CN205613289U - Membrane filtering component and upper cover subassembly thereof - Google Patents

Abstract

The utility model relates to a membrane filtering component especially relates to receiving in the water treatment field and strains or reverse osmosis membrane filtering component and upper cover subassembly thereof. Problem to present conventional membrane filtering component's pressure resistance shortcoming, the utility model discloses a membrane filtering component and upper cover subassembly thereof, membrane filtering component include the dabber, the upper cover subassembly includes ring flange and upper seal plate, the last setting of upper seal plate with the flowing back passageway of clean liquid transfer passage intercommunication, this flowing back passageway upwards extend for the slope of clean liquid transfer passage and switch on with the clean liquid delivery outlet that sets up on last ring flange, adopt to set up the special flowing back passageway that discharges of clean liquid, have not only improved the efficiency of collecting clean liquid, but also make the dabber make thicker that the wall thickness can become under same diameter, make even to favor the core and become solid shafting, and the pressure resistance that makes this membrane filtering component has apparent improvement.

Description

Membrane filtration module and cover assembly thereof

Technical field

This utility model relates to a kind of membrane filtration module, particularly relates 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 that up to a hundred are socketed in the flow guiding disc on mandrel and diaphragm successively along the axial of mandrel, are provided with a diaphragm between two the most adjacent flow guiding discs；Each flow guiding disc includes flow guiding disc body and is arranged on flow guiding disc body the first centre bore for coordinating with mandrel and deviates the first flow-guiding channel of this first centre bore, the annular diversion cavity accommodating corresponding diaphragm, each annular diversion cavity and the first corresponding flow-guiding channel conducting it is additionally provided with on the side of each flow guiding disc body；Each diaphragm includes diaphragm body and is arranged on diaphragm body the second centre bore for coordinating with mandrel and deviates the second flow-guiding channel of 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 of the second centre bore of each diaphragm with the tube chamber conducting of mandrel, these through holes, tube chamber and the cavity of each diaphragm and the second centre bore constitute clean liquid conveying stream, and described mandrel upper end is provided with and the clean liquid delivery outlet of clean liquid conveying stream conducting；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, in shell, are provided with the first passage turned on by the outfan of stock solution delivery outlet with stock solution conveying stream and the second channel by stock solution input port with the input conducting of stock solution conveying stream.

Publication No. CN103657414A, the patent documentation (calling list of references in the following text) of entitled " with end Inlet and outlet water separating and filtering film post and feed liquid processing method thereof " applied for by applicant disclose 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 interior outfan conducting that stock solution delivery outlet and stock solution carry stream arranged of shell and by stock solution input port and the specific configuration of 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.Can have one in the way of employing is 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 cause the installation of membrane filtration module in limited occasion and usage quantity to reduce；If increasing flow deflector and the quantity of diaphragm, higher to the requirement of strength of mandrel, need the diameter of overstriking mandrel in the usual way or mandrel is designed to double-decker, outside diameter of mandrel is caused to significantly increase, thus reduce the effective filtration area of diaphragm, it addition, the quantity increasing flow deflector and diaphragm also has requirements at the higher level to the sealing between each diaphragm with corresponding flow guiding disc.

Utility model content

First technical problem to be solved in the utility model is the membrane filtration module providing a kind of filter efficiency higher, this membrane filtration module is by the selection of key parameters several to diaphragm and combination, so that the filter efficiency of membrane filtration module is higher and it is unexpected good to filter rejection.Second technical problem to be solved in the utility model is to provide a kind of membrane filtration module improving the clean liquid way of output and cover assembly thereof, using this clean liquid way of output can be that thickness core is even become solid shafting and creates conditions by the wall thickness increasing mandrel, thus improves the intensity of mandrel.Additionally, the 3rd technical problem to be solved in the utility model is 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 adopted in the utility model 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 that several are socketed in the flow guiding disc on mandrel and diaphragm successively along the axial of mandrel, are provided with a diaphragm between two the most adjacent flow guiding discs；Each flow guiding disc includes flow guiding disc body and is arranged on flow guiding disc body the first centre bore for coordinating with mandrel and deviates the first flow-guiding channel of this first centre bore, the annular diversion cavity accommodating corresponding diaphragm, each annular diversion cavity and the first corresponding flow-guiding channel conducting it is additionally provided with on the side of each flow guiding disc body；Each diaphragm includes diaphragm body and is arranged on diaphragm body the second centre bore for coordinating with mandrel and deviates the second flow-guiding channel of 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 be provided with respectively with each diaphragm second centre bore conducting flow-guiding structure, described flow-guiding structure constitutes clean liquid conveying stream with cavity and second centre bore of each diaphragm, and described mandrel and/or cover assembly and/or lower cover component are provided with and the clean liquid delivery outlet of clean liquid conveying stream conducting；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, in shell, are provided with the first passage turned on by the outfan of stock solution delivery outlet with stock solution conveying stream and the second channel by 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: stock solution (liquid to be filtered) is after stock solution input port inputs, the arrival end of stock solution conveying stream is flowed to by second channel, stock solution is in this stock solution conveying stream course of conveying, 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 referred to as 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 constituted along this cavity and described second centre bore at the clean liquid (liquid after upper diaphragm or lower membrane filtration) produced in the cavity on diaphragm body 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, at crack, guide flow table two sides are turned up, are tilted 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；The most 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 of conventional film filter assemblies carries.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 the most undoubtedly in the case of diaphragm external diameter is fixing，Reduce diaphragm projected area on the cross section of mandrel，Thus reduce the filter efficiency of membrane filtration module，And membrane filtration module of the present utility model uses 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 that clean liquid is formed by the gap of the first centre bore on flow guiding disc and the second centre bore on diaphragm and mandrel matching part carries，Compared with the conveying of the clean liquid of conventional film filter assemblies，In the case of 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 most 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 i.e. to carry out radially positioning 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 the most 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 the ratio between the number product of this projected area and diaphragm and the area of a circle constituted with diaphragm external diameter 250 to 320 between time, compared to conventional film filter assemblies, the filter efficiency of membrane filtration module and filtration rejection are all significantly improved by membrane filtration module of the present utility model, create the beyond thought effect of those skilled in the art.

For solving above-mentioned second technical problem, the membrane filtration module for above-mentioned membrane filtration module of this utility model employing 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.

Use and the apocenosis passage discharged clean liquid 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, the liquid in apocenosis passage can be made to discharge effect more excellent.

Improved membrane filtration module and the cover assembly thereof of the clean liquid way of output by employing, using this clean liquid way of output can be that the wall thickness (even thickness core being become solid shafting) thickening mandrel creates conditions, thus improves the resistance to pressure of membrane filtration module.

For solving above-mentioned 3rd technical problem, the membrane filtration module for above-mentioned membrane filtration module of this utility model employing and lower cover component thereof.

Particularly, threaded fastening device is connected after the lower end of described mandrel is passed down through lower seal plate and lower flange.

Use the mode of such double pretension partially, preferably 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 be more than the contact area of upper preload piece with upper sealing panel, the pressure that so threaded fastening device of the threaded fastening device of mandrel upper end and mandrel lower end the produces concentration to mandrel week edge, the most described shell is provided more preferable pretightning force, also directly described filtration is provided more preferable pretightning force, and make upper diaphragm, sealing property between lower diaphragm with the inner edge of corresponding annular diversion cavity is more preferable.

Further, each diaphragm is RO film or NF film.

RO is the abbreviation of English Reverse Osmosis membrane, and the Chinese meaning is reverse osmosis.The type of flow of general water is to be flowed to high concentration by low concentration, after water once pressurizes, will be 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, the only 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 uses the method, therefore RO film is also known as external high-tech " artificial kidney ".The most 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 this utility model is specifically described.

Such as Fig. 1-8, the technical solution adopted in the utility model 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 in successively on mandrel 2 along mandrel 2 and diaphragm 302, is provided with a diaphragm 302 between two the most adjacent flow guiding discs 301；Each flow guiding disc 301 includes flow guiding disc body and is arranged on flow guiding disc body the first centre bore 301a for coordinating with mandrel 2 and deviates the first flow-guiding channel 301b of this first centre bore 301a, annular diversion cavity 301c accommodating corresponding diaphragm 302, each annular diversion cavity 301c and the first corresponding flow-guiding channel 301b conducting it is additionally provided with on the side of each flow guiding disc body；Each diaphragm 302 includes diaphragm body and is arranged on diaphragm body the second centre bore 302a for coordinating with mandrel 2 and deviates the second flow-guiding channel 302b of 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, and described cavity 3023 and the second centre bore 302a turns on；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, described flow-guiding structure constitutes clean liquid conveying stream 7 with the cavity 3023 and the second centre bore 302a of each diaphragm 302, and described cover assembly 4 is provided with and the clean liquid delivery outlet 9 of clean liquid conveying stream 7 conducting；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, in shell 1, are provided with the first passage turned on by the outfan of stock solution delivery outlet 12 with stock solution conveying stream 8 and the second channel by 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 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 250 to 320 between time, compared to conventional film filter assemblies, the filter efficiency of membrane filtration module and filtration rejection are all significantly improved by membrane filtration module of the present utility model, create the beyond thought effect of those skilled in the art.

It is column construction that described filtration understands, 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, the most 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 in successively on mandrel 2 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.

Described stock solution is after stock solution input port 11 inputs, flowing to stock solution conveying stream 8 by second channel, stock solution is in this stock solution conveying stream 8 course of conveying, 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 sufficiently to be processed.Stock solution (or referred to as 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 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 on this flow guiding disc 301 mouth, the breach adaptive with this sealing is set on diaphragm 302, this sealing forms described first flow-guiding channel 301b, this breach forms described first flow-guiding channel 301b, the most just above-mentioned stock solution conveying stream 8 can be realized, certainly, stock solution conveying stream 8 is to connect with 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, at crack, guide flow table 301 two sides are turned up, are tilted respectively, formed domatic, because filtration 3 includes several flow guiding disc 301 being axially socketed in successively on mandrel 2 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, and the most 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, connects with described first passage also by stock solution conveying stream 8.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 be on the basis of the effective filtration area not changing, even expanding 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 i.e. to carry out filtration 3 radially positioning allowing clean liquid can smoothly pass over the first centre bore 301a by mandrel 2, lobe 3011 here can be to have the plate profile structure about rectification the most 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.

The cloth opening (this cloth opening is the most not shown) connecting with described second channel and being connected with described first passage by stock solution conveying stream 8 can be set on described lower seal plate 502.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.The most described shell 1 is provided more preferable pretightning force, also directly described filtration 3 is provided more preferable pretightning force.And make the sealing property between upper diaphragm, lower diaphragm with the inner edge of corresponding annular diversion cavity more preferable.

Specifically, described upper flange plate 401 is provided with on first coordinated with described upper preload piece 13 cooperation through hole 4011, described upper sealing panel 402 be provided with constitute second through hole 4022 that connect with second channel of the first through hole 4021 of first passage and coordinate with described mandrel 2 second on cooperation through hole 4023, described lower flange 501 is provided with the first time cooperation through hole 5011 coordinated with described mandrel 2, and described lower seal plate 502 is provided with the second time cooperation through hole 5021 coordinated with described mandrel.

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, use the mode of such double pretension partially, preferably 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), and lower cover component (5) is arranged at the lower end of mandrel (2), mistake Filter structure (3) is socketed in mandrel (2) above and by fastening structure axial compression in cover assembly (4) and lower cover component (5) Between, 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 in successively on mandrel (2) along mandrel (2) With diaphragm (302), between two the most adjacent flow guiding discs (301), a diaphragm (302) is installed；

Each flow guiding disc (301) includes flow guiding disc body and is arranged on flow guiding disc body in first coordinated with mandrel (2) Central hole (301a) and deviate first flow-guiding channel (301b) of this first centre bore (301a), the side of each flow guiding disc body On be additionally provided with the annular diversion cavity (301c) accommodating corresponding diaphragm (302), each annular diversion cavity (301c) is with corresponding first Flow-guiding channel (301b) turns on；

Each diaphragm (302) includes diaphragm body and is arranged on diaphragm body the second centre bore (302a) for coordinating with mandrel (2) And deviate second flow-guiding channel (302b) of this second centre bore (302a), each diaphragm body include upper diaphragm (3021), Lower diaphragm (3022) and the cavity (3023) being positioned between upper diaphragm (3021) and lower diaphragm (3022), described cavity (3023) Turn on the second centre bore (302a)；

Sealing knot it is respectively equipped with between each upper diaphragm (3021) with the inner edge (301d) of corresponding annular diversion cavity (301c) Structure (6), is respectively equipped with close between each lower diaphragm (3022) with the inner edge (301d) of corresponding annular diversion cavity (301c) Seal structure (6)；

Described mandrel (2) is provided with the flow-guiding structure that the second centre bore (302a) with each diaphragm (302) respectively turns on, institute State flow-guiding structure and the cavity (3023) of each diaphragm (302) and the second centre bore (302a) constitute clean liquid conveying stream (7), Described mandrel (2) and/or cover assembly (4) and/or lower cover component (5) are provided with and carry what stream (7) turned on clean liquid Clean liquid delivery outlet (9)；

First flow-guiding channel (301b) of each flow guiding disc (301) depends on second flow-guiding channel (302b) of each diaphragm (302) Secondary connection constitutes stock solution conveying stream (8), is provided with stock solution delivery outlet (12), in cover assembly (4) on cover assembly (4) Or lower cover component (5) is provided with stock solution input port (11), it is provided with in shell (1) and stock solution delivery outlet (12) is carried with stock solution The first passage of the outfan conducting of stream (8) and by the input of stock solution input port (11) and stock solution conveying stream (8) The second channel of conducting；

It is characterized in that:

Each first centre bore (301a) and the second centre bore (302a) are provided with gap with mandrel (2) matching part respectively, between being somebody's turn to do Gap forms the clean liquid transfer passage (701) as described flow-guiding structure；Described mandrel (2) and/or cover assembly (4) and/or Lower cover component (5) is provided with respectively with outfan and the input of clean liquid delivery outlet (9) of described clean liquid transfer passage (701) The apocenosis passage (10) of end connection.

Membrane filtration module the most according to claim 1, it is characterised in that: described mandrel (2) is tubular structure, mandrel (2) it is provided with the through hole of second centre bore (302a) of each diaphragm (302) with the tube chamber conducting of mandrel (2).

Membrane filtration module the most according to claim 1, it is characterised in that: described mandrel (2) is solid shafting, described row Liquid passage (10) is arranged in cover assembly (4) and/or lower cover component (5).

Membrane filtration module the most according to claim 3, it is characterised in that: first centre bore (301a) of each flow guiding disc (301) Inside being 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) coordinates with described mandrel (2), and described gap is then as the first centre bore (301a) and core The gap of axle (2) matching part.

Membrane filtration module the most according to claim 4, it is characterised in that: the gap between described adjacent lobe (3011) Width be 1 to 3 millimeter.

6. according to the membrane filtration module described in any one claim in claim 1 to 5, it is characterised in that: described upper cover Assembly (4) includes upper flange plate (401) and upper sealing panel (402), lower cover component (5) include 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) quilt Be held between described filtration (3) and lower flange (501), shell (1) be fixed on upper flange plate (401) with under Between ring flange (501)；Described fastening structure includes that many are connected between upper flange plate (401) and lower flange (501) Rod assembly (16), mandrel (2) is connected with upper sealing panel (402) and lower seal plate (502) respectively, mandrel (2) Upper end is upward through upper sealing panel (402) and upper flange plate (401) connects threaded fastening device afterwards；Described upper sealing panel (402) The apocenosis passage (10) that upper setting connects with described clean liquid transfer passage (701), this apocenosis passage (10) is defeated relative to clean liquid Send passage (701) to tilt upward to extend and turn on the clean liquid delivery outlet (9) being arranged on upper flange plate (401)；On described It is additionally provided with stock solution delivery outlet (12) and stock solution input port (11) on ring flange (401), described clean liquid delivery outlet (9), has 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.

Membrane filtration module the most according to claim 6, it is characterised in that: described apocenosis passage (10) and the folder of horizontal plane Angle is that 5 ° to 60 ° directions tilt.

Membrane filtration module the most according to claim 6, it is characterised in that the screw thread of described mandrel (2) upper end is tight It is fixedly mounted with to put and includes preload piece (13) and nut (15)；Described upper preload piece (13) contacts with upper sealing panel (402) and makes This upper sealing panel (402) is pressed between preload piece (13) and described filtration, and described upper preload piece (13) upper end sets Put nut (15)；The through hole that described upper preload piece (13) and upper flange plate (401) coordinate with mandrel (2) is that hole axle coordinates.

Membrane filtration module the most according to claim 1, it is characterised in that: each diaphragm (3021) is RO film or NF film.

10. for the membrane filtration module cover assembly described in claim 6, it is characterised in that: described cover assembly (4) includes Upper flange plate (401) and upper sealing panel (402)；Stock solution delivery outlet (12), stock solution it is provided with on described upper flange plate (401) Input port (11) and coordinate with described mandrel (2) first on coordinate through hole (4011), described upper sealing panel (402) arrange The second through hole (4022) of being connected with second channel by the first through hole (4021) forming first passage and with described mandrel (2) Through hole (4023) is coordinated on second coordinated；Described upper sealing panel (402) is provided with and coordinates through hole (4023) on described second The apocenosis passage (10) of connection, this apocenosis passage (10) inclines in 5 ° to 60 ° directions relative to clean liquid transfer passage (701) Extend obliquely and turn on the clean liquid delivery outlet (9) being arranged on upper flange plate (401).