Sampling device and sampling method for fluidized bed reactor

Abstract

The present application discloses a sampling device and a sampling method for a fluidized bed reactor. The sampling device comprises: a rotating mechanism, a first pipeline for connecting a fluidized bed reactor, a first valve arranged on the first pipeline, a first purge pipeline, a second valve arranged on the first purge pipeline, a sampling pipeline, and a sampling valve arranged on the sampling pipeline, wherein: at least one material flow pipeline is arranged in the rotating mechanism, and is used to drive at least one material flow pipeline to connect the first pipeline with the first purge pipeline or connect the first pipeline with the sampling pipeline through the rotation of the rotating mechanism. Therefore, the rotation of the material flow pipeline, as well as the opening or closing of the first valve, the second valve and the sampling valve, can be driven by the rotating mechanism to sample from the fluidized bed reactor A, thereby solving the problems in the prior art.

Description

Technical Field

[0001] The present application relates to the field of chemical synthesis, and in particular to a sampling device and a sampling method for a fluidized bed reactor. Background Art

[0002] In the catalytic synthesis process, it is usually necessary to sample and analyze the amount of catalyst, reaction raw materials, reaction products, etc. in the fluidized bed reactor, so as to adjust the reaction conditions according to the analysis results. For example, in the catalytic synthesis process of methylchlorosilane, it is necessary to regularly sample and analyze from the fluidized bed reactor, so as to adjust the reaction conditions according to the content of copper element in the silicon-copper combination obtained by analysis. Therefore, it is necessary to provide a sampling device for the fluidized bed reactor for sampling and analyzing from the fluidized bed reactor. Summary of the invention

[0003] The embodiments of the present application provide a sampling device and a sampling method for a fluidized bed reactor, which are used for sampling and analyzing from within a fluidized bed reactor.

[0004] The present application embodiment provides a sampling device, comprising: a rotating mechanism, a first pipeline for connecting a fluidized bed reactor, a first valve arranged on the first pipeline, a first purge pipeline, a second valve arranged on the first purge pipeline, a sampling pipeline, and a sampling valve arranged on the sampling pipeline, wherein:

[0005] At least one material flow pipeline is arranged in the rotating mechanism, and is used to drive at least one material flow pipeline to connect the first pipeline with the first purge pipeline or connect the first pipeline with the sampling pipeline through the rotation of the rotating mechanism.

[0006] Preferably, the rotating mechanism comprises an inner part and a driving device connected to the inner part.

[0007] Preferably, each of the material flow pipes is arranged inside the inner part.

[0008] Preferably, the sampling device further comprises: an outer part covering the inner part.

[0009] Preferably, the sampling device further comprises: a second purge pipeline and a third valve arranged on the second purge pipeline; then,

[0010] Two material flow pipes are symmetrically arranged in the rotating mechanism, and the rotation of the rotating mechanism can drive each of the material flow pipes to rotate to a purge position or a sampling position.

[0011] Preferably, the first pipe and the first purge pipe, the first purge pipe and the second purge pipe, and the second purge pipe and the sampling pipe are arranged at 90° to each other along the circumferential direction of the rotating mechanism.

[0012] Preferably, the first pipeline, the first purge pipeline, the second purge pipeline and the second purge pipeline are evenly arranged along the circumference of the rotating mechanism.

[0013] Preferably, the first valve, the sampling valve, the second valve and the third valve are all electric valves.

[0014] Preferably, one end of the first pipeline is connected to a fluidized bed reactor;

[0015] One end of the first purge pipeline is connected to a purge device; and,

[0016] One end of the second purge pipeline is connected to a second purge device.

[0017] The embodiment of the present application also provides a sampling method, the sampling device comprises: a rotating mechanism, a first pipeline connected to a fluidized bed reactor, a first valve arranged on the first pipeline, a first purge pipeline connected to a purge device, a second valve arranged on the first purge pipeline, a second purge pipeline connected to a second purge device, a third valve arranged on the second purge pipeline, a sampling pipeline and a sampling valve arranged on the sampling pipeline, wherein: the first pipeline and the first purge pipeline, the first purge pipeline and the second purge pipeline, and the second purge pipeline and the sampling pipeline are uniformly arranged at 90 degrees to each other along the circumference of the rotating mechanism; and two material flow pipelines are symmetrically arranged in the rotating mechanism; the method comprises:

[0018] By rotating the rotating mechanism, at least one material flow pipe is driven to connect the first pipe with the first purge pipe;

[0019] Opening the first valve and the second valve to perform purging through the purging device;

[0020] closing the first valve and the second valve;

[0021] Rotate the rotating mechanism 90° to rotate the purged material flow pipeline to connect the first pipeline and the sampling pipeline; and

[0022] Sampling is performed by controlling the first valve and the sampling valve.

[0023] At least one of the above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects:

[0024] The sampling device provided in the embodiment of the present application is adopted, and at least one material flow pipeline is arranged in the rotating mechanism of the sampling device. The rotating mechanism can drive at least one material flow pipeline to connect the first pipeline with the first purge pipeline or connect the first pipeline with the sampling pipeline. Therefore, the rotating mechanism can drive the rotation of the material flow pipeline, as well as the opening or closing of the first valve, the second valve and the sampling valve, to sample from the fluidized bed reactor A, thereby solving the problems in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0026] Figure 1 A schematic diagram of the specific structure of the sampling device provided in the embodiment of the present application;

[0027] Figure 2 A schematic diagram of the specific structure of the material flow pipeline of the sampling device provided in the embodiment of the present application when it is in the sampling position;

[0028] Figure 3 A schematic diagram of the specific structure of the arrangement of each pipeline in the rotating mechanism of the sampling device provided in an embodiment of the present application;

[0029] Figure 4 A schematic diagram of the specific structure of another sampling device provided in an embodiment of the present application;

[0030] Figure 5 A top view of the internal parts of the rotating mechanism in the sampling device provided in an embodiment of the present application;

[0031] Figure 6 A side view of the internal parts of the rotating mechanism in the sampling device provided in the embodiment of the present application;

[0032] Figure 7 A top view of an outer part of a rotating mechanism in a sampling device provided in an embodiment of the present application;

[0033] Figure 8 A side view of an outer part of a rotating mechanism in a sampling device provided in an embodiment of the present application;

[0034] Fig. 9 A schematic diagram of the specific structure of another sampling device provided in an embodiment of the present application;

[0035] Fig.10 A schematic diagram of a specific process of the sampling method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0037] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0038] As mentioned above, during the catalytic synthesis process, it is usually necessary to sample and analyze the amount of catalyst, reaction raw materials, reaction products, etc. in the fluidized bed reactor, so as to adjust the reaction conditions according to the analysis results.

[0039] For example, in the catalytic synthesis of methylchlorosilane, silicon powder as a reaction raw material and copper powder as a catalyst are usually added to a fluidized bed reactor, so that the silicon powder and copper powder are combined into a silicon-copper complex, which is convenient for subsequent gas-solid reaction with methyl chloride to synthesize methylchlorosilane. Since the copper content in the silicon-copper complex usually affects the reaction rate and selectivity of the subsequent gas-solid reaction, it is often necessary to regularly sample and analyze the silicon-copper complex in the fluidized bed reactor to determine the copper content and guide the adjustment of reaction conditions.

[0040] Based on this, the present application provides a sampling device that can take samples from a fluidized bed reactor, thereby solving the problems in the prior art. Figure 1 As shown, the sampling device 10 includes: a rotating mechanism 11, a first pipeline 12, a first valve 13, a first purge pipeline 14, a second valve 15, a sampling pipeline 16 and a sampling valve 17.

[0041] The first pipe 12 is used to connect the fluidized bed reactor A, so as to guide the sample to be taken out of the fluidized bed reactor. The first valve 13 is arranged on the first pipe 12, and the first pipe 12 can be controlled to be open or closed by opening or closing the first valve 13.

[0042] The first purge pipe 14 is used to introduce a purge gas to purge the pipe, and the purge gas can be a gas with low chemical activity such as nitrogen. The second valve 15 is arranged on the first purge pipe 14, and the opening or closing of the second valve 15 can control the conduction or cutoff of the first purge pipe 14.

[0043] One end of the sampling pipe 16 can be used as a sampling port. The sampling valve 17 is disposed on the sampling pipe 16, and the on / off state of the sampling pipe 16 can be controlled by opening or closing the sampling valve 17.

[0044] At least one material flow pipeline 111 is disposed in the rotating mechanism 11 , wherein the material flow pipeline 111 can be driven to rotate by the rotation of the rotating mechanism 11 , thereby connecting the first pipeline 12 and the first purge pipeline 14 or connecting the first pipeline 12 and the sampling pipeline 16 .

[0045] For the convenience of subsequent description, the position where the material flow pipeline 111 is connected to the first pipeline 12 and the first purge pipe 14 may be referred to as the purge position. Figure 1 The material flow pipe 111 is shown in the purge position; the position where the material flow pipe 111 is connected to the first pipe 12 and the sampling pipe 16 is called the sampling position. Figure 2 The material flow conduit 111 is shown in a sampling position.

[0046] During the rotation of the rotating mechanism 11, in order to enable the material flow pipeline 111 to be used to connect the first pipeline 12 with the first purge pipe 14 and also to connect the first pipeline 12 with the sampling pipeline 16, the distances between the interface of the first pipeline 12 and the rotating mechanism 11, the interface of the first purge pipe 14 and the rotating mechanism 11, and the interface of the sampling pipeline 16 and the rotating mechanism 11 can be set to be equal, so that the length of the material flow pipeline 111 can be used to match the connection between the first pipeline 12 and the first purge pipe 14, and the first pipeline 12 and the sampling pipeline 16 at the same time.

[0047] For example, you can Figure 3 As shown, the first pipeline 12, the first purge pipe 14 and the sampling pipeline 16 are evenly arranged on the circumference of the rotating mechanism 11, so that the distance between each of them is one-third of the circumference; it can also be as shown in FIG. Figure 1 As shown, the first purge pipe 14 and the sampling pipe 16 are arranged at both ends of the circumferential diameter of the rotating mechanism 11, and the first pipe 12 is arranged at the intersection of the perpendicular midline of the diameter and the circumference; of course, the first pipe 12, the first purge pipe 14 and the sampling pipe 16 can also be arranged in other ways on the circumference of the rotating mechanism 11, as long as the distance from the interface of the first pipe 12 and the rotating mechanism 11 to the interface of the first purge pipe 14 and the rotating mechanism 11 is equal to the distance to the interface of the sampling pipe 16 on the rotating mechanism 11.

[0048] The sampling device 10 provided in the embodiment of the present application is adopted. The rotating mechanism 11 in the sampling device 10 is provided with at least one material flow pipeline 111. The rotation of the rotating mechanism 11 can drive at least one material flow pipeline 111 to connect the first pipeline 12 with the first purge pipeline 14 or connect the first pipeline 12 with the sampling pipeline 16. Therefore, the rotation of the material flow pipeline 111 and the opening or closing of the first valve, the second valve and the sampling valve can be driven by the rotating mechanism 11 to sample from the fluidized bed reactor A, thereby solving the problems in the prior art.

[0049] In order to facilitate the purge of the material flow pipe 111 on the rotating mechanism 11, as shown in FIG. Figure 4 As shown, the sampling device 10 may also include a second purge pipe 18 and a third valve 19 disposed on the second purge pipe 18. The second purge pipe 18 is used to introduce a purge gas to purge the pipe, and the purge gas may also be a gas with low chemical activity such as nitrogen. The third valve 19 is disposed on the second purge pipe 18, and the conduction or cutoff of the second purge pipe 18 can be controlled by opening or closing the third valve 19. At this time, the material flow pipe 111 can be rotated to connect the second purge pipe 18 and the sampling pipe 16, so as to purge the pipe.

[0050] When the sampling device 10 further includes the second purge pipe 18, the first pipe 12, the first purge pipe 14, the sampling pipe 16 and the second purge pipe 18 are arranged on the rotating mechanism 11 in a manner that they are evenly arranged circumferentially along the circumference of the rotating mechanism 11, that is, the distance between adjacent interfaces of each interface with the rotating mechanism 11 on the circumference is one quarter of the circumference. In addition, the first pipe 112 and the first purge pipe 14, the first purge pipe 14 and the second purge pipe 18, and the second purge pipe 18 and the sampling pipe 16 are perpendicular to each other at 90°.

[0051] The first pipeline 12, the first purge pipe 14, the sampling pipeline 16 and the second purge pipeline 18 may be pipelines of the same specifications, such as DN25, DN32, etc. The specific specifications are not limited here.

[0052] In addition, if Figure 4 As shown, when the sampling device 10 further includes a second purge pipe 18 , the rotating mechanism 11 may include two symmetrically arranged material flow pipes 111 , and the rotation of the rotating mechanism 11 can drive each material flow pipe 111 to rotate to the purge position or the sampling position.

[0053] Combination Figure 5 Shown is a top view and Figure 6The side view of the rotating mechanism 11 may further include an inner part 112 and a driving device 113, and the material flow pipeline 111 is also arranged on the inner part 112. The driving device 113 is connected to the inner part 112, so that the rotation of the inner part 112 is driven by the rotation of the driving device 113. In practical applications, the driving device 113 may be a rotating device driven by electricity.

[0054] The material flow pipe 111 disposed in the inner part 112 can be disposed inside the inner part 112, for example, the material flow pipe 111 is a flow pipe formed by processing directly inside the inner part 112, and the flow pipe can also be subjected to wear-resistant spraying to prevent damage caused by sample erosion. Of course, the material flow pipe 111 can also be disposed on the surface of the inner part 112, for example, a DN25 pipe is fixed on the surface of the inner part 112 as the material flow pipe 111.

[0055] In addition, combined Figure 7 Shown is a top view and Figure 8 The rotating mechanism 11 may further include an outer member 114 covering the inner member 112, wherein the inner member 112 and the outer member 114 may be combined with the inner wall of the outer member 114 and the outer wall of the inner member 112, or the outer wall of the outer member 114 and the inner wall of the inner member 112. The outer member 114 covers the inner member 112, thereby safely isolating the inner member 112 from the outside to prevent damage to the inner member 112. The sealing contact surface between the inner member 112 and the outer member 114 may be made of metal material or other harder materials, thereby hard sealing the inner member 112 and the outer member 114.

[0056] It should be noted that a plurality of through holes 1141, for example, 4 through holes 1141, are provided on the wall of the joint of the outer member 114 and the inner member 112. The 4 through holes 114 can be used to connect the first pipeline 12, the first purge pipeline 14, the sampling pipeline 16, and the second purge pipeline 18, respectively. The connection between each pipeline nozzle and the through hole can be threaded connection or welding, such as flat welding, etc., which is not limited here.

[0057] The outer part 114 is connected to the inner part 112. When the inner part 112 rotates, it drives the material flow pipeline 111 to rotate, thereby blocking the pipeline until it rotates to the purge position or the sampling position, thereby reconnecting through the material flow pipeline 111.

[0058] The first valve 13, the sampling valve 17, the second valve 15 and the third valve 19 can all be electric valves. For example, the second valve 15 and the third valve 19 are N2 electric valves, and the first valve 13 and the sampling valve 17 are wear-resistant ball valves.

[0059] In addition, the sampling device 10 may also include a purge device and a second purge device, wherein the purge device is connected to the first purge pipe 14, and the second purge device is connected to the second purge pipe 18. Nitrogen or the like is introduced through the purge device or the second purge device to purge the pipe. Figure 1 As shown, when the material flow pipeline 111 is in the purge position, the first valve 13 and the second valve 15 can be opened, and the residue in the pipeline is blown into the fluidized bed reactor A through the purge device to prevent the residue from interfering with subsequent sampling. Since high pressure may exist during the catalytic synthesis process in the fluidized bed reactor A, in order to blow the residue into the fluidized bed reactor A, the pressure provided by the purge device needs to be greater than the pressure in the fluidized bed reactor A. For example, in the synthesis process of methylchlorosilane, the pressure in the fluidized bed reactor A is usually 0.28-0.35MPa, and the pressure provided by the purge device needs to be greater than 0.35MPa, such as 0.7MPa.

[0060] As for the second purge device, since it is not used to blow the residue in the pipeline to the fluidized bed reactor A, the pressure it provides can be less than or equal to that of the purge device, such as 0.3 MPa or 0.7 MPa.

[0061] The above is a specific description of the structure of the sampling device 10 provided in the embodiment of the present application. For ease of understanding, it can be further described below in conjunction with specific examples.

[0062] like Fig. 9 As shown, in this example, the sampling device 10 includes: a rotating mechanism 11, a first pipeline 12 connected to the fluidized bed reactor A, a first valve 13 arranged on the first pipeline, a first purge pipeline 14 connected to the purge device B, a second valve 15 arranged on the first purge pipeline, a second purge pipeline connected to the second purge device C, a third valve 19 arranged on the second purge pipeline 18, a sampling pipeline 16, and a sampling valve 17 arranged on the sampling pipeline, wherein: the first pipeline 12 and the first purge pipeline 14, the first purge pipeline 14 and the second purge pipeline 18, and the second purge pipeline 18 and the sampling pipeline 16 are arranged uniformly along the circumference of the rotating mechanism 11 at 90 degrees to each other, and two material flow pipelines 111 are symmetrically arranged in the rotating mechanism 11. The first valve 13 and the sampling valve 17 are wear-resistant ball valves, and the second valve 15 and the third valve 19 are N2 electric valves.

[0063] In addition, based on the sampling device 10 in this example, the present application embodiment also provides a sampling method. Fig.10 The schematic diagram of the sampling method is shown, including:

[0064] Step S1: driving at least one material flow pipeline to connect the first pipeline and the first purge pipeline by rotating the rotating mechanism.

[0065] for example Fig. 9 In the embodiment, the material flow pipeline is in the purge position, and the first pipeline and the first purge pipeline are connected.

[0066] Step S2: Open the first valve and the second valve to perform purging through the purging device.

[0067] After the first valve and the second valve are opened, the pipeline can be purged by a purge device to purge the residue into the fluidized bed reactor A to prevent the residue from interfering with sampling.

[0068] In addition, regarding the opening sequence of the first valve and the second valve, considering that the pressure provided by the purge device is greater than that of the fluidized bed reactor A, the first valve may be opened first, and then the second valve.

[0069] Step S3: After the purging is completed by the purging device, the first valve and the second valve are closed.

[0070] Usually, after a period of time, such as 2 seconds or other time, most of the residues are blown into the fluidized bed reactor A by the purge device, and it can be considered that the purge has been completed, and the first valve and the second valve can be closed. Usually, the second valve can be closed first, and then the first valve.

[0071] Step S4: Rotate the rotating mechanism 90° to rotate the purged material flow pipeline to connect the first pipeline and the sampling pipeline.

[0072] Regarding the direction of rotation of the rotating mechanism, when the first pipeline 12, the first purge pipeline 14, the second purge pipeline 18 and the sampling pipeline 16 are as follows: Fig. 9 As shown, when set clockwise in sequence, step S4 is to rotate the rotating mechanism counterclockwise by 90°, thereby rotating the purged material flow pipeline to the sampling position.

[0073] When the first pipeline 12, the first purge pipeline 14, the second purge pipeline 18 and the sampling pipeline 16 are sequentially arranged counterclockwise, step S4 is to rotate the rotating mechanism 90° clockwise, thereby rotating the purged material flow pipeline to the sampling position.

[0074] Step S5: Sampling is performed by controlling the first valve and the sampling valve.

[0075] For example, the sampling valve can be opened first to relieve the pressure inside the pipeline. When the pressure relief is completed, the sampling valve is closed. Usually, when the sampling valve is opened for a period of time, such as 10 seconds or other time, the pressure relief can be considered complete.

[0076] After closing the sampling valve, the first valve can be opened to use the pressure of the fluidized bed reactor A itself to blow the sample into the material flow pipeline. After a period of time, such as 10 seconds or other time, the first valve is closed and then the sampling valve is opened again for sampling.

[0077] By controlling the first valve and the sampling valve to perform sampling in this manner, it is prevented that the first valve and the sampling valve are in an open state at the same time, which would cause the substances in the fluidized bed reactor A to be ejected due to high pressure, thus causing danger.

[0078] After sampling is completed, for example, after the sampling valve is opened again to sample for 30 seconds, the sampling valve can be closed. Then, the rotating mechanism is rotated 90° in the same rotation direction, so that the material flow pipeline after sampling is rotated to connect the sampling pipeline and the second purge pipeline. Then, the sampling valve and the third valve are opened to purge the material flow pipeline after sampling, and after a period of purge, for example, 3 seconds, the sampling valve and the third valve are closed.

[0079] In addition, after the rotating mechanism is rotated 90 degrees in the same rotation direction, another material flow pipeline is connected to the first pipeline and the sampling pipeline. At this time, the first valve can be opened again, and then the second valve is opened, and the other material flow pipeline is purged by the purge device, and the purge time can be 2 seconds or other time.

[0080] The sampling method provided in the embodiment of the present application can also solve the problems in the prior art because it is based on the sampling device provided in the embodiment of the present application, which will not be described in detail here. In addition, for the sampling method, the hardware equipment or software in practical applications can be solved, and the other technical effects obtained are also within the protection scope of the present application. For example, the sampling method can be implemented by controlling the sampling device through DCS control system programming, so as to perform sampling. For the software product obtained by the programming, it can automatically implement the sampling method by controlling the sampling device, which should also be within the protection scope of the present application.

[0081] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0082] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0083] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A sampling device for sampling and analyzing a silicon-copper combination in a fluidized bed reactor, characterized in that: include: A rotating mechanism, a first pipeline for connecting a fluidized bed reactor, a first valve disposed on the first pipeline, a first purge pipeline, a second valve disposed on the first purge pipeline, a sampling pipeline and a sampling valve disposed on the sampling pipeline, a second purge pipeline and a third valve disposed on the second purge pipeline, wherein: Two material flow pipes are symmetrically arranged in the rotating mechanism, and each of the material flow pipes can be driven to rotate to a purge position or a sampling position by the rotation of the rotating mechanism; The rotating mechanism comprises an inner part, an outer part and a driving device connected to the inner part, each of the material flow pipelines is arranged inside the inner part, and the outer part covers the inner part.

2. The sampling device according to claim 1, characterized in that The first pipe and the first purge pipe, the first purge pipe and the second purge pipe, and the second purge pipe and the sampling pipe are arranged at 90 degrees to each other along the circumferential direction of the rotating mechanism.

3. The sampling device according to claim 1, characterized in that: The first pipeline, the first purge pipeline, the second purge pipeline and the second purge pipeline are evenly arranged along the circumference of the rotating mechanism.

4. The sampling device according to claim 1, characterized in that: The first valve, the sampling valve, the second valve and the third valve are all electric valves.

5. The sampling device according to claim 1, characterized in that: One end of the first purge pipeline is connected to a purge device; and, One end of the second purge pipeline is connected to a second purge device.

6. A sampling method, characterized in that: The sampling device comprises: a rotating mechanism, a first pipeline connected to a fluidized bed reactor, a first valve arranged on the first pipeline, a first purge pipeline connected to a purge device, a second valve arranged on the first purge pipeline, a second purge pipeline connected to a second purge device, a third valve arranged on the second purge pipeline, a sampling pipeline and a sampling valve arranged on the sampling pipeline, wherein: the first pipeline and the first purge pipeline, the first purge pipeline and the second purge pipeline, and the second purge pipeline and the sampling pipeline are uniformly arranged at 90 degrees to each other along the circumference of the rotating mechanism; and two material flow pipelines are symmetrically arranged in the rotating mechanism; the method comprises: By rotating the rotating mechanism, at least one material flow pipe is driven to connect the first pipe with the first purge pipe; Opening the first valve and the second valve to perform purging through the purging device; closing the first valve and the second valve; Rotate the rotating mechanism 90° to rotate the purged material flow pipeline to connect the first pipeline and the sampling pipeline; and Sampling is performed by controlling the first valve and the sampling valve.

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