CN105771666A - Membrane filtration assembly - Google Patents
Membrane filtration assembly Download PDFInfo
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- CN105771666A CN105771666A CN201610226549.1A CN201610226549A CN105771666A CN 105771666 A CN105771666 A CN 105771666A CN 201610226549 A CN201610226549 A CN 201610226549A CN 105771666 A CN105771666 A CN 105771666A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/08—Flat membrane modules
- B01D63/082—Flat membrane modules comprising a stack of flat membranes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/025—Reverse osmosis; Hyperfiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/027—Nanofiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/08—Apparatus therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/02—Specific tightening or locking mechanisms
- B01D2313/025—Specific membrane holders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/04—Specific sealing means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/21—Specific headers, end caps
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a membrane filtration assembly, in particular to a nanofiltration or reverse osmosis membrance filtering assembly in the water treatment field. The invention discloses the membrane filtration assembly high in filtering efficiency in order to overcome the defect that an existing membrane filtration assembly is low in filtering efficiency. The assembly comprises a shell, a mandrel, a filtering structure, an upper cover assembly and a lower cover assembly. The upper cover assembly is arranged at the upper end of the mandrel, the lower cover assembly is disposed at the lower end of the mandrel, the mandrel is sleeved with the filtering structure, the filtering structure is axially pressed between the upper cover assembly and the lower cover assembly through a fastening structure, and the shell is arranged outside the filtering structure and connected with the upper cover assembly and the lower cover assembly. The filtering stricture comprises a plurality of flow guide discs and membranes, the flow guide discs and the membranes are sequentially sleeved with the mandrel in the axial direction of the mandrel. Each membrane is installed between every two adjacent flow guide discs. By selecting and combining some key parameters of the membranes through the membrane filtering assembly, filtering efficiency of the membrane filtering assembly can be higher, and the filtering rejection rate is unexpectedly good.
Description
Technical field
The present invention relates to a kind of membrane filtration module, particularly relate to the nanofiltration in water treatment field or reverse osmosis membrane filtration assembly.
Background technology
Present applicant develops one and is mainly used in sewage nanofiltration or reverse-osmosis treated membrane filtration module, this membrane filtration module includes shell, mandrel, filtration, cover assembly, lower cover component, cover assembly is arranged at the upper end of mandrel, lower cover component is arranged at the lower end of mandrel, filtration is socketed on mandrel and by fastening structure axial compression between cover assembly and lower cover component, and shell is arranged on the outside of filtration and connects cover assembly and lower cover component respectively.Wherein, described filtration includes up to a hundred and is socketed in the flow guiding disc on mandrel and diaphragm successively along the axial of mandrel, is provided with a diaphragm between two often adjacent flow guiding discs；Each flow guiding disc includes flow guiding disc body and is arranged on flow guiding disc body for the first centre bore coordinated with mandrel and the first flow-guiding channel deviateing this first centre bore, the side of each flow guiding disc body is additionally provided with the annular diversion cavity holding corresponding diaphragm, each annular diversion cavity and the first corresponding flow-guiding channel conducting；Each diaphragm includes diaphragm body and is arranged on diaphragm body for the second centre bore coordinated with mandrel and the second flow-guiding channel deviateing this second centre bore, each diaphragm body includes upper diaphragm, lower diaphragm and the cavity between upper diaphragm and lower diaphragm, described cavity and the conducting of the second centre bore；It is respectively equipped with sealing structure between each upper diaphragm with the inner edge of corresponding annular diversion cavity, between each lower diaphragm with the inner edge of corresponding annular diversion cavity, is respectively equipped with sealing structure；Described mandrel tubular structure, mandrel is provided with the through hole turned on by the tube chamber of the second centre bore of each diaphragm with mandrel, the cavity of these through holes, tube chamber and each diaphragm and the second centre bore constitute clean liquid conveying stream, and described mandrel upper end is provided with the clean liquid delivery outlet carrying stream to turn on clean liquid；First flow-guiding channel of each flow guiding disc and the second flow-guiding channel of each diaphragm are sequentially communicated composition stock solution conveying stream, cover assembly is provided with stock solution delivery outlet, cover assembly or lower cover component are provided with stock solution input port, are provided with the first passage turned on by the outfan of stock solution delivery outlet with stock solution conveying stream in shell and by the second channel of stock solution input port with the input conducting of stock solution conveying stream.
The publication number applied for by applicant is that CN103657414A, name are called that the patent documentation (calling list of references in the following text) of " with end Inlet and outlet water separating and filtering film post and feed liquid processing method thereof " discloses a kind of membrane filtration module, stock solution input port and stock solution delivery outlet are simultaneously located on cover assembly by this membrane filtration module exactly, form so-called " with holding Inlet and outlet water "；Additionally, the document it is also specifically disclosed that the first passage of the outfan conducting that stock solution delivery outlet and stock solution are carried stream arranged in shell and by the specific configuration of stock solution input port with the second channel of the input conducting of stock solution conveying stream.
Applicant now intends improving its filter efficiency on the basis of the membrane filtration module of list of references.The mode that can adopt has one to be the diameter increasing diaphragm, and two are to increase the quantity of flow deflector and diaphragm.But, if the floor space causing single membrane filtration module is increased by diameter accordingly that increase diaphragm, thus causing that the installation of membrane filtration module in limited occasion and usage quantity reduce；If increasing the quantity of flow deflector and diaphragm, the requirement of strength of mandrel is higher, need the diameter of overstriking mandrel in the usual way or mandrel is designed to double-decker, cause that outside diameter of mandrel enlarges markedly, thus reducing the effective filtration area of diaphragm, it addition, the sealing between each diaphragm with corresponding flow guiding disc is also had requirements at the higher level by the quantity increasing flow deflector and diaphragm.
Summary of the invention
First technical problem to be solved by this invention is in that the membrane filtration module providing a kind of filter efficiency higher, this membrane filtration module is by the selection of the several key parameter of diaphragm and combination, it is possible to make the filter efficiency of membrane filtration module higher and to filter rejection unexpected good.Second technical problem to be solved by this invention is in that to provide a kind of membrane filtration module improving the clean liquid way of output and cover assembly thereof, adopt this clean liquid way of output even thickness core can be become solid shafting for the wall thickness of increase mandrel to create conditions, thus improving the intensity of mandrel.Additionally, the 3rd technical problem to be solved by this invention is in that to provide membrane filtration module and the lower cover component thereof of the better tightness between a kind of diaphragm with corresponding flow guiding disc.
For solving above-mentioned first technical problem, the technical solution used in the present invention is, membrane filtration module, including shell, mandrel, filtration, cover assembly, lower cover component, wherein, cover assembly is arranged at the upper end of mandrel, and lower cover component is arranged at the lower end of mandrel, filtration is socketed on mandrel and by fastening structure axial compression between cover assembly and lower cover component, and shell is arranged on the outside of filtration and connects cover assembly and lower cover component respectively；Described filtration includes several and is socketed in the flow guiding disc on mandrel and diaphragm successively along the axial of mandrel, is provided with a diaphragm between two often adjacent flow guiding discs；Each flow guiding disc includes flow guiding disc body and is arranged on flow guiding disc body for the first centre bore coordinated with mandrel and the first flow-guiding channel deviateing this first centre bore, the side of each flow guiding disc body is additionally provided with the annular diversion cavity holding corresponding diaphragm, each annular diversion cavity and the first corresponding flow-guiding channel conducting；Each diaphragm includes diaphragm body and is arranged on diaphragm body for the second centre bore coordinated with mandrel and the second flow-guiding channel deviateing this second centre bore, each diaphragm body includes upper diaphragm, lower diaphragm and the cavity between upper diaphragm and lower diaphragm, described cavity and the conducting of the second centre bore；It is respectively equipped with sealing structure between each upper diaphragm with the inner edge of corresponding annular diversion cavity, between each lower diaphragm with the inner edge of corresponding annular diversion cavity, is respectively equipped with sealing structure；Described mandrel is provided with the flow-guiding structure turned on respectively with the second centre bore of each diaphragm, the cavity of described flow-guiding structure and each diaphragm and the second centre bore constitute clean liquid conveying stream, the clean liquid delivery outlet that described mandrel and/or cover assembly and/or lower cover component are provided with and clean liquid carries stream to turn on；First flow-guiding channel of each flow guiding disc and the second flow-guiding channel of each diaphragm are sequentially communicated composition stock solution conveying stream, cover assembly is provided with stock solution delivery outlet, cover assembly or lower cover component are provided with stock solution input port, are provided with the first passage turned on by the outfan of stock solution delivery outlet with stock solution conveying stream in shell and by the second channel of stock solution input port with the input conducting of stock solution conveying stream；If if setting individual diaphragm projected area on the cross section of mandrel as setting individual diaphragm projected area on the cross section of mandrel as A square metre, the external diameter of individual diaphragm is D rice, and the diaphragm quantity in this membrane filtration module is that N opens, then:
Wherein, 250≤B≤320.
The working method of above-mentioned membrane filtration module is: after stock solution (liquid to be filtered) inputs from stock solution input port, the arrival end of stock solution conveying stream is flowed to by second channel, stock solution is carried in stream course of conveying in this stock solution, stock solution enters in corresponding annular diversion cavity by the first flow-guiding channel on flow guiding disc and part stock solution enters into cavity by the filtration of upper diaphragm, lower diaphragm, stock solution (or being called dope) after treatment enters first passage, enter stock solution delivery outlet along this passage, flow out this membrane filtration module afterwards.Stock solution is after upper diaphragm and lower diaphragm process, and the clean liquid conveying stream that the clean liquid (liquid after upper diaphragm or lower membrane filtration) produced in the cavity on diaphragm body is constituted along this cavity and described second centre bore discharges this membrane filtration module by clean liquid delivery outlet.Because each annular diversion cavity and the first corresponding flow-guiding channel conducting, described stock solution conveying stream is to connect with the annular diversion cavity on flow guiding disc.Between each upper diaphragm with the inner edge of corresponding annular diversion cavity, it is respectively equipped with sealing structure, between each lower diaphragm with the inner edge of corresponding annular diversion cavity, is respectively equipped with sealing structure, be to stop stock solution to flow to the first centre bore and the second centre bore direction.Here sealing structure can be sealing ring.
In the middle of implementation process, crack mouth at flow guiding disc surface or annular diversion cavity end face or annular diversion cavity bottom surface, crack place turns up, tilts in guide flow table two sides respectively, formed domatic, because filtration includes several being axially socketed in the flow guiding disc on mandrel and diaphragm successively along mandrel, so stock solution can carry stream along stock solution, helically move.
Further, the external diameter of each diaphragm is 0.2 to 0.4 meter；Diaphragm quantity in membrane filtration module is 125 to 180.
When described
Wherein, 250≤B≤320.
Time, described diaphragm external diameter is 0.2 to 0.4 meter；Diaphragm quantity in membrane filtration module is 125 to 180.Preferably select for one.
Further, described mandrel is solid shafting；Then each first centre bore and the second centre bore are provided with gap with mandrel matching part respectively, and this gap may be configured as 0.5 to 2 millimeter, and this gap forms the clean liquid transfer passage as described flow-guiding structure；Described cover assembly and/or lower cover component are provided with the apocenosis passage connected with the outfan of described clean liquid transfer passage and the input of clean liquid delivery outlet respectively.
Mandrel is set to solid shafting, and not only with respect to the mandrel of hollow pipe, solid mandrel intensity is higher, and this also makes there is significant difference for the clean liquid conveying of conventional film filter assemblies.nullThe clean liquid conveying of conventional membrane filtration module is by the Pipeline transport within mandrel，Or mandrel is set to bimetallic tube (tubulose mandrel or solid core outer shaft sleeve blank pipe) makes clean liquid be carried by bimetallic tube，The clean liquid conveying of these conventional film filter assemblies all undoubtedly when diaphragm external diameter is fixing，Reduce diaphragm projected area on the cross section of mandrel，Thus reducing the filter efficiency of membrane filtration module，And the membrane filtration module of the present invention adopts solid mandrel and is respectively provided with sealing structure between each upper diaphragm with the inner edge of corresponding annular diversion cavity，After being respectively provided with sealing structure between each lower diaphragm with the inner edge of corresponding annular diversion cavity，The clean liquid transfer passage conveying that clean liquid is formed with the gap of mandrel matching part by the first centre bore on flow guiding disc and the second centre bore on diaphragm，Compared with carrying with the clean liquid of conventional film filter assemblies，When diaphragm external diameter is fixing，Because solid mandrel increases support performance relative to conventional film filter assemblies mandrel，Diaphragm area on the cross section of mandrel is also with respect to increasing，This also just improves the filter efficiency of this membrane filtration module.
It is further, the lobe around this first centre bore circumferential array it is provided with in first centre bore of each flow guiding disc, having gap between adjacent lobe, the outside circle of described lobe contacts cooperation with described mandrel, and described gap is then as the gap of the first centre bore Yu mandrel matching part.
Further, the width in the gap between described adjacent lobe is 1 to 3 millimeter.
Arranging lobe namely to carry out radially positioning also allowing clean liquid can smoothly pass over the first centre bore to filtration by mandrel, lobe here can be the plate profile structure with rectified action simultaneously.
This membrane filtration module is through repeated tests and practice, find the filter efficiency of membrane filtration module and multiple relating to parameters, wherein diaphragm projected area on the cross section of mandrel is A square metre, here projected area does not include the second centre bore and the cross-sectional area of the second flow-guiding channel making stock solution and passing through diaphragm in this membrane filtration module, it is found by the applicant that when the ratio between the number product of this projected area and diaphragm and the area of a circle constituted with diaphragm external diameter is between 250 to 320, compared to conventional film filter assemblies, the filter efficiency of membrane filtration module and filtration rejection are all significantly improved by the membrane filtration module of the present invention, create the beyond thought effect of those skilled in the art.
For solving above-mentioned second technical problem, the present invention adopt for the membrane filtration module of above-mentioned membrane filtration module and cover assembly thereof.
Particularly, described cover assembly includes upper flange plate and upper sealing panel, and lower cover component includes lower flange and lower seal plate；Described filtration is held between described upper sealing panel and lower seal plate, upper sealing panel is held between described filtration and upper flange plate, lower seal plate is held between described filtration and lower flange, and shell is fixed between upper flange plate and lower flange；Described fastening structure includes the many rod assemblies being connected between upper flange plate and lower flange, and mandrel is connected with upper sealing panel and lower seal plate respectively, and the upper end of mandrel connects threaded fastening device after being upward through upper sealing panel and upper flange plate；Arranging the apocenosis passage connected with described clean liquid transfer passage on described upper sealing panel, this apocenosis passage tilts upward relative to clean liquid transfer passage and extends and turn on the clean liquid delivery outlet being arranged on upper flange plate；Being additionally provided with stock solution delivery outlet and stock solution input port on described upper flange plate, described clean liquid delivery outlet, stock solution delivery outlet and stock solution input port are centered around the periphery of mandrel on upper flange plate and arrange.
Adopt and the apocenosis passage that clean liquid is discharged specially is set, not only increase the efficiency collecting clean liquid, but also making mandrel make under same diameter, that wall thickness can become is thicker, even makes thickness core become solid shafting, makes the pressure performance of this membrane filtration module be significantly increased.
Further, described apocenosis passage and horizontal plane angle are 5 to 60 °.
Under this angle, it is possible to make the liquid in apocenosis passage discharge effect more excellent.
By adopting membrane filtration module and the cover assembly thereof improving the clean liquid way of output, adopting this clean liquid way of output can be that the wall thickness (even thickness core being become solid shafting) thickening mandrel creates conditions, thus improving the resistance to pressure of membrane filtration module.
For solving above-mentioned 3rd technical problem, the present invention adopt for the membrane filtration module of above-mentioned membrane filtration module and lower cover component thereof.
Particularly, the lower end of described mandrel connects threaded fastening device after being passed down through lower seal plate and lower flange.
Adopt the mode of such double; two pretension partially, better can provide pretightning force to described membrane filtration module, make membrane filtration module more solid and reliable.
Further, the threaded fastening device of described mandrel upper end includes preload piece and nut；The threaded fastening device of described mandrel lower end includes lower preload piece and nut；Described upper preload piece lower surface contacts compression through upper flange plate with the upper surface of upper sealing panel, and described upper preload piece upper end is upward through upper flange plate and arranges nut；Described lower preload piece is integrally provided in the lower section of lower flange, and the lower upper surface of preload piece contacts compression with the lower surface of lower flange, and described lower preload piece lower end arranges nut.
Described upper preload piece can be multidiameter structure, and this big end of multidiameter structure contacts with upper sealing panel, and lower preload piece here can be frustum cone structure, and the big end of this frustum cone structure contacts with lower flange.Because described sealing structure is arranged between each upper diaphragm with the inner edge of corresponding annular diversion cavity and between each lower diaphragm with the inner edge of corresponding annular diversion cavity, the contact area of lower preload piece here and lower flange should more than the contact area of upper preload piece Yu upper sealing panel, the pressure that the threaded fastening device of such mandrel upper end and the threaded fastening device of mandrel lower end produce is to the concentration on mandrel week edge, so not only described shell is provided better pretightning force, also directly described filtration is provided better pretightning force, and make upper diaphragm, sealing property between lower diaphragm with the inner edge of corresponding annular diversion cavity is better.
Further, each diaphragm is RO film or NF film.
RO is the abbreviation of English ReverseOsmosismembrane, and Chinese is meant to reverse osmosis.The type of flow of general water is to be flowed to high concentration by low concentration, water once pressurization after, will by high concentration flow to low concentration, that is what is called reverse osmosis principle: owing to the aperture of RO film is 5/1000000ths (0.0001 microns) of hairline, general naked eyes cannot be seen, antibacterial, virus are its 5000 times, therefore, only the mineral ion of hydrone and the useful human body of part can pass through, and other impurity and heavy metal are discharged by waste pipe.The process of all desalinizations, and spaceman's waste water recycling device all adopts the method, therefore RO film is also known as external high-tech " artificial kidney ".At present both at home and abroad, the military civil area of medical science, all take top RO film to carry out macromolecular filtering.
NF film is NF membrane, and nanofiltration is a kind of pressure-driven membrane separating process between reverse osmosis and ultrafiltration, and the pore diameter range of NF membrane is at several ran.Compared with other pressure-driven membrane separating process, occur later.NF membrane is mostly from reverse osmosis membrane derivation, such as CA, CTA film, aromatic polyamide composite membrane and sulfonated polyether sulfone film etc..
Accompanying drawing explanation
Fig. 1 is the structural representation of membrane filtration module；
Fig. 2 is the schematic top plan view of membrane filtration module cover assembly；
Fig. 3 be in Fig. 2 A-A to cross-sectional schematic；
Fig. 4 is two flow guiding discs and the filtration decomposing schematic representation of a diaphragm composition；
Fig. 5 is the cross-sectional schematic of the filtration of two flow guiding discs and a diaphragm composition；
Fig. 6 is the schematic top plan view of flow guiding disc；
Fig. 7 is the schematic top plan view of diaphragm；
Fig. 8 is the schematic diagram of membrane filtration module cover assembly.
Detailed description of the invention
Describe embodiment below in conjunction with accompanying drawing the present invention is specifically described.
Such as Fig. 1-8, the technical solution used in the present invention is, membrane filtration module, including shell 1, mandrel 2, filtration 3, cover assembly 4, lower cover component 5, wherein, cover assembly 4 is arranged at the upper end of mandrel 2, and lower cover component 5 is arranged at the lower end of mandrel 2, filtration 3 is socketed on mandrel 2 and by fastening structure axial compression between cover assembly 4 and lower cover component 5, and shell 1 is arranged on the outside of filtration 3 and connects cover assembly 4 and lower cover component 5 respectively；Described filtration 3 includes several flow guiding disc 301 being axially socketed on mandrel 2 successively along mandrel 2 and diaphragm 302, is provided with a diaphragm 302 between two often adjacent flow guiding discs 301；Each flow guiding disc 301 includes flow guiding disc body and is arranged on flow guiding disc body for the first centre bore 301a coordinated with mandrel 2 and the first flow-guiding channel 301b deviateing this first centre bore 301a, the side of each flow guiding disc body is additionally provided with the annular diversion cavity 301c holding corresponding diaphragm 302, each annular diversion cavity 301c and the first corresponding flow-guiding channel 301b conducting；Each diaphragm 302 includes diaphragm body and is arranged on diaphragm body for the second centre bore 302a coordinated with mandrel 2 and the second flow-guiding channel 302b deviateing this second centre bore 302a, each diaphragm body includes upper diaphragm 3021, lower diaphragm 3022 and the cavity 3023 between upper diaphragm 3021 and lower diaphragm 3022, described cavity 3023 and the second centre bore 302a conducting；It is respectively equipped with sealing structure 6 between each upper diaphragm 3021 with the inner edge 301d of corresponding annular diversion cavity 301c, between each lower diaphragm 3022 and the inner edge 301d of corresponding annular diversion cavity 301c, is respectively equipped with sealing structure 6；Described mandrel 2 be provided with respectively with each diaphragm 302 second centre bore 302a conducting flow-guiding structure, the cavity 3023 of described flow-guiding structure and each diaphragm 302 and the second centre bore 302a constitute clean liquid conveying stream 7, the clean liquid delivery outlet 9 that described cover assembly 4 is provided with and clean liquid carries stream 7 to turn on；First flow-guiding channel 301b of each flow guiding disc 301 and the second flow-guiding channel 302b of each diaphragm 302 is sequentially communicated composition stock solution conveying stream 8, cover assembly 4 is provided with stock solution delivery outlet 12, cover assembly 4 or lower cover component 5 are provided with stock solution input port 11, are provided with the first passage turned on by the outfan of stock solution delivery outlet 12 with stock solution conveying stream 8 in shell 1 and by the second channel of stock solution input port 11 with the input conducting of stock solution conveying stream 8；If setting individual diaphragm 302 projected area on the cross section of mandrel 2 as A square metre, the external diameter of individual diaphragm 302 is D rice,
ThenWherein, 250≤B≤320.
Wherein diaphragm projected area on the cross section of mandrel 2 is A square metre, here projected area does not include the second centre bore 302a and the cross-sectional area of the second flow-guiding channel 302b making stock solution and passing through diaphragm 302 in this membrane filtration module, it is found by the applicant that when the ratio between the number product of this projected area and diaphragm 302 and the area of a circle constituted with diaphragm 302 external diameter is between 250 to 320, compared to conventional film filter assemblies, the filter efficiency of membrane filtration module and filtration rejection are all significantly improved by the membrane filtration module of the present invention, create the beyond thought effect of those skilled in the art.
Described filtration is known is column construction, so flow guiding disc 301 here can be disc-shaped structure, the described preferred shape of diaphragm 302 also should be suitable with the shape of this flow guiding disc 301, the disc-shaped structure of this flow guiding disc 301 can be that edge extends projection to both sides, the tangent plane making this flow guiding disc 301 is I-shaped, so just forms above-mentioned annular diversion cavity 301c on flow guiding disc 301.
The filtration 3 of the present embodiment includes several flow guiding disc 301 being axially socketed on mandrel 2 successively along mandrel 2 and diaphragm 302, the number of flow guiding disc 301 here can be more than 148, the number of diaphragm 302 can be more than 147, and described diaphragm 302 external diameter is 0.2 to 0.4 meter.Described upper diaphragm 3021 and lower diaphragm 3022 are RO film or NF film.
After described stock solution inputs from stock solution input port 11, flowing to stock solution conveying stream 8 by second channel, stock solution is carried in stream 8 course of conveying in this stock solution, and stock solution enters in described annular diversion cavity 301c, flow between flow guiding disc 301 and diaphragm 302, allow diaphragm 302 that stock solution to be processed fully.Stock solution (or being called dope) after treatment enters first passage, enters stock solution delivery outlet 9 along this passage, flows out this membrane filtration module afterwards.
Stock solution is after diaphragm 302 processes, and the clean liquid conveying stream 7 that the clean liquid produced in the cavity on diaphragm body is constituted along this cavity 3023 and described second centre bore discharges this membrane filtration module by clean liquid delivery outlet 9.Because each annular diversion cavity 301c and the first corresponding flow-guiding channel 301b conducting, described stock solution conveying stream 8 is to connect with the annular diversion cavity 301c on flow guiding disc 301.Sealing structure 6 it is respectively equipped with between each upper diaphragm 3021 with the inner edge 301d of corresponding annular diversion cavity 301c, it is respectively equipped with sealing structure 6 between each lower diaphragm 3022 with the inner edge 301d of corresponding annular diversion cavity 301c, is to stop stock solution to flow to the first centre bore 301a and the second centre bore 302a direction.Here sealing structure 6 can be sealing ring.
Can be cracked mouth on this flow guiding disc 301, diaphragm 302 arranges the breach adaptive with this sealing, this sealing forms described first flow-guiding channel 301b, this breach forms described first flow-guiding channel 301b, so just above-mentioned stock solution conveying stream 8 can be realized, certainly, stock solution conveying stream 8 is to connect with the annular diversion cavity 301c on flow guiding disc 301.
Crack mouth at flow guiding disc 301 surface or annular diversion cavity 301c end face or annular diversion cavity 301c bottom surface, crack place turns up, tilts in guide flow table 301 two sides respectively, formed domatic, because filtration 3 includes several flow guiding disc 301 being axially socketed on mandrel 2 successively along mandrel 2 and diaphragm 302, so stock solution can carry stream 8 along stock solution, helically moving, in figure, the direction of arrow is the stock solution direction of motion.
Described mandrel 2 is solid shafting, then each first centre bore 301a and the second centre bore 302a is provided with gap with mandrel 2 matching part respectively, and this gap may be configured as 0.5 to 2 millimeter, and this gap forms the clean liquid transfer passage 701 as described flow-guiding structure；Described cover assembly 4 is provided with the apocenosis passage 10 connected respectively with the outfan of described clean liquid transfer passage 701 and the input of clean liquid delivery outlet 9, described cover assembly 4 or lower cover component 5 are provided with cloth opening, this cloth opening connects (concrete structure here can refer to list of references) with the port of export of described second channel, carries stream 8 to connect with described first passage also by stock solution.After mandrel 2 is set to solid circular shafts, whole membrane filtration module can be brought higher resistance to pressure, so relative to hollow shaft member, can not change, even expand on the basis of effective filtration area of filter element, increase the number of filter element, improve the filtering efficiency of this membrane filtration module.
Being provided with the lobe 3011 of rich this first centre bore 301a arrangement on described flow guiding disc 301 in first centre bore 301a, have gap between adjacent lobe 3011, the outside circle of described lobe 3011 coordinates with described mandrel 2.Arranging lobe 3011 namely to carry out filtration 3 radially positioning also allowing clean liquid can smoothly pass over the first centre bore 301a by mandrel 2, lobe 3011 here can be have the plate profile structure about rectification simultaneously.There is gap between described adjacent lobe 3011 and can be 1 to 3 millimeter.
Described cover assembly 4 includes upper flange plate 401 and upper sealing panel 402, and lower cover component 5 includes lower flange 501 and lower seal plate 502；Described filtration 3 is held between described upper sealing panel 402 and lower seal plate 502, upper sealing panel 402 is held between described filtration 3 and upper flange plate 401, lower seal plate 502 is held between described filtration 3 and lower flange 501, and shell 1 is fixed between upper flange plate 401 and lower flange 501；Described fastening structure includes the many rod assemblies being connected between upper flange plate 401 and lower flange 501 16, mandrel 2 is connected with upper sealing panel 402 and lower seal plate 502 respectively, and the upper end of mandrel 2 connects threaded fastening device after being upward through upper sealing panel 402 and upper flange plate 401；Arranging the apocenosis passage 10 connected with described clean liquid transfer passage 701 on described upper sealing panel 402, this apocenosis passage 10 tilts upward extension relative to clean liquid transfer passage 701 and turns on the clean liquid delivery outlet 9 being arranged on upper flange plate 401；Being additionally provided with stock solution delivery outlet 12 and stock solution input port 11 on described upper flange plate 401, described clean liquid delivery outlet 9, stock solution delivery outlet 12 and stock solution input port 11 are centered around the periphery of mandrel 2 on upper flange plate 401 and arrange.Described apocenosis passage 10 is 5 to 60 ° with horizontal plane angle.The lower end of described mandrel 2 connects threaded fastening device after being passed down through lower seal plate 502 and lower flange 501.
Described lower seal plate 502 can be arranged the cloth opening (this cloth opening is not shown in the drawings) connecting with described second channel and being connected with described first passage by stock solution conveying stream 8.Described fastening structure includes the many rod assemblies being connected between upper flange plate 401 and lower flange 501 16, and rod assembly 16 is made up of many studs and multiple nut.
Described threaded fastening device includes preload piece 13, lower preload piece 14 and nut 15；Described upper preload piece 13 contacts with upper sealing panel 402 and makes this upper sealing panel 402 be pressed between upper preload piece 13 and described filtration 3；Described lower preload piece 14 contacts with lower flange and makes this lower flange be pressed between lower preload piece 14 and described lower seal plate 502.So not only described shell 1 is provided better pretightning force, also directly described filtration 3 is provided better pretightning force.And make the sealing property between upper diaphragm, lower diaphragm with the inner edge of corresponding annular diversion cavity better.
Specifically, described upper flange plate 401 is provided with on coordinate with described upper preload piece 13 first and coordinates through hole 4011, described upper sealing panel 402 is provided with the second through hole 4022 that connect with second channel of the first through hole 4021 constituting first passage and cooperation through hole 4023 on second coordinated with described mandrel 2, described lower flange 501 is provided with first time coordinated with described mandrel 2 and coordinates through hole 5011, and described lower seal plate 502 is provided with second time coordinated with described mandrel and coordinates through hole 5021.
The threaded fastening device of described mandrel 2 upper end includes preload piece 13 and nut 15；The threaded fastening device of described mandrel 2 lower end includes lower preload piece 14 and nut 15；Described upper preload piece 13 lower surface contacts compression through upper flange plate 401 with the upper surface of upper sealing panel 402, and described upper preload piece 13 upper end is upward through upper flange plate 401 and arranges nut 15；Described lower preload piece 14 is integrally provided in the lower section of lower flange 501, the upper surface of lower preload piece 14 contacts compression with the lower surface of lower flange 501, described lower preload piece 14 lower end arranges nut 15, adopt the mode of such double; two pretension partially, better can provide pretightning force to membrane filtration module, make membrane filtration module more solid and reliable.
Claims (10)
1. membrane filtration module, including shell (1), mandrel (2), filtration (3), cover assembly (4), lower cover component (5), wherein, cover assembly (4) is arranged at the upper end of mandrel (2), lower cover component (5) is arranged at the lower end of mandrel (2), filtration (3) is socketed in mandrel (2) above and by fastening structure axial compression between cover assembly (4) and lower cover component (5), shell (1) is arranged on the outside of filtration (3) and connects cover assembly (4) and lower cover component (5) respectively；
Described filtration (3) includes several the flow guiding discs (301) being axially socketed on mandrel (2) successively along mandrel (2) and diaphragm (302), is provided with a diaphragm (302) between two often adjacent flow guiding discs (301)；
Each flow guiding disc (301) includes flow guiding disc body and is arranged on flow guiding disc body for the first centre bore (301a) coordinated with mandrel (2) and the first flow-guiding channel (301b) deviateing this first centre bore (301a), being additionally provided with the annular diversion cavity (301c) holding corresponding diaphragm (302) on the side of each flow guiding disc body, each annular diversion cavity (301c) turns on corresponding the first flow-guiding channel (301b)；
Each diaphragm (302) includes diaphragm body and is arranged on diaphragm body for the second centre bore (302a) coordinated with mandrel (2) and the second flow-guiding channel (302b) deviateing this second centre bore (302a), each diaphragm body includes upper diaphragm (3021), lower diaphragm (3022) and the cavity (3023) being positioned between upper diaphragm (3021) and lower diaphragm (3022), described cavity (3023) and the second centre bore (302a) conducting；
It is respectively equipped with sealing structure (6) between each upper diaphragm (3021) with the inner edge (301d) of corresponding annular diversion cavity (301c), between each lower diaphragm (3022) with the inner edge (301d) of corresponding annular diversion cavity (301c), is respectively equipped with sealing structure (6)；
Described mandrel (2) is provided with the flow-guiding structure turned on respectively with second centre bore (302a) of each diaphragm (302), the cavity (3023) of described flow-guiding structure and each diaphragm (302) and the second centre bore (302a) constitute clean liquid conveying stream (7), and described mandrel (2) and/or cover assembly (4) and/or lower cover component (5) are provided with the clean liquid delivery outlet (9) carrying stream (7) to turn on clean liquid；
First flow-guiding channel (301b) of each flow guiding disc (301) and second flow-guiding channel (302b) of each diaphragm (302) are sequentially communicated composition stock solution conveying stream (8), cover assembly (4) is provided with stock solution delivery outlet (12), cover assembly (4) or lower cover component (5) are provided with stock solution input port (11), the first passage turned on by the outfan of stock solution delivery outlet (12) with stock solution conveying stream (8) it is provided with and by the second channel of stock solution input port (11) with the input conducting of stock solution conveying stream (8) in shell (1)；
It is characterized in that:
If setting individual diaphragm (302) projected area on the cross section of mandrel (2) as A square metre,
The external diameter of individual diaphragm (302) is D rice,
Diaphragm (302) quantity in this membrane filtration module is that N opens, then:
Wherein, 250≤B≤320.
2. membrane filtration module according to claim 1, it is characterised in that: the external diameter of each diaphragm (302) is 0.2 to 0.4 meter；Diaphragm (302) quantity in membrane filtration module is 125 to 180.
3. membrane filtration module according to claim 1 and 2, it is characterised in that: described mandrel (2) is solid shafting；Then each first centre bore (301a) and the second centre bore (302a) are provided with gap with mandrel (2) matching part respectively, and this gap forms the clean liquid transfer passage (701) as described flow-guiding structure；Described cover assembly (4) and/or lower cover component (5) are provided with the apocenosis passage (10) connected with the described outfan of clean liquid transfer passage (701) and the input of clean liquid delivery outlet (9) respectively.
4. membrane filtration module according to claim 3, it is characterized in that: in first centre bore (301a) of each flow guiding disc (301), be provided with the lobe (3011) around this first centre bore (301a) circumferential array, adjacent lobe has gap between (3011), the outside circle of described lobe (3011) contacts cooperation with described mandrel (2), and described gap is then as the gap of the first centre bore (301a) Yu mandrel (2) matching part.
5. membrane filtration module according to claim 4, it is characterised in that: the width in the gap between described adjacent lobe (3011) is 1 to 3 millimeter.
6. membrane filtration module according to claim 3, it is characterized in that: described cover assembly (4) includes upper flange plate (401) and upper sealing panel (402), lower cover component (5) includes lower flange (501) and lower seal plate (502)；Described filtration (3) is held between described upper sealing panel (402) and lower seal plate (502), upper sealing panel (402) is held between described filtration (3) and upper flange plate (401), lower seal plate (502) is held between described filtration (3) and lower flange (501), and shell (1) is fixed between upper flange plate (401) and lower flange (501)；Described fastening structure includes the many rod assemblies (16) being connected between upper flange plate (401) and lower flange (501), mandrel (2) is connected with upper sealing panel (402) and lower seal plate (502) respectively, and the upper end of mandrel (2) is upward through upper sealing panel (402) and upper flange plate (401) connects threaded fastening device afterwards；Described upper sealing panel (402) above arranges the apocenosis passage (10) connected with described clean liquid transfer passage (701), and this apocenosis passage (10) tilts upward relative to clean liquid transfer passage (701) and extends and turn on the clean liquid delivery outlet (9) being arranged on upper flange plate (401)；Described upper flange plate (401) is additionally provided with stock solution delivery outlet (12) and stock solution input port (11), described clean liquid delivery outlet (9), has the periphery that stock solution delivery outlet (12) and stock solution input port (11) are centered around mandrel (2) on upper flange plate (401) to arrange.
7. membrane filtration module according to claim 6, it is characterised in that: described apocenosis passage (10) and horizontal plane angle are 5 to 60 °.
8. membrane filtration module according to claim 6, it is characterised in that: the lower end of described mandrel (2) is passed down through lower seal plate (502) and lower flange (501) connects threaded fastening device afterwards.
9. membrane filtration module according to claim 8, it is characterised in that: the threaded fastening device of described mandrel (2) upper end includes preload piece (13) and nut (15)；The threaded fastening device of described mandrel (2) lower end includes lower preload piece (14) and nut (15)；Described upper preload piece (13) lower surface contacts compression through upper flange plate (401) with the upper surface of upper sealing panel (402), and described upper preload piece (13) upper end is upward through upper flange plate (401) and arranges nut (15)；Described lower preload piece (14) is integrally provided in the lower section of lower flange (501), the upper surface of lower preload piece (14) contacts compression with the lower surface of lower flange (501), and described lower preload piece (14) lower end arranges nut (15).
10. membrane filtration module according to claim 1, it is characterised in that: each diaphragm (302) is RO film or NF film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610226549.1A CN105771666A (en) | 2016-04-12 | 2016-04-12 | Membrane filtration assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610226549.1A CN105771666A (en) | 2016-04-12 | 2016-04-12 | Membrane filtration assembly |
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| CN105771666A true CN105771666A (en) | 2016-07-20 |
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| CN109011912A (en) * | 2017-06-12 | 2018-12-18 | 阿特拉斯·科普柯空气动力股份有限公司 | Coalescing filter |
| CN109253327A (en) * | 2018-09-20 | 2019-01-22 | 四川美富特水务有限责任公司 | A kind of dish tubular type membrane component |
| CN109761312A (en) * | 2019-03-25 | 2019-05-17 | 山东建筑大学 | A kind of ultrafiltration membrance filter component |
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