DE7505931U - Tubular devices for reverse osmosis and ultrafiltration and element for connecting the same - Google Patents

Description

) «« ·· tic «isciccc

J Mil Ii ι, j

■ * r _t '■ jj «» ^ «ι * c

N i «t> tt, t in ι t ^. ' ^c

HOECHST AKTIENGESELLSCHAFT

KALLE branch of Hoechst AG Gbm 725 Wiesbaden-Biebrich February 7, 1975 |

WLJ-Dr _t G-br

Tubular devices for reverse osmosis and ultrafiltration and element for connecting the same

The innovation relates to tubular devices for treating liquids flowing under pressure Use of semi-permeable, closed-loop membranes and. Elements for connecting these devices, The device is used, for example, for Desalination of sea water, for the extraction of pure solvents from solutions, for the concentration of Solutions and for similar tasks using reverse osmosis, dialysis and ultrafiltration.

The known tubular devices for reverse osmosis and ultrafiltration, so-called tube modules, consist of a tubular semipermeable membrane, a die The pressure pipe surrounding the membrane, the wall of which is permeable to liquids due to its porous structure or by means of fine bores, and the pressure pipe enclosing dumbbell tube.

Il ·

The solution to be separated flows under pressure axially through the tubular, semipermeable membrane which is attached to the inner Handling of the pressure pipe is applied, the pure solvent diffuses through the wall of the membrane tube, passes through the wall of the pressure pipe from the inside to the outside and is collected in the jacket pipe surrounding the pressure pipe while the concentrated solution in the membrane tube axial direction leaves.

In order to obtain a larger exchange surface and to enable economical operation, several such tubular devices for reverse osmosis and ultrafiltration are usually arranged one behind the other, through which the solution to be separated flows one after the other. For this it is necessary to connect the individual pipe modules to a larger unit using suitable elements.

There are known connecting elements in the form of front panels. Several tubular modules are grouped together on the front, by inserting the pipe ends into the corresponding holes in the front panel. Di & bores are through channels inside connected to the front plates, through which the liquid to be separated can flow from one pipe to the other. These Elements require both a significant amount of manufacturing

7505S31 08/28/75

I · · * ♦ · Il

II · »· # * ill

I f »■ ♦ · *

(It Il * ■ · * ·· * M

Precision on tube and connecting element as well as special Care should be taken when assembling the individual parts, as several pipes are tightly connected to the front panel at the same time must, moreover, individual tubes are not separately accessible if, for example, a damaged membrane has to be replaced.

It is also known that usually parallel adjacent pipe modules by means of individual tube bend? U ver * \ bind This design does offer the advantage of the feed i accessibility of individual tubes, however, is linked to their well-known designs, with the disadvantage that because of the high requirements With regard to tightness in high-pressure operation, complexly shaped individual parts must be used, which considerably reduce the flow cross-section and thus the performance of the system and the production of which causes considerable costs,

The task of the innovation is to create tubular devices for reverse osmosis and ultrafiltration! the be connected by elements that allow easy assembly and disassembly of the individual pipes, changing the hose membranes quickly and without the risk of To make membrane damage, a damage safeguard

Attachment of the membrane to ensure a pressure-tight To achieve sealing, pressure losses in the system are low and good fluid circulation along the Ensure membrane.

This object is achieved according to the invention by tubular devices for carrying out Reyer osmosis and ultrafiltration and a member for connecting the tubular devices, the tubular devices consist of liquid-permeable pressure pipes that on the one hand with sch! also-shaped semipermeable membranes and if necessary lined with drainage layers, which are on the other hand ijmschlossen from jacket pipes and the furthermore have sealing heads fastened at their ends, and wherein the element for connecting the tubular Devices consist of pipe bends and ring-shaped clamps, which are characterized in that the pipe bend has essentially the same inner diameter like the pressure pipe and at both ends each has a flange directed outwards at right angles, which by means of a Union nut is connected to the sealing head fixed on the pressure pipe, the edge tibes · an annular elastic Sealing element is pressed against an annular clamping part, which the end of the hose-shaped membrane against an annular, elastic, circular cross-section

7505931 06/26/75

Sealing element, which is in one in the end face of the the pressure pipe fixed sealing head incorporated annular Groove is inserted, and wherein the inner sealing head part has a circumferential, ring-shaped part on its inside Has web, the inner surface of which is flush with the inner wall of the pressure pipe.

The schematic representations serve to explain the innovation in Figures 1, 2, 3 and 4.

Figure 1 schematically describes the structure of a system with several tubular devices for pressure treatment of flowing liquids, using tubular Membrane 1, pressure pipe 3 and jacket pipe 12 and pipe bend elements 11 for connecting the pressure pipes 3 to one another. The raw solution from container 15 passes through a Pump 13 and supply line 14 under pressure into the pipe system 3, and with the help of the semipermeable membrane 1 is in the pure solvent and the concentrated solution separately. The pure solvent passes through the wall of the pressure pipe 3 and is collected in the jacket tube 12, while the concentrated solution through the connecting pipe bend element 11 is passed into the next pressure pipe 3. The separation process is repeated in the subsequent tubular Devices until the desired final concentration is reached. Via lines 18 and collecting line 19 is

7505931 06/26/75

the pure solvent passed from the collecting pipes 12 into cjen container 17, the concentrated solution is over a discharge line 20, in which an adjustable throttle valve 21 is arranged to build up the internal pressure in the pressure pipes 3, fed into a container 16,

In Figure 2, the part of the system in area II of the fi

gur I drawn enlarged showing the connection between

Pressure tube 3 and tube sheet 11 is, The pressure tube 3 is internally provided with a text lien material 2, z, B _(fabric, non-woven lined, to which the tubular semi-permeable membrane 1 conforms. When flowing through the tubular membrane 1 the pure solvent passes radially through the war.d of the membrane 1, is carried away in the textile material 2 serving as a drainage layer and, after passing through the fine bores 4, collects in a casing tube 12 surrounding the pressure tube 3, from where it flows off via line 18 into the storage container 17 can.

A sealing head 5 is attached to each end of each pressure pipe 3. This is made so that on his Inside a circumferential annular web 5a remains, the inner surface of which runs flush with the inner wall of the pressure pipe 3, whereby an aligned application of the iDraViinagemateriials 2 is guaranteed, on the "side facing away from the pressure pipe end the end surface of the sealing

7505931 06/26/75

* »1 * I * · 1

head 5 provided with a circumferential groove 5b, which! the inclusion of an annular, circular cross-section the elastic sealing element 7 is used.

As can be seen from FIG. 2, an annular clamping part 8 is now used to hold the end of the hose-shaped semipermeable membrane 1 against the sealing element 7 to press and hereby to support from the inside, the ring-shaped clamping part 8 stands by means of a further ring-shaped one elastic sealing element 9 with the flange 10 of the pipe bend 11 in connection. The sealing element 9 is shown in FIG drawn as a flat seal, In a further embodiment - Figure 3 - it can be as an annular, in cross-section Kreisrunces., elastic sealing element 9a be formed, in one in the annular clamping part 8a. incorporated groove 22 is located. The flange 10 of the pipe bend Π can by flanging / the pipe mouth directly from the pipe bend Π or obtained by welding on a separate flange. With a union nut 6, the Pipe bend 11 is screwed to the welded-on sealing head 5 of the pressure pipe 3. Here, the sealing element 7 is deformed in accordance with the geometry of the groove 5b in such a way that the end of the membrane 1 against the wall of the clamping part 8 pressed and thereby sealed on all sides. This connection guide, allowed in a simple and beautiful way the assembly and disassembly of pipe modules as well as the

- 7th

750.5931 06/26/75

replace hose membranes, as the membrane ends remain protected from damage by the annular clamping part 8 and any adjustment problems when attaching the pipe bends are omitted. A damage-proof and pressure-tight sealing of the membrane is given,

As FIG. 3 also shows, the clamping part can be designed as a clamping part 8a with a nozzle-shaped bore 23. This prevents in the wall area of the pipes and in the area the connection a stall or, turbulence and reduces friction and pressure loss, it will thereby ensures good fluid circulation along the membrane,

Another innovation according to Aijsführungsbei game, the one Has constant diameter in the entire inner area of all components is proposed, as shown in FIG. By one annular recess 24 in the Dichtkppftei1 5 can Membrane 1 and the textile material 2 can be expanded under insertion with clamping part 8b. Clamping part 8b can with this a bore 25b, which corresponds to the inner diameters 25a and 25c of the membrane 1 and the pipe bend 11, respectively Corresponds to, With this version any pressure loss due to constrictions is avoided.

7505931 06/26/75

Claims (4)

PROTECTION APPROACH 1. Tubular devices for performing reverse osmosis and ultrafiltration and element for connecting the tubular devices, the tubular Devices made from liquid-permeable pressure pipes exist, on the one hand with tubular semiperpieablen Membranes and optionally with drainage layers are lined, the other hand enclosed by casing pipes and which also have sealing heads attached at their ends, and wherein the element for connection the tubular device consists of a pipe bend and an annular clamping part, characterized in that that the pipe bend (H) has essentially the same inner Has the same diameter as the pressure pipe (3) .and on each end has a flange (10) directed outwards at right angles, which by means of a cap nut (6) is connected to the sealing head (5) fixed on the pressure pipe (3), the flange (10) via an annular elastic sealing element (9) against an annular clamping part (8) is pressed, which the end of the tubular membrane (1) against an annular, in cross section . circular, elastic sealing element (7) that seals in an annular groove (5b) machined into the end face of the sealing head (5) fixed on the pressure pipe is inserted, and the inner sealing head (5) * n 7505931 06/26/75 its inside a circumferential, ring-shaped Has web (5a), the inner surface of which runs flush with the inner wall of the pressure pipe (3), 2. Tubular devices and element for connection according to claim 1, characterized in that the annular, elastic sealing element (9a) is circular in cross section and is located in a groove (Ϊ2) machined into the annular clamping part (8a). 3. Tubular devices and connection element according to claim 1 or 2, characterized in that the annular clamping part (8, 8a) has a nozzle-shaped passage opening (23). 4. Tubular devices and element for connection according to claim 1 or 2 _a, characterized in that a constant diameter (25a, 25b, 25c) is created through the recess (24) in the sealing head (5) and larger Klemmtei1 diameter. / \ - 10 - 7505931 06/26/75