CN1895755A - Membrane separation device and membrane separation method - Google Patents

Abstract

A membrane separation device and a membrane separation method, where membrane clogging is less probable to occur, membrane separation can be conducted even when water to be processed has a relatively slower flow speed, membrane filling efficiency is excellent, and foreign objects are less likely to accumulate in the device. The device has vessel-like inner casings in series in a pressure container having an inlet for water to be treated at one end and a concentration water outlet at the other end. Flow straightening plates are placed on the side of the inlet for water to be processed of the pressure container, a large number of membrane separation elements are stacked in each inner casing, and spacers that serve also as seal members are placed between adjacent membrane separation elements. A through hole is so formed as to penetrate through the membrane separation elements including the spacers from one side to the other side of the stacked membrane separation elements. Permeated-water discharge passages are formed in a length direction in each inner casing. The through hole is in communication with the permeated water discharge passages, and water to be processed that is introduced into the pressure container through the flow straightening plate permeates through the membrane separation elements and is discharged to the outside through the through hole and the permeated-water discharge passages.

Description

Membrane separation device and membrane separating method

June 30 in 2004), denomination of invention divides an application for the patent application of " membrane separation device and membrane separating method " the application is that application number is 03801917.5 (international application no is PCT/JP2003/005974), the applying date to be (to enter State Period date: on May 14th, 2003.

Technical field

Membrane separation device and the membrane separating method the present invention relates to be used in Separation of Solid and Liquid, remove ion, remove dissolved organic matter, (mixing water treatment), the assorted wastewater treatment of boats and ships being handled in cabosil draining processing, latex draining processings, various liquid waste processing, tap water filter, active sludge treatment, food draining processing, living drainage, the flat membranous type of aspects such as COD, reduction BOD, filter back washing draining processing, printing coatings draining processing is handled, reduced to ight soil.

Background technology

For the liquid (processed water) that will dissolve or be mixed with various materials in water is separated into the water (permeate water) of cleaning and the condensed water of high concentration, and used membrane separation device.Various film unpack formats is arranged in membrane separation device, and for example, the film separation of carrying out in crossing current (Network ロ ス Off ロ one) mode is widely used.In this crossing current mode, for example have: shown in Figure 11 (a), by supply pump 42 with processed water to membrane module 41 force feeds with the permeate water of being separated into and condensed water function, permeate water is taken out from membrane module 41 via path 43, condensed water is taken out from membrane module 41 via path 44, this condensed water turns back to membrane module 41 via path 45, circulating pump 46 again, afterwards, thereby make condensed water via path 44, the mode that circulates for more than 45 time enrichment is increased; And shown in Figure 11 (b), to be accumulated in processed water in the processed water accumulating tank by supply pump 48 delivery film assemblies 41, permeate water is taken out from membrane module 41 via path 49, condensed water is turned back to accumulating tank 47 via path 50,51, again by supply pump 48 with the processed water delivery film assembly 41 in the accumulating tank, afterwards, thus make condensed water via path 50, the mode that circulates for more than 51 time enrichment is increased., if membrane module is classified, following a few class is arranged then according to the form of present employed assembly.

(1) its structure of macaroni yarn type assembly is that the hollow tow that external diameter is about 500～1500 μ m is become a branch of, though the membrane area of each unit volume is very big, narrow runner easily stops up, need clean and only limit to cleaner shortcomings such as former water continually in the macaroni yarn but exist, and therefore needs accurate pre-treatment.

(2) the convoluted assembly of helical is that film and spacer helically are wrapped in assembly around the collector pipe of center, mostly be this assembly is placed in the pressure vessel collector pipe in another connection, and with the many structures that are connected in series and use.Though can obtain the film of big membrane area compactly, and the macaroni yarn assembly exists the susceptible to plugging shortcoming of runner equally.

(3) cast assembly structure be with tens of internal diameter for the inner face of the stay pipe of number mm～number 10mm or outside be equipped with film, length is that pipe about about 3m concentrates in together, having the pipe inner flow passage is difficult for stopping up, can obtain the such advantage of flow velocity of bigger treatment fluid, but compare the shortcoming that the numerical value that exists the film filling rate is little, the film charging efficiency is low with above-mentioned two kinds of assemblies.

In addition, in the special fair 3-18490 communique of Japan, disclose as Figure 12 and the double device that separates of filtration shown in Figure 13.In Figure 12,13, outside housing 61, one ends of tubulose were shut by the semicircular end 62, and the other end is by lid 63 sealings.On lid 63, offer the outlet of former water inlet connecting portion 64, brine outlet connecting portion 65 and penetrant discharge pipe 66 usefulness.In the side body 61, front and back one after the other dispose interior side body 67,67 outside, in each in the side body 67, are filled with the laminated body of barrier film cushion pad 68 and are configured in spacer 69 between this barrier film cushion pad 68,68.In addition, tubular bolt 70 runs through the laminated body of barrier film cushion pad 68, is equipped with a plurality of radial directions hole 71 on this tubular bolt 70.According to the filter of being put down in writing in this special permission communique, flow into former water in the housing 61 of the outside from inlet connecting portion 64, be penetrated in the barrier film cushion pad 68, penetrant is in the 71 inflow tubular bolts 70 of radial direction hole, and, discharge via penetrant discharge pipe 66, the opposing party, non-penetrant is discharged from brine outlet connecting portion 65.

But in the filter that this special permission communique is put down in writing, existing shortcoming is, because of the runner of processed liquid long, so the pressure loss is big; And then because between the interior side body 67,67 of front and back, have gap 72, so pile up foreign matter easily in this part.

The present invention makes in view of existing problem points in the technology in the past, has film and is difficult for stopping up that the velocity ratio of processed water lessly also can carry out film separations, film charging efficiency excellence, the membrane separation device and the membrane separating method of feature such as difficult accumulation foreign matter in device even purpose is to provide a kind of.

Summary of the invention

To achieve these goals, the present invention is owing to possess the pressure vessel that disposes cowling panel at the processed water entrance side, be configured in a plurality of interior side body in this pressure vessel and be layered in the film resolution element in side body in this, form through hole in the mode that connects the film resolution element, the edge vertically forms the permeate water drain passageway on interior side body, and above-mentioned through hole is communicated with the permeate water drain passageway, therefore, can make through cowling panel and the processed water that is directed to pressure vessel in is penetrated in the film resolution element, be discharged to the outside through through hole and the permeate water drain passageway that is located on the interior side body again.

In addition, the invention is characterized in, possess pressure vessel with processed water inlet and condensed water outlet, be located at the interior side body in the aforementioned pressure container and be located at aforementioned in film resolution element group in the side body; Aforementioned films resolution element group is by with a plurality of film resolution elements be located at that liner between the aforementioned films resolution element is stacked to be constituted, and is formed with through hole like that on the aforementioned films resolution element with what connect aforementioned films resolution element and aforementioned liner; The aforementioned through hole that forms on aforementioned films resolution element group is communicated with the permeate water drain passageway that forms on the side body in aforementioned; The processed water that is directed in the aforementioned pressure container is penetrated in the aforementioned films resolution element, is discharged to the outside through aforementioned through hole and aforementioned permeate water drain passageway again.

Moreover, in membrane separation device of the present invention, preferably its structure in the aforementioned pressure container, be provided with a plurality of in side body, and adjacent aforementioned in the interior aforementioned films resolution element group of side body press close to mutually.

According to this preferred construction, owing to aforementioned films resolution element group is pressed close to respectively mutually, so can not form gap such shown in the conventional art.Thereby, according to this structure, can solve " accumulation of foreign matter " such problem in the past of gap portion.

In addition, in membrane separation device of the present invention, preferred construction is the 5 layer structure of aforementioned films resolution element for keeping body, gripper shoe, interval to keep body, permeability film stacked above one another to form with the permeability film, at interval, and with a square end portion link to each other with aforementioned through hole like that, at least one otch is set on aforementioned gripper shoe.

According to this preferred construction, because aforementioned gripper shoe is provided with the aforementioned otch that is communicated with (joining) with aforementioned through hole, so the liquid that is penetrated in the aforementioned films resolution element can be carried to the permeate water drain passageway effectively via aforementioned otch and aforementioned through hole.In other words,, can reduce the pressure loss of permeate water, and can guarantee that permeate water flows into aforementioned through hole smoothly by aforementioned otch is set.

Moreover in membrane separation device of the present invention, preferred construction is the outside that the opposing party end of aforementioned otch is arranged on the view field of the aforementioned liner on the aforementioned gripper shoe.

According to this preferred construction, even if aforementioned films resolution element and aforementioned liner by situation closely stacked together under, because the opposing party end of aforementioned otch is arranged on the outside of the view field of the aforementioned liner on the aforementioned gripper shoe, so guaranteed to be penetrated into the inflow path of the liquid in the aforementioned films resolution element, and can implement the conveying (via the conveying of aforementioned permeate water drain passageway) of permeate water more satisfactoryly via aforementioned otch etc.

In addition, in membrane separation device of the present invention, preferred construction is for being provided with a plurality of film resolution element groups in the side body in aforementioned.

According to this preferred construction, owing in aforementioned, be provided with a plurality of film resolution element groups in the side body, so, can implement than more jumbo processing in the past with respect to area is set.

And then in membrane separation device of the present invention, preferred construction is that adjacent aforementioned films resolution element group quilt angle in accordance with regulations disposes obliquely.Particularly, more preferably adjacent film resolution element group is provided with in the mode that is orthogonal substantially.

According to this preferred construction, by with (for example quadrature the like that) configuration obliquely of adjacent aforementioned films resolution element group angle in accordance with regulations, the easy turbulization of the current of aforementioned processed water is so can suppress the accumulation to the film surface (aforementioned permeability film surface) of aforementioned films resolution element such as outstanding absurd creature matter.If it is aforementioned films resolution element group is provided with in the mode that is orthogonal substantially,, therefore desirable more then because the turbulence effects of aforementioned processed water reaches maximum.

Moreover, though " predetermined angular " is not specially limited, considers and the balance of the pressure loss etc., can be compared to 0 ° big most, for example, preferably about 10 °～90 °.

In addition, in membrane separation device of the present invention, preferred construction is for being provided with cowling panel at the processed water entrance side of aforementioned pressure container, and aforementioned cowling panel is provided with in the mode that is orthogonal substantially with adjacent film resolution element group.

According to this preferred construction, because between aforementioned cowling panel and aforementioned films resolution element group, the current of aforementioned processed water are easy to turbulization, so with similarly above-mentioned, can suppress the accumulation to the film surface (aforementioned permeability film surface) of aforementioned films resolution element such as outstanding absurd creature matter.

And then, in the present invention, also can replace above-mentioned interior side body, but be fixed with a plurality of film resolution elements of clamping and have be formed on film resolution element group on the water collecting part of the permeate water drain passageway that is connected of through hole constitute membrane separation device.

Specifically, membrane separation device of the present invention can constitute by following feature: possess pressure vessel with processed water inlet and condensed water outlet, be located at water collecting part in the aforementioned pressure container and the film resolution element group that is being kept by aforementioned water collecting part clamping; Aforementioned films resolution element group is formed with through hole in the mode that connects aforementioned films resolution element and aforementioned liner by with a plurality of film resolution elements be located at that liner between the aforementioned films resolution element is stacked to be constituted on the aforementioned films resolution element; The aforementioned through hole that forms on aforementioned films resolution element group is connected with the permeate water drain passageway that forms on aforementioned water collecting part; The processed water that is directed in the aforementioned pressure container is penetrated in the aforementioned films resolution element, is discharged to the outside through aforementioned through hole and aforementioned permeate water drain passageway again.

In addition, in this membrane separation device, preferably its structure be aforementioned films resolution element group by a pair of water collecting part clamping, and the aforementioned a pair of water collecting part device that is fixed is fixed.

And then, in this membrane separation device, be preferably with plate-shaped member and constitute aforementioned water collecting part.

In addition, membrane separating method of the present invention has following feature, possess pressure vessel with processed water inlet and condensed water outlet, be located at the interior side body in the aforementioned pressure container and be located at aforementioned in film resolution element group in the side body; Aforementioned films resolution element group is formed with through hole in the mode that connects aforementioned films resolution element and aforementioned liner by with a plurality of film resolution elements be located at that liner between the aforementioned films resolution element is stacked to be constituted on the aforementioned films resolution element; The permeate water drain passageway that forms on the aforementioned through hole that forms on the aforementioned films resolution element group and side body in aforementioned is communicated with; Make processed being penetrated in the aforementioned films resolution element that is directed in the aforementioned pressure container, discharge to the outside through aforementioned through hole and aforementioned permeate water drain passageway again.

And then the membrane separating method among the present invention has following feature, possesses pressure vessel with processed water inlet and condensed water outlet, is located at water collecting part in the aforementioned pressure container and the film resolution element group that is being kept by aforementioned water collecting part clamping; Aforementioned films resolution element group is formed with through hole in the mode that connects aforementioned films resolution element and aforementioned liner by with a plurality of film resolution elements be located at that liner between the aforementioned films resolution element is stacked to be constituted on the aforementioned films resolution element; The aforementioned through hole that forms on aforementioned films resolution element group is connected with the permeate water drain passageway that forms on aforementioned water collecting part; The processed water that is directed in the aforementioned pressure container is penetrated in the aforementioned films resolution element, discharges to the outside through aforementioned through hole and aforementioned permeate water drain passageway again.

Description of drawings

Fig. 1 is the side view of pressure vessel of the present invention.

Fig. 2 is the stereogram after side body in of the present invention is decomposed up and down.

Fig. 3 is the skeleton diagram of pressure vessel of the present invention, and Fig. 3 (a) is that the profile of an embodiment of pressure vessel of the present invention, front elevation, Fig. 3 (c) that Fig. 3 (b) is entrance side are that the C-C of presentation graphs 3 (d) is profile from the amplification profile of the D-D of Fig. 3 (a) to the cowling panel of looking section to the part of the cowling panel of looking section, Fig. 3 (d).

Fig. 4 is that the laminated body that will be made up of a plurality of film resolution elements is decomposed stereogram afterwards.

Fig. 5 be of the present invention in the skeleton diagram of side body, Fig. 5 (a) is the exploded perspective view to the linking method of the Lower Half of dividing and film resolution element of side body in the explanation, Fig. 5 (b) is the plane of conduit.

Fig. 6 is the profile of film resolution element.

Fig. 7 is the skeleton diagram of film resolution element, and Fig. 7 (a) is the plane that is illustrated in an example of the otch that forms around the through hole of gripper shoe of film resolution element, and Fig. 7 (b) is the VII-VII line profile of Fig. 7 (a).

Fig. 8 is the skeleton diagram of film resolution element, and Fig. 8 (a) is another the routine plane that is illustrated in the otch that forms around the through hole of gripper shoe of film resolution element, and Fig. 8 (b) is the VIII-VIII line profile of Fig. 8 (a).

Fig. 9 is the figure that flows of explanation back washing.

Figure 10 is the figure of expression because of the variation example of the intermembranous pressure reduction that back washing produced.

Figure 11 (Figure 11 (a) and (b)) is the general flowchart of cross-flow type film separation circuit.

Figure 12 is the longitudinal sectional drawing of membrane separation device in the past.

Figure 13 is the XIII-XIII line profile of Figure 12.

Figure 14 is the summary section of the membrane separation device of other embodiment of the present invention.

Figure 15 is the skeleton diagram of the membrane separation device of other embodiment of the present invention, Figure 15 (a) is arranged on the summary lateral view of the interior side body in the pressure vessel, the summary lateral view of the film resolution element group in Figure 15 (b) is arranged in the side body, Figure 15 (c) be Figure 15 (a) the arrow C direction to view.

Figure 16 is the skeleton diagram of the membrane separation device of other embodiment of the present invention, Figure 16 (a) is the summary section of the membrane separation device of other embodiment of the present invention, Figure 16 (b) be the B-B of Figure 16 (a) to the summary section of looking section, Figure 16 (c) is that the C-C of Figure 16 (a) is to the summary section of looking section.

The best example that is used to invent

That is, purport of the present invention is a feature with following content: at one end side has in processed water inlet, another distolateral pressure vessel with condensed water outlet, front and back one after the other dispose a plurality of in side bodies; Processed water entrance side at this pressure vessel is equipped with cowling panel; Folded multilayer film resolution element in side body middle level and between adjacent film resolution element, be equipped with the liner of double as encapsulant in each; To comprise that to opposite side the mode that the film resolution element of liner connects forms through hole with a side from stacked film resolution element; The edge vertically forms the permeate water drain passageway on the side body in each; Above-mentioned through hole is communicated with the permeate water drain passageway, the processed water that is directed in the pressure vessel via above-mentioned cowling panel is permeated in the film resolution element, be discharged to the outside via through hole and permeate water drain passageway again.

According to the present invention, owing to be furnished with cowling panel at the processed water entrance side of pressure vessel, so import to the interior processed water of container by rectification, bias current can not take place, therefore can relatively improve the flow velocity of processed water.Though flow velocity depends on the kind and the proterties of processed water, but can obtain the flow velocity of 0.5～2.0m/sec.If not enough 0.5m/sec then can not get the flow velocity of sufficient permeate water; Surpass 2m/sec, then inefficent on energy.In the present invention, even if do not adopt with the method in the pressurized processed water supply pressure container, also can be by permeate water being discharged side is reduced to negative pressure (0.1Mpa or its following) thus and processed water imported carry out film in the pressure vessel and separate.Under living drainage is handled (reverse osmosis membrane), latex draining and filter back washing draining situations such as (milipore filters), more satisfactory with pressuring method is supplied with processed water in pressure vessel method; Under the situation of high concentration sludge (for example activated sludge) of a part etc., the method that processed water imports in the pressure vessel is more satisfactory with negative pressure mode.

Be directed to the processed water in the pressure vessel via cowling panel, be penetrated in the film resolution element, permeate water drain passageway on the side body is discharged to the outside via through hole and in being located at again, and in through hole is inserted with conduit, and vertically be formed with the permeate water drain tank at above-mentioned conduit upper edge conduit.This permeate water drain tank is formed on the outside of conduit.And, though in this following example (and each embodiment), as inserting the parts that form the permeate water drain tank in the through hole, the situation that adopts " conduit " is illustrated, but the present invention is not limited only to this structure, as required, also can replace conduit with " solid bar ".Under the situation of this use solid bar, along vertical formation permeate water drain tank of solid bar outside.

This conduit in the function that has as the permeate water runner, also has the fixedly function of film resolution element, and the device of simply constructed discharge permeate water can be provided.By the permeate water drain tank that forms on conduit, permeate water is easier to flow, and can be controlled at the unnecessary pressure loss that the permeate water side produces.This permeate water drain tank in order to prevent just to be stopped up by foreign matter at short notice, preferably is set as 0.5～1.0mm * 0.5～1.0mm (d of Fig. 5 (b) ₁* d ₂) the cross section of size.In addition, this permeate water drain tank preferably is provided with one or more than it, it is then better that many (for example 2～8) all equally spaced are set.

The pressure vessel of the length of interior side body and a plurality of film resolution elements is same length longitudinally, and it is optimal not having substantial gap between the film resolution element in the interior side body of adjacency.This is that outstanding absurd creature matter just can not be deposited in this part because if very close to each other between the interior side body that one after the other disposes in front and back.

In addition, in this example, though internally side body (film resolution element (film resolution element group) sets portion) is illustrated with the situation of the same length longitudinally of film resolution element (film resolution element group), the present invention is not limited only to this formation, so long as between adjacent film resolution element (film resolution element group), do not have substantial gap, then in the length longitudinally of side body and film resolution element identical or inequality can.

The film resolution element is rectangular flat membranaceous, and more than or equal to 1 smaller or equal to 3, through hole preferably is positioned on 2 bisectors of minor face to the ratio of minor face on long limit.That is to say, when long limit surpasses 3 to the ratio of minor face, then be difficult to make the film resolution element by melting of being undertaken by ultrasonic wave etc., even if this be because can access long limit to the ratio of minor face 3 or film resolution element more than it, also can become the very little element of membrane area; By through hole is positioned on 2 bisectors of minor face, can make permeate water collect in the through hole place equably.So, if the film resolution element is rectangular flat membranaceous, long limit to the ratio of minor face 1 or its above 3 or below it, and through hole is positioned on 2 bisectors of minor face, will obtain is also such effect easily of making (cut off, melting) of flat film and film resolution element that can back washing.In addition, on 2 bisectors that through hole are configured in minor face, can realization have obtained the compiling of processing water of balance.

Be preferably the 5 layer structure of film resolution element, near the above-mentioned gripper shoe the through hole, towards at least 1 otch of through hole setting for keeping body, gripper shoe, interval to keep body, permeability film stacked above one another to form with the permeability film, at interval.Permeate water in the film resolution element, infiltration as the permeability film and keep at interval body play permeate water runner (drain passage) effect draining cloth (nonwoven etc.) and arrive the through hole that runs through the film resolution element, but because between the film resolution element of adjacency, dispose the liner of double as encapsulant, so, owing to, therefore stoped from of the inflow smoothly of film resolution element to the permeate water of through hole by the liner institute cramping of clamping film resolution element about oneself.Therefore,,, just can reduce the pressure loss that is penetrated into the permeate water in the film resolution element, guarantee that permeate water flows to through hole smoothly towards at least 1 otch of through hole setting if near the gripper shoe the through hole.

The permeability film can adopt secondary filter film, milipore filter, Nano Filtration film or reverse osmosis membrane.Like this, owing to can change the kind of permeability film according to purposes, so have the effect that can adapt to various uses.

In addition,, the processed water of 2 phase fluid states is imported in the pressure vessel, then preferably can expect and realize the cleaning performance (preventing the effect that film stops up) of film resolution element by being blended into gas in the processed water if gas is sneaked in the processed water.As this gas, can use air or nitrogen.

In addition, not constantly air to be sneaked in the processed water but the situation of entrained gas is also passable discontinuously.For example, by about 1 day 1 time forced air is sneaked in the processed water, can expect and stir the outstanding such effect of absurd creature by what bubble brought, the film of film resolution element just is not easy to stop up.

And then, discharge in the side feeding container from the permeate water of pressure vessel by back washing water that will pressurize or the back washing water of having sneaked into gas, the outstanding absurd creature attached to the film surface can be peeled off.In addition, can adopt permeate water for back washing water.The pressure of back washing water is preferably at 0.05～0.2Mpa, more preferably at 0.05～0.1Mpa.The anxiety of film breakage is just arranged more than 0.2Mpa, and in 0.05～0.1Mpa, just can access sufficient cleaning performance.

In addition, the membrane separation device in this example can use in filter types such as crossing current mode, end stream mode.

Embodiment

Followingly embodiments of the invention are described with reference to accompanying drawing.Fig. 1 one distolaterally has processed water inlet 1, another distolateral stereogram with pressure vessel 3 of condensed water outlet 2.In pressure vessel 3, front and back one after the other dispose a plurality of as shown in Figure 2 by the interior side body 6 of the groove shape that constitutes to the first half 4 that divides with to the Lower Half 5 of dividing.

Shown in Fig. 3 (a), be provided with cowling panel 7 in the processed water of pressure vessel 31 side that enters the mouth.Cowling panel 7 is that the enter the mouth circular open portion of 1 side of processed water at pressure vessel 3 will be the plate body 8 that broach shape ground is provided with at certain intervals and be configured to the device that 2 row form shown in Fig. 3 (b).As the D-D of Fig. 3 (a) to shown in enlarged drawing Fig. 3 of the cowling panel 7 of looking section (d), the length L of plate body 8 ₂Be 30～60mm, be preferably 40～50mm.In addition, to shown in figure Fig. 3 of the part of the cowling panel 7 of looking section (c), the size of the section of plate body 8 is: d as the C-C of presentation graphs 3 (d) ₁Be 1～10mm, be preferably 2～5mm; In addition, d ₂Be 5～20mm, be preferably 7～15mm.And, the interval L of adjacent plate body 8,8 ₁Be 5～20mm, be preferably 7～10mm.Like this,, the entrance side of the basic the same ground of processed water in pressure vessel can be distributed, and import in the container with the state of rectification simultaneously by cowling panel being configured to 2 row.

As shown in Figure 2, in each, in the side body 6, be laminated with a plurality of film resolution elements 9.In addition, as shown in Figure 4, between adjacent film resolution element 9,9, dispose the liner 10 of double as encapsulant.

Shown in Fig. 3 (a),, comprise liner and be formed with through hole 11 like that to opposite side from a side of stacked film resolution element 9 interior film resolution element 9 is connected, conduit 12 is inserted in the through hole 11.Shown in Fig. 5 (a), vertically be formed with 4 permeate water drain tanks 13 at conduit 12 upper edge conduits.

As shown in Figure 4, film resolution element 9 is rectangular flat membranaceous, and the long limit of present embodiment is 2 to the ratio of minor face, and the through hole 11 that inserts conduit is positioned on 2 bisectors of minor face.Specifically, preferably long limit is 100～300mm, and minor face is 50～150mm.Oversize, then be difficult to use by melting of carrying out of ultrasonic wave and make the film resolution element, and back washing can not realize (have and produce damaged possibility).

As shown in Figure 6, the 5 layer structure of film resolution element 9 for permeability film 14, adhesive-bonded fabric 15, gripper shoe 16, adhesive-bonded fabric 17, permeability film 18 stacked above one another are formed, the end of permeability film 14, adhesive-bonded fabric 15, adhesive-bonded fabric 17 and permeability film 18 with ultrasonic wave.The material of gripper shoe 16 can be that synthetic resin also can be metal, in a word, so long as can make the material of the certain shape of film resolution element 9 maintenances just passable.

In addition, shown in Fig. 7 (a), near the gripper shoe the through hole 11 16, be formed with 8 otch 19 towards through hole 11.The 20th, the annular seal packing ring, otch 19 extends to the place that exceeds seal washer 20 outsides.In addition, as seal washer, can also adopt the seal washer 21 of the oval shape shown in Fig. 8 (a).In this case, otch 22 also extends to the place that exceeds seal washer 21 outsides.Seal washer 20 and 21 is equivalent to the liner 10 of double as encapsulant.

Shown in Fig. 3 (a), on interior side body 6, longitudinally be formed with permeate water drain passageway 23, the conduit 12 that inserts through hole 11 is communicated with permeate water drain passageway 23.

As Fig. 3 (a) or shown in Figure 4, the through hole 11 that is located on the film resolution element 9 has 2, penetrate the permeability film 14 or 18 and adhesive-bonded fabric 15 or 17 and arrive the processed water of through hole 11a, 11b of film resolution element 9, at interflow, permeate water drain passageway 23 places and be discharged from outside the membrane module.

In addition, on near the gripper shoe the through hole 11 16, shown in Fig. 7 (a) or Fig. 8 (a), be formed with a plurality of otch 19 or 22 towards through hole 11, otch also constitutes the runner of permeate water with adhesive-bonded fabric, so reduced the pressure loss that is penetrated into the permeate water in the film resolution element, guaranteed the inflow smoothly of the through hole 11 of permeate water.Quantity for otch 19 and 22 does not limit, as long as can reduce the pressure loss of permeate water, it is just passable to guarantee that permeate water successfully flow in the through hole 11.In fact, can around through hole, be provided with about 4～20.In addition, the width of otch is preferably about 0.5mm.

As shown in Figure 2, the pressure vessel of interior side body 6 (film resolution element (film resolution element group) sets portion) and a plurality of film resolution elements (film resolution element group) is same length longitudinally, does not have substantial gap between the film resolution element 9 in the adjacent interior side body.

So, as shown in Figure 3, be directed to the processed water in the pressure vessel 3 through cowling panel 7, be penetrated in the film resolution element 9, be discharged to the outside through the permeate water drain passageway 23 that is inserted into the conduit 12 of through hole 11 and be located on the interior side body 6 again, condensed water is discharged to the outside from exporting 2.And then, because the inlet portion of pressure vessel 3 and export department hole enlargement and undergauge lentamente can suppress the formation of whirlpool.Therefore, can reduce the pressure loss of processed water by described wide diameter portion 24 or reducing diameter part 25 with doing one's utmost.

The operation splitting of membrane separation device of the present invention is very simple, pulls down if will fix the ring flange 26 of pressure vessel shown in Figure 13 and interior side body, can from pressure vessel 3 interior side body be extracted easily.Usually, in pressure vessel 3, be built-in with 5～10 interior side bodies.As shown in Figure 2, interior side body 6 is by constituting to the first half 4 of branch with to Lower Half 5 these 2 parts of dividing, as Fig. 5 institute represents in detail, because these are linked by bolt 27, nut 28, packing ring 29 to half one that divides, thereby the structure of the screw lock by release bolt-nut, can be divided into 2 parts simply.In addition as shown in Figure 2, the first half 4 by side body 6 in pulling down to dividing, the laminated body that is made of a plurality of film resolution elements 9 just reveals, but as shown in Figure 4, between neighbouring film resolution element 9,9, be situated between and be provided with the liner 10 of double as encapsulant, be with the laminated body of film resolution element 9 such structure that wears by conduit 12, by each film resolution element 9 and liner 10 are pulled down and can be decomposed simply, both can after these film resolution elements 9 and liner 10 are removed, conduit 12 be extracted; In addition, also can after being extracted, conduit 12 remove film resolution element 9 and liner 10 again.

Next, describe according to the effect of concrete experiment distinctive formation of the present invention.

(1) effect of otch

As Fig. 7 or shown in Figure 8, by on the gripper shoe 16 of the film resolution element around the through hole 11, adding otch, can expect and reduce the pressure loss that sees through liquid that is penetrated in the film resolution element, therefore carry out following experiment and illustrate in order to confirm this effect.

As the film resolution element, in formation shown in Figure 6, permeability film 14 and 18 is adopted milipore filter, gripper shoe 16 is adopted ABS resin systems, and (size of film resolution element is 100mm * 200mm), liner 10 is adopted EPDM (ethylene propylene diene hydrocarbon copolymer) system, as shown in Figure 2, liner 10 is situated between to be located between each film resolution element 9, stacked film resolution element 9 is amounted to stacked 28 layers of duplexer that forms (100mm * 100mm * 200mm) (with respect to " film resolution element group " of the present invention), be built in the interior side body 6 of diameter 150mm, as shown in Figure 3,5 interior side body 6 relative ground connection are configured in the pressure vessel 3.Then, feed clear water from the pipe arrangement (figure does not show) that links to each other with the cowling panel 7 of the entrance side of pressure vessel 3, with 100 liters/m ²The a fluid stream that sees through of/hr filters.

A. on gripper shoe, be provided with the situation of otch

The gripper shoe 16 of film resolution element 9 is provided with under the situation of 8 otch 19 as shown in Figure 7, the pressure of the clear water of the entrance side of pressure vessel 3 is 0.2MPa, the pressure of the water of discharging from permeate water drain passageway 23 is 0.18MPa, can know that thus the pressure loss is 0.02MPa.

B., the situation of otch is not set on gripper shoe

Under the situation that does not have on the gripper shoe 16 of film resolution element 9 to be provided with as Fig. 7 or otch 19 shown in Figure 8 or 22, because the pressure of the clear water of the entrance side of pressure vessel 3 is 0.25MPa, the pressure of the water of discharging from permeate water drain passageway 23 is 0.18MPa, and the pressure loss that hence one can see that is 0.07MPa.Like this, if do not establish otch on the gripper shoe 16 of film resolution element 9, then the permeate water in the film resolution element only is discharged from by adhesive-bonded fabric, thereby the change of the pressure loss of permeate water is big, and this is conspicuous.

(2) eliminate the effect in the gap between the film resolution element in the adjacent interior side body

If have the gap between the film resolution element in adjacent interior side body, then outstanding absurd creature just is deposited in the gap, thereby causes the pressure loss of runner to increase.Therefore, if be made as shown in Figure 2, the pressure vessel of side body 6 and a plurality of film resolution elements 9 same length longitudinally in making, and as shown in Figure 3, make between the film resolution element in the adjacent interior side body 6 and do not have substantial gap, the situation that then just not outstanding absurd creature is piled up, thus can expect the effect that reduces the flowpath pressure loss.

Therefore, as shown in Figure 3, if there not being the state running in substantial gap between the film resolution element 9 in adjacent interior side body 6, the pressure loss that deducts the pressure gained of the water of discharging from permeate water drain passageway 23 from the pressure of the clear water of inlet 1 side of pressure vessel 3 is 0.01MPa; But in Fig. 3, if state running with the gap that between the film resolution element between the adjacent interior side body 6,6, has 15mm, then the pressure loss that deducts the pressure gained of the water of discharging from permeate water drain passageway 23 from the pressure of the clear water of inlet 1 side of pressure vessel 3 just becomes 0.02MPa, thereby the flowpath pressure loss increases as can be known.But,,, also can carry out film and separate even if exist about 10mm between the then adjacent film resolution element or its following gap if done sufficient pre-treatment (for example, removing the outstanding absurd creature of piling up).

In addition, there is not the such structure in substantial gap between the film resolution element in adjacent interior side body 6, can makes the contraction in length about 7.5% of pressure vessel integral body by being set as.

(3) effect of back washing

If in the pressure vessel 3 of structure as shown in figure 3, (film of MLSS:5000～30000mg/liter) carried out 6 hours separates to feed activated sludge, the intermembranous pressure reduction (pressure of the pressure of the processed water of the entrance side of pressure vessel 3 and the water of discharging from permeate water drain passageway 23 poor) that then begins about 0.1MPa rises to 0.15MPa, can think thus and on the inscape of film resolution element, adhere to, piling up outstanding absurd creature, thereby will pass through the back washing system enforcement counter flow washing (back washing) of fluid (Off mouth one) as shown in Figure 9.If Fig. 9 is described, the 31st, processed water accumulating tank, the 32nd, pressure vessel (membrane module that possesses film resolution element of the present invention), the 33rd, permeate water accumulating tank, the 34th, processed water supply pump, the 35th, back washing water supply pump, the 36th, the flow rate regulating valve of permeate water.

That is, the processed water (former water) that stores in the processed water accumulating tank 31 is supplied to membrane module 32 by processed water supply pump 34 via path 37, and permeate water is supplied to permeate water accumulating tank 33 via path 38.During back washing, stop processed water supply pump 34, starting back washing water supply pump 35 applies negative pressure (0.1MPa) via the film resolution element of path 39 in membrane module 32, to clean with clear water attached to the outstanding absurd creature on the film resolution element 9, be discharged to condensed water side (with reference to Fig. 3) from exporting 2 again.Moreover, back washing water supply pump 35 with just turned round in per 120 minutes according to timer several minutes carry out intermittent running like that.The result of back washing is, because intermembranous pressure reduction returns to 0.11～0.12MPa, so stop the running of back washing water supply pump 35, the film separation is proceeded in the running that begins processed water supply pump 34 once more.To utilize the variation example of the intermembranous pressure reduction of this back washing generation to be illustrated among Figure 10.The longitudinal axis of Figure 10 is represented intermembranous pressure reduction, and transverse axis is represented the accumulated running time of membrane separation device.Back washing water supply pump is running continuously not, but as described above, implements several minutes intermittent running of running in per 2 hours.In the jagged curve map of Figure 10, approximately peak portion and paddy portion will occur in per 2 hours, and this paddy portion just represents the recovery because of the intermembranous pressure reduction of back washing generation.

Moreover, according to the running timing ( イ ミ Application グ) of timer-operated back washing water supply pump 35, can select arbitrarily according to the dirty degree of film resolution element.

(4) contrast of existing membrane separation plant and membrane separation device of the present invention

As precondition, handling 10m ³Under the situation of the sanitary wastewater of/day, relatively be used to realize making the important document of the BOD of processing water in 20ppm or such condition below it, its result such as table 1.

(table 1)

	Absurd creature concentration is hanged in the requirement of processed water	Necessary pre-processing device	Integral device is provided with area
				The present invention	≤ number 100ppm	Filter screen	4m 2
The cast assembly	≤ number 100ppm	Filter screen	6m 2
				Macaroni yarn type assembly	≤ number 10ppm	Coagulative precipitation sand filters	10m 2
The convoluted assembly of helical	≤ number ppm	Coagulative precipitation sand filters secondary filter	12m 2

As shown in table 1, looser for the requirement of the outstanding absurd creature concentration of processed water (former water) because in the present invention and cast assembly, so as long as have the so simple pre-processing device of filter screen just passable.But, because in convoluted assembly of helical and macaroni yarn type assembly, requirement for the outstanding absurd creature concentration of processed water (former water) is very strict, so pre-processing devices such as coagulative precipitation, sand filter plant even secondary filter equipment must be arranged, therefore also must have bigger equipment that area is set.

From table 1 to the requirement of the outstanding absurd creature concentration of processed water (former water) relatively, the present invention and cast assembly are in same level, as long as pre-processing device all is the such equipment of filter screen, but shown in following table 2, the present invention compares the numerical value that can obtain the film filling rate (can with the film resolution element more thickly in the plug-in package) biglyyer with the cast assembly, can also reduce the pressure loss simultaneously.So can obtain the reason of film filling rate in the present invention and be biglyyer because can closely fill on ground very close to each other flat-membrane element is stacked.

On the other hand, the tubular film of flexible shape that will be bigger (about diameter 5～10mm) inserts under the situation of barrel assemblies, and filling rate is with regard to step-down.Why saying so, is because formed the cause in inevitable gap between the tubular film of adjacent flexible shape.

Saidly can obtain the film filling rate biglyyer, be related under the situation of the assembly of making same membrane area and can guarantee necessary runner one thing biglyyer.Though flow velocity is low, because runner is bigger, be easy to flow through (it is big that Reynolds number becomes) so contain the fluid of bigger solid portion, according to the present invention, under low flow velocity, also can carry out film and separate.

(table 2)

	The film filling rate	The supply flow velocity of processed water
			The present invention	10m 2/ assembly	1m/ second
The cast assembly	2m 2/ assembly	2～3m/ second

(5) effect of membrane separation device of the present invention

Summarize above experimental result, main points are as follows.

1. by on the supporter of film resolution element, adding otch, can improve the pressure loss of permeate water.

2. by eliminating the gap between the film resolution element in the adjacent interior side body, the total length of pressure vessel can be shortened 7.5%.And then, since very close to each other, can not pile up so hang absurd creature, and can reduce the pressure loss of processed water.

3. because for the water quality level of former water require loose, so do not need very big pre-processing device, equipment integral body be provided with that area is less get final product, also can carry out efficient film separation even if the flow velocity of processed water is little.Like this, though the more little efficient of flow velocity is good more,, the flow velocity of minimum necessity be arranged from the aspect of the obstruction that prevents film.

Moreover, the invention is not restricted to the foregoing description, only otherwise break away from its purport, beyond the above embodiments, can carry out various changes.

Below, the embodiment to other describes with reference to the accompanying drawings.

Figure 14 is the summary section of the membrane separation device among expression other embodiment of the present invention.Because the inscape of the membrane separation device in the present embodiment waits the key element of explanation identical with the front with Fig. 3 basically, so, all put on same label and omit its explanation, the main explanation part different with the foregoing description for same inscape at this.

As shown in figure 14, membrane separation device in the present embodiment utilizes pressure vessel 3, is arranged on interior side body 6 in this pressure vessel 3, is configured in two film resolution element groups 90 (90A, 90B) in side body 6 in this and is arranged on the formations such as cowling panel 7 of the processed water entrance side of this interior side body 6.At this, film resolution element group 90 has adopted for example big or small element group of 100mm * 100mm * 200mm that is.

Each film resolution element group 90 is by with a plurality of film resolution elements 9 be located at that liner 10 between each film resolution element 9 is stacked to be constituted, for the side from stacked film resolution element 9 and liner 10 connects to opposite side, on film resolution element group 90, formed through hole 11.And, in this through hole 11, be inserted with conduit 12, on conduit 12, longitudinally be formed with 4 permeate water drain tanks 13 (with reference to Fig. 5 (a) etc.).

In the present embodiment, as shown in figure 14, adjacent film resolution element film resolution element group 90 (the first film resolution element group 90A and the second film resolution element group 90B) is with the orthogonal manner setting.

Processed water by (or seeing through) film resolution element group 90 normally flows through like that along the surface that is the flat film resolution element 9 that forms membranaceously.In other words, become circulation path between each film resolution element 9 by processed water.

Therefore, as shown in figure 14, if dispose each film resolution element group 90 with orthogonal manner, the circulation path of the processed water on each film resolution element group 90 also can quadrature.

In addition, in the present embodiment, be positioned at the cowling panel 7 of processed water entrance side and the first film resolution element group 90A adjacent also with the orthogonal manner setting with this cowling panel 7.That is to say that the circulation path of the processed water on the circulation path of the processed water on the cowling panel 7 (circulation path between the plate body 8) and the first film resolution element group 90A constitutes with orthogonal manner.

And then, in the present embodiment, also the same with the embodiment that illustrates previously, with between adjacent film resolution element group 90, do not exist substantial with gap (for example, connect adjacent film resolution element group 90) mode, set the first and second film resolution element group 90A, 90B.

In addition, in the present embodiment, though reason owing to drawing, only represented the permeate water drain passageway 23 that is communicated with the through hole 11 of the second film resolution element group 90B, but on interior side body 6, the permeate water drain passageway that is communicated with the through hole 11 of the first film resolution element group 90A (figure do not show) is set at these permeate water drain passageways 23 approximately to become on 90 ° the different position.

Membrane separation device in the present embodiment is owing to being configured by above mode, so waiting on the effect obtained among the embodiment of explanation with Fig. 3, can also obtain following effect.

In this embodiment shown in Figure 14, adjacent film resolution element group 90A, 90B are configured in the mode of basic quadrature.Therefore, according to present embodiment, the easy turbulizations of the current of the processed water in membrane separation device (turbulent flowization) can suppress outstanding absurd creature matter and pile up to the film surface (permeability film surface) of film resolution element 9.

In addition, in the present embodiment, for cowling panel 7 and the first film resolution element group 90A adjacent, also respectively with the orthogonal manner setting with this cowling panel 7.Therefore, according to present embodiment, owing between the cowling panel 7 and the first film resolution element group 90A, promoted the turbulization of processed water, thereby suppressed the accumulation to the film surface (permeability film surface) of the film resolution element 9 that constitutes film resolution element group 90 such as outstanding absurd creature matter.

Moreover, in the various embodiments described above (with the embodiment that Fig. 3 waits or Figure 14 illustrates), the situation that two film resolution element groups are set in interior side body is illustrated, but the invention is not restricted to this formation, as required, one or three or the film resolution element group more than it also can be set in interior side body.

Below, with Figure 15 the formation that is provided with three or the film resolution element group that (specifically is eight) more than it in interior side body is described.

Figure 15 represents the skeleton diagram of the membrane separation device among other the embodiment of the present invention.Specifically, be the skeleton diagram that expression constitutes the interior side body of membrane separation device and its internal structure etc.

Device in the present embodiment is to use with the same inscape of the various embodiments described above to constitute basically, mainly is the structure difference of interior side body.So, in the following description, for the inscape same with each embodiment of front, put on same label and omit its explanation, mainly the part different with the various embodiments described above described.

Figure 15 (a) expression is located at the summary lateral view of the interior side body 96 in the pressure vessel (figure does not show), at this, expression be that three interior side bodies 96 are connected and are configured in structure in the pressure vessel.In addition, in Figure 15 (b), expression be the summary lateral view of the film resolution element group 90 in the side body 96 in being configured in.And then, in Figure 15 (c), expression be Figure 15 (a) along the arrow C direction to view.

As shown in figure 15, in the present embodiment, interior side body 96 is by constituting to the first half 94 of branch with to the Lower Half 95 of dividing, and side body 96 is configured in the mode that can dispose eight film resolution element groups 90 in this.Specifically, shown in Figure 15 (b), with four film resolution element groups 90 is one, and the first film resolution element group set 90X of portion and the second film resolution element group set 90Y of portion are set, and the 90X of these set portions, 90Y are provided with in orthogonal thereto substantially mode in interior side body 96.

In addition, on interior side body 96, be provided with and be communicated with the permeate water drain passageway 23X that forms like that with the through hole 11 of the first film resolution element group set 90X of portion and be communicated with the permeate water drain passageway 23Y that forms like that with the through hole 11 of the second film resolution element group set 90Y of portion.

According to embodiment shown in Figure 15, because a plurality of (eight) film resolution element group 90 is arranged in the interior side body 96, so with respect to area is set, can implement more jumbo processing.

In addition, according to this embodiment, because the mode that is arranged on the first film resolution element group set 90X of portion in the interior side body 96 and the second film resolution element group set 90Y of portion and is with the cardinal principle quadrature is configured, so can obtain the effect same with the embodiment by shown in Figure 14 of front.And, because each basic inscape all with Fig. 3 waits the embodiment of explanation identical, so also can obtain the effect same with it.

Figure 16 represents the skeleton diagram of the membrane separation device among other the embodiment of the present invention.At this, the summary section of the membrane separation device among Figure 16 (a) expression other the embodiment of the present invention, the B-B of Figure 16 (b) expression Figure 16 (a) is to the summary section of looking section, and the C-C of Figure 16 (c) expression Figure 16 (a) is to the summary section of looking section.

Membrane separation device in the present embodiment, basically to constitute with the essentially identical inscape of the various embodiments described above, but it is relative with the situation of side body in pressure vessel, the having of illustrated each embodiment in front, membrane separation device in the present embodiment does not have the interior side body shown in each embodiment, and is different in this.Therefore, in the following description, for the inscape same with each embodiment of front, put on same label and omit its explanation, mainly the distinctive part (parts different with each embodiment) to present embodiment describes.

As shown in figure 16, the membrane separation device in the present embodiment by the pressure vessel 103 of rectangular tubular, be arranged in this pressure vessel 103 flat water collecting part 106 and by a pair of water collecting part 106 clampings maintained two film resolution element groups 90 etc. constitute.At this, film resolution element group 90 has adopted for example big or small element group of 100mm * 100mm * 200mm that is.

Each film resolution element group 90 is by with a plurality of film resolution elements 9 be located at that liner 10 between each film resolution element 9 is stacked to be constituted, be through to the mode of opposite side with a side, on film resolution element group 90, formed through hole 11 from stacked film resolution element 9 and liner 10.And, in this through hole 11, be inserted with conduit 12, on conduit 12, longitudinally be formed with 4 permeate water drain tanks 13 (with reference to Fig. 5 (a) etc.).

On the pressure vessel 103 of the membrane separation device that constitutes present embodiment, at inlet 1 and export 2 sides and be respectively equipped with flange part 121,122.And, at this inlet 1 and export 2 sides, also be provided with and be constituted as can be respectively 121,122 that be connected, as to possess flange part 131,142 entrance side joint 130 and outlet side joint 140 with flange part.Be located at the flange part 121,122 on the pressure vessel 103 and be located at flange part 131,142 on each joint 130,140, utilize the jockey that constitutes by bolt, nut etc. to connect.In addition, on the flange part 142 that is arranged on the outlet side joint 140, be provided be formed on water collecting part 106 on the permeate water drain passageway 143 that is communicated with of permeate water drain passageway (aftermentioned).

In the present embodiment, as shown in figure 16, form flat water collecting part 106 clampings with stacked film resolution element groups 90 that constitutes such as a plurality of film resolution elements 9 and liners 10 by using, and constituted membrane separation device.More particularly, film resolution element group 90 is by a pair of water collecting part 106 clampings, carrying out a pair of water collecting part 106 of clamping like this was with for 116 (being equivalent to " fixture " of the present invention) be fixedly clamped by a plurality of clampings, by a pair of water collecting part 106 and clamp the film resolution element group 90 keeping with 116 clampings and be pushed in the pressure vessel 103 that forms rectangular tubular, thereby constituted membrane separation device.

In addition, in the membrane separation device in the present embodiment, by each film resolution element group 90 of a pair of water collecting part 106 clampings, be with 116 and be clamped together with four clampings, consider from the viewpoint that prevents the leakage etc. between film resolution element group 90 and conduit 12, this clamping is with 116, and is as shown in figure 16, corresponding with the allocation position of conduit 12 and be provided with.

And, on the tabular water collecting part 106 that film resolution element group 90 constitutes like that in such clamping, be provided with and be used to install the installation slot part 106a that clamps with 116, in this example, under will clamping, water collecting part 106 and film resolution element group 90 can be configured in the pressure vessel 103 with 116 states that are installed in after installing on the slot part 106a.116 usefulness are with in this clamping, and for example stainless steel, plastics, rubber wait and constitute.

In addition, also the same in the present embodiment with the illustrated embodiment in front, dispose each film resolution element group 90 in the mode that between adjacent film resolution element group 90, does not have substantial gap.

Membrane separation device in the present embodiment is owing to constitute by above mode, so among the illustrated embodiment on the obtained effect, can also obtain following effect in Fig. 3 etc.

In the present embodiment, the interior side body that replaces carrying out the maintenance of film resolution element group in other embodiments and possess the permeate water drain passageway simultaneously is provided with water collecting part 106.This water collecting part 106, the same with interior side body also have permeate water drain passageway 23, and play the effect that keeps film resolution element group 90 such, but its formation is different with interior side body.That is to say that interior side body is the drum that can accommodate film resolution element group, but water collecting part 106 is writing board shape.And, as shown in figure 16, in the present embodiment, film resolution element group 90 is clamped between a pair of water collecting part 106, carry out the fixing of water collecting part 106 and film resolution element group 90 with clamping with 116.This water collecting part 106, shown in Figure 16 (c), have and film resolution element group 90 essentially identical width dimensions, clamp with 116 with the contacted mode in end of water collecting part 106 and film resolution element group 90, the film resolution element group 90 between a pair of water collecting part 106 is clamped.

As previously discussed, according to present embodiment, under the state that is keeping film resolution element group 90, only exist the clamping of thin ribbon shaped to be with 116 at its side.The opposing party is in the various embodiments described above, owing to used the interior side body of drum, so at the side of film resolution element group, have the essentially identical thickness in top and bottom with film resolution element group.

Therefore,,, unnecessary space is set, just can constitutes membrane separation device so not be used in the side of film resolution element group 90 owing to used flat water collecting part 106 according to present embodiment.The space that this part that save is unnecessary, can also respective degrees ground realize the miniaturization of pressure vessel 103, according to present embodiment, have in formation under the situation of device of same disposal ability, area can be set cut down about 3 one-tenth.Owing to can cut down like this area is set, obviously just can seek to reduce cost.In addition, because water collecting part 106 is to constitute with flat material,, also can seek to reduce cost, and assembling also can be carried out simply so the making of water collecting part 106 is easy.

In addition, in the present embodiment, as shown in figure 16,, pressure vessel 103 is constituted rectangular tubular, so membrane separation device integral body also becomes square owing to being the mode of saving wasted space according to the shape that cooperates water collecting part 106 and film resolution element group 90.

Therefore, according to present embodiment, can carry out the stacked of a plurality of membrane separation devices at an easy rate.That is to say,,, also need some holding member so be not simply overlapping stacked the time because the pressure vessel that the various embodiments described above utilization can high voltage bearing drum has constituted membrane separation device.But, according to present embodiment, because the whole one-tenth of membrane separation device square, so can more easily realize lit-par-lit structure.

Membrane separation device in the present embodiment, even if monomer also can realize being provided with the reduction of area as mentioned above, but if be set as the structure of carrying out stacked grade, then because the holding member beyond can also the cutting device monomer, so from the formation that multiple arrangement is laminated relatively, can further improve the reduction degree that area is set.

Moreover, under the situation of the pressure vessel 103 that uses rectangular tubular,, preferably use film beyond the reverse osmosis membrane as the permeability film from the manufacturing cost of taking into account pressure vessel simultaneously and the viewpoint of withstand voltage properties.

In addition, in Figure 16, be provided with the structure of flange part 121,122 though represented pressure vessel 103, the invention is not restricted to this structure, as required, it is also passable on the pressure vessel 103 that constitutes each membrane separation device flange part 121,122 not to be set.Therefore, for example, can will on each pressure vessel 103, not have the stacked specified quantity of membrane separation device of flange part yet, on the aggregate of the membrane separation device of each stacked this specified quantity, flange part and joint etc. are set.

According to such formation, in the time of can cutting down the stacked multilayer of a plurality of membrane separation devices more area etc. is set.

Moreover, in the embodiment shown in Figure 16, though water collecting part being had the situation of writing board shape is illustrated, but the invention is not restricted to this structure, water collecting part is so long as have the permeate water drain passageway and simultaneously can clamping and keep film resolution element group, and then its shape and just constituting limits especially.Therefore, for example also can constitute water collecting part with the oval-shaped tubular part of cross section circle or cross section.In addition, though be that rectangular situation is illustrated to the cross section of pressure vessel, the invention is not restricted to this structure, the cross section also can be a square.

In addition, in Figure 16,, the invention is not restricted to this formation, in the membrane separation device that constitutes as shown in Figure 16, too, preferably at inlet 1 cowling panel is set as required though represented not to be provided with especially the situation of cowling panel.

And then, as required, also can be with the adjacent and film resolution element group 90 of establishing be provided with that the position is the same with embodiment shown in Figure 14 to tilt about 90 °.

In addition, in the various embodiments described above,, the invention is not restricted to this formation though the circulating direction of the processed water situation identical with the circulating direction of permeate water is illustrated.Therefore, for example, also inlet among each embodiment 1 and outlet 2 can be exchanged, constitute and make the processed water circulation.That is to say, processed water said outlet 2 from each embodiment is flowed into, make condensed water from 1 outflow that enters the mouth.In addition, can also be set as at inlet 1 and export on 2 both sides cowling panel is set, and the circulating direction of processed water be switched such structure every the stipulated time.

Moreover, in the various embodiments described above,, in the present invention, can use metals such as stainless steel, carbon steel or the resin that constitutes in withstand voltage mode etc. though formation material of pressure vessel 3,103 etc. is not mentioned especially.In addition, under the situation of using metal material, also can wait to constitute pressure vessel 3,103 by the last resin of side covering within it.

Owing to the present invention is configured as mentioned above, so have following effect.

(1) according to claim 1,4,9,15,16,17 inventions of putting down in writing, even if the flow velocity that can provide a kind of film to be not easy to stop up processed water smallerly can carry out also that film separates, the film charging efficiency is high, be difficult for piling up membrane separation device and the membrane separating method of foreign matter in the device. Particularly according to claim 9,17 inventions of putting down in writing, because side body has used the water collecting part that is formed by plate-shaped member etc. in replacing, so a kind of membrane separation device and membrane separating method of more miniaturization (compactness) except above-mentioned effect can be provided.

(2) according to claim 2,5 inventions of putting down in writing, the total length that can shorten pressure vessel realizes densification, can suppress the accumulation of the outstanding absurd creature in the pressure vessel simultaneously.

(3) according to claim 3,12 inventions of putting down in writing, can reduce the pressure loss that sees through water in the film resolution element. In addition, the invention of putting down in writing according to claim 13 can further reduce the pressure loss.

(4) invention of putting down in writing according to claim 6 with respect to area is set, can be implemented than in the past more jumbo processing.

(5) invention of putting down in writing according to claim 7, by adjacent film resolution element group angle is in accordance with regulations disposed obliquely, therefore the easy turbulization of the current of processed water can suppress outstanding absurd creature matter etc. to the accumulation on the film surface (permeability film surface) of film resolution element. Especially according to claim 8 the invention of putting down in writing because film resolution element group arranged substantially orthogonal theretoly, so the turbulence effects of processed water is maximum, can more effectively suppress to hang absurd creature matter etc. to the accumulation on the film surface of film resolution element. And then, the invention of putting down in writing according to claim 14 owing between cowling panel and film resolution element group, make the easy turbulization of current of processed water, so with foregoing similarly, can suppress outstanding absurd creature matter etc. to the accumulation on the film surface of film resolution element.

(6) invention of putting down in writing according to claim 18 can provide a kind of not susceptible to plugging membrane separating method of film of film resolution element.

(7) invention of putting down in writing according to claim 19 can provide effective film cleaning method.

Claims (8)

1. a membrane separation device is characterized in that possessing: the pressure vessel that is formed rectangular tubular with processed water inlet and condensed water outlet; The a pair of water collecting part of be arranged in the aforementioned pressure container, utilizing plate-shaped member to constitute; With the film resolution element group that is being kept by aforementioned water collecting part clamping;

Aforementioned a pair of water collecting part is fixed by fixture, thereby be set in the above-mentioned pressure vessel, aforementioned films resolution element group is by with a plurality of film resolution elements be located at that liner between the aforementioned films resolution element is stacked to be constituted, and forms through hole like that on the aforementioned films resolution element with what connect aforementioned films resolution element and aforementioned liner;

The aforementioned through hole that forms on aforementioned films resolution element group is connected with the permeate water drain passageway that forms on aforementioned water collecting part;

The processed water that is directed in the aforementioned pressure container is penetrated in the aforementioned films resolution element, is discharged to the outside through aforementioned through hole and aforementioned permeate water drain passageway again.

2. membrane separation device as claimed in claim 1, its integral body is formed square.

3. membrane separation device as claimed in claim 1 or 2, wherein the aforementioned films resolution element is 5 layers of structure that keep body, gripper shoe, interval to keep body, permeability film stacked above one another to form with the permeability film, at interval, mode so that a square end portion links to each other with aforementioned through hole is provided with at least one otch on aforementioned gripper shoe.

4. membrane separation device as claimed in claim 3, the opposing party end of aforementioned otch wherein is arranged on the outside of the view field of the aforementioned liner on the aforementioned gripper shoe.

5. as any described membrane separation device in the claim 1 to 4, wherein the processed water entrance side at the aforementioned pressure container is provided with cowling panel, and aforementioned cowling panel is provided with in the mode that is orthogonal substantially with adjacent film resolution element group.

6. a membrane separating method is characterized in that possessing: the pressure vessel that is formed rectangular tubular with processed water inlet and condensed water outlet; The a pair of water collecting part of be located in the aforementioned pressure container, utilizing plate-shaped member to constitute; With the film resolution element group that is being kept by aforementioned water collecting part clamping;

Aforementioned a pair of water collecting part is fixed by fixture, thereby be set in the above-mentioned pressure vessel, aforementioned films resolution element group is by with a plurality of film resolution elements be located at that liner between the aforementioned films resolution element is stacked to be constituted, and is formed with through hole like that on the aforementioned films resolution element with what connect aforementioned films resolution element and aforementioned liner;

The aforementioned through hole that forms on aforementioned films resolution element group is connected with the permeate water drain passageway that forms on aforementioned water collecting part;

The processed water that is directed in the aforementioned pressure container is penetrated in the aforementioned films resolution element, discharges to the outside through aforementioned through hole and aforementioned permeate water drain passageway again.

7. membrane separating method as claimed in claim 6, entrained gas in processed water wherein imports to the processed water of 2 phase fluid states in the pressure vessel.

8. as claim 6 or 7 described membrane separating methods, wherein the back washing water of discharging the back washing water after side will pressurize or sneaking into gas from the permeate water of pressure vessel is passed into cleaning film resolution element in the pressure vessel.

Images