DE2336059A1 - METHOD AND DEVICE FOR CONTROLLING Clogging of DRAIN LINES - Google Patents

Description

Application for patent and utility model my AktZo: 72.57 Twistringer RBM / Antoc

APPLICANT:

Twistringer RBM Dränfilter GmbH & Co ₀ JCG ₀ 2832 Twistringen, Am Bahnhof 54

INVENTOR:

1 "Johannes Bösice, 2849 Arkeburg

2 _O Hans Roess, 2832 Twistringen, Konrad-Adenauer-Str ■ 9

PRIORITY:

Austria - Aktz ": 13A 6171 / 72-3

Filing date: July 17, 1972

DESCRIPTION:

Method and device for combating constipation

Dr an 1 e i ts

The invention relates to a method and a device for combating the clogging of drainage pipes in drainage systems with soil components that tend to become clogged "

309886/0401

STATE OF THE ART

It is known that drainage pipes often lead to premature clogging, usually referred to as ocher formation, tend to be based on the transformation of water-soluble soil substances into water-insoluble, Oxides deposited on the wall parts of the drainage pipes and also in the drainage filter are returned. Against these processes an effective remedy has not yet been found, so that the premature failure of the drainage system due to excessive Had to accept ochering "

TASK

The invention is based on the object of a method and to create a device with which it is possible to prevent the drainage pipes from becoming clogged by clogging.

SOLUTION OF THE TASK

In solving this problem, the invention is based on consideration from the fact that the substances in the soil that would otherwise lead to clogging and which are carried along by the water donation are chemical-physical Influences would have to be subjected which prevent the clogging when entering the cavities of the drainage line or counteract a hardening that has already taken place. Based on this consideration, according to the invention, a die Clogging of the drainage pipes due to clogging of the mentioned soil components preventing reagent, preferably tannic acid, brought into the path of the water donation. To be as complete as possible Conversion of the anchoring substances that get into the cavities of the drainage with the water donation.

309886/0401

suffice, the reagent should be supplied in an excess of more than 50%, preferably 100 % and more over the stoichiometric amount. For this purpose, the supply of the reagent * can be controlled directly or indirectly by the water dispensing, on which the supply of the anchoring substances to the drainage is also dependent. The natural water dispenser VL. measured and the measured value used to control the reagent dispensing M ^, according to the equation

° k ° M * M.

XJx. JxJD W

k- the stoichiometric excess factor, preferably k .. = 2, k _ö the stoichiometric factor, which depends on the given soil conditions or the type of soil components that can be settled,
k is the solubility factor for the soil which can be anchored

components,
M “the amount of ocher substances in the soil

and
M _n - the water donation is.

For direct control or regulation of the reagent feed thanks to the natural water supply, a reagent dispenser can be installed in brought in the way of the water donation and introduced by means of extraction through the water donation itself, accordingly

3 0 98 8 fi / Π U Π 1

2336053

the equation

_ö * (k _1K / k _1R ) - MJ. [kg / m],

_1K / k _1R ) MJ. where k, "/ k is the ratio of the water solubility of ocher-

JLJv XIv

the components and reagent and M · the amount of the components in the Floor is.

The water solubility of reagent k can be determined in various ways and manner to be influenced; it is a function of several factors, essentially according to the equation

ν - ν · V ^a k
IR ~ IR Ti exp R extr '

where k · the solubility factor of the extracted reagent * k

XK. α exp

the exposure factor and k. the extraction factor of the Reagent carrier is »

The solubility factor k is as such a given, normally uncontrollable size. This solubility factor also depends on the temperature and how it is influenced However, one will regularly foresee, especially since the solubility factor k · for the components of the temperature influencing, if

it should only affect the reagent dispensing, but would have to be excluded "

On the other hand, the two factors Ic _x , and k, can be

Jx. GXp Iv GXTI3?

Appropriate measures ii) can be influenced over a wide range »

The exposure factor Ic ^ depends on the exposure of the tanning

Iv 6-X.p

acid carrier depends on the water donation and is caused by the

3098 86 / 0AOI

spatial arrangement of the parts of the Gerbsäureträgers, d _o h. their shape (thickness of the grain or fibers) and arrangement in the path of the water dispenser are determined. While the exposure of the soil components to the water dispenser is fixed, it is up to you to influence the reagent transfer from the reagent dispenser to a large extent by changing the exposure factor Iw,

-L \. fc-Λ IJ

ZoBo through an uneven, grid-like distribution across the and / or in the direction of the water flow “This is just for that To ensure that the soil components and reagents carried along come together effectively «

The extraction factor k_ depends when using in the Naturally occurring reagent carriers, such as mimosa bark, initially from the natural ones. Properties of the starting materials for the reagent dispenser depend on, but can also be achieved by suitable processing such as by impregnation with an extraction inhibiting impregnant. Furthermore is the extraction factor is subject to the free choice of the reagent dispenser. A mixture of different reagent carriers can also be used to optimally match the amount of reagent to the amount of reagent Amount of components that can be anchored can be promoted.

The amount of reagent extracted is also a function of time, as the extraction factor increases as the extraction proceeds decreases according to an exponential law, for example »The extraction curve is also dependent on the other properties of the tannic acid

309886/0401

dispensers, in particular on its particle size. this also applies to the extraction of the soil components, but in practice you are usually in the lower range of the exponential function, in contrast to the reagent dispenser, whose extraction curve is followed from the beginning. To all the same To ensure a lasting good effect, it is, as already stated above, correct to use a stoichiometric excess of the introduced reagent supply to work, so that despite excessive reagent delivery at the beginning also up to practically complete discharge of the ocher substances, which in the given case reaches drainage operation after 5 to 6 years may be, the stoichiometric amount of reagent required for full effectiveness is available. With new systems runs also the extraction of the soil components initially in the steep area of the extraction curve, so that you are here with a work smaller stoichiometric excess of the supply can.

If you bring the reagent into an area in which, with appropriately targeted exposure, it will be in the stoichiometric amount is dissolved and carried along by the natural water end, in this way an optimal utilization of the available amount of reagent can be achieved. One becomes expediently ensure that, taking into account the where appropriate different solubilities of reagent and anchoring substances the actual dissolution of the reagent

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substances due to physical influences, e.g. Adsorption forces and surface and, if necessary, structure design the reagent carrier, is controlled so that the stoichiometric Law is guaranteed as completely as possible with simple means. In general, this will already be reflected in the appropriate Arrange the arrangement of the reagent carrier in the drainage area. On the other hand, tannic acid donors are cheap and available in sufficient quantities, so that it is advisable to use one of these high reagent excess of z »B« 100% and more to work that the stoichiometric amount even under unfavorable conditions is ensured over the entire service life of the drainage system "

A good fit of the extraction curve can be achieved by simultaneous Use of reagent dispensers with different extraction processes, e.g. with reagent dispensers of different particle sizes, be achieved",

If necessary, it will be useful, but not the drainage line to be supplied with a sufficient supply of reagent for the entire service life when laying, but rather in To bring partial storage quantities into the drainage area at intervals. This can be done, for example, by injecting the reagent into the drainage area, by the soil in the drainage area or the filter ceiling, as far as the drainage pipe is provided with a filter with which the reagent is inoculated-

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The reagent can be introduced with a reagent carrier in front of or in the ocher zone in the drainage flow area, namely a natural reagent carrier or a carrier artificially loaded with the reagent. As reagent carrier, the drainage pipes of the drainage pipe can be used by them to be loaded with appropriate training, z "B _o by impregnation, with the reagent.

Finally, according to the new process, a regenerative Reagent can be introduced to regenerate drainage pipes that are already ossified. Has to regenerate Various grain sizes of dolomite rock proved to be useful. Such a reagent can use water as the reagent carrier, preferably in the backwash process.

Reagent dispensers are preferably attached in the drainage filter, for example in the form of an inner layer of a monkey-shaped one Filters »The reagent sparger can also consist of inclusions containing reagent exist in the drainage filter «It is also possible to install one or more reagent dispensers in the cavity of the drainage line, e.g. in the form of an inner coating of the drainage line or in the form of water-permeable plugs in the cavity of the Drainage pipe.

The so-called suckers of the drainage line are particularly suitable for the subsequent introduction of reagent dispensers.

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It is particularly advantageous to use a fibrous reagent dispenser or granular reagent-containing bulk material, which is either in loose form in the casing of the drainage line or in the The soil is introduced or shaped into more compact shaped bodies, preferably in the form of mats or rods.

The reagent can be made from natural or synthetic tannic acid exist. Natural products containing tannic acid are usually already in fibrous or fibrous form, be it from extraction or processing granular structure, so that they are suitable for use for tannic acid paider according to the invention without further processing. For most applications, natural tannic acid dispensers with a relatively high tannic acid content will be preferred, such as Mimosa bark or catechu, waste materials from tea production or quebracho wood "

In the drawing, the invention is based on some exemplary embodiments illustrated. It shows

Fig _o 1 shows a drainage line with granular inclusions in the filter as a reagent dispenser,

2 shows a longitudinal section through a drainage pipe in a second Embodiment with a granular reagent dispenser inserted into the filter jacket,

3 shows a modification of the embodiment according to FIG. 1,

4 shows a drainage line with a two-layer filter and an inner layer designed as a reagent dispenser,

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5 shows a method for inoculating the soil above the drainage line,

6 shows a method for inoculating the filter of the drainage line,

7 shows a drainage pipe with mat-shaped reagent dispensers above and below the drainage pipe,

8 shows a drainage pipe with a reagent-containing inner coating,

9 shows a drainage pipe with a stopper-shaped reagent dispenser, 10 shows a drainage eater with a reagent dispenser,

11 shows a reagent dispenser designed as a drainage pipe connector,

FIG. 12 shows a modification for a drainage pipe connector according to FIG. 11.

In the embodiments of FIGS. 1 to 3, 1 is a corrugated Plastic drainage pipe, which is in the usual way in the area of the wave base 2 is provided with inwardly leading holes 3 for water flow. The drainage pipe 1 is enclosed by a drainage filter 4, Various examples are shown for its execution in the drawing.

Fig. 1 shows a drainage filter with a homogeneous filter layer 5 made of granular, tannic acid-containing filter material, for example from Quebracho! Wood, with an average grain size of 1 mm. The filter layer 5 consists of a relatively loose one

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Filling, so that there is an advantageously large ratio of the mean filter area F to the total cross section Q of the water-carrying pores or channels between the grain particles of the filter substance of, for example, 1: 0.4. The layer thickness d is dimensioned in such a way that there is a sufficiently long residence time T of the water from the entry on the outside 6 to the exit on the inside 7 of the filter layer . per unit length of the drainage pipe, the above-mentioned ratio p / Q of the mean filter area to the total pore cross-section and the layer thickness d _o Given the nature of the soil, as complete a prevention as possible of the clogging of the drainage pipes is achieved.

The reactivity of the reaction depends essentially on the Tannic acid content of the filter material and is further determined by the size of the available for the reaction Kornoberflache «The grain surface for its part, which is responsible for the Grain bulk increases with decreasing grain size, on the other hand it is limited by "the requirement of good water flow and thus more sufficient Pore sizeο For the purposes at hand, a average grain size of 0.2 to 3 mm proven to be useful « The optimal grain size also depends on the loading

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creation or origin of the tannic acid donor; in particular it will be chosen larger if the material is mainly obtained from the bark area of trees containing tannic acid. the beneficial effect of tannic acid is due to that under their influence, iron compounds are formed which do not result in clogging of the drainage pipe. The filter material can be made of granular or fibrous normal filter material 8 smaller and granular or fibrous filter material containing tannic acid 9 greater strength than reagent dispensers.

The cohesion of the fiI- " terschicht 5 is given in the embodiment of FIG. 1 by boundary layers in the form of perforated films 10 and 11, one inner film 10, which shields the water-conducting grooves 12 of the corrugated plastic pipe 1 from the filter layer 5 and keeps it free of filter material, and an outer film 11, which gives the drainage filter the outer support and forms the inlet side for the water flow.

The filter layer 5 with the foils 10 and 11 is used usual technical means applied.

The foils are shown schematically in the drawing. Your water through holes are actually much smaller, in order to in particular in the case of the inner film 10 shielding the channels 12 of the drainage pipe 1, a passage of filter material through

309886/0401

to prevent the film openings; also is the number of Foil holes per unit area much larger than is illustrated in the drawing "

Fig. 2 shows an embodiment in which granular, completely or partially reagent-containing filter material 8, 9 as a reagent dispenser “Also here the pores 14 are schematic for the sake of clarity It is advantageous in this case, too, to have a film 10 with fine perforations on the inside 7 of the filter layer 5 to be attached in order to prevent the passage of granular filter material from the pores 14 to the inside of the drainage pipe.

If the framework body 13 is sufficiently strong, it can itself serve as a drainage pipe, so that the filter layer 5 with its Inside, at the same time, delimits the water-bearing inner drainage channel.

The framework body 13 can be, for example, by loosely binding from sticky fibers, e.g. from sticky straw, either from the outset with granules or Fibers mixed as a reagent carrier or its relatively wide pores after formation of the framework body by flushing in granular filter material are filled. Also, natural reagent dispensers can themselves become a drainage pipe or full water-bearing Drainage strand can be formed.

309886 / 04Ö1

In the embodiment shown in FIG. 3, the filter layer is 5 bounded inside and outside by boundary layers in the form of straw layers 15 and 16, respectively. The two straw layers guarantee the advantage of particularly low entry and exit resistance and produce a sufficient delimitation of the inner filter layer 5 without the use of an additional film Drainage filter can be formed here as in the other examples from a prefabricated band-shaped filter mat, which (see Fig. 3), forming a longitudinal seam in the form of a joint 17, placed around the plastic drainage pipe 1 with the help of a covering nozzle and firmly connected to the drainage pipe 1 by a wrapping 18 will. This wrapping can consist of two cross-wound plastic threads 19, 20. With otherwise the same properties drainage filters can be used for soils of various types use different layer thicknesses d. A fabric or pile or some other sufficient layer can also be used as the boundary layer Holding layer, can be used. A reagent dispenser according to the invention can also be formed when laying of the drainage pipe, a loose bed of filter material containing tannic acid is introduced into the drainage ditch.

Fig. 4 shows an embodiment in which the drainage filter has two layers is formed, .iobei a more or less thin Inner layer 21 is made of fibrous material containing tannic acid, for example from quebracho wood or mimosa, while the stronger outer layer 22 consists of a filter material,

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as it is also used for the production of filters. It is preferably used in combination with a tannic acid Inner layer 21 is an outer layer 22 made of straw, which is expediently also fixed by wrapping 18.

In particular for the subsequent introduction of tannic acid or other reagents that come from natural water donation be dissolved and together with the ocher substances get into the drainage pipes, it is suitable to introduce the tannic acid in liquid form by inoculating the soil according to Fig. 5 or 6, whereby tannic acid is introduced into the immediate area of the drainage line itself or into the drainage filter with the aid of probes 23 will.

Fig. 7 shows a drainage line in which mat-shaped reagent dispensers 24 placed under the drainage pipes 1 or, if necessary also subsequently, over the drainage pipes 1 are attached.

With a corresponding affinity of ocher substances and Reagent it may also be appropriate to arrange the reagent in the cavity of the drainage pipes. Fig. 8 shows such an arrangement, in which the drainage pipes 1 are provided with a reagent-containing inner coating 25 "Fig. 9 shows an embodiment, in which the cavity of the drainage pipe 1, for example a clay pipe provided with longitudinal grooves 26 on the outside, with reagent-containing Carrier material in the form of a plug 27, preferably fibrous Nature, is filled.

309886/0 40 1

You can see the arrangement of the reagent dispensers all over the line run length continuously or reagent dispenser either only at the entrance of the line or distributed at intervals Install over the drainage line.

10 illustrates the arrangement of a reagent dispenser in the form of a filling with reagent-containing material 28 of a drainage swallower 27 ·.

In the case of drainage pipes which are composed of shorter pipe sections, in particular clay pipes, as shown in FIG. 11 is, the reagent dispenser be designed as a pipe connector in the form of a pipe plug 29, which consists of a middle disc-shaped Part 30 of a thickness corresponding to the thickness of the gap between the pipes ^ tfi the joint and two plug-shaped, there is a pin 31, 32 engaging in the tubes. The middle part 30 can be externally provided with bead-shaped projections or a Ring bulge. 33, but it can also, as indicated by dashed lines 34, have approximately the same diameter like the drainage pipes. The latter form is particularly suitable for mechanical laying of the drainage pipe.

FIG. 12 finally shows a reagent dispenser in the form of a filter ring 37 as an insert for a pipe connecting sleeve 36, such as it is used in particular for drainage pipes made of clay pipes, but in a similar form also for connecting plastic

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pipes is used. In drainage pipes from clay pipes flows the entire water dispensing through the filter rings 37 »In the case of drainage pipes made of plastic pipes, where only part of the If water dispensing occurs, use can also be made of stopper-shaped reagent dispensers, which, like the stopper 38 in FIG Fig "12, into which sleeves 36 can be inserted"

The reagent dispensers can be designed in such a way that, as is widely known for drainage filters, they consist entirely of degradable organic or partly of permanent synthetic and degradable organic material, as is the case with natural tannic acid donors, e.g. mimosa bark or quebracho wood.

Various modifications and other designs are possible within the scope of the invention; in particular, instead of Tannic acid also used other reagents that have a have a corresponding affinity for the substances that can be ossified in the soil. Choosing the right reagents This is best done on a case-by-case basis according to the result of a soil investigation on the type and amount of ocher substance en / meet.

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Claims (1)

2336053 PATENT CLAIMS: (1.! Procedure to combat the blockage of drainage pipes in Drainage systems with soil components tending to clog, characterized in that the drainage pipes are blocked by clogging of said soil components preventing reagent, preferably tannic acid, in the way of the water dispensing is brought in, 2. The method according to claim 1, characterized in that the reagent is supplied with an excess of more than 50%, preferably 100 % and more over the stoichiometric amount. 3. The method according to claim 1 or 2, characterized in that the introduction of the reagent ^{1 is} controlled indirectly and / or directly by the natural water donation. 4. The method according to claim 3, characterized in that the water dispensing M ^ measured and the measured value for controlling the Reagent dispensing is used, according to the equation B * where k »is the selectable excess safety factor of egk. = 2, k ... the intended stoichiometric factor, k _1K the solubility factor for the ochering soil components, M ^ p the amount of ochering substances in the soil and M-, which is the water donation. 309886/0401 2336053 Method according to claim 3, characterized in that a reagent dispenser is placed in the path of the water dispenser and is introduced by means of extraction by the water dispenser itself, according to the equation where k / k is the ratio of the water solubilities -of A-Jk. A.SS. ocher components and reagent and M · the amount of the components is in the ground. 6 "Method according to one of claims 2 to 5, characterized by introducing a tannic acid amount of more than 25 grams per meter of drainage pipe, preferably from 7'0 - 100 g / m " ο The method according to claim 5, characterized in that one The amount of reagent in reserve is sufficient for the service life of the drainage system is introduced into the drainage area " ο Method according to Claim 7, characterized in that at time intervals Partial storage quantities are introduced into the drainage area distributed over the service life of the drainage system, 9. The method according to any one of claims 5 to 8, characterized in that that the reagent is introduced into the drainage area by inoculation we do 309886/0401 -? 0 - ΙΟ »Method according to claim 9, characterized in that the Soil in the Dranflussberexch is inoculated with the reagent. 11. The method according to claim 10, characterized in that the reagent is applied to the soil surface. 12. The method according to claim 9, for drainages with a filter cover, characterized in that the filter cover is inoculated with the reagent. ο Method according to claim 5 to 8, characterized in that the reagent with a reagent carrier in the drainage area is introduced. 14o method according to claim 13, characterized in that a naturally occurring reagent carrier is introduced. 15. The method according to claim 13, characterized in that a Artificially loaded with the reagent carrier is introduced. 16. The method according to claim 15, characterized in that the or a part of the drainage pipes, for example by impregnation, with the Reagent to be loaded. 309886/0401 17 «Method according to claim 15, characterized in that a the antioxidant reagent, preferably dolomite, e.g. by rinsing with water as a carrier, preferably im Rewinding process, is introduced, 18. Drainage with device to prevent clogging according to, the method according to claim 1 to 17, characterized in, that a reagent dispenser connected or connectable to the drainage line, preferably a tannic acid dispenser, is provided. 19. Device according to claim 18, with drainage filter, characterized in that that a reagent dispenser (5,21) is attached in the drainage filter (4) is. 2Oo device according to claim 19, characterized in that a as the inner layer of a jacket-shaped drainage filter (4) designed reagent dispenser (21) is provided. 21. Device according to claim 20, characterized in that a is provided from reagent-containing inclusions (9) in the drainage filter (5) existing reagent dispenser. 22. Set up after. Claim 18, characterized in that a or several reagent dispensers in the cavity of the drainage line (1) are appropriate. 309886 / 04Ö1 23. Device according to claim 18 and 22, characterized in that -that reagent dispensers (28) are attached in swallowers (27) of the drainage line (1) » 24. Device according to claim 22, characterized in that tannic acid dispenser in the form of an inner coating (25) of the drainage line are provided 25. Device according to claim 18 and 22, characterized in that that the cavity of the drainage line (1) wholly or in parts with water-permeable stopper (27,32,33,36) as a tannic acid donor is filled out. 26. Device according to claim 18, characterized in that the or a part of the drainage pipes, e.g. by impregnation with tannic acid, are designed as reagent dispensers. 27. Device according to claim 18, characterized by reagent dispenser in the form of fibrous or granular reagent-containing bulk material. 28. Device according to claim 18, characterized by reagent dispenser in the form of water-permeable, mat-shaped or rod-shaped reagent carriers that can be introduced into the drainage area (24). 309886/0401 29. Set up after. Claim 18 to 28, characterized in that that the reagent contains natural tannic acid, 30. Device according to claim 18 to 28, characterized in that that the reagent contains synthetic tannic acid. 31. Device according to claim 30, characterized in that the The reagent dispenser contains a natural product containing tannic acid. 32o device according to claim 29, characterized in that the Reagent dispenser contains tannic acid-rich components of plants, especially trees. ο Device according to claim 32, characterized in that the Reagent dispenser contains mimosa bark » 34. Device according to claim 32, characterized in that the reagent dispenser contains catechu » 35. Device according to claim 32, characterized in that the reagent dispenser contains waste materials from tea production. 36. Device according to claim 32, characterized in that the reagent dispenser is quebracho wood or an extract from quebracho wood contains. 309886/0401 37o facility according to. Claim 30, characterized in that the Particles of the reagent carrier a thickness of 0.2 to 3 mm, preferably about 1 mm, 38o device according to claim 18, characterized in that one loose bulk layer (5) with reagent carrier between water-permeable boundary layers (6,7; 13; 15,16) of sufficient strength is held 39ο Device according to claim 18, 26 and 38, characterized in that that a filter material (8, 9) with a reagent dispenser (9) is embedded in a wide-pore framework (13). 40. Device according to claim 38, characterized in that a porous film (6, 7) is provided as the boundary layer. ο Device according to claim 38, characterized in that as Boundary layer a tissue is provided. 42. Device according to claim 38, characterized in that as Boundary layer a straw layer (15,16) is provided. 43. Device according to claim 38, characterized in that a boundary layer according to claim 40, 41 or 42 also serves as a shield is provided against the wave-shaped drainage pipe (1). 309886/0401 44. Set up after. Claim 38 to 43, characterized in that that the boundary layers (6,7; 15,16) like a mat with the inner FiIterschicht (5) are connected. 45. Device according to claim 38 to 44, characterized in that the filter layer (5) has a thickness that corresponds to the concentration is adapted to reagent. 309886 / 04Ö1