Sample removal device for removing a sample from a system part conveying a liquid medium, and method for removing such a sample

Abstract

The invention relates to a sample removal device (1) for removing a sample from a liquid medium located in a system, with a sample holder (16) into which the removed sample can be introduced via a feed device. A defined, reproducible sample removal from a system is achieved in that the feed device has a line arrangement (4) which is provided on the inlet side with a connection unit (10) which is or can be coupled in a medium-conducting manner to a system part (2) of the system and on the outlet side with a discharge portion which is or can be brought into connection, in a medium-conducting manner, with the sample holder (16), and has an openable and closable closure device.

Description

[0001]

[0002] Sampling device for taking a sample from a part of a system carrying a liquid medium and method for taking such a sample

[0003] The invention relates to a sampling device for taking a sample from a liquid medium located in a system, comprising a sample receptacle into which the sample taken can be introduced via a feed device, as well as to a method for taking a sample from a liquid medium located in a part of the system by means of a sample receptacle into which the sample is introduced via a feed device, and further to a use of such a sample receptacle and an application of the method.

[0004] A sampling device for taking a sample from a liquid medium of this type conducted in a system, as described in EP 2 405 251 A2, has a feed device that is coupled or can be coupled to a suitable location in the system and that has a receptacle assigned to its output side for feeding the sample taken from the liquid medium in a specific quantity. Another sampling device and a method for taking a sample from a liquid medium conducted in a system, in particular for analyzing biological material, is shown in US Pat. No. 5,902,746 A. To form a seal at various locations in a conduit system, the liquid medium can be frozen, and the seal can be opened again by applying electrical energy while heating.

[0005] A sampling device shown in DE 1 955 988 A is designed in particular for sampling liquid metals and for the chemical analysis of liquid metal melts for impurities in nuclear reactor circuits.

[0006] The repeated taking of a sample from a liquid medium in a plant is useful, and often even necessary, in order to determine changes in the properties of the medium by analyzing the sample. Thus, by regularly taking and analyzing samples taken from the liquid medium during operation of the plant, such as a chemical reactor, thermal storage facility, or other storage facility that uses, for example, molten inorganic salts, nitrate salts, chloride salts, or carbonate salts at temperatures of 150°C to 800°C as a working medium or heat transfer medium, the long-term stability of the salt and of components that come into contact with it can be checked and appropriate measures can be taken. In such plants, taking a sample using conventional sampling devices of the type mentioned is cumbersome, time-consuming, and potentially dangerous due to the manual sampling. Foregoing sampling, for example,from salt-based systems, can lead to problems with salt corrosion, e.g., thermally induced decomposition reactions or corrosion reactions, not being detected in a timely manner. This can also lead to components corroding unnoticed, the salt decomposing, and thus unforeseen system failures or even health hazards. The present invention is based on the object of providing a sampling device of the type mentioned above, with which the automated taking of samples from the ongoing operation of a system or from a system component thereof (such as a pipeline, tank, or other components) is enabled as safely and reproducibly as possible, and to specify a corresponding method and an application.

[0007] This object is achieved for the sampling device with the features of claim 1 and for the method with the features of claim 14. A use of the sampling device is specified in claim 17 and an application of the method is specified in claim 18.

[0008] In the sampling device, it is provided that the supply device has a line arrangement which is provided on the inlet side with a connection unit which is coupled or can be coupled to a part of the system in a medium-conducting manner and on the outlet side with a discharge section which is connected or can be connected to the sample holder in a medium-conducting manner and has an openable and closable closure device.

[0009] By means of the line arrangement coupled to the system component for the medium introduction and the sample intake connected to the medium outlet side, as well as the openable and closable closure device, automated sampling is achieved during ongoing system operation without endangering persons. This enables expedient, repeated and reproducible sampling, particularly at higher temperatures of, for example, between 100 °C and 1600 °C, preferably between 150 °C and 800 °C, such as with molten inorganic salts used as the working medium or heat transfer medium in a system. Automated sampling designed in this way is also suitable for other liquid media, such as corrosive media. Sampling can be carried out, controlled, or regulated precisely using a control device.

[0010] Corresponding advantages also arise in the method in which it is provided that a line arrangement of the feed device is connected to the system part and a defined quantity of the medium is fed as a sample into the sample holder by opening the flow path through the line arrangement and after reaching the defined quantity in the sample holder, the flow path is closed.

[0011] Corresponding advantages also arise from the use of the sampling device according to claim 17 and the application of the method according to claim 18.

[0012] The fact that the feed device has a pressure reduction device in an inlet area contributes to precise sampling.

[0013] Precisely reproducible, defined sampling is further facilitated by the fact that the pressure reducing device has a pipe with a reduced cross-section relative to the connection unit or a nozzle part with a narrowing part directed towards the inlet side.

[0014] Exact controllability and thus also reproducibility of the sampling is advantageously further promoted by the fact that the pressure reducing device has a pressure compensation device or flow limiting device arranged downstream of the nozzle part, if present, in particular designed as a passive fluidic valve, for example a Tesla valve.

[0015] Further advantages for metered sampling arise from the fact that the feed device has a laminarization section, in particular designed as a metering lance, wherein the laminarization section is arranged downstream of the pressure reduction device in the flow direction when designed according to one of claims 2 to 4.

[0016] Furthermore, there are advantages for the control and regulation of the sampling process in that the closure device can be controlled automatically and / or time-dependently depending on the sample size to be taken and / or the temporal sequence of the sampling.

[0017] A reliable function of the closure device and a construction which protects the components are obtained in that the closure device, which is preferably arranged in the outlet region of the feed device, has a temperature control device which, for closing, has a freezing device which forms a closure plug by freezing the medium, in particular by free or forced convection, and for opening, has a heating device which dissolves the closure plug, in particular by preventing convection by means of an insulating body or air flow inhibitor.

[0018] A functionally advantageous design is that the freezing device has a fan that generates a cooling air flow around a line section of the line arrangement, in particular around the laminarization section.

[0019] Further advantages for the design are achieved by the fact that the heating device has an actively energized trace heating system and / or is operated passively using the heat of the supplied medium.

[0020] The measures contributing to the good function and efficiency of the temperature control device include a heat-conducting unit that is thermally connected to the line arrangement, in particular one provided with cooling fins. Precise controllability of the sampling process is also advantageously supported by the fact that the supply device has a pressure differential regulating device associated with the line arrangement, which comprises a pressure regulating unit arranged in a bypass line, which effects pressure differential regulation, in particular, across the area of ​​the temperature control device.

[0021] A further advantageous design of the sampling device is that the feed device is provided on the output side with an adjustment device comprising a sample-taking part and a waste-taking part. The adjustment device comprises an adjustment part mounted on a support unit, wherein the sample receptacle is associated with the sample-taking part and a waste receptacle is associated with the waste-taking part. The adjustment part is preferably secured to the system part by a fastening part.

[0022] A further advantageous embodiment for the structure and function is that the adjustment device is designed as a linear table or rotary table, which further comprises a guide part and a drive unit for adjusting the adjustment part from a rest position in which the diverting section of the line arrangement is closed, into a waste removal position in which the waste removal part is assigned to the diverting section of the line arrangement or into a sample removal position in which the sample removal part is assigned to the diverting section of the line arrangement, and back.

[0023] Advantageous embodiments of the method consist in that the flow path is closed by freezing the medium in a section of the line arrangement to form a closure plug and in that the flow path is opened by dissolving the closure plug by means of heat, and further in that, before taking the sample, a waste quantity of the medium located at least in the line arrangement is guided into a waste receptacle by opening the flow path and then closing it.

[0024] The invention will be explained in more detail below using exemplary embodiments with reference to the drawings. In the drawings:

[0025] Fig. 1 is a schematic representation of a sampling device connected to a part of a plant,

[0026] Fig. 2 shows a sampling device according to Fig. 1 supplemented with a pressure difference regulating device,

[0027] Fig. 3 shows a further embodiment of the sampling device in perspective view,

[0028] Fig. 4 shows a partially cutaway section of the sampling device according to Fig. 3 in its connection area on the system part and

[0029] Fig. 5 shows a further section of the sampling device according to Fig. 3 in its receiving area for the sample.

[0030] Fig. 1 shows an embodiment of a sampling device 1 which is coupled to a system component 2 of a system (not shown in detail) by means of a connection unit 10. The system with the system component 2 carries a liquid medium which generally has a corrosive effect on system components which come into contact with it. For example, the system is a chemical reactor or thermal or other storage device which uses, for example, molten inorganic salt, such as nitrate salt, chloride salt or carbonate salt at an elevated temperature in the range between 100 °C and 1600 °C, often between 150 °C and 800 °C, as the working medium or heat transfer medium. The liquid medium is generally under increased pressure, e.g. in the order of magnitude of a few bar or a few tens of bar.

[0031] The sampling device 1 has a feed device comprising the connection unit 10 and a line arrangement 4 connected thereto, via which feed device a sample taken from the liquid medium conducted in the system is fed into a sample receptacle 16. The line arrangement 4 has, connected to the connection unit 10, a pipe 11 whose cross-section is reduced compared to the inlet section of the connection unit 10, which pipe leads to the sample receptacle 16 via a pressure compensation device 12 or a flow restrictor, which is designed, for example, as a Tesla valve, via a further section of the line arrangement 4 in which a closure device is arranged. In the exemplary embodiment shown, the sample receptacle 16 can be assigned to a discharge section of the line arrangement 4 provided with an outlet, alternately with a waste receptacle 15, such as, for example, a waste container. A predeterminable orThe predetermined quantity of the liquid medium withdrawn from the system can be automatically adjusted by appropriate time-dependent and / or quantity-dependent control of a control device controlling the sampling device 1, in particular the closure device, to obtain a defined sample, for example, also under control by means of a control device. This results in reproducible sampling, e.g., at predeterminable time intervals or event-dependently, without endangering an operator and / or subject to operator-related errors.

[0032] In the embodiment shown in Fig. 1, the closure device is designed in a special way by means of a temperature control device 13. In this case, to close the line arrangement 4, in particular in its outlet region, a portion of the withdrawn liquid medium itself is used as a closure element in that it is cooled by means of the temperature control device 13 in a section of the line arrangement 4 to below its solidification temperature, so that a closure plug forms by freezing. For this purpose, the temperature control device 13 has a cooling device, for example comprising a fan 132, by means of which a cooling air flow is generated around the relevant line section carrying the liquid medium. For heat dissipation, the line section is expediently provided with a heat conducting unit 131, for example having cooling fins.The closure plug eliminates the need for other closure components and prevents corrosion reactions and the resulting functional impairments. To guide the liquid medium to be passed through for sampling into the sample receptacle 16, the fan 132 can be switched off, and the heat of the supplied liquid medium itself can be used as a passive heat source. Alternatively or additionally, the temperature control device 13 is provided with a heating device 130 as a trace heating device, which is designed, for example, as an electrical heating device. The heat from this heating device, for example, when the fan 132 is switched on, is supplied via the heat conduction unit 131 to the line section with the closure plug, which then dissolves or melts, so that the liquid medium flows into the sample receptacle 16 in a controlled manner.The quantity of the liquid medium guided through the line arrangement 4, in particular also the relevant section thereof, as well as the cooling capacity of the temperature control device 13 and the heating energy are coordinated with one another in such a way that a relevant quantity of the liquid medium reaches the sample receptacle 16 as a sample under the control or regulation of the closure device thus formed by means of the control device.

[0033] As further shown in Fig. 1 and mentioned above, the sampling device 1 also has the waste receptacle 15, which can be assigned to the outlet of the line arrangement 4 in a waste removal function instead of the sample receptacle 16 by means of the adjustment device 3. This allows at least a portion of the medium located in the line arrangement 4 that is not meaningful for the sample or its analysis to be separated before a sample is taken. For this purpose, the closure device, for example the temperature control device 13, can be controlled by supplying heat such that the line arrangement 4 is opened by dissolving the closure plug to discharge the waste quantity of the liquid medium into the waste receptacle 15. The sample receptacle 16 can then be assigned back to the outlet of the line arrangement 4 in order to take a relevant (current) quantity of the liquid medium from the system as a sample.To move the waste receptacle 15 from the waste removal position and the sample receptacle 16 into the sample removal position, the line arrangement 4 can be closed by actuating the closure device, for example by forming the closure plug.

[0034] The sampling device 1 shown in Fig. 1 therefore operates, for example, as follows: Before sampling, all controllable components, in particular the closure device or temperature control device 13, are switched off. The heat conduction unit 131, in particular the cooling fins, are dimensioned such that free convection is sufficient to dissipate the heat coming from the hot system part 2 and to retain a solidified closure plug or salt plug in the area of ​​the line arrangement 4 with the heat conduction unit 131. The waste receptacle 15 with the waste container is assigned to the discharge section or arranged below the outlet.

[0035] For the rinsing process with the waste removal function, both the fan 132 and the heat source of the heating device 130 are switched off. The heating device 130 is dimensioned such that, despite the additional cooling effect of the fan 132, it can quickly melt the sealing plug in the relevant section of the line arrangement 4. Once the sealing plug has melted, the medium or liquid salt flows into the waste receptacle with the waste container. The medium flow or salt flow is regulated by the pressure compensation device 12 or the flow limiter, in particular in the form of a Tesla valve. For sampling, the heating device 130 can now be briefly switched off, whereby the temperature in the relevant section of the line arrangement 4 drops drastically due to the strong cooling effect of the fan 132 and a sealing plug forms again. The medium flow is now briefly interrupted.The sample receptacle 16 with a sample container is now assigned to the discharge section or moved below its outlet. The heating device 130 with the heat source is then switched on again, and the sealing plug melts again. The medium now flows into the sample receptacle 16 in a regulated manner through the pressure compensation device 12 or the flow restrictor, in particular the Tesla valve. An interruption of the medium flow can also be omitted.

[0036] After sampling, the heating device 130 is first switched off. Fan 132 initially remains switched on to reduce the temperature in the relevant section of the line arrangement 4 as quickly as possible. A plug forms again. Fan 132 is then also switched off.

[0037] In this way, liquid molten salt, for example, can be advantageously defined as a liquid medium and reproducibly withdrawn from a respective plant, such as from a thermal energy storage system in the field of solar thermal power plants or from salt-driven reactors, such as endothermic or exothermic reactors.

[0038] In the embodiment shown in Fig. 2, in contrast to the design according to Fig. 1, there is additionally provided a pressure difference regulating device 17 which has a bypass to the line arrangement 4 with a pressure regulating unit 170. The bypass is connected on the inlet side to the outlet region of the line arrangement 4 and the region of the waste receptacle 15 or sample receptacle 16 arranged there and is led back into an area in the flow direction upstream of the temperature control device 13 or the pressure equalization device 12, e.g. to the pipeline 11, as can be seen from Fig. 2. The pressure difference regulating device 17 thus regulates the pressure difference between the internal system pressure and a sample chamber in which the sample is taken from the line arrangement 4, wherein the pressure difference control has self-regulating components. The pressure regulating unit 170 arranged in the bypass is based, for example, on the formation of a gas cushion oron the use of a flexible membrane. In the embodiment shown in Fig. 2, an output pressure of 1 bar is achieved in the sample chamber area at a system pressure of, for example, 20 bar. This allows a reproducible sample to be taken in a defined and simple manner.

[0039] In the embodiment shown in Fig. 3, the sampling device 1 is also connected to a system part 2 by means of a flange connection, and a feed device with a line arrangement 4 is provided, at the discharge section or outlet of which a sample receptacle 16 can be arranged alternately with a waste receptacle 15. The adjustment between the sample receptacle 16 in the sampling position and the waste receptacle 15 in the waste removal position is also carried out by means of an adjustment device 3, wherein the adjustment device 3 in this embodiment is designed as a linear table. In this embodiment, the line arrangement 4 also contains a closure device which has a temperature control device 13, in particular of the structure described above, for the defined supply of liquid medium as a sample.Before the sample is taken, at least a quantity of waste present in the line arrangement 4 is discharged into the waste receptacle 15 in a rinsing process. A dosing lance is installed in the line arrangement, in this case following a pressure equalization device 12, in particular a Tesla valve, by means of which a laminarization section 14 is formed for the liquid medium being passed through and a connection is created to a control slide present in the adjustment device 3 or an adjustment part, wherein the laminarization section 14 is closed by the control slide or opens in the waste removal position or the sample removal position. In addition to the created mechanical closure, for example, with an opening width of 1 mm to 3 mm, the liquid medium, e.g., a salt flow, can be efficiently cooled to form a closure plug and warmed to dissolve it.

[0040] As shown in Fig. 4, a nozzle section is formed in the inlet area of ​​the line arrangement 4. This nozzle section narrows continuously, e.g., conically, toward the inlet area or system component 2 and actively reduces the pressure of the liquid medium coming from system component 2 by increasing the pipe cross-section while maintaining a constant flow rate. The subsequent pressure equalization device 12, e.g., the Tesla valve, then serves to further reduce the pressure or equalize gas or medium pressures.

[0041] As shown in Fig. 5, the adjustment device 3, designed as a linear table, has a guide part 30 and a drive unit 31, which engages, for example, by means of a gear, in a rack for adjusting the adjustment part of the adjustment device 3. The adjustment part has a sample removal part 32 with the sample receptacle 16 and a waste removal part 36, which is coupled to the waste receptacle 15 and has a free jet piece 33 leading to the waste removal part 36, via which a waste quantity of the removed medium can be guided into the waste receptacle 15. Furthermore, the linear table can be provided with a closure part 34 for closing the outlet of the line arrangement 4 in a rest position and also with a freezing part 35 in order to form a closure plug by freezing the liquid medium in the outlet region of the line arrangement 4.Furthermore, a heating device can be integrated into the linear table as a trace heating device for dissolving the sealing plug for the removal of the liquid medium.

[0042] The pressure equalization device 12, in particular the Tesla valve and the nozzle section 110, are permanently heated, for example, passively by the heat of the liquid medium or salt circuit and / or actively heated, to prevent plug formation. The laminarization section 14 or the dosing lance is unheated and, in the neutral position (when the freezing section 35 is located underneath), is passively cooled from one side by the freezing section 35, so that a sealing plug forms in the laminarization section or the dosing lance, which prevents the flow of medium from the freezing section 35 or the discharge section of the line arrangement 4 when no medium sample is taken.

[0043] During sampling, the heating device of the linear table in the area of ​​the free jet section 33 (zone 1), the sampling section 32 (zone 2), and the closure section 34 (zone 3) is switched on and heated, for example, to approximately 300°C. This heats up the relevant line section, in particular the laminarization section 14 or the dosing lance, and the closure plug, e.g., a salt plug, dissolves by melting. The adjustment part of the linear table moves from zone 3 (closure section) to the position of zone 1 (free jet section), and liquid medium flows into the waste receptacle 15 or the waste container. After rinsing the sampling device, which can be determined, for example, based on the increase in weight of the waste receptacle or the waste container, the linear table is moved to the position of zone 2 (sampling section). The sample holder or a sample container is filled with a relevant amount of liquid medium orSalt is filled. After filling the sample holder, the linear stage is moved to the freezing section position (Zone 4). Simultaneously with the adjustment, the heating of the laminarization section 14 or the dosing lance is switched off by the heating device or trace heating. A sealing plug forms in the laminarization section 14.

[0044] With corresponding function and analogous components such as the linear table, a design of the sampling device 1 with a rotary table can also be constructed.

[0045] The sampling device 1 can be used in any fluidic system that operates with liquid, corrosive media, particularly at temperatures above 100°C, preferably above 150°C. Samples can be taken automatically during operation for later analysis, without requiring any changes to operating parameters, as may be necessary for a person taking the sample in order to avoid endangering them. Sampling is or can be carried out automatically, with appropriate control via control technology being possible. Sampling can be carried out either at predefined times, e.g., at constant intervals, or event-dependently, including on weekends or at night. Sampling is reproducibly carried out in the same manner every time. Due to the intrinsic pressure control, a sample can also be taken from pressurized locations without endangering persons.

[0046] The sampling device can be easily adapted to the system or system component 2 (such as a pressurized pipe, container, valve, or the like). Pressure fluctuations in system components are compensated for by the sampling device with simple components, whereby a corresponding pressure reduction or pressure difference regulation is also achieved during sampling between the system's internal pressure and the sample chamber.

[0047] Sampling is carried out from a representative, relevant, medium-carrying area of ​​the system, thus avoiding sampling from dead space volumes or non-representative peripheral areas. Sampling is advantageously carried out, for example, from a continuously flowing free jet, and especially after flushing the sampling device with system fluid, whereby the medium flow or salt flow can be interrupted in a controlled manner.

[0048] By forming the closure device by means of the temperature control device 13 while freezing the sampled medium, leaks and unwanted salt discharge are avoided, while salt creep into seals and other gaps after sampling is prevented.

Claims

Claims 1. Sampling device (1) for taking a sample from a liquid medium located in a system, having a sample receptacle (16) into which the taken sample can be introduced via a feed device, characterized in that the feed device has a line arrangement (4) which is provided on the inlet side with a connection unit (10) which is or can be coupled to a part of the system (2) of the system in a medium-introducing manner and on the outlet side with a discharge section which is or can be connected to the sample receptacle (16) in a medium-conducting manner and has an openable and closable closure device.

2. Sampling device according to claim 1, characterized in that the supply device has a pressure reducing device in an inlet area.

3. Sampling device according to claim 2, characterized in that the pressure reducing device has a pipe (11) provided with a reduced cross-section relative to the connection unit (10) or a nozzle part (110) with a narrowing part directed towards the inlet side.

4. Sampling device according to claim 2 or 3, characterized in that the pressure reducing device has a pressure compensation device (12) arranged downstream of the optionally present nozzle part (11), in particular designed as a passive fluidic valve, for example a Tesla valve.

5. Sampling device according to one of the preceding claims, characterized in that the feed device has a laminarization section (14), in particular designed as a dosing lance, wherein the laminarization section (14) is arranged downstream of the pressure reduction device in the flow direction when designed according to one of claims 2 to 4.

6. Sampling device according to one of the preceding claims, characterized in that the closure device can be automatically controlled in an event-dependent and / or time-dependent manner depending on the sample size to be taken and / or the temporal sequence of the sampling.

7. Sampling device according to one of the preceding claims, characterized in that the closure device, preferably arranged in the outlet region of the feed device, has a tempering device (13) which, for closing, has a freezing device forming a closure plug by freezing the medium, in particular by free or forced convection, and for opening, has a heating device dissolving the closure plug, in particular by preventing convection by means of an insulating body or air flow inhibitor.

8. Sampling device according to claim 7, characterized in that the freezing device has a fan (132) generating a cooling air flow around a line section of the line arrangement (4), in particular around the laminarization section (14).

9. Sampling device according to claim 7 or 8, characterized in that the heating device has an actively energized trace heating system and / or is operated passively using the heat of the supplied medium.

10. Sampling device according to one of claims 7 to 9, characterized in that the temperature control device (13) has a heat conducting unit (131) which is connected to the line arrangement (4) in a heat-conducting manner and is provided in particular with cooling fins (5).

11. Sampling device according to one of the preceding claims, characterized in that the supply device has a pressure difference regulating device (17) associated with the line arrangement (4), which comprises a pressure regulating unit (170) arranged in a bypass line (171).

12. Sampling device according to one of the preceding claims, characterized in that the feed device is provided on the output side with an adjusting device (3) having a sampling part (32) and a waste removal part (36), which comprises an adjusting part mounted on a support unit, wherein the sample receptacle (16) is assigned to the sampling part (32) and a waste receptacle (15) is assigned to the waste sampling part (36).

13. Sampling device according to claim 12, characterized in that the adjusting device (3) is designed as a linear table or rotary table, which further comprises a guide part (30) and a drive unit (31) for adjusting the adjusting part from a rest position, in which the diverting section of the line arrangement is closed, into a waste removal position, in which the waste removal part (36) is assigned to the diverting section of the line arrangement (4), or into a sampling position, in which the sampling part (32) is assigned to the diverting section of the line arrangement (4), and back.

14. Method for taking a sample from a liquid medium located in a system part (2) by means of a sample holder (16) into which the sample is introduced via a feed device, characterized in that a line arrangement (4) of the feed device is connected to the system part (2) and a defined amount of the medium is fed as a sample into the sample holder (16) by opening the flow path through the line arrangement (4) and after reaching the defined amount in the sample holder (16) the flow path is closed.

15. The method according to claim 14, characterized in that the flow path is closed by freezing the medium in a section of the line arrangement (4) to form a closure plug and that the flow path is opened by dissolving the closure plug by means of heat.

16. Method according to claim 14 or 15, characterized in that before taking the sample, a waste quantity of the medium located at least in the line arrangement (4) is passed into a waste receptacle (15) by opening the flow path and then closing it.

17. Use of the sample collection device according to one of claims 1 to 13 for taking a sample from a chemical reactor or a storage device, such as a thermal storage device, wherein the liquid medium is a corrosive, in particular saline, fluid at a temperature above room temperature, in particular in the range between 100 °C and 1600 °C.

18. Application of the method for taking a sample from a liquid medium located in a plant part (2) of a plant according to one of claims 14 to 16, wherein the plant is a chemical reactor or a storage device, such as a thermal storage device, and the liquid medium is a corrosive, in particular saline, fluid, in particular at a temperature above room temperature, in particular in the range between 100 °C and 1600 °C.

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