CN216512996U - Chlorella quick collecting device with ceramic membrane filtration - Google Patents

Abstract

The utility model discloses a chlorella rapid acquisition device filtered by a ceramic membrane, which comprises a collection barrel (4), wherein support frames (17) are arranged in the collection barrel at intervals, a support plate (1) is fixedly arranged on the collection barrel, a central rotating shaft (10) penetrating through the support frames is arranged on the support plate, flat ceramic membranes (5) are horizontally arranged on the support frames at intervals, one end of each flat ceramic membrane is hermetically connected with a water collecting plug (6), support shafts (3) in a cantilever shape are fixedly arranged on the central rotating shaft at intervals, and brush rollers (2) capable of being in rotary contact with the surfaces of the flat ceramic membranes are movably arranged on the support shafts. The utility model has compact structure and convenient use, operation and maintenance, can not only greatly reduce the turbidity and the pollutant content of the filtered culture wastewater, but also completely separate the chlorella from the cultured culture wastewater, and can also completely enrich the chlorella on a flat ceramic membrane.

Description

Chlorella quick collecting device with ceramic membrane filtration

Technical Field

The utility model relates to a separation and collection device capable of efficiently separating chlorella from culture wastewater for culturing chlorella, in particular to a collection device for separating chlorella by using a ceramic membrane as a core for filtration.

Background

Nowadays, natural products having health-care functions have a great market demand as green health foods. Chlorella (Chlorella)Chlorella) The chlorella is a common unicellular green alga of chlorella, is a spherical unicellular freshwater alga, has the diameter of 3-8 microns, is one of the earliest lives on the earth, is a high-efficiency photosynthetic plant, grows and breeds by photoautotrophy, and has extremely wide distribution. The chlorella mainly contains abundant proteins (with the content of 55-65%) and polysaccharides (with the content of 25-35%), and also contains essential amino acids, fatty acids, various vitamins, mineral elements and the like, so that the chlorella has comprehensive and balanced nutritional value and health-care function. Meanwhile, a large number of researches find that the chlorella has medical auxiliary effects of resisting tumors, pathogenic microorganisms, dyslipidemia, atherosclerosis and the like. Chlorella is highly nutritious, and particularly rich in protein, and is thus regarded by much attention in many countries around the world, and regulations for the application of Chlorella pyrenoidosa are currently being established in many countries including China, Japan, the United states, and the like. At present, the global chlorella pyrenoidosa market develops rapidly, and various products such as Japanese ISDG chlorella lactobacillus tablets, FACCL chlorella pyrenoidosa nutritional tablets, Germany ViHADO spirulina chlorella capsules and the like appear. In 2020, the global chlorella pyrenoidosa market size is around $ 2.03 billion, and it is expected that in five years in the future, the global chlorella pyrenoidosa market size will remain increasing at a 6.8% annual composite growth rate. Compared with the foreign market, although the domestic chlorella needs vigorously, most domestic enterprises have smaller scale, and the related technology is further improved while the capacity is enlarged.

At present, the technology is mature in the culture and screening process of chlorella, and the industrial scale application can be realized no matter the system is an open system or a closed system. However, the high cost of separation of chlorella algae from the culture solution is one of the key limiting factors. The harvesting of chlorella which is widely adopted at present mainly comprises precipitation, flocculation, filtration, centrifugation and air flotation. The pressure filtration method has the advantages of simple equipment, flexible production mode and wide application range, so the pressure filtration method is widely applied to industrial production. However, the traditional organic membrane for filtration has the defects of low membrane flux, short service life, low strength, easy abrasion, easy blockage of membrane pores, no corrosion resistance and the like, and is difficult to continuously filter for a long time. Therefore, the problem of poor separation and collection effect of chlorella exists in the culture solution process.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems of the traditional organic membrane filtration and traditional separation technology, the utility model provides a ceramic membrane separation system with a stirring device and a cleaning brush, which has the core that the diameter of a membrane is far smaller than that of chlorella, so that the effect of completely intercepting the chlorella is achieved, and a guaranteed rapid chlorella collecting device is provided for subsequent high-efficiency collection.

The technical scheme adopted by the technical problem to be solved by the utility model is as follows: the utility model provides a with filterable chlorella quick collection system of ceramic membrane, it includes the collecting vessel, the interval is provided with a plurality of layers of support frame in the collecting vessel, the fixed backup pad that is provided with above the collecting vessel, is provided with the central pivot of passing the support frame in the backup pad, the level form interval is provided with dull and stereotyped ceramic membrane on the support frame, dull and stereotyped ceramic membrane one end links to each other with the end cap is sealed to catchment, fixed interval is provided with the back shaft that is cantilever form in the pivot of center, the activity is provided with the brush roller that can contact with dull and stereotyped ceramic membrane surface rotation on the back shaft.

The utility model relates to a chlorella collecting device taking a flat ceramic membrane as core equipment, which is characterized in that: the ceramic membrane has the advantages of large filtering area, easy cleaning, stable chemical property, strong corrosion resistance, strong pressure resistance, long service life of 15 years and the like. The device adopts a modular design, the membrane assembly is convenient to mount and dismount, and the number of membranes can be increased as required by adopting a layered design. The whole filtering process is connected with the water outlet main pipe of the ceramic membrane through an external pump, the culture wastewater is continuously discharged through negative pressure suction, and meanwhile, the chlorella is enriched on the flat ceramic membrane. A brush capable of adjusting the rotating speed is arranged on the flat ceramic membrane, and the chlorella enriched on the flat ceramic membrane is continuously collected on the brush. The whole device can continuously and fully automatically operate, not only can efficiently and economically collect chlorella, but also can reduce the turbidity of the filtered culture wastewater to be below 0.1NTU and the COD to be below 50 mg/L, and can reach the first-class A standard that the pollutant discharge standard of a municipal sewage treatment plant is not less than GB18918-2002 after subsequent decoloration and disinfection.

The utility model not only can greatly reduce the turbidity and the pollutant content of the filtered culture wastewater, but also can completely separate the chlorella from the cultured culture wastewater, so that the chlorella is completely enriched on the flat ceramic membrane.

Drawings

Figure 1 is a main sectional structural schematic view of the present invention,

figure 2 is a schematic cross-sectional view a-a of figure 1,

figure 3 is an enlarged schematic view of the X-X partial structure of figure 1,

fig. 4 is a schematic view of the structure of fig. 1 in the direction B.

In the figure, the brush roller device comprises a support plate 1, a support plate 2, a brush roller 3, a support shaft 4, a collecting barrel 5, a flat ceramic membrane 6, a water collecting plug 7, a liquid discharge pipe 8, a lower bearing cover 9, a roller bearing 10, a central rotating shaft 11, a motor 12, an upper bearing cover 13, a motor fixing frame 14, a middle beam hole 15, a water collecting cavity 16, a water discharge pipe 17, a support frame 18, a supporting plate 19, a connecting rod 20, a middle ring body 21 and an inner ring body.

Detailed Description

The present invention will be described in further detail with reference to examples.

In the figure, a chlorella rapid acquisition device filtered by a ceramic membrane comprises a cylindrical collecting barrel 4 made of stainless steel, six layers of supporting frames 17 are arranged in the collecting barrel at intervals (five layers, four layers or other multi-layer supporting frames can be arranged according to the size of the collecting barrel), a rectangular supporting plate 1 is fixedly arranged on the collecting barrel, a motor fixing frame 13 is arranged on the supporting plate, a motor 11 is arranged on the motor fixing frame, a central rotating shaft 10 penetrating through the supporting frames is arranged on the supporting plate, the upper end of the central rotating shaft is arranged on the middle position of the supporting plate through a roller bearing 9 and an upper bearing cover 12 (the thickness of the middle position of the supporting plate is larger than the thickness of the periphery), the upper end of the central rotating shaft is connected with the output end of the motor 11, the lower end of the central rotating shaft is arranged on the middle of a bottom plate of the collecting barrel through the roller bearing 9 and a lower bearing cover 8 (the thickness of the middle of the bottom plate is larger than the thickness of the periphery), a liquid discharge pipe 7 is arranged at the lower end of the collecting barrel, the support frame comprises an outer ring body (not shown in the figure) fixed on the wall of the collecting barrel, an inner ring body 21 penetrating through the central rotating shaft and a middle ring body 20 positioned between the inner ring body and the outer ring body, connecting rods 19 are arranged between the outer ring body and the middle ring body at intervals, a support plate 18 is arranged between the outer ring body and the inner ring body at intervals, a flat ceramic membrane 5 is fixedly arranged on the support plate of the support frame at intervals in a horizontal shape, one end of the flat ceramic membrane is connected with a water collecting plug 6 in a sealing manner, a middle beam hole 14 is arranged in the middle of the flat ceramic membrane and is communicated with a water collecting cavity 15 in the water collecting plug, water filtered by the flat ceramic membrane enters the middle beam hole and then enters the water collecting cavity in the water collecting plug, one end of the water collecting plug is connected with the water collecting cavity, the other end of the water collecting plug is connected with a peristaltic pump (not shown in the figure) outside the collecting barrel, and support shafts 3 in a cantilever shape are arranged on the central rotating shaft at fixed intervals (namely, one end of the central rotating shaft is connected with the central rotating shaft and is connected with the central rotating shaft The rotating shaft is fixedly connected, and the other end of the rotating shaft is in a cantilever shape), and a brush roller 2 which can be in rotary contact with the surface of the flat ceramic membrane is movably arranged on the supporting shaft. The supporting shaft rotates around the central rotating shaft, and meanwhile, the brush roller on the supporting shaft can rotate around the supporting shaft.

The stainless steel collecting barrel is cylindrical, the diameter of the circle of the bottom surface is 1.0 m, and the height is 1.5 m. Six layers of support frames for fixing the flat ceramic membranes are placed, 6-10 flat ceramic membranes are placed on each layer, the size of each flat ceramic membrane is 40 cm long, 10.9 cm wide and 6 mm thick (purchased), the flat ceramic membranes mainly comprise alpha-aluminum oxide with the average particle size of 20um (mass fraction is 97%), after a coating with the average pore size of about 20um is prepared on a support body by using 1.5um alpha-aluminum oxide, the average pore size is 0.5um, the applicable pH value of the flat ceramic membranes is 3-10, a water collecting plug and a liquid discharge pipe (water outlet) used by each flat ceramic membrane are made of heat-resistant polyvinyl chloride, a peristaltic pump (Ruizzi fluid, YZ 1515X) with the volume of 10.1-735.1 ml/min is externally connected after the water discharge pipes 16 of the three flat ceramic membranes on each layer are connected, and the flow rate of the pump is controlled by a valve. Three circles are arranged on each layer of flat ceramic membraneCylindrical brush rollers with the size of phi 6 x 25 cm, wherein one ends of the three cylindrical brush rollers are connected with a central rotating shaft in a welding way through upper supporting shafts, culture wastewater for culturing chlorella is placed in a stainless steel collecting barrel, the rotating speed of the central rotating shaft is adjusted to be 60 r/min, peristaltic pumps are started, each pump produces 5L of water per hour, and the membrane flux is about 25L/m²∙ h, running for 18 hours every day, producing 270L of water, continuously filtering for 3 hours in the running process due to high viscosity of the aquaculture wastewater, enabling transmembrane pressure difference to reach 70KPa, and aerating and flushing the surface of the flat ceramic membrane for 5 minutes by using an air compressor in an air washing mode, wherein the membrane flux can be basically recovered. The diameter of the chlorella is 3-8 um, the aperture of the membrane is 0.5um and is far smaller than the diameter of the chlorella, so when the culture wastewater is filtered by the flat ceramic membrane, the chlorella in the wastewater is completely retained on the surface of the flat ceramic membrane, then the chlorella is conveniently and quickly collected by continuously rolling the brush roller on the surface of the ceramic membrane, meanwhile, the turbidity of produced water after membrane filtration is 0.05NTU, the COD is 40 mg/L, the turbidity and the COD standard are better than or equal to the first-class A standard of GB18918-2002 pollutant discharge standard of urban sewage treatment plants, and when the chlorella is collected, the whole device also has an obvious filtration effect on pollutants in the culture wastewater.

Although the present invention has been described in detail with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims (3)

1. The utility model provides a with filterable chlorella quick collection system of ceramic membrane, it includes collecting vessel (4), characterized by: the improved ceramic brush roll collecting device is characterized in that a plurality of layers of supporting frames (17) are arranged in the collecting barrel at intervals, a supporting plate (1) is fixedly arranged on the collecting barrel, a central rotating shaft (10) penetrating through the supporting frames is arranged on the supporting plate, flat ceramic membranes (5) are arranged on the supporting frames at intervals in a horizontal mode, one ends of the flat ceramic membranes are connected with a water collecting plug (6) in a sealing mode, supporting shafts (3) which are cantilever-shaped are arranged on the central rotating shaft at intervals, and brush rolls (2) which can be in rotary contact with the surfaces of the flat ceramic membranes are movably arranged on the supporting shafts.

2. The device for rapidly collecting chlorella by ceramic membrane filtration as claimed in claim 1, wherein: the upper end of the central rotating shaft is arranged on the supporting plate through a roller bearing (9) and an upper bearing cover (12), and the lower end of the central rotating shaft is arranged on the bottom plate of the collecting barrel through the roller bearing (9) and a lower bearing cover (8).

3. The device for rapidly collecting chlorella by ceramic membrane filtration as claimed in claim 1, wherein: the support frame comprises an outer ring body fixed on the wall of the collecting barrel, an inner ring body (21) penetrating through the central rotating shaft and a middle ring body (20) positioned between the inner ring body and the outer ring body, connecting rods (19) are arranged between the outer ring body and the middle ring body at intervals, and supporting plates (18) are arranged between the outer ring body and the inner ring body at intervals.

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