WO2005042803A1

WO2005042803A1 - Water treatment device

Info

Publication number: WO2005042803A1
Application number: PCT/EP2004/012308
Authority: WO
Inventors: Marc Flettner
Original assignee: Marc Flettner
Priority date: 2003-10-31
Filing date: 2004-10-29
Publication date: 2005-05-12
Also published as: DE10351275A1

Abstract

The invention concerns a water treatment device comprising a pipe element wherein is or can be installed a sacrificial anode. The invention is characterized in that the sacrificial anode (11) can be removed from the pipe element through a sealable opening (5) which is provided in said pipe element.

Description

The water treatment unit

The invention relates to a water treatment device comprising a line element in which at least one sacrificial anode is inserted / can be used.

Such water treatment devices are known in the prior art, for example for use in water supply networks, as described by way of example in US Pat. No. 3,974,071. Typically, a line element of such a water treatment device comprises a metallic sleeve into which one or more sacrificial anodes can be inserted / inserted, a sacrificial anode being connected to the metallic sleeve in an electrically conductive manner. The line element itself can form the metallic sleeve.

The effect of such water treatment devices is based on an electro-galvanic principle, in which a conductive connection between two dissimilar metals releases one of the two metals into the water as a sacrificial anode due to the different valences of these metals. It has been found here that this metal ion release produces positive effects in that, for example, a corrosion protection layer can be built up on the inside of the pipe of a water supply network in which such a water treatment device is located.

It has also been observed that the release of metal ions leads to an agglomeration of water constituents, for example scale-forming substances, as a result of which an increase compared to untreated water and increased particle size of the water constituents presumably results from nucleation on the metal ions.

In particular, by increasing the water contents through agglomeration, less of these ingredients can settle in the following pipeline network, so that in a pipeline network that has such a water treatment device, the effective internal cross section of the pipes can be kept free of deposits. Without such a water treatment device, a tendency can be seen that water supply pipes gradually grow over time from the outside inwards, for example due to limescale deposits.

Since an essential effect of such water treatment devices is based on the release of metal ions from the sacrificial anode, it can be observed in the operation of such water treatment devices that the sacrificial anodes are gradually used up. Likewise, sacrificial anodes, which, for example, have a large number of bores or channels to achieve a large surface area, can become contaminated due to suspended matter in the water.

For this reason, maintenance of the water treatment device, in particular replacement of the used or soiled sacrificial anodes, is required within certain intervals. For this purpose, it is known in the prior art to remove a respective water treatment device from the water supply network and to replace it with a new water treatment device. It is also known in principle to replace the used or contaminated sacrificial anode of such a removed water treatment device with a new, unused sacrificial anode, for which purpose the water treatment device must be disassembled into its individual parts, which - as mentioned - is only possible if the water treatment device has been removed from the water supply network beforehand has been. Such an expansion for maintenance of the anode is complex and costly, especially in the case of very large and therefore also very heavy water treatment devices, for example a nominal size larger than DN 300, such as are used in large water supply lines or, for example, also in water treatment devices for power plants with much larger nominal sizes , Such big

Due to their considerable mass, water treatment devices can usually only be moved with the help of crane trucks and installed or expanded in a pipeline network. However, the invention relates to water treatment devices of any nominal size.

The object of the invention is to provide a water treatment device of the generic type which is particularly low-maintenance and in which a simple exchange of one or more sacrificial anodes is possible, in particular even with very large nominal diameters.

This object is achieved according to the invention in that in a water treatment device according to the invention a sacrificial anode can be removed from the line element through a closable opening arranged on the line element.

This feature, which is essential to the invention, of a closable opening arranged on the line element means that in the event of maintenance, in particular for replacing the sacrificial anode, it is no longer necessary to remove the complete water treatment device from the water line network. According to the invention, the closable opening on the line element can now be opened and a sacrificial anode inserted in the line element can be removed through this opening and replaced by a new sacrificial anode, for example, in the event of contamination or wear.

After inserting a sacrificial anode into the line element, the opening can then be closed and thus the Water treatment device to be operated again with optimal efficiency.

Particularly in the case of very large water treatment devices, such as can be used in power plants, the structure according to the invention only requires the weight of a corresponding sacrificial anode to be mastered and no longer the weight of a complete water treatment device.

The construction of a water treatment device according to the invention is advantageously such that the closable opening is arranged in the wall of the line element, in particular between an inflow and an outflow opening. The inlet and outlet openings are arranged in the flow direction in conventional water treatment devices, so that according to the invention it can be provided, for example, that the closable opening and the axis in which a sacrificial anode can be inserted or removed from the water treatment device are perpendicular to the usual one Flow direction of the water is arranged.

A water treatment device according to the invention is also advantageously constructed in such a way that it has an area extending behind a closable opening for receiving a sacrificial anode or for receiving a cassette into which a sacrificial anode can be inserted / inserted interchangeably.

According to the invention, it can accordingly be provided that either a sacrificial anode can be inserted directly into the line element through the opening, or that a type of intermediate device in the sense of a cassette is provided, into which a sacrificial anode can be replaced or inserted, so that this can then be used The entire arrangement of the cassette together with the sacrificial anode can be inserted into or removed from a line element. A sacrificial anode or cassette with such a sacrificial anode inserted into the water treatment device preferably divides the water treatment device or the line element into an upstream and a downstream part such that water from one part to the other only through the sacrificial anode or through the cassette and thus likewise can flow through the sacrificial anode. This ensures that all water that flows through the line element in the direction of flow must definitely pass the effective surface of the sacrificial anode and undergo appropriate treatment.

In order to ensure that a sacrificial anode extending across the line element or a cassette holding this sacrificial anode is securely accommodated in the receiving area of the line element, it can be provided according to an advantageous development of the invention that an area opposite the closable opening in the wall the water treatment device has an inner recessed portion which serves to receive and / or stabilize at least one end region of a sacrificial anode or a cassette. This construction results in a secure mounting of the sacrificial anode or the cassette, at least in the area of the edge of the opening and in the inner wall area of the line element opposite the opening.

In general, it can advantageously be provided according to the invention that the area for receiving a sacrificial anode or a cassette has an inner cross section which is larger in comparison to the downstream and upstream area. The receiving area of the sacrificial anode or the cassette can have a substantially rectangular inner cross section, which leads to a particularly simple handling of the sacrificial anode or the cassette when pushing in and out, since the cassette or Sacrificial anode has a cross-section corresponding to this and thus a cassette or Can easily insert sacrificial anode in the manner of a drawer in the line element.

Furthermore, by increasing the cross-section from the upstream or downstream area to the receiving area for the sacrificial anode or cassette, a step can be formed in the inner wall area of the water treatment device, which serves as a guide or also as a system for a sacrificial anode or cassette that can be inserted through the opening. Since two such stages (one in the downstream and one in the upstream region) form inside the line element of the water treatment device, a cassette or a sacrificial anode, which is inserted into the corresponding receptacle without a cassette, is held securely against the water pressure between the two stages.

Here, the steps or the immediately adjacent surfaces in the interior of the line element, in particular those which extend parallel to the surface of an inserted cassette or a sacrificial anode, can serve as sealing surfaces in order to prevent water from flowing around the sacrificial anode on its flow path.

If a cassette is to be used for the construction according to the invention, which is used to modularly accommodate a sacrificial anode, such a cassette can, for example, form a frame with an inner recess into which a sacrificial anode can be inserted. Here, the sacrificial anode can be sealed, in particular at its edge, with respect to the frame of the cassette. Such a seal can be made, for example, in that a sacrificial anode has recessed grooves on its outer surface, into which O-ring seals are inserted. Such a construction is particularly simple if the modularly exchangeable sacrificial anode has a circular cross section.

According to the invention, it can then be provided that a new fresh sacrificial anode is first placed in the used or soiled sacrificial anode Insert the cassette frame and then insert the entire assembly with the cassette through the closable opening of the line element into the corresponding receiving area. After this overall arrangement has been inserted or if a correspondingly shaped sacrificial anode is used as a whole, and if no separate cassette is used, the closable opening can be closed by a corresponding cover and, if appropriate, a seal placed in between. It can be provided that such a closure cover is attached to the frame of the cassette or directly on the sacrificial anode or can be attached or even integrally formed.

In order to facilitate the insertion of a sacrificial anode or a cassette with a sacrificial anode therein, particularly in the case of particularly heavy designs, it can also be provided in a further development of the invention that a guide for facilitating the insertion of a sacrificial anode is provided at least in the area of the opening, e.g. characterized in that the opening has at least one inwardly projecting projection, in particular two, inwardly projecting projections on opposite sides, which in the present case in particular each serve as a guide for a sacrificial anode or cassette to be inserted.

In order to achieve such guidance, it can further be provided that a sacrificial anode / cassette has a corresponding groove on its outer edge, in particular on two opposite edge regions, into which a projection projecting inwards into the opening engages. In order to achieve a better threading of the cassette frame with its groove on the inwardly projecting projection, it can be provided that either a groove or a projection or both have correspondingly beveled contact surfaces. Other types of guide designs can also be used.

In order to continue to achieve an optimal efficiency of the water treatment device according to the invention, it can be developed in a further embodiment it should be provided that at least one vortex insert is arranged in the downstream and / or upstream region of the water treatment device, in order to generate a swirling of the fluid in the interior of the line element, in particular the region of the sacrificial anode. This swirling creates a particularly intimate contact between the water and the sacrificial anode, and furthermore, such swirling reduces the tendency of the sacrificial anode to become dirty, which may consist, for example, of a large number of parallel bores / channels.

According to a further embodiment, it can be provided in the water treatment device according to the invention that the areas upstream and downstream of the receiving area of a cassette or a sacrificial anode are symmetrical. In such a case, the installation direction of a water treatment device according to the invention is irrelevant in relation to the water supply network.

An embodiment of the invention is shown in the following drawings. Show it:

FIG. 1 shows a water treatment device in supervision of a closable opening for exchanging sacrificial anodes,

FIG. 2 shows a water treatment device in supervision of one of the connection flanges for mounting in the water supply network,

FIG. 3 shows a cross section through a water treatment device according to the invention with a laterally arranged opening for exchanging sacrificial anodes,

FIG. 4 shows a cross-sectional view of section AA of FIG. 3 in the plane of the receiving area for a sacrificial anode to be replaced, FIG. 5 shows a cassette frame for receiving a circular sacrificial anode in several views,

FIG. 6 shows the execution of a sacrificial anode in different representations with a plurality of bores arranged next to one another and extending through the sacrificial anode,

FIG. 7 shows in several views a closure cover for closing the opening on the water pipe element,

FIG. 8 shows a seal for insertion between the cover and the flange of the opening on the line element,

Figure 9 in several views a vortex insert for insertion in the upstream or downstream area of the water treatment device.

1 shows an example of the water line element 1 of a water treatment device according to the invention with flanges 2 and 3 attached at the ends for connecting the line element to a water line network. The connection flanges 2 and 3 can have any construction known to the person skilled in the art in connection with line elements, regardless of the example shown.

In the present case, the water flow through the line element 1 runs in the direction I-II or vice versa and thus in any case in the axial direction between the flanges 2 and 3.

Perpendicular to this direction, the illustration according to FIG. 1 shows an opening 5, likewise surrounded by a flange 4, through which, in the present embodiment, a cassette with a sacrificial anode which can be inserted therein the line element 1 can be used perpendicular to the flow direction l-ll. Flange 4 and opening 5 have an essentially rectangular cross section, the respective corner regions being rounded.

FIG. 2 shows the same water treatment device in a view from above or from below of the respective connection flange 2 or 3. It can be seen that the flanges 2 and 3 each have a large number of bores in order to establish the connection to a water supply network. 2, the flange 4, which surrounds the insertion opening 5, is shown on the left-hand side.

It is clear in FIGS. 2, 3 and 4 that the inner free cross section of the receiving area 6, as it extends behind the opening 5 in the interior of the line element, has a significantly larger inner free cross section in the plane AA of FIG. 3 than the surrounding ones downstream and upstream areas 7 of the water pipe element.

This becomes particularly clear in FIG. 4, which shows the section in the plane A-A of FIG. 3 and thus essentially an almost rectangular inner free cross section of the receiving area 6, into which a cassette with a sacrificial anode inserted therein can be inserted. In this example, the entire recording area is thus approximately cuboid.

FIG. 5 shows a corresponding cassette 8, which essentially forms an outer frame 9, which in this exemplary embodiment has a circular, inner recess 10 for receiving a sacrificial anode 11, as is shown in FIG. 6. Such a sacrificial anode 11, shown here in a circular manner, has a multiplicity of bores / channels 12 which extend longitudinally through the sacrificial anode 11 and thus ensure a large surface area of the metallic sacrificial anode 11. FIG. 6 further shows that on the outer circumference of the sacrificial anode 11 there are two grooves 13 into which O-rings can be inserted in order to achieve a secure and sealing fastening of the sacrificial anode 11 in the inner round recess 10 of the cassette frame 9.

If such a sacrificial anode 11 is now inserted into the recess 10 of the cassette frame 9, this overall arrangement can then be inserted through the opening 5 of the line element 1 into the inner receiving area 6.

This already results in a guide through the respective step 14 for the cassette 8 to be inserted, which results at the transition from the inner region of the downstream and upstream regions 7 to the receiving region 6 with an enlarged cross section. Adjacent to this step 14, surfaces 16 of the pipeline element in the inner step area run essentially parallel to the surface 15 of the sacrificial anode 11, which ensure both secure seating of the cassette and the sacrificial anode arranged therein and tightness between the cassette and the line element.

In order to enable easy threading of a cassette 8 with sacrificial anode 11 arranged therein, according to the embodiment shown here, it is provided in the opening 5 of the line element 1 on two opposite sides - here on the short sides - protruding projections 17, which with corresponding grooves 18 cooperate on the frame 9 of the cassette, which are arranged on two opposite frame regions of the cassette. When a cassette is inserted through the opening 5 into the inner region 6 of the line element 1, a projection 17 engages in a groove 18, so that this also results in a particularly simple guidance. For better threading, the projections 17 or the grooves 18 can have correspondingly beveled leading edges. FIG. 7 shows a cover element 19 from different directions, which, according to the construction shown here, can be fastened to a projecting area 20 of the frame 9 of the cassette 8 via corresponding bores 21 in this area 20 and corresponding blind threaded holes 22 in the cover 19. In another embodiment, it can also be provided that the cover is integrally molded onto the frame 9 in one piece.

By means of the seal 23, as shown in FIG. 8, a tight connection between the cover 19 and the flange 4, which surrounds the opening 5 of the line element, can then be achieved. For this purpose, a plurality of through bores 24 are provided in the cover 19, through which fastening in the corresponding blind threaded bores 25 in the flange 4 is achieved by means of screws.

FIG. 9 additionally shows the design of a swirl insert 25 as it is in each case both in the downstream and in the upstream region 7 of the line element, i.e. can be arranged upstream and downstream of a sacrificial anode. However, the use of such a swivel insert is not absolutely necessary. In the present case, the vortex insert is designed such that two perforated plates 26 and 27 are kept at a distance by perforated plates 28 arranged obliquely in the flow direction. The respective holes in the respective sheets are designed in different sizes and arrangements in order to achieve an optimal swirling of the water flowing through.

With the construction according to the invention, as shown in FIGS. 1-9, it is achieved that especially in large-scale buildings

Water treatment devices of the type shown can be replaced in a particularly simple manner, a sacrificial anode here by means of a cassette surrounding it. For this purpose, it is only necessary to open an opening 5 provided for this purpose by removing a cover 19, to remove the cassette 8 with a used or soiled sacrificial anode 11 and to insert a cassette 8 with a new sacrificial anode 11 and to open the opening 5 to close again by the cover 19. The particular advantage is that a complete removal of the entire water treatment device 1 is no longer necessary for this maintenance case.

Claims

claims

1. Water treatment device comprising a line element in which at least one sacrificial anode can be used, characterized in that a sacrificial anode (11) can be removed from the line element through a closable opening (5) arranged on the line element.

2. Water treatment device according to claim 1, characterized in that the closable opening (5) is arranged in the wall of the line element between an inflow (2) and an outflow opening (3).

3. Water treatment device according to one of the preceding claims, characterized in that it has an area (6) extending behind a closable opening (5) for receiving a sacrificial anode (11), or for receiving a cassette (8) into which a sacrificial anode (11) is used interchangeably.

4. Water treatment device according to one of the preceding claims, characterized in that a sacrificial anode (11) or cassette (8) inserted into the water treatment device (1) divides the water treatment device (1) into an upstream and a downstream part (7) such that water from one part to the other (7) can only flow through the sacrificial anode / cassette (11/8).

5. Water treatment device according to one of the preceding claims, characterized in that an area opposite the closable opening (5) in the wall of the water treatment device (1) has an inner recessed section has, which serves for receiving and / or stabilizing at least one end region of a sacrificial anode / cassette (11/8).

6. The water treatment apparatus according to any one of the preceding claims, characterized in that the region (6) for receiving a sacrificial anode / cassette (11/8) has a compared to the downstream and upstream region (7) increased intra-et QuerschnJJt aufyv JSK _Λ

7. Water treatment device according to one of the preceding claims, characterized in that the receiving area (6) has a substantially rectangular inner cross section.

8. Water treatment device according to one of the preceding claims, characterized in that a step (14) is formed in the inner wall region of the water treatment device (1) by the cross-sectional enlargement from the downstream or upstream area (7) to the receiving area (7), which as a guide for a sacrificial anode / cassette (11/8) which can be inserted through the opening (5).

9. Water treatment device according to one of the preceding claims, characterized in that a cassette (8) forms a frame (9) with an inner recess (10) into which a sacrificial anode (11), in particular with an edge seal, can be inserted.

10. Water treatment device according to one of the preceding claims, characterized in that on the frame (9) of the cassette (8) or directly on the sacrificial anode (11), a closure lid (19) can be fastened or molded in one piece.

11.Water treatment device according to one of the preceding claims, characterized in that the opening (5) has at least one inwardly projecting projection (17), in particular has two inwardly projecting projections (17), in particular wherein one Projection (17) serves as a guide for a sacrificial anode / cassette (11/8) to be inserted.

12. Water treatment device according to claim 11, characterized in that a sacrificial anode / cassette (11/8) has a groove (18) on its outer edge, in particular on two opposite edge regions, into which a projection projecting inwards into the opening (5) (17) engages.

13. Water treatment device according to one of the preceding claims, characterized in that in the downstream and / or upstream region (7) of the water treatment device (1) at least one vortex insert (25) is arranged to one in the region of the cassette / sacrificial anode (8/11) To create turbulence in the water.

14. Water treatment device according to one of the preceding claims, characterized in that the areas (7) upstream and downstream of the receiving area of a cassette / sacrificial anode (8/11) are symmetrical.