EP2778297B1 - Method and device for slowing down the formation of deposits in water pumping systems, in particular well systems - Google Patents

Description

The present invention relates to a method for slowing down the formation of blockages in water delivery systems, in particular well systems, as well as a device which is particularly for carrying out the method, and a water delivery system with such a device.

Water delivery systems, and in particular well systems, have a water delivery line, often at very great depths, and a pump that pumps the water and delivers the water out of the well via the water delivery line. A major problem that occurs in almost all well systems are obstructions due to high levels of iron and manganese in the flowing water. This leads to the growth of the openings of the filter sections, the pump and / or the water delivery line and to a corresponding pump power reduction. Obstructions occur as firmly adhering encrustations, which are generally difficult to dissolve or remove.

As a result, water production rates are rapidly decreasing and costly maintenance is needed to ensure the desired amount of water is delivered. The complexity is due to the necessity of cleaning well filters and the removal and repair, possibly even replacement of pumps and very long water supply lines.

The causes of such blockages are of a less physical / chemical nature, which are initial blockages, but predominantly biological in nature. which build on the Initialverockerungen. As stated by Gerhard Krems, "Study on Well Aging on behalf of the Federal Ministry of the Interior, Water Resources Subdivision" of December 1972, and as confirmed by the Applicant's investigations, the cause of the oozing is caused by iron and manganese storage bacteria, mainly by the iron bacteria Gallionella and Leptothrix. The existing divalent iron and / or divalent manganese dissolved in the water is taken up by these bacteria and in the form excreted again from insoluble iron and manganese compounds (loc. cit., pp. 41-42).

In the prior art, a variety of measures have been known both for the prevention of blockages and increasingly for the correction of blockages, which, however, have not led to long-term satisfactory results. For example, the above study (supra, pp. 51-52, No. 7) indicates that the oozing could be severely curbed or prevented by using germicidal agents. These germicidal agents are essentially chlorine, which is added to the water in the well pipe. As is known, however, the presence of chlorine in drinking water is extremely detrimental to its flavor quality of consumption. In addition, a targeted dosage and the local whereabouts of chlorine or other chemical agents at the desired locations in well systems by vertical and horizontal flow movements of the groundwater are not possible. In addition, at certain concentrations, chlorine attacks metallic components of well systems.

As a possibility of prevention of biological oozing of wells according to EP 0 754 837 A2 proposed an irradiation, which consists of a radioactive radiation. The acceptance of radioactive radiation in the population need not be discussed further here.

The DE 1 031 227 relates to a method for restoring obstructed tube wells by means of vibration-generated pressure waves, ie not the prevention or slowing of the ochering, but their subsequent removal.

Also the DE 29 28 998 C2 relates to a method and a device for the discharge of filter tubes from water wells by means of direct current application. As experiments with geophysical measurements of the applicant showed, only the redox conditions are slightly changed. A substantial restriction of the metabolism of the iron bacteria can not be achieved thereby.

According to DE 33 33 842 A1 a de-icing and demineralization system for well systems is proposed, in which compressed air is used to loosen the stains.

The DE 40 10 943 A1 describes a method for preventing oozing phenomena, deposit formation and encrustation, which is to take place by application of an anodic current from a DC voltage source. Again, only the redox conditions are slightly changed, a significant restriction of the metabolism of iron bacteria can not be achieved.

The DE 43 20 414 A1 proposes a device for avoiding blockages in pump systems, in which a magnetizing lance equipped with permanent magnets is connected upstream of the suction region of a pump and combined with it to form a plant-technical unit.

Also the German utility model DE 295 18 229 U1 deals with an arrangement for the regeneration of dirty drinking water wells, so the subsequent elimination of blockages and not to prevent them.

The EP 0 778 393 A2 describes a method and apparatus for maintaining the performance of new wells and for cleaning and regenerating existing wells using ultrasound. Again, this is a subsequent removal of blockages by vibration excitation, this technique does not lead to sustainable desired results.

Only the polarized electrochemical Verockerungsprozessen counteracting measures shows the DE 103 06 119 A1 by connecting a titanium cathode, which can not be seen to prevent the biological blockages.

The above-mentioned methods thus essentially deal with the subsequent removal of occlusions that have occurred. A functioning preventative process, which does not adversely affect the water to be pumped, currently does not exist. In particular, at the moment there is no method which according to the Preventive or slowing down of chemical initial staining.

The present invention is therefore based on the object of proposing a method and a device for slowing down the formation of blockages in water delivery systems, in particular well systems, whereby the performance of the water supply systems can be significantly increased and the measures to be taken can be implemented in a relatively simple manner.

This object is solved by the features of claim 1 and of claim 3.

According to the invention, frequencies between 100 kHz and 25 MHz are generated by means of a frequency generator, and these frequencies are transmitted to at least one alternating-current probe, whereby by means of the at least one alternating-current probe the congestion areas in the well system, in particular in the main inlet areas to the well and / or in the area of the pump and / or the Water supply line of the water conveyor system, are acted upon by the frequencies generated by the frequency generator.

According to the device according to the invention, the at least one AC probe is arranged in the well filter or on or in the pump of the water delivery system and generates AC fields in the region of the water inlet of the well or the pump.

Long-term experiments have shown that the measures taken in the well studied have led to a significant slowdown in the osmotic process. With great advantage, the effect could be achieved that the deposited blockages could be easily solved mechanically, since the production of a biological conditional encrustation, as in conventional untreated well systems, has not occurred. This leads to a considerable reduction in the cost of maintenance of the well systems, because on the one hand the maintenance intervals can be considerably increased and on the other hand almost no biologically caused incrustations of the blockages more arise, which allows their easy detachment.

Advantageously, the passage through the applied frequencies cyclically, whereby a negative influence on the different bacteria is made possible.

The loading cycle is between a few milliseconds and several minutes. Since different types of bacteria are often involved in the amelioration processes, thereby the time of action and frequency for each individual species can be optimized.

According to the invention, the device for slowing down the formation of blockages in water delivery systems, in particular well systems, which have a well filter, a water delivery line and a water pump, and which is particularly suitable for carrying out the aforementioned method, a frequency generator, the frequencies between 100 kHz and 25 MHz generated, and these frequencies at least one AC probe supplies, wherein the at least one AC probe is disposed on the well filter or on or in the pump of the water conveyor system and generates AC fields in the region of the water inlet of the well filter or the pump.

With this device, the above advantages are realized.

Advantageously, the at least one alternating current probe is formed from a substantially circular or partially circular circumferential probe. In this case, it advantageously extends within the well filter or around the openings of the pump in order to influence the largest possible peripheral portion of the water supply to the well or to the pump.

Furthermore, it is advantageous that the at least one alternating-current probe is formed from a plurality of partial probes. This allows a relatively economical construction of the at least one AC probe and their action on specific areas.

Advantageously, at least one further AC probe is arranged on or in the riser of the water conveyor system. This can be the formation of blockages in the riser are also slowed down and the risers can be cleaned much faster and better after expansion due to reduced encrustations.

If necessary, further alternating current probes may be used, which are arranged at the points liable to be blocked, in particular in the well filter and in the pump and riser region.

In a preferred embodiment, the frequency generator is connected via a first electrical connection line with the at least one alternating current probe and via a second electrical connection line with the current-conducting tube tour of the well construction or the pump. Alternatively, a ground can be made via a Erdsprieß. This advantageously creates a secure connection between the frequency generator and the alternating-current probe, wherein further influences from the outside can be substantially avoided. This is particularly advantageous for deep wells or deep wells, whereby their monitoring can be reduced to a minimum. The connection of the connecting lines is preferably completely waterproof.

Alternatively, the AC probe may effectively serve as an antenna in the aqueous medium which receives and forwards the frequencies generated by the frequency generator.

When using electrical connection lines has advantageously shown that a particularly secure transmission of the frequencies or a secure connection of the frequency generator with the AC probe by coaxial cable, in particular water-resistant (seawater resistant) coaxial cable is achieved. Furthermore, it is advantageous that the generation of the frequencies which are transmitted to the at least one alternating-current probe takes place cyclically, ie. h., That cyclically the different generated frequencies are applied via the AC probe to the corresponding areas.

The duration of a cycle is advantageously between a few milliseconds and several minutes. As often different types of bacteria in the Verockerungsprozessen In this way, exposure time and frequency can be optimized for each individual species.

Further details and features of the present invention will become apparent from the following description according to embodiment of the present invention. It should be noted that the invention is not limited to these embodiments.

Fig. 1

eine schematische Prinzipansicht der erfindungsgemäßen Vorrichtung zur Verlangsamung der Bildung von Verockerungen in einem Brunnensystem; und

Fig. 2

in vergrößerter Darstellung den Bereich der Unterwasserpumpe der Vorrichtung von Fig. 1.

In the attached drawing shows:

Fig. 1

a schematic schematic view of the device according to the invention for slowing down the formation of blockages in a well system; and

Fig. 2

in an enlarged view the area of the underwater pump of the device of Fig. 1 ,

In the figures, like elements are designated by the same reference numerals.

In Fig. 1 the device according to the invention for slowing down the formation of blockages in water systems is illustrated by the example of a well system with reference numeral 1. The device 1 is arranged in a well or well construction 2, which has a borehole wall 4. From the top of the well construction 2, a barrier tube 5 is inserted, which surrounds a arranged in the upper region of the well structure full pipe 7. The locking tube 5 extends along the borehole wall 4th

In the well below the full tube 7, a filter tube 9 is arranged, can penetrate through the water in the interior of the tube. This filter tube opens up one or more aquifers of the aquifer. When the pump is operated in the well system, the hydraulically active inlet areas of these groundwater horizons are activated and the groundwater flows from the aquifer to the well.

Between the borehole wall 4 and the tubes 7 and 9 is in the usual way filter gravel 11. The filter tube 9 and the filter ring located in the outer annulus 11th prevent sand and other particles in the aquifer from being carried.

Within the tubes 7 and 9, an underwater pump 13 is arranged centrally about an axis 14, to which a riser 3 connects as a water delivery line, from which according to arrow 19, a drainage with appropriate underwater pump operation. The promotion of the water is carried out in the usual way via pump pressure levels 17 in the underwater pump 13, which are able, the water ausr ggflls. to promote considerable depth to the surface.

To slow down the formation of blockages, the device according to the invention has a frequency generator 23 which generates frequencies between 100 kHz and 25 MHz and supplies these frequencies to at least one alternating-current probe 31. The frequency generator 23 is advantageously arranged outside of the well shaft 2 and above the terrain upper edge 21. Of course, there is also the possibility of placing it sunk in the ground next to the well extension 2.

How out Fig. 1 and 2 can be seen, the AC probe 31 is divided and has two partial AC current probes, which may be formed, for example semicircular (not shown). How out Fig. 2 It can be seen more clearly that the partial alternating current probes 31 are located in the vicinity of the pump inlet 15 of the underwater pump 13, which has an inlet sieve 33, through which the inflow of water according to arrow 35 takes place. Alternatively, multible probes, for example, can be installed at the main inlet horizons of the well filter, eg suspended or with non-conductive supports (a kind of centering).

From the FIGS. 1 and 2 It can be seen that between the frequency generator 23 and AC probe 31, a first connecting line 27 is provided, and from the connecting line 27, a second connecting line 29 for connection or pump housing or well removal, if current-conducting, is provided. The frequency generator is in turn fed via a supply line 25 with corresponding energy, for example, normal alternating current of 230 V / 50 Hz.

Thus, with the present method and apparatus, there is a slowing of the formation of blockages in water delivery systems, in particular achieved vertical or horizontal well systems, which costly maintenance can be significantly reduced, which not only slows the Verockerungen is achieved, but also the detachment of the resulting blockages on the individual components such as well filters, pump and risers, can be done much easier because much less Encrustations arise.

LIST OF REFERENCE NUMBERS

1 -

Device for slowing down the formation of blockages

2 -

well construction

3 -

Water delivery pipe

4 -

borehole wall

5 -

locking tube

6 -

well construction

7 -

full pipe

9 -

filter pipe

11 -

filter gravel

13 -

Unterwasserpumpe

14 -

axis

15 -

pump inlet

17 -

Pump pressure levels

19 -

Arrow of water drainage

21 -

ground level

23 -

frequency generator

25 -

supply line

27 -

first connection line

29 -

second connection line

31 -

AC probe

33 -

strainer

35 -

Arrows water inflow

Claims (12)

1. Process for slowing down the formation of deposits in water pumping systems (2), comprising a water pumping line (3) and a water pump (13), in which a frequency generator (23) is used to generate frequencies within the range of 100 kHz and 25 MHz, whereby these frequencies are delivered by means of at least one AC probe (31) so that the latter takes on the function of an antenna in order to generate AC fields at the required points of the affected parts,
   whereby the generation of the different frequencies, which are delivered by at least one AC probe, is effected cyclically, and
   whereby, by means of this at least one AC probe (31), the areas in which such deposits have built up in the area of a filter section, the pump (13) and/or the water pumping line (3) of the water pumping system can be impacted by the frequencies generated by the frequency generator (23).
2. Process according to Claim 1 above, characterised in that the water pumping systems (2) are systems of wells.
3. Device (1) for implementing the process according to either Claim 1 or Claim 2 above for slowing down the build-up of deposits in water pumping systems (2), which comprise a filter section, a water pumping line (3) and a pump (13) for pumping the water, with
   a frequency generator (23), which is designed to generate frequencies within the range of 100 kHz and 25 MHz and to deliver such frequencies to at least one AC probe (31), so that the latter takes on the function of an antenna in order to generate AC fields at the required points of the affected parts,
   whereby the frequency generator (23) is designed in such a way that the generation of the different frequencies, which are delivered to the at least one AC probe (31), is effected cyclically, and
   whereby the at least one AC probe (31) can be placed in the area of the filter sections, the pump (13) and/or the water pumping line (3) of the pumping system.
4. Device according to Claim 3, characterised in that the at least one AC probe (31) is formed from a rotating probe that is essentially circular or partially circular in shape.
5. Device according to Claims 3, characterised in that the at least one AC probe (31) is formed from a number of part probes.
6. Device according to any of the preceding Claims 3 to 5, characterised in that the frequency generator (23) is connected by means of a first electrical connecting line (27) with the at least one AC probe (31) and can be connected by means of a second electrical connecting line (29) of the device to an electrically conductive pipe passage of the well construction or to the pump.
7. Device according to any of the preceding Claims 3 to 6, characterised in that the frequency generator (23) delivers the frequencies by means of a coaxial cable to the at least one AC probe (31).
8. Device according to the preceding Claim 6, characterised in that the first connecting line (27) is in the form of a water-resistant coaxial cable.
9. Water-pumping system that comprises a well, a water pumping line (3), at least one filter section, a pump (13) with a water supply (15) and a device (1) according to any of the preceding claims 3 to 8, whereby:

   the AC probe (31) is arranged in the vicinity of the filter section, the pump (13) and/or the water pumping line (3).
10. Water-pumping system according to the preceding Claim 9, characterised in that the device (1) comprises at least one further AC probe, which is located in the vicinity of the filter section, the pump (13) and/or the water pumping line (3).
11. Water-pumping system according to the preceding Claim 10, characterised in that the frequency generator (23) is connected by means of a second connecting line (29) to an electrically connective pipe passage of the well construction (2) or the pump (13).
12. Water-pumping system according to the preceding Claim 11, characterised in that the second connecting line (29) is in the form of a water-resistant coaxial cable.

Images