Dunaliella salina purification and separation equipment and method

Abstract

Dunaliella salina purification and separation equipment comprises a bottom bin, a separation bin, a feeding mechanism, a separation barrel, a motor and a screening plate, the separation bin is arranged at the top of the bottom bin, the feeding mechanism is used for conveying materials into the separation barrel for primary separation, the motor drives the feeding mechanism and the separation barrel to rotate, and a second spiral blade and a first spiral blade are arranged inside and outside the separation barrel respectively; the filtering holes are formed in the cylinder body, the deposition plate, the baffle, the flow dividing mechanism and the screening plate are arranged in the bottom bin, and secondary screening and automatic flow dividing of materials can be achieved; the equipment can effectively solve the problems of unsmooth feeding, material accumulation, non-uniform screening, incomplete impurity discharge and the like in the existing equipment, and realizes efficient and continuous purification and separation treatment of dunaliella salina materials.

Description

Technical Field

[0001] The present invention belongs to the field of bioengineering technology, and in particular relates to a device and method for purifying and separating Dunaliella salina. Background Art

[0002] Dunaliella is a microalgae resource with significant medicinal and nutritional value, widely used in medicine, healthcare, cosmetics, and food additives. Its industrial application typically requires processing the raw algae through extraction, separation, and purification to obtain a high-purity product. However, due to the small cell structure of Dunaliella, its density is close to that of impurities, and it is prone to agglomeration, existing separation equipment generally suffers from the following problems:

[0003] First, traditional equipment mostly uses a single-stage screw conveyor or centrifugal separation structure. When conveying and preliminarily grading materials, it is easy for problems such as material accumulation and blockage to occur in the conveying pipeline. This is especially obvious when the fluidity of wet materials is poor, resulting in reduced equipment operating efficiency.

[0004] Secondly, existing separation structures lack efficient material pre-spreading devices. Materials often accumulate irregularly within the separation chamber, making it difficult to evenly distribute them across the filtration or screening area, impacting subsequent separation and screening accuracy. Even in some systems equipped with a stirring mechanism, the single power transmission path can lead to asynchronous stirring and separation, further reducing separation efficiency.

[0005] Thirdly, the impurity removal and screening steps in the purification process lack an intelligent linkage mechanism, and cannot achieve effective diversion according to the density and weight differences of different materials. This can easily cause problems such as mixing of screening materials and secondary contamination, affecting the purity and stability of the final product.

[0006] In summary, the salt algae separation devices currently on the market generally have technical problems such as poor material transportation, uneven separation, incomplete impurity discharge, and poor screening accuracy, which make it difficult to meet the industrial needs of high efficiency, automation and refined processing. Summary of the Invention

[0007] In response to the problems existing in the prior art, the purpose of the present invention is to provide a salt algae purification and separation device and method, which can achieve a reasonable structure, significant separation effect, and the ability to achieve multi-stage screening and automated control to solve the above problems.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A salt algae purification and separation device, the technical key points of which are: comprising a bottom bin, a separation bin provided on the top of the bottom bin, a slag discharge pipe provided at one end of the separation bin, and a feeding mechanism provided at the other end of the separation bin;

[0010] A separation cylinder is provided inside the separation bin;

[0011] The material to be separated is transported to the separation cylinder through the feeding mechanism, and the separation cylinder separates and purifies the material;

[0012] A motor is provided above one end of the separation bin, and the motor provides power for the rotation of the separation cylinder and the feeding mechanism;

[0013] A screening plate is provided inside the bottom bin, and the screening plate is used to separate and purify the materials falling into the bottom bin.

[0014] Furthermore, the feeding mechanism includes a feeding bin connected to the bottom bin, a feeding pipe is connected to the top of one end of the feeding bin, and a driving shaft is rotatably connected to the inside of the feeding bin, and a third spiral blade is connected to the driving shaft;

[0015] The material in the feeding bin is transported to the separation cylinder by the rotation of the third spiral blade.

[0016] Furthermore, the interior of the separation cylinder is provided with a second spiral blade, and the exterior of the separation cylinder is provided with a first spiral blade, and filtering holes are uniformly opened through the separation cylinder.

[0017] Furthermore, inner supports are sleeved on the driving shaft at equal intervals, and one end of the inner support is connected to the inner wall of the separation cylinder;

[0018] The other end of the driving shaft is connected to the output end of the motor via a belt or a chain.

[0019] Furthermore, a deposition plate and a baffle are obliquely arranged inside the bottom bin, and a gap is left between the bottom end of the baffle and the deposition plate;

[0020] The separated materials fall onto the sedimentation plate;

[0021] The outer rotation of the baffle is connected with a diversion mechanism.

[0022] Furthermore, the diversion mechanism includes a flap, both ends of which are rotatably connected to positioning heads, which are connected to the bottom bin;

[0023] When there is no external force, the flap seals the gap between the baffle and the deposition plate.

[0024] Furthermore, counterweights are provided on the outer side of the flap at equal intervals along its length.

[0025] Furthermore, a connecting plate is fixedly connected to the contact surface between the positioning head and the flap, and a fixing seat is connected to the contact surface between the positioning head and the bottom bin.

[0026] Furthermore, the upper end of the screening plate is located below the deposition plate, and screening holes are evenly opened on the screening plate, and blocking bars are evenly spaced on the upper end surface of the screening plate.

[0027] A method for purifying and separating Dunaliella salina, characterized by comprising the following steps:

[0028] The first step is to inject the material containing salt algae into the feeding bin through the feeding pipe;

[0029] Step 2: Start the motor to drive the drive shaft and the third spiral blade to rotate and transport the material into the separation cylinder;

[0030] The third step: During the rotation of the separation cylinder, the material is preliminarily screened through the filter holes. The qualified salt algae are evenly distributed on the inner wall of the separation cylinder under the action of the second spiral blade, and the impurities that do not meet the requirements are discharged along the direction of the second spiral blade to one end of the separation chamber and discharged through the slag discharge pipe;

[0031] Step 4: The qualified salt algae are guided by the first spiral blade and settle onto the sedimentation plate and baffle in the bottom bin;

[0032] Step 5: When the weight of the material reaches the preset value, push the flap open to allow the material to fall onto the screening plate, and flow slowly under the action of the baffle to complete the re-screening.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention arranges a drive shaft and a third spiral blade in the feeding bin, and realizes the synchronous operation of the feeding mechanism and the separation cylinder under the drive of the motor, which can effectively avoid the accumulation and blockage of materials during the transportation process, improve the feeding stability and efficiency, and solve the problems of poor material fluidity and poor feeding in existing equipment.

[0035] By arranging the second spiral blade and the first spiral blade inside and outside the separation cylinder respectively, and opening the filter holes on the cylinder body, the graded screening and path diversion of the material in the rotating state are realized. The second spiral blade is used to spread the material passing through the filter hole evenly on the inner wall to avoid accumulation and blockage, and the first spiral blade is used to guide and transport qualified materials, effectively improving the separation uniformity and screening efficiency, and solving the problems of uneven separation and poor screening accuracy in the traditional structure.

[0036] An internal support structure that rotates coaxially with the separation cylinder is set on the outside of the separation cylinder, which not only ensures the stable linkage between the separation cylinder and the feeding mechanism, but also improves the structural strength and coaxial accuracy of the equipment during long-term operation, avoiding the obstruction of the separation process due to shaft deviation or structural looseness.

[0037] The sedimentation plate and baffle structure installed inside the bottom bin realizes the temporary storage of qualified materials, and the flap structure in the diversion mechanism automatically opens when the material reaches a certain weight, allowing the material to fall evenly onto the screening plate below for secondary screening. This solves the problem that existing equipment cannot automatically divert according to changes in material weight, and improves the stability and automation level of material transfer.

[0038] Screening holes and multiple baffle structures are set on the surface of the screening plate, so that the falling materials can flow slowly and be fully screened in a confined space, improving the integrity and accuracy of material screening, and solving the problem of insufficient screening and insufficient purity caused by excessive flow rate in traditional equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a structural schematic diagram of the present invention;

[0040] Figure 2 for Figure 1 A magnified schematic diagram of point A in the middle;

[0041] Figure 3 It is a structural schematic diagram of the feeding mechanism of the present invention;

[0042] Figure 4 This is a schematic structural diagram of the bottom bin of the present invention;

[0043] Figure 5 It is a structural schematic diagram of the diversion mechanism of the present invention;

[0044] Figure 6 for Figure 5 A magnified schematic diagram of point B in the middle;

[0045] Figure 7 Schematic diagram of the structure of the screening plate of the present invention;

[0046] Figure 8 for Figure 7 Enlarged schematic diagram of point C in the middle.

[0047] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0048] 1. Bottom bin; 11. Sedimentation plate; 12. Baffle; 13. Diversion mechanism;

[0049] 131. Flap; 132. Positioning head; 1321. Connecting plate; 1322. Fixed seat; 133. Counterweight;

[0050] 2. Separation bin; 21. Slag discharge pipe;

[0051] 3. Separation cylinder; 31. First spiral blade; 32. Second spiral blade; 33. Filter hole;

[0052] 4. Motor;

[0053] 5. Feeding mechanism;

[0054] 51. Feeding bin; 511. Feeding pipe; 52. Driving shaft; 53. Third spiral blade; 54. Internal support frame;

[0055] 6. Screening plate; 61. Screening hole; 62. Baffle bar. DETAILED DESCRIPTION

[0056] 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 specifically claimed in the present invention.

[0057] Example 1:

[0058] See Figure 1-8 , a salt algae purification and separation equipment includes a bottom bin 1, which is used to receive the screened salt algae material and complete the final screening process; a separation bin 2 is provided on the top of the bottom bin 1, and a separation cylinder 3 for material separation is installed inside the separation bin 2, and the separation cylinder 3 screens the material through the filter holes 33 provided thereon; a slag discharge pipe 21 is provided at one end of the separation bin 2, and the slag discharge pipe 21 is used to discharge impurity materials that do not meet the standards to the outside of the equipment; a feeding mechanism 5 is provided at the other end of the separation bin 2, and the feeding mechanism 5 is used to evenly feed the material to be separated into the interior of the separation cylinder 3; a motor 4 is provided above one end of the separation bin 2, and the motor 4 provides synchronous rotation power for the feeding mechanism 5 and the separation cylinder 3; a screening plate 6 is provided inside the bottom bin 1, and the screening plate 6 receives the qualified salt algae material falling from the sedimentation plate 11 and the baffle 12, and realizes re-fine screening through the screening holes 61 and the baffle bars 62.

[0059] See Figure 1-3 The feeding mechanism 5 includes a feeding bin 51 connected to the bottom bin 1. The feeding bin 51 is a closed structure, which can prevent the material from being contaminated by the external environment during the transportation process; a feeding pipe 511 is connected to the top of one end of the feeding bin 51, and the feeding pipe 511 is used as a feeding channel to introduce the original salt algae material into the feeding bin 51; the internal rotation of the feeding bin 51 is connected to the driving shaft 52, and the driving shaft 52 is driven by the motor 4 to realize the rotation movement; a plurality of third spiral blades 53 are connected to the driving shaft 52, and the third spiral blades 53 are arranged at equal intervals along the axial direction of the feeding bin 51, and are used to push the material into the separation cylinder 3 along the feeding direction and maintain a continuous feeding state.

[0060] See Figure 1-2A second spiral blade 32 is provided inside the separation cylinder 3. The second spiral blade 32 is used to evenly spread the material entering the separation cylinder 3 and spread it along the inner wall, so that the salt algae material that meets the requirements is attached to the inner side of the separation cylinder 3 for full separation; a first spiral blade 31 is provided outside the separation cylinder 3. The first spiral blade 31 is attached to the outer wall of the cylinder and is used to guide the qualified materials after screening to be transported downward to the inside of the bottom bin 1; filter holes 33 are evenly opened on the separation cylinder 3. The aperture of the filter hole 33 is customized according to the target salt algae size, which is used to realize the primary screening function and separate the qualified materials from large particles of impurities.

[0061] See Figure 1-3 A plurality of inner supports 54 are equally spaced on the drive shaft 52, and the inner supports 54 are respectively connected to the inner side walls of the separation cylinder 3 to form a rigid support structure to maintain the rotation coaxiality and stability of the separation cylinder 3; the other end of the drive shaft 52 is connected to the output end of the motor 4 through a belt or chain, and the belt or chain is a closed-loop structure, which can stably transmit the power of the motor 4 to the drive shaft 52, ensuring that the feeding mechanism 5 and the separation cylinder 3 rotate at the same time and realize linkage operation.

[0062] See Figure 4-6 The bottom bin 1 is internally inclined with a deposition plate 11 and a baffle 12. The deposition plate 11 is used to receive the material falling from the outside of the separation cylinder 3 after primary screening, and its inclination is set to facilitate the material to slide to the lower area; the baffle 12 is vertically arranged above the deposition plate 11 and a gap is left between its bottom and the deposition plate 11. The gap is used to control the secondary flow path of qualified materials and limit the entry of impurities; the external rotation of the baffle 12 is connected to a diversion mechanism 13, which controls whether the material continues to flow to the screening plate 6.

[0063] See Figure 4-6 The diversion mechanism 13 includes a flap 131, which is arranged below the baffle 12 in a transversely swingable manner, and both ends of the flap 131 are rotatably connected to positioning heads 132, which are fixedly installed on the side wall of the bottom bin 1, and are used to constrain the swing angle of the flap 131 and maintain its closed position under no-load state; when there is no external force, the flap 131 is in a horizontal state, which can seal the gap between the baffle 12 and the deposition plate 11 to prevent materials from leaking prematurely.

[0064] See Figure 5 A plurality of counterweight blocks 133 are arranged at equal intervals on the outer surface of the flap 131 along its length direction. The counterweight blocks 133 are used to provide self-restoring force when the flap 131 is not subjected to material pressure, so that the flap 131 returns to its original position and realizes the automatic sealing function, thereby ensuring the airtightness and stability of the flap 131 in the non-working state.

[0065] See Figure 4-6A connecting plate 1321 is fixedly connected to the contact surface of the positioning head 132 and the flap 131, and the connecting plate 1321 improves the strength of the positioning structure and prevents the connection from loosening; a fixing seat 1322 is connected to the contact surface of the positioning head 132 and the bottom bin 1, and the fixing seat 1322 provides a stable installation platform for the positioning head 132, making the rotation connection of the diversion mechanism 13 more reliable and extending the service life.

[0066] See Figure 7-8 The upper end of the screening plate 6 is located below the sedimentation plate 11. The screening plate 6 is a porous metal structure with screening holes 61 evenly distributed therethrough for fine screening of the salt algae material falling from the flip plate 131. Baffles 62 are arranged at equal intervals on the upper end surface of the screening plate 6. The baffles 62 are arranged in the shape of transverse convex strips to slow down the sliding speed of the material on the screening plate 6, making the screening action more sufficient and effectively improving the screening purity of the salt algae.

[0067] A method for purifying and separating Dunaliella salina, characterized by comprising the following steps:

[0068] The first step is to inject the mixed salt algae material into the feeding bin 51 through the feeding pipe 511, and the driving shaft 52 in the feeding bin 51 and the third spiral blade 53 connected thereto rotate at a set speed so that the material is continuously pushed into the separation cylinder 3;

[0069] The second step is to start the motor 4, drive the drive shaft 52 and its connected feeding mechanism 5 and the separation cylinder 3 to rotate synchronously through a belt or chain to achieve integrated feeding and separation operations;

[0070] Step 3: During the rotation of the separation drum 3, the material is pressed against the inner wall of the separation drum 3 by the combined action of gravity and the centrifugal force of rotation, and is initially screened through the filter holes 33. The salt algae material that meets the particle size requirements is evenly spread on the inner wall of the separation drum 3 by the action of the second spiral blade 32, while the impurities that do not meet the requirements are spirally pushed along the second spiral blade 32 to one end of the separation chamber 2 and discharged through the slag discharge pipe 21.

[0071] Step 4: The qualified Dunaliella salina slides from the outside of the separation cylinder 3 to the area between the sedimentation plate 11 and the baffle 12 of the bottom bin 1 under the guidance of the first spiral blade 31;

[0072] Step 5: When the material in the area accumulates to the set weight, the flap 131 is pressed under the action of gravity and swung open, and the material flows from the gap to the surface of the screening plate 6; the screening plate 6 is separated again through the screening hole 61, and the baffle 62 slows down the flow rate of the material, thereby realizing the secondary fine screening separation of the salt algae.

[0073] Example 2:

[0074] See Figure 1-3This embodiment provides a solution for feeding through the drive shaft 52 and the third spiral blade 53 in the feeding mechanism 5. The feeding bin 51 is made of stainless steel 304, the drive shaft 52 has an outer diameter of Φ20 mm, and is made of carbon steel 45 that has been quenched and tempered. The spiral blade 53 is made of polytetrafluoroethylene (PTFE), has an outer diameter of Φ48 mm, and a pitch of 40 mm, which is suitable for high-viscosity salt algae mixtures. During use, the motor 4 is a Y802-4 three-phase asynchronous motor with a rated power of 0.75 kW. The drive shaft 52 rotates at a speed of 80 rpm, driving the spiral blade 53 to stably transport the material to the inside of the separation cylinder 3. The entire feeding process is continuous and uniform, avoiding material jamming and accumulation.

[0075] The traditional solution adopts a feeding method with an ordinary vertical feeding structure. When using high-humidity salt algae materials, problems such as poor feeding and accumulation at the bottom of the feeding pipe often occur, resulting in frequent equipment shutdowns for cleaning and low operating efficiency. In contrast, the spiral feeding structure in this embodiment effectively solves this problem and improves the smoothness and automation level of feeding.

[0076] Example 3:

[0077] See Figure 1-2 In this embodiment, the separation cylinder 3 is made of stainless steel 316L, with a thickness of 4 mm, a length of 450 mm, and an outer diameter of Φ300 mm. A total of 180 filter holes 33 with a diameter of Φ1.2 mm are evenly arranged on the cylinder. A second spiral blade 32 is set on the inside, made of PA66 nylon, with a pitch of 50 mm, which is used to spread the qualified materials entering the filter holes on the cylinder wall; a first spiral blade 31 is set on the outside to guide the material downward. The blade is welded from stainless steel sheets and has a pitch of 80 mm. During the rotation of the cylinder, this structure uses the rotating centrifugal force to stably distribute and efficiently screen the materials, and large particles of impurities are automatically pushed out of the cylinder.

[0078] The traditional solution uses existing equipment with a single-layer mesh screen separation structure. Due to mesh blockage and uneven material distribution, the screening efficiency is low and the screening accuracy is limited, which easily leads to the problem of high screening leakage rate. In contrast, this embodiment realizes a continuous and uniform screening process through the combination of internal and external double helices and evenly distributed filter holes.

[0079] Example 4:

[0080] See Figure 1-3In this embodiment, three inner supports 54 are arranged at equal intervals between the drive shaft 52 and the separation cylinder 3. They are made of aluminum alloy 6061-T6 and have a radial support bar structure. The support end is welded to the inner wall of the cylinder, and the other end is fixed to the drive shaft 52. A stable power linkage system is formed through this structure; the motor 4 is connected to the drive shaft 52 through a B-type V-belt, and the pulley diameter ratio is 2:1, so that the cylinder speed is constant at 60rpm, effectively avoiding shaft deviation and vibration problems during operation.

[0081] In some existing equipment of traditional solutions, the separation cylinder and the feeding mechanism are not supported by structural fixation, but are only connected by bearing suspension. During long-term operation, cylinder swing, resonance and eccentric friction are prone to occur, resulting in equipment damage and reduced screening efficiency. In contrast, this embodiment ensures operational stability and coaxial accuracy through an internal support frame.

[0082] Example 5:

[0083] See Figure 4-6 In this embodiment, the sedimentation plate 11 and the baffle 12 are made of stainless steel plates, with an inclination angle set to 25°. A flap 131 is provided below the baffle 12. The flap 131 is made of carbon steel with a thickness of 4 mm and 6 lead counterweights 133 are fixedly installed along its length, each weighing 100 g. When the weight of the material behind the baffle 12 exceeds 1.2 kg, the flap 131 flips open under the action of gravity, and the material automatically slides from the gap to the screening plate 6 below. The two ends of the flap are rotatably connected to the connecting plate 1321 through the positioning head 132 and fixed on the fixing seat 1322 of the bottom bin 1 to achieve accurate positioning and restoration of closure.

[0084] Traditional solutions and existing equipment generally use manual switches or pneumatic valves to control material dropping, which cannot achieve real-time linkage according to the material accumulation situation, easily causing premature or delayed material dropping, affecting the screening rhythm and stability; this embodiment improves the degree of operation automation through an adaptive flap structure.

[0085] Example 6:

[0086] See Figure 7-8 The screening plate 6 is made of perforated stainless steel plate with a size of 300mm×400mm and a pore size of Φ0.8mm. Ten polymer polyurethane bars 62 are installed on the plate surface, each with a width of 15mm and a height of 8mm, and are arranged at equal intervals along the length of the screening plate; the screened material falls from the flap 131, and after falling on the surface of the screening plate 6, it moves slowly under the damping action of the bar 62, preventing the material from sliding out of the screen surface quickly due to gravity, ensuring that each particle stays on the screen surface for a sufficient time, thereby improving the screening accuracy.

[0087] In the existing devices of the traditional solution, the surface of the screening plate is flat and has no damping structure. After the material falls, it slides quickly to the collection port, resulting in a too short screening time and some insufficiently separated materials entering the final product. In contrast, the setting of the baffle in this embodiment effectively extends the material residence time and improves the screening integrity and purity.

[0088] The working principle of the present invention is:

[0089] During use, the material to be purified is fed into the feed bin 51 through the feed pipe 511, and the drive shaft 52 is driven by the motor 4 to rotate. When the drive shaft 52 rotates, the third spiral blade 53 and the separation cylinder 3 will rotate synchronously.

[0090] When the third spiral blade 53 rotates, the material in the feeding bin 51 is transported to the separation cylinder 3;

[0091] During the rotation of the separation cylinder 3, the second spiral blade 32 and the first spiral blade 31 will be driven to rotate synchronously. During the rotation, the material that meets the setting will pass through the filter hole 33. The second spiral blade 32 inside the separation cylinder 3 will evenly spread the material inside the separation cylinder 3 on the inner wall of the separation cylinder 3, thereby preventing the material from accumulating inside the separation cylinder 3.

[0092] The materials that do not meet the requirements will be transferred to one end of the separation bin 2 as the second spiral blade 32 rotates, and discharged through the slag discharge pipe 21;

[0093] The first spiral blade 31 rotating outside the separation cylinder 3 can evenly spread the screened materials on the deposition plate 11 and baffle 12 located below the separation cylinder 3;

[0094] When the material falling on the deposition plate 11 and the baffle 12 reaches a set weight, the material will push the flap 131 open, allowing the material to flow evenly onto the screening plate 6 and be screened again by the screening plate 6. The baffle 62 set on the screening plate 6 can slow down the flow speed of the material on the screening plate 6.

[0095] 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. A device for purifying and separating Dunaliella salina, characterized by: It comprises a bottom bin (1), a separation bin (2) is provided on the top of the bottom bin (1), a slag discharge pipe (21) is provided at one end of the separation bin (2), and a feeding mechanism (5) is provided at the other end of the separation bin (2); A separation cylinder (3) is provided inside the separation bin (2); The material to be separated is transported to the separation cylinder (3) through the feeding mechanism (5), and the material is separated and purified by the separation cylinder (3); A motor (4) is provided above one end of the separation bin (2), and the motor (4) provides power for the rotation of the separation cylinder (3) and the feeding mechanism (5); A screening plate (6) is provided inside the bottom bin (1), and the screening plate (6) is used to separate and purify the materials that fall into the bottom bin (1).

2. The equipment for purifying and separating salt algae according to claim 1, wherein: The feeding mechanism (5) comprises a feeding bin (51) connected to the bottom bin (1), a feeding pipe (511) is connected to the upper end of the feeding bin (51), and a driving shaft (52) is rotatably connected inside the feeding bin (51), and a third spiral blade (53) is connected to the driving shaft (52); The material in the feeding bin (51) is transported to the separation cylinder (3) by the rotation of the third spiral blade (53).

3. The equipment for purifying and separating salt algae according to claim 1, wherein: A second spiral blade (32) is provided inside the separation cylinder (3), and a first spiral blade (31) is provided outside the separation cylinder (3). Filter holes (33) are evenly distributed throughout the separation cylinder (3).

4. The equipment for purifying and separating Dunaliella salina according to claim 2, wherein: The driving shaft (52) is sleeved with inner support frames (54) at equal intervals, and one end of the inner support frame (54) is connected to the inner side wall of the separation cylinder (3); The other end of the drive shaft (52) is connected to the output end of the motor (4) via a belt or a chain.

5. The equipment for purifying and separating Dunaliella salina according to claim 1, characterized in that: A deposition plate (11) and a baffle (12) are obliquely arranged inside the bottom bin (1), with a gap being left between the bottom end of the baffle (12) and the deposition plate (11); The separated material falls onto the deposition plate (11); The outer portion of the baffle (12) is rotatably connected to a diversion mechanism (13).

6. The equipment for purifying and separating Dunaliella salina according to claim 5, characterized in that: The diversion mechanism (13) includes a flap (131), both ends of the flap (131) are rotatably connected to positioning heads (132), and the positioning heads (132) are connected to the bottom bin (1); When no external force is applied, the flap (131) seals the gap between the baffle (12) and the deposition plate (11).

7. The equipment for purifying and separating Dunaliella salina according to claim 6, characterized in that: Counterweight blocks (133) are arranged on the outer surface of the flap (131) at equal intervals along its length direction.

8. The equipment for purifying and separating Dunaliella salina according to claim 7, characterized in that: A connecting plate (1321) is fixedly connected to the contact surface between the positioning head (132) and the flap (131), and a fixing seat (1322) is connected to the contact surface between the positioning head (132) and the bottom bin (1).

9. The equipment for purifying and separating Dunaliella salina according to claim 5, characterized in that: The upper end of the screening plate (6) is located below the deposition plate (11), and screening holes (61) are evenly distributed through the screening plate (6). Baffles (62) are evenly spaced on the upper end surface of the screening plate (6).

10. A method for purifying and separating Dunaliella salina, characterized in that: The steps include: The first step is to inject the material containing salt algae into the feeding bin (51) through the feeding pipe (511); The second step is to start the motor (4), drive the drive shaft (52) and the third spiral blade (53) to rotate, and transport the material into the separation cylinder (3); Step 3: During the rotation of the separation cylinder (3), the material is preliminarily screened through the filter hole (33), and the salt algae that meet the requirements are evenly distributed on the inner wall of the separation cylinder (3) under the action of the second spiral blade (32), while the impurities that do not meet the requirements are discharged along the direction of the second spiral blade (32) to one end of the separation chamber (2) and discharged through the slag discharge pipe (21); Step 4: The qualified salt algae are guided by the first spiral blade (31) and settle onto the sedimentation plate (11) and the baffle (12) in the bottom bin (1); Step 5: When the weight of the material reaches the preset value, push open the flap (131) to allow the material to fall onto the screening plate (6) and flow slowly under the action of the baffle (62) and complete the screening again.

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