CN1254614A

CN1254614A - Plate frame type membrane assembly using comb-type membrane frame

Info

Publication number: CN1254614A
Application number: CN 99126357
Authority: CN
Inventors: 蒋维钧; 李继定; 陈翠仙; 余立新
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 1999-12-17
Filing date: 1999-12-17
Publication date: 2000-05-31
Anticipated expiration: 2019-12-17
Also published as: CN1101251C

Abstract

A plate frame type membrane assembly using comb-type membrane frame is sequentially composed of supporting plate, membrane, membrane frame, membrane and supporting plate, which are overlapped. Said membrane frame is comb type and consists of frame plates, pressing piece and pad. Its raw material inlet and material outlet are radically improved. Its advantages are simple structure, use of metallic or plastic sheets, small size, large membrane area, and low cost.

Description

Adopt the plate and frame module of comb-type membrane frame

The present invention relates to a kind of plate and frame module that is used for the employing comb-type membrane frame of processes such as infiltration evaporation, micro-filtration, ultrafiltration, nanofiltration and counter-infiltration, belong to the membrane separation technique field.

Plate and frame module is that the film separation process comprises that infiltration evaporation, micro-filtration, ultrafiltration, nanofiltration, counter-infiltration etc. separate a class common equipment of process, its basic building block is film frame and gripper shoe, usually, the unit of a film frame and an assembly of a gripper shoe formation, the film that plays centrifugation is clipped between film frame and the gripper shoe, and a plate and frame module is formed in several unit.The effect of film frame is that processed feed liquid is sent in the frame from the feed liquid sprue of membrane module, and the surface of the film of flowing through, experience certain centrifugation after, in frame, flow out.The effect of gripper shoe is a support membrane, and collects the material (liquid or gas) that sees through film, flows out from membrane module then.The quality of film mount structure has decisive influence for separating effect, cost and the economic benefit of membrane module.So far at the film frame that multiple structure is arranged of industrial application, for example Sweden DDS company is used for the plate and frame module of ultrafiltration and counter-infiltration, Germany GFT company is used for the plate and frame module of infiltration evaporation, but their common feature is a feed liquid enters big film frame space from a little feed liquid mouth, flow out from a little discharging opening then, the common drawback of this class film frame is: (1) feed liquid enters big frame by osculum, causes feed liquid skewness in frame; (2) the flow through resistance of osculum of feed liquid is big; (3) film mount structure complexity, the thickness of frame is big, and processing is big with the assembling difficulty.

The plate and frame module that is used for the infiltration evaporation process (hereinafter to be referred as the JVP assembly) (Chinese patent application 98100833.X) of the applicant's invention, the film mount structure has been done improvement, improved liquid flowing in the film frame, but this film frame is put together by two or three, processed complex, the material restricted (welding when being subjected to amalgamation is limit) that uses, the cost height, and also the thickness of frame is big.

The objective of the invention is to design a kind of plate and frame module that adopts comb-type membrane frame, the structure of prior art made improvements, it with the film frame of plate and frame module commonly used at present relatively, the charging and the discharging duct of fundamentally having improved the film frame.

The plate and frame module of the employing comb-type membrane frame of the present invention's design, this membrane module is overrided to form successively mutually by gripper shoe, film, film frame, film, gripper shoe, the film frame is a comb-type membrane frame, this film frame is made up of deckle board, clamping piece and pad, thick 0.5～the 3mm of described deckle board, the two ends of deckle board are the broach shape, clamping piece places the nose of comb both sides, constitute the passage that feed liquid enters the film frame, the facewidth n=2 of broach～3mm, the wide m=2～5mm of between cog, pad is a hollow shape, upper and lower end has the fluid passage, and spacer thickness is 0.8～2mm, and clamping piece is thick to be 0.2～0.5mm.

The used deckle board of the present invention has the aperture that diameter is 1～2mm all around, or wide 1～1.5mm, the ditch of dark 0.5mm.Open on the used clamping piece at diameter is the aperture of 1～2mm.Used pad is a hollow shape, and the upper end has the fluid passage, and upper and lower end is provided with clamping piece simultaneously.

Above-mentioned pad has two kinds, and straight-through pad and baffling pad when feed liquid need repeatedly be flowed through the film frame, can use the membrane module that is mixed the tandem compound of forming by straight-through pad and baffling pad, and pad is made up of the elastomeric material of 0.8～2mm.

Membrane module of the present invention has fundamentally improved the charging and the discharging duct of film frame, compare with the JPV membrane module, simplify the structure, can make with the thin plate of multiple materials such as plastics and metal, processing is simple, and cost is low, and the thickness of frame is little, can reduce the volume of membrane module, increase the membrane area in the elementary membrane assembly volume.

Description of drawings:

Fig. 1 is the profile of membrane module of the present invention.

Fig. 2 is the structural representation of comb-type membrane frame of the present invention.

Fig. 3 is the structural representation of the deckle board of comb-type membrane frame in the assembly of the present invention.

Fig. 4 is the structural representation of comb-type membrane frame Intermediate gasket, and Fig. 4 b is A-A, the B-B sectional drawing of Fig. 4 a.

Fig. 5 is the structural representation of comb-type membrane frame clamping piece.

Fig. 6 is the membrane module structure schematic diagram of tandem compound.

Fig. 7 is the structural representation of pad used in the membrane module of tandem compound.Fig. 7 b is the side view of Fig. 7 a.

Introduce content of the present invention below in detail.

Among Fig. 1～Fig. 7, the 1st, film frame, the 2nd, gripper shoe, the 3rd, deckle board, the 4th, pad, the 5th, clamping piece, the 6th, film, the 7th, pad, the 8th, clamping piece, the 9th, sprue, the 10th, film frame passage, the 11st, baffling film frame, the 12nd, the aperture around the deckle board, the 13rd, the aperture on the clamping piece, the 14th, the ditch on deckle board limit.

The film frame of the present invention's design is made up of deckle board, clamping piece and pad, and Fig. 1 is the profile of the membrane module of film frame 1 and gripper shoe 2 formations, and Fig. 2 is the front view of film frame, and Fig. 3, Fig. 4, Fig. 5 are respectively deckle board 3, pad 4 and clamping piece 5.The broach that two clamping pieces are clamped deckle board constitutes feed liquid enters the film frame from sprue passage.As shown in Figure 1, feed liquid enters the film frame from the sprue 9 of the membrane module path 10 by the film frame, parallel flow through the film frame and contact with face 6, the thing that sees through by film flows out (gripper shoe can use various forms) by gripper shoe 2, and seepage remaining liquid is through film frame path 10 and by sprue 9 outflows.When feed liquid need repeatedly be passed through the film frame, can adopt the membrane module of tandem compound as shown in Figure 6.The characteristics of this structure are with a baffling film frame 11, form barrier on sprue, and feed liquid is flowed through behind the film frame, can continue to enter next film frame.The difference of baffling film frame and film frame (can be called direct current film frame) shown in Figure 1 is that its uses baffling pad 7 (as shown in Figure 7) and baffling clamping piece 8 accordingly.

Sheet frame 3 is made by the uniform thin plate of thickness, can be with metal or plastics, and the facewidth 2～3mm on the deckle board, the wide 2～5mm of two between cog, tooth length is decided according to the size of deckle board, and deckle board is big, and tooth is long, is generally 30～50mm.Deckle board thickness is got 0.5～3mm according to technological requirement.When the operating pressure of separation process is higher, in order to prevent that pad from moving, around sheet frame, according to the height of operating pressure, open aperture or wide 1～1.5mm that the anti-pad about diameter 2mm moves, the ditch of dark 0.5mm, pitch of holes is decided according to the operating pressure size, the pressure height, spacing is little, is generally 20～50mm.

Pad 4 and 7 is made by elastomeric material, thick 0.8～2mm.Clamping piece 5 and 8 is made by the stainless steel thin slice, and thickness 0.2～0.5mm also can open the aperture about diameter 2mm in case of necessity on the clamping piece.

Embodiments of the invention:

The stainless steel deckle board, the long 500mm of appearance and size, wide 250mm, thickness of slab 1.5mm, facewidth 2mm, the wide 3mm of between cog, the thick 0.3mm of clamping piece, the thick 1.2mm of pad.

Claims

1, a kind of plate and frame module that adopts comb-type membrane frame, this membrane module is by gripper shoe, film, the film frame, film, gripper shoe is overrided to form successively mutually, it is characterized in that, wherein said film frame is a comb-type membrane frame, this film frame is by deckle board, clamping piece and pad are formed, thick 0.5～the 3mm of described deckle board, the two ends of deckle board are the broach shape, and clamping piece places the nose of comb both sides, constitute the passage that feed liquid enters the film frame, the facewidth n=2 of broach～3mm, wide m=2～the 5mm of between cog, pad are hollow shape, on, the lower end has the fluid passage, spacer thickness is 0.8～2mm, and clamping piece is thick to be 0.2～0.5mm.

2, membrane module as claimed in claim 1 is characterized in that, has the aperture that diameter is 1～2mm around the wherein said deckle board, or wide 1～1.5mm, the ditch of dark 0.5mm.

3, membrane module as claimed in claim 1 is characterized in that, opening on the wherein said clamping piece at diameter is the aperture of 1～2mm.

4, membrane module as claimed in claim 1 is characterized in that, wherein said pad is a hollow shape, and the upper end has the fluid passage, and upper and lower end is provided with clamping piece simultaneously.