Method for discharging a gas from a gas-conducting line section

Abstract

The invention relates to a method for discharging a gas from a gas-conducting line section (4), comprising the steps of transferring (100) a first quantity of the gas from the gas-conducting line section (4) into a gas reservoir (8), supplying (200) a purge gas into the gas-conducting line section (4) upon detection of a residual quantity of the gas within the gas-conducting line section (4), and transferring (300) the residual quantity of the gas from the gas-conducting line section (4) into the gas reservoir (8), wherein the residual quantity of the gas from the gas-conducting line section (4) is separated from the supplied purge gas by means of a separation unit (10) during the transfer (300) into the gas reservoir (8).

Description

[0001] The present invention relates to a method and a system for discharging a gas from a gas-carrying line section.

[0002] Gas-carrying pipelines or sections of pipelines must be maintained from time to time or repaired in the event of damage. Before such maintenance or repair work, the pipelines or sections of pipelines must sometimes be drained in a controlled manner. For this purpose, the gas carried in the pipelines is usually pumped into other sections of the pipeline. During such a pumping process, a state is eventually reached at which the pipelines or sections of pipeline are only filled with low pressure. However, low pressure within the pipelines eventually leads to the formation of a boundary layer in the peripheral areas of the gas-carrying pipelines. Depending on the gas being transported, the formation of a boundary layer represents a particularly increased safety risk due to the potential penetration of atmospheric oxygen into the pipelines. Furthermore, simply venting the residual gas in the pipelines into the atmosphere is only possible with gases that pose no health or environmental risks.

[0003] It is therefore the object of the present invention to at least partially remedy the aforementioned disadvantages of known systems and methods for discharging a gas from a gas-carrying line section. In particular, the object of the present invention is to provide a method and a system that each enable a rapid, safe, cost-effective, and environmentally friendly discharge of a gas from a gas-carrying line section.

[0004] The above object is achieved by a method having the features of claim 1 and a system according to claim 7. Further features and details of the invention emerge from the subclaims, the description, and the drawings. Technical features disclosed for the method according to the invention also apply in connection with the system according to the invention and vice versa, so that with regard to the disclosure of the individual aspects of the invention, reference is always made to each other.

[0005] According to the invention, a method for discharging a gas from a gas-conducting line section is provided. The method according to the invention comprises the steps of transferring a first quantity of the gas from the gas-conducting line section into a gas reservoir, supplying a purge gas into the gas-conducting line section upon detection of a residual quantity of the gas within the gas-conducting line section, and transferring the residual quantity of the gas from the gas-conducting line section into the gas reservoir. The residual quantity of the gas from the gas-conducting line section is transferred to the gas reservoir via a separation unit for separation from the supplied purge gas.

[0006] Within the scope of the invention, the removal of a gas from a gas-carrying line section can be understood in particular as the targeted transfer of a gas from a line section into a gas reservoir. A first quantity of a gas can preferably be understood as the main part of the gas that is located in a gas-carrying line section and amounts, for example, to at least 90%, in particular at least 95% of the total weight or total volume or total pressure of the gas that is located in the gas-carrying line section. The remaining portion of the total weight or total volume or total pressure can then preferably form the remaining quantity of gas. It is also understood that gas can be understood in particular as a medium that is gaseous under standard conditions, such as room temperature (25°C) and a pressure of one bar. A gas reservoir can be in the form of a container, e.g.a pressure vessel or in the form of an additional line section that can be separated from the line section to be emptied. It is also understood that transferring a gas "over" a separation unit can be understood as transferring it "through" or along a separation unit.

[0007] Within the scope of the invention, it has been recognized that, based on the steps provided according to the invention of transferring a first quantity of a gas without purge gas and subsequently transferring a residual quantity of the gas with a purge gas via a separation unit, a fast, safe, cost-effective, and environmentally friendly removal of a gas from a gas-carrying line section can be ensured. The invention not only takes into account the formation of boundary layers during the transfer of a gas, but also the release of a potentially harmful and / or environmentally harmful gas into the atmosphere. Furthermore, consideration is given to reusing a gas to be removed and thus transferring it with the greatest possible purity.

[0008] With a view to quickly and effectively transferring a gas from a gas-carrying line section into a gas reservoir, it can advantageously be provided that the first quantity and / or the remaining quantity of the gas is transferred from the gas-carrying line section into the gas reservoir via a compressor unit, wherein the compressor unit is preferably designed in the form of a pump, in particular in the form of a Roots pump, piston pump, or diaphragm pump. For example, using Roots pumps allows for the rapid and effective transfer of larger gas volumes.

[0009] Within the scope of a structurally simple embodiment for the selective transfer of a gas via a separation unit, it can advantageously be provided that the residual amount of gas from the gas-carrying line section is separated from the supplied purge gas within a bypass line via a separation unit. The separation unit can preferably be arranged within the bypass line, so that the residual amount of gas can be controlled in a structurally simple and rapid manner by closing and opening corresponding valves. The bypass line can be arranged on the suction side or pressure side of the compressor unit.

[0010] With regard to a structurally simple and reliable detection of a residual amount of gas from the gas-carrying line section, it can advantageously be provided according to the invention that a residual amount of gas within the gas-carrying line section, from which a purge gas is supplied, is detected via a pressure measurement, wherein the purge gas is preferably supplied from the time a critical pressure is detected, wherein the critical pressure is in particular less than 5 bar. The critical pressure can in particular be understood as the total pressure within the gas-carrying line section. The purge gas can preferably be supplied via high-pressure containers and / or introduced into the gas-carrying line section in a valve-controlled manner via a compressor unit. Alternatively, in particular if the critical pressure is < 1 bar, a valve can be opened to the atmosphere so that air from the atmosphere can be used as the purge gas.

[0011] As part of a simple and cost-effective solution for removing or discharging the purge gas used, it is also conceivable for the purge gas to be released into the atmosphere after separation from the residual gas, with air preferably being used as the purge gas. Particularly when conveying gases that are hazardous to health, harmful to the environment, or toxic, the purge gas can also be in the form of argon or similar inert gases. As chemically inert gases, argon and nitrogen are particularly suitable as displacement agents for transferring a residual amount of a gas. When using argon and nitrogen as the purge gas, however, the purge gas can preferably not be released into the atmosphere, but rather collected and stored.

[0012] With regard to a particularly climate-friendly application of the method according to the invention, it can advantageously be provided that the gas to be discharged from the gas-carrying line section is a greenhouse gas or comprises a greenhouse gas, wherein the gas to be discharged from the gas-carrying line section is preferably natural gas or comprises natural gas. Thus, depending on its methane content, natural gas has a high greenhouse potential, which can be minimized or preferably eliminated through the application of the method in question. Alternatively, the gas to be discharged from the gas-carrying line section can also be another hydrocarbon-based fuel gas or be in the form of hydrogen, or can be hydrogen.

[0013] Likewise, with a view to ensuring a safe and health-safe discharge of a gas, it can be provided that the gas to be discharged from the gas-carrying line section is or comprises a gas that is harmful to health, harmful to the environment and / or toxic, wherein the gas to be discharged from the gas-carrying line section is or comprises preferably CO, H 2 S, chlorine gas, CO 2 or NH 3.

[0014] Within the scope of a reliable and complete separation of a purge gas from a residual amount of a gas, it can advantageously be provided according to the invention that the residual amount of the gas from the gas-carrying line section is separated from the purge gas by at least one of the following methods: chemical absorption process, adsorption process, distillation process, membrane separation process, cryogenic separation process.

[0015] It is understood that more than one separation process can also be used, for example, sequentially, particularly stepwise. The selection of the appropriate method(s) can preferably be based on the gas and / or the purge gas.

[0016] To simplify the execution of the present method and to improve accuracy, it is further conceivable for the method to include the use of artificial intelligence, wherein at least a residual amount of gas within the gas-carrying line section is preferably detected using artificial intelligence. In particular, the detection of a residual amount of gas within the gas-carrying line section can be based on the use of AI.

[0017] With regard to the method according to the invention, it is understood that individual, several, or all mandatory and / or optional steps of the method according to the invention can be carried out in the proposed order, but also deviating from the proposed order. Individual, several, or all mandatory and / or optional steps of the method according to the invention can be carried out repeatedly, for example, cyclically. It is further understood that individual, several, or all of the mandatory and optional steps of the method according to the invention can also be carried out at least partially automatically or in an automated manner, in particular by a computer.

[0018] The invention further relates to a system for discharging a gas from a gas-conducting line section, in particular for carrying out a method described above. The system according to the invention comprises a first connection element for connection to a gas-conducting line section, a second connection element for connection to a gas reservoir, a line system arranged between the first and second connection elements for transferring the gas from the gas-conducting line section into the reservoir, a measuring unit for detecting a residual amount of gas within the gas-conducting line section, a supply device for supplying a purge gas into the gas-conducting line section upon detection of a residual amount of gas, and a separation unit for separating the residual amount of gas from the supplied purge gas when the residual amount of gas is transferred from the gas-conducting line section into the gas reservoir.Thus, the system according to the invention has the same advantages as have already been described in detail with regard to the method according to the invention.

[0019] For the purpose of reliably and completely separating a purge gas from a residual amount of a gas, the invention advantageously provides for the separation unit to comprise a chemical absorption unit and / or an adsorption unit and / or a distillation unit and / or a membrane and / or a cryogenic separation unit. It is understood that more than one separation unit may also be provided, for example, arranged one after the other, in particular in stages.

[0020] With a view to quickly and effectively transferring a gas from a gas-carrying line section into a gas reservoir, it can advantageously be provided that a compressor unit is provided for transferring a first quantity and / or a residual quantity of a gas from the gas-carrying line section into the gas reservoir. The compressor unit is preferably designed in the form of a pump, in particular in the form of a Roots pump, piston pump, or diaphragm pump. The use of Roots pumps or Roots piston pumps allows, in particular, larger gas volumes to be conveyed quickly and effectively.

[0021] Within the scope of a structurally simple embodiment for the selective transfer of a gas via a separation unit, it can advantageously be provided that the separation unit is arranged within a bypass section, wherein the bypass section preferably has a first and second bypass valve, wherein the bypass section is preferably arranged on the suction side of the compressor unit. The separation unit or the bypass line can preferably have additional valves through which a residual amount of gas can be guided in a structurally simple and rapid manner. Alternatively, the bypass line can also be arranged on the pressure side of a compressor unit.

[0022] Within the scope of a structurally simple embodiment for the selective transfer of a gas via a separation unit, it can also advantageously be provided that the first and second connection elements have valves for introducing and discharging a gas, wherein the valves are preferably designed in the form of shut-off valves and / or metering valves and / or ball valves and / or flaps. The valves can preferably be controlled electronically and / or magnetically and / or pneumatically, preferably remotely controllable wirelessly, e.g., from the measuring unit.

[0023] With regard to a targeted, controllable transfer of a gas from a line section into a gas reservoir, it can advantageously be further provided that the measuring unit has at least one measuring device for measuring a volume and / or mass flow and / or a plurality of sensors for detecting a current pressure and / or a current gas composition, wherein preferably a plurality of sensors are arranged on the suction side and pressure side of a compressor unit. For example, a sensor unit can be arranged on the inlet side and be provided to detect a pressure of the gas within the gas-carrying line section in order to determine a residual quantity of gas and thus a time from which a purge gas is supplied based on the pressure measurement. Furthermore, sensors which determine a pressure and / or composition of a gas can be provided, for example, downstream of a separation unit.using a mass spectrometric and / or gas chromatographic method. Based on these measurements, a gas or purge gas can then be discharged into a reservoir or the atmosphere, preferably based on a successful separation. However, if the measuring unit's sensors detect, for example, that sufficient separation between a purge gas and a gas has not yet occurred, the separation can be repeated.

[0024] Within the scope of simple and controllable control of the introduction of a purge gas into a gas-carrying line section, it can advantageously be provided that the supply device for supplying a purge gas into the gas-carrying line section is designed in the form of a pressure vessel connectable to the gas-carrying line section. The supply device preferably has a valve for introducing the purge gas into the gas-carrying line section, wherein the valve is in particular operable in an automated manner. For example, the valve can be coupled to a pressure sensor of the measuring unit and open upon detection of a pressure corresponding to a residual amount of gas, so that a purge process can be initiated automatically.

[0025] With a view to a simple, climate-friendly, and safe discharge of a purge gas, it can advantageously be provided that at least one discharge line is provided for discharging a purge gas, wherein the discharge line has at least one first sensor for detecting a pressure and / or a composition of a separated purge gas. In this way, it can be ensured that a purge gas is discharged only at a defined purity level.

[0026] In the context of a simple, cost-effective and sustainable transfer of a gas from a gas-carrying pipeline section, it is also conceivable that the gas reservoir is a pressure vessel or a gas-carrying pipeline section.

[0027] In the context of a versatile applicability of the subject system, it can further be provided according to the invention that the system is designed to be mobile, wherein the system preferably has wheels for rolling, wherein the system is arranged, for example, on a mobile trailer.

[0028] With a view to providing a mobile device that can be used as versatilely and autonomously as possible for the controlled removal of a gas from a gas-carrying pipeline section, it is also conceivable that lighting means for lighting and / or a power generator for power supply and / or means for remote site monitoring are provided.

[0029] Further advantages, features, and details of the invention will become apparent from the following description, in which exemplary embodiments of the invention are described in detail with reference to the drawings. The features mentioned in the claims and in the description may be essential to the invention individually or in any combination.

[0030] They show: Fig. 1 is a schematic representation of the individual steps of a method according to the invention for discharging a gas from a gas-carrying line section, Fig. 2 is a schematic representation of a system according to the invention for discharging a gas from a gas-carrying line section according to a first embodiment at a first time, Fig. 3 is a schematic representation of a system according to the invention for discharging a gas from a gas-carrying line section according to a first embodiment at a second time.

[0031] Fig. 1 shows a schematic representation of the individual steps of a method according to the invention for discharging a gas from a gas-carrying line section 4.

[0032] As per Fig. 1 As can be seen, the method according to the invention comprises the steps of transferring 100 a first quantity of the gas from the gas-conducting line section 4 into a gas reservoir 8, supplying 200 a purge gas into the gas-conducting line section 4 from the detection of a residual quantity of the gas within the gas-conducting line section 4 and transferring 300 the residual quantity of the gas from the gas-conducting line section 4 into the gas reservoir 8, wherein the residual quantity of the gas from the gas-conducting line section 4 is transferred into the gas reservoir 8 via a separation unit 10 for separation from the supplied purge gas.

[0033] The first quantity and / or the remaining quantity of the gas can be transferred from the gas-carrying line section 4 into the gas reservoir 8 via a compressor unit 6, wherein the compressor unit 6 can preferably be designed in the form of a pump, in particular in the form of a Roots pump, piston pump or diaphragm pump.

[0034] The remaining amount of gas can be separated from the supplied purge gas from the gas-carrying line section 4 within a bypass line 24a via a separation unit 10.

[0035] A detection of a residual amount of gas within the gas-carrying line section 4, from which a purge gas is supplied, is preferably carried out via a pressure measurement, wherein the purge gas is supplied in particular from the detection of a critical pressure, for example from a total or partial pressure of less than 5 bar, in particular of less than 1 bar.

[0036] Air and / or nitrogen can preferably be used as purge gas, which are then separated from the residual amount of gas and preferably released into the atmosphere.

[0037] The gas to be discharged from the gas-carrying line section 4, on the other hand, can preferably be a greenhouse gas, in particular natural gas, or can be in the form of hydrogen or can be hydrogen.

[0038] Alternatively, the gas to be discharged from the gas-carrying line section 4 may also be a harmful gas and / or toxic gas, such as CO, H 2 S, chlorine gas or NH 3.

[0039] The remaining amount of gas from the gas-carrying line section 4 can preferably be separated from the purge gas using at least one of the following methods: chemical absorption process, adsorption process, distillation process, membrane separation process, cryogenic separation process.

[0040] Fig. 2 shows a schematic representation of a system 2 according to the invention for discharging a gas from a gas-carrying line section 4 according to a first embodiment at a first time.

[0041] As per Fig. 2 As can be seen, the system 2 comprises a first connection element 12a for connection to a gas-carrying line section 4, a second connection element 12b for connection to a gas reservoir 8, a line system 14 arranged between the first and second connection elements 12a, 12b for transferring the gas from the gas-carrying line section 4 into the reservoir 8, a measuring unit 18 for detecting 200 a residual amount of gas within the gas-carrying line section 4, a supply device 16 for supplying 200 a purge gas into the gas-carrying line section 4 upon detection of a residual amount of gas, and a separation unit 10 for separating the residual amount of gas from the supplied purge gas when transferring 300 the residual amount of gas from the gas-carrying line section 4 into the gas reservoir 8.

[0042] As per Fig. 2 As can be seen, the system 2 additionally has a compressor unit 6 in the form of a Roots pump for transferring the first quantity and the remaining quantity of gas from the gas-carrying line section 4 into the gas reservoir 8.

[0043] The separation unit 10 is arranged within a bypass section 24, which has a first and second bypass valve 24a for separation. The bypass section 24 is arranged on the suction side of the compressor unit 6. It is understood that the bypass section 24 can alternatively also be arranged on the pressure side of the compressor unit 6.

[0044] The separation unit 10 may preferably comprise a chemical absorption unit and / or an adsorption unit and / or a distillation unit and / or a membrane and / or a cryogenic separation unit.

[0045] Optionally, additional valves 20 can be arranged in the line system 14, in particular—as shown—between the bypass section 24 or—as not shown here—at the inlet of the first and second connection elements 12a, 12b. The valves 20 can preferably be controlled wirelessly, in particular via the measuring unit 18.

[0046] As per Fig. 2 As can also be seen, the measuring unit 18 has measuring devices 30 for measuring various volume and / or mass flows as well as a plurality of sensors 28 for detecting a current pressure and / or a current gas composition, which sensors are positioned at different positions of the system 2 and are connected to the measuring unit 18 via control lines 26.

[0047] The supply device 16 for supplying 200 a purge gas into the gas-carrying line section 4 also has a valve 20 for introducing the purge gas into the gas-carrying line section 4 and can, for example, be designed in the form of a pressure vessel that can be connected to the gas-carrying line section 4.

[0048] In addition, two discharge lines 22 are provided for discharging the purge gas, each of which also has a sensor 28 for detecting a pressure and / or a composition of the separated purge gas.

[0049] The gas reservoir 8 can also be designed in the form of a pressure vessel or a gas-carrying line section.

[0050] For the most flexible use of the system 2 in question, it can also be provided that the system 2 is designed to be mobile, wherein the system 2 preferably has wheels for rolling and is arranged, for example, on a mobile trailer.

[0051] As per Fig. 2 As shown, the valve 20 arranged between the bypass section 24 is opened and the gas is conveyed from the gas-carrying line section 4 via the compressor unit 6 into the gas reservoir, whereby the black arrows drawn along the line system 14 indicate the flow direction of the gas.

[0052] Fig. 3 shows a schematic representation of the system 2 according to the invention for discharging a gas from a gas-carrying line section 4 according to a first embodiment at a second time.

[0053] As per Fig. 3 As can be seen, at the second point in time, from the registration of a critical pressure via the measuring unit 18 using the sensor 28 positioned close to the gas-carrying line section 4, the valve 20 arranged between the bypass section 24 is closed. At the same time, the bypass valves 24 and the valve 20 on the feed device 16 are opened, so that from the second point in time, a purge gas is fed 200 into the gas-carrying line section 4 and the remaining amount of gas is transferred 300 together with the purge gas via the bypass section and the separation unit 10 into the gas reservoir 8. The remaining amount of gas from the gas-carrying line section 4 is separated from the purge gas via the separation unit 10 and transferred into the gas reservoir 8.The purge gas separated from the gas, which can preferably be in the form of air, can then be released to the atmosphere via the discharge lines 22 in the form of oxygen and nitrogen. The gas transferred from the gas-carrying line section 4 into the gas reservoir 8 can preferably be in the form of natural gas, which can be discharged in pure form in a climate-friendly manner without causing CO2 equivalent emissions. The gas can also be in the form of hydrogen, for example.

[0054] By means of the method according to the invention or the system 2 according to the invention for discharging a gas from a gas-carrying line section 4, it is thus possible to ensure a fast, safe, cost-efficient and environmentally friendly discharge of a gas from a gas-carrying line section. Bezuaszeichenliste

[0055] 2System for discharging a gas 4Gas-carrying line section 6Compressor unit 8Gas reservoir 10Separation unit 12aFirst connection element 12bSecond connection element 14Pipe system 16Supply device 18Measuring unit 20Valve 22Discharge line 24Bypass section 24aBypass valve 26Control line 28Sensor 30Measuring device 100Transferring a first quantity of a gas from a gas-carrying line section into a gas reservoir 200Supplying a purge gas into the gas-carrying line section 300Transferring a residual quantity of the gas from the gas-carrying line section into the gas reservoir

Claims

1. A method for discharging a gas from a gas-carrying line section (4), comprising the steps of: - transferring (100) a first amount of the gas from the gas-carrying line section (4) into a gas reservoir (8), - supplying (200) a purge gas into the gas-carrying line section (4) upon detection of a residual amount of the gas within the gas-carrying line section (4), - transferring (300) the residual amount of the gas from the gas-carrying line section (4) into the gas reservoir (8), - wherein the residual amount of the gas from the gas-carrying line section (4) is transferred into the gas reservoir (8) via a separation unit (10) for separation from the supplied purge gas.

2. Method according to claim 1, characterized by thatthe first quantity and / or the remaining quantity of the gas is transferred from the gas-carrying line section (4) into the gas reservoir (8) via a compressor unit (6), wherein the compressor unit (6) is preferably designed in the form of a pump, in particular in the form of a Roots pump.

3. Method according to claim 1 or 2, characterized by that the remaining amount of gas from the gas-carrying line section (4) is separated from the supplied purge gas within a bypass line (24a) via a separation unit (10).

4. Method according to one of the preceding claims, characterized by thata detection of a residual amount of gas within the gas-carrying line section (4), from which a purge gas is supplied, is carried out via a pressure measurement, wherein the purge gas is preferably supplied from the detection of a critical pressure, wherein the critical pressure is in particular less than 5 bar, and / or that the purge gas is released into the atmosphere after separation from the residual amount of gas, wherein air and / or nitrogen is preferably used as the purge gas.

5. Method according to one of the preceding claims, characterized by that the gas to be discharged from the gas-carrying line section (4) is a greenhouse gas or comprises a greenhouse gas, wherein the gas to be discharged from the gas-carrying line section (4) is preferably natural gas or comprises natural gas, and / or thatthe gas to be discharged from the gas-carrying line section (4) is or comprises a harmful gas and / or toxic gas, wherein the gas to be discharged from the gas-carrying line section (4) is preferably CO, H 2 S or chlorine gas.

6. Method according to one of the preceding claims, characterized by that the residual amount of gas from the gas-carrying line section (4) is separated from the purge gas by at least one of the following processes: - chemical absorption process, - adsorption process, - distillation process, - membrane separation process, - cryogenic separation process.

7. A system (2) for discharging a gas from a gas-conducting line section (2), in particular for carrying out a method according to one of the preceding claims, comprising: - a first connection element (12a) for connecting to a gas-conducting line section (4), - a second connection element (12b) for connecting to a gas reservoir (8), - a line system (14) arranged between the first and second connection elements (12a, 12b) for transferring the gas from the gas-conducting line section (4) into the reservoir (8), - a measuring unit (18) for detecting (200) a residual amount of gas within the gas-conducting line section (4), - a supply device (16) for supplying (200) a purge gas into the gas-conducting line section (4) upon detection of a residual amount of gas,- a separation unit (10) for separating the residual amount of gas from the supplied purge gas when transferring (300) the residual amount of gas from the gas-carrying line section (4) into the gas reservoir (8)., 8. System (2) according to one of the preceding claims, characterized by that the separation unit (10) comprises a chemical absorption unit and / or an adsorption unit and / or a distillation unit and / or a membrane and / or a cryogenic separation unit.

9. System (2) according to one of the preceding claims, characterized by that a compressor unit (6) is provided for transferring a first quantity and / or a residual quantity of a gas from the gas-conducting line section (4) into the gas reservoir (8), wherein the compressor unit (6) is preferably designed in the form of a pump, in particular in the form of a Roots pump.

10. System (2) according to one of the preceding claims, characterized by thatthe separation unit (10) is arranged within a bypass section (24), wherein the bypass section (24) preferably has a first and second bypass valve (24a), wherein the bypass section (24) is preferably arranged on the suction side of the compressor unit (6).

11. System (2) according to one of the preceding claims, characterized by that the first and second connection elements (12a, 12b) have valves (20) for introducing and discharging a gas, wherein the valves (20) are preferably designed in the form of shut-off valves and / or metering valves and / or ball valves and / or flaps.

12. System (2) according to one of the preceding claims, characterized by thatthe measuring unit (18) has at least one measuring device (30) for measuring a volume and / or mass flow and / or a plurality of sensors (28) for detecting a current pressure and / or a current gas composition, wherein preferably a plurality of sensors (128) are arranged on the suction side and pressure side of a compressor unit (6).

13. System (2) according to one of the preceding claims, characterized by that the supply device (16) for supplying (200) a purge gas into the gas-carrying line section (4) is designed in the form of a pressure vessel connectable to the gas-carrying line section (4), wherein the supply device (16) preferably has a valve (20) for introducing the purge gas into the gas-carrying line section (4), wherein the valve (20) is in particular operable in an automated manner.

14. System (2) according to one of the preceding claims, characterized by thatat least one discharge line (22) is provided for discharging a purge gas, wherein the discharge line (22) has at least one first sensor for detecting a pressure and / or a composition of a separated purge gas, and / or that the gas reservoir (8) is a pressure vessel or a gas-conducting line section.

15. System (2) according to one of the preceding claims, characterized by that the system (2) is mobile, wherein the system (2) preferably has wheels for rolling, and / or wherein the system (2) is arranged in particular on a mobile trailer, that Lighting means for illumination and / or a power generator for power supply and / or means for remote site monitoring are provided.

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