CN205613290U - Membrane filtering component and lower 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 lower cover subassembly thereof. The problem that has the defect to present conventional membrane filtering component's sealing performance, the utility model discloses a membrane filtering component and lower cover subassembly thereof, this membrane filtering component include dabber, filtration, upper cover subassembly, lower cover subassembly, and wherein, the upper cover subassembly sets up in the upper end of dabber, and the lower cover subassembly sets up in the lower extreme of dabber, and the filtration cup joints and compresses tightly between upper cover subassembly and lower cover subassembly at the spindle and through fastening the structure axial, and the shell setting is the outside of filtration and connect upper cover subassembly and lower cover subassembly respectively, upper cover subassembly and lower cover subassembly and connecting thread fastener are passed respectively with the lower extreme in the dabber upper end. Adopt so two modes of pretension partially, it is right membrane filtering component provides better pretightning force, makes membrane filtering component firm more reliable, also makes membrane filtering component's sealing performance better.

Description

Membrane filtration module and lower cover component 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 group Part includes shell, mandrel, filtration, cover assembly, lower cover component, and cover assembly is arranged at the upper end of mandrel, lower cover group Part is arranged at the lower end of mandrel, and filtration is socketed on mandrel and by fastening structure axial compression in cover assembly and lower cover group Between part, shell is arranged on the outside of filtration and connects cover assembly and lower cover component respectively.Wherein, described filtration It is socketed in the flow guiding disc on mandrel and diaphragm including up to a hundred successively along the axial of mandrel, pacifies between two the most adjacent flow guiding discs Equipped with a diaphragm；Each flow guiding disc includes flow guiding disc body and is arranged on flow guiding disc body the first center for coordinating with mandrel Hole and deviate the first flow-guiding channel of this first centre bore, the side of each flow guiding disc body is additionally provided with the ring accommodating corresponding diaphragm Shape diversion cavity, each annular diversion cavity and the first corresponding flow-guiding channel conducting；Each diaphragm includes diaphragm body and is arranged on diaphragm originally For the second centre bore coordinated with mandrel and the second flow-guiding channel deviateing this second centre bore on body, 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；Each upper diaphragm Be respectively equipped with sealing structure between the inner edge of corresponding annular diversion cavity, the inner circumferential of each lower diaphragm and corresponding annular diversion cavity Sealing structure it is respectively equipped with between Yan；Described mandrel tubular structure, mandrel is provided with the second centre bore of each diaphragm and mandrel The through hole of tube chamber conducting, these through holes, tube chamber and the cavity of each diaphragm and the second centre bore constitute clean liquid conveying stream, 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 of each diaphragm Flow-guiding channel is sequentially communicated composition stock solution conveying stream, is provided with stock solution delivery outlet, in cover assembly or lower cover group on cover assembly Part is provided with stock solution input port, be provided with in shell the first passage of outfan conducting by stock solution delivery outlet and stock solution conveying stream with And the second channel by stock solution input port with the input conducting of stock solution conveying stream.

Publication No. CN103657414A applied for by applicant, entitled " same end Inlet and outlet water separating and filtering film post and feed liquid thereof Reason method " patent documentation (calling list of references in the following text) disclose a kind of membrane filtration module, this membrane filtration module is exactly that stock solution is defeated Entrance and stock solution delivery outlet are simultaneously located on cover assembly, form so-called " with holding Inlet and outlet water "；Additionally, the document also has Body discloses the first passage turned on by stock solution delivery outlet arranged in shell and stock solution is defeated with the outfan of stock solution conveying stream Entrance and stock solution carry the specific configuration of the second channel of the input conducting of stream.

Applicant now intends improving its filter efficiency on the basis of the membrane filtration module of list of references.Can have in the way of employing and one be Increasing the diameter of diaphragm, two are to increase the quantity of flow deflector and diaphragm.But, if the diameter increasing diaphragm will cause single film mistake The floor space of filter assembly increases accordingly, thus causes 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 incite somebody to action Mandrel is designed to double-decker, causes outside diameter of mandrel to significantly increase, thus reduces the effective filtration area of diaphragm, it addition, increase The quantity of 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 film Filter assemblies is by the selection of key parameters several to diaphragm and combination, so that the filter efficiency of membrane filtration module is higher and mistake Filter rejection is unexpected good.Second technical problem to be solved in the utility model is to provide one to improve the output of clean liquid The membrane filtration module of mode and cover assembly thereof, using this clean liquid way of output can be that thickness core is even become by the wall thickness increasing mandrel Create conditions for solid shafting, thus improve the intensity of mandrel.Additionally, the 3rd technical problem to be solved in the utility model is Membrane filtration module and the lower cover component thereof of better tightness between a kind of diaphragm with corresponding flow guiding disc are provided.

For solve 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 In the lower end of mandrel, filtration is socketed on mandrel and by fastening structure axial compression between cover assembly and lower cover component, Shell is arranged on the outside of filtration and connects cover assembly and lower cover component respectively；Described filtration includes several along mandrel Be axially socketed in the flow guiding disc on mandrel and diaphragm successively, between two the most adjacent flow guiding discs, a diaphragm is installed；Respectively Flow guiding disc include flow guiding disc body and be arranged on flow guiding disc body the first centre bore for coordinating with mandrel and deviate this first First flow-guiding channel of centre bore, the side of each flow guiding disc body is additionally provided with the annular diversion cavity accommodating 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 joining with mandrel The second centre bore of closing and deviate the second flow-guiding channel of this second centre bore, each diaphragm body include upper diaphragm, lower diaphragm and Cavity between upper diaphragm and lower diaphragm, described cavity and the conducting of the second centre bore；Each upper diaphragm and corresponding annular water conservancy diversion It is respectively equipped with sealing structure between the inner edge in chamber, is respectively equipped with close between each lower diaphragm with the inner edge of corresponding annular diversion cavity Seal structure；Described mandrel be provided with respectively with the flow-guiding structure of the second centre bore conducting of each diaphragm, described flow-guiding structure and each film The cavity of sheet and the second centre bore constitute clean liquid conveying stream, and described mandrel and/or cover assembly and/or lower cover component are provided with Clean liquid delivery outlet with the conveying stream conducting of clean liquid；First flow-guiding channel of each flow guiding disc is with the second flow-guiding channel of each diaphragm successively Connection constitutes stock solution conveying stream, is provided with stock solution delivery outlet, is provided with stock solution on cover assembly or lower cover component on cover assembly Input port, is provided with the first passage turned on by the outfan of stock solution delivery outlet with stock solution conveying stream and stock solution is inputted in shell Mouth and stock solution carry the second channel of the input conducting of stream；If set individual diaphragm projected area on the cross section of mandrel as If setting individual diaphragm projected area on the cross section of mandrel as A square metre, the external diameter of individual diaphragm is D rice, this membrane filtration Diaphragm quantity in assembly 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), after stock solution input port inputs, passes through second channel Flowing to the arrival end of stock solution conveying stream, stock solution is in this stock solution conveying stream course of conveying, and stock solution is by first on flow guiding disc Flow-guiding channel enters in corresponding annular diversion cavity and part stock solution enters into cavity by the filtration of upper diaphragm, lower diaphragm, passes through Stock solution (or referred to as dope) after process enters first passage, enters stock solution delivery outlet along this passage, flows out this membrane filtration afterwards Assembly.Stock solution after upper diaphragm and lower diaphragm process, the clean liquid that produces in the cavity on diaphragm body (through upper diaphragm or under Liquid after membrane filtration) along this cavity with described second centre bore constitute clean liquid conveying stream by clean liquid delivery outlet discharge this Membrane filtration module.Because each annular diversion cavity with the first corresponding flow-guiding channel conducting, described stock solution conveying stream is and flow guiding disc On annular diversion cavity connection.It is respectively equipped with sealing structure 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 to stop stock solution to the first center Hole and the flowing of the second centre bore direction.Here sealing structure can be sealing ring.

In the middle of implementation process, cracking mouth at flow guiding disc surface or annular diversion cavity end face or annular diversion cavity bottom surface, crack is punished Do not turn up to flow guiding disc two sides, tilt, formed domatic, because filtration includes several being axially socketed in successively along mandrel Flow guiding disc on mandrel and diaphragm, 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.More excellent for one Selection.

Further, described mandrel is solid shafting；The most each first centre bore and the second centre bore set with mandrel matching part respectively Having gap, 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；Institute State cover assembly and/or lower cover component are provided with respectively with outfan and the input of clean liquid delivery outlet of described clean liquid transfer passage The apocenosis passage of end connection.

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 relative to often Significant difference is had for the clean liquid conveying of rule membrane filtration module.The clean liquid conveying of conventional membrane filtration module be by mandrel inside Pipeline transport, or mandrel is set to bimetallic tube (tubulose mandrel or solid core outer shaft sleeve blank pipe) make clean liquid by bimetallic tube defeated Send, the conveying of the clean liquid of these conventional film filter assemblies the most undoubtedly in the case of diaphragm external diameter is fixing, reduce diaphragm at mandrel Cross section on projected area, thus reduce the filter efficiency of membrane filtration module, and membrane filtration module of the present utility model adopted With solid mandrel and be respectively provided with sealing structure between each upper diaphragm with the inner edge of corresponding annular diversion cavity, each lower diaphragm with After being respectively provided with sealing structure between the inner edge of corresponding annular diversion cavity, clean liquid is by the first centre bore on flow guiding disc and film The clean liquid transfer passage conveying that the gap of the second centre bore on sheet and mandrel matching part is formed, clean with conventional film filter assemblies Liquid conveying is compared, in the case of diaphragm external diameter is fixing, because solid mandrel increasing relative to conventional film filter assemblies mandrel Support performance, diaphragm area on the cross section of mandrel is also with respect to increasing, and this most just improves this membrane filtration module Filter efficiency.

Further, in the first centre bore of each flow guiding disc, it is provided with the lobe around this first centre bore circumferential array, adjacent prominent Having gap between tooth, the outside circle of described lobe contacts cooperation with described mandrel, and described gap is then as the first centre bore and core The gap of axle matching part.

Further, the width in the gap between described adjacent lobe is 1 to 3 millimeter.

Arrange lobe i.e. to carry out radially positioning allowing clean liquid can smoothly pass over the first center to filtration by mandrel the most simultaneously Hole, lobe here can be the plate profile structure with rectified action.

This membrane filtration module, through repeated tests and practice, finds 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, and projected area here is not wrapped in this membrane filtration module The cross-sectional area of the second flow-guiding channel including the second centre bore and make stock solution pass through diaphragm, it is found by the applicant that at this projected area and film When ratio between the number product of sheet and the area of a circle constituted with diaphragm external diameter is between 250 to 320, compared to conventional film mistake Filter assembly, the filter efficiency of membrane filtration module and filtration rejection are all significantly improved, produce by membrane filtration module of the present utility model The beyond thought effect of those skilled in the art.

For solve above-mentioned second technical problem, this utility model use the membrane filtration module for above-mentioned membrane filtration module and Cover assembly.

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, and upper sealing panel is held in described filtration with upper Between ring flange, lower seal plate is held between described filtration and lower flange, and shell is fixed on upper flange plate and purgation Between blue dish；Described fastening structure includes the many rod assemblies being connected between upper flange plate and lower flange, mandrel respectively with Upper sealing panel and lower seal plate connect, 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 is relative to clean liquid transfer passage Tilt upward and extend and turn on the clean liquid delivery outlet being arranged on upper flange plate；Stock solution output it is additionally provided with on described upper flange plate Mouth and stock solution input port, described clean liquid delivery outlet, stock solution delivery outlet and stock solution input port are centered around the week of mandrel on upper flange plate Limit is arranged.

Use and the apocenosis passage discharged clean liquid specially is set, not only increase the efficiency collecting clean liquid, but also make mandrel same Make under sample diameter that wall thickness can become is thicker, even makes thick core become solid shafting, makes the pressure performance of this membrane filtration module have significantly Improve.

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, use this clean liquid way of output to be 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 solve above-mentioned 3rd technical problem, this utility model use the membrane filtration module for above-mentioned membrane filtration module and Lower cover component.

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 Add solid and reliable.

Further, the threaded fastening device of described mandrel upper end includes preload piece and nut；The screw thread of described mandrel lower end Clamp device includes lower preload piece and nut；Described upper preload piece lower surface contacts through upper flange plate with the upper surface of upper sealing panel Compressing, described upper preload piece upper end is upward through upper flange plate and arranges nut；Described lower preload piece is integrally provided in lower flange Lower section, 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, lower preload piece here Can be frustum cone structure, the big end of this frustum cone structure contacts with lower flange.Because described sealing structure is arranged at each upper diaphragm with right Between the inner edge of the annular diversion cavity answered and between each lower diaphragm with the inner edge of corresponding annular diversion cavity, lower pretension here The contact area of part and lower flange should be more than the contact area of upper preload piece with upper sealing panel, and the screw thread of such mandrel upper end is tight It is fixedly mounted with pressure that the threaded fastening device put with mandrel lower end the produces concentration to mandrel week edge, the most described shell is provided More preferable pretightning force, the most directly provides more preferable pretightning force, and makes upper diaphragm, the lower diaphragm with right described filtration Sealing property between the inner edge of the annular diversion cavity answered 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 It 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 so-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 Being its 5000 times, therefore, the only mineral ion of hydrone and the useful human body of part can pass through, other impurity and heavy metal Discharged by waste pipe.The process of all desalinizations, and spaceman's waste water recycling device all uses the method, therefore RO film 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 high score Son filters.

NF film is NF membrane, and nanofiltration is a kind of pressure-driven membrane separating process between reverse osmosis and ultrafiltration, NF membrane Pore diameter range is at several ran.Compared with other pressure-driven membrane separating process, occur later.NF membrane is mostly from instead Permeable 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 core The lower end of axle 2, filtration 3 is socketed on mandrel 2 and by fastening structure axial compression in cover assembly 4 and lower cover component Between 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 include several flow guiding disc 301 being axially socketed in successively on mandrel 2 along mandrel 2 and diaphragm 302, lead at the most adjacent two One diaphragm 302 is installed between flow table 301；Each flow guiding disc 301 includes flow guiding disc body and is arranged on flow guiding disc body use In the first centre bore 301a coordinated with mandrel 2 and the first flow-guiding channel 301b deviateing this first centre bore 301a, respectively lead Being additionally provided with annular diversion cavity 301c accommodating corresponding diaphragm 302 on the side of flow table body, each annular diversion cavity 301c is with corresponding First flow-guiding channel 301b conducting；Each diaphragm 302 includes diaphragm body and is arranged on diaphragm body for coordinating with mandrel 2 The second centre bore 302a and deviate the second flow-guiding channel 302b of this second centre bore 302a, each diaphragm body includes film Sheet 3021, lower diaphragm 3022 and the cavity 3023 between upper diaphragm 3021 and lower diaphragm 3022, described cavity 3023 with Second centre bore 302a conducting；Set respectively between each upper diaphragm 3021 with the inner edge 301d of corresponding annular diversion cavity 301c There is sealing structure 6, between each lower diaphragm 3022 and the inner edge 301d of corresponding annular diversion cavity 301c, be respectively equipped with sealing knot Structure 6；Described mandrel 2 be provided with respectively with each diaphragm 302 second centre bore 302a conducting flow-guiding structure, described water conservancy diversion tie Structure constitutes clean liquid conveying stream 7, on described cover assembly 4 with the cavity 3023 and the second centre bore 302a of each diaphragm 302 It 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 each diaphragm 302 The second flow-guiding channel 302b be 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, be provided with and carried with stock solution by stock solution delivery outlet 12 in shell 1 The first passage of the outfan conducting of stream 8 and by stock solution input port 11 and the second of the input conducting of stock solution conveying stream 8 Passage；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 For D rice,

ThenWherein, 250≤B≤320.

Wherein diaphragm projected area on the cross section of mandrel 2 is A square metre, and projected area here is at this membrane filtration module In do 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, applicant Find 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 is 250 Time between 320, compared to conventional film filter assemblies, the membrane filtration module of the present invention is by the filter efficiency of membrane filtration module and mistake Filter rejection all significantly improves, and creates 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, and described diaphragm 302 Preferably shape also should be suitable with the shape of this flow guiding disc 301, and the disc-shaped structure of this flow guiding disc 301 can be that edge is to two Side extends projection, and the tangent plane making this flow guiding disc 301 is I-shaped, the most just forms above-mentioned annular water conservancy diversion on flow guiding disc 301 Chamber 301c.

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 film Sheet 302, the number of flow guiding disc 301 here can be more than 148, and the number of diaphragm 302 can be more than 147, 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, after stock solution input port 11 inputs, flows to stock solution conveying stream 8 by second channel, and stock solution is defeated in this stock solution Sending in stream 8 course of conveying, stock solution enters in described annular diversion cavity 301c, flows 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, along being somebody's turn to do Passage enters stock solution delivery outlet 9, flows out this membrane filtration module afterwards.

Stock solution is after diaphragm 302 processes, and the clean liquid produced in the cavity on diaphragm body is along this cavity 3023 and described second The clean liquid conveying stream 7 that centre bore is constituted discharges this membrane filtration module by clean liquid delivery outlet 9.Because each annular diversion cavity 301c With the first corresponding flow-guiding channel 301b conducting, described stock solution conveying stream 8 is and annular diversion cavity 301c on flow guiding disc 301 Connection.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 hinder Only stock solution flows 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, and diaphragm 302 arranges the breach adaptive with this sealing, and this sealing is formed described First flow-guiding channel 301b, this breach forms described first flow-guiding channel 301b, the most just can realize above-mentioned stock solution conveying stream 8, certainly, stock solution conveying stream 8 is to connect with annular diversion cavity 301c on flow guiding disc 301.

Crack mouth, at crack respectively at flow guiding disc 301 surface or annular diversion cavity 301c end face or annular diversion cavity 301c bottom surface Turn up to flow guiding disc 301 two sides, tilt, formed domatic because filtration 3 include several along mandrel 2 axially the most successively The flow guiding disc 301 being socketed on mandrel 2 and diaphragm 302, so stock solution can carry stream 8 along stock solution, helically move, in figure The direction of arrow is the stock solution direction of motion.

Described mandrel 2 is solid shafting, the most each first centre bore 301a and the second centre bore 302a respectively with mandrel 2 matching part Being provided with gap, 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 be 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, described cover assembly 4 or lower cover component 5 be provided with cloth opening, this cloth opening and described the Port of export connection (concrete structure here can refer to list of references) of two passages, also by stock solution conveying stream 8 and described the One channel connection.After mandrel 2 is set to solid circular shafts, whole membrane filtration module can be brought higher resistance to pressure, this Sample, relative to hollow shaft member, can increase on the basis of the effective filtration area not changing, even expanding filter element The number of filtering element, improves the filtering efficiency of this membrane filtration module.

The lobe 3011 of rich this first centre bore 301a arrangement, phase it is provided with in first centre bore 301a on described flow guiding disc 301 Having gap between adjacent lobe 3011, the outside circle of described lobe 3011 coordinates with described mandrel 2.Lobe 3011 is set To carry out radially positioning allowing clean liquid can smoothly pass over the first centre bore 301a, here to filtration 3 by mandrel 2 the most simultaneously Lobe 3011 can be that there is the plate profile structure about rectification.Having gap between described adjacent lobe 3011 can be 1 to 3 Millimeter.

Described cover assembly 4 includes upper flange plate 401 and upper sealing panel 402, lower cover component 5 include lower flange 501 and under Sealing plate 502；Described filtration 3 is held between described upper sealing panel 402 and lower seal plate 502, upper sealing panel 402 Be held between described filtration 3 and upper flange plate 401, lower seal plate 502 be held in described filtration 3 with under Between ring flange 501, shell 1 is fixed between upper flange plate 401 and lower flange 501；Described fastening structure includes many The rod assembly 16 being connected between upper flange plate 401 and lower flange 501, mandrel 2 respectively with upper sealing panel 402 and under close Shrouding 502 connects, 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 is relative Tilt upward extension in clean liquid transfer passage 701 and turn on the clean liquid delivery outlet 9 being arranged on upper flange plate 401；On described Stock solution delivery outlet 12 and stock solution input port 11, described clean liquid delivery outlet 9, stock solution delivery outlet 12 it is additionally provided with on ring flange 401 The periphery being centered around mandrel 2 with stock solution input port 11 on upper flange plate 401 is arranged.Described apocenosis passage 10 presss from both sides with horizontal plane Angle is 5 to 60 °.The lower end of described mandrel 2 connects screw threads for fastening dress after being passed down through lower seal plate 502 and lower flange 501 Put.

Can arrange on described lower seal plate 502 and connect with described second channel and led to described first by stock solution conveying stream 8 The cloth opening (this cloth opening is the most not shown) of road connection.Described fastening structure includes that many are connected to upper flange plate 401 And the rod assembly 16 between lower flange 501, 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 and upper sealing Plate 402 contacts and makes this upper sealing panel 402 be pressed between preload piece 13 and described filtration 3；Described lower preload piece 14 contact with lower flange and make this lower flange be pressed between lower preload piece 14 and described lower seal plate 502.The most not only Described shell 1 is provided more preferable pretightning force, also directly described filtration 3 is provided more preferable pretightning force.And make Sealing property between upper diaphragm, lower diaphragm with the inner edge of corresponding annular diversion cavity is more preferable.

Specifically, described upper flange plate 401 is provided with on first coordinated with described upper preload piece 13 cooperation through hole 4011, institute State upper sealing panel 402 be provided with constitute first passage the second through hole 4022 of connecting with second channel of the first through hole 4021 and Coordinating through hole 4023 on second coordinated with described mandrel 2, described lower flange 501 is provided with the coordinated with described mandrel 2 Once coordinating through hole 5011, 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 screw thread of described mandrel 2 lower end is tight It is fixedly mounted with to put and includes lower preload piece 14 and nut 15；Described upper preload piece 13 lower surface is through upper flange plate 401 and upper sealing panel 402 Upper surface contact compress, described upper preload piece 13 upper end is upward through upper flange plate 401 and arranges nut 15；Described lower pre- Tight part 14 is integrally provided in the lower section of lower flange 501, and the upper surface of lower preload piece 14 connects with the lower surface of lower flange 501 Pressing tight, described lower preload piece 14 lower end arranges nut 15, uses the mode of such double pretension partially, can be preferably to film mistake Filter assembly provides pretightning force, makes membrane filtration module more solid and reliable.

Claims (7)

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:

Described mandrel (2) top and bottom are each passed through cover assembly (4) and lower cover component (5) and are connected threaded fastening device.

Membrane filtration module the most according to claim 1, it is characterised in that: described cover assembly (4) includes upper flange plate (401) and upper sealing panel (402), lower cover component (5) includes lower seal plate (502) and lower flange (501)；Described mistake Filter structure (3) is held between described upper sealing panel (402) and lower seal plate (502), and upper sealing panel (402) is pressed from both sides Being held between described filtration (3) and upper flange plate (401), lower seal plate (502) is held in described filtration (3) And between lower flange (501), shell (1) is fixed between upper flange plate (401) and lower flange (501)；Described Fastening structure also includes the many rod assemblies (16) being connected between upper flange plate (401) and lower flange (501)；Mandrel (2) being connected with upper sealing panel (402) and lower seal plate (502) respectively, the upper end of mandrel (2) is upward through upper sealing panel And upper flange plate (401) connects threaded fastening device afterwards (402)；The lower end of described mandrel (2) is passed down through lower seal plate (502) Threaded fastening device is connected afterwards with lower flange (501).

Membrane filtration module the most according to claim 2, 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)；The threaded fastening device of described mandrel (2) lower end includes lower preload piece And nut (15) (14)；Described upper preload piece (13) lower surface is through upper flange plate (401) and upper sealing panel (402) Upper surface contact compresses, and described upper preload piece (13) upper end is upward through upper flange plate (401) and arranges nut (15)；Institute State lower preload piece (14) and be integrally provided in the lower section of lower flange (501), the upper surface of lower preload piece (14) and lower flange (501) lower surface contact compresses, and described lower preload piece (14) lower end arranges nut (15).

Membrane filtration module the most according to claim 3, it is characterised in that: described lower preload piece (14) and lower flange (501) Contact area more than the contact area of upper preload piece (13) and upper sealing panel (402).

Membrane filtration module the most according to claim 3, it is characterised in that: described upper preload piece (13) is multidiameter knot Structure, this big end of multidiameter structure contacts with upper sealing panel (402).

Membrane filtration module the most according to claim 3, it is characterised in that: described lower preload piece (14) is frustum cone structure, The big end of this frustum cone structure contacts with lower flange (501).

7. for the membrane filtration module lower cover component described in claim 2, it is characterised in that this lower cover component includes lower seal plate And lower flange (501) (502)；Described lower flange (501) is provided with the first time cooperation coordinated with described mandrel (2) Through hole (5011), described lower seal plate (502) is provided with second time cooperation through hole (5021) coordinated with described mandrel (2).