Water protection facility

Abstract

The invention relates to a mobile water protection system for treating contaminated water, comprising a wastewater basin into which contaminated water can be introduced, a cleaning device designed to separate contaminated water in the wastewater basin into clear water and dirt, a neutralization device comprising a gassing device, a pressure vessel connection 8a for connecting a pressure vessel 9a containing pressurized gas, and a gas line 10a through which pressurized gas can be conveyed from the pressure vessel connection 8a to the gassing device, and configured to adjust the pH value of the clear water to a specific value by gassing the clear water using the gassing device.

Description

The invention relates to a mobile water protection system for the treatment of polluted water. Mobile water treatment plants for polluted water are set up at the site where the water needs to be treated. The aim is to process the polluted water generated at the site so that it can be discharged into local water bodies. Such plants are used, for example, at construction sites to treat water contaminated with concrete or concrete components so that it can be released into a nearby body of water. In the first step of the treatment process, typical mobile water protection systems separate the contaminated water into clean water and the dirt. The dirt is collected in the form of sludge and includes, for example, concrete, concrete components, suspended particles, etc. In a second step of the treatment process, the pH value of the clarified water is adjusted so that it can be discharged into bodies of water. The treated water is then released, for example, into a river, a lake, or the sewer system. Such mobile water protection systems are shown, for example, in utility model DE 20 2011 052 164 U1 and in patents CH 714 286 B1 , FR 3 031 973 B1 , FR 3 007 755 B1 , EP 2 221 434 B1. Mobile water protection systems can comprise several, even different, water treatment facilities. Typically, mobile water protection systems include a treatment unit that separates contaminated water, fed into a wastewater basin within the system, into clean water and sludge. This separation can be achieved through sedimentation or filtration. During sedimentation, solid particles settle at the bottom of the wastewater basin, for example, in the form of sludge, while the clean water forms as a supernatant in the upper part of the basin. The treated water can be fed into further water purification systems. For example, the mobile water protection system can include a neutralization unit to which the treated water is fed. The neutralization unit adds a pH-modifying substance to the treated water in an amount sufficient to achieve a specific pH value. Typically, the pH-modifying substance is a pressurized gas stored in a pressure vessel connected to the neutralization unit. The pressurized gas is then piped from the pressure vessel to the treated water via a gas line, thus adjusting the pH of the treated water to the specified value. Mobile water protection systems can also include a flocculation unit for further water treatment, into which the treated water is fed. The flocculation unit treats the treated water with a flocculant, which causes fine suspended particles in the treated water to aggregate into suspended particle aggregates. These suspended particle aggregates can then be separated from the treated water, for example, by sedimentation or filtration. For mobile water protection systems, the deployment location and purpose significantly determine the system's design. For example, the size and number of treatment facilities or wastewater basins depend on the size of the construction site and the expected volume of contaminated water to be treated. The number and / or size of additional water treatment equipment also depend on these factors. Before the treated water can be discharged into a body of water, it must meet specific water protection requirements, which can vary depending on the location and the specific body of water. Therefore, the body of water into which the treated water is discharged also determines the design of the mobile water protection system. What is missing is a mobile water protection system that can be easily set up and made operational at the deployment site according to specifications and can be operated efficiently. One of the aims of the invention is to provide such a mobile water protection system. The problem is solved by a mobile water protection system according to the features of claim 1. The dependent claims relate to preferred embodiments of the mobile water protection system. The invention relates to a mobile water protection system for treating contaminated water, comprising a wastewater basin into which contaminated water can be introduced, a cleaning device designed to separate contaminated water in the wastewater basin into clear water and dirt, a neutralization device comprising a gassing device, a pressure vessel connection for connecting a pressure vessel containing pressurized gas, and a gas line through which pressurized gas can be routed from the pressure vessel connection to the gassing device, and configured to adjust the pH value of the clear water to a specific value by gassing the clear water using the gassing device, and an outlet through which water treated by the neutralization device can be drawn off from the mobile water protection system. The neutralization device comprises a first gas pressure reducing device and a second gas pressure reducing device, which is spatially spaced apart from the first gas pressure reducing device. The neutralization device is configured to operate with a pressure vessel connected to the pressure vessel connection, containing pressurized gas, to adjust the pH value of the clear water to the specified value, by directing pressurized gas from the pressure vessel through the gas line to the first gas pressure reducing device, from the first gas pressure reducing device to the second gas pressure reducing device, and from the second gas pressure reducing device to the aeration device. In this process, the pressure of the pressurized gas is reduced by the first gas pressure reducing device to a pressure P1, and the pressure P1 of the pressurized gas is reduced by the second gas pressure reducing device to a pressure P2, for which P2 < P1, so that the pressurized gas in the gaseous state and at pressure P2 is directed from the second gas pressure reducing device to the gassing device. It was discovered that when pressurized gas is routed from a pressure vessel through a gas line to a fumigation device, heat energy is extracted from the surroundings when the pressure of the pressurized gas is reduced. Furthermore, it was recognized that extracting heat energy from the environment can cause the pressurized gas to undergo a change of state, potentially clogging the gas line and preventing the controlled flow of pressurized gas from the gas pressure vessel to the aeration device. Extracting heat energy from the environment can also lead to significant local cooling of the gas line, fittings, or valves, potentially resulting in damage due to thermal contraction. Furthermore, it was recognized that actively supplying heat energy, which is provided during the reduction of the pressure of the pressurized gas, reduces the efficiency of the mobile water protection system. In contrast, the mobile water protection system according to the invention, through its first and second gas pressure reducing devices, enables a reduction of the pressure of the pressurized gas in two stages, which are spatially separated from each other. This allows the extraction of heat energy from the environment to be controlled in such a way that the pressurized gas can also be directed from the gas pressure vessel to the aeration device in a controlled manner, and in particular, in such a way that no change of state of the pressurized gas occurs and the gas line, fittings, or valves are not damaged due to thermal contraction. A mobile water protection system is a water protection system that treats polluted water so that the treated water meets the requirements for discharge into bodies of water. A mobile water protection system can be transported to a deployment site, assembled and disassembled at the deployment site, and transported away from the deployment site again. Contaminated water is water that contains impurities, where the impurities or dirt are, for example, solid particles or suspended particles. Treatment of polluted water involves the process of transforming polluted water into clear water that meets water protection requirements, so that it can be discharged into a body of water. The mobile water protection system can include a supply line and the wastewater basin can include an inlet connected to the supply line, allowing polluted water to be introduced into the wastewater basin via the supply line and the inlet. The mobile water protection system may include a pump that pumps polluted water via the supply line and the inlet into the wastewater basin. The wastewater basin can be open at the top, allowing contaminated water to enter through the open side. A washing station for cleaning contaminated items can be installed above this open side. The washing station can be designed and positioned above the wastewater basin in such a way that any water generated during the cleaning process flows or drips into the basin below. The open side of the open-topped wastewater basin can be covered with a grate that is permeable to water and contaminated water, while simultaneously providing a walkable surface. Such a grate can be part of the washing station, allowing soiled items to be washed with water on the grate or walkable surface, and the resulting contaminated water to flow through the grate or walkable surface into the wastewater basin. The cleaning system is designed to purify the contaminated water that enters or is collected in the wastewater basin. During the cleaning process, the contaminants are separated from the water in the wastewater basin, so that clean water and contaminants, or clean water and contaminants, are kept separate from each other within the basin. The cleaning system can be designed to separate the dirt or contaminants from the water based on the principle of sedimentation. The dirt or contaminants in the collected and standing wastewater basin settle to the bottom of the basin, forming a layer of sediment. Clear water forms above this layer as a supernatant. The cleaning system is then designed to provide clear water for further water treatment by means of the neutralization unit. The cleaning system can also be designed to release or withhold clear water for further treatment. This release can be controlled, for example, by an optional controller and sensors and release devices connected to the controller, such as flaps or valves. One of the sensors could, for example, be a turbidity sensor.As an alternative to the sedimentation principle, the cleaning system can be designed to separate the dirt or contaminants from the water based on the principle of filtration. The cleaning system can then, for example, include a filter bag in which the dirt or contaminants are retained. By removing the filter bag from the wastewater basin, the dirt or contaminants can be removed. The cleaning system can be designed analogously to the cleaning system that separates water and dirt or contaminants based on the sedimentation principle. If the wastewater basin is open at the top and a washing station is installed above the open side of the basin, then a filter bag can be attached to the washing station so that the dirt or contaminants are removed.The filter bag retains the contaminants from the dirty water produced during washing. The cleaning system can also be designed to separate the dirt or pollution and the water based on a combination of the principles of sedimentation and filtration. The mobile water protection system can include a discharge line connected to the outlet, whereby water treated by means of the neutralization device can be directed into a body of water via the outlet and the discharge line. The mobile water protection system may include a pump which pumps water treated by means of the neutralization device into a body of water via the outlet and the discharge line. The neutralization unit is configured to adjust the pH value of the treated water to a specific value by aerating it using the aeration device. This specific value can be the level the treated water must have to be discharged into a body of water. For example, the value could be in the range of 6.5 to 9.5. The value could, for example, be 8. The neutralization system can include a neutralization basin into which clear water can be discharged. The neutralization basin can be located next to the wastewater basin. The neutralization basin can be connected to the wastewater basin via an overflow, so that overflowing clear water from the wastewater basin is directed into the neutralization basin. The mobile water protection system can include an overflow valve device that can be controlled via the optional control system, so that clear water from the wastewater basin can be introduced into the neutralization basin in a controlled manner through the overflow valve. If the cleaning system, as described above, is designed to release clear water, then the cleaning system can further be designed to control the overflow valve device when the clear water is released, so that the released clear water overflows from the wastewater basin into the neutralization basin or is directed into the neutralization basin, e.g. by pumping. The mobile water protection system can include a supply line for transferring clear water from the wastewater basin to the neutralization basin. The mobile water protection system can also include a pump that pumps the clear water from the wastewater basin to the neutralization basin. The neutralization unit is designed to neutralize clear water, i.e., to adjust its pH value to a predetermined level. During neutralization, the clear water is treated with a pH-altering gas via the aeration device. This gas can be, for example, CO2, i.e., gaseous carbon dioxide. The aeration device can include a gas-carrying line, this gas-carrying line having a plurality of openings through which the pressurized gas carried in the gas-carrying line passes and thus enters the clear water. The clear water is therefore permeated by the gas. In other words, this results in the aeration of the clear water. The openings can also be nozzles. If the neutralization system includes a neutralization basin, the fumigation device can be located at the bottom of the neutralization basin. The pressure vessel connection can have a connection element designed for connection to a connection element of a connecting hose. The connecting hose can have another connection element designed for connection to a connection element on a pressure vessel. Two connection elements to be connected can form a screw coupling. The pressure vessel connection can have two, three or more such connection elements, with a pressure vessel being connectable to each connection element. The pressure vessel can be a gas cylinder. The pressure vessel can be filled with pressurized gas. The pressurized gas in the pressure vessel can have a pressure Pb of, for example, 10 ≤ Pb ≤ 200 bar. The pressurized gas can be CO2, i.e., carbon dioxide. The gas pipeline can comprise sections. For example, a first section can be designed to convey pressurized gas from a pressure vessel connected to the pressure vessel connection to the first pressure reducing device. A second section can be designed to convey pressurized gas from the first pressure reducing device to the second pressure reducing device. A third section can be designed to convey pressurized gas from the second pressure reducing device to the aeration device. The gas pipeline sections can be designed differently. For example, the first section of the gas line can be a metal pipe. The second section of the gas line can be a hose. The second section of the gas line can be made of a heat-insulating material. The second section of the gas line can, for example, be a plastic hose. The third section of the gas pipeline can be formed by a metallic pipe, for example a copper pipe. The neutralization unit can include a pH sensor connected to the optional controller. The neutralization unit is then designed to measure the pH value of the treated water based on sensor data and, based on this measurement, to release or withhold the treated water for further treatment or discharge. The pH sensor can be part of a pH measuring probe. If the neutralization system includes a neutralization basin, the neutralization basin can be open at the top. The open side of the open neutralization basin can be covered or fitted with a grid to which a pH probe can be attached at various positions so that the pH probe is immersed in the clear water. The fumigation device can be a CO2 fumigation device configured to fumigate clear water with gaseous CO2. The mobile water protection system can include a flow sensor, in which case the system is configured to measure the flow rate of wastewater or clear water and, based on this measurement, control the treatment of contaminated water. For example, the flow sensor can be positioned so that the flow rate of the contaminated water entering the wastewater basin can be measured. Alternatively, the flow sensor can be positioned at the outlet so that the flow rate at the outlet can be measured. The mobile water protection system can include a level sensor, in which case the system is configured to measure the level of the wastewater or clear water and, based on this measurement, control the treatment of the contaminated water. If the neutralization unit includes a neutralization basin, the level sensor can be positioned at the neutralization basin so that the level of the clear water in the basin can be measured. The first gas pressure reducing device and the second gas pressure reducing device can be located outside the wastewater basin and outside any possible neutralization basin. The second gas pressure reducing device can be located at least one meter away from the clear water along the gas line. The second gas pressure reducing device can be located at a distance D from the clear water along the gas line. D can be such that if the operating temperature of the second gas pressure reducing device is lower than that of the clear water, heat stored in the clear water is not conducted through the gas line to the second gas pressure reducing device. Therefore, D can be such that the second gas pressure reducing device, and consequently also the first gas pressure reducing device, is thermally decoupled from the clear water. The neutralization device is designed so that, when operating with a pressure vessel containing pressurized gas connected to the pressure vessel connection, the pressurized gas flows through the first gas pressure reducing device towards the second gas pressure reducing device. As the gas flows through the first gas pressure reducing device, the pressure of the pressurized gas is reduced to pressure P1. The neutralization device can be designed such that, when operating with a pressure vessel containing pressurized gas connected to the pressure vessel connection, the pressurized gas is routed from the pressure vessel connection to the first gas pressure reducing device at undiminished pressure. In this case, the pressurized gas in the gas line between the pressure vessel connection and the first gas pressure reducing device has essentially the same pressure as in the pressure vessel. In the gas line between the first gas pressure reducing device and the second gas pressure reducing device, the pressurized gas then has a pressure P1, which is reduced compared to the pressure of the pressurized gas in the gas line between the pressure vessel connection and the first gas pressure reducing device. The neutralization device is designed so that, when operating with a pressure vessel containing pressurized gas connected to the pressure vessel connection, the second gas pressure reducing device is subjected to a flow of pressurized gas at pressure P1 towards the aeration device. As the gas flows through the second gas pressure reducing device, the pressure of the pressurized gas is reduced from pressure P1 to pressure P2. In this case, P2 < P1. According to one embodiment, the first gas pressure reducing device is a cylinder pressure reducer. The pressure P1 on the cylinder pressure regulator is adjustable. The cylinder pressure regulator is designed so that, when operating with a pressure vessel containing pressurized gas connected to the pressure vessel connection, the pressurized gas in the gas line between the cylinder pressure regulator and the second gas pressure reducing device has a pressure P1. This is independent of the pressure of the pressurized gas in the gas line between the pressure vessel connection and the cylinder pressure regulator. According to one embodiment, the second gas pressure reducing device is a throttle valve or an orifice. The throttle valve allows the cross-section through which the pressurized gas flows to be adjusted, thereby allowing the pressure P2 to be set. An orifice limits the cross-section through which the pressurized gas flows to a specific size. The pressure P2 is determined by the size of this cross-section. Because the pressurized gas in the gas line between the first gas pressure reducing device and the second gas pressure reducing device has a constant pressure P1, the pressure P2 of the pressurized gas in the gas line between the second gas pressure reducing device and the gassing device can be adjusted with a throttle valve or an orifice. According to one embodiment, a gas line section of the gas line, which extends between the first gas pressure reducing device and the second gas pressure reducing device, is formed from a heat-insulating material; in particular, the gas line section is formed by a plastic hose. A thermally insulating material has a thermal conductivity λ ≤ 1 W / (m K). This insulating material inhibits heat conduction between the first and second gas pressure reducing devices and contributes to thermal decoupling between them. The plastic of the plastic hose can be ethylene propylene diene monomer rubber (EPDM) with a thermal conductivity coefficient λ of 0.1 - 0.3 W / (m K). According to one embodiment, a gas line section of the gas line, which extends between the first gas pressure reducing device and the second gas pressure reducing device, has a minimum length L of 45 cm, in particular is made of a heat-insulating material and is preferably formed by a plastic hose. The minimum length L can be such that if the operating temperature of the first gas pressure reducing device and the temperature of the second gas pressure reducing device differs, heat conduction between the first and second gas pressure reducing devices does not lead to an equalization of temperatures. That is, L can be such that the first and second gas pressure reducing devices are thermally decoupled from each other. According to one embodiment, the gas under pressure is carbon dioxide. Carbon dioxide, or CO2, is a pH-altering gas. When clear water is aerated with CO2, the CO2 dissolves in the water, thereby lowering the pH value. According to one embodiment, for P1, P1 ≤ 12 bar, in particular 8 bar ≤ P1 ≤ 12 bar. This ensures that the extraction of heat energy from the environment is controlled in such a way that the pressurized gas can also be directed in a controlled manner from the gas pressure vessel to the second gas pressure reducing device, in particular in such a way that no change of state of the pressurized gas occurs and the first gas pressure reducing device is not damaged due to thermal contraction. According to one embodiment, for P2, P2 ≤ 4 bar, in particular 1 bar ≤ P2 ≤ 3 bar. This ensures that the extraction of heat energy from the environment is controlled in such a way that the pressurized gas can also be directed in a controlled manner from the first gas pressure reducing device to the gassing device, in particular in such a way that no change of state of the pressurized gas occurs and the second gas pressure reducing device is not damaged due to thermal contraction. According to one embodiment, the neutralization device has a retaining plate, and the pressure vessel connection, the first gas pressure reducing device and the second gas pressure reducing device are each attached to the retaining plate. By attaching the pressure vessel connection, the first gas pressure reducing device and the second gas pressure reducing device to a mountable mounting plate, the pressure vessel connection, the first gas pressure reducing device and the second gas pressure reducing device are held at a specific distance from each other and can be easily mounted by mounting the mounting plate. The mounting plate can, for example, have a length of less than 70 cm and a width of less than 50 cm. The pressure vessel connection, the first gas pressure reducing device and the second gas pressure reducing device can be attached to the mounting plate in such a way that the pressurized gas, when operating with a pressure vessel containing pressurized gas connected to the pressure vessel connection, flows in a first direction through the first gas pressure reducing device and in a second direction through the second gas pressure reducing device, the first direction being perpendicular to the second direction. This allows for a well-controlled flow of the pressurized gas from the pressure vessel connection to the gassing device and a space-saving arrangement of the pressure vessel connection, the first gas pressure reducing device and the second gas pressure reducing device on the mounting plate. According to one embodiment, the neutralization device comprises a further pressure vessel connection for connecting a further pressure vessel containing pressurized gas, a further gas line through which pressurized gas can be conveyed from the further pressure vessel connection to the second gas pressure reducing device, and a third gas pressure reducing device spaced apart from the first gas pressure reducing device and the second gas pressure reducing device. The neutralization device is configured to, when operating with a further pressure vessel connected to the further pressure vessel connection, to direct pressurized gas from the further pressure vessel through the further gas line to the third gas pressure reducing device, and from the third gas pressure reducing device to the second gas pressure reducing device, in order to adjust the pH value of the clear water to the specified value. In this process, the pressure of the pressurized gas is reduced to pressure P1 by the third gas pressure reducing device, and the pressure P1 of the pressurized gas is reduced to pressure P2 by the second gas pressure reducing device, so that the pressurized gas in a gaseous state and at pressure P2 is directed from the second gas pressure reducing device through a section of the gas line to the gassing device. The above-mentioned information regarding the pressure vessel connection, the pressure vessel, the gas line and the first gas pressure reducing device also applies analogously to the further pressure vessel connection, the further pressure vessel, the further gas line and the third gas pressure reducing device. This allows multiple pressure vessels containing pressurized gas to be connected simultaneously. This improves the usability of the mobile water protection system because its operation does not need to be interrupted to disconnect empty pressure vessels and connect pressure vessels containing pressurized gas. According to one embodiment, the further pressure vessel connection and the third gas pressure reducing device are each attached to the mounting plate, wherein the further pressure vessel connection and the third gas pressure reducing device are held at a greater distance transverse to the plane of the mounting plate compared to the pressure vessel connection and the first gas pressure reducing device. Due to the spacing of the pressure vessel connections and the gas pressure reducing devices, the extraction of heat energy from the surroundings of the gas pressure reducing devices can be controlled in such a way that the pressurized gas can also be directed in a controlled manner from the corresponding gas pressure vessel to the gassing device, in particular in such a way that no change of state of the pressurized gas occurs and the gas pressure reducing devices are not damaged due to thermal contraction. According to one embodiment, the mobile water protection system includes a control unit for controlling the treatment of contaminated water, the first gas pressure reducing device and the second gas pressure reducing device are each communicatively connected to the control unit, and the control unit is configured to direct the pressurized gas to the fumigation device based on pressure information transmitted by the first gas pressure reducing device and the second gas pressure reducing device. The gas pressure reducing devices can be designed and configured in such a way that they transmit this pressure information about the pressure of the pressurized gas at the gas pressure reducing devices to the control system. The neutralization device may have one or more flow control valves connected to the control unit between the first and second gas pressure reducing devices, and optionally between the third and second gas pressure reducing devices. These flow control valves can be actuated by the control unit based on pressure information transmitted by the gas pressure reducing devices. Actuation of the valves can then, for example, close off the line carrying the pressurized gas to the gassing device. The flow control valve can, for example, be a solenoid valve. According to one embodiment, the gas line between the first gas pressure reducing device and the second gas pressure reducing device includes a flow control valve communicatively connected to the control unit, and the control unit is configured to control the flow of the pressurized gas based on pressure information transmitted by the first gas pressure reducing device and the second gas pressure reducing device and by actuating the flow control valve. The mobile water protection system according to the invention is described in more detail below by way of example, based on specific embodiments shown in the figures. Figure 1 shows a schematic representation of a mobile water protection system; and Figure 2 shows a view of part of the neutralization unit. Fig. 1 shows a schematic representation of a mobile water protection system 1. The mobile water protection system 1 comprises a wastewater basin 2 with an inlet 18, a cleaning device 3 with a turbidity sensor 19, a neutralization device 6 with a gassing device 7 and with a pH sensor 20 and with a neutralization basin 21, a control cabin 22 with a control unit 11 and with two pressure vessels 9a, 9b connected to the gassing device 7 containing pressurized gas, and an outlet 5. Contaminated water can be fed into the wastewater basin 2 via inlet 18. The cleaning unit 3 is designed to separate the contaminated water in the wastewater basin 2 into clear water 4 and dirt based on the principle of sedimentation. Contaminated water collected in the wastewater basin 2 separates into a layer of dirt 23 and a supernatant 24 of clear water. The turbidity sensor 19 and the control unit 11 are configured to measure the turbidity of the clear water in the supernatant 24. If the measured value falls within a certain range, the discharge of contaminated water into the wastewater basin 2 is stopped, thus preventing the clear water from overflowing into the neutralization unit 6. The clear water 4, collected in the neutralization basin 21, is treated with gas 25 by means of the aeration device 7. The control unit 11 and the pH sensor 20 are configured to measure the pH value of the clear water 4 in the neutralization basin 21 and, if the measured value is within a certain range, the clear water 4 is released to be drawn off via the outlet 5. The mobile water protection plant 1 shown in Fig. 1 for the treatment of polluted water further comprises a mounting plate 15 to which a pressure vessel connection 8a, another pressure vessel connection 8b, a first gas pressure reducing device 12, a second gas pressure reducing device 13, a third gas pressure reducing device 16, gas line sections of the gas line 10a, another gas line 10b and flow control valves 17 are attached. This retaining plate 15 with the components attached to it is shown schematically in Fig. 1 and in an enlarged view in Fig. 2. Each of the pressure vessel connections 8a, 8b can be connected to a pressure vessel 9a, 9b containing pressurized gas. The neutralization device 3 comprises a gas line 10a, through which pressurized gas can be conveyed from the pressure vessel connection 8a to the fumigation device 7. The neutralization unit 3 is configured to adjust the pH value of the clear water 4 to a specific value by aerating the clear water 4 using the aeration device 7. Water treated by means of the neutralization unit 6 can be drawn off from the mobile water protection system 1 via outlet 5 of the mobile water protection system 1. The neutralization device 6 comprises a first gas pressure reducing device 12 and a second gas pressure reducing device 13 spatially separated from the first gas pressure reducing device 12. The neutralization device 6 is configured in operation, with pressure vessel 9a connected to pressure vessel connection 8a and containing pressurized gas, to adjust the pH value of the clear water 4 to the specified value, to direct pressurized gas from pressure vessel 9a through gas line 10a to the first gas pressure reducing device 12, from the first gas pressure reducing device 12 to the second gas pressure reducing device 13, and from the second gas pressure reducing device 13 to the aeration device 7. In this process, the pressure of the pressurized gas is reduced by the first gas pressure reducing device 12 to a pressure P1, and the pressure P1 of the pressurized gas is reduced by the second gas pressure reducing device 13 to a pressure P2, for which P2 < P1, so that the pressurized gas in the gaseous state and at pressure P2 is directed from the second gas pressure reducing device 13 to the gassing device 7. The neutralization device 6 is also configured to, in operation with pressure vessel 9b connected to pressure vessel connection 8b, to direct pressurized gas from pressure vessel 9b through the further gas line 10b to the third gas pressure reducing device 16 and from the third gas pressure reducing device 16 to the second gas pressure reducing device 13 in order to adjust the pH value of the clear water 4 to the specified value. In this process, the pressure of the pressurized gas is reduced by the third gas pressure reducing device 16 to a pressure P1, and the pressure P1 of the pressurized gas is reduced by the second gas pressure reducing device 13 to the pressure P2, for which P2 < P1, so that the pressurized gas in the gaseous state and with the pressure P2 is directed from the second gas pressure reducing device 13 through a section of the gas line 10a to the gassing device 7. The gas pressure reducing devices 12, 13 and 16 shown in Fig. 2 are communicatively connected to the control unit 11 and are designed to transmit pressure information about the pressure of the pressurized gas at the gas pressure reducing devices 12, 13 and 16 to the control unit 11. The first gas pressure reducing device 12 and the third gas pressure reducing device 16 shown in Fig. 2 are cylinder pressure reducers. The second gas pressure reducing device 13 shown in Fig. 2 is a throttle valve with an adjusting wheel. The gas pipe section 14 of gas pipe 10a shown in Fig. 2 is formed by a plastic hose. Gas pipe section 14 has a minimum length of 45 cm. The corresponding gas pipe section of the further gas pipe 10b is also formed by a plastic hose. The gas line 10a shown in Fig. 2 and the further gas line 10b each comprise a flow control valve 17 communicatively connected to the control unit 11. The respective flow control valve 17 can be actuated by the control unit 11 and is a solenoid valve. QUOTES INCLUDED IN THE DESCRIPTION This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature DE 20 2011 052 164 U1

[0005] CH 714 286 B1

[0005] FR 3 031 973 B1

[0005] FR 3 007 755 B1

[0005] EP 2 221 434 B1

[0005]

Claims

Mobile water protection plant (1) for the treatment of polluted water, comprising: a wastewater basin (2) into which polluted water can be discharged; a cleaning device (3) designed to separate polluted water in the wastewater basin (2) into clear water (4) and dirt; a neutralization device (6) comprising an aeration device (7), a pressure vessel connection (8a) for connecting a pressure vessel (9a) containing pressurized gas, and a gas line (10a) through which pressurized gas can be conveyed from the pressure vessel connection (8a) to the aeration device (7), and configured to adjust the pH value of the clear water (4) to a specific value by aerating the clear water (4) using the aeration device (7); and an outlet (5).via which water treated by the mobile water protection plant (1) by means of the neutralization device (6) can be drawn off from the mobile water protection plant (1), characterized in that the neutralization device (6) comprises a first gas pressure reducing device (12) and a second gas pressure reducing device (13) spaced apart from the first gas pressure reducing device (12), and is configured, when operating with a pressure vessel (9a) connected to the pressure vessel connection (8a) containing pressurized gas, to adjust the pH value of the clear water (4) to the specified value, to direct pressurized gas from the pressure vessel (9a) through the gas line (10a) to the first gas pressure reducing device (12), from the first gas pressure reducing device (12) to the second gas pressure reducing device (13), and from the second gas pressure reducing device (13) to the aeration device (7),wherein the pressure of the pressurized gas is reduced by the first gas pressure reducing device (12) to a pressure P1, and wherein the pressure P1 of the pressurized gas is reduced by the second gas pressure reducing device (13) to a pressure P2, for which P2 < P1, so that the pressurized gas in the gaseous state and at pressure P2 is directed from the second gas pressure reducing device (13) to the gassing device (7). Mobile water protection system (1) according to claim 1, characterized in that the first gas pressure reducing device (12) is a cylinder pressure reducer. Mobile water protection system (1) according to one of claims 1 to 2, characterized in that the second gas pressure reducing device (13) is a throttle valve or an orifice. Mobile water protection system (1) according to one of claims 1 to 3, characterized in that a gas line section (14) of the gas line (10a), which extends between the first gas pressure reducing device (12) and the second gas pressure reducing device (13), is formed from a heat-insulating material, in particular and the gas line section (14) is formed by a plastic hose. Mobile water protection system (1) according to one of claims 1 to 3, characterized in that a gas line section (14) of the gas line (10a), which extends between the first gas pressure reducing device (12) and the second gas pressure reducing device (13), has a minimum length L of 45 cm, in particular and is made of a heat-insulating material and is preferably formed by a plastic hose. Mobile water protection system (1) according to one of claims 1 to 5, characterized in that the gas under pressure is carbon dioxide. Mobile water protection system (1) according to one of claims 1 to 6 , characterized in that for P1 P1 ≤ 12 bar, in particular 8 bar ≤ P1 ≤ 12 bar. Mobile water protection system (1) according to one of claims 1 to 7 , characterized in that for P2 P2 ≤ 4 bar, in particular 1 bar ≤ P2 ≤ 3 bar. Mobile water protection system (1) according to one of claims 1 to 8, characterized in that the neutralization device (6) has a retaining plate (15), and the pressure vessel connection (8a), the first gas pressure reducing device (12) and the second gas pressure reducing device (13) are each attached to the retaining plate (15). Mobile water protection system (1) according to one of claims 1 to 9, characterized in that the neutralization device (6) comprises: a further pressure vessel connection (8b) for connecting a further pressure vessel (9b) containing pressurized gas; a further gas line (10b) through which pressurized gas can be conveyed from the further pressure vessel connection (8b) to the second gas pressure reducing device (13); and a third gas pressure reducing device (16) spaced apart from the first gas pressure reducing device (12) and the second gas pressure reducing device (13), wherein the neutralization device (6) is configured, in operation with a further pressure vessel (9b) containing pressurized gas connected to the further pressure vessel connection (8b), to adjust the pH value of the clear water (4) to the specified value, pressurized gas from the further pressure vessel (9b) through the further gas line (10b) to the third gas pressure reducing device (16).ando from the third gas pressure reducing device (16) to the second gas pressure reducing device (13), whereino the pressure of the pressurized gas is reduced from the third gas pressure reducing device (16) to pressure P1, ando the pressure P1 of the pressurized gas is reduced from the second gas pressure reducing device (13) to pressure P2, so that the pressurized gas in the gaseous state and at pressure P2 is directed from the second gas pressure reducing device (13) through a section of the gas line (10a) to the gassing device (7). Mobile water protection system (1) according to claim 10, characterized in that the further pressure vessel connection (8b) and the third gas pressure reducing device (16) are each attached to the mounting plate (15), wherein the further pressure vessel connection (8b) and the third gas pressure reducing device (16) are held at a greater distance transverse to the plane of the mounting plate (15) compared to the pressure vessel connection (8a) and the first gas pressure reducing device (12). Mobile water protection system (1) according to one of claims 1 to 11, characterized in that the mobile water protection system (1) comprises a control unit (11) for controlling the treatment of contaminated water, the first gas pressure reducing device (12) and the second gas pressure reducing device (13) are each communicatively connected to the control unit (11), and the control unit (11) is configured to direct the pressurized gas to the fumigation device (7) based on pressure information transmitted by the first gas pressure reducing device (12) and the second gas pressure reducing device (13). Mobile water protection system (1) according to claim 12, characterized in that the gas line (10a) between the first gas pressure reducing device (12) and the second gas pressure reducing device (13) comprises a flow control valve (17) communicatively connected to the control unit (11), and the control unit (11) is configured to control the flow of the pressurized gas based on pressure information transmitted by the first gas pressure reducing device (12) and the second gas pressure reducing device (13) and by actuating the flow control valve (17).

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