CN104587833A - Ultrafiltration membrane module and method for treating high-turbidity water by using same - Google Patents
Ultrafiltration membrane module and method for treating high-turbidity water by using same Download PDFInfo
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- CN104587833A CN104587833A CN201510034124.6A CN201510034124A CN104587833A CN 104587833 A CN104587833 A CN 104587833A CN 201510034124 A CN201510034124 A CN 201510034124A CN 104587833 A CN104587833 A CN 104587833A
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Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses an ultrafiltration membrane module and a method for treating high-turbidity water by using the same. The ultrafiltration membrane module comprises a shell and a filter element, wherein the filter element is composed of a membrane filament and a membrane seal cover; the membrane seal cover divides the inner cavity of the shell into upper and lower parts, namely a water production cavity and a filtering cavity, the membrane filament is located in the filtering cavity, and the two ends of the membrane filament are fixed on the membrane seal cover, and communicated with the water production cavity; the shell is provided with a water production opening which is communicated with the water production cavity, and a water inlet and a concentrated water outlet which are communicated with the filtering cavity; and the concentrated water outlet is formed in the top of the shell, and communicated with the filtering cavity by a central tube passing through the membrane seal cover, and the water inlet is formed in the bottom of the shell. The ultrafiltration membrane module disclosed by the invention is easily disassembled and strong in staining resistance, and sewage blocking is not easily caused.
Description
Technical field
The present invention relates to emergent water-treatment technology field, particularly relate to a kind of method of hyperfiltration membrane assembly and process ultra thereof.
Background technology
Ultra is common river pollution type, and the total discharge of sediment of the Changjiang river and the Yellow River occupies first of 13 great river totals discharge of sediment in the world.In recent years, the natural calamities such as earthquake, mountain torrents, mud-rock flow take place frequently, and also cause water system to destroy, drinking water source is subject to the pollution of silt, and Drinking Water is difficult to ensure, drinking water safety receives much concern.For this problem, if defensive measure can not be taked in time, grave danger will be formed to ecological environment and people life property safety.
For the ultra that silt content is higher, conventional process generally adopts the method for dosing coagulation.The exploitation of macromolecule and compound coagulant makes treatment effect promote significantly, but generally, coagulation and precipitation structures take up an area comparatively large, and processing procedure adds with certain chemical reagent, and operational administrative is comparatively complicated.In recent years, membrane technology is simple to operate because of it, and the development in drinking water treatment application such as obvious processing effect is rapid, and wherein, ultrafiltration has good removal effect to suspension, turbidity.
For decelerating membrane pollution, ultrafiltration there are certain requirements water inlet, generally within 10NTU.Under emergency condition, often turbidity higher (hundreds of is even thousands of), therefore, research also receives much concern day by day for the water technology of ultra efficiently.
In the market for the milipore filter of water treatment substantially based on doughnut, hollow fiber film assembly can be accomplished very miniaturized, due to without supporter, hundreds of thousands can be filled to up to a million doughnuts in assembly, loading density is large, aquifer yield is high, but shortcoming is that face scale removal is more difficult, and film is once damage and cannot upgrade.Usual polysulfone hollow fiber ultrafiltration membrane system arranges central tube in cylindrical shell, is placed in by milipore filter tin between inwall and central tube, and is fixed it at cylindrical shell two ends resin.This structure is generally equidistantly arranged side by side, and layout is reasonable not, easily produces clean dead angle, and easily makes the impaired distortion of film silk, skewness.Meanwhile, along with the prolongation of membrane module service time can produce impurities left in membrane module, periodic cleaning need be carried out.Visible, the main bugbear that current hollow fiber ultrafiltration membrane faces in the application is fouling membrane and fracture of wire problem, and these problems not only increase investment and operation maintenance burden, also limit the application of hyperfiltration technique.
For produced problem, some propose different solutions, such as patent 200820011362 provides a kind of novel ultrafiltration membrane assembly, ultrafiltration membrane filaments is formed chipware to be placed in tubulose pressure casing, inside the backwash liquor import mouth of pipe, perforated baffle is installed, with fluid sealant, each assembly is bonded as one by each clearance seal, reduces wire broken rate with this, improve the membrane filtration ability of backwash process, improve backwash recovery effects.Patent 201120552759 provides a kind of external pressing type hollow fibrous membrane ultrafiltration module with antipollution structure, it interts along hollow fiber film yarn length direction to be provided with multiple variable cross section-type turbulence promoter, fouling membrane and concentration polarization phenomenon are effectively controlled, improve filter efficiency, extend the service life of membrane module.It is a kind of polysulfone hollow fiber ultrafiltration membrane system improving central duct structure that patent 201120517955 provides, and it is by apopore in centre pipe interlaced arrangement on the surface, not easily produces dirt dead angle, strengthens cleaning performance.Patent 201110179385 relates to a kind of polysulfone hollow fiber ultrafiltration membrane system with grid, it is axially fixed with flase floor at centre pipe, certain fixing and support strengthening action is played to the fiber ultrafiltration membrane being fixed on bearing shell inside, the distortion of film during backwash can be reduced, extend the service life of film.Patent 201110179369 provides a kind of polysulfone hollow fiber ultrafiltration membrane system with stiffening plate, its feature is a center baffle to be fixed on membrane module inwall, center baffle in putamina has film silk strengthens the effect of perpendicularity, and normally running surface at membrane module, to be not easy to produce dirt residual and strengthen cleaning performance.
But the prioritization scheme proposed be all for Membrane cleaning, extend membrane lifetime in a certain respect, Optimal improvements is further development space in addition.Therefore, research and development are applicable to ultra's process, to Membrane cleaning, extending membrane lifetime, to carry out the hyperfiltration membrane assembly of major tuneup significant, meet market demands, have good development prospect.
Summary of the invention
The invention provides a kind of method of hyperfiltration membrane assembly and process ultra thereof, this hyperfiltration membrane assembly be quick detachable, antifouling property by force and not easily cause dirty stifled.
A kind of hyperfiltration membrane assembly, comprise shell and filter core, described filter core is made up of film silk and film capping, shell inner cavity is divided into by described film capping produces water cavity and the upper and lower two parts of filter chamber, described film silk is positioned at filter chamber inside, and two ends are fixed in film capping, and is communicated with product water cavity; Described shell is provided with and the product mouth of a river of producing water cavity and being communicated with, and the water inlet be communicated with filter chamber and dense water out; Described dense water out is located at cover top portion, and is communicated with filter chamber by the central tube through film capping, and described water inlet is located at the bottom of shell.
Water inlet is arranged at outer casing bottom by described hyperfiltration membrane assembly, produces the mouth of a river and is located at shell upper, can coordinate air purge, significantly improve the antifouling property of hyperfiltration membrane assembly, and not easily causes dirty stifled, can remove the pollutants such as the particle of film silk periphery, colloid, bacterium.The two ends of described film silk are all fixed in film capping, form U-shaped, make film silk produce vibration with water flow fluctuation in ultra-filtration process, impel being attached to film silk outer surface dirt and coming off, and can reduce hyperfiltration membrane assembly and occur dirty stifled probability.Hyperfiltration membrane assembly inside forms cross-flow filtration operational mode, makes filter membrane surface not easily produce concentration polarization phenomenon and scale problems, filters transmitance and decays slower.
Described shell is made up of end cap and body, and end cap and body are fixed by anchor ear, and the joining place of end cap and body is provided with annular groove, and corresponding film capping periphery is provided with the annular protrusion matched, and is convenient to dismounting and the cleaning of hyperfiltration membrane assembly.Film capping periphery is also provided with O-ring seal, for the sealing at film capping and end cap, body contacts place.
Described film silk is Kynoar (PVDF) Hollow-fibre membranes material, and this strength of materials is high, antifouling property good, can reduce film silk fracture rate, increase the service life; Film silk also can adopt PP, PES, PVC Hollow-fibre membranes material or carbon fiber filter post.
Described film capping is provided with the centre bore passed through for central tube, and described central tube is two-part structure, is respectively linkage section and main paragraph, and its middle connecting segment connects dense water out and centre bore, and centre bore is inserted in main paragraph one end, and the other end extends in filter chamber.Dense water not by film silk is discharged from central tube through compression pump effect.
The bottom of described filter chamber is provided with water distributing plate, and water distributing plate is evenly provided with water distributing pore.The shape of water distributing pore, without strict demand, as preferably, adopts strip; Former water is evenly distributed after water distributing pore, is beneficial to follow-up ultra-filtration process.As preferably, the angle of described water distributing pore and horizontal plane is 60 ~ 90 degree, more preferably 60 ~ 70 degree.Be designed to by water distributing pore, current easily form turbulent flow, not only improve the effect of current scour film silk periphery polluter, and the film silk caused because current too concentrate also can be avoided to break up or thrust.
Described central tube extends to water distributing plate place, free end end-enclosed, has dense water inlet near the region of film capping.Fail through milipore filter and the dense water that left behind enters in central tube by dense water inlet, and to discharge outside membrane module through compression pump.
Present invention also offers a kind of method utilizing described hyperfiltration membrane assembly process ultra, former water is passed into from water inlet, by pressurization, former water is entered in filter chamber and carry out film ultrafiltration, obtain and produce water and dense water, produce water and flow into product water cavity through film silk inner chamber, flow out from the product mouth of a river, dense water, after central tube, flows out from dense water out again.
As preferably, in controlled filter chamber, the flow velocity of water is 0.05 ~ 0.095m/s.The former water of this flow velocity, after water distributing plate water distribution uniformity, not only can make former water be uniformly distributed in around film silk, can also ensure to cause film silk break up or rupture because current are excessive.Described product water is 1: 0.5 ~ 3 with the cross-flow ratio of dense water.The cross-flow of described product water and dense water is than referring in hyperfiltration membrane assembly of the present invention the ratio producing mouth of a river place flow velocity and dense water out place flow velocity.
Compared with prior art, the present invention has following beneficial effect:
(1) hyperfiltration membrane assembly that the present invention adopts U-shaped film silk to design carries out intaking from shell lower end when ultra processes, water is produced from shell upper end, realize air water and combine flushing, significantly improve the antifouling property of hyperfiltration membrane assembly, and not easily cause dirty stifled, the pollutants such as the particle of film silk periphery, colloid, bacterium can be removed, be suitable for the process of emergency ultra;
(2) hyperfiltration membrane assembly of the present invention is external-compression type membrane module structure, and accessible former water type is comparatively wide, and permeate safety is high.
Accompanying drawing explanation
Fig. 1 is the structural representation of hyperfiltration membrane assembly of the present invention;
Fig. 2 is the explosive view of hyperfiltration membrane assembly of the present invention;
Fig. 3 be hyperfiltration membrane assembly of the present invention partly cut open figure;
Fig. 4 is the process schematic representation of hyperfiltration membrane assembly process ultra of the present invention;
1, surface water; 2, water pump; 3, raw water box; 4, booster pump; 5, dense water out; 6, water is produced; 7, intake;
Fig. 5 is the service data of application examples 1 of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, hyperfiltration membrane assembly of the present invention is further detailed.
Embodiment 1
As shown in Figure 1, 2, a kind of hyperfiltration membrane assembly, comprises the shell 1 and filter core that are manufactured by PP material.Wherein, shell 1 is in cylindric, and shell 1 is made up of the end cap 5 on top and the body 6 of bottom, and the top of end cap 5 is provided with dense water out 7, and the sidepiece of end cap 5 is provided with and produces the mouth of a river 8; The bottom sidewall of body 6 is provided with water inlet 2.
Filter core is made up of film capping 3 and film silk 4.Film silk 4 is Kynoar (PVDF) hollow-fibre membrane, and the caliber of film silk 4 is 1.25 ~ 1.35mm, and the aperture of fenestra is 0.03 ~ 0.1 μm; Film silk 4 is bent to form " U " type, film capping 3 is made up of the note core being circular PP shell and rubber seal, the material rubber seals such as the two ends epoxy resin of every root film silk or polyurethane are in circular shell, note core adopts the material such as epoxy resin or polyurethane, overlooks the port that film capping 3 can see film silk 4.Film silk 4 also can be PES, PVC, PP hollow-fibre membrane.
As shown in Figure 2,3, end cap 5 and body 6 are fixed by O type anchor ear 12, end cap 5 is provided with the groove 9 of annular with the joining place of body 6, the periphery of the film capping 3 that groove 9 is corresponding is provided with the annular protrusion 10 matched, and the both sides of annular protrusion 10 are provided with and are respectively equipped with an O-ring seal 11.
The inner chamber of shell 1 is divided into by film capping 3 produces water cavity 13 and filter chamber 14, and filter chamber 14 has and is divided into upper and lower two parts, and top is ultrafiltration region, and this ultrafiltration region is communicated with dense water out; Bottom is divided into inlet area, and this inlet area is communicated with water inlet 2.Film silk 4 is positioned at the ultrafiltration intra-zone of filter chamber 14, and two-port is communicated with product water cavity 13, produces water cavity 13 and is communicated with the product mouth of a river 8 on shell.Shell 1 inside is also provided with central tube, and film capping 3 is provided with the centre bore 17 passed through for central tube, and central tube runs through whole film capping 3 by centre bore 17, and one end of central tube is communicated with filter chamber 14, and the other end is communicated with dense water out 7.Central tube is two-part structure, is respectively linkage section 15 and main paragraph 16, and wherein, linkage section 15 connects dense water out 7 and centre bore 17, and centre bore 17 is inserted in main paragraph 16 one end, and the other end extends in filter chamber 14.Close proximity or there is a certain distance between linkage section 15 and main paragraph 16.Linkage section 15 and pus export between 7, between linkage section 15 and film capping 3, between main paragraph 16 and film capping 3 and are equipped with paired sealing ring 20.
The bottom of filter chamber 14 is provided with water distributing plate 18, and water distributing plate is evenly provided with water distributing pore 19, and water distributing pore is strip, and specification is 4 × 25mm, and water distributing pore 19 is 70 degree with the angle of horizontal plane.Central tube extends to water distributing plate 18 place, free end end-enclosed, has dense water inlet 21 near the region of film capping.
Above-mentioned hyperfiltration membrane assembly be used for ultra process technological process and the course of work as follows:
As shown in Figure 4, surface water enters in raw water box by water pump, and by booster pump, former water (ultra) is pumped into from the water inlet of hyperfiltration membrane assembly outer casing bottom, water inlet also can pass into air, namely air purge is coordinated, make former water by forming turbulent flow after the even cloth of water distributing plate by pressurization, and enter in filter chamber and carry out film ultrafiltration, to be blocked in milipore filter periphery by milipore filter by pollutants such as the particle in the former water of film ultrafiltration, colloid and bacteriums and form dense water, dense water enters central tube through the dense water inlet of central tube, and is pumped out dense water out; Pure water enters film silk inner chamber by milipore filter, and enters product water cavity, pumps by producing the mouth of a river; Due to the effect of water distributing plate, former water can form turbulent flow when entering filter chamber, is adding that the U-shaped place of film silk is not for also fixing, makes the current upwards flowed can wash away the dirt of ultrafiltration membrane surface while ultrafiltration, and then reduce dirty stifled phenomenon, extend hyperfiltration membrane assembly service life.
Application examples 1
The hyperfiltration membrane assembly described in embodiment 1 is adopted to carry out emergent water treatment test, water inlet is ultra, turbidity is 40NTU, ultra is passed into from water inlet, by pressurization, former water is entered in filter chamber and carry out film ultrafiltration, regulate the flow rate of water flow of former water in filter chamber to be 0.05m/s, and product water is 3: 3 with dense water cross-flow ratio (producing the ratio of mouth of a river place flow velocity and dense water out place flow velocity), continuous operation one hour, delivery turbidity is less than 0.4NTU, and clearance is greater than 99%.Result as shown in Figure 5.
Application examples 2
The hyperfiltration membrane assembly described in embodiment 1 is adopted to carry out emergent water treatment test, water inlet is high turbidity raw sewage, turbidity is 70NTU, high turbidity raw sewage is passed into from water inlet, by pressurization, former water is entered in filter chamber and carry out film ultrafiltration, regulate the flow rate of water flow of former water in filter chamber to be 0.95m/s, and product water is 1: 2 with dense water cross-flow ratio, continuous operation one hour, delivery turbidity is less than 0.4NTU, and clearance is greater than 99.4%.
Claims (8)
1. a hyperfiltration membrane assembly, comprises shell and filter core, and described filter core is made up of film silk and film capping, shell inner cavity is divided into by described film capping produces water cavity and the upper and lower two parts of filter chamber, described film silk is positioned at filter chamber inside, and two ends are fixed in film capping, and is communicated with product water cavity; Described shell is provided with and the product mouth of a river of producing water cavity and being communicated with, and the water inlet be communicated with filter chamber and dense water out; It is characterized in that, described dense water out is located at cover top portion, and is communicated with filter chamber by the central tube through film capping, and described water inlet is located at the bottom of shell.
2. hyperfiltration membrane assembly as claimed in claim 1, it is characterized in that, described shell is made up of end cap and body, and end cap and body are fixed by anchor ear, the joining place of end cap and body is provided with annular groove, and corresponding film capping periphery is provided with the annular protrusion matched.
3. hyperfiltration membrane assembly as claimed in claim 1, it is characterized in that, described film capping is provided with the centre bore passed through for central tube, described central tube is two-part structure, be respectively linkage section and main paragraph, its middle connecting segment connects dense water out and centre bore, and centre bore is inserted in main paragraph one end, and the other end extends in filter chamber.
4. hyperfiltration membrane assembly as claimed in claim 1, it is characterized in that, the bottom of described filter chamber is provided with water distributing plate, and water distributing plate is evenly provided with water distributing pore.
5. hyperfiltration membrane assembly as claimed in claim 4, it is characterized in that, the angle of described water distributing pore and horizontal plane is 60 ~ 90 degree.
6. hyperfiltration membrane assembly as claimed in claim 4, it is characterized in that, described central tube extends to water distributing plate place, free end end-enclosed, has dense water inlet near the region of film capping.
7. one kind utilize as arbitrary in claim 1 ~ 6 as described in the method for hyperfiltration membrane assembly process ultra, it is characterized in that, former water is passed into from water inlet, by pressurization, former water is entered in filter chamber and carry out film ultrafiltration, obtain and produce water and dense water, produce water and flow into product water cavity through film silk inner chamber, then flow out from the product mouth of a river, dense water, after central tube, flows out from dense water out.
8. method as claimed in claim 7, it is characterized in that, in controlled filter chamber, the flow velocity of water is 0.05 ~ 0.095m/s.
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| CN105060603A (en) * | 2015-07-31 | 2015-11-18 | 浙江至美环境科技有限公司 | Movable emergency water treatment apparatus based on various pollution types, and technology thereof |
| CN105060585A (en) * | 2015-07-31 | 2015-11-18 | 浙江至美环境科技有限公司 | Portable multiuse emergency drinking water treatment apparatus and treatment technology thereof |
| CN107158951A (en) * | 2017-06-02 | 2017-09-15 | 浙江沁园水处理科技有限公司 | Ultra-filtration element component |
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| CN105060585A (en) * | 2015-07-31 | 2015-11-18 | 浙江至美环境科技有限公司 | Portable multiuse emergency drinking water treatment apparatus and treatment technology thereof |
| CN105060585B (en) * | 2015-07-31 | 2017-09-08 | 浙江至美环境科技有限公司 | A kind of portable multi-purpose device for treating emergency drinking water and handling process |
| CN105060603B (en) * | 2015-07-31 | 2018-04-20 | 浙江至美环境科技有限公司 | A kind of mobile emergency water treatment facilities and its technique based on a variety of pollution types |
| CN107158951A (en) * | 2017-06-02 | 2017-09-15 | 浙江沁园水处理科技有限公司 | Ultra-filtration element component |
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| CN104587833B (en) | 2017-05-10 |
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Denomination of invention: A ultrafiltration membrane component and its method for treating high turbidity water Granted publication date: 20170510 Pledgee: Bank of Beijing Co.,Ltd. Hangzhou Yuhang sub branch Pledgor: CHIMEY ENVIRONMENT SCIENCE & TECHNNOLOGY CO.,LTD. Registration number: Y2024980007116 |