CN218901431U - Hydrophilic oleophobic roll-type membrane module - Google Patents

Abstract

The utility model relates to a hydrophilic oleophobic roll type membrane assembly, which comprises a membrane shell, a membrane core and an end head assembly, wherein the membrane core is positioned in the membrane shell, the end head assembly is positioned at two ends of the membrane shell, the membrane core is packaged in the membrane shell, the membrane core comprises membrane pages, a concentrated water flow channel, a central tube and end plates, the membrane pages are formed by sandwiching water production cloth between two layers of hydrophilic oleophobic membrane sheets, the concentrated water flow channel is in a corrugated structure, the membrane pages and the concentrated water flow channel are arranged at intervals, a multilayer spiral structure is wound around the central tube, water production overflow holes are formed in the central tube, and the end plates fix the membrane assembly at two ends of the central tube. The membrane component adopts a membrane which is more resistant to oil and dirt and is blocked than a PVDF membrane, has a hydrophilic oleophobic surface, is resistant to pollution and is easy to clean, and adopts a membrane core with a specific structure and a membrane component structure, so that the membrane component prepared from the material has excellent oil resistance and dirt blocking resistance and can provide a good pretreatment effect.

Description

Hydrophilic oleophobic roll-type membrane module

Technical Field

The utility model relates to the field of sewage treatment, in particular to a hydrophilic oleophobic roll type membrane component.

Background

The treatment of industrial wastewater has become a common knowledge of society and various industries, and along with the continuous improvement of water resource recycling and emission standards, the treatment difficulty of industrial wastewater is also increased, the treatment process and flow are also refined, and the intermediate process can be generally divided into pretreatment, advanced treatment, concentration decrement treatment and the like.

The pretreatment of industrial wastewater is generally aimed at indexes such as (high) suspended matters, hardness, organic colloid, oil and the like, and for the indexes of the hardness and the high suspended matters, the removal can be directly realized through membrane softening and interception, currently, a commonly used membrane product is provided with a hollow fiber ultrafiltration membrane and a tubular ultra/micro filtration membrane, and for the hollow fiber ultrafiltration membrane product, the hollow fiber ultrafiltration membrane product must be used in combination with flocculation precipitation and sand filtration processes in the field of industrial wastewater treatment, the membrane structure of the hollow fiber ultrafiltration membrane product has a yarn breakage risk and an introduced sand filtration system has a hardening risk, so that the defects of long pretreatment flow, large process occupation area, poor system stability and the like exist in sand filtration and hollow fiber ultrafiltration; for the tubular ultrafiltration/microfiltration membrane product, the process flow is short, the raw water adaptability is high, the service life of the membrane component is long, but the system occupation area of the tubular membrane is large due to the influence of the filling density, the engineering cost is extremely high, and therefore, the cost performance of the tubular ultrafiltration/microfiltration membrane product is not high.

For organic colloid and oil indexes, the indexes are very challenging to membrane water treatment, firstly, the organic membranes are most commonly rolled membranes except hollow fibers and tubular structural forms, the membrane materials are not resistant to organic matters and oil and are sensitive to suspended matters indexes, the colloid and oil indexes are very easy to cause mucous membrane and dirt blockage, secondly, the membrane of a conventional rolled membrane element is composed of a supporting layer and a membrane layer, the synthesis process is surface coating, the bonding strength of the membrane layer and the supporting layer is weak, so that only pressure is allowed on the surface of the membrane layer, the membrane element cannot be backwashed, the dirt blockage cleaning recovery is poor, the service life of a membrane product is finally and directly influenced, in addition, the conventional rolled membrane is usually a parallel or diamond grid, the grid intersection is dead angle, the pollution is easy to silt, the flow channel is easy to block, the membrane performance problem is caused, the current rolled ultrafiltration membrane has requirements on water inlet suspended matters, the general film inlet SS is less than 100mg/L, the following problems often occur in application: the corrugated grids and the membrane pages are arranged at intervals, the grids and the membrane pages are easy to deform due to overtightening of pressure during rolling or to move in series due to overtightening of pressure during operation of the membrane assembly, the surface of the channel is smooth, the cross flow scouring effect is poor, and the good washing and cleaning effects cannot be achieved.

Inorganic membranes have better tolerance to colloid and oil indexes than organic membranes, but have lower filtration accuracy and high cost per se, so that the overall interception effect and the cost performance are not high.

Disclosure of Invention

The utility model provides a hydrophilic oleophobic roll-type membrane component, which is prepared from a special membrane material, has the advantages of organic and inorganic materials, has a hydrophilic oleophobic surface close to the inorganic materials, is more oil-resistant and dirt-resistant, has high filtering precision and concentrated pore size distribution, has high-precision and high-flux characteristics, is not easy to generate deep dirt blockage, and can provide a good pretreatment effect.

The utility model provides a hydrophilic oleophobic roll-type membrane module, contains membrane shell, membrane core and end subassembly, the membrane core is located the membrane shell, and end subassembly is located membrane shell both ends, encapsulates the membrane core in the membrane shell, the membrane core includes membrane page, dense water runner, center tube and end plate, the membrane page is by double-deck hydrophilic oleophobic membrane piece intermediate clip product water cloth composition, dense water runner is corrugated structure, membrane page and dense water runner interval set up, twine into multilayer helical structure around on the center tube, be equipped with the water production overflow hole on the center tube, the end plate is fixed membrane module at the both ends of center tube.

Further, protruding points are respectively arranged on two sides of the wave crest and the wave trough of the corrugated dense water channel.

Further, the corrugated structure is rolled up radially and is provided with the strengthening rib, strengthening rib and corrugated structure integrated into one piece.

Further, the membrane core comprises two sections of membrane core units, the two membrane core units are connected through a membrane core connecting piece, the diameter of the membrane core connecting piece is the same as the inner diameter of the membrane core tube, and O-shaped sealing rings are arranged at two ends of the membrane core connecting piece.

Further, the end head assembly comprises a thrust ring, a membrane core adapting end plate and a stop block assembly, wherein the membrane core adapting end plate is propped against the membrane core and is assembled with the membrane core, the stop block assembly is arranged outside the membrane core adapting end plate and is clamped into a clamping groove in the membrane shell, and the thrust ring is positioned between a gap of the membrane core and a gap of the membrane core adapting end plate; the membrane assemblies are provided with openings on the membrane shells of the thrust ring sections.

When water is produced at one end of the membrane component, the membrane core adapting end plate at the other end is sealed by adopting a head sealing plug.

The membrane in the hydrophilic oleophobic coiled membrane component is made of modified PTFE, polyaniline or derivatives thereof and other materials, the intercepting aperture of the membrane is 20 nanometers, the acid-base tolerance range is 1< PH <13.5, the contact angle between water drops and the membrane is 40.0+/-0.8 degrees, the contact angle between the oil drops and the membrane is 20+/-0.8 degrees, the pure water permeability is 80-90 lmh/bar, the BSA interception rate is 60-70 percent, and the free chlorine tolerance is 100 ppm-300 ppm.

The beneficial effects of the utility model are as follows: according to the membrane component, the membrane of the membrane separation layer is prepared by using a hydrophilic oleophobic material, a rolled membrane core is prepared by taking the membrane as a base, and meanwhile, the rolled membrane core is provided with a reinforcing rib and a corrugated grid with surface salient points, so that the membrane component can be transversely installed and also can be vertically installed, and can drain water through the end part due to sedimentation, compared with the 4-core-6-core of a normal rolled membrane, only the transverse installation can be realized, pollutants in the membrane shell are easily accumulated, structural stability above 4-core is greatly enhanced, the maintenance cannot be accurately positioned, and the like; the two ends of the membrane core are sealed by the sealing rings, so that raw material liquid is prevented from penetrating, when one end needs to be discharged, the opening of the membrane core adaptation end plate at the water inlet end is sealed by the end sealing plug, the stop block assembly outside the membrane core adaptation end plate is clamped into the clamping groove inside the membrane shell, and the end block assembly is more firmly installed and is not easy to fall off; the membrane core is made of polyaniline material with high flux, high interception, pollution resistance and easy cleaning characteristics, and a membrane product made of a corrugated structure, wherein the pore diameter of the membrane is concentrated at about 20nm, the running-resistant PH range is 1-13.5, the membrane core can resist high temperature of 0-90 ℃, and the membrane core can be washed by hot alkali, so that the cleaning recovery of the membrane performance is greatly enhanced, and the service life is prolonged; can treat wastewater with oil content of 150ppm, suspended matter of 3000ppm, oil content of produced water of less than 5ppm and SS of less than 1ppm.

The membrane component has the advantages of small membrane pore diameter, centralized distribution, high filtering precision, difficult deep layer blockage generation, higher colloid and COD removal rate and maximum oil content of 150 mg/L; compared with the conventional ultrafiltration membrane, the hydrophilic oleophobic roll-type membrane component has larger membrane area, and the flux of the water treatment membrane is higher and can reach 120LMH; the hydrophilic oleophobic roll-type membrane module ultrafiltration membrane adopting the special membrane layer can resist water inlet suspended matters of 3000ppm at most. The membrane element of the hydrophilic oleophobic roll type membrane is also roll type, and the synthesis of the support layer and the membrane layer is carried out through a special process, so that the membrane layer is partially embedded into the support layer.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of a membrane module according to the present utility model;

FIG. 2 is a schematic view of the structure of the head assembly of the present utility model;

FIG. 3 is a schematic end structure of a film core of the present utility model;

FIG. 4 is a schematic view of the structure of a membrane page according to the present utility model;

FIG. 5 is a schematic view of the structure of the concentrate channel according to the present utility model;

FIG. 6 is a surface view of a diaphragm of the present utility model;

wherein, 1, a film shell; 2. a membrane core; 3. a head assembly; 4. a film core unit; 5. a membrane core connector; 6. an O-shaped sealing ring; 7. a thrust collar; 8. the membrane core is matched with the end plate; 9. a stop assembly; 10. a protective sleeve; 11. a tip seal plug; 12. a saddle; 13. a strapping; 14. a film sheet; 15. a concentrated water flow passage; 16. a central tube; 17. end plates, 18, reinforcing ribs; 19. a bump.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples.

As shown in fig. 1 to 2, a hydrophilic oleophobic roll-type membrane module, the membrane module includes membrane shell 1, membrane core 2 and end subassembly 3 are constituteed, membrane core 2 is located membrane shell 1, end subassembly 3 is located membrane shell 1 both ends, encapsulate membrane core 2 in membrane shell 1, membrane core 2 includes two sections membrane core units 4, connect by membrane core connecting piece 5 between two membrane core units 4, the diameter of membrane core connecting piece 5 is the same with membrane core 2 membrane pipe internal diameter, the both ends of membrane core connecting piece 5 all are equipped with O type sealing washer 6,O type sealing washer 6 and play sealed effect between membrane core connecting piece and the membrane core, can avoid the weeping.

The end head assembly 3 comprises a thrust ring 7, a membrane core adapting end plate 8 and a stop block assembly 9, wherein the membrane core adapting end plate 8 reaches the membrane core and is assembled with a membrane pipe of the membrane core 2 and is sealed by an O-shaped sealing ring 6, the stop block assembly 9 is arranged outside the membrane core adapting end plate 8, the stop block assembly 9 is clamped into a clamping groove in the membrane shell 1, and the thrust ring 7 is positioned between a gap of the membrane core 2 and the membrane core adapting end plate 8; the membrane module is provided with openings on the membrane shell of the thrust ring 7 section, and the openings are provided with protective sleeves 10 which are mainly used for protecting the openings when the membrane module is stored.

The membrane core adapting end plate 8 at one end of the membrane component is provided with an end sealing plug 11, the two ends of the membrane component are the same, when water is fed into one end of the membrane component, water is produced from the other end of the membrane component, and the membrane core adapting end plate 8 at the water feeding end is sealed by the end sealing plug; the outer surface of the membrane shell is also provided with a saddle 12 and a binding belt 13, and the saddle 12 and the binding belt 13 can be selectively installed according to the actual use requirement and are used for fixing the membrane assembly; the membrane component is of a two-section structure with two core assemblies, can be transversely or vertically installed during installation, and can drain sewage through the end part for sedimentation.

When the membrane module is used, when one end is drained, one end provided with the end sealing plug is filled with water, raw water enters through an opening on the membrane shell provided with the thrust ring end of the end sealing plug, concentrated water exits through an opening on the membrane shell provided with the thrust ring end of the other end, produced water flows out through an opening on the membrane core adapting end plate, and the membrane module can be transversely or vertically installed, generally, water can be laterally filled and discharged, water can be axially produced, and water can be produced at two ends or one end.

The membrane of the water-oleophobic coiled membrane component is made of modified PTFE, polyaniline or derivatives thereof.

The test membrane performance is as follows:

wherein, as shown in fig. 3 to 6, the membrane core 2 includes a membrane sheet 14, a concentrate flow passage 15, a central tube 16, and an end plate 17; the concentrated water channel 15 is of a corrugated structure, a produced water flow hole is arranged on the central tube 16, end plates 17 are arranged at two ends of the central tube, and a membrane assembly is fixed; the membrane sheet 14 and the concentrated water channel 15 are arranged at intervals and are wound on the central tube 16 to form a multi-layer spiral structure; the membrane page 14 is composed of two layers of water cloth sandwiched between membranes made of hydrophilic and oleophobic materials, the intercepting aperture of the membrane is 15-25 nanometers, 95% is concentrated at 20 nanometers, the acid-base tolerance range is 1< PH <13.5, the contact angle between water drops and the membrane is 40 DEG+ -0.8 DEG, the contact angle between oil drops and the membrane is 20 DEG+ -0.8 DEG, the pure water permeability is 80-90 lmh/bar, the BSA interception rate is 60-70%, and the free chlorine tolerance is 100 ppm-300 ppm; the temperature tolerance ranges from 0 to 90 ℃.

The dense water channel 15 is of a corrugated structure, the corrugated structure is radially provided with reinforcing ribs 18 in a rolling way, and the reinforcing ribs 18 and the corrugated structure are integrally formed; the extrusion deformation of the runner caused by overtightening is avoided when the film core is rolled, and the phenomenon that the adhesive part of the film page glue is cracked due to the deformation of the runner, so that liquid leakage is caused can be well avoided; the two sides of the wave crest and the wave trough of the corrugated concentrated water flow channel are provided with the protruding points 19, and water flow can form turbulence when passing through the protruding points on the surface of the flow channel, so that the surface scouring effect is greatly enhanced, and the membrane is not easy to form dirt blockage.

The membrane has better heat and chemical stability, hydrophilic and oleophobic membrane surface, the component design of the coiled membrane and the operation advantage of the tubular membrane, and ensures that the membrane product has the characteristics of high flux, high interception, pollution resistance, chemical resistance, high temperature resistance and easy cleaning. The membrane component product can treat wastewater with the oil content of 150ppm, the suspended matter of 3000ppm, and the oil content of produced water is less than 5ppmm and the SS is less than 5ppmm.

The parameters of the membrane component of the structure of the utility model are as follows:

the cost of the hydrophilic oleophobic coiled membrane component formed by the membrane is superior to that of the tubular ultrafiltration/microfiltration membrane product and sand filtration and hollow fiber ultrafiltration adopted in the traditional pretreatment in the use process of pretreatment such as oily wastewater.

Taking 1500 tons of water treated every day as an example, the required membrane investment of the hydrophilic oleophobic roll type membrane module is 28, 4 ten thousand/year and 112 ten thousand total equipment investment of the hydrophilic oleophobic roll type membrane module is 60 ten thousand, the total investment is 172 ten thousand, the service life of the hydrophilic oleophobic roll type membrane module is longer than 5 years, the average annual total investment is about 30 ten thousand/year, the running cost is about 170 ten thousand/year, and the equipment investment running cost is 200 ten thousand/year; the membrane investment required by the tubular ultrafiltration/microfiltration is 115, 3 ten thousand/count, totally 345 ten thousand, the total investment is 585 ten thousand, the service life of the tubular ultrafiltration/microfiltration membrane component is 3-5 years, the average total annual investment is about 100 ten thousand/year, the running cost is about 335 ten thousand/year, and the equipment investment running cost is 435 ten thousand/year; the required membrane investment for sand filtration and hollow fiber ultrafiltration is 24 counts, 1 ten thousand per year, the total investment is 114 ten thousand, the service life of the tubular ultrafiltration/microfiltration membrane component is 2-3 years, the average total investment per year is about 21 ten thousand per year, the running cost is about 220 ten thousand per year, and the equipment investment running cost is 241 ten thousand per year.

From the viewpoint of equipment investment running cost in the embodiment, compared with tubular ultrafiltration/microfiltration and sand filtration and hollow fiber ultrafiltration, the hydrophilic oleophobic roll-type membrane module can save the economic cost of 40 ten thousand yuan per year, and has great cost advantage.

The foregoing has shown and described the basic principles, main features and advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (5)

1. The utility model provides a hydrophilic oleophobic roll-type membrane module, contains membrane shell, membrane core and end subassembly, the membrane core is located the membrane shell, and end subassembly is located membrane shell both ends, encapsulates membrane core in the membrane shell, its characterized in that: the membrane core comprises a membrane page, a concentrated water flow channel, a central tube and end plates, wherein the membrane page is composed of two layers of hydrophilic and oleophobic membrane sheets, water producing cloth is clamped between the two layers of hydrophilic and oleophobic membrane sheets, the concentrated water flow channel is of a corrugated structure, the membrane page and the concentrated water flow channel are arranged at intervals, the membrane page and the concentrated water flow channel are wound on the central tube to form a multi-layer spiral structure, water producing overflow holes are formed in the central tube, and the end plates fix membrane assemblies at two ends of the central tube.

2. A hydrophilic oleophobic roll-up membrane assembly according to claim 1 wherein: and protruding points are respectively arranged on two sides of the wave crest and the wave trough of the corrugated dense water channel.

3. A hydrophilic oleophobic roll-up membrane assembly according to claim 1 wherein: the corrugated structure rolling machine is characterized in that reinforcing ribs are radially arranged on the corrugated structure rolling machine, and the reinforcing ribs and the corrugated structure are integrally formed.

4. A hydrophilic oleophobic roll-up membrane assembly according to claim 1 wherein: the membrane core comprises two sections of membrane core units, the two membrane core units are connected through a membrane core connecting piece, the diameter of the membrane core connecting piece is the same as the inner diameter of a membrane core tube, and O-shaped sealing rings are arranged at two ends of the membrane core connecting piece.

5. A hydrophilic oleophobic roll-up membrane assembly according to claim 4 wherein: the end head assembly comprises a thrust ring, a membrane core adapting end plate and a stop block assembly, wherein the membrane core adapting end plate is propped against the membrane core and assembled with the membrane core, the stop block assembly is arranged outside the membrane core adapting end plate and is clamped into a clamping groove in the membrane shell, and the thrust ring is positioned between the membrane core and a gap of the membrane core adapting end plate; the membrane assemblies are provided with openings on the membrane shells of the thrust ring sections.

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