Microalgae flocculating settling harvesting device

Abstract

The utility model discloses a microalgae flocculating settling harvesting device, and relates to the field of microalgae harvesting. A microalgae flocculating settling harvesting device comprises a settling pond and further comprises a conveying pipe fixedly inserted into a liquid inlet of the settling pond; the flocculating agent storage tank is placed on one side, close to the conveying pipe, of the sedimentation tank; the connecting pipe is fixedly inserted into the conveying pipe; according to the utility model, the flocculating agent is introduced by utilizing the negative pressure suction force generated by flowing of the microalgae solution in the conveying pipe, and the flocculating agent and the microalgae solution are mixed by virtue of the power of water flow, so that compared with the traditional mode of directly adding the flocculating agent into the sedimentation tank, the flocculating agent can be more quickly and uniformly dispersed in the microalgae solution, the mixing efficiency is obviously improved, and the energy consumption is reduced. The full proceeding of the flocculation reaction is promoted, the formation of a larger and denser flocculating constituent is facilitated, and the sedimentation effect of microalgae is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the microalgae harvesting technical field, concretely relates to a microalgae flocculation and sedimentation harvesting device. BACKGROUND

[0002] As a kind of biological resources with great potential, microalgae shows broad application prospect in many fields, in food industry, part of microalgae is rich in protein, vitamin and other nutrients, can be used as high-quality food additive or functional food raw material;In feed field, it can be used as high-quality protein source of animal feed;In bioenergy field, microalgae can accumulate oil through photosynthesis, and can be used as important raw material of renewable energy such as biodiesel;In pharmaceutical industry, some microalgae contain bioactive substances with antioxidant, antitumor and other effects, which can be used for drug research and development.

[0003] However, microalgae is small in size, usually dispersed in suspension state in culture solution, density is close to culture solution, which leads to very slow sedimentation speed under natural conditions, which makes the harvesting of microalgae face great challenge, at present, common methods of microalgae harvesting include filtration, centrifugation and flocculation and sedimentation, although filtration method is simple, but for small microalgae, it is easy to cause filter membrane blockage, and the processing efficiency is low;Centrifugation method can realize efficient microalgae separation, but the equipment cost is high, and the energy consumption is large, and large-scale application is limited.

[0004] Flocculation and sedimentation method becomes one of important methods of microalgae harvesting due to the advantages of relatively simple operation and low cost, and the traditional flocculation and sedimentation method often adds flocculating agent directly in sedimentation tank, since flocculating agent is difficult to diffuse rapidly and uniformly in sedimentation tank, local concentration is easy to be too high or too low, which may lead to poor flocculation effect, and microalgae is difficult to form large flocculation body quickly and fully, affect the sedimentation efficiency, in addition, in order to promote the mixing of flocculating agent and microalgae solution, complex stirring equipment is often needed in sedimentation tank, which not only increases the equipment cost and installation and maintenance difficulty, but also may cause damage to microalgae cells due to improper stirring intensity control, reduce microalgae quality, in view of this, the utility model is provided. UTILITY MODEL CONTENT

[0005] The technical problem to be solved by the utility model is to overcome the shortcomings of prior art, and provide a microalgae flocculation and sedimentation harvesting device which can overcome the above problems or at least partially solve the above problems.

[0006] The utility model discloses a basic thought of technical scheme is: a kind of microalgae flocculation settlement harvesting device, including sedimentation tank, further include: conveying pipe, fixed plug-in at the liquid inlet of the sedimentation tank;Flocculating agent storage tank, place in the side of the sedimentation tank close to conveying pipe;Connecting pipe, fixed plug-in in the conveying pipe;The feed inlet of the connecting pipe is communicated with the discharge port of flocculating agent storage tank.

[0007] In order to facilitate guaranteeing the adsorption effect of flocculating agent, further, the direction of microalgae solution flowing in the conveying pipe is perpendicular to the pipe opening of the connecting pipe located in the conveying pipe.

[0008] In order to facilitate controlling the addition amount of flocculating agent according to the concentration of microalgae solution, further, it further includes inflatable airbag ring, the inflatable airbag ring is fixedly connected at the position close to the connecting pipe inside the conveying pipe, the connecting pipe is penetrated in the inflatable airbag ring at the part of the conveying pipe, the conveying pipe is fixedly connected with the air inlet pipe and the exhaust pipe communicated with the inflatable airbag ring, the air inlet pipe and the exhaust pipe are both equipped with solenoid valve.

[0009] In order to facilitate improving the service life of inflatable airbag ring, further, the inflatable airbag ring is corrosion-resistant airbag ring.

[0010] In order to facilitate further improving the uniformity of microalgae solution and flocculating agent mixing, further, the fixed rod is fixedly connected at the position close to the liquid outlet of conveying pipe in the sedimentation tank, the fixed rod is fixedly connected with baffle, the baffle is suspended in the sedimentation tank, and the baffle is vertically distributed with the conveying pipe.

[0011] In order to facilitate closing the pipe opening of conveying pipe in time after completing the conveying of microalgae solution, avoiding the backflow of microalgae solution through the conveying pipe, further, the solenoid valve is fixedly connected at the position close to the liquid outlet in the conveying pipe.

[0012] In order to facilitate moving the remaining flocculating agent upward with the continuous reduction of flocculating agent in the flocculating agent storage tank, so that the connecting pipe can stably convey the flocculating agent into the conveying pipe and mix with the microalgae solution, further, the T-shaped rod is symmetrically and slidably connected to the flocculating agent storage tank, the lifting plate is slidably connected in the flocculating agent storage tank, one end of the T-shaped rod inside the flocculating agent storage tank is fixedly connected with the lifting plate, the tension spring is sleeved on the part of the T-shaped rod outside the flocculating agent storage tank, and the two ends of the tension spring are fixedly connected with the flocculating agent storage tank and the T-shaped rod respectively.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model discloses a microalgae solution in the conveying pipe flow produces the negative pressure suction force and introduces the flocculating agent, and the power of water flow promotes the mixture, compared with the traditional way of directly adding flocculating agent in the sedimentation tank, can make the flocculating agent more quickly, evenly dispersed in the microalgae solution, significantly improve the mixing efficiency, promote the full conduct of flocculation reaction, help to form larger, more dense flocculation body, improve the sedimentation effect of microalgae, and no additional power equipment is needed to transport the flocculating agent, only relying on the negative pressure suction force produced by the microalgae solution flow can realize the automatic addition of the flocculating agent, simplify the operation process, reduce the equipment cost and energy consumption.

[0014] The device does not need to set up complex stirring and mixing equipment inside the sedimentation tank, and can realize the injection and mixing of the flocculating agent through simple components such as the conveying pipe and the connecting pipe, thereby reducing the complexity and fault points of the equipment, reducing the installation and maintenance cost and difficulty of the equipment, saving the internal space of the sedimentation tank, and being beneficial to the design and layout optimization of the sedimentation tank.

[0015] The specific embodiments of the utility model will be described in further detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0016] In the drawings:

[0017] Figure 1 The structure diagram of the utility model Figure 1 ;

[0018] Figure 2 The structure diagram of the utility model Figure 2 ;

[0019] Figure 3 The structure diagram of the utility model Figure 3 ;

[0020] Figure 4 The structure diagram of the utility model conveying pipe, flocculating agent storage tank and internal structure

[0021] Figure 5 The structure diagram of the utility model conveying pipe, flocculating agent storage tank and internal structure

[0022] In the drawings: 1, the sedimentation tank;101, the fixed rod;102, the baffle;2, the conveying pipe;201, the electromagnetic valve door;202, the inflatable air bag ring;203, the air inlet pipe;204, the exhaust pipe;3, the flocculating agent storage tank;301, the connecting pipe;302, the lifting plate;303, the T-shaped rod;304, the tension spring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model, but are not used to limit the scope of the utility model.

[0024] Embodiment 1

[0025] With reference to Figures 1-5 A microalgae flocculation and sedimentation harvesting device, comprising a sedimentation tank 1, further comprising: a conveying pipe 2 fixedly plugged at the liquid inlet of the sedimentation tank 1; a flocculant storage tank 3 placed at one side of the sedimentation tank 1 close to the conveying pipe 2; a connecting pipe 301 fixedly plugged in the conveying pipe 2; and the feed inlet of the connecting pipe 301 communicates with the discharge outlet of the flocculant storage tank 3.

[0026] The microalgae solution is stored in an external culture container (not shown in the figure), when the microalgae is mature and needs to be harvested, at this time, the liquid outlet of the external culture solution is connected with the conveying pipe 2 through a conveying pump, then the conveying pump is started to convey the microalgae solution into the conveying pipe 2, and the microalgae solution is conveyed into the sedimentation tank 1 through the conveying pipe 2.

[0027] According to Bernoulli's principle and related knowledge of fluid mechanics, when the microalgae solution flows in the conveying pipe 2, it will generate a negative pressure suction force on the connecting pipe 301, the flocculant is stored in the flocculant storage tank 3, one end of the connecting pipe 301 is fixedly plugged in the conveying pipe 2, and the other end communicates with the discharge outlet of the flocculant storage tank 3, under the action of negative pressure adsorption, the flocculant in the flocculant storage tank 3 is sucked into the connecting pipe 301 and enters the conveying pipe 2, and contacts with the microalgae solution therein, with the flow of the microalgae solution, under the pushing and stirring action of the water flow in the conveying pipe 2, the flocculant gradually diffuses in the microalgae solution, realizes full mixing, and the mixed solution continues to flow along the conveying pipe 2 and finally flows into the sedimentation tank 1, in the sedimentation tank 1, the flocculant promotes the flocculation reaction of the microalgae to form larger flocculation bodies, these flocculation bodies gradually settle to the bottom of the sedimentation tank 1 under the action of gravity, and the relatively clear supernatant is left in the upper part of the sedimentation tank 1 and can be discharged through the liquid discharge device (not shown in the figure) of the sedimentation tank 1, so as to realize the flocculation and sedimentation harvesting of the microalgae.

[0028] The negative pressure suction force generated by the flow of the microalgae solution in the conveying pipe 2 is used to introduce the flocculant, and the water flow is used to promote the mixing of the two, compared with the traditional way of directly adding the flocculant in the sedimentation tank 1, the flocculant can be more quickly and uniformly dispersed in the microalgae solution, the mixing efficiency is significantly improved, the flocculation reaction is promoted to fully proceed, which is helpful to form larger and denser flocculation bodies and improve the sedimentation effect of the microalgae.

[0029] Furthermore, no additional power equipment is needed to transport the flocculant; the flocculant can be automatically added simply by relying on the negative pressure suction generated by the flow of the microalgae solution, which simplifies the operation process and reduces equipment costs and energy consumption.

[0030] This device eliminates the need for complex mixing equipment inside the sedimentation tank 1. The flocculant can be injected and mixed using only simple components such as the delivery pipe 2 and the connecting pipe 301. This reduces the complexity and potential for failure of the equipment, lowers the installation and maintenance costs and difficulty, and also saves internal space in the sedimentation tank 1, which is beneficial for the design and layout optimization of the sedimentation tank 1.

[0031] Example 2:

[0032] Reference Figures 1-5 A microalgae flocculation sedimentation harvesting device is basically the same as that in Example 1, but further: the direction of flow of the microalgae solution in the conveying pipe 2 is perpendicular to the opening of the connecting pipe 301 in the conveying pipe 2.

[0033] like Figure 5 As shown, by making the opening of the connecting pipe 301 inside the delivery pipe 2 perpendicular to the direction of the flow of the microalgae solution, the flow velocity direction of the microalgae liquid changes most drastically at the opening of the connecting pipe 301. According to Bernoulli's principle, the drastic change in flow velocity will lead to a significant decrease in pressure, thereby generating a large negative pressure suction force, which in turn ensures the adsorption effect of the flocculant.

[0034] Example 3:

[0035] Reference Figures 1-5 A microalgae flocculation sedimentation harvesting device, basically the same as in Example 2, further includes an inflatable airbag ring 202. The inflatable airbag ring 202 is fixedly connected inside the conveying pipe 2 near the connecting pipe 301. The connecting pipe 301 passes through the inflatable airbag ring 202 at the part of the conveying pipe 2. An air inlet pipe 203 and an air outlet pipe 204, which are connected to the inflatable airbag ring 202, are fixedly connected to the conveying pipe 2. Solenoid valves are installed in both the air inlet pipe 203 and the air outlet pipe 204. When the concentration of the microalgae solution to be harvested is relatively high... When the pressure is high, in order to increase the amount of flocculant added, gas can be supplied to the expansion airbag ring 202 through the air inlet pipe 203. Then the expansion airbag ring 202 will expand, and the inner diameter of the expansion airbag ring 202 will decrease. This will reduce the diameter of the inside of the delivery pipe 2 at the connecting pipe 301. The smaller the inner diameter of the delivery pipe 2, the greater the flow velocity of the liquid in the delivery pipe 2 will be, and the greater the negative pressure suction force generated on the connecting pipe 301 will be. This will allow more flocculant to be adsorbed, thus increasing the amount of flocculant added.

[0036] The inflatable air bag ring 202 is a corrosion-resistant air bag ring. The inflatable air bag ring 202 can be made of a corrosion-resistant material such as neoprene. In this way, the service life of the inflatable air bag ring 202 can be prolonged.

[0037] Embodiment 4:

[0038] With reference to Figures 1-5 The microalgae flocculation and sedimentation harvesting device is basically the same as that in Embodiment 3, and further comprises: a fixed rod 101 fixedly connected to the sedimentation tank 1 at a position close to the liquid outlet of the conveying pipe 2; and a baffle 102 fixedly connected to the fixed rod 101 and suspended in the sedimentation tank 1. The baffle 102 is vertically distributed with the conveying pipe 2. When the microalgae solution mixed with the flocculant enters the sedimentation tank 1, the baffle 102 is impacted, and then the microalgae solution spreads into the sedimentation tank 1, further improving the uniformity of the mixture of the microalgae solution and the flocculant.

[0039] The conveying pipe 2 is fixedly connected with an electromagnetic valve 201 at a position close to the liquid outlet. When the conveying of the microalgae solution is completed, the electromagnetic valve 201 can be used to close the pipe opening of the conveying pipe 2 in time, avoiding backflow of the microalgae solution through the conveying pipe 2.

[0040] Embodiment 5:

[0041] With reference to Figures 1-5 The microalgae flocculation and sedimentation harvesting device is basically the same as that in Embodiment 4, and further comprises: a T-shaped rod 303 symmetrically and slidably connected to the flocculant storage tank 3; a lifting plate 302 slidably connected to the flocculant storage tank 3; and a tension spring 304 sleeved on the T-shaped rod 303 at a position outside the flocculant storage tank 3, with the T-shaped rod 303 fixedly connected to the lifting plate 302 at one end inside the flocculant storage tank 3, and the two ends of the tension spring 304 fixedly connected to the flocculant storage tank 3 and the T-shaped rod 303, respectively.

[0042] The lifting plate 302, the T-shaped rod 303, and the tension spring 304 can be used in combination to lift the flocculant in the flocculant storage tank 3. As the amount of the flocculant in the flocculant storage tank 3 decreases, the lifting plate 302 can continuously move the remaining flocculant upward, so that the connecting pipe 301 can stably convey the flocculant into the conveying pipe 2 to mix with the microalgae solution, effectively ensuring the stability of the addition of the flocculant. In addition, the staff can know the remaining amount of the flocculant in the flocculant storage tank 3 according to the height of the T-shaped rod 303, so as to supplement the flocculant in the flocculant storage tank 3 in time.

[0043] The above merely describes preferred embodiments of the present application and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application.

Claims

1. A microalgae flocculation and sedimentation harvesting device, characterized in that, Including a sedimentation tank (1), also including: A conveying pipe (2) is fixedly inserted at the liquid inlet of the sedimentation tank (1); A flocculant storage tank (3) is placed at one side of the sedimentation tank (1) close to the conveying pipe (2); A connecting pipe (301) is fixedly inserted in the conveying pipe (2); The feed inlet of the connecting pipe (301) is communicated with the discharge outlet of the flocculant storage tank (3).

2. A device for harvesting of flocculated microalgae according to claim 1, wherein, The direction of the microalgae solution flowing in the conveying pipe (2) is perpendicular to the pipe opening of the connecting pipe (301) in the conveying pipe (2).

3. A device for harvesting of flocculated microalgae according to claim 1, wherein, Further comprising an inflatable air bag ring (202) fixedly connected inside the conveying pipe (2) close to the connecting pipe (301), the connecting pipe (301) is located in the part of the conveying pipe (2) and penetrates the inflatable air bag ring (202), the conveying pipe (2) is fixedly connected with the air inlet pipe (203) and the exhaust pipe (204) communicated with the inflatable air bag ring (202), and the air inlet pipe (203) and the exhaust pipe (204) are both provided with electromagnetic valves.

4. A device for harvesting of flocculated microalgae according to claim 3, wherein, The inflatable air bag ring (202) is a corrosion-resistant air bag ring.

5. The device of claim 1, wherein, A fixed rod (101) is fixedly connected to the position close to the liquid outlet of the conveying pipe (2) in the sedimentation tank (1), a baffle (102) is fixedly connected to the fixed rod (101), the baffle (102) is suspended in the sedimentation tank (1), and the baffle (102) is vertically distributed with the conveying pipe (2).

6. The device of claim 1, wherein, An electromagnetic valve (201) is fixedly connected to the position close to the liquid outlet in the conveying pipe (2).

7. A device for harvesting of flocculated microalgae according to claim 1, wherein, A T-shaped rod (303) is symmetrically and slidably connected to the flocculant storage tank (3), a lifting plate (302) is slidably connected in the flocculant storage tank (3), one end of the T-shaped rod (303) located inside the flocculant storage tank (3) is fixedly connected with the lifting plate (302), a tension spring (304) is sleeved on the part of the T-shaped rod (303) located outside the flocculant storage tank (3), and both ends of the tension spring (304) are fixedly connected with the flocculant storage tank (3) and the T-shaped rod (303).

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