Seepage type large-flux algae culture device for water purification

Abstract

The invention belongs to the technical field of aquaculture engineering, and particularly relates to a seepage type large-flux algae culture device for water purification, which comprises a support frame, a bolting-silk net and a fairing, the support frame is of a hollow cylindrical structure, the bolting-silk net is a cylindrical flexible netting with a closed bottom and an open top, the fairing is of a cylindrical structure with a closed bottom and an open top, and the fairing is of a hollow cylindrical structure. A water inlet and a water outlet are formed in the fairing, a height difference exists between the water outlet and the water inlet, and a spiral rectifying plate is arranged between the water inlet and the water outlet in the fairing in the height direction; the bolting-silk net is located in the spiral rectifying plate, and the supporting frame is located in the bolting-silk net. According to the invention, the flowing effect of outer-layer culture water is utilized, so that the internal algae culture solution and the external culture water maintain permeation exchange, the bolting-silk net does not directly hinder water flow, the water flux is large, the algae water purification module can be conveniently embedded into a circulating water culture system, and the problems of culture solution overflow, water shortage, difficulty in algae collection, difficulty in filter screen cleaning and the like are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of aquaculture engineering, in particular to a seepage-type large-flux algae cultivation device for water purification. Background Art

[0002] During recirculating aquaculture, long-term closed, recycled water is prone to nitrate accumulation, sometimes reaching levels as high as 200 mg / L or even higher. High nitrate concentrations are detrimental to the healthy growth of aquaculture organisms. In addition to denitrification, using algae to remove nitrate from aquaculture water is a viable option, with microalgae being the most efficient. However, due to their small size, microalgae easily clog filters and have low water flux, making them difficult to maintain stability and independence within aquaculture systems. Currently, they can only be used for water purification in tailwater treatment ponds. Developing a water purification system that maintains high water flux and facilitates algae cultivation and collection is key to solving these problems.

[0003] Currently, common algae cultivation devices include pipeline photobioreactors, columnar photobioreactors, raceway pool algae cultivation equipment, etc., which aim to cultivate algae at high density. They are all closed or intermittent inlet and outlet algae cultivation equipment, which cannot achieve high water flux through them and cannot solve the above problems. Summary of the Invention

[0004] In view of the above-mentioned problems existing in the existing algae cultivation devices, the object of the present invention is to provide a seepage-type large-flux algae cultivation device for water purification.

[0005] The object of the present invention is achieved through the following technical solutions: The present invention includes a supporting frame, a screen mesh and a fairing, wherein the supporting frame is a hollow cylindrical structure, the screen mesh is a cylindrical flexible net with a closed bottom and an open top, and the fairing is a cylindrical structure with a closed bottom and an open top, a water inlet and a water outlet are respectively provided on the fairing, and there is a height difference between the water outlet and the water inlet, and a spiral rectifier plate is provided inside the fairing between the water inlet and the water outlet along the height direction; the screen mesh is located inside the spiral rectifier plate, and the supporting frame is located inside the screen mesh; the algae to be cultivated are placed from the top of the screen mesh, and the aquaculture water flowing into the water inlet rotates upward along the rectifier plate from bottom to top, and then flows out from the water outlet. During the flow of the aquaculture water, it enters the interior of the screen mesh through the screen mesh, cultivates the algae and forms a culture solution, and as the aquaculture water continues to flow, the aquaculture water flowing in from the outside and the culture solution of the algae cultivated in the screen mesh undergo osmotic exchange, thereby purifying the aquaculture water.

[0006] Wherein: the support frame is in a transparent cylindrical shape, the bottom of the support frame is closed or has an open structure, and the top of the support frame has an open structure.

[0007] The support frame is provided with a plurality of groups of hollow holes along the height direction, and each group of the hollow holes is a plurality of holes provided along the circumferential direction, and the number of the hollow holes in each group is the same, thereby forming a plurality of rows of hollow holes provided along the circumferential direction.

[0008] A gap is left between the outer side surface of the support frame and the inner edge of the rectifying plate, and the sieve mesh is located in the gap.

[0009] The mesh number of the sieve is 20 to 400, and the interior is used for cultivating algae. The sieve is tightly sleeved on the periphery of the support frame, and a gap is left between the sieve and the inner edge of the rectifier plate to facilitate the insertion or removal of the sieve.

[0010] The sieve mesh and the supporting frame are taken out from the fairing together when the algae are harvested, and are collected and cleaned.

[0011] The water inlet is close to the bottom of the fairing, the water outlet is close to the top of the fairing, and the water inlet and the water outlet are tangent to the outer side surface of the fairing along the direction of water flow.

[0012] The upper and lower ends of the rectifier plate extend to the water outlet and the water inlet respectively.

[0013] The advantages and positive effects of the present invention are: 1. This invention utilizes the flow of the outer aquaculture water to maintain osmotic exchange between the internal algae culture medium and the external aquaculture water. The silk screen does not directly obstruct the water flow, resulting in a high water flux. This allows the algae water purification module to be easily integrated into the recirculating aquaculture system, solving problems such as culture medium overflow and water shortage, laborious algae collection, and difficult filter cleaning.

[0014] 2. The present invention utilizes the pressure difference generated by the flow rate difference between the inner and outer layers of water to achieve osmotic water exchange, meeting the exchange requirements of nutrient salts while ensuring a large water flux.

[0015] 3. The algae culture water of the present invention remains independent and can be easily taken out, making it easy to collect and clean the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the support frame of the present invention; Figure 3 It is a structural schematic diagram of the screen silk mesh of the present invention; Figure 4 It is a structural schematic diagram of the fairing of the present invention; Among them: 1 is the supporting frame, 2 is the screen mesh, 3 is the fairing, 4 is the water inlet, 5 is the water outlet, 6 is the rectifier plate, and 7 is the hollow hole. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] like Figures 1 to 4 As shown, the present invention is made of transparent material as a whole, and includes a supporting frame 1, a sieve mesh 2 and a fairing 3, wherein the supporting frame 1 is a hollow cylindrical structure, the sieve mesh 2 is a cylindrical flexible mesh with a closed bottom and an open top, and the fairing 3 is a cylindrical structure with a closed bottom and an open top. A water inlet 4 and a water outlet 5 are respectively provided on the fairing 3, and there is a height difference between the water outlet 5 and the water inlet 4. A spiral rectifier plate 6 is provided in the fairing 3 between the water inlet 4 and the water outlet 5 along the height direction to ensure that the water flows evenly from bottom to top along the rectifier plate 6; the sieve mesh 2 is located inside the spiral rectifier plate 6, and the sieve mesh 2 can fully maintain contact with the water flow, and the supporting frame 1 is located inside the sieve mesh 2.

[0019] The support frame 1 of this embodiment is a transparent cylindrical structure, made of plastic, and is used to support the sieve mesh 2. The bottom of the support frame 1 can be closed or open, while the top is open. The support frame 1 has multiple groups of hollow holes 7 along its height. Each group of hollow holes 7 is arranged along the circumference, with the number of hollow holes 7 being the same, thus forming multiple rows of hollow holes 7 arranged along the circumference. A gap, preferably 3 to 5 mm, is left between the outer side of the support frame 1 and the inner edge of the rectifier plate 6. The sieve mesh 2 is positioned within this gap.

[0020] In this embodiment, the mesh 2 is a transparent, cylindrical structure with a diameter of 300 to 400 mm, made of plastic. It is used for cultivating algae. The interior of the mesh 2 is used for cultivating algae. The mesh size of the mesh 2 can range from 20 to 400, depending on the type of algae being cultivated. The mesh 2 is taller than the support frame 1, with the top of the mesh 2 positioned above the top of the support frame 1 and the top of the fairing 3. The mesh 2 fits tightly around the periphery of the support frame 1, with a gap between the mesh 2 and the inner edge of the fairing plate 6 to facilitate insertion and removal of the mesh 2 from the fairing 3. When harvesting the algae, the mesh 2 and the support frame 1 can be removed from the fairing 3 for collection and cleaning.

[0021] The fairing 3 of this embodiment is a transparent cylindrical shape and can be made of plastic; the water inlet 4 is close to the bottom of the fairing 3, and the water outlet 5 is close to the top of the fairing 3. The water inlet 4 and the water outlet 5 are tangent to the outer side surface of the fairing 3 along the direction of water flow, and the upper and lower ends of the rectifier plate 6 extend to the water outlet 5 and the water inlet 4 respectively.

[0022] The working principle of the present invention is: The algae to be cultivated are placed on the top of the sieve mesh 2, and the aquaculture water flowing in from the water inlet 4 rotates upward along the rectifier plate 6 from bottom to top, and then flows out from the water outlet 5. During the flow of the aquaculture water, a part of it will pass through the sieve mesh 2 and enter the inside of the sieve mesh 2 to cultivate the algae and form a culture solution; the sieve mesh 2 does not directly hinder the water flow, and the water flux is large. As the aquaculture water continues to flow rapidly, the aquaculture water flowing in from the outside and the culture solution of the algae cultured in the sieve mesh 2 are osmotic exchanged, thereby purifying the aquaculture water.

[0023] The present invention is suitable for cultivating large-sized algae such as spirulina or large algae seedlings, etc., and can be used to purify aquaculture water, effectively meeting industrial needs.

Claims

1. A seepage-type high-flux algae cultivation device for water purification, characterized by: The invention comprises a support frame (1), a sieve mesh (2) and a fairing (3), wherein the support frame (1) is a hollow cylindrical structure, the sieve mesh (2) is a cylindrical flexible mesh with a closed bottom and an open top, the fairing (3) is a cylindrical structure with a closed bottom and an open top, a water inlet (4) and a water outlet (5) are respectively provided on the fairing (3), and there is a height difference between the water outlet (5) and the water inlet (4), and a spiral rectifier plate (6) is provided inside the fairing (3) between the water inlet (4) and the water outlet (5) along the height direction; the sieve mesh (2) is located at the spiral The support frame (1) is located inside the sieve mesh (2) inside the rotary rectifier plate (6); the algae to be cultivated are placed from the top of the sieve mesh (2); the aquaculture water flowing in from the water inlet (4) rotates and flows upward along the rectifier plate (6) from bottom to top, and then flows out from the water outlet (5); during the flow of the aquaculture water, the aquaculture water enters the sieve mesh (2) inside the sieve mesh (2), cultivates the algae, and forms a culture solution; as the aquaculture water continues to flow, the aquaculture water flowing in from the outside and the culture solution of the algae cultivated in the sieve mesh (2) undergo osmotic exchange, thereby purifying the aquaculture water.

2. The seepage-type high-flux algae cultivation device for water purification according to claim 1, characterized in that: The support frame (1) is in the shape of a transparent cylinder; the bottom of the support frame (1) is closed or has an open structure; and the top of the support frame (1) has an open structure.

3. The seepage-type high-flux algae cultivation device for water purification according to claim 1, characterized in that: The support frame (1) is provided with a plurality of groups of hollow holes (7) along the height direction, and each group of hollow holes (7) is a plurality of hollow holes provided along the circumferential direction, and the number of hollow holes (7) in each group is the same, thereby forming a plurality of rows of hollow holes (7) provided along the circumferential direction.

4. The seepage-type high-flux algae cultivation device for water purification according to claim 1, characterized in that: A gap is left between the outer side surface of the support frame (1) and the inner edge of the rectifying plate (6), and the sieve mesh (2) is located in the gap.

5. The seepage-type high-flux algae cultivation device for water purification according to claim 1, characterized in that: The mesh number of the sieve mesh (2) is 20 to 400, and the interior is used for cultivating algae. The sieve mesh (2) is tightly sheathed on the periphery of the support frame (1), and a gap is left between the sieve mesh (2) and the inner edge of the rectifier plate (6) to facilitate the insertion or removal of the sieve mesh (2).

6. The seepage-type high-flux algae cultivation device for water purification according to claim 1, characterized in that: The sieve mesh (2) and the support frame (1) are taken out from the fairing (3) together when the algae are harvested, and are collected and cleaned.

7. The seepage-type high-flux algae cultivation device for water purification according to claim 1, characterized in that: The water inlet (4) is close to the bottom of the fairing (3), and the water outlet (5) is close to the top of the fairing (3). The water inlet (4) and the water outlet (5) are tangent to the outer side surface of the fairing (3) along the direction of water flow.

8. The seepage-type high-flux algae cultivation device for water purification according to claim 1, characterized in that: The upper and lower ends of the rectifier plate (6) extend to the water outlet (5) and the water inlet (4) respectively.

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