CN101254978B - Hollow fiber curtain type film assembly - Google Patents
Hollow fiber curtain type film assembly Download PDFInfo
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- CN101254978B CN101254978B CN2008101037309A CN200810103730A CN101254978B CN 101254978 B CN101254978 B CN 101254978B CN 2008101037309 A CN2008101037309 A CN 2008101037309A CN 200810103730 A CN200810103730 A CN 200810103730A CN 101254978 B CN101254978 B CN 101254978B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention discloses a hollow fiber curtain-type membrane component, which comprises a hollow fiber membrane bundle composed of a plurality of hollow fibrous membrane threads, the end head(s) at one end or the both ends of the hollow fiber membrane bundle, an air inlet pipe and a water producing pipe. The end presents a strip shape, an air distribution device with an air distribution hole is arranged at least one end, the air distribution device is communicated with the air inlet pipe, and the hole opening of the air distribution hole is opened towards the top part of the hollow membrane fiber; the end head(s) at one end or the both ends of the hollow fiber membrane bundle refers that the end head(s) is (are) provided at one end or the both ends of the hollow fiber membrane bundle. The invention also discloses a membrane bioreactor utilizing the hollow fiber membrane component and water treatment equipment. The hollow fiber membrane component disclosed by the invention has the structural characteristics that the anti pollution performance of the hollow fiber membrane component is enhanced, particularly the anti pollution performance of the root of the hollow fiber membrane is enhanced, the effective filtering areas of the hollow fibrous membrane threads are ensured, the service life of the hollow fiber membrane component is prolonged, and the processing, the assembly, the installation and the reparation of the hollow fiber membrane component are very convenient.
Description
Technical field
The present invention relates to a kind of water separating membrane treatment facility, especially relate to a kind of membrane bioreactor that is applied to the tubular fibre curtain type film assembly of water treatment and utilizes the tubular fibre curtain type film assembly, belong to water-treatment technology field.
Background technology
(Membrane Bioreactor, MBR) technology is that a kind of high-efficiency sewage with membrane separation technique and the combination of traditional biological treatment technology is handled and reuse technology to membrane bioreactor.In the MBR system, each pollutant in the sewage is mainly removed by the biochemical action of microorganism, but different with the traditional biological treatment process is, membrane module has substituted second pond thoroughly separates muddy water with its high efficiency separation effect, this makes that sludge retention time and hydraulic detention time can be separate, the accumulation of special efficacy bacterium in the increase of activated sludge concentration and the active sludge has improved biochemical reaction rate in the biochemical reaction tank.Microorganism no longer passes through gravitational settling with separating of water, but under the driving of pressure, water molecules and other small-molecule substances of part can see through film, and microorganism and macromolecular substance then tunicle are trapped in the reaction tank, thereby make system obtain good effluent quality.MBR technology has solved outstanding problems such as the ubiquitous effluent quality instability of traditional waste water treatment process, floor space are big, technology controlling and process complexity substantially, it is the water technology that has development potentiality, especially aspect reuse of wastewater, MBR technology can be processed into sanitary sewage, municipal effluent or close with it trade effluent the high quality reuse water of purposes such as can be used as city miscellaneous water, industrial circulating cooling water with settling at one go, receive academic widely the concern at present in worldwide just day by day, large-scale engineering is used and is also increased gradually.
According to the position that is provided with of membrane module, membrane bioreactor can be divided into external placed type (or claiming split type, separated type) membrane bioreactor and built-in (or claiming immerseable, integral type, immersion) membrane bioreactor two big classes.
The general multiselect of external membrane bioreactor pillar hollow fiber film assembly or tubular membrane component, be that membrane module and bio-reactor branch are arranged, mixed solution in the bio-reactor is delivered to the filter end of membrane module after the recycle pump supercharging, liquid in the mixed solution sees through film under pressure, become the system handles water outlet, solid substance, macromolecular substance etc. then tunicle are held back, and are back in the bio-reactor with concentrated solution.The characteristics of external membrane bioreactor are stable and reliable operations, be easy to film cleaning, change and set up, and membrane flux is generally bigger, but under the general condition,, prolong the cleaning interval of film for reducing the deposition of pollutent on the film surface, need provide higher face cross-flow flow velocity with recycle pump, cause the water circulation amount and the required lift of recycle pump to increase, power charge increases, and the ton water consumption is up to 2-10kWh/m
3, and the shearing force that the high speed rotating of pump produces can make the certain micro-organisms thalline produce deactivation phenomenom.
Built-in membrane bioreactor is selected curtain formula or bundle formula hollow fiber film assembly or plate and frame module mostly for use, be that membrane module is immersed in below the liquid level of bio-reactor, after former water enters membrane bioreactor, active sludge in the mixed liquid of most of pollutent wherein decomposes or transforms, again under the suction function that suction pump provides or under the effect in waterhead by the membrane filtration water outlet, aerating system is arranged on the membrane module below, necessary oxygen is provided on the one hand the microbiological degradation organism, utilize gas to put forward principle on the other hand, make the air water two-phase flow carry out sluicing, suppress the deposition of face sludge blanket with this to film outer surface.Built-in membrane bioreactor has saved the mixed solution recycle system than external membrane bioreactor, and structure is more compact, and floor space is little, and by the suction water outlet, the ton water consumption is relatively low, reduces to 1-2.4kWh/m
3, but the installation of membrane module, maintenance, cleaning are very inconvenient, and it is big to clean labour intensity, and cost is higher, and membrane flux is also less relatively.
In sum, adaptability that membrane biological reactor process is good and treatment effect are confirmed by numerous academic research and engineering practice, no matter but be external placed type or built-in membrane bioreactor, compare with comparatively sophisticated other sewage treatment process at present, cause the initial cost height owing to the membrane module cost is high; Owing to high-lift recycle pump or high-intensity aeration cause the operation energy consumption height; Cause the maintenance management complexity owing to the membrane module cleaning operation is complicated; This three big outstanding problem has limited membrane bioreactor to a great extent and has really realized industrialization.How under the prerequisite that effectively controlling diaphragm pollutes, improve membrane flux on the one hand as much as possible so as to reducing the cost of membrane module, reduce the energy consumption of recycle pump or aeration on the other hand as far as possible, develop easy, easy row, the measure of film cleaning reliably simultaneously, it is the key point that comprehensively solves aforementioned three big problems, and a large amount of research and practice confirm that the exploitation of new membrane assembly is again the key of key.So-called new membrane assembly needs the innovation on the mould material on the one hand, then needs the innovation on the membrane module structure on the other hand.
So-called membrane module be membrane element with certain area with the membrane sepn device that certain form is assembled into, be the minimum unit that film is installed in the middle of engineering is used.That the basic form of membrane element has is flat, tubular type, capillary type and tubular fibre formula, then mainly containing of being suitable in membrane bioreactor is flat, tubular type and tubular fibre formula, corresponding membrane module form is plate and frame, pillar, curtain formula or bundle formula, plate and frame module adopts flat element usually, column-type film components adopts tubular type or tubular fibre formula element usually, and curtain formula or bundle formula membrane module adopt tubular fibre formula element usually.Because engineering is actual will use the larger area film, the quantity of required membrane module is very big, therefore often need one or several membrane modules are assembled into membrane module unit with certain form, comprising membrane module, header, fixed support etc., according to the pattern of membrane module, forms such as plate and frame, pillar, curtain formula or bundle formula are arranged also.
In the middle of several membrane element forms such as flat sheet membrane, tubular membrane and hollow-fibre membrane, hollow-fibre membrane has obtained because packing density is big, cost is low using widely.The hollow fiber film assembly made from hollow fibre membrane component has curtain formula, bundle formula and three kinds of basic forms of pillar.Relevant tubular fibre curtain type film assembly can be referring to Chinese patent and patent application 00102210.5,01820629.8,03803307.0,200410098416.8,200420029295.7,200510013293.8,200510015570.9,200510116589.2,200520123501.5,200610104225.7.Relevant hollow fiber bundle formula membrane module can be referring to Chinese patent and patent application 02158708.6,02158711.6,03822704.5,200420029337.7,200420109650.1,200510049324.5,200580025651.5,200610065807.9,200620039621.1,200710056641.9.Relevant tubular fibre pillar membrane module can be referring to Chinese patent and patent application 99800749.8,01229169.2,01229790.9,03121949.7,200310100565.9,200420056864.7,200420056865.1,200480028264.2,200510015346.X and 200520027729.4,200610129352.2.Above-mentioned problem of the equal ubiquity of these tubular fibre curtain type film assemblies: hollow-fibre membrane silk root deposition phenomenon is serious, and in case form deposition and be not easy very much clear again, reduced like this membrane module filter useful area and filtering homogeneity, the continuation that film silk root film pollutes develops and spreads and can further aggravate the forfeiture of filtering ununiformity and effective filtration area, finally shortens the work-ing life of whole membrane module.
The tubular fibre curtain type film assembly is compared with the pillar hollow fiber film assembly with the bundle formula, and the packing density of the membrane module unit of its composition can do more, and the level of automation of the potting operation in its process of manufacture can be higher.Tubular fibre curtain type film assembly in the market is provided with boring aeration pipe in the major measure of taking aspect the pollution of inhibition film under membrane module, as shown in figure 11, by the formed air water two-phase flow of high strength aeration hollow fiber membrane bundle is carried out sluicing, though can reduce the pollution at hollow fiber membrane bundle middle part to a certain extent, but the flow turbulence of hollow fiber membrane bundle root is still very poor, film silk root deposition phenomenon is comparatively serious, especially when hollow fiber membrane bundle is vertically placed, because the air water two-phase flow is stopped by the lower end of hollow fiber membrane bundle in uphill process, therefore, the deposition phenomenon is even more serious on the lower end casting end face.The operation energy consumption that increases the membrane bioreactor of this tubular fibre curtain type film assembly of the not only feasible employing of aeration rate further obviously exceeds other sewage biochemical processing process, and film silk root deposition phenomenon still can not get effective solution.
Summary of the invention
An object of the present invention is to provide a kind of tubular fibre curtain type film assembly, in water treatment procedure, can effectively avoid the deposition of hollow-fibre membrane root.
Another object of the present invention provides a kind of membrane bioreactor that utilizes the tubular fibre curtain type film assembly of this invention.
A further object of the invention provides a kind of water treating equipment that utilize the tubular fibre curtain type film assembly of this invention or utilize membrane bioreactor of the present invention.
In order to realize the foregoing invention purpose, the present invention adopts following technical scheme:
A kind of tubular fibre curtain type film assembly, comprise the hollow fiber membrane bundle of forming by many hollow-fibre membrane silks, termination, inlet pipe and the water producing pipe of hollow fiber membrane bundle one or both ends, described termination is a long strip shape, the distribution device that the band qi-emitting hole is arranged at least one termination, this distribution device is communicated with inlet pipe, and the aperture of described qi-emitting hole is towards the root of hollow-fibre membrane silk; The termination of described hollow fiber membrane bundle one or both ends refers to, and an end of hollow fiber membrane bundle has termination or two ends that the termination is all arranged.
Preferably, can be towards horizontal direction or tiltedly descends direction in the aperture of described qi-emitting hole.
Preferably, the end face of described termination is the end face of projection, and the position of described qi-emitting hole was near the bottom of the end face of described projection when hollow fiber film assembly was vertically placed, and the aperture of described qi-emitting hole is towards the top of the end face of described projection.
Preferably, be trapezoidal perpendicular to the transverse section of the bossing of the described termination of the length direction of termination, isosceles trapezoid more preferably.
Preferably, the ratio of the length of described termination and width is 2-100, is preferably 10-50.
Preferably, a housing is arranged outside hollow fiber membrane bundle.
Preferably, described housing and described termination link together by dismountable structure.
The present invention also provides a kind of membrane bioreactor that utilizes above-mentioned tubular fibre curtain type film assembly.
The present invention also provides a kind of water treating equipment that utilize above-mentioned tubular fibre curtain type film assembly or membrane bioreactor.
Below technique scheme is explained in detail and illustrates, and be explained in detail and illustrate for the ins and outs that other relate to:
For the convenience of narrating, among the present invention, the hollow-fibre membrane silk is also referred to as the film silk, and hollow fiber membrane bundle is also referred to as the film bundle.
In the tubular fibre curtain type film assembly, the hollow-fibre membrane silk can be arranged with in-line by single or multiple lift, and film silk root sealed knot is within the termination.Among the present invention, the length direction of termination refers to the direction that film silk in-line is arranged, the width of termination refer to vertical with length direction and with the vertical direction of film silk direction.
The distribution device that the band qi-emitting hole is arranged at least one termination, this distribution device is communicated with inlet pipe, described qi-emitting hole can be arranged along the length direction of described termination, and the aperture is towards the root of hollow-fibre membrane silk, and this is more thorough for washing away of hollow-fibre membrane silk root.The packing density of hollow-fibre membrane silk in membrane module is very big, usually can be up to 300-1200m
2/ m
3(metre squared per cubic), under high like this packing density, film silk root is easy to produce the deposition phenomenon, and in case forms deposition and be not easy very much again to remove.Distribution device provided by the invention is arranged at the root of hollow-fibre membrane silk, and the aperture of qi-emitting hole towards the root of hollow-fibre membrane silk rather than directly up, therefore the air-flow that comes out from qi-emitting hole is not direct rising, but at first wash away the root of hollow-fibre membrane silk, significantly improved the flow turbulence of film silk root, make the solid substance in the liquid to be filtered be not easy deposition and stop, thereby avoid the alluvial of mud at hollow-fibre membrane silk root.
The aperture of the qi-emitting hole of described distribution device is towards level, vertically up, vertically down, obliquely and oblique inferior multiple choices can be arranged.The end face of described termination can be the end face of plane, depression or the end face of projection, and as preferably, the end face of described termination is the end face of plane or projection, and as more preferably, the end face of described termination is the end face of projection.The characteristics of bulge-structure are low around high in the middle of being, can form like this one by the centre to around an inclination, this structure helps helping reducing the alluvial of mud around air-flow blows to pollutents such as mud.When the end face of termination is the plane, can be towards horizontal direction or tiltedly descends direction in the aperture of preferred qi-emitting hole; When the end face of termination was the end face of projection, the aperture of preferred qi-emitting hole was towards can be for obliquely towards the direction at the top of projection.When the end face of termination is the plane, for the root of film bundle, if the aperture of qi-emitting hole towards vertically up or oblique upper to, air flow line is parallel to film silk surface generally, the scouring force that film silk root is produced is little; If the aperture of qi-emitting hole towards horizontal direction, from the air flow line that wherein comes out then perpendicular to film silk surface, the scouring force that produced when last with respect to the aperture increases greatly, and also has the part air-flow to move towards the below, helps washing away film silk root; If the aperture of qi-emitting hole is towards tiltedly descending direction, the air flow line that comes out is sideling towards the end face of termination, air-flow can preferentially move downward, also increased washing away to film silk root, and air-flow can continue rising after the washing away of intact pair of films silk root, the air water two-phase flow that forms continues as other positions of hollow-fibre membrane silk provides surperficial cross-flow, and clearly, such scouring effect is better than the vertically scouring effect and obliquely time of aperture up.When the end face of termination is the end face of projection, if the aperture of qi-emitting hole is obliquely towards the direction at the top of projection, the air-flow that comes out from qi-emitting hole neither directly rise, but the sidewall that is parallel to projection spreads obliquely, to directly sweep away the root of hollow-fibre membrane silk along journey, also have good scouring effect for film silk root like this.When the sidewall of distribution device has certain thickness, can utilize the thickness of distribution device that the aperture of qi-emitting hole is designed in the process of processing, make the air flow line that comes out from qi-emitting hole be horizontal direction, sideling towards down or sideling towards last direction.
The shape of described qi-emitting hole, quantity, size and distribution form have various ways.Shape can adopt circle or long strip shape, is linear uniform distribution along the long limit of described termination, and when being bar hole, the long limit in each hole should be roughly parallel to the long limit of described termination.The distance that the aperture of described qi-emitting hole exceeds contiguous casting end face can equate, also can be unequal, and this distance range can be 0mm (millimeter)-10mm, preferred distance equates, is 1mm-5mm.The aperture of described qi-emitting hole can equate with vertical range between the contiguous end face edge, also can be unequal, and this distance range can be 0mm-10mm, preferred distance equates, is 1mm-5mm.The diameter of described qi-emitting hole or the length of minor face can be 1mm-10mm, preferred 1mm-5mm.
The shape of described projection can be pyramid or other the known arbitrary shape that reams the tip.As preferably, described projection is that arbitrary transverse section is trapezoid terrace with edge shape on the length direction of termination, more preferably is the terrace with edge of isosceles trapezoid.
The length on the long limit of the bottom surface of described terrace with edge shape projection is than the little 1mm-200mm of length of described termination, preferred 10mm-100mm; The length of the minor face of the bottom surface of described terrace with edge shape projection is than the little 1mm-60mm of width of described termination, preferred 10mm-40mm.The length on the long limit of the end face of described terrace with edge shape projection is than the little 0mm-40mm in long limit of bottom surface, preferred 0mm-20mm; The length of the minor face of the end face of described terrace with edge shape projection is than the little 1mm-60mm of minor face of bottom surface, preferred 5mm-20mm.The bottom surface of described terrace with edge shape projection and the distance between the end face, promptly Tu Qi altitude range is 2mm-150mm, preferred 5mm-50mm; The ratio range of the minor face of the bottom surface of described terrace with edge shape projection and its height is 0.5-20, is preferably 1-10, more preferably 2-5.Angle between described terrace with edge side and the bottom surface can be 5 °-85 °, preferred 15 °-75 °.Plane and planar corner dimension are determined in the following manner: (1) if two planes do not have intersection, then two planar angles are 0 °; (2) if there is intersection on two planes, then along the intersection direction with on three planes of two plane projections to the, form an acute angle, the angle of this acute angle is exactly described two planar angles.
Described termination can be long strip shape, and the size range of length direction is 0.1m (rice)-3m, preferred 0.2m-1m; The size range of width is 5mm-100mm, preferred 10mm-40mm; The scope of length and width ratio is 2-100, preferred 10-50.The hollow-fibre membrane silk can be arranged with in-line by individual layer or multilayer like this, and the tubular fibre curtain type film assembly is formed in its root casting sealed knot back within the termination of long strip shape.
Described hollow-fibre membrane silk can have and only have end casting sealed knot to be provided with within the termination of producing the water collecting chamber in one, and the other end can freely swing, and adopt known any way to make closed pore state, for example by using the resin adhesive liquid sealing, resin can select for use thermoplastic resin also can select thermosetting resin for use, the preferred thermosetting resin that uses, thermosetting resin can be selected Resins, epoxy for use, unsaturated polyester resin, resinous type such as acrylic resin, thermosetting resin preferably uses flexible resin, flexible-epoxy for example, select for use flexible resin-sealed can so that the hollow-fibre membrane silk in the process of distortion, a well buffering is arranged, be unlikely brittle rupture.Also can cast sealed knot respectively within two terminations in two ends, and have at least an inside should be provided with product water collecting chamber in two terminations.Be provided with the outside, termination of producing the water collecting chamber and should be provided with water producing pipe, producing the water collecting chamber should be connected with water producing pipe.Cast sealed knot when being provided with within the termination of producing the water collecting chamber for one when described hollow-fibre membrane silk has and only have an end, and during its work, this termination can be the top at hollow fiber membrane bundle, also can be the bottom at hollow fiber membrane bundle.During preferred use work, the termination is in the hollow fiber film assembly of hollow fiber membrane bundle bottom, can avoid when film silk lower end freely swings film silk that the rising because of the air water two-phase flow occurs the easily problem of winding mutually like this.
Among the present invention, upper end generally refers to membrane module in the water treatment working process, and near the termination of the water surface, lower end refers near water-bed termination; In engineering reality, membrane module also may be a horizontal positioned, this moment, the termination did not then have branch up and down up and down, if those skilled in the art are according to the practical situation needs, setting is put upside down in the termination up and down, the perhaps modification of other simple set-up mode so also is construed as and is utilizing technical scheme of the present invention.Upper end and lower end can exist simultaneously, also can have and only have one.
All cast sealed knot within the termination time when the hollow fiber membrane bundle two ends, and the shape of described upper end and lower end can be identical, also can be different.
Above-mentioned arbitrary tubular fibre curtain type film assembly, when sealed knot is all cast within the termination time in the hollow fiber membrane bundle two ends, the distribution device of band qi-emitting hole can all be set, and these two distribution devices are communicated with by a hollow tube on the casting end face of two terminations.Hollow tube can couple together two terminations up and down, and the length of flexible pipe is slightly less than the length of hollow-fibre membrane silk, and the pulling force when playing the gravity of bearing lower end and swing is broken to avoid hollow-fibre membrane silk load.In addition, hollow tube can also be supplied with up and down two distribution devices with air-flow, make hollow fiber membrane bundle up and down the root at two ends can directly be purged by aeration gas flow and wash away, to prevent film silk root generation deposition.
In the described termination one or two can be provided with inlet pipe.Inlet pipe and water producing pipe be can be provided with simultaneously in described arbitrary termination, inlet pipe or water producing pipe perhaps only are provided with.The quantity of water producing pipe or inlet pipe can be selected according to the engineering practical situation, an inlet pipe or a water producing pipe both can have been selected, also can select two or more inlet pipe, perhaps select two or more water producing pipes, perhaps select two or more inlet pipe and water producing pipe simultaneously.Described inlet pipe and water producing pipe can be inflexible, also can be flexible, preferred flexible, its material can be silicon rubber, viton, soft PVC, urethane etc.The diameter range of described inlet pipe, water producing pipe is 1mm-50mm, preferred 5mm-20mm.
Above-mentioned arbitrary tubular fibre curtain type film assembly can be provided with a housing outside hollow fiber membrane bundle.The effect of housing is the effect that the air water two-phase flow that aeration forms is had a constraint, make it be unlikely to diffuse to the housing periphery, thereby significantly dwindled gas and put off face, just make under the situation of less aeration rate and can obtain higher aeration intensity in that hollow-fibre membrane is intrafascicular, make the air water two-phase flow have better sluicing effect to film silk outside surface, can suppress the development that film pollutes well, and remarkable save aeration consumption.
Can there be hole on the sidewall of described housing, also can some hole, but that hole is provided with is unsuitable too many, and hole area also should not be too big, especially on the same horizontal plane or on the same axis in housing sidewall.As preferably, do not establish any hole on the sidewall of described housing.
The transverse section of described housing can be rectangle, square or other known arbitrary shapes.As preferably, the transverse section of described housing is an elongated rectangular shape.The area in each transverse section can be identical from top to bottom for described housing, also can be inequality.As preferably, the described housing area in each transverse section from top to bottom is identical, and perhaps the cross sectional area of middle portion is slightly less than the cross sectional area at two ends up and down.The length range of described housing is 0.1m-4.0m.As preferably, the length range of described housing is 1.5m-2.0m.The length on the long limit of described housing is than the big 10mm-200mm of length of described termination, preferred 20mm-100mm; The length of the minor face of described housing is than the big 5mm-60mm of width of described termination, preferred 10mm-40mm.
Described termination can be in the inside of housing, also can be in the outside of housing.Preferably, described termination is fully in enclosure interior, and the termination is the 1/20-1/3 of shell length with the distance of the housing port of vicinity.The percentage ratio that the perforated area of housing port on the transverse section accounts for the port cross sectional area should be preferably greater than 80% greater than 10%; The area of not filled by termination or hollow-fibre membrane silk on the arbitrary transverse section of enclosure interior accounts for the per-cent of the transverse section total area should be greater than 10%, be preferably greater than 50%, can guarantee like this when membrane module is worked, liquid to be filtered can enter enclosure interior from the lower port of housing, upper port from housing flows out housing at last, and enclosure interior liquid stream is mobile comparatively unimpeded.
Described housing and described termination link together by dismountable structure, so both can guarantee that hollow fiber membrane bundle was housed in enclosure interior all the time fully in the membrane module working process, housing can rock along with rocking of termination, all the time do not separate with it, simultaneously make the termination to disassemble again with housing, this makes hollow fiber membrane bundle and housing separately to change, and has improved the utilization ratio of material to a certain extent.
Above-mentioned tubular fibre curtain type film assembly can adopt known arbitrary mode to link to each other with stationary installation by arbitrary position of termination, housing.As preferably, the upper port of described housing links to each other with stationary installation by dismountable hardwired modes such as socket joint, screw thread, loose joints, and perhaps the mode that is flexible coupling by soft rope or metal hose etc. links to each other with stationary installation.Soft rope can be corrosion resistant rope, steel wire or spring etc.Soft rope makes membrane module be in overhang in liquid to be filtered, can swing be arranged with current.When inlet pipe or water producing pipe are metal hose, also can membrane module be suspended on the stationary installation by inlet pipe or water producing pipe.
Above-mentioned tubular fibre curtain type film assembly, described inlet pipe and water producing pipe can be in the inside of housing, and an end that is connected with the pipeline that catchments of an end that is connected with source of the gas of inlet pipe and water producing pipe stretches to the outside of housing from the top of housing.Such setting can make things convenient for the installation and removal of hollow fiber film assembly like this so that hollow fiber film assembly only is connected with stationary installation by its upper end.When membrane module is worked, only its upper end is connected with stationary installation, and the water outlet of the inlet mouth of inlet pipe and water producing pipe is positioned at the top of housing, even if this moment, whole of membrane module was surrounded by liquid to be filtered, but, needn't reduce water level when membrane module need overhaul like this or will water level not fall to such an extent that very lowly just it can be disassembled because the tie point of membrane module and stationary installation is positioned near the water surface or the position more than the water surface.
Described hollow-fibre membrane silk is a kind of tubular fibre that has micropore, and the material of making the hollow-fibre membrane silk can be selected from materials such as polyvinylidene difluoride (PVDF), polyethylene, polypropylene, polyethersulfone.At first by using casting resins such as Resins, epoxy, urethane to carry out the end-blocking casting, re-use flexible resins such as silicon rubber, urethane carries out second casting to hollow-fibre membrane silk root to the hollow-fibre membrane silk, to reduce the probability of film silk root fracture.As preferably, the material of described hollow-fibre membrane silk is a polyvinylidene difluoride (PVDF).The average membrane pore size of described hollow-fibre membrane silk is 0.01 μ m (micron)-5 μ m.
Described hollow fiber membrane bundle is made up of 10-1000 root hollow-fibre membrane silk, and length range is 0.1m-3.0m.Preferably be made up of 50-500 root hollow-fibre membrane silk, length range is 1.0m-2.0m.
When sealed knot is all cast within the termination time in the hollow fiber membrane bundle two ends, the length of described hollow fiber membrane bundle can and up and down the distance between two terminations equate, also can be slightly larger than this distance.As preferably, the length of described hollow fiber membrane bundle is greater than the distance between two terminations up and down, but less than the length of housing.
The membrane bioreactor that utilizes above-mentioned tubular fibre curtain type film assembly is that the method by the routine of prior art assembles manufacturing.
Utilizing the water treating equipment of above-mentioned tubular fibre curtain type film assembly or above-mentioned membrane bioreactor, is that the ordinary method by prior art assembles manufacturing.
The present invention compared with prior art has following useful effect:
Improved the antifouling property of hollow fiber film assembly, the antifouling property of hollow fiber membrane bundle root has especially prolonged work-ing life of hollow fiber film assembly.The qi-emitting hole aperture of the distribution device that the hollow fiber membrane bundle end is provided with is towards hollow-fibre membrane silk root, the fluids such as gas that come out from qi-emitting hole can preferentially wash away the root of hollow-fibre membrane silk, therefore the big root film silk of packing density is too intensive, the universal phenomenon of easy deposition because of pursuing well to have avoided existing hollow fiber film assembly, remain filtering useful area of hollow-fibre membrane silk and filtering homogeneity in the water treatment procedure, can effectively prevent the fast development of polluting and spread the work-ing life that shortens whole bundle film silk because of film silk root film.
In addition, hollow fiber membrane bundle is in overhang in liquid to be filtered, the setting of the various parts that are flexible coupling, be soft pipe connecting, inlet pipe, water producing pipe etc., make that the film bundle can be along with termination swing together within the specific limits, film silk root significantly reduces with the angle of oscillation of casting end face, pulling force between film silk root and the casting end face also reduces greatly, therefore greatly reduce the probability of film silk root fracture, improved the stability of membrane module work, prolonged its work-ing life.
And improved the comfort level of hollow fiber film assembly processing, assembling, installation and maintenance.The termination internal structure of membrane module of the present invention casting hollow-fibre membrane silk is simple, and interior do not have a complicated structural part, has reduced the difficulty and the scrap rate of potting operation, and membrane module integral body can realize prefabricated structure, and product is realized assembling fast easily.Be fixed in stationary installation in the mode that flexibly connects, every membrane module can mount and dismount separately, and singlely can finish whole operations, must carry out integral hoisting by lifting rig after forming large-scale membrane module unit unlike existing hollow fiber film assembly, labour intensity is big, single can't the operation.When inlet pipe or water producing pipe by flexibility are suspended on the stationary installation membrane module, and when two termination intermediary pipe connectings also are metal hose, requirement to membrane module upper space height during the installation and removal membrane module also can reduce greatly, therefore made things convenient for the installation and the maintenance of hollow fiber film assembly to a great extent, made hollow fiber film assembly excellent adaptability all arranged the types of applications occasion.
Description of drawings
Fig. 1 is the longitudinal diagram of embodiments of the invention 1 described tubular fibre curtain type film assembly.
Fig. 2 is the longitudinal diagram of embodiments of the invention 2 described tubular fibre curtain type film assemblies.
Fig. 3 is the sectional view at the A-A place among Fig. 1.
Fig. 4 is the sectional view at the A-A place among Fig. 2.
Fig. 5 is the sectional view at the B-B place among Fig. 1.
Fig. 6 is the sectional view at the B-B place among Fig. 2.
Fig. 7 is the synoptic diagram of the membrane module unit be made up of several tubular fibre curtain type film assemblies of the present invention among the embodiment 1.
Fig. 8 is the synoptic diagram of the membrane module unit be made up of several tubular fibre curtain type film assemblies of the present invention among the embodiment 2.
Fig. 9 is in the embodiments of the invention 1, and air-flow is the partial enlarged drawing of lower end among Fig. 5 to the synoptic diagram that hollow-fibre membrane silk root purges, and the figure middle shell does not show.
Figure 10 is in the embodiments of the invention 2, and air-flow is the partial enlarged drawing of lower end among Fig. 6 to the synoptic diagram that hollow-fibre membrane silk root purges, and the figure middle shell does not show.
Figure 11 is in a kind of tubular fibre curtain type film assembly of prior art, and the synoptic diagram that air-flow purges the hollow-fibre membrane silk is the sectional view by lower end surface center vertical line.
Figure 12 is the length direction and the width synoptic diagram of the termination of tubular fibre curtain type film assembly.
Figure 13 is the length direction of termination of another hollow fiber film assembly and the synoptic diagram of width.
The explanation of each mark in the accompanying drawing:
The 1--housing; 2--hollow-fibre membrane silk; The 3--hollow fiber membrane bundle; The 4--upper end;
The 5--lower end; The 6--water producing pipe; The 7--inlet pipe; 8--produces the water pipe connecting;
The 9--inlet pipe connection; 10--produces the water collecting chamber; The distribution device of 11--band qi-emitting hole;
The 12--qi-emitting hole; The soft rope of 13--; The 14--quick connector; 15--produces aquaporin;
The 16--threeway; The 17--aeration tube.
Embodiment
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in further detail.
Embodiment:
As Fig. 1; Fig. 3; shown in Figure 5; a kind of tubular fibre curtain type film assembly; comprise long 600mm; wide 60mm; material is the housing 1 of UPVC (un-plasticized polyvinyl chloride) plastics; the hollow fiber membrane bundle of forming by 498 hollow-fibre membrane silks 23 that is arranged in the housing 1 and vertically places; the mean pore size that is used for the micropore by liquid of hollow-fibre membrane silk 2 is 0.4 μ m; the external diameter of hollow-fibre membrane silk 2 is 2.8mm; material is a polyvinylidene difluoride (PVDF); two ends come together among upper end 4 and the lower end 5 with the Resins, epoxy casting; and with urethane it is carried out second casting, so that film silk root is protected.The monnolithic case of upper end 4 and lower end 5 is elongated rectangular shape, and length is 585mm, and width is 30mm.Upper end 4 and lower end 5 inside are equipped with produces water collecting chamber 10, the two ends of hollow-fibre membrane silk 2 are the perforate state in the product water collecting chamber 10 in upper end 4 and lower end 5 respectively, the product water pipe connecting 8 that product water collecting chamber 10 in upper end 4 and the lower end 5 is Φ 12mm by two external diameters is connected, be provided with the water producing pipe 6 that external diameter is Φ 12mm in upper end 4 outsides, water producing pipe 6 is connected by quick connector 14 with upper end 4, and its inner chamber is connected by producing aquaporin 15 and upper end 4 interior product water collecting chambers 10.Upper end 4 is connected with housing 1 by soft rope 13 respectively with lower end 5.Upper end 4 and lower end 5 are provided with the distribution device 11 of band qi-emitting hole, the inlet pipe connection 9 that the distribution device 11 of upper end 4 and lower end 5 is Φ 12mm by two external diameters is connected, be provided with the inlet pipe 7 that external diameter is Φ 12mm in upper end 4 outsides, inlet pipe 7 is connected by quick connector 14 with upper end 4, the intracavity inter-connection of the distribution device 11 of its inner chamber and upper end 4.Water producing pipe 6, inlet pipe 7, product water pipe connecting 8 and inlet pipe connection 9 are the hollow plastic flexible pipe.
The casting end face of upper end 4 and lower end 5 is the plane, and profile is an elongated rectangular shape, and length is 500mm, and width is 20mm.Upper end 4 and lower end 5 are producing the distribution device 11 that is equipped with the band qi-emitting hole outside the water collecting chamber 10, and produce water collecting chamber 10 and just be embedded within the distribution device 11 intermediary grooves, but isolated each other between the cavity of product water collecting chamber 10 and distribution device 11.The sidewall of the distribution device 11 of band qi-emitting hole exceeds casting end face 4mm, exceed the inboard of the part of casting end face in the both sides top side wall, the length direction of in height middle position and edge casting end face evenly is provided with the circular qi-emitting hole 11 that 99 diameters are 2mm, width between centers in the same row between per two qi-emitting holes 11 is 5mm, qi-emitting hole 11 is a columniform passage to the distribution device 10 inner parts of extending and being connected with its cavity, and the central axis of this cylindrical channel is parallel to the casting end face.
The height of housing 1 is 1.26m, the mean length of hollow fiber membrane bundle 3 is 1.15m, the total height of upper end 4 and lower end 5 is 50mm, the distance of upper end 4 upper limbs apart from housing 1 upper port and lower end 5 lower edges apart from housing 1 lower port is 30mm, and two are produced water pipe connecting 8 and inlet pipe connection 9 is 1.1m together with the total length of the quick connector 14 at two ends separately.The length of water producing pipe 6 and inlet pipe 7 is 300mm.
The synoptic diagram of the membrane module unit that Fig. 7 is made up of several tubular fibre curtain type film assemblies.During the work of this membrane module unit, the water producing pipe 6 of each tubular fibre curtain type film assembly is connected in parallel to an exit branch that is positioned at the membrane module top, and inlet pipe 7 is connected in parallel to an aeration arm that is positioned at the membrane module top.Exit branch and one can provide the water absorption tube of the water pump of negative pressure to be connected, water to be clean enters film silk inside through the micropore on hollow-fibre membrane silk 2 walls, and conflux respectively into the product water collecting chamber 10 in upper end 4 and the lower end 5, wherein the water in the product water collecting chamber 10 in the lower end 5 confluxes in the product water collecting chamber 10 in the upper end 4 through producing water pipe connecting 8, water after confluxing flows into exit branch through water producing pipe 6 again, extracts the filtration water outlet that forms membrane module out by water pump at last.The aeration arm is connected with a source of the gas, the pressurized air that source of the gas provides enters inlet pipe 7 through the aeration arm, enter through inlet pipe 7 within the cavity of distribution device 11 of band qi-emitting hole of upper end 4, the portion of air directly qi-emitting hole 12 from the distribution device 11 of upper end 4 diffuses out, directly purge near the film silk root of upper end 4 casting end faces, another part air then enters the cavity of distribution device 11 of the band qi-emitting hole of lower end 5 by inlet pipe connection 9, qi-emitting hole 12 from the distribution device 11 of lower end 5 diffuses out at last, directly purges near the film silk root the lower end 5 casting end faces.
The termination of curved shape can also be adopted in termination among the embodiment 1, and for the termination of elongated rectangular shape or the termination of curved shape, concrete length direction and width are seen Figure 12 and Figure 13.
As Fig. 2, Fig. 4, shown in Figure 6, a kind of tubular fibre curtain type film assembly, comprise that long 600mm, wide 60mm, material are the housing 1 of UPVC plastics, the hollow fiber membrane bundle of forming by 398 hollow-fibre membrane silks 23 that is arranged in the housing 1 and vertically places, the mean pore size that is used for the micropore by liquid of hollow-fibre membrane silk 2 is 0.4 μ m, the external diameter of hollow-fibre membrane silk is 2.8mm, and material is a polyvinylidene difluoride (PVDF).Hollow fiber membrane bundle 3 upper ends can freely swing, and every film silk all is closed pore state, utilizes the flexible-epoxy sealed knot, and the lower end comes together among the lower end 5 with the Resins, epoxy casting, and with urethane it are carried out second casting, so that film silk root is protected.The monnolithic case of lower end 5 is an elongated rectangular shape, and length is 585mm, and width is 30mm.Lower end 5 inside are provided with produces water collecting chamber 10, is the perforate state in the product water collecting chamber 10 of the lower end of hollow-fibre membrane silk 2 in lower end 5.External diameter is that the water producing pipe 6 of Φ 12mm puts in housing 1 inside from housing 1 upper port, be divided into the arm that two external diameters are Φ 12mm by the threeway of a T shape, two arms all are connected with lower end 5 by quick connector 14, and the product water collecting chamber 10 in its inner chamber and the lower end 5 is connected.External diameter is that the inlet pipe 7 of Φ 12mm puts in housing 1 inside from housing 1 upper port, tell the arm that two external diameters are Φ 12mm by the threeway of a T shape, two arms all are connected with lower end 5 by quick connector 14, and the intracavity inter-connection of the distribution device 11 of the band qi-emitting hole of its inner chamber and lower end 5.Water producing pipe 6 and arm thereof, inlet pipe 7 and arm thereof are the hollow plastic flexible pipe.
The casting end face of lower end 5 is the rectangular terrace with edge shape of projection, along being identical isosceles trapezoid perpendicular to arbitrary transverse section on the length direction of termination, the length on long limit, terrace with edge bottom surface is 500mm, the length of bottom surface minor face is 20mm, the length on the long limit of end face is 500mm, the length of end face minor face is 3mm, and the height between end face and the bottom surface is 15mm.Lower end 5 is producing the distribution device 11 that is provided with the band qi-emitting hole outside the water collecting chamber 10, and produce water collecting chamber 10 and just be embedded within the distribution device 11 intermediary grooves, but isolated each other between the cavity of product water collecting chamber 10 and distribution device 11.The sidewall of the distribution device 11 of band qi-emitting hole exceeds casting end face 4mm, exceed the inboard of the part of casting end face in the both sides top side wall, in height middle position also evenly is provided with the circular qi-emitting hole 11 that 99 diameters are 2.88mm along the long limit of terrace with edge bottom surface, width between centers in the same row between per two qi-emitting holes 11 is 5mm, qi-emitting hole 11 is a columniform passage to the distribution device 10 inner parts of extending and being connected with its cavity, the diameter of this cylindrical channel is 1mm, and its central shaft line parallel is in the sidewall inclined-plane of terrace with edge shape projection.
The height of housing 1 is 1.6m, the mean length of hollow fiber membrane bundle 3 is 1.45m, the total height of lower end 5 is 50mm, lower end 5 lower edges are 30mm apart from the distance of housing 1 lower port, the vertical height of water producing pipe 6 and arm thereof, inlet pipe 7 and the part of arm in housing 1 thereof is 1.52m, and the length of the part outside housing 1 is 300mm.
The synoptic diagram of the membrane module unit that Fig. 8 is made up of several tubular fibre curtain type film assemblies, different with Fig. 7 is each membrane module is shared big housing 1 is not separated by housing between the membrane module fully.During the work of this membrane module unit, the water producing pipe 6 of each tubular fibre curtain type film assembly is connected in parallel to an exit branch that is positioned at the membrane module top, and inlet pipe 7 is connected in parallel to an aeration arm that is positioned at the membrane module top.Exit branch and one can provide the water absorption tube of the water pump of negative pressure to be connected, water to be clean enters film silk inside through the micropore on hollow-fibre membrane silk 2 walls, and conflux respectively into the product water collecting chamber 10 in the lower end 5, two arms through water producing pipe 6 conflux into water producing pipe 6 back inflow exit branch again, extract the filtration water outlet that forms membrane module out by water pump at last.The aeration arm is connected with a source of the gas, the pressurized air that source of the gas provides enters inlet pipe 7 through the aeration arm, enter through two arms of inlet pipe 7 within the cavity of distribution device 11 of band qi-emitting hole of lower end 5, direct qi-emitting hole 12 from the distribution device 11 of lower end 5 diffuses out, the inclined-plane of both sides sidewall that is parallel to the terrace with edge shape projection of lower end 5 moves obliquely, directly purges film silk root along journey.
More than hollow fiber film assembly provided by the present invention is described in detail.Used specific embodiment in this specification sheets principle of the present invention and embodiment have been set forth, for one of ordinary skill in the art, according to the thought of the present invention part that may in implementation process, can change in specific embodiments and applications.Therefore, the content of this specification sheets record should not be construed as limitation of the present invention.
Claims (10)
1. tubular fibre curtain type film assembly, comprise the hollow fiber membrane bundle of forming by many hollow-fibre membrane silks (2) (3), termination (4 and/or 5), inlet pipe (7) and the water producing pipe (6) of hollow fiber membrane bundle one or both ends, it is characterized in that, described termination is a long strip shape, the distribution device that the band qi-emitting hole is arranged at least one termination, this distribution device is communicated with inlet pipe, and the aperture of described qi-emitting hole is towards the root of hollow-fibre membrane silk; The termination of described hollow fiber membrane bundle one or both ends refers to, and an end of hollow fiber membrane bundle has termination or two ends that the termination is all arranged.
2. tubular fibre curtain type film assembly according to claim 1 is characterized in that, the aperture of described qi-emitting hole is towards horizontal direction or tiltedly descend direction.
3. tubular fibre curtain type film assembly according to claim 1, it is characterized in that, the end face of described termination is the end face of projection, the position of described qi-emitting hole was near the bottom of the end face of described projection when hollow fiber film assembly was vertically placed, and the aperture of described qi-emitting hole is towards the top of the end face of described projection.
4. tubular fibre curtain type film assembly according to claim 3 is characterized in that, is trapezoidal perpendicular to the transverse section of the bossing of the described termination of the length direction of termination.
5. tubular fibre curtain type film assembly according to claim 4 is characterized in that, described trapezoidal be isosceles trapezoid.
6. tubular fibre curtain type film assembly according to claim 1 is characterized in that, the ratio of the length of described termination and width is 2-100.
7. according to any described tubular fibre curtain type film assembly of claim 1-6, it is characterized in that a housing (1) is arranged outside hollow fiber membrane bundle.
8. tubular fibre curtain type film assembly according to claim 7 is characterized in that, described housing and described termination link together by dismountable structure.
9. utilize the membrane bioreactor of any described tubular fibre curtain type film assembly of claim 1-8.
10. utilize the water treating equipment of any described tubular fibre curtain type film assembly of claim 1-8 or the described membrane bioreactor of claim 9.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101037309A CN101254978B (en) | 2008-04-10 | 2008-04-10 | Hollow fiber curtain type film assembly |
| EP08862434.1A EP2226115B1 (en) | 2007-12-14 | 2008-12-12 | A hollow fiber membrane module |
| US12/745,657 US9434629B2 (en) | 2007-12-14 | 2008-12-12 | Membrane module and membrane bioreactor, water treatment equipment using the same |
| PCT/CN2008/073485 WO2009076911A1 (en) | 2007-12-14 | 2008-12-12 | A hollow fiber membrane module, a membrane biological reactor and a water-processing equipment use of it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101037309A CN101254978B (en) | 2008-04-10 | 2008-04-10 | Hollow fiber curtain type film assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101254978A CN101254978A (en) | 2008-09-03 |
| CN101254978B true CN101254978B (en) | 2010-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101037309A Active CN101254978B (en) | 2007-12-14 | 2008-04-10 | Hollow fiber curtain type film assembly |
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| CN (1) | CN101254978B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9434629B2 (en) | 2007-12-14 | 2016-09-06 | Beijing Ecojoy Water Technology Co., Ltd. | Membrane module and membrane bioreactor, water treatment equipment using the same |
| CN101955253A (en) * | 2009-12-24 | 2011-01-26 | 北京碧水源科技股份有限公司 | Pulse cross-flow type membrane bioreactor |
| CN103071406B (en) * | 2013-01-29 | 2015-09-23 | 沁园集团股份有限公司 | A kind of anti-pollution doughnut curtain type membrane element of high packed density |
| CN103495344B (en) * | 2013-09-23 | 2016-09-14 | 杭州天创环境科技股份有限公司 | A kind of method for packing of hollow fiber curtain type membrane component |
| CN104437092B (en) * | 2014-11-04 | 2016-08-24 | 北京汉青天朗水处理科技有限公司 | A kind of water process membrane separation plant |
| CN105107387B (en) * | 2015-08-28 | 2017-12-15 | 天津华清健坤膜科技有限公司 | A kind of multilayer casting method of hollow fiber column type film |
| CN112844052A (en) * | 2020-12-25 | 2021-05-28 | 德蓝水技术股份有限公司 | Hollow fiber curtain type membrane assembly for MBR process |
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