EP2329082B1 - Waste water lifting device - Google Patents

Description

The invention relates to a wastewater lifting plant, with at least one bulk material collecting container with at least one arranged in its interior separating wire for thereby leading to and polluted waste materials wastewater, and at least one downstream of the bulk material collecting tank pump, which via at least one connecting line with shut-off with the Blocking container or regularly a barrier-contaminated container portion of the bulk material collecting container is connected, wherein the shut-off device is designed as a combined shut-off / screening device.

In a sewage lifting plant according to the structure described in the introduction after DE 1 609 166 B1 The aim is to ensure maintenance and trouble-free operation. For this purpose, the equipped with a rake check valve is designed as elastic, horizontally arranged in the closed state and downwardly opening floating flap. The individual computing bars of the rake fill only a part of the cross section of a connecting line. Overall, the rake is provided on the side of the bulk substance collecting space with the non-return valve which covers the cross-section of the rake which is kept free of the rake bars.

Regardless of this, a wastewater lifting plant will be part of the DE 196 50 625 C1 described in which outlet openings of a collecting container by closing devices depending on the respective operating state (on / off) are enabled or disabled. This should ensure a safe operation even in overload operable attack large amounts of wastewater with respect to the opening and closing of the outlet openings.

Another sewage lifting plant will be in the EP 1 108 822 B1 or even the FR 752 942 A described. Comparable sewage lifting systems - but without separation screen - are the subject of, for example, the EP 0 846 810 A2 ,

Wastewater lifting plants are generally used to raise waste water collected at the end of a wastewater storage space to a certain level. This is done in order to be able to treat the wastewater, for example, in a remote and higher-level wastewater treatment plant on. In the past, at this point, one has mostly worked with large pumps in order to be able to transport the solids present in the wastewater. However, such pumps can not convince in terms of efficiency ago and require relatively much drive energy, which is particularly disadvantageous today.

In the sewage lifting systems according to the genus is generally worked on the principle of separation of solids from the fluid before this fluid enters the pump used. In contrast, the solids are retained in the upstream of the pump bulk material collection container using the separation screen existing there. As a result, only pretreated wastewater is transferred to a liquid collecting tank connected downstream of the bulky waste collecting tank.

This pre-treated wastewater can now be processed easily with the help of the pump and in particular be raised to the desired level. In this process, at the same time, the solids retained by the separation screen are released from it. As a result, therefore, the pump must be designed only for the pre-treated wastewater, thus can be designed much smaller than without upstream bulk storage container. Thereby Not only is the efficiency increased, but in particular the operating costs for such pumps can be kept low.

The generic state of the art has proven itself in this respect. However, problems may occur in the event of a large amount of sewage with solids in it. Because in such a case, there is a risk that the separation screen is covered relatively quickly with solids and thus clogged. As a consequence thereof, the bulk material collecting container runs into an upstream feed distributor and / or the pump is prematurely started without the liquid collecting container being full. The functionality is then not or only very limited. Here the invention aims to a total. Remedy.

The invention is based on the technical problem of further developing such a wastewater lifting plant in such a way that even large amounts of waste water with solids therein are controlled.

To solve this technical problem, a generic sewage lifting plant is characterized in the invention in that the separating screen and the shut-off / sieve are arranged at an angle to each other, the shut-off / sieve together with a connection flange and the separating screen forms a structural unit. According to a preferred embodiment, the dividing screen and the shut-off / screening device are arranged substantially perpendicular to each other.

That is, the shut-off device located in the connecting line not only ensures that the wastewater contaminated with blocking substances does not get into the liquid collecting container and thus the associated pump. Rather, the shut-off device according to the invention is flanked by an associated screening device, so that the combined shut-off / screening device only pre-treated wastewater in the liquid collecting container passes through the connecting line.

According to the invention, therefore, the contaminated wastewater with wastewater is not only passed through the separation screen inside the bulk material collection container, but also passes through the shut-off / screening device in said liquid collecting container. As a result, the feed of prepurified wastewater into the said liquid / collecting container is ensured even if, for example, the separating sieve located inside the bulk material collecting container is so heavily occupied by solids that no further filtering action is observed.

According to the invention the combined shut-off / screening device is designed as a structural unit of at least one butterfly valve and a sieve. The sieve can also act as a stop for the butterfly valve. As a rule, the butterfly valve is a non-return valve, which is closed at the wastewater inlet.

The sieve is usually composed of one or more webs. These webs are usually placed at the edge of an opening associated with the butterfly valve. This opening is generally found in the bulk material collection container, in its barrier loaded (container) area above the separation screen. In the opening opens the connection line. On the other hand, below the separating sieve, a barrier-free (container) region is realized, which is connected to the pump via a bypass designed as a bypass, just like the connecting line. However, the procedure can also be reversed, as with reference to the description of the figures ( Fig. 5 ) will be explained in more detail. - In this case, the opening below the dividing screen is again in the barrier-contaminated area arranged. Above the dividing screen, on the other hand, there is the non-barrier area.

Overall, it has been proven that the shut-off screen device is arranged inside the bulk material collection container, and that regularly in its Sperrstoffbelasted area. In addition, the above-mentioned and designed as a bypass derivative can be integrated into the bulk material collection container. This applies in addition and optionally also for the connection line. Then the pump can be flanged on the outside of the bulk material collecting container. This results in a particularly compact design with the simultaneous possibility of easy replacement.

So that both the shut-off / screening device and the separating screen retain solids of comparable size, these are adapted to one another from their opening cross-section. This opening cross-section is also consistent with a passage of the pump. As a result, the shut-off / screening device and the separating screen ultimately provide the passage of the pump and thus the detail design of the pump and in particular its efficiency.

Moreover, it has proven useful if the shut-off / screening device form a structural unit together with a closure flange and possibly the separating screen. In fact, the dividing screen is usually but not necessarily arranged obliquely in the bulk material collecting container. As a result, the dividing screen can be easily fixed to said end flange or side flange of the bulky waste collection container. For this purpose, the end flange or side flange may be equipped with Abstützstegen or support webs, which carry a flanschfernes end of the Trennsiebes. The flanschnahe end of the Trennsiebes, however, is connected to the said end flange or side flange.

In any case, this maintenance and possibly repair work can be controlled very easily. For this purpose, it is only necessary to remove the end flange or side flange of the bulk material collection container. This gives an operator immediate access to the inventive and combined shut-off / screening device and also to the separating screen. These can therefore be easily cleaned and / or replaced if necessary.

As a rule, the butterfly valve is connected via a joint to the bulk material collecting container or the end or side flange. The joint may be a hinge or a rubber hinge. In the latter case, the butterfly valve is usually covered by a coating, namely a plastic or rubber. As a result, the butterfly valve is protected from corrosion from the outset.

In general, the butterfly valve has a stop which limits its opening angle in the sewage pumping operation. This ensures that the butterfly valve is immersed in the stream from the pre-treated wastewater, which by means of the pump from the liquid collecting container on the one hand in the non-barrier container area (via the discharge designed as a bypass) and on the other hand the barrier-contaminated container area (via the connecting line) promoted becomes. As a result, both screens, that is, both the separating screen and the sieve of the combined shut-off / screening device are rinsed in the waste water conveying process and freed from any solids which may adhere thereto.

As a result, a sewage lifting plant is provided, which is also able to process large quantities of wastewater contaminated with wastewater. This is not only due to the fact that practically two sieves are used instead of one sieve. Rather, join these Also, as it were, separate lines are added to both sieves, which in each case connect the bulk material collecting container to the pump and ultimately to the liquid collecting container. Thus, the pre-treated wastewater guided through the separating sieve inside the bulk material collecting container is supplied via the discharge or the bypass of the pump. In addition to this, the combined shut-off / screening device according to the invention, in conjunction with the connected connecting line, ensures that the wastewater pre-cleaned reaches the pump and, finally, the liquid collecting container. Consequently, two screens with two separate lines are available according to the invention, both communicating with the pump and finally with the liquid collecting tank.

In addition, the dividing screen inside the bulk material collecting container and the screen of the combined shut-off / screening device are arranged substantially at right angles to one another. In fact, the dividing screen has a horizontal or nearly horizontal arrangement in the interior of the bulk material collecting container and subdivides the bulk material collecting container into the container region which is loaded with a barrier substance and the container region which is impermeable to packaging. In contrast, the sieve of the shut-off / screening device has a more or less vertical arrangement. This ensures that the sieve of the shut-off / screening device still works reliably and performs its function even if the separating sieve should already be occupied by solids due to gravity and clogged. Because of the more or less vertical arrangement of this sieve solids can not adhere to it by gravity.

In addition, the opening cross-section of the screen of the combined shut-off / screening device can be made variable within certain limits. Because in contrast to the separation screen, which generally as a perforated plate is executed, the screen of the shut-off / screening device consists of one or more webs, which are arranged at the edge of the opening in the bulk material collecting container.

This opening is usually found in the end flange or side flange, in the barrier-contaminated container area. From this opening, the wastewater pre-cleaned through the sieve passes directly into the connecting line connected to the opening and then the pump.

In any case, the webs surrounding the opening at the edge can in principle be arranged at different distances from each other. Moreover, it is possible and within the scope of the invention that a wedge-like or triangular opening cross-section is set in side view. This can be realized when the shut-off flap is not exactly aligned vertically in its closed and applied to the webs position, but has a predetermined by the webs and certain skew. As a result of this triangular opening cross section, the passage of solids is favored and facilitated, which are designed smaller than the maximum opening cross-section. As a result, the functionality is further increased in combination with the other aspects.

As a result, a sewage lifting plant is provided, which has a particularly functional design. In fact, there is no longer a risk of blockage even with large amounts of sewage. Nevertheless, the pump used is effectively protected from coarse solids, at least those that are retained by the shut-off / screening device, respectively the separation screen. This allows you to work with pumps that have a relatively small passage have, therefore, with a particularly high efficiency and accordingly low energy work. Here are the main benefits.

Fig.

1 eine erfindungsgemäße Abwasserhebeanlage schematisch beim Zulauf des Abwassers,

Fig. 2

den Gegenstand nach Fig. 1 bei der Trennung der Sperrstoffe,

Fig. 3

die Abwasserhebeanlage nach den Fig. 1 und 2 beim Abwasserfördervorgang,

Fig. 4

den Seiten- bzw. Abschlussflansch für den Sperrstoff-Sammelbehälter im Detail und

Fig. 5

die Abwasserhebeanlage nach den Fig. 1 bis 4 in einer abgewandelten Ausführungsform.

In the following the invention will be explained in more detail with reference to a drawing showing only one exemplary embodiment; show it:

FIG.

1 a wastewater lifting plant according to the invention, schematically at the inlet of the wastewater,

Fig. 2

the object after Fig. 1 in the separation of the barrier materials,

Fig. 3

the wastewater lifting plant after the Fig. 1 and 2 in the sewage production process,

Fig. 4

the side or end flange for the bulk material collection container in detail and

Fig. 5

the wastewater lifting plant after the Fig. 1 to 4 in a modified embodiment.

In the Fig. 1 shows a wastewater lifting plant with the essential components, which is largely the same as that described in the introduction EP 1 108 822 B1 is explained. The sewage lifting plant shown may be located in a sewer well, not explicitly shown, preferably at its lowest point. The wastewater shaft can be made of plastic, stone, steel or similar materials.

The basic structure of the sewage lifting plant includes an inlet manifold 1, on which wastewater in the Fig. 1 is fed from the left. This wastewater is contaminated with blocking substances or solids F, which are primarily in the Fig. 2 are shown. From the inlet manifold 1, the wastewater passes through a supply line 2 in a bulk material collecting container 3. In the bulk material collecting container 3, the wastewater is freed from the blocking substances F and undergoes a pre-cleaning.

The prepurified wastewater passes via a discharge line 4 to a pump 5 and from there into a liquid collecting tank 6. For this purpose, the pre-cleaned waste water passes through the pump 5. This is possible because the pump in the exemplary embodiment is a centrifugal pump, which provides a corresponding passage or passage cross-section for the pre-treated wastewater.

For the pre-cleaning of the wastewater in the bulk material collection container 3 provide two facilities. On the one hand, a separating sieve 7 is responsible for this, which subdivides the bulky substance collecting container 3 into a region 3a which is contaminated with substances and a region 3b which is impermeable to the substance. As the name implies, the solids F are collected in the barrier-loaded region 3a and retained at this point by the separation screen 7.

For this separation screen 7 occurs on the other and according to the invention a combined shut-off / screening device 8, 9 added. The combined shut-off / screening device 8, 9 is associated with a connecting line 10 or part thereof. With the help of the connecting line 10, the pump 5 and consequently also the liquid collecting container 6 is connected to the area 3b of the bulky substance collecting container 3 which is loaded with the substance.

The combined shut-off / screening device 8, 9 is designed as a unit consisting of a shut-off valve 8 and a sieve 9. In this case, the sieve 9 - like the separating sieve 7 - ensures that the solids F are retained in the substance-contaminated area 3 a of the bulky substance collecting container 3. It can be seen that the separating screen 7 is arranged substantially horizontally or slightly obliquely with respect to the horizontal. In contrast, the sieve 9 of the shut-off / screening device 8, 9 has a more or less vertical arrangement, so that the separating sieve 7 and the sieve 9 of the combined shut-off / sieve device 8, 9 are arranged at an angle, in particular almost at right angles to each other. In this way, solids F can not lay by gravity on the sieve 9 and this, as it were - as the separating sieve 7 - close. Consequently, a pre-cleaning of the waste water takes place even if the separating sieve 7 should be blocked with solids F, namely through the sieve 9 of the combined shut-off / sieve device 8, 9.

In any case, the wastewater contaminated with the solids F not only passes through the separating sieve 7 but also through the shut-off / screening device 8, 9 or its sieve 9 into a region without blocking substances F, namely finally via the pump 5 to the liquid phase. 6. The two sieves 7, 9 or the separating sieve 7 and the sieve 9 of the combined shut-off / screening device 8, 9 are each designed so that they have an approximately equal (maximum) opening cross-section. This opening cross section is adapted to the passage or the passage cross section of the pump 5. This allows you to work with a pump 5 relatively high efficiency with low energy costs.

On the basis of a comparative analysis of the FIGS. 1 . 2 with the Fig. 3 it can be seen that the sieve 9 of the combined shut-off / screening device 8, 9 also acts as a stop for the butterfly valve 8. Actually it is at the shut-off valve 8 to a non-return valve, which at the waste water inlet (see. Fig. 1 and 2 ) closed is. In spite of this closed shut-off valve 8, the wastewater naturally passes through the sieve 9 via the connecting line 10 into the pump 5 and finally the liquid collecting container 6, specifically as pre-cleaned waste water.

In detail, the screen 9 is constructed of several webs 9 for this purpose. These webs 9 at least partially surround an opening 11 in a closure flange or side flange 12 of the bulk material collecting container 3 (cf. Fig. 4 ). In this case, the webs 9 may be arranged equidistant from each other, as in the Fig. 4 is shown. Through the opening 11, the pre-cleaned with the aid of the sieve 9 wastewater enters the connecting line 10 and the pump 5 finally in the liquid reservoir 6. Furthermore, a further opening 13 in said end or side flange 12 ensures that the with the help of the separating screen 7 pre-treated wastewater via the discharge line 4 and the bypass 4 finally also flows through the pump 5 into the liquid collecting container 6.

That is, both sieves 7, 9 hold back the solids F in the barrier-loaded region 3a of the bulk material collecting container 3. In this case, both sieves 7, 9 have their own connecting lines, on the one hand, the connecting line 10 and on the other hand, the derivative 4, by means of which they are connected to the pump 5 and finally the liquid collecting container 6. This ensures that even with clogging of one of the two screens 7, 9, the other unchanged provides for the pre-cleaning of the wastewater and can also provide.

In the sectional view to Fig. 4 can still be seen that the butterfly valve 8 in a variant not vertical but obliquely to the one or the plurality of webs 9 of the filter 9 abuts in the closed state. As a result, the screen 9 of the combined shut-off / screening device 8, 9 is designed with different opening cross-sections, which in some cases have a triangular shape. This aspect facilitates the passage of the solids F having a smaller cross section than the maximum opening cross section through the said sieve 9, whereas the solids F of larger cross section are reliably retained. Furthermore, you can see in the sectional view Fig. 4 in that the shut-off / screening device 8, 9 together with the closure flange or side flange 12 and the separating sieve 7 form a structural unit 7, 8, 9, 12. For this purpose, a flange-side edge of the separating screen 7 is connected to the end or side flange 12. In contrast, a flange-remote edge of the separating screen 7 is supported on support webs 14, which in turn are connected to the end or side flange 12. In this way, the dividing screen 7 experiences the inclined position shown in the embodiment with respect to the horizontal, which of course is not mandatory. In any case, the said assembly 7, 8, 9, 12 can be removed and cleaned from the bulk material collection container 3 without problems and in total, or repaired if necessary.

It can be seen that the butterfly valve 8 is connected via a hinge 15 to the bulk material collecting container 3, respectively, the end flange 12. In this joint 15 may be a conventional mechanical hinge or a rubber hinge, which uses the Gummigelenkigkeit of the butterfly valve 8 a total enclosing rubber sheath 16. In this case, the joint 15 is designed to be non-rotatable, the butterfly valve 8 is connected with its rubber sheath 16 as it were firmly attached to the end flange 12.

Not shown is the possibility to integrate the connecting line 10 and / or the discharge respectively the bypass 4 in the bulk material collecting container 3. In this case, the pump 5 can be connected directly to the end flange 12.

The end flange 12 opposite empties into the bulk material collecting tank 3 is still a pressure line D, at the end of which may already be mentioned in the introduction wastewater treatment plant. The sewage lifting plant shown is constructed so that each of the assemblies shown two assemblies are realized, which are in the drawing plane one above the other in practice. In this respect, the comments on the EP 1 108 822 B1 to get expelled. Incidentally, the sewage lifting plant is mainly made of stainless steel, which of course also represents only one option.

The operation is as follows. As part of the presentation after Fig. 1 Wastewater is fed via the feed distributor 1 and the supply line 2 in the arrow direction. In this case, located in the supply line 2 flap 17 is opened. This contaminated with solids F wastewater now passes into the bulk material collecting container 3 as shown Fig. 2 ,

In the bulk material collecting container 3, the solids F are retained in the barrier-loaded region 3a. This is ensured by the two sieves 7, 9 or the separating sieve 7 and the sieve 9 of the combined shut-off / sieve device 8, 9. Precleaned waste water thus arrives in the impermeable area 3b of the bulky substance collecting container 3 and from there through the opening 13 in the discharge 4 and finally via the pump 5 in the liquid collecting container 6. In addition, the pre-treated wastewater is separated from this and independently via the opening 11 in the connecting line 10, from there again into the pump 5 and finally the liquid collecting container. 6

It can be seen that the opening 13 of the discharge line 4 is assigned to the non-barrier region 3b of the bulky substance collecting container 3. In contrast, there is the opening 11 of the connecting line 10 in the contaminated area 3a of the bulk material collecting container 3. In this process, the butterfly valve 8 of the combined shut-off / screening device 8, 9 is closed and the pump is not actuated.

As soon as a certain level of liquid is reached in the liquid collecting container 6, the starts in the Fig. 3 illustrated lifting process of the wastewater. The pump 5 now conveys the prepurified wastewater from the liquid collecting container 6 via the discharge or the bypass 4 on the one hand in the non-barrier area 3b of the bulk material collecting container 3 and on the other hand via the connecting line 10 and the shut-off / screening device 8, 9 in the In this process, the butterfly valve 8 is opened as far as in the Fig. 3 is shown.

In fact, the butterfly valve 8 regularly has an only indicated stop 18, which limits its opening angle in this sewage production process. This ensures that the shut-off flap 8 is freed during conveying of the pre-cleaned wastewater of optionally adhering thereto solids F. The same applies to the sieve 9 of the shut-off / screening device 8, 9. In addition, the retained by the separating sieve 7 solids F are detached from this and ultimately conveyed via the pressure line D to the wastewater treatment plant. Because also as a check valve executed shut-off valve 17 in the supply line 2 is closed during operation of the pump 5 and the described sewage pumping operation.

The variant after the Fig. 5 the wastewater lifting plant differs from the previously described embodiments according to the Fig. 1 to 4 merely in that the separating screen 7 is placed above the shut-off / screening device 8, 9. In contrast, the separation screen 7 is found in the example of the Fig. 1 to 4 below the shut-off / screening device 8, 9. However, nothing changes in the basic mode of operation. Because the separation screen 7 and the shut-off / screening device 8, 9 continue to work combinatorial together, in the same way as already with reference to the Fig. 1 to 4 was explained.

That is, the loaded with solids F wastewater passes not only on the separating sieve 7, but also through the shut-off / sieve 8, 9 unchanged in an area without substances F, namely in the liquid collecting container 6, on the one hand, the connecting line 10 and on the other hand, the opening 13 and the bypass 4. Through the opening 13 passes through the pre-cleaned with the help of Absperr- / Siebeinrichtung 8, 9 wastewater into the connecting line 10. In contrast, the pre-cleaned by the separating sieve 7 enters directly into the connecting line 10 a and arrives in total from there into the liquid collecting container 6.

As soon as a certain level of liquid is reached in the liquid collecting container 6, the reference begins for Fig. 3 already described lifting process of the waste water analog. In fact, the pump 5 conveys the pre-treated wastewater from the liquid collecting container 6 on the one hand via the discharge or the bypass 4 and the shut-off / sieve 8, 9 in the contaminated area 3a of the bulk material collecting container 3. On the other hand the promotion of prepurified waste water via the connecting line 10 in the non-barrier area 3b of the bulk material collection container. 3

In this process, a total of the butterfly valve 8 is freed of optionally adhering thereto solids F. The same applies to the sieve 9 of the shut-off / screening device 8, 9 and also the separating sieve 7. Because of this, solids retained thereon are dissolved and finally conveyed via the pressure line D to the wastewater treatment plant. Because in the described lifting operation, the butterfly valve 17 is closed (see. Fig. 3 ). In this respect, reference is made to the above statements.

Claims (14)

1. Wastewater raising device, having at least one bulky-material, collecting vessel (3), having at least one separating screen (7) which is arranged in its interior for wastewater which is to be guided through it and is loaded with bulky materials (F), and having at least one pump (5) which is arranged downstream of the bulky-material collecting vessel (3) and is connected via at least one connecting line (10) with a shut-off device (8, 9) to the bulky-material collecting vessel (3),

   - the shut-off device (8, 9) being configured as a combined shut-off/screen device (8, 9), and

   - the separating screen (7) and the shut-off/screen device (8, 9) being arranged at an angle with respect to one another,

   characterized in that,

   - together with a blind flange (12) and the separating screen (7), the shut-off/screen device. (8, 9) forms one structural unit (7, 8, 9, 12), with the result that

   - the structural unit (7, 8, 9, 12) can be removed and cleaned without problems and as a whole from the bulky-material collecting vessel (3), and can be repaired if required.
2. Wastewater raising device according to Claim 1, characterized in that the separating screen (7) and the shut-off/screen device (8, 9) are arranged substantially at right angles with respect to one another.
3. Wastewater raising device according to Claim 1 or 2, characterized in that the shut-off/screen device (8, 9) is configured as a structural unit comprising a shut-off flap (8) and a screen (9).
4. Wastewater raising device according to Claim 3, characterized in that the screen (9) acts at the same time as a stop for the shut-off flap (8) which is designed as a non-return flap and is closed during the wastewater inflow.
5. Wastewater raising device, according to Claim 3 or 4, characterized in that the screen (9) is assembled from one or more webs (9) which are arranged on the edge side of an opening (11) which is assigned to the shut-off flap (8).
6. Wastewater raising device according to one of Claims 1 to 5, characterized in that the shut-off/screen device (8, 9) is arranged in the interior of the bulky-material collecting vessel (3).
7. Wastewater raising device according to one of Claims 1 to 6, characterized in that the shut-off/screen devise (8, 9) is arranged in the interior of a region (3a) of the bulky-material collecting vessel (3), which region (3a) is loaded with bulky materials.
8. Wastewater raising device according to one of Claims 1 to 7, characterized in that the shut-off/screen device (8, 9) and the separating screen (7) have an opening cross section which is adapted to one another and to a passage of the pump (5).
9. Wastewater raising device according to one of Claims 4 to 8, characterized in that the shut-off flap (8) of the shut-off/screen device (8, 9) is connected via a joint (15) to the bulky-material collecting vessel (3).
10. Wastewater raising device according to Claim 9, characterized in that the joint (15) is configured as a rotary joint or rubber joint.
11. Wastewater raising device according to one of Claims 4 to 10, characterized in that the shut-off flap (8) of the shut-off/screen device (8, 9) is equipped with a stop (18) which limits its opening angle during the wastewater conveying operation.
12. Wastewater raising device according to one of Claims 1 to 11, characterized in that the shut-off/screen device (8, 9) is enveloped by a coating (16).
13. Wastewater raising device according to one of Claims 1 to 12, characterized in that the pump (5) is connected, in addition to the connecting line (10), via a discharge line (4) which is configured as a bypass (4) to the bulky-material collecting vessel (3).
14. Wastewater raising device according to Claim 13, characterized in that the connecting line (10) and/or the bypass (4) are/is integrated into the bulky-material collecting vessel (3).

Images