WO2018127327A1

WO2018127327A1 - Cleaning vehicle for tunnels

Info

Publication number: WO2018127327A1
Application number: PCT/EP2017/080253
Authority: WO
Inventors: Gerhard Mayerhofer; Erich Mayrhofer
Original assignee: Gerhard Mayerhofer
Priority date: 2017-01-05
Filing date: 2017-11-23
Publication date: 2018-07-12
Also published as: EP3565927B1; AT518651B1; EP3565927A1; ES2898079T3; AT518651A4

Abstract

Cleaning vehicle for tunnels having a travel drive (13), a washing liquid container (8), and a cleaning unit (1) which is connected to the washing liquid container (8) via supply lines (5) and which has cleaning brushes (3) and cleaning nozzles (4) for discharging the washing liquid against the tunnel inner wall, in which method it is proposed that there be provided a suction unit for the contaminated washing liquid that is connected to a sedimentation container (6) for precleaning the contaminated washing liquid, and the sedimentation container (6) is connected via a feed line (9, 15) for the precleaned washing liquid to a processing unit (11) for the precleaned washing liquid that comprises a flocculation stage (16) and a sedimentation stage (17) downstream of the flocculation stage (16), and a return line (10) for returning the cleaned washing liquid from the processing unit (11) into the washing liquid container (8) is provided. The cleaning vehicle according to the invention thus provides not only for the collection and processing of the contaminated washing liquid but also for the reuse thereof for tunnel cleaning, with the result that the cleaning of tunnel inner walls can be carried out more quickly and more cost-effectively.

Description

Cleaning vehicle for tunnels

The invention relates to a cleaning vehicle for tunnels with a travel drive, a washing liquid container, and a cleaning unit with cleaning brushes and cleaning nozzles connected to the washing liquid container via leads for dispensing the washing liquid against the tunnel inner wall, according to the preamble of claim 1.

Tunnel inner walls become increasingly dirty as the tunnel is used and must be cleaned at regular intervals. For this purpose, cleaning vehicles are known, which are provided with cleaning brushes and cleaning nozzles, the cleaning nozzles using high-pressure pumps spray a washing liquid under high pressure against the tunnel inner wall and clean the cleaning brushes the tunnel inner wall. For cleaning railway tunnels these are

Cleaning vehicles designed as rail vehicles.

The use of the washing liquid causes in practice but sometimes difficulties. On the one hand, large amounts of washing liquid, mostly water, have to be carried along,

On the other hand, the discharged washing liquid leads to a considerable wetting of the tunnel floor. On secondary lines of a rail network can be waited until the polluted washing liquid is seeped. On heavily used high-performance lines, the contaminated

Wash liquid collected and transported away, which is usually done on tank trucks. The wastewater logistics is quite demanding, since large amounts of

Dirty water in sometimes difficult to reach

Track sections must be collected and transported away. For cleaning a railway tunnel

average length requires several trips a tanker truck to carry away the dirty water. In addition, the cleaning vehicle must be supplied with fresh water. These processes extend the time required for tunnel cleaning

required time and make cleaning more expensive. Therefore, it has been proposed, for example, the washing liquid via injectors to mix a compressed air flow generated by their own blowing nozzles, and spray the aerosol thus formed under pressure against the tunnel inner wall, whereby the

Water consumption can be reduced. In this way, the problems described above can be reduced but not solved.

It is thus the object of the invention to purify

Tunnel inner walls faster and cheaper to perform. In addition, an economic use of the

Wax liquid are allowed.

These objects are solved by the features of claim 1. Claim 1 relates to a cleaning vehicle for tunnels with a drive, a washing liquid container, and connected to the washing liquid container via leads cleaning unit with cleaning brushes and

Cleaning nozzles for discharging the washing liquid against the tunnel inner wall, is proposed in the invention that a suction unit for the dirty washing liquid is provided with a sedimentation to the

Pre-cleaning of the polluted washing liquid is connected, and the sedimentation is connected via a supply line for the prepurified washing liquid with a prepurifying unit for the prepurified washing liquid, a flocculation stage and a flocculation stage downstream

Sedimentation stage includes, and a return line for the purified washing liquid is provided by the treatment unit in the washing liquid container.

The cleaning vehicle according to the invention thus not only sees the collection and preparation of the polluted

Washing liquid before, but also their reuse for tunnel cleaning by the purified washing liquid in the connected to the cleaning unit

Wash liquid container is recycled. The

Reuse of the dirty washing liquid for the tunnel cleaning is difficult to accomplish, since the dirty water of a tunnel cleaning problematic Impurities such as concrete sludge, bitumen, varnish or

Contain plastics that are difficult to recycle and seals and valves for the cleaning unit

used high-pressure pumps and nozzles can damage. The treatment of such dirty water is difficult even under simple conditions and appears in particular under the limited space of a

Tunnel cleaning vehicle and during constant movement of the tunnel cleaning vehicle hardly possible, also the

Preparation must be made in a quality sufficient for reuse with high pressure pumps and nozzles.

According to the invention, the reuse of the polluted washing liquid by means of a combination of

Sedimentation tank and a treatment unit with a flocculation and a flocculation stage

accomplished downstream sedimentation. in the

Sedimentation tanks settle solids that are heavier than water. The overflow water can be pumped off and represents pre-cleaned scrubbing liquid, which, however, can not yet be used for the high-pressure pumps and nozzles of the scrubbing unit, as Applicant has discovered.

According to the invention, therefore, a treatment unit with a flocculation stage and a sedimentation stage downstream of the flocculation stage is provided, with which colloidal solids can be removed. First the overflow water of the

Flocculation stage downstream sedimentation stage has the required purity to enter the

Wash fluid container of the cleaning unit to be pumped.

In order to be able to operate the flocculation stage optimally, it is also proposed that the sedimentation tank is connected to a storage tank via a first supply line for the prepurified washing liquid, and the storage tank is connected to the treatment unit via a second supply line

connected is. In this way, the treatment unit can be operated independently of the amount of wastewater immediately accumulating in the sedimentation tank, whereby in particular, the operation of the flocculation step and the dosage of the flocculant is facilitated.

Furthermore, it is proposed that the treatment unit be a downstream of the sedimentation filter stage

includes. For this purpose, one of the sedimentation stage

Subordinate pressure booster pump may be provided in order to operate the filter stage optimally. With the filter stage can remain in the overflow sedimentation

Solids are removed. The compilation of

Filter level can vary, preferably about

Sand filter and / or bag filter used. Sand and

Bag filters are simply constructed filters that are used to

Final filtration can be used at very low solids concentrations. But also ion exchangers,

Activated carbon filters or devices for UV sterilization can be provided.

With regard to the construction of the

Processing unit under the limited space conditions of a moving cleaning vehicle, it is proposed that the treatment unit has a cuboid casing, wherein the flocculation step extends along an inner longitudinal side of the casing within a first cuboid half, and the sedimentation step extends along an inner broad side of the casing. The

Processing unit can be placed with its cuboid wrapping about on a wagon of a rail vehicle. The flocculation step comprises in particular a

Flocculant container and a flocculant feed with

corresponding agitators. The arrangement of the flocculation step along an inner longitudinal side of the casing within a first cuboid half of the casing requires a

Execution of the flocculation tank, wherein the length of the flocculation tank is preferably greater than its height, and the height is preferably greater than its width. In such an embodiment, the by the movement of the

Cleaning vehicle caused surge in the

Flocculant container located liquid reduced. Of the Flocculant is at its inlet with the

Reservoir connected, and at its outlet with the

Sedimentation. The filter stage can be arranged along an inner longitudinal side of the casing within a second cuboid half, so that the cuboid

Interior of the processing unit is used optimally.

Since the dirty water is a shift in the pH

caused, which may affect the subsequent cleaning process and subsequent system parts such as pumps and nozzles, it is also proposed that the treatment unit comprises means for pH neutralization of the washing liquid.

With regard to the sedimentation stage, it is proposed that it be designed as a lamellar clarifier. In the bottom area, lamellar clarifiers have several slanted plates arranged in parallel in order to maximize the sedimentation area in relation to the available space, which is very difficult under the given limited space

proves advantageous.

In addition, it is proposed that the suction unit is designed as a suction hood arranged in the direction of travel after the cleaning unit. The suction unit connected to the sedimentation tank is thus located in the immediate spray-out area of the washing liquid and can thus detect a maximum amount of the sprayed washing liquid.

The invention will be further described with reference to a

Embodiment explained in more detail using the accompanying figures. It show here the

Fig. 1 is a schematic representation of an embodiment of a cleaning vehicle according to the invention seen from above, and the

Fig. 2 is a schematic representation of an embodiment of the treatment unit. Reference is first made to Fig. 1, which is a schematic representation of an embodiment of a

cleaning vehicle according to the invention with a drive 13, a washing liquid container 8, and one with the

Washing liquid container 8 via cleaning lines 5 connected cleaning unit 1 with rotating cleaning brushes 3 and arranged on spray bars cleaning nozzles 4 for dispensing the washing liquid shows. The supply lines 5 are designed as flexible hose lines, which extend on a support for fixing the cleaning unit 1 on the cleaning vehicle. The washing liquid is not visible on high-pressure pumps (in Figs. 1 and 2), which are connected to the

Supply lines 5 or the cleaning unit 1 may be sprayed under pressure against the tunnel inner wall. An in

As seen in the direction of travel after the cleaning unit 1 arranged suction hood 2 is part of a suction unit, which is held on a provided with hose 14 carrier, and is connected via the hose lines 14 with a sedimentation 6, in the extracted and contaminated

Washing liquid is collected. The sedimentation tank 6 is connected via a first supply line 9 for the pre-cleaned scrubbing liquid with a storage tank 7, and the storage tank 7 via a second supply line 15 with the processing unit 11. The processing unit 11 is in turn with a return line 10 for the cleaned scrubbing liquid with the scrubbing liquid container eighth

connected. The supply lines 9, 15 and the

Return line 10 are also flexible

Hose lines executed. In that shown in Fig. 1

Embodiment is further provided a residence container 12 for the operating crew of the cleaning vehicle. In the embodiment shown, the cleaning vehicle is further designed as a rail vehicle, in which all containers and the processing unit 11 are arranged on wagons, as shown schematically in FIG. 1.

As already mentioned, the extracted and

contaminated washing liquid from the suction hood 2 over the Hose lines 14 first passed into the sedimentation 6. In sedimentation 6 finds a

Prefiltration and coarse separation by settling solids that are heavier than water. The overflow water of the sedimentation tank 6 provides prepurified

Washing liquid, which via a first supply line 9 in a storage container 7 for the subsequent

Processing unit 11 is pumped.

The storage tank 7 is connected via a second supply line 15 with the processing unit 11, the one

Flocculation stage 16 and one of the flocculation stage 16

Subsequent sedimentation stage 17 includes, as will be explained below with reference to FIG. 2. FIG. 2 shows a schematic representation of an embodiment of a treatment unit 11. The flocculation stage 16 is formed by a flocculation tank 18 and a flocculation agent supply 19 with corresponding agitators 20, and serves for the purpose

Removal of colloidal solids from the prepurified

Washing liquid. The flocculation tank 18 is connected for this purpose at its inlet to the storage tank 7, and at its outlet with the sedimentation stage 17 and can be achieved in a einlaufseifiges reactor pool 18 a, in which a predominantly good mixing of the washing liquid to be cleaned with the flocculant, and an expiring soap Consolidation basin 18b, in which mainly the formation of settleable flakes is to be achieved. As a flocculant is preferably a

Broadband flocculant used as the exact

Composition of impurities in the used

Washing liquid is usually not known.

The subsequent sedimentation stage 17 is the

Sedimentation of the flakes formed in the flocculation step 16 and is preferably carried out as a lamellar clarifier. in the

Bottom area of the sedimentation stage 17 is a

Mud discharge pump 21 is arranged to remove the settled sludge. The purified washing liquid from the sedimentation stage 17 is subsequently a Submission tank 30 is supplied with a booster pump 31 for a subsequent filter stage 22. The filter stage 22 is used for the final filtration and comprises in the shown

Embodiment of FIG. 2, a sand filter 23, a bag filter 24, an ion exchanger 25 and a

Activated carbon filter 26. The selection and sequence of the filters of the filter stage 22 can vary, of course. In the embodiment of FIG. 2, a device for UV sterilization 27 are also shown, as well as a device for pH neutralization 29, since the flocculation stage 16 is a shift in the pH

which may affect the subsequent cleaning process and subsequent system parts such as pumps and nozzles. Finally, a monitoring and control unit 28 is provided to represent operating parameters of the containers, pumps and nozzles and to be able to change if necessary, and thus to monitor and control the entire cleaning process. The purified wax liquid is finally removed from the pH neutralization device 29 via the

Return line 10 pumped into the washing liquid container 8.

In Fig. 2 is a structural realization of the processing unit 11 is shown schematically in which the

Processing unit 11 a cuboid shell

wherein the flocculation stage 16 extends along an inner longitudinal side of the jacket within a first cuboid half, and the sedimentation stage 17 extends along an inner broad side of the jacket. The filter stage 22 is arranged along an inner longitudinal side of the casing within a second cuboid half, so that the cuboid interior of the processing unit 11 is optimally utilized and pre-cleaned washing liquid and purified washing liquid on the same side of the

Processing unit 11 supplied or removed.

Washing liquid before, but also their reuse for tunnel cleaning by removing the purified washing liquid the processing unit 11 again in the with the

Cleaning unit 1 connected washing liquid container 8 is recycled. To reuse the polluted

Washing liquid for tunnel cleaning, the dirty washing liquid using a combination of a

Sedimentation tank 6 and a treatment unit 11 with a flocculation stage 16 and a flocculation stage 16 downstream sedimentation stage 17 for removal

colloidal solids accomplished. The overflow water of the flocculation stage 16 downstream sedimentation stage 17 has the required purity to in the

Wash liquid container 8 of the cleaning unit 1 to be pumped and to be used with the high-pressure pumps and nozzles of the cleaning unit 1 can. After tunnel cleaning, only the settled solids of the sedimentation tank 6, as well as the discharged sludge sedimentation 7 must be pumped out and disposed of, and missing washing liquid are added, but far away from the cleaned tunnel and thus under simple

Operating conditions can be done. The transport of

polluted washing liquid via tank trucks and the ongoing provision of fresh washing liquid can

completely eliminated, which makes the cleaning of

Tunnel inner walls can be performed faster and cheaper. In addition, an economic use of

Wax liquid reached.

Reference sign list:

1 cleaning unit

2 exhaust hood

3 cleaning brushes

4 cleaning nozzles

5 supply lines

6 sedimentation tank

7 storage tank

8 washing liquid containers

9 first supply line

10 return line

11 Processing unit

12 residence containers

13 traction drive

14 hose line

15 second supply line

16 flocculation stage

17 sedimentation stage

18 flocculation tanks

19 Flocculant supply

20 agitators

21 mud discharge pump

22 filter level

23 sand filters

24 bag filters

25 ion exchangers

26 activated carbon filters

27 Device for UV sterilization

28 monitoring and control unit

29 Device for pH neutralization

30 presentation basins

31 booster pump

Claims

Claims:

1. cleaning vehicle for tunnels with a drive (13), a washing liquid container (8), and one with the

Washing liquid container (8) via cleaning lines (5) connected cleaning unit (1) with cleaning brushes (3) and

Cleaning nozzles (4) for discharging the washing liquid against the tunnel inner wall, characterized in that a

Suction unit is provided for the dirty washing liquid, which is connected to a sedimentation tank (6) for pre-cleaning the dirty washing liquid, and the sedimentation container (6) via a supply line (9, 15) for the pre-cleaned washing liquid with a

Processing unit (11) for the pre-cleaned

Washing liquid is connected, a flocculation stage (16) and one of the flocculation stage (16) downstream

Sedimentation stage (17), and a recirculation line (10) for the purified washing liquid from the

Processing unit (11) in the washing liquid container (8) is provided.

2. Cleaning vehicle according to claim 1, characterized in that the sedimentation container (6) via a first

Supply line (9) for the prepurified washing liquid with a storage container (7) is connected, and the

Reservoir (7) via a second supply line (15) with the processing unit (11) is connected.

3. cleaning vehicle according to claim 1 or 2, characterized

characterized in that the treatment unit (11) comprises a sedimentation stage (17) downstream filter stage (22).

4. cleaning vehicle according to claim 3, characterized in that one of the sedimentation stage (17) downstream

Booster pump (31) is provided.

5. Cleaning vehicle according to claim 3 or 4, characterized in that the filter stage (22) comprises a sand filter (23) and / or a bag filter (24).

6. Cleaning vehicle according to one of claims 1 to 5,

characterized in that the conditioning unit (11) has a cuboid shell, wherein the

Flocculation stage (16) along an inner longitudinal side of the sheath within a first cuboid half extends, and the sedimentation stage (17) along an inner

Broad side of the jacket extends.

7. cleaning vehicle according to claim 3 and 6, characterized

characterized in that the filter stage (22) extends along an inner longitudinal side of the sheath within a second cuboid half.

8. Cleaning vehicle according to one of claims 1 to 7,

characterized in that the treatment unit (11) has a device for pH neutralization (29).

9. Cleaning vehicle according to one of claims 1 to 8,

characterized in that the sedimentation stage (17) is designed as a lamellar clarifier.

10. cleaning vehicle according to one of claims 1 to 9, characterized in that the suction unit as seen in the direction of travel after the cleaning unit (1)

arranged suction hood (2) is executed.