Efficient microalgae culture equipment and method

Abstract

The invention discloses efficient microalgae culture equipment which comprises a raceway pond structure, a concentric table, an electric belt conveying mechanism, a water stirring lifting mechanism and a circulating ventilation mechanism, a pond body is arranged in the raceway pond structure, the concentric table is arranged in the center of the pond body, and the electric belt conveying mechanism is installed on the concentric table and drives the circulating ventilation mechanism to move along a set track; the water-stirring lifting mechanism is arranged on one side of the tank body and comprises a screw rod for adjusting the height, a lifting block, a sealing sliding plate and a water-stirring impeller, the circulating ventilation mechanism comprises an air compression mechanism, a ventilation pipe, a transverse pipe and an air outlet head, and the air compression mechanism compresses air through a piston assembly and injects the air into the bottom of the tank body through the air outlet head; according to the equipment, the height of the water-repellent impeller is automatically adjusted along with the liquid level through the water-repellent lifting mechanism, the movable air outlet structure is combined to expand the inflation range and prevent blockage, the air compression mechanism realizes efficient one-way air supply through mechanical reciprocating, and the ventilation effect is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of microalgae cultivation, and in particular relates to a device and method for efficiently cultivating microalgae. Background Art

[0002] Microalgae are widely used in fields such as bioenergy, environmental governance, and nutrition and health due to their short growth cycles, high photosynthetic efficiency, and efficient resource utilization. In practical applications, efficient microalgae cultivation requires high environmental conditions, particularly stable lighting, water levels, gas supply, and agitation to prevent sinking, insufficient light, or uneven ventilation, thereby ensuring rapid growth and uniform distribution of the microalgae.

[0003] Existing microalgae cultivation systems mostly use a fixed tank structure, and achieve air supply through a fixed ventilation pipe arranged at the bottom, while achieving liquid circulation through a water pump or a fixed stirring device. However, this type of structure has the following technical problems in actual use: on the one hand, due to the fixed position of the ventilation device, the gas distribution in the tank is uneven, making it difficult to fully aerate the entire cultivation area, resulting in local microalgae sedimentation and uneven nutrition; on the other hand, the traditional stirring structure has the problems of non-adjustable height and poor adaptability to liquid level changes. When the liquid level changes, it is difficult for the stirring axis to always be in the appropriate position, the stirring efficiency is reduced, and the uniformity of microalgae growth is affected. In addition, some devices have poor sealing of the openings during the adjustment process, which can easily lead to liquid leakage, increasing operational risks and maintenance difficulties. Summary of the Invention

[0004] In response to the problems existing in the prior art, the purpose of the present invention is to provide an efficient microalgae cultivation device and method, which can achieve a microalgae cultivation device with uniform ventilation, efficient stirring and good sealing performance, so as to solve the specific technical problems existing in the prior art, such as ventilation limitations, low stirring efficiency, poor adaptability and liquid leakage.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A high-efficiency microalgae cultivation device includes a raceway pool structure, wherein the raceway pool structure includes a pool body, the pool body is hollow inside and has an open top, a concentric platform is provided in the center of the raceway pool structure, and an electric belt conveyor mechanism is installed on the upper surface of the concentric platform;

[0007] A runway groove is provided on the surface of the concentric platform, and the runway groove is placed outside the electric belt conveyor mechanism. An installation box is provided on one side of the runway pool structure, and a water-dipping and lifting mechanism is installed inside the installation box. The water-dipping and lifting mechanism adjusts its height according to the water level.

[0008] A circulating ventilation mechanism is installed on the surface of the concentric table, and the circulating ventilation mechanism is used to transport gas through the pool body. The circulating ventilation mechanism includes a moving block fixed to the outside of the electric belt conveyor mechanism, and the moving block moves along the track of the runway groove;

[0009] An air compression mechanism is provided on the top of the moving block, and the air compression mechanism sucks in and compresses air during the movement of the circulating ventilation mechanism.

[0010] Furthermore, a sealed slide groove is opened downward on the inner side of the installation box, and an open groove is opened on the outer side of the installation box. The water-diverting lifting mechanism includes a screw that rotates symmetrically and vertically on the inner side of the installation box. A lifting block is slidably installed inside the installation box, and the lifting block rotates on the two screws.

[0011] Furthermore, a sealing slide is fixed on the outside of the lifting block, and the bottom of the sealing slide slides on the inside of the sealing slide groove. The sealing slide groove always maintains a seal on the open groove to prevent liquid leakage. A motor is fixed on the outside of the sealing slide, and the motor output shaft passes through the sealing slide and the lifting block. A water-displacing impeller is installed on the output end of the motor, and the water-displacing impeller is placed inside the pool body.

[0012] Furthermore, the inner wall of one side of the runway groove is evenly provided with convex teeth, the movable block rotates inside and passes through the rotating shaft, the bottom of the rotating shaft is placed on the inner side of the gear, the gear and the convex teeth are engaged with each other, and the movable block rotates when the electric belt conveyor mechanism moves along the runway groove.

[0013] Furthermore, a fixed sleeve is provided on one side of the movable block, a ventilation pipe is vertically fixed on the inner side of the fixed sleeve, the ventilation pipe is placed on the periphery of the concentric platform, a horizontal tube is horizontally provided at the bottom of the ventilation pipe, the horizontal tube is placed on the side of the ventilation pipe away from the concentric platform, and air outlet heads are evenly provided on the top of the horizontal tube.

[0014] Furthermore, the air compression mechanism includes a turntable fixed on the top of the rotating shaft and a fixed cylinder fixed on the upper surface of the moving block, the upper surface of the turntable is provided with a wavy convex surface along the axis, the interior of the fixed cylinder is hollow, the turntable is placed on the inner side of the fixed cylinder, a fixed plate is provided inside the fixed cylinder, air inlet holes are evenly opened on the top of the fixed cylinder along the axis, an exhaust hole is opened above one side of the fixed cylinder, the top of the ventilation pipe is connected to the exhaust hole, a valve plate is hinged above the exhaust hole, and the valve plate can only be flipped outward.

[0015] Furthermore, a piston plate is slidably installed inside the fixed cylinder, and the piston plate is placed above the fixed plate. Fixed bolts are symmetrically arranged on the bottom of the piston plate, and the two fixed bolts both pass through the fixed plate. An extrusion hemispherical head is arranged at the bottom of the fixed bolt, and the bottoms of the two extrusion hemispherical heads are respectively in contact with the wave convex surface. A spring is provided on the surface of the fixed bolt, and the spring is placed between the fixed plate and the extrusion hemispherical head. The spring applies a downward thrust to the extrusion hemispherical head.

[0016] Furthermore, a connecting rod is passed through the center of the top of the fixed cylinder, a limiting plate is provided at the bottom of the connecting rod, a rubber sheet is installed on the surface of the connecting rod, the limiting plate and the rubber sheet are placed above the inside of the fixed cylinder, the rubber sheet seals the bottom of multiple air inlet holes, and an adjusting nut is screwed on the top of the connecting rod, and the adjusting nut is placed above the fixed cylinder.

[0017] Further, the specific steps are as follows:

[0018] Step 1: Pour clean water into the pool, then select a high-concentration algae seed for inoculation. Adjust the overall height of the water-dispensing lifting mechanism according to the internal water level. Start the motor to stir the water through the water-dispensing impeller, thereby allowing the liquid inside the runway pool structure to flow.

[0019] Step 2: Add nutrients to the pond body, add urea and potassium dihydrogen phosphate per ton of water, and replenish once a week. Add nutrients through the stirring area of ​​the water lifting mechanism to quickly stir the nutrients evenly;

[0020] Step 3: Ventilate the interior of the runway pool structure and start the electric belt conveyor mechanism to control the movement of the circulating ventilation mechanism, so that the air is compressed by the air compression mechanism and introduced into the interior of the horizontal pipe, and inflated upward through the air outlet head to replenish oxygen and carbon dioxide. At the same time, the movement of the horizontal pipe at the bottom of the pool can stir the bottom to prevent microalgae from sinking to the bottom.

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

[0022] By setting up a water-pumping lifting mechanism, the height of the water-pumping impeller can be adjusted in real time according to the changes in the liquid level in the pool body, so that the water-pumping impeller is always in a suitable stirring position, ensuring that the stirring efficiency is not reduced due to liquid level fluctuations, and effectively solving the problems of the existing technology that the stirring mechanism height cannot be adjusted and the adaptability to liquid level changes is poor; during the adjustment process, the sealing slide is always in contact with the sealing slide groove, ensuring the sealing of the open groove during the lifting action, preventing the leakage of culture fluid, and improving the safety and sealing stability of the overall operation of the device.

[0023] By designing the circulating ventilation mechanism as a structure that can move along the runway groove and cooperating with the electric belt conveyor mechanism to achieve dynamic walking, the air compression mechanism can move and supply air throughout the entire pool body, avoiding the problem of uneven gas distribution caused by the traditional fixed air supply method; at the same time, the ventilation structure forms a dynamic stirring effect during movement, expanding the gas exchange range of the pool body, effectively improving the efficiency of the supply of oxygen and carbon dioxide required for the growth of microalgae, and reducing the phenomenon of insufficient gas supply in local dead corners.

[0024] By setting up an air compression mechanism, the gas can be synchronously inhaled and compressed during movement, forming an efficient and continuous one-way inflation path; in conjunction with the exhaust valve plate and the rubber sheet limiting structure, two-way flow limiting control of the air inlet and exhaust holes can be achieved, thereby avoiding problems such as gas reverse flow and insufficient compression; the piston structure is driven by the wave convex surface during operation, and completes high-frequency reciprocating motion with the help of the extrusion hemispherical head and spring thrust, thereby improving the gas flow and inflation uniformity, and solving the problems of low ventilation efficiency, complex compression structure or inconvenient maintenance in the existing technology.

[0025] By setting up a horizontal air outlet pipe and a distributed air outlet head, the compressed air can be released evenly along the bottom of the pool. At the same time, the horizontal air outlet pipe continuously changes the inflation position as the circulating ventilation mechanism moves, effectively preventing problems such as blockage and bubble concentration caused by fixed air holes, improving the coordinated efficiency of stirring and inflation, and solving the defects of traditional fixed ventilation systems in affecting the uniformity of microalgae cultivation due to fouling and insufficient flow during long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the installation three-dimensional structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the pool structure of the present invention;

[0028] Figure 3 This is a schematic structural diagram of the water-dipping lifting mechanism of the present invention;

[0029] Figure 4 It is a schematic structural diagram of the ventilation mechanism of the present invention;

[0030] Figure 5 For the present invention Figure 4 Schematic diagram of the cross-section structure;

[0031] Figure 6 This is a schematic diagram of the wave convex surface structure of the present invention;

[0032] Figure 7 Schematic diagram of the cross-sectional structure of the air compression structure of the present invention;

[0033] Figure 8 It is a schematic diagram of the explosion structure of the air compression mechanism of the present invention.

[0034] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0035] 1. Runway pool structure; 11. Pool body; 12. Support frame; 13. Concentric platform; 14. Runway groove; 15. Raised teeth; 16. Mounting box; 17. Sealed chute; 18. Open chute;

[0036] 2. Electric belt conveyor mechanism;

[0037] 3. Water-displacing lifting mechanism; 31. Screw; 32. Lifting block; 33. Sealing slide; 34. Motor; 35. Water-displacing impeller;

[0038] 4. Circulation ventilation mechanism; 41. Moving block; 42. Fixed sleeve; 43. Rotating shaft; 44. Gear; 45. Ventilation pipe; 46. Horizontal pipe; 47. Air outlet;

[0039] 5. Air compression mechanism; 51. Turntable; 52. Wave convex surface; 53. Fixed cylinder; 531. Air inlet; 532. Exhaust hole; 54. Fixed plate; 55. Piston plate; 56. Fixed bolt; 57. Extrusion hemispherical head; 58. Spring; 59. Valve plate; 510. Connecting rod; 511. Limit plate; 512. Rubber sheet; 513. Adjusting nut. DETAILED DESCRIPTION

[0040] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following examples. It should be understood that the following text is only used to describe one or more specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.

[0041] Example 1:

[0042] See Figure 1-8, a microalgae efficient cultivation equipment, including a runway pool structure 1, the runway pool structure 1 includes a pool body 11, the pool body 11 is hollow inside and the top is open, which is convenient for liquid injection and gas exchange; a concentric platform 13 is provided in the center of the runway pool structure 1, and an electric belt conveyor mechanism 2 is installed on the upper surface of the concentric platform 13, and the electric belt conveyor mechanism 2 is used to drive the circulation ventilation mechanism 4 to reciprocate along the set track; a runway groove 14 is opened on the surface of the concentric platform 13, and the runway groove 14 is placed on the outside of the electric belt conveyor mechanism 2, which is used to limit and guide the moving path of the circulation ventilation mechanism 4; an installation box 16 is provided on one side of the runway pool structure 1, and a water-pumping lifting mechanism 3 is installed inside the installation box 16, and the water-pumping lifting mechanism 3 is connected to the water-pumping lifting mechanism 3. The height of the water-displacing impeller 35 is adjusted according to the water level to achieve effective stirring, ensuring uniform flow of the culture liquid and suspension of microalgae; a circulating ventilation mechanism 4 is installed on the surface of the concentric table 13, and the circulating ventilation mechanism 4 is used to transport gas through the pool body 11 to prevent the microalgae from sinking to the bottom and promote nutrient mixing; the circulating ventilation mechanism 4 includes a moving block 41 fixed to the outside of the electric belt conveyor mechanism 2, and the moving block 41 moves along the track of the runway groove 14, driving the air compression mechanism 5 to perform air inhalation and pressurization operations during the movement; an air compression mechanism 5 is provided on the top of the moving block 41, and the air compression mechanism 5 continues to work during movement through mechanical compression, thereby improving the gas injection efficiency and distribution uniformity.

[0043] See Figure 1-3 A sealing slide groove 17 is provided downwardly on the inner side of the installation box 16. The sealing slide groove 17 is used to guide the sliding of the sealing slide plate 33 and seal the open groove 18 during the lifting and adjusting process to prevent leakage of the culture medium; an open groove 18 is provided on the outer side of the installation box 16. The open groove 18 provides a spatial path for the sliding of the water-dipping lifting mechanism 3; the water-dipping lifting mechanism 3 includes two screws 31 that rotate symmetrically and vertically on the inner side of the installation box 16. The two screws 31 are used to drive the lifting block 32 for lifting and adjusting; a lifting block 32 is slidingly installed inside the installation box 16. The lifting block 32 is screwed on the surface of the two screws 31. The lifting block 32 is connected to the sealing slide plate 33 and the motor 34 to provide power support for the water-dipping impeller 35 and ensure the overall sealing of the device.

[0044] See Figure 1-3 A sealing slide 33 is fixed to the outside of the lifting block 32, and the bottom of the sealing slide 33 slides on the inside of the sealing slide 17. The sealing slide 17 always maintains a seal with the open groove 18 through the sealing slide 33 to prevent liquid leakage; a motor 34 is fixed to the outside of the sealing slide 33, and the motor 34 provides a rotational driving force for the water-pumping impeller 35; the output shaft of the motor 34 passes through the sealing slide 33 and the lifting block 32 to stably connect the water-pumping impeller 35; the output end of the motor 34 is equipped with a water-pumping impeller 35, which is placed on the inside of the pool body 11. When the water-pumping impeller 35 rotates, it drives the culture liquid to flow, forming a circulating water flow to prevent microalgae from depositing on the bottom of the pool.

[0045] See Figure 2-5 The inner wall of one side of the runway groove 14 is evenly provided with convex teeth 15, which are used to engage with the gear 44 to provide rotational power; the internal rotation of the moving block 41 passes through the rotating shaft 43, and the rotating shaft 43 forms a mechanical linkage with the convex teeth 15 through gear transmission; the bottom of the rotating shaft 43 is placed on the inner side of the gear 44, and the gear 44 and the convex teeth 15 are engaged with each other. When the moving block 41 moves along the runway groove 14, the gear 44 drives the rotating shaft 43 to rotate, providing rotation input for the turntable 51 of the air compression mechanism 5.

[0046] See Figure 2-5 A fixed sleeve 42 is provided on one side of the movable block 41, and the fixed sleeve 42 is used to fix the position of the vent pipe 45 and guide the gas passage; a vent pipe 45 is vertically fixed on the inside of the fixed sleeve 42, and the vent pipe 45 is used to transmit compressed air; the vent pipe 45 is placed on the periphery of the concentric platform 13, and a transverse pipe 46 is transversely provided at the bottom of the vent pipe 45, and the transverse pipe 46 is placed on the side of the vent pipe 45 away from the concentric platform 13 and in contact with the bottom of the pool body 11; gas outlet heads 47 are evenly provided on the top of the transverse pipe 46, and the gas outlet heads 47 disturb the bottom liquid by spraying gas, thereby expanding the inflation range, improving the ventilation uniformity and preventing microalgae from sinking to the bottom.

[0047] See Figure 5-8 The air compression mechanism 5 includes a turntable 51 fixed to the top of the rotating shaft 43 and a fixed cylinder 53 fixed on the upper surface of the moving block 41; a wave convex surface 52 is provided on the upper surface of the turntable 51 along the axis, and the wave convex surface 52 is in a wave-shaped symmetrical structure and is in continuous contact with the extrusion hemispherical head 57 below; the interior of the fixed cylinder 53 is hollow, and the turntable 51 is placed inside the fixed cylinder 53, and drives the internal piston plate 55 to reciprocate through rotation; a fixed plate 54 is provided inside the fixed cylinder 53, and a piston plate 55 is installed on the upper surface of the fixed plate 54. A plurality of air inlet holes 531 are evenly opened along the axis on the top of the fixed cylinder 53, and the air inlet holes 531 are used for one-way entry of air; an exhaust hole 532 is opened on the upper side of the fixed cylinder 53, and the exhaust hole 532 is connected to the ventilation pipe 45; a valve plate 59 is hinged above the exhaust hole 532, and the valve plate 59 seals the exhaust hole 532 by its own weight, and only allows it to flip outward to achieve one-way exhaust.

[0048] See Figure 5-8A piston plate 55 is slidably installed inside the fixed cylinder 53, and the piston plate 55 completes the intake and exhaust through volume changes when it moves up and down; the piston plate 55 is placed above the fixed plate 54, and two fixing bolts 56 are symmetrically arranged at the bottom of the piston plate 55. The two fixing bolts 56 pass through the fixed plate 54 and transmit the extrusion force; an extrusion hemispherical head 57 is provided at the bottom of the fixing bolt 56, and the extrusion hemispherical head 57 contacts the wave convex surface 52 to form an up and down movement; a spring 58 is sleeved on the surface of the fixing bolt 56, and the spring 58 is arranged between the fixed plate 54 and the extrusion hemispherical head 57, which continuously applies downward thrust to the hemispherical head to ensure that it is close to the wave convex surface 52 to maintain synchronous movement.

[0049] See Figure 1-8 A connecting rod 510 passes through the center of the top of the fixed cylinder 53, and a limiting plate 511 is provided at the bottom of the connecting rod 510. The limiting plate 511 is used to limit the range of movement of the rubber sheet 512; a rubber sheet 512 is installed on the surface of the connecting rod 510, and the rubber sheet 512 covers the bottom of multiple air inlet holes 531, automatically opens during the inhalation process, and remains sealed during exhaust; the limiting plate 511 and the rubber sheet 512 are both arranged above the inside of the fixed cylinder 53, and the rubber sheet 512 opens due to the internal negative pressure during inhalation to ensure one-way entry of gas; an adjusting nut 513 is screwed on the top of the connecting rod 510, and the adjusting nut 513 is located above the fixed cylinder 53. By adjusting the degree of tightening, the pressing force of the limiting plate 511 on the rubber sheet 512 can be adjusted to optimize the air intake sealing effect.

[0050] See Figure 1-8 The specific steps are as follows:

[0051] Step 1: Pour clean water into the tank body 11, then select a high-concentration algae seed for inoculation. Adjust the overall height of the water-discharging lifting mechanism 3 according to the internal water level. The lifting mechanism includes components such as a screw 31, a lifting block 32, a sealing slide 33, a motor 34, and a water-discharging impeller 35. The lifting block 32 is driven up and down by rotating the two screws 31 simultaneously, ensuring that the axis of the water-discharging impeller 35 is above the liquid surface. Start the motor 34 to drive the water-discharging impeller 35 to rotate, thereby forming a stable water circulation and preventing the microalgae from settling to the bottom of the tank due to gravity.

[0052] Step 2: Add nutrients to the interior of the tank body 11. Add urea and potassium dihydrogen phosphate per ton of water once a week. Add nutrients through the stirring area of ​​the water-pumping lifting mechanism 3. With the help of the rotating stirring action of the water-pumping impeller 35, the nutrients are quickly mixed so that the nutrients are evenly distributed in the culture medium, avoiding local nutrient excess or deficiency, and improving the growth efficiency of microalgae.

[0053] Step 3: Ventilate the inside of the runway pool structure 1, start the electric belt conveyor mechanism 2 to control the movement of the circulating ventilation mechanism 4, and the circulating ventilation mechanism 4 runs along the track of the runway groove 14 driven by the moving block 41, while driving the internal air compression mechanism 5 to continuously inhale and compress. The piston plate 55 reciprocates up and down under the linkage of the extrusion hemispherical head 57 and the wave convex surface 52. The compressed air enters the horizontal pipe 46 through the ventilation pipe 45, and is then evenly discharged by multiple air outlet heads 47 to achieve the replenishment of oxygen and carbon dioxide; the horizontal pipe 46 stirs the liquid at the bottom of the pool while moving, effectively preventing microalgae from sinking to the bottom, improving the overall cultivation efficiency and reducing the risk of pool bottom pollution.

[0054] Example 2:

[0055] See Figure 1-3 In this embodiment, the water-draining lifting mechanism 3 consists of two symmetrically arranged trapezoidal screws 31 made of corrosion-resistant 304 stainless steel. Each screw is 500 mm long and has a pitch of 6 mm. The lifting block 32 is injection-molded with polytetrafluoroethylene material, and the surface is covered with a hard anodized layer to enhance wear resistance and water resistance. The motor 34 is a MY6812 DC motor with a rated voltage of 24 V and a maximum speed of 1500 rpm. The motor output shaft is connected to the water-draining impeller 35 through a steel coupling. The water-draining impeller 35 has a diameter of 220 mm and is made of ABS plastic with good corrosion resistance. During the lifting process, the sealing slide 33 fits tightly with the sealing slide groove 17 in the installation box 16 to prevent liquid from seeping out of the open groove 18.

[0056] The existing technology uses a fixed-height stirring impeller structure, and the position of the stirring axis cannot be adjusted when the liquid level changes, resulting in uneven stirring effect and the risk of leakage in the open structure. In contrast, this embodiment significantly improves the stirring stability and sealing safety through a height-adjustable and seal-adaptive water-diverting and lifting mechanism, adapts to cultivation conditions with different irrigation volumes, has strong structural responsiveness, and is more flexible in operation.

[0057] Example 3:

[0058] See Figure 1-5In this embodiment, the electric belt conveyor mechanism 2 is of model DTS-S40, with an adjustable conveying speed range of 10 to 100 mm / s, and the driving component is a stepping motor; the moving block 41 is integrally injection-molded with polyformaldehyde material, and cooperates with the inner convex teeth 15 of the runway groove 14. It is meshed with the steel gear 44 with a diameter of 30 mm through the rotating shaft 43, driving the circulating ventilation mechanism 4 to move along the circular trajectory of the runway groove 14; the air compression mechanism 5 is integrated with the moving block 41 to ensure stable air supply during movement; the ventilation pipe 45 is made of a PVC hard pipe with an inner diameter of 16 mm, and is connected to a horizontal pipe 46 made of a horizontal aluminum alloy pipe at the bottom. The pipe length is 500 mm, and an air outlet head 47 is set every 50 mm on the upper part. There are 10 circular air outlet heads in total, and the air outlet hole diameter is 2 mm.

[0059] Traditional microalgae cultivation systems often use fixed air pipes laid on the bottom of the pond to supply air. This is easily clogged due to the influence of pond bottom sediment, and the inflation area is fixed, with dead corners. This embodiment achieves uniform air supply through the moving path of the circulating ventilation mechanism, avoiding local gas supply shortages and blockages, improving gas utilization and ease of maintenance.

[0060] Example 4:

[0061] See Figure 5-8 In this embodiment, the turntable 51 in the air compression mechanism 5 is made of aluminum alloy CNC machined with a diameter of 80 mm. The surface-processed wave convex surface 52 is symmetrically curved with a height difference of 3 mm and a total of 8 wave peaks; the fixed cylinder 53 is made of polycarbonate, with a cylinder height of 120 mm and a diameter of 60 mm. Eight air inlet holes 531 with a diameter of 3 mm are evenly distributed in a ring on the top, and an exhaust hole 532 with a diameter of 6 mm is opened on the side, which is connected to the Φ12 mm ventilation pipe 45; the internal fixing plate 54 of the fixed cylinder 53 serves as the piston limit reference, and the piston plate 55 is made of silicone rubber with a thickness of 5 mm. It is equipped with two stainless steel fixing bolts 56 and a nylon hemispherical head 57 at the bottom to form an extrusion assembly; the spring 58 is a compression spring with a diameter of 8 mm and a length of 30 mm, and a compression force of 0.3 N / mm. The adjusting nut 513 is screwed on the top of the connecting rod 510 to adjust the pre-pressure of the limit plate 511 on the rubber sheet 512 to ensure air tightness during the intake process.

[0062] Traditional air compression methods mostly rely on motor-driven pumps, which have complex structures, high energy consumption, and are not suitable for installation in motion devices. This embodiment uses the reciprocating motion naturally generated in mechanical transmission to achieve high-efficiency, low-power, and low-noise gas compression. At the same time, with the help of the flow limiting device composed of the valve plate 59 and the rubber sheet 512, the unidirectional flow of gas is ensured, effectively reducing the complexity and maintenance frequency of the compression system.

[0063] Example 5:

[0064] See Figure 2-5In this embodiment, the vent pipe 45 is made of PA12 nylon tube with excellent pressure resistance and is connected to the exhaust end of the air compression mechanism 5; the horizontal pipe 46 is made of thick-walled aluminum alloy tube with a diameter of 15 mm and a length of 600 mm. It is fixed to the end of the vent pipe 45 by a pipe clamp and can slide along the bottom of the pool; the air outlet head 47 is a silicone injection head with an arrangement spacing of 60 mm and a hole diameter of 1.5 mm. Each horizontal pipe is provided with a total of 10 air outlets, and the air flow is vertically upward to form a bubble belt; driven by the electric belt conveyor mechanism 2, the horizontal pipe 46 slides along the periphery of the concentric platform 13, constantly changing the inflation position, thereby disturbing the liquid at the bottom of the pool, enhancing the stirring effect and preventing precipitation.

[0065] Traditional culture tanks are only equipped with fixed air pipes in some parts, which easily leads to the problem of concentrated gas outlet areas and sinking of microalgae in non-gas areas, resulting in uneven culture. The present embodiment realizes dynamic gas distribution at the bottom of the tank through sliding horizontal air outlet pipes, with a wide inflation range and uniform distribution, effectively reducing the risk of air hole blockage and significantly enhancing the integrated stirring and ventilation effect.

[0066] The working principle of the present invention is as follows: after water filling and inoculation, it is necessary to choose whether to lay a sunshade net on the top of the pool body 11 according to the sunshine conditions to control the amount of sunshine. The height of the water-displacing impeller 35 can be adjusted according to the height of the liquid level. During the adjustment, the two screws 31 are rotated simultaneously to control the height movement of the lifting block 32. During the movement, the sealing slide 33 can move with it and always maintain the seal on the open groove 18 to prevent liquid leakage. The height adjustment makes the axis of the water-displacing impeller 35 above the liquid level. The starting motor 34 can drive the water-displacing impeller 35 to rotate and then stir the internal liquid to move the liquid and prevent the microalgae from sinking to the bottom.

[0067] The electric belt conveyor mechanism 2 is started to control the circulation ventilation mechanism 4 to move along the track of the runway groove 14 with the electric belt conveyor mechanism 2. When moving, the gear 44 is driven to rotate by the meshing of the gear 44 and the convex tooth 15, and then the turntable 51 is driven to rotate. Due to the thrust of the spring 58, the squeezing hemispherical heads 57 have a downward thrust, and then the bottoms of the two squeezing hemispherical heads 57 always keep in contact with the wave convex surface 52. The wave-shaped symmetrical design of the wave convex surface 52 ensures that the two squeezing hemispherical heads 57 move up and down together, and the piston plate 55 is driven to reciprocate above the inside of the fixed cylinder 53 by the two fixing bolts 56. Since the rubber sheet 512 has The piston plate 55 has a certain elastic force and the bottom center is limited by the limiting plate 511 to seal the multiple air inlet holes 531. When the piston plate 55 moves downward to form a negative pressure above the interior of the fixed cylinder 53, external air can be sucked in through the air inlet holes 531 so that the air can only move in one direction. At the same time, a valve plate 59 is installed inside the exhaust hole 532, and the mounting shaft is placed on the top. Due to its own weight, the valve plate 59 seals the exhaust hole 532. At the same time, the valve plate 59 can only flip outward to form a limit for the one-way flow of gas. When the piston plate 55 moves back and forth up and down, external air can be sucked in and compressed and then discharged through the vent pipe 45, thereby forming a gas compression work during the movement;

[0068] During the circulation movement, the transverse tube 46 moves along the outer surface of the concentric platform 13 to circulate gas into the pool body 11, and the movement of the transverse tube 46 placed at the bottom can stir the bottom of the pool body 11 to prevent sinking to the bottom. The rotating inflation method can expand the inflation range, and compared with the method of laying a fixed air pipe on the bottom of the pool, it is simple and convenient for subsequent maintenance, and can also prevent problems such as blockage of the air outlet.

[0069] The foregoing is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained herein shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. An efficient microalgae cultivation device, comprising a raceway pool structure (1), characterized in that: The runway pool structure (1) comprises a pool body (11), the pool body (11) is hollow inside and has an open top, a concentric platform (13) is provided at the center of the runway pool structure (1), and an electric belt conveyor mechanism (2) is installed on the upper surface of the concentric platform (13); A runway groove (14) is provided on the surface of the concentric platform (13), and the runway groove (14) is placed outside the electric belt conveyor mechanism (2). A mounting box (16) is provided on one side of the runway pool structure (1), and a water-displacing lifting mechanism (3) is installed inside the mounting box (16). The height of the water-displacing lifting mechanism (3) is adjusted according to the water level. A circulating ventilation mechanism (4) is mounted on the surface of the concentric platform (13), and the circulating ventilation mechanism (4) is used to transport gas through the pool body. The circulating ventilation mechanism (4) includes a moving block (41) fixed to the outside of the electric belt conveyor mechanism (2), and the moving block (41) moves along the track of the runway groove (14); An air compression mechanism (5) is provided on the top of the moving block (41), and the air compression mechanism (5) sucks in and compresses air during the movement of the circulating ventilation mechanism (4).

2. The microalgae efficient cultivation device according to claim 1, characterized in that: A sealing sliding groove (17) is provided downwardly on the inner side of the installation box (16), and an open groove (18) is provided on the outer side of the installation box (16). The water-displacing lifting mechanism (3) includes a screw rod (31) that rotates symmetrically and vertically on the inner side of the installation box (16). A lifting block (32) is slidably installed inside the installation box (16), and the lifting block (32) rotates on the two screw rods (31).

3. The microalgae efficient cultivation device according to claim 2, characterized in that: A sealing slide (33) is fixed on the outside of the lifting block (32), and the bottom of the sealing slide (33) slides on the inside of the sealing slide groove (17). The sealing slide groove (17) always keeps the open groove (18) sealed to prevent liquid leakage. A motor (34) is fixed on the outside of the sealing slide (33), and the output shaft of the motor (34) passes through the sealing slide (33) and the lifting block (32). A water-displacing impeller (35) is installed on the output end of the motor (34), and the water-displacing impeller (35) is placed on the inside of the pool body (11).

4. The microalgae efficient cultivation device according to claim 1, characterized in that: The inner wall of one side of the runway groove (14) is evenly provided with convex teeth (15). The movable block (41) rotates inside and penetrates the rotating shaft (43). The bottom of the rotating shaft (43) is placed inside the gear (44). The gear (44) and the convex teeth (15) are meshed with each other. When the movable block (41) moves along the runway groove (14) with the electric belt conveyor mechanism (2), the rotating shaft (43) rotates.

5. The microalgae efficient cultivation device according to claim 4, characterized in that: A fixed sleeve (42) is provided on one side of the movable block (41), a vent pipe (45) is vertically fixed on the inner side of the fixed sleeve (42), the vent pipe (45) is placed on the periphery of the concentric platform (13), a transverse pipe (46) is transversely provided at the bottom of the vent pipe (45), the transverse pipe (46) is placed on the side of the vent pipe (45) away from the concentric platform (13), and an air outlet head (47) is evenly provided on the top of the transverse pipe (46).

6. The efficient microalgae cultivation device according to claim 5, characterized in that: The air compression mechanism (5) comprises a turntable (51) fixed on the top of the rotating shaft (43) and a fixed cylinder (53) fixed on the upper surface of the moving block (41); the upper surface of the turntable (51) is provided with a wave convex surface (52) along the axis; the interior of the fixed cylinder (53) is hollow; the turntable (51) is placed inside the fixed cylinder (53); a fixed plate (54) is provided inside the fixed cylinder (53); the top of the fixed cylinder (53) is provided with air inlet holes (531) evenly along the axis; an exhaust hole (532) is provided above one side of the fixed cylinder (53); the top of the vent pipe (45) is connected to the exhaust hole (532); a valve plate (59) is hinged above the exhaust hole (532); and the valve plate (59) can only be flipped outward.

7. The efficient microalgae cultivation device according to claim 6, characterized in that: A piston plate (55) is slidably mounted inside the fixed cylinder (53), and the piston plate (55) is placed above the fixed plate (54). A fixing bolt (56) is symmetrically arranged at the bottom of the piston plate (55), and both of the fixing bolts (56) pass through the fixed plate (54). An extrusion hemispherical head (57) is arranged at the bottom of the fixing bolt (56), and the bottoms of the two extrusion hemispherical heads (57) are in contact with the wave convex surface (52) respectively. A spring (58) is sleeved on the surface of the fixing bolt (56), and the spring (58) is placed between the fixed plate (54) and the extrusion hemispherical head (57). The spring (58) applies a downward thrust to the extrusion hemispherical head (57).

8. The efficient microalgae cultivation device according to claim 6, characterized in that: A connecting rod (510) passes through the center of the top of the fixed cylinder (53); a limiting plate (511) is provided at the bottom of the connecting rod (510); a rubber sheet (512) is installed on the surface of the connecting rod (510); the limiting plate (511) and the rubber sheet (512) are placed above the interior of the fixed cylinder (53); the rubber sheet (512) seals the bottoms of the multiple air inlet holes (531); an adjusting nut (513) is screwed on the top of the connecting rod (510); and the adjusting nut (513) is placed above the fixed cylinder (53).

9. A method for using any device according to claims 1-8, characterized in that: The specific steps are as follows: Step 1: Inject clean water into the pool body (11), then select a high-concentration algae species for inoculation, adjust the overall height of the water-dispensing lifting mechanism (3) according to the height of the internal water level, start the motor (34) to stir the water through the water-dispensing impeller (35), thereby allowing the liquid inside the runway pool structure (1) to flow; Step 2: Add nutrients to the interior of the tank body (11), add 2 shells of urea and 1 gram of potassium dihydrogen phosphate per ton of water, and replenish once a week. Add nutrients through the stirring area of ​​the water-dispensing lifting mechanism (3) to ensure uniform nutrient distribution during rapid stirring; Step 3: Ventilate the interior of the runway pool structure (1), start the electric belt conveyor mechanism (2) to control the movement of the circulating ventilation mechanism (4), thereby compressing the air through the air compression mechanism (5) and passing it into the interior of the horizontal pipe (46), and inflating it upward through the air outlet head (47) to replenish oxygen and carbon dioxide. At the same time, the movement of the horizontal pipe (46) at the bottom of the pool can stir the bottom to prevent the microalgae from sinking to the bottom.

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