CN110841482A - Novel high-flux filtering device and using method - Google Patents
Novel high-flux filtering device and using method Download PDFInfo
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- CN110841482A CN110841482A CN201911301196.7A CN201911301196A CN110841482A CN 110841482 A CN110841482 A CN 110841482A CN 201911301196 A CN201911301196 A CN 201911301196A CN 110841482 A CN110841482 A CN 110841482A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/06—Tubular membrane modules
- B01D63/062—Tubular membrane modules with membranes on a surface of a support tube
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
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Abstract
The invention discloses a novel high-flux filtering device and a using method thereof, the novel high-flux filtering device comprises a membrane element, the membrane element comprises a cylindrical supporting body, a cylindrical inner cavity channel is axially arranged at the center of the supporting body, a supporting layer is formed between the inner cavity channel and the outer layer of the supporting body, an inner membrane layer is arranged on the inner wall of the supporting layer, an outer membrane layer is arranged on the outer wall of the supporting layer, and two or more than two raw material liquid filtering channels which are axially arranged and distributed in an asymmetric structure are arranged in the supporting layer; by increasing the inner cavity channel of the membrane element, the permeation area of the membrane element is increased, the ratio of the circulation flow to the permeation amount of the permeable membrane is reduced, and the permeation performance of the ceramic membrane element is obviously improved. Meanwhile, according to the condition of water quality to be purified, the optimal permeability is achieved and the permeability is improved by the reasonable allocation of the sizes of the filtering channels of the raw material liquid through the allocation of the filtering precision of the inner membrane layer and the outer membrane layer.
Description
Technical Field
The invention relates to the technical field of research and development of tubular ceramic membranes, in particular to a novel high-flux filtering device and a using method thereof.
Background
The ceramic membrane is a separation medium with screening efficiency, which is manufactured by sintering ceramic powder. Compared with the earlier industrialized high polymer separation membrane, the inorganic separation membrane has the advantages of narrow pore size distribution, good separation performance, high temperature resistance, stable chemical performance, no corrosion of organic solvent and bacteria, acid-base cleaning, high mechanical strength, no deformation, high-pressure back flushing, hot steam regeneration, back flushing and the like. The ceramic membrane separation element is generally a separation material which is prepared by one or more layers of asymmetric pore-size structures on a macroporous support body and is of a porous structure, and the ceramic membrane separation element is a tubular ceramic membrane element with a regularly-arranged channel structure, which is widely industrialized and marketed.
Further, the tubular ceramic membrane element is composed of a porous supporting layer, a supporting layer and a microporous membrane layer which are asymmetrically distributed; the pipe wall is densely distributed with micropores, raw material liquid flows in the porous channel of the membrane pipe under the drive of pressure, substances (or liquid) containing small molecules penetrate through the supporting layer and the membrane layer outwards along the vertical direction of the raw material liquid, substances (or solid particles) containing large molecules are intercepted by the supporting layer and the membrane layer, and therefore the purposes of separation, concentration, purification, environmental protection and the like of fluid are achieved.
However, with the development of the application field of the membrane separation technology, the ceramic membrane filtration technology has defects in the use process, and has defects in energy conservation and consumption reduction, and needs to be improved. When the existing tubular ceramic membrane element is used, the pump facility operation fluid volume in the ceramic membrane separation process is large, the circulation flow rate in practical application is generally dozens of times or even hundreds of times of the seepage amount of the permeation membrane, and a large amount of energy is consumed in operation. Taking a currently widely commercialized and widely used 19-channel ceramic separation membrane element with a membrane channel diameter of 4mm (the diameter of an excircle is 30mm, and the effective length is about 100 cm) as an example, the membrane module filtering area of a 19-membrane core is about 4.4 m2. In a typical sewage treatment process, the steady flux is about 100 l/m at a membrane surface flow rate of 5m/sec2h, total permeate flow 440L per hour and liquid circulation flow about F ═ 3.142 x (0.2 cm)2x19 x19x500cm/Secx3600Sec =81.7 m3. It can be seen that the circulation flow rate is 185.6 times the amount of bleed through the membrane, which consumes a lot of energy.
As can be seen from the above examples, the cross-flow filtration has a low permeation flux rate, a small effective water production filtration area, a high equipment investment and operation cost, and cannot effectively save energy consumption and improve fluid flux.
Disclosure of Invention
The invention aims to provide a novel high-flux filtering device and a using method thereof, which further improve the permeation quantity of fluid through a membrane.
The technical scheme adopted by the invention is as follows:
the utility model provides a novel high flux filter equipment, includes the film element, the film element include the cylinder form supporter, the center of supporter is equipped with column inner chamber passageway along the axial, constitutes the supporting layer between inner chamber passageway and the supporter skin, the inner wall of supporting layer is equipped with the rete, the outer wall is equipped with the rete outward, be equipped with in the supporting layer along the axial setting two-layer or more than two-layer with asymmetric structure distribution's raw materials liquid filtration passageway.
The membrane component is characterized by further comprising an upper flow guide disc and a lower flow guide disc, wherein the upper flow guide disc comprises a plurality of layers of annular flow guide channels and a central flow guide cylinder, the annular flow guide channels are sequentially sleeved from inside to outside by taking the central flow guide cylinder as a center, the upper end of the central flow guide cylinder is closed, the lower end of the central flow guide cylinder is open, every two adjacent layers of annular flow guide channels are connected through a communicating cylinder, the annular flow guide channel at the innermost layer is connected with the central flow guide cylinder through the communicating cylinder, the lower end of each annular flow guide channel is uniformly distributed and communicated with a plurality of flow guide nozzles, and each flow guide nozzle is in butt joint with the upper end; the lower guide disc and the upper guide disc are the same in structure and are symmetrical.
The cylindrical support body adopts a cylindrical structure.
The columnar inner cavity channel adopts a cylindrical or polygonal or triangular structure, and the cross-sectional area of the inner cavity channel accounts for 1/10-1/2 of the cross-sectional area of the support body.
The supporting layer is made of one or more of carbo-silica, silicon carbide, silicon nitride, alumina, zirconia and titanium oxide, and the filtering precision of the supporting layer is 0.1-50 um.
The supporting layer is made of rubber, plastic or rubber-plastic composite materials, and the filtering precision of the inner membrane layer and the outer membrane layer is 10nm-500 nm.
The inner film layer and the outer film layer are made of one or more of carbon silica, silicon carbide, alumina, zirconia and titanium oxide, and the filtering precision of the inner film layer and the outer film layer is 10nm-500 nm.
The raw material liquid filtering channel adopts a cylindrical or polygonal or triangular structure, and the cross-sectional area of the raw material liquid filtering channel accounts for 1/20-1/3 of the cross-sectional area of the support body.
The use method of the novel high-flux filtering device comprises the following steps:
a: firstly, injecting stock solution into a stock solution filtering channel, filtering the stock solution from the stock solution filtering channel to the inside and the outside of a supporting layer in a penetrating way under the water pressure, and penetrating according to the principle of being nearby in the filtering process;
b: under the water pressure of the stock solution in the stock solution filtering channel close to the inner cavity channel, the stock solution firstly passes through the supporting layer and then passes through the inner membrane layer to permeate into the inner cavity channel to form a filtering solution; under the water pressure of the stock solution in the stock solution filtering channel close to the outer wall of the supporting layer, the stock solution firstly passes through the supporting layer and then passes through the outer membrane layer to permeate to the periphery of the supporting layer to form a filtrate;
c: the filtrate flowing into the inner cavity channel flows into the flow guide nozzles of the upper flow guide disc and the lower flow guide disc under the water pressure, flows into the corresponding annular flow guide channels from the flow guide nozzles, flows into the annular flow guide channels of the adjacent inner layers from the communicating cylinder between the annular flow guide channels, finally is collected into the central flow guide cylinder, and enters the filter barrel from the lower end opening of the central flow guide cylinder;
d: the filtrate flowing into the periphery of the supporting layer directly enters the filter barrel;
e: the filtrate in the filter vat is discharged from the filter vat water outlet.
According to the invention, the raw material liquid filtering channel of the tubular ceramic membrane element is asymmetrically distributed between the inner cavity channel and the outer membrane layer, the pressure difference at two sides of the raw material liquid filtering channel is used as a driving force, the support body and the membrane are used as filtering media, so that the effective permeation area is increased, the permeation quantity of the membrane is increased, the energy is saved, the consumption is reduced, and the operation cost is reduced.
The inner cavity channel of the tubular ceramic membrane element is used for increasing the permeation area of the ceramic membrane channel, so that the raw material liquid can rapidly pass through the supporting layer, the inner membrane layer and the outer membrane layer under the same pressure difference in the filtering channel, the permeation flux of the membrane is improved, the power and the flow of pump facilities are reduced, the energy consumption is saved, and the operation cost is reduced.
The tubular ceramic membrane element can reduce the raw water flow, improve the permeation area of the membrane element, increase the permeation flux of the filtrate, improve the purification effect and save the energy consumption.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a schematic view of the overall structure of the present invention;
fig. 4 is a schematic perspective view of the diaphragm of the present invention.
Detailed Description
As shown in fig. 1, 2 and 3, the membrane element comprises a membrane element 1, an upper diversion disc 2 and a lower diversion disc 3, wherein the membrane element 1 comprises a cylindrical support body 4, and the cylindrical support body 4 adopts a cylindrical structure. The cylinder structure matches the existing mature filtering device, and the matching degree of market models is met. The center of the supporting body 4 is provided with a columnar inner cavity channel 12 along the axial direction, a supporting layer 11 is formed between the inner cavity channel 12 and the outer layer of the supporting body 4, the columnar inner cavity channel 12 can adopt a cylindrical or polygonal or triangular structure, and the cross-sectional area of the inner cavity channel 12 accounts for 1/10-1/2 of the cross-sectional area of the supporting body 4. The inner wall of the supporting layer 11 is provided with an inner film layer 13, the outer wall is provided with an outer film layer 14, and the supporting layer 11 is internally provided with two or more than two raw material liquid filtering channels 15 which are distributed in an asymmetric structure along the axial direction.
As shown in fig. 4, the upper baffle disc 2 includes a plurality of annular baffle channels 21 and a central baffle cylinder 22, the annular baffle channels 21 are sequentially sleeved from inside to outside with the central baffle cylinder 22 as the center (the annular baffle channels represent integers greater than or equal to 1), the upper end of the central baffle cylinder 22 is closed, the lower end of the central baffle cylinder 22 is open, every two adjacent annular baffle channels 21 are connected through a communicating cylinder 23, the annular baffle channel 21 at the innermost layer is connected with the central baffle cylinder 22 through a communicating cylinder 23, the lower end of each annular baffle channel 21 is uniformly distributed and communicated with a plurality of baffle nozzles 24, and each baffle nozzle 24 is in butt joint with the upper end of the inner cavity channel 12 of one membrane element 1; the flow guiding nozzle 24 according to the invention is not plugged into the lumen channel 12 of one membrane element 1, but is connected to prevent the membrane element 1 from being pushed under the water pressure impact pressure, and thus the membrane element 1 is damaged. The lower guide disc 3 and the upper guide disc 2 are identical and symmetrical in structure. A plurality of membrane elements 1 are arranged between the upper diversion plate 2 and the lower diversion plate 3, and the upper end and the lower end of an inner cavity channel 12 of each membrane element 1 respectively correspond to one diversion nozzle 24 of the upper diversion plate 2 and one diversion nozzle 24 of the lower diversion plate 3.
The supporting layer 11 is made of one or more of carbon silica, silicon carbide, silicon nitride, alumina, zirconia and titanium oxide, and the filtering precision of the supporting layer 11 is 0.1-50 um. The supporting layer 11 is made of rubber, plastic or rubber-plastic composite materials, and the filtering precision of the inner membrane layer 13 and the outer membrane layer 14 is 10nm-500 nm. The inner membrane layer 13 and the outer membrane layer 14 are made of one or more of carbon silica, silicon carbide, alumina, zirconia and titanium oxide, and the filtering precision of the inner membrane layer 13 and the outer membrane layer 14 is 10nm-500 nm.
The raw material liquid filtering channel 15 adopts a cylindrical or polygonal or triangular structure, the corresponding structure is matched with the flow guide nozzle 24 with the corresponding structure, and the sectional area of the raw material liquid filtering channel 15 accounts for 1/20-1/3 of the sectional area of the support body 4.
The use method of the novel high-flux filtering device comprises the following steps:
a: firstly, injecting stock solution into a stock solution filtering channel 15, filtering the stock solution from the stock solution filtering channel 15 to the inside and the outside of the supporting layer 11 under water pressure, and permeating according to the principle of the neighborhood in the filtering process;
b: under the water pressure of the stock solution in the stock solution filtering channel 15 close to the inner cavity channel 12, the stock solution firstly passes through the supporting layer 11 and then passes through the inner membrane layer 13 to permeate into the inner cavity channel 12 to form a filtering solution; under the water pressure of the stock solution in the stock solution filtering channel 15 close to the outer wall of the supporting layer 11, the stock solution firstly passes through the supporting layer 11 and then passes through the outer membrane layer 14 to permeate to the periphery of the supporting layer 11 to form a filtering solution;
c: the filtrate flowing into the inner cavity channel 12 flows into the flow guide nozzles 24 of the upper flow guide disc 2 and the lower flow guide disc 3 under the water pressure, flows into the corresponding annular flow guide channels 21 from the flow guide nozzles 24, flows into the annular flow guide channels 21 of the adjacent inner layers from the communicating cylinders 23 between the annular flow guide channels 21, finally is collected into the central flow guide cylinder 22, and enters the filter barrel 4 from the lower end opening of the central flow guide cylinder 22;
d: the filtrate flowing into the periphery of the supporting layer 11 directly enters the filter barrel 4;
e: the filtrate in the filter vat 4 is discharged from the water outlet of the filter vat 4.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1 of the present invention
The supporting body 4 is of a cylindrical structure, a cylindrical inner cavity channel 12 is axially arranged at the center of the supporting body 4, the cross section area of the inner cavity channel 12 accounts for 1/5 of the cross section area of the supporting body 4, a supporting layer 11 is formed between the inner cavity channel 12 and the outer layer of the supporting body 4, the supporting layer 11 is made of carbon silica, the filtering precision of the supporting layer 11 is 10 microns, an inner membrane layer 13 and an outer membrane layer 14 of the supporting layer 11 are made of carbon silica, and the filtering precision of the inner membrane layer 13 and the outer membrane layer 14 is 300 nm; four layers which are arranged along the axial direction are arranged in the supporting layer 11, the raw material liquid filtering channels 15 are distributed in an asymmetric structure, the raw material liquid filtering channels 15 are cylinders, and the cross section area of each raw material liquid filtering channel 15 accounts for 1/8 of the cross section area of the supporting body 4.
The corresponding diversion nozzles 24 of the upper diversion disc 2 and the lower diversion disc 3 are in cylindrical structures.
By adopting the upper flow guide disc 2 and the lower flow guide disc 3 which are matched with the membrane element 1 and the using method of the invention, the water flow flux of the device is 2 times of that of the existing membrane element. Although the membrane element is also provided with a central lumen channel 12, the essential difference between the present invention and the existing structure is that the existing lumen channel 12 is fed with the raw liquid, not the filtered liquid. Only 20% of the stock solution can be filtered through the support layer 11, and 80% of the stock solution flows out directly or enters the next circulation. The invention only depends on the filtering between the raw material liquid filtering channel 15 and the supporting layer 11 to flow into the inner cavity channel 12 or the periphery of the supporting layer 11 in the near principle, so as to achieve the effects of quickly defibering, dispersing and filtering the raw material liquid, and the filtered liquid entering the inner cavity channel 12 finally enters the filter barrel 4 through the dredging of the upper flow guide disc 2 and the lower flow guide disc 3. The existing equipment is as follows: a plurality of membrane elements are arranged in the filter vat 4 in a parallel manner, gaps exist among the membrane elements, and two ends of the membrane elements are directly positioned and fixed through the vat cover. The invention is provided with the upper flow guide disc 2 and the lower flow guide disc 3 to quickly guide the filtrate in the inner cavity channel 12, thereby greatly improving the flow capacity.
Under the same condition, compared with the prior membrane element with the same specification, the flow rate of the raw material liquid can be reduced by 1/10-1/2; the permeation area is increased by 1-2 times, and on the basis, the filtrate flux of the membrane element can be increased by 1.5-5 times.
Example 2
The supporting body 4 is of a cylindrical structure, a polygonal (6-edge structure) inner cavity channel 12 is axially arranged at the center of the supporting body 4, the cross-sectional area of the inner cavity channel 12 accounts for 1/4 of the cross-sectional area of the supporting body 4, a supporting layer 11 is formed between the inner cavity channel 12 and the outer layer of the supporting body 4, the supporting layer 11 is made of aluminum oxide and zirconium oxide in a mixed mode, the filtering precision of the supporting layer 11 is 1 micron, an inner membrane layer 13 and an outer membrane layer 14 of the supporting layer 11 are made of aluminum oxide and zirconium oxide, and the filtering precision of the inner membrane layer 13 and the filtering precision of the outer membrane layer 14; be equipped with the three-layer along axial setting in the supporting layer 11 to the raw materials liquid filter passage 15 of asymmetric structure distribution, raw materials liquid filter passage 15 adopts multilateral body (adopting 6 limit structures) structure, and raw materials liquid filter passage 15 cross sectional area accounts for 1/6 of supporter 4 cross sectional area.
The corresponding flow guiding nozzles 24 of the upper flow guiding disc 2 and the lower flow guiding disc 3 are in 6-edge cylinder structures.
By adopting the upper flow guide disc 2 and the lower flow guide disc 3 which are matched with the membrane element 1 and the using method of the invention, the water flow flux of the device is 3 times of that of the existing membrane element.
Under the same condition, compared with the prior membrane element with the same specification, the flow rate of the raw material liquid can be reduced by 1/10-1/2; the permeation area is increased by 1-2 times, and on the basis, the filtrate flux of the membrane element can be increased by 1.5-5 times.
Example 3
The supporting body 4 is of a cylindrical structure, a triangular inner cavity channel 12 is axially arranged in the center of the supporting body 4, the cross section area of the inner cavity channel 12 accounts for 1/3 of that of the supporting body 4, a supporting layer 11 is formed between the inner cavity channel 12 and the outer layer of the supporting body 4, the supporting layer 11 is made of rubber, plastic or rubber-plastic composite materials, the filtering precision of the supporting layer 11 is 50 microns, an inner membrane layer 13 and an outer membrane layer 14 of the supporting layer 11 are made of aluminum oxide, zirconium oxide and titanium oxide in a mixed mode, and the filtering precision of the inner membrane layer 13 and the outer membrane layer 14 is 500 nm; be equipped with in the supporting layer 11 along the two-layer of axial setting to the former feed liquid filter passage 15 of asymmetric structure distribution, former feed liquid filter passage 15 adopts the triangle body structure, and former feed liquid filter passage 15 cross sectional area accounts for 1/4 of supporter 4 cross sectional area.
The corresponding flow guiding nozzles 24 of the upper flow guiding disc 2 and the lower flow guiding disc 3 are in a triangular prism structure.
By adopting the upper flow guide disc 2 and the lower flow guide disc 3 which are matched with the membrane element 1 and the using method of the invention, the water flow flux of the device is 5 times of that of the existing membrane element.
Under the same condition, compared with the prior membrane element with the same specification, the flow rate of the raw material liquid can be reduced by 1/10-1/2; the permeation area is increased by 1-2 times, and on the basis, the filtrate flux of the membrane element can be increased by 1.5-5 times.
When the ceramic membrane pipe fitting is used, raw material liquid enters the ceramic membrane pipe fitting through the raw material liquid filtering channel 15, under the driving of pressure, raw material liquid in the raw material liquid filtering channel 15 close to the inner cavity channel 12 passes through the raw material liquid filtering channel 15 and penetrates through the supporting layer 11 and the inner membrane layer 13 towards the nearby inner cavity along the vertical direction, macromolecular substances (or solid particles) are intercepted by the supporting layer 11, and small molecular substances penetrate into the inner cavity channel 12 through the supporting layer 11 and the inner membrane layer 13 to obtain filtered liquid; the filtrate enters the corresponding flow guide nozzles 24 at the end of the membrane tube inner cavity channel 12, flows into the corresponding annular flow guide channels 21 from the flow guide nozzles 24, flows into the annular flow guide channels 21 of the adjacent inner layers from the communicating cylinders 23 between the annular flow guide channels 21, finally converges to the central flow guide cylinder 22, and enters the filter barrel 4 from the lower end opening of the central flow guide cylinder 22; is collected and guided into a filter vat 4 matched with the membrane element 1.
Under the driving of pressure, the raw material liquid channels distributed along the outer side of the membrane element 1 permeate small molecular substances to the outer side of the membrane element 1 through the supporting layer 11 and the outer membrane layer 14 to obtain filtrate; macromolecular substances are intercepted by the supporting layer 11, and the filtrate outside the membrane element 1 and the filtrate collected in the inner cavity are simultaneously converged in the filter barrel 4 matched with the membrane element 1.
This practicality is through increasing the inner chamber passageway 12 of membrane element 1 to increased the infiltration area of membrane element 1, reduced the ratio of the seepage volume of circulation flow and transmission film, showing the permeability who improves ceramic membrane element 1. Meanwhile, according to the condition of water quality to be purified, the optimal permeability is achieved and the permeability is improved by the blending of the filtering precision of the inner membrane layer 13 and the outer membrane layer 14 and the reasonable configuration of the size of the raw material liquid filtering channel 15.
The tubular ceramic membrane element 1 adopts a circulating cross flow filtration mode, raw material liquid is made to do high-speed circulating motion in a channel through a circulating pump, the raw material liquid flows in parallel to a membrane surface under the driving of the pump, and filtrate is filtered in a tangential line passing mode under the action of pressure; greatly improving the production efficiency and saving energy.
The tubular ceramic membrane element 1 structure can produce membrane elements 1 with different specifications by changing the diameter of the channel and the parameters of the membrane element 1 according to actual requirements, thereby meeting the actual requirements.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A novel high-flux filtering device is characterized in that: the membrane element comprises a cylindrical support body, a cylindrical inner cavity channel is arranged in the center of the support body along the axial direction, a support layer is formed between the inner cavity channel and the outer layer of the support body, an inner membrane layer is arranged on the inner wall of the support layer, an outer membrane layer is arranged on the outer wall of the support layer, and two or more than two raw material liquid filtering channels which are arranged along the axial direction and distributed in an asymmetric structure are arranged in the support layer.
2. The novel high-throughput filtration device of claim 1, wherein: the membrane component is characterized by further comprising an upper flow guide disc and a lower flow guide disc, wherein the upper flow guide disc comprises a plurality of layers of annular flow guide channels and a central flow guide cylinder, the annular flow guide channels are sequentially sleeved from inside to outside by taking the central flow guide cylinder as a center, the upper end of the central flow guide cylinder is closed, the lower end of the central flow guide cylinder is open, every two adjacent layers of annular flow guide channels are connected through a communicating cylinder, the annular flow guide channel at the innermost layer is connected with the central flow guide cylinder through the communicating cylinder, the lower end of each annular flow guide channel is uniformly distributed and communicated with a plurality of flow guide nozzles, and each flow guide nozzle is in butt joint with the upper end; the lower guide disc and the upper guide disc are the same in structure and are symmetrical.
3. The novel high-throughput filtration device of claim 1, wherein: the cylindrical support body adopts a cylindrical structure.
4. The novel high-throughput filtration device of claim 1, wherein: the columnar inner cavity channel adopts a cylindrical or polygonal or triangular structure, and the cross-sectional area of the inner cavity channel accounts for 1/10-1/2 of the cross-sectional area of the support body.
5. The novel high-throughput filtration device of claim 1, wherein: the supporting layer is made of one or more of carbo-silica, silicon carbide, silicon nitride, alumina, zirconia and titanium oxide, and the filtering precision of the supporting layer is 0.1-50 um.
6. The novel high-throughput filtration device of claim 1, wherein: the supporting layer is made of rubber, plastic or rubber-plastic composite materials, and the filtering precision of the inner membrane layer and the outer membrane layer is 10nm-500 nm.
7. The novel high-throughput filtration device of claim 1, wherein: the inner film layer and the outer film layer are made of one or more of carbon silica, silicon carbide, alumina, zirconia and titanium oxide, and the filtering precision of the inner film layer and the outer film layer is 10nm-500 nm.
8. The novel high-throughput filtration device of claim 1, wherein: the raw material liquid filtering channel adopts a cylindrical or polygonal or triangular structure, and the cross-sectional area of the raw material liquid filtering channel accounts for 1/20-1/3 of the cross-sectional area of the support body.
9. The method of using any of the novel high-throughput filtration devices of claims 2 to 7, wherein: comprises the following steps:
a: firstly, injecting stock solution into a stock solution filtering channel, filtering the stock solution from the stock solution filtering channel to the inside and the outside of a supporting layer in a penetrating way under the water pressure, and penetrating according to the principle of being nearby in the filtering process;
b: under the water pressure of the stock solution in the stock solution filtering channel close to the inner cavity channel, the stock solution firstly passes through the supporting layer and then passes through the inner membrane layer to permeate into the inner cavity channel to form a filtering solution; under the water pressure of the stock solution in the stock solution filtering channel close to the outer wall of the supporting layer, the stock solution firstly passes through the supporting layer and then passes through the outer membrane layer to permeate to the periphery of the supporting layer to form a filtrate;
c: the filtrate flowing into the inner cavity channel flows into the flow guide nozzles of the upper flow guide disc and the lower flow guide disc under the water pressure, flows into the corresponding annular flow guide channels from the flow guide nozzles, flows into the annular flow guide channels of the adjacent inner layers from the communicating cylinder between the annular flow guide channels, finally is collected into the central flow guide cylinder, and enters the filter barrel from the lower end opening of the central flow guide cylinder;
d: the filtrate flowing into the periphery of the supporting layer directly enters the filter barrel;
e: the filtrate in the filter vat is discharged from the filter vat water outlet.
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|---|---|---|---|---|
| CN113559709A (en) * | 2021-08-06 | 2021-10-29 | 烟台金正环保科技有限公司 | Reverse osmosis membrane element applied to high-power concentration |
| CN113559709B (en) * | 2021-08-06 | 2023-01-31 | 烟台金正环保科技有限公司 | Reverse osmosis membrane element applied to high-power concentration |
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Application publication date: 20200228 |