;

[0035] Fig.11 is a side view of a pneumatic valve;

[0036] Fig.12 yes Fig.11 Sectional view along line BB;

[0037] Fig.13 It is a three-dimensional structural exploded diagram of the pneumatic valve;

[0038] Fig.14 It is a three-dimensional structural schematic diagram of the floating stirring assembly;

[0039] Fig.15 It is a three-dimensional structural schematic diagram of the rotary aeration component.

[0040] The numbers in the figure are: 1, tank body; 2, tank cover; 3, feed pipe; 4, discharge pipe; 5, floating stirring assembly; 6, rotary aeration assembly; 7, exhaust pipe; 8, spline shaft; 9, stirring paddle; 10, annular floating plate; 11, driven shaft; 12, branch pipe No. 1; 13, pneumatic valve; 14, motor; 15, inclined scraper; 16, aeration pipe; 17, ventilation joint; 18, rotary joint; 19, rotary head; 20, connector; 21, ventilation groove; 22, connecting nozzle; 23, valve pipe; 24, valve pin; 25, spring Spring; 26, hollow circular plate; 27, air outlet; 28, exhaust port; 29, columnar head; 30, square rod; 31, notch; 32, arc baffle; 33, baffle ring; 34, connecting pipe; 35, air inlet pipe; 36, sliding sleeve; 37, connecting hub; 38, bearing; 39, limit strip; 40, limit groove; 41, limit convex ring; 42, gear ring; 43, bevel gear; 44, vertical rod; 45, No. 1 rotary valve; 46, No. 2 rotary valve; 47, No. 2 branch pipe; 48, pressure gauge; 49, No. 3 rotary valve. DETAILED DESCRIPTION

[0041] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] refer to Figures 1 to 15 A fermentation tank for seaweed fertilizer production shown in the figure comprises a fermentation tank arranged vertically, the fermentation tank comprises a tank body 1 and a tank cover 2 arranged on the top of the tank body 1, a feed pipe 3 is arranged on the outer wall of the tank body 1, a discharge pipe 4 is arranged at the bottom of the tank body 1, a floating stirring component 5 and a rotary aeration component 6 are arranged in the tank body 1, the rotary aeration component 6 is arranged at the inner bottom of the tank body 1, the floating stirring component 5 is located above the rotary aeration component 6, a driving mechanism and an exhaust pipe 7 are arranged on the tank cover 2, the driving mechanism comprises a spline shaft 8 vertically penetrating into the tank body 1 downward, the floating stirring component 5 comprises a stirring mechanism and a floating mechanism, the floating mechanism is located above the stirring mechanism, the stirring mechanism comprises a plurality of stirring paddles 9, the spline shaft 8 It is used to drive a plurality of stirring paddles 9 to rotate while revolving. The floating mechanism includes an annular floating plate 10. The plurality of stirring paddles 9 are connected to the annular floating plate 10. The rotary aeration assembly 6 includes a driven shaft 11, a stirring mechanism and an aeration mechanism. The stirring mechanism is connected to the spline shaft 8 through the driven shaft 11. The aeration mechanism is connected to the stirring mechanism. The stirring mechanism is used to stir the seaweed residue sunk to the bottom of the tank body 1. The aeration mechanism is used to release oxygen into the tank body 1. A branch pipe No. 12 is provided on the exhaust pipe 7. A pneumatic valve 13 is provided on the branch pipe No. 12. When oxygen is not injected into the tank body 1, the branch pipe No. 12 is in an open state. After oxygen is injected into the tank body 1, the pneumatic valve 13 closes the branch pipe No. 12.

[0043] First, the seaweed and the fermentation liquid are mixed, and then the mixed liquid is injected into the tank body 1 through the feed pipe 3. As the mixed liquid is continuously injected into the tank body 1, the liquid level in the tank body 1 will continue to rise. When the mixed liquid submerges the stirring mechanism and contacts the floating mechanism upward, the annular floating plate 10 in the floating mechanism will be driven upward by the mixed liquid due to the buoyancy, so that the stirring mechanism arranged below the annular floating plate 10 will rise together with the annular floating plate 10. When the mixed liquid is completely injected into the tank body 1, the liquid level in the tank body 1 will no longer rise. At this time, the stirring mechanism will be suspended below the highest liquid level through the annular floating plate 10. Thereafter, oxygen is introduced into the aeration mechanism. At the same time, The spline shaft 8 starts to rotate. During this process, the aeration mechanism releases oxygen into the mixed liquid, and the stirring mechanism stirs the seaweed residue settled at the bottom of the tank body 1. Since the oxygen will rise after being released into the mixed liquid, the oxygen will float up to the stirring mechanism with the stirred seaweed residue. At this time, the stirring mechanism will fully stir the fermentation liquid and seaweed residue in the mixed liquid, and make the mixed liquid completely contact with oxygen. When the aeration mechanism continues to release oxygen, the pneumatic valve 13 will close the No. 1 exhaust pipe 7 to prevent the oxygen in the tank body 1 from overflowing. As the oxygen in the tank body 1 continues to increase, the seaweed residue in the mixed liquid will be discharged. The fermentation will be carried out with the fermentation liquid under sufficient oxygen, wherein a heating mechanism (not shown in the figure) and a temperature sensor (not shown in the figure) are installed in the tank body 1. The heating mechanism is a prior art, and the heating mechanism can be a heating tube, a heating plate or a heating ring. The heating mechanism makes the tank body 1 present a warm environment suitable for seaweed fermentation. The temperature sensor is used to monitor the temperature in the tank body 1 in real time. Since the seaweed will generate heat and gas after fermentation, and the seaweed fermentation has a temperature range, when the temperature in the tank body 1 rises to a maximum threshold value exceeding the seaweed fermentation temperature range, the temperature sensor will upload the detection data to the controller (not shown in the figure). As shown in the figure, the controller will control the oxygen to stop entering the aeration mechanism, and the heating mechanism will stop supplying heat. At this time, the No. 1 branch pipe 12 is in an open state, so the heat and gas generated after the seaweed fermentation will be discharged from the No. 1 branch pipe 12. When the temperature in the tank body 1 drops to below the lowest threshold of the seaweed fermentation temperature range, the controller will control the oxygen to enter the aeration mechanism again, and the heating mechanism will supply heat again. At the same time, the pneumatic valve 13 will close the No. 1 branch pipe 12. Thereafter, as time passes, the seaweed is completely fermented to form a fertilizer liquid. At this time, the fertilizer liquid in the tank body 1 can be discharged through the discharge pipe 4 provided at the bottom of the tank body 1.

[0044] In order to show the specific structure of the stirring mechanism, the following features are set:

[0045] The driving mechanism also includes a motor 14 vertically fixed on the tank cover 2, the upper end of the spline shaft 8 is coaxially fixedly connected to the output end of the motor 14, the driven shaft 11 is coaxially fixedly connected to the lower end of the spline shaft 8, and the stirring mechanism includes a plurality of inclined scrapers 15 evenly distributed along the circumferential direction of the driven shaft 11, one end of each inclined scraper 15 is fixedly connected to the driven shaft 11, and one side of each inclined scraper 15 is inclined downward to fit the inner bottom of the tank body 1.

[0046] When the motor 14 is started, the motor 14 will drive the spline shaft 8 to rotate, so that the spline shaft 8 will drive the plurality of inclined scrapers 15 to rotate through the driven shaft 11. When the plurality of inclined scrapers 15 rotate, the inclined scrapers 15 will stir the seaweed residue settled at the bottom of the tank body 1. During this process, the seaweed residue will float upward along the inclined scrapers 15. After the seaweed residue floats, the oxygen released by the aeration mechanism will carry the floating seaweed residue to continue to rise to the stirring mechanism. Thereafter, the seaweed residue and the fermentation liquid will be fully stirred through the stirring mechanism.

[0047] In order to show the specific structure of the aeration mechanism, the following features are set:

[0048] The aeration mechanism includes a plurality of aeration pipes 16 corresponding to the inclined scrapers 15 one by one, such as Fig.15 As shown, each aeration pipe 16 is fixedly mounted on the corresponding inclined scraper 15, a venting joint 17 is fixedly mounted on the bottom of the tank body 1, and a swivel joint 18 is mounted on the upper end of the venting joint 17. Fig.10 As shown, the rotary joint 18 includes a rotary head 19 and a connecting head 20, the connecting head 20 is coaxially fixed to the upper end of the ventilation joint 17, the rotary head 19 rotates at the upper end of the connecting head 20, and the rotary head 19 is coaxially fixed to the lower end of the driven shaft 11, and vertical ventilation grooves 21 are coaxially provided in the rotary head 19 and the connecting head 20. A plurality of connecting nozzles 22 corresponding to the aeration pipes 16 are provided on the outer wall of the rotary head 19, each connecting nozzle 22 is connected to the ventilation groove 21 in the rotary head 19, and one end of each aeration pipe 16 is fixedly connected to the corresponding connecting nozzle 22.

[0049] Oxygen is introduced into the aeration mechanism through the lower end of the ventilation joint 17. During this process, the oxygen will first enter the rotary joint 18 along the ventilation joint 17, and then the oxygen will go upward through a plurality of connecting nozzles 22 and enter a plurality of aeration tubes 16 respectively. Each aeration tube 16 will spray out oxygen. When the aeration tube 16 releases oxygen, the spline shaft 8 will drive the rotary head 19 to rotate through the driven shaft 11, so that each aeration tube 16 will rotate together with the inclined scraper 15, and finally ensure that the oxygen generated by the aeration tube 16 can push the seaweed residue stirred by the inclined scraper 15 to rise.

[0050] In order to show the specific structure of the pneumatic valve 13, the following features are set:

[0051] The pneumatic valve 13 includes a valve tube 23, a valve pin 24 and a spring 25. The valve tube 23 is horizontal. One end of the valve tube 23 is coaxially formed with a hollow circular plate 26. The other end of the valve tube 23 is an open structure. The outer wall of the valve tube 23 is provided with an air outlet 27 and an exhaust port 28 both of which are connected to the valve tube 23. The valve pin 24 is arranged in the valve tube 23. The valve pin 24 includes a columnar head 29 and a square rod 30 connected end to end. The outer diameter of the columnar head 29 is consistent with the inner diameter of the valve tube 23. The square rod 30 faces the hollow circular plate 26, and the square rod 30 passes through the hollow circular plate 26 horizontally. The columnar head 29 is connected to the inner diameter of the valve tube 23. A notch 31 is provided at one end of the valve tube 23, a square rod 30 is provided at one end of the columnar head 29, and an arc-shaped baffle 32 for blocking the air outlet 27 is formed on the outer wall thereof, a baffle ring 33 close to the hollow circular plate 26 is coaxially formed on the inner wall of the valve tube 23, the spring 25 is horizontally arranged in the valve tube 23, the spring 25 is sleeved outside the square rod 30, and the two ends of the spring 25 are respectively in conflict with the baffle ring 33 and the columnar head 29, the air outlet 27 is connected to the lower end of the vent joint 17 through a connecting pipe 34, and an air inlet pipe 35 is coaxially fixedly connected to the open end of the valve tube 23.

[0052] In the initial state, the spring 25 releases its elastic force, and the spring 25 pushes the entire valve pin 24 toward the air inlet pipe 35 by contacting the columnar head 29. Finally, the columnar head 29 contacts the end of the air inlet pipe 35. At this time, the arc-shaped baffle 32 blocks the air outlet 27, and the exhaust port 28 is in an open state. When oxygen enters the valve tube 23 through the air inlet pipe 35, the oxygen drives the valve pin 24 to contract inward. During this process, the columnar head 29 compresses the spring 25. At the same time, when the columnar head 29 moves to the point where the notch 31 faces the air outlet 27, the columnar head 29 blocks the exhaust port 28. At this time, oxygen enters the valve tube 23 through the air outlet 27. In the connecting pipe 34, oxygen will eventually flow into the ventilation joint 17 along the connecting pipe 34. When the temperature in the tank body 1 is too high, the oxygen will stop flowing into the air inlet pipe 35, and the valve pin 24 will be driven by the spring 25 to move toward the air inlet pipe 35 again. Finally, the arc-shaped baffle 32 will block the air outlet 27 again, and the exhaust port 28 will be in an open state, so that the heat and gas in the tank body 1 will be discharged through the exhaust port 28. Among them, the square rod 30 passing through the hollow circular plate 26 is used to limit the rotation of the valve pin 24, so as to ensure that when the valve pin 24 is translated, the notch 31 on the valve pin 24 can face the air outlet 27.

[0053] In order to show the specific installation method of the annular floating plate 10, the following features are set:

[0054] The spline shaft 8 is provided with a sliding sleeve 36. Figure 7As shown, the spline shaft 8 coaxially passes through the sliding sleeve 36, the floating mechanism also includes a connecting hub 37 fixed on the inner ring of the annular floating plate 10, the upper end fixed sleeve of the sliding sleeve 36 is provided with a bearing 38, the stirring mechanism is provided at the lower end of the sliding sleeve 36, the center of the connecting hub 37 is fixedly connected to the outer ring of the bearing 38, a plurality of limiting strips 39 uniformly distributed along the circumferential direction of the annular floating plate 10 are formed at the outer edge of the annular floating plate 10, each limiting strip 39 is vertical, a plurality of limiting grooves 40 matching with the limiting strips 39 are provided on the inner wall of the tank body 1, and a limiting convex ring 41 for limiting the downward movement of the sliding sleeve 36 is formed on the outer wall of the lower end of the spline shaft 8, as shown in FIG. Fig. 9 shown.

[0055] When the spline shaft 8 rotates, since the center of the connecting hub 37 is fixedly connected to the outer ring of the bearing 38, the rotation of the spline shaft 8 will not affect the connecting hub 37. Then, when the liquid level in the tank body 1 rises, the annular float 10 will be driven to rise, and the annular float 10 will drive the stirring mechanism to rise together through the sliding sleeve 36. Among them, the annular float 10 is limited to rotate by the cooperation of the limit bar 39 provided at the outer edge of the annular float 10 and the limit groove 40 on the inner wall of the tank body 1, ensuring that the annular float 10 can only be raised and lowered in the vertical direction. When the mixed liquid is not injected into the tank body 1, the stirring mechanism will drive the annular float 10 to descend together with the sliding sleeve 36 due to its own weight, and finally the sliding sleeve 36 will conflict downward with the limit convex ring 41.

[0056] In order to show the specific structure of the stirring mechanism, the following features are set:

[0057] The stirring mechanism also includes a gear ring 42 and a plurality of bevel gears 43 corresponding to the stirring paddles 9 one by one. The gear ring 42 is sleeved on the outside of the sliding sleeve 36. The gear ring 42 is fixed to the bottom of the connecting hub 37 through a plurality of vertical rods 44. The axial direction of each stirring paddle 9 is perpendicular to the axial direction of the sliding sleeve 36, and each stirring paddle 9 rotates on the outer wall of the sliding sleeve 36. Each bevel gear 43 is coaxially fixed to the corresponding stirring paddle 9, and each bevel gear 43 is meshed with the gear ring 42.

[0058] When the spline shaft 8 rotates, the spline shaft 8 drives the sliding sleeve 36 to rotate, and the sliding sleeve 36 drives a plurality of stirring paddles 9 to revolve around the sliding sleeve 36. During this process, the bevel gear 43 provided on each stirring paddle 9 rolls on the gear ring 42, and each stirring paddle 9 rotates during the revolution. The stirring performance of the stirring paddle 9 rotating in this way is greatly improved, and finally it is ensured that the rising seaweed residue can be fully stirred with the fermentation liquid. The gear ring 42 is located on the bevel gear meshed with the bevel gear 43.

[0059] In order to control the opening and closing of the feed pipe 3 and the discharge pipe 4, and to quickly release the pressure in the tank body 1, the following features are provided:

[0060] A No. 1 rotary valve 45 is provided on the feed pipe 3 , a No. 2 rotary valve 46 is provided on the discharge pipe 4 , a No. 2 branch pipe 47 and a pressure gauge 48 are provided on the exhaust pipe 7 , and a No. 3 rotary valve 49 is provided on the No. 2 branch pipe 47 .

[0061] When the mixed liquid is injected into the tank body 1 through the feed pipe 3, the discharge pipe 4 is closed through the No. 2 rotary valve 46. When the fertilizer liquid is discharged through the discharge pipe 4, the feed pipe 3 is closed through the No. 1 rotary valve 45. The pressure gauge 48 is used to detect the air pressure value in the exhaust pipe 7 in real time. When the air pressure value in the exhaust pipe 7 is too high, the No. 2 branch pipe 47 can be opened through the No. 3 rotary valve 49, so as to achieve rapid pressure relief of the pressure in the tank body 1.

[0062] A method for preparing seaweed fertilizer, the method comprising the following steps:

[0063] S1, mixing seaweed and fermentation liquid, and injecting the mixed liquid into the tank body 1 through the feed pipe 3;

[0064] A heating mechanism and a temperature sensor are installed in the tank body 1. The heating mechanism is a prior art and can be a heating tube, a heating plate or a heating ring. The heating mechanism makes the tank body 1 present a warm environment suitable for seaweed fermentation. The temperature sensor is used to detect the temperature in the tank body 1 in real time.

[0065] S2, introducing oxygen into the aeration mechanism;

[0066] The aeration mechanism will release oxygen into the mixed liquid, and the stirring mechanism will stir the seaweed residue settled at the bottom of the tank body 1. Since the oxygen will rise after being released into the mixed liquid, the oxygen will float up to the stirring mechanism with the stirred seaweed residue. At this time, the stirring mechanism will fully stir the fermentation liquid and seaweed residue in the mixed liquid, and make the mixed liquid completely contact with oxygen. When the aeration mechanism continues to release oxygen, the pneumatic valve 13 will close the No. 1 exhaust pipe 7 to prevent the oxygen in the tank body 1 from overflowing.

[0067] S3, stirring the seaweed residue sunk at the bottom of the tank 1 by a stirring mechanism;

[0068] When the motor 14 is started, the motor 14 will drive the spline shaft 8 to rotate, so that the spline shaft 8 will drive the plurality of inclined scrapers 15 to rotate through the driven shaft 11. When the plurality of inclined scrapers 15 rotate, the inclined scrapers 15 will stir the seaweed residue settled at the bottom of the tank body 1. During this process, the seaweed residue will float upward along the inclined scrapers 15. After the seaweed residue floats, the oxygen released by the aeration mechanism will carry the floating seaweed residue to continue to rise to the stirring mechanism. Thereafter, the seaweed residue and the fermentation liquid will be fully stirred through the stirring mechanism.

[0069] S4, the annular floating plate 10 rises together with the liquid level in the tank body 1, and the seaweed residue and the fermentation liquid are fully stirred by the stirring mechanism connected to the annular floating plate 10;

[0070] When the spline shaft 8 rotates, the spline shaft 8 will drive the sliding sleeve 36 to rotate, and the sliding sleeve 36 will drive several stirring paddles 9 to revolve around the sliding sleeve 36. During this process, the bevel gear 43 provided on each stirring paddle 9 will roll on the gear ring 42, and then each stirring paddle 9 will rotate during the revolution. The stirring performance of the stirring paddle 9 rotating in this way is greatly improved, and finally it is ensured that the rising seaweed residue can be fully stirred with the fermentation liquid.

[0071] S5, the seaweed is fermented to form fertilizer liquid, which is discharged through the discharge pipe 4.

[0072] Since seaweed will generate heat and gas after fermentation, and seaweed fermentation has a temperature range, when the temperature in the tank body 1 rises to a temperature exceeding the highest threshold of the seaweed fermentation temperature range, the temperature sensor will upload the detection data to the controller (not shown in the figure), and the controller will control the oxygen to stop entering the aeration mechanism, and the heating mechanism will stop supplying heat. At this time, the No. 1 branch pipe 12 is in an open state, so the heat and gas generated by the seaweed fermentation will be discharged from the No. 1 branch pipe 12 together. When the temperature in the tank body 1 drops to below the lowest threshold of the seaweed fermentation temperature range, the controller will control the oxygen to enter the aeration mechanism again, the heating mechanism will supply heat again, and the pneumatic valve 13 will close the No. 1 branch pipe 12. Thereafter, as time passes, the seaweed is completely fermented to form a fertilizer liquid. At this time, the fertilizer liquid in the tank body 1 can be discharged through the discharge pipe 4 provided at the bottom of the tank body 1.

[0073] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A fermentation tank for seaweed fertilizer production, characterized in that: The invention comprises a fermentation tank arranged vertically, the fermentation tank comprising a tank body (1) and a tank cover (2) arranged on the top of the tank body (1), a feed pipe (3) being arranged on the outer wall of the tank body (1), a discharge pipe (4) being arranged at the bottom of the tank body (1), a floating stirring assembly (5) and a rotary aeration assembly (6) being arranged in the tank body (1), the rotary aeration assembly (6) being arranged at the inner bottom of the tank body (1), the floating stirring assembly (5) being located above the rotary aeration assembly (6), a driving mechanism and an exhaust pipe (7) being arranged on the tank cover (2), the driving mechanism comprising a spline shaft (8) vertically penetrating downward into the tank body (1), the floating stirring assembly (5) comprising a stirring mechanism and a floating mechanism, the floating mechanism being located above the stirring mechanism, the stirring mechanism comprising a plurality of stirring paddles (9), the spline shaft (8) being used to drive a plurality of stirring paddles (9), and the spline shaft (8) being used to drive a plurality of stirring paddles (9). The stirring paddles (9) rotate while revolving, the floating mechanism comprises an annular floating plate (10), and the plurality of stirring paddles (9) are connected to the annular floating plate (10). The rotary aeration assembly (6) comprises a driven shaft (11), a stirring mechanism and an aeration mechanism. The stirring mechanism is connected to the spline shaft (8) via the driven shaft (11), and the aeration mechanism is connected to the stirring mechanism. The stirring mechanism is used to stir the seaweed residue sunk at the bottom of the tank body (1). The aeration mechanism is used to release oxygen into the tank body (1). The exhaust pipe (7) is provided with a first branch pipe (12), and the first branch pipe (12) is provided with a pneumatic valve (13). When oxygen is not injected into the tank body (1), the first branch pipe (12) is in an open state. After oxygen is injected into the tank body (1), the pneumatic valve (13) closes the first branch pipe (12); A sliding sleeve (36) is provided on the spline shaft (8), and the spline shaft (8) coaxially passes through the sliding sleeve (36). The floating mechanism also includes a connecting hub (37) fixed on the inner ring of the annular floating plate (10). The upper fixed sleeve of the sliding sleeve (36) is provided with a bearing (38). The stirring mechanism is provided at the lower end of the sliding sleeve (36). The center of the connecting hub (37) is fixedly connected to the outer ring of the bearing (38). A plurality of limiting strips (39) uniformly distributed along the circumferential direction of the annular floating plate (10) are formed at the outer edge of the annular floating plate (10), and each limiting strip (39) is vertical. A plurality of limiting grooves (40) matching the limiting strips (39) are formed on the inner wall of the tank body (1). A limiting convex ring (41) for limiting the downward movement of the sliding sleeve (36) is formed on the outer wall of the lower end of the spline shaft (8). The stirring mechanism further comprises a gear ring (42) and a plurality of bevel gears (43) corresponding one to one with the stirring paddles (9); the gear ring (42) is sleeved outside the sliding rotating sleeve (36); the gear ring (42) is fixed to the bottom of the connecting hub (37) via a plurality of vertical rods (44); the axial direction of each stirring paddle (9) is perpendicular to the axial direction of the sliding rotating sleeve (36); each stirring paddle (9) rotates on the outer wall of the sliding rotating sleeve (36); each bevel gear (43) is coaxially fixedly connected to the corresponding stirring paddle (9); and each bevel gear (43) is meshed with the gear ring (42).

2. A fermentation tank for seaweed fertilizer production according to claim 1, characterized in that: The driving mechanism also includes a motor (14) vertically fixed on the tank cover (2); the upper end of the spline shaft (8) is coaxially fixedly connected to the output end of the motor (14); the driven shaft (11) is coaxially fixedly connected to the lower end of the spline shaft (8); and the stirring mechanism includes a plurality of inclined scrapers (15) evenly distributed along the circumferential direction of the driven shaft (11); one end of each inclined scraper (15) is fixedly connected to the driven shaft (11); and one side of each inclined scraper (15) is inclined downward to fit the inner bottom of the tank body (1).

3. A fermentation tank for seaweed fertilizer production according to claim 2, characterized in that: The aeration mechanism comprises a plurality of aeration pipes (16) corresponding one to one with the inclined scrapers (15), each aeration pipe (16) being fixedly mounted on the corresponding inclined scraper (15), a ventilation joint (17) being fixedly mounted on the bottom of the tank body (1), a swivel joint (18) being mounted on the upper end of the ventilation joint (17), the swivel joint (18) comprising a swivel head (19) and a connector (20), the connector (20) being coaxially fixed to the upper end of the ventilation joint (17), the swivel head (19) being rotatable about the connector (20) The upper end of the joint (20) is coaxially fixedly connected to the rotating head (19) and the lower end of the driven rotating shaft (11). The rotating head (19) and the connecting head (20) are coaxially provided with vertical ventilation grooves (21). The outer wall of the rotating head (19) is provided with a plurality of connecting nozzles (22) corresponding to the aeration pipes (16) one by one. Each connecting nozzle (22) is connected to the ventilation groove (21) in the rotating head (19), and one end of each aeration pipe (16) is fixedly connected to the corresponding connecting nozzle (22).

4. A fermentation tank for seaweed fertilizer production according to claim 3, characterized in that: The pneumatic valve (13) comprises a valve tube (23), a valve pin (24) and a spring (25). The valve tube (23) is horizontal. A hollow circular plate (26) is coaxially formed on one end of the valve tube (23). The other end of the valve tube (23) is an open structure. An air outlet (27) and an air outlet (28) both of which are connected to the valve tube (23) are provided on the outer wall of the valve tube (23). The valve pin (24) is arranged in the valve tube (23). The valve pin (24) comprises a columnar head (29) and a square rod (30) connected end to end. The outer diameter of the columnar head (29) is consistent with the inner diameter of the valve tube (23). The square rod (30) faces the hollow circular plate (26). The square rod (30) passes through the hollow circular plate (26) in a horizontal manner. (29) has a notch (31) at one end of the valve tube (23) opening, the columnar head (29) has a square rod (30) having an arc-shaped baffle (32) formed on the outer wall at one end thereof for blocking the air outlet (27), the inner wall of the valve tube (23) has a baffle ring (33) coaxially formed near the hollow circular plate (26), the spring (25) is horizontally arranged in the valve tube (23), the spring (25) is sleeved outside the square rod (30), and the two ends of the spring (25) are respectively in contact with the baffle ring (33) and the columnar head (29), the air outlet (27) is connected to the lower end of the vent joint (17) through a connecting pipe (34), and an air inlet pipe (35) is coaxially fixedly connected to the open end of the valve tube (23).

5. The fermentation tank for seaweed fertilizer production according to claim 1, characterized in that: The feed pipe (3) is provided with a No. 1 rotary valve (45), the discharge pipe (4) is provided with a No. 2 rotary valve (46), the exhaust pipe (7) is provided with a No. 2 branch pipe (47) and a pressure gauge (48), and the No. 3 rotary valve (49) is provided on the No. 2 branch pipe (47).

6. A method for preparing seaweed fertilizer using a fermentation tank for seaweed fertilizer production according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: S1, mixing seaweed and fermentation liquid, and injecting the mixed liquid into the tank (1) through the feed pipe (3); S2, introducing oxygen into the aeration mechanism; S3, stirring the seaweed residue sunk to the bottom of the tank (1) by means of a stirring mechanism; S4, the annular floating plate (10) rises together with the liquid level in the tank body (1), and the seaweed residue and the fermentation liquid are fully stirred by a stirring mechanism connected to the annular floating plate (10); S5, the seaweed is fermented to form fertilizer liquid, which is discharged through the discharge pipe (4).

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