A control system and method for parallel sampling in petrochemical industry using carbon fiber composite materials

Abstract

The present invention belongs to the technical field of parallel sampling control in the petrochemical production process, and proposes a control system and method for parallel sampling of carbon fiber composite materials in petrochemical industry. The main solution is as follows: Set corresponding parallel sampling control strategies for the processes of current produced finished products through the main controller unit; Set slave controller units adapted to the processes of produced finished products, obtain the parallel sampling control strategies corresponding to the processes of current produced finished products and notify the parallel sampling unit; The parallel sampling unit performs parallel sampling on the finished products produced by the current process based on the parallel sampling control strategy; Monitor the sampling results of parallel sampling, generate monitoring result information and send it to the corresponding slave controller; The slave controller unit judges whether the finished products produced by the current process are qualified based on the comparison result between the monitoring result information and the standard monitoring result information, and notifies the main controller unit of the finished product judgment result; Obtain the finished product judgment results of each slave controller unit.

Description

Technical Field

[0001] The present invention relates to the technical field of parallel sampling control in a petrochemical production process, and in particular to a control system and method for parallel sampling of carbon fiber composite material petrochemicals. Background Art

[0002] Currently, petrochemical production processes primarily include organic chemical production, polymer chemical production, and fine chemical production. While some of these processes require only a single finished product, many may produce multiple products. For example, polymer chemical production involves the production of organic raw materials through various polymerization and condensation steps to produce synthetic fibers, synthetic resins, synthetic rubber, and other finished products. These finished products must undergo sampling and verification before they can be mass-produced.

[0003] Based on the above situation, the current sampling method mostly adopts manual sampling using sampling bottles and then conducting experimental analysis. Due to the risk of toxic gas leakage and inconvenience of sampling at many sampling sites, more and more intelligent robots are used to place and remove sampling bottles. For the sampled samples, corresponding intelligent analytical instruments are also used to analyze whether the sampled samples are qualified according to the composition of the finished product.

[0004] Since the performance and composition of the finished products produced in different processes may be inconsistent, different intelligent analytical instruments are needed to achieve this. However, no matter which intelligent analytical instrument is used, its sampling point is relatively fixed, and the intelligent analytical instrument itself has systematic errors, making it more dependent on the precision of the corresponding intelligent analytical instrument when judging whether the sample is qualified.

[0005] Therefore, how to more accurately judge whether the finished products produced in different petrochemical production processes are qualified is a technical problem that needs to be solved urgently. Summary of the Invention

[0006] The purpose of the present invention is to provide a control system and method for parallel sampling of carbon fiber composite materials in petrochemical industry, which can set corresponding parallel sampling control strategies according to the product performance of finished products produced in different processes, so as to improve the accuracy of sampling results in the petrochemical sampling process.

[0007] The present invention solves the technical problem and adopts the following technical solution:

[0008] In one aspect, the present invention provides a control system for parallel sampling of carbon fiber composite materials in petrochemical industry, comprising:

[0009] A process acquisition unit, configured to acquire the processes for producing finished products in petrochemical production;

[0010] A main controller unit, which stores a finished product performance list corresponding to the processes for producing the finished products, and is configured to match the corresponding finished product performance from the finished product performance list based on the current process for producing the finished products, and set a corresponding parallel sampling control strategy for the current process for producing the finished products based on the matched finished product performance, and is configured to acquire the finished product judgment results of each slave controller unit;

[0011] Slave controller units, which are adaptively set for the processes for producing the finished products and store standard monitoring result information, and are configured to acquire the parallel sampling control strategy corresponding to the current process for producing the finished products from the main controller unit, notify the parallel sampling unit, and are configured to judge whether the finished products produced in the current process are qualified based on the comparison result between the monitoring result information and the standard monitoring result information, and notify the main controller unit of the finished product judgment results;

[0012] A parallel sampling unit, which is made of carbon fiber composite materials, and is configured to perform parallel sampling on the finished products produced in the current process based on the parallel sampling control strategy in the slave controller unit after receiving the parallel sampling notification from the slave controller unit;

[0013] A sampling and monitoring unit, configured to monitor the sampling results of the parallel sampling, generate monitoring result information and send it to the corresponding slave controller.

[0014] As a further optimization, after acquiring the processes for producing the finished products in petrochemical production through the process acquisition unit, it is judged whether the finished products produced in the current process are used as raw materials for the processes of the next produced finished products. If so, the current process is marked and the main controller unit is notified; otherwise, the main controller unit is directly notified.

[0015] As a further optimization, when the main controller unit receives the notification of the process for producing the finished products with a mark, it stores the corresponding finished product performance in the form of a first finished product performance list;

[0016] When the main controller unit receives the notification of the process for the finished products without a mark, it stores the corresponding finished product performance in the form of a second finished product performance list.

[0017] As a further optimization, the main controller unit matching the corresponding finished product performance from the finished product performance list based on the current process for producing the finished products means that:

[0018] If the current process has a mark, the main controller unit matches the corresponding finished product performance from the first finished product performance list;

[0019] If the current process has no label, the main controller unit matches the corresponding finished product performance from the second finished product performance list.

[0020] As a further optimization, if the matched finished product performance comes from the first finished product performance list, the main controller unit sets a corresponding parallel sampling control strategy for the process that produces the current finished product, which means:

[0021] Set the first number of sampling points for the process that produces the current finished product, and set the position information of each sampling point, the sampling volume information of the sampling bottles in each sampling point, and the sampling timing information of each sampling point;

[0022] If the matched finished product performance comes from the second finished product performance list, the main controller unit sets a corresponding parallel sampling control strategy for the process that produces the current finished product, which means:

[0023] Set the second number of sampling points for the process that produces the current finished product, and set the position information of each sampling point, the sampling volume information of the sampling bottles in each sampling point, and the sampling timing information of each sampling point.

[0024] As a further optimization, the parallel sampling unit includes sealed sampling bottles, sampling valves, first pipelines, and second pipelines set at each sampling point. The first pipeline is set between the main pipeline of the current process and the sampling valve, and the second pipeline is set between the sampling valve and the sealed sampling bottle;

[0025] The sealed sampling bottles, sampling valves, first pipelines, and second pipelines are all composite materials with carbon fiber wrapped on the outside and polytetrafluoroethylene as the inner liner.

[0026] As a further optimization, if the finished product produced by the current process is a gas, the sampling and monitoring unit is an infrared gas analyzer; if the finished product produced by the current process is a liquid, the sampling and monitoring unit is an image sensor; if the finished product produced by the current process is a fluid, the sampling and monitoring unit includes an infrared gas analyzer and an image sensor.

[0027] As a further optimization, if the current process has a label, the adaptation setting of the slave controller unit to the process that produces the finished product means:

[0028] The slave controller unit includes a first slave controller unit and a second slave controller unit, and the first standard monitoring result information is stored in both the first slave controller unit and the second slave controller unit;

[0029] If the current process has no label, the adaptation setting of the slave controller unit to the process that produces the finished product means:

[0030] The slave controller unit is a third slave controller unit, and the second standard monitoring result information is stored in the third controller unit.

[0031] As a further optimization, the controller unit determines whether the finished product produced in the current process is qualified based on the comparison result between the monitoring result information and the standard monitoring result information, and notifies the main controller unit of the finished product judgment result, which means:

[0032] If the current process has a mark, the first monitoring result information is obtained through the first slave controller unit and the second slave controller unit respectively, and compared with the first standard monitoring result information respectively. If the comparison results are all within the first preset error range, it means that the finished product produced in the current process is qualified, and the finished product judgment result is directly sent to the main controller unit. Otherwise, it means that the finished product produced in the current process is unqualified, and the finished product judgment results are sent to the main controller unit and the sampling warning prompt terminal respectively;

[0033] If the current process has no mark, the second monitoring result information is obtained through the third controller unit and compared with the second standard monitoring result information. If the comparison result is within the second preset error range, it means that the finished product produced in the current process is qualified, and the finished product judgment result is directly sent to the main controller unit. Otherwise, it means that the finished product produced in the current process is unqualified, and the finished product judgment results are sent to the main controller unit and the sampling warning prompt terminal respectively.

[0034] On the other hand, the present invention also provides a control method for parallel sampling of carbon fiber composite materials in petrochemical industry, which is applied to the control system for parallel sampling of carbon fiber composite materials in petrochemical industry, and includes the following steps:

[0035] Obtain the process of producing the finished product in the petrochemical production process, and store the finished product performance list corresponding to the process of producing the finished product through the main controller unit;

[0036] Based on the process of currently producing the finished product, the main controller unit matches the corresponding finished product performance from the finished product performance list, and sets the corresponding parallel sampling control strategy for the process of currently producing the finished product based on the matched finished product performance;

[0037] The slave controller unit is adaptively set for the process of producing the finished product, and the standard monitoring result information is stored. The parallel sampling control strategy corresponding to the process of currently producing the finished product is obtained from the main controller unit and notified to the parallel sampling unit;

[0038] The parallel sampling unit is made of carbon fiber composite materials. After receiving the parallel sampling notification from the slave controller unit, the parallel sampling unit performs parallel sampling on the finished product produced in the current process based on the parallel sampling control strategy in the slave controller unit;

[0039] Monitor the sampling result of the parallel sampling, generate the monitoring result information and send it to the corresponding slave controller;

[0040] The slave controller unit determines whether the finished product produced in the current process is qualified based on the comparison result between the monitoring result information and the standard monitoring result information, and notifies the main controller unit of the finished product judgment result;

[0041] Obtain the finished product judgment results of each slave controller unit.

[0042] The beneficial effects of the present invention are as follows: Through the above control system and method for parallel sampling of carbon fiber composite materials in petrochemical industry, on the one hand, for different processes in the petrochemical production process, the present invention uses parallel sampling and verification through monitoring results, avoiding systematic errors caused by over-reliance on intelligent analysis instruments due to sampling and verification at a single sampling point. On the other hand, the present invention can use different parallel sampling control strategies based on the finished product performance of the finished products produced under different processes, rather than using a single sampling point sampling and verification strategy, thereby further improving the accuracy of the sampling verification results. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the composition structure of a control system for parallel sampling of carbon fiber composite materials in petrochemical industry in Embodiment 1 of the present invention;

[0044] Figure 2 It is a schematic diagram of the processes involved in the petrochemical production process in Embodiment 1 of the present invention;

[0045] Figure 3 It is a schematic diagram of different sampling bottles set for different finished product performances in Process 2 in Embodiment 1 of the present invention;

[0046] Figure 4 It is a flowchart of a control method for parallel sampling of carbon fiber composite materials in petrochemical industry in Embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0048] Embodiment 1

[0049] What this embodiment provides is a control system for parallel sampling of carbon fiber composite materials in petrochemical industry, and its composition structure schematic diagram is shown in Figure 1 , where the system includes:

[0050] A process acquisition unit for acquiring the processes of finished products produced in the petrochemical production process;

[0051] A main controller unit that stores a finished product performance list corresponding to the processes of the produced finished products, and is used to match the corresponding finished product performance from the finished product performance list based on the current process of the produced finished product, and set a corresponding parallel sampling control strategy for the current process of the produced finished product based on the matched finished product performance, and is used to obtain the finished product judgment results of each slave controller unit;

[0052] A slave controller unit, which is adaptively set with the process of the produced finished product and stores standard monitoring result information, and is used to obtain the parallel sampling control strategy corresponding to the current process of the produced finished product from the main controller unit, notify the parallel sampling unit, and is used to judge whether the finished product produced in the current process is qualified based on the comparison result between the monitoring result information and the standard monitoring result information, and notify the main controller unit of the finished product judgment result;

[0053] A parallel sampling unit made of carbon fiber composite material, which is used to perform parallel sampling on the finished product produced in the current process based on the parallel sampling control strategy in the slave controller unit after receiving the parallel sampling notification from the slave controller unit;

[0054] A sampling monitoring unit for monitoring the sampling results of parallel sampling, generating monitoring result information and sending it to the corresponding slave controller.

[0055] See Figure 2 , in this embodiment, assuming that the processes involved in the petrochemical production process include Process 1 - Process n, since the properties of the finished products produced under some processes are different, such as Process 2, the types of finished products produced by Process 2 and Process 1 are different. Therefore, in this embodiment, different parallel sampling control strategies need to be set for Process 1 and Process 2 to improve the accuracy of the sampling verification results.

[0056] In some cases, the performance of the finished product produced in the current process is single. In other cases, some of the finished products produced by a process need to be used as raw materials for the finished products produced in the next process. In this case, at this time, there is an association between the current process and the next process. Therefore, for the above different situations, the main controller unit can classify and store different parallel sampling results, and give timely warnings for different parallel sampling monitoring results. Therefore, in this embodiment, after the process acquisition unit acquires the processes of the finished products produced in the petrochemical production process, it is necessary to judge whether the finished product produced in the current process is used as the raw material for the process of the next produced finished product. If so, mark the current process and notify the main controller unit, otherwise directly notify the main controller unit.

[0057] In addition, since the number of processes with marks and those without marks is not uniform, and the performance of the finished products produced under the same process is also different. Therefore, in order to classify and store the above two types of processes for subsequent accurate determination of different parallel sampling control strategies, thereby improving the accuracy of the sampling verification results of all processes. In this embodiment, when the main controller unit receives a process notification of a finished product with a mark, the performance of the finished product corresponding to this process is stored in the form of a first finished product performance list;

[0058] When the main controller unit receives a process notification of a finished product without a mark, the performance of the finished product corresponding to this process is stored in the form of a second finished product performance list.

[0059] Correspondingly, in this embodiment, the main controller unit matching the corresponding finished product performance from the finished product performance list based on the current process of the produced finished product may mean:

[0060] If the current process has a mark, the main controller unit matches the corresponding finished product performance from the first finished product performance list;

[0061] If the current process has no mark, the main controller unit matches the corresponding finished product performance from the second finished product performance list.

[0062] Here, for the process with a mark, since the current process needs to use the finished product of the previous process as raw material, making the composition of the finished product produced by the current process more complex. Therefore, more sampling points need to be set, and its parallel sampling control strategy should pay more attention to the number of sampling points, the position of the sampling points, the sampling volume of the sampling bottles in each sampling point, and the sampling timing of each sampling point to ensure the accuracy of the parallel sampling results. Therefore, in this embodiment, if the matched finished product performance comes from the first finished product performance list, the main controller unit setting the corresponding parallel sampling control strategy for the process of the currently produced finished product may mean:

[0063] Setting a first number of sampling points for the process of the currently produced finished product, and setting the position information of each sampling point, the sampling volume information of the sampling bottles in each sampling point, and the sampling timing information of each sampling point;

[0064] If the matched finished product performance comes from the second finished product performance list, the main controller unit setting the corresponding parallel sampling control strategy for the process of the currently produced finished product means:

[0065] Setting a second number of sampling points for the process of the currently produced finished product, and setting the position information of each sampling point, the sampling volume information of the sampling bottles in each sampling point, and the sampling timing information of each sampling point.

[0066] It should be noted that in this embodiment, for the processes with markings, it means that the components of the produced finished products are more. Therefore, in order to ensure the accuracy of subsequent parallel sampling, the first quantity needs to be greater than the second quantity. Refer to Figure 3 , taking Process 2 as an example, a finished product has two sampling points. Correspondingly, it includes two sampling bottles, namely a1 and a2. Another finished product has three sampling points. Correspondingly, it includes three sampling bottles, namely b1, b2, and b3. In addition, the position information of the sampling points can be freely set based on the specific sampling bottle access pipeline. For example, if it is a traditional annular pipeline and the number of sampling points is two, then, in order to ensure the accuracy of the parallel sampling results, the positions of the sampling points can be set at two diametrically opposite points on the ring. If the number of sampling points is three, then the annular pipeline can be divided into three equal parts, and sampling points can be set at the positions of the three equal division points respectively. For the sampling timing of the sampling points, it only applies to the case where there are multiple sampling points. In this case, the sampling timing can be set based on the amount of the sampling volume set for each sampling point. In order to improve the parallel sampling efficiency, the sampling point with a larger sampling volume should have an earlier sampling timing.

[0067] In the actual application process, since the finished products produced by the process may be gases, may be liquids, or may be gas-liquid mixtures (i.e., fluids), regardless of the state of the produced finished products, most of them are toxic and corrosive. Therefore, it is necessary to ensure the tightness of sampling. Therefore, in this embodiment, carbon fiber composite materials can be used to improve corrosion resistance. At the same time, during the parallel sampling process, since it is necessary to control the sampling volume, corresponding valve bodies also need to be set. Therefore, in this embodiment, the parallel sampling unit may include airtight sampling bottles, sampling valves, first pipelines, and second pipelines set at each sampling point. Specifically, the first pipeline is set between the main pipeline of the current process and the sampling valve and is used to connect the sampled finished products. The second pipeline is set between the sampling valve and the airtight sampling bottle and is used to control the amount of the sampling volume. The airtight sampling bottles, sampling valves, first pipelines, and second pipelines can all be composite materials with carbon fiber wrapped on the outside and polytetrafluoroethylene as the inner liner to ensure the tightness and corrosion resistance of the sampling process.

[0068] It should be noted that if the finished product produced by the current process is a gas, the sampling and monitoring unit can be an infrared gas analyzer. At this time, the gas components can be analyzed by the infrared gas analyzer to obtain accurate monitoring results. If the finished product produced by the current process is a liquid, the sampling and monitoring unit can be an image sensor. At this time, the height information of the liquid in the sampling bottle can be obtained through the image sensor, and then combined with the volume of the sampling bottle to accurately obtain the monitoring results. If the finished product produced by the current process is a fluid, the sampling and monitoring unit can include an infrared gas analyzer and an image sensor to ensure the accuracy of the monitoring results.

[0069] It should be noted that for the processes with marking and without marking, since the produced finished products are different and the properties of the produced finished products are different, in order to more accurately determine the sampling monitoring results, different standard monitoring result information needs to be set, and then combined with the corresponding monitoring result information, and after comparison, it is judged whether the finished products produced by the corresponding processes are qualified. Therefore, in this embodiment, if the current process has a marking, the adaptation setting of the slave controller unit to the process of the produced finished product may refer to:

[0070] The slave controller unit includes a first slave controller unit and a second slave controller unit, and the first standard monitoring result information is stored in both the first slave controller unit and the second slave controller unit;

[0071] If the current process has no marking, the adaptation setting of the slave controller unit to the process of the produced finished product may refer to:

[0072] The slave controller unit is a third slave controller unit, and the second standard monitoring result information is stored in the third controller unit.

[0073] Correspondingly, the controller unit judges whether the finished product produced by the current process is qualified based on the comparison result between the monitoring result information and the standard monitoring result information, and notifies the main controller unit of the finished product judgment result, which may refer to:

[0074] If the current process has a marking, the first monitoring result information is obtained through the first slave controller unit and the second slave controller unit respectively, and is compared with the first standard monitoring result information respectively. If the comparison results are all within the first preset error range, it means that the finished product produced by the current process is qualified, and the finished product judgment result is directly sent to the main controller unit; otherwise, it means that the finished product produced by the current process is unqualified, and the finished product judgment results are sent to the main controller unit and the sampling warning prompt terminal respectively;

[0075] If the current process has no marking, the second monitoring result information is obtained through the third controller unit and is compared with the second standard monitoring result information. If the comparison result is within the second preset error range, it means that the finished product produced by the current process is qualified, and the finished product judgment result is directly sent to the main controller unit; otherwise, it means that the finished product produced by the current process is unqualified, and the finished product judgment results are sent to the main controller unit and the sampling warning prompt terminal respectively.

[0076] Embodiment 2

[0077] On the basis of Embodiment 1, this embodiment provides a control method for parallel sampling of carbon fiber composite materials in petrochemical industry, and the flow chart thereof is shown in Figure 4 Among them, the method includes the following steps:

[0078] S1. Obtain the process of producing finished products in the petrochemical production process, and store the finished product performance list corresponding to the process of producing the finished products through the main controller unit;

[0079] S2. Based on the current process of producing finished products through the main controller unit, match the corresponding finished product performance from the finished product performance list, and set the corresponding parallel sampling control strategy for the process of producing the current finished product based on the matched finished product performance;

[0080] S3. Set the slave controller unit adaptively to the process of producing finished products, store the standard monitoring result information, obtain the parallel sampling control strategy corresponding to the current process of producing finished products from the main controller unit, and notify the parallel sampling unit;

[0081] S4. Make the parallel sampling unit from carbon fiber composite materials. After the parallel sampling unit receives the parallel sampling notification from the slave controller unit, based on the parallel sampling control strategy in the slave controller unit, perform parallel sampling on the finished products produced by the current process;

[0082] S5. Monitor the sampling results of the parallel sampling, generate the monitoring result information and send it to the corresponding slave controller;

[0083] S6. The slave controller unit determines whether the finished products produced by the current process are qualified based on the comparison result between the monitoring result information and the standard monitoring result information, and notifies the main controller unit of the finished product judgment result;

[0084] S7. Obtain the finished product judgment results of each slave controller unit.

[0085] Based on the description of Embodiment 1, it can be seen that the application scenario and implementation principle of this embodiment are the same as those of Embodiment 1, so they will not be elaborated here.

[0086] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A control system for parallel sampling in petrochemical industry using carbon fiber composite materials, characterized in that, Including: A process acquisition unit, which is used to acquire the process of producing finished products in the petrochemical production process. After acquiring the process of producing finished products in the petrochemical production process through the process acquisition unit, it judges whether the finished product produced in the current process is used as the raw material for the next process of producing finished products. If so, it marks the current process and notifies the main controller unit; otherwise, it directly notifies the main controller unit. The main controller unit stores a finished product performance list corresponding to the process of producing finished products, and is used to match the corresponding finished product performance from the finished product performance list based on the current process of producing finished products, and set the corresponding parallel sampling control strategy for the current process of producing finished products based on the matched finished product performance, and is used to obtain the finished product judgment results of each slave controller unit. When the main controller unit receives a notification of the process of producing finished products with a mark, it stores the finished product performance corresponding to this process in the form of a first finished product performance list. When the main controller unit receives a notification of the process of producing finished products without a mark, it stores the finished product performance corresponding to this process in the form of a second finished product performance list. The slave controller unit is adaptively set with the process of producing finished products and stores standard monitoring result information. It is used to obtain the corresponding parallel sampling control strategy for the current process of producing finished products from the main controller unit, notify the parallel sampling unit, and is used to judge whether the finished product produced in the current process is qualified based on the comparison result between the monitoring result information and the standard monitoring result information, and notify the main controller unit of the finished product judgment result. The parallel sampling unit is made of carbon fiber composite material and is used to perform parallel sampling on the finished product produced in the current process based on the parallel sampling control strategy in the slave controller unit after receiving the parallel sampling notification from the slave controller unit. The sampling monitoring unit is used to monitor the sampling results of parallel sampling, generate monitoring result information and send it to the corresponding slave controller.

2. The control system for parallel sampling of carbon fiber composite materials in petrochemical industry according to claim 1, characterized in that, The main controller unit matches the corresponding finished product performance from the finished product performance list based on the current process of producing finished products, which means: If the current process has a mark, the main controller unit matches the corresponding finished product performance from the first finished product performance list. If the current process has no mark, the main controller unit matches the corresponding finished product performance from the second finished product performance list.

3. The control system for parallel sampling of carbon fiber composite materials in petrochemical industry according to claim 1, wherein, If the matched finished product performance comes from the first finished product performance list, the main controller unit sets the corresponding parallel sampling control strategy for the current process of producing finished products, which means: Set the first number of sampling points for the current process of producing finished products, and set the position information of each sampling point, the sampling volume information of the sampling bottle in each sampling point, and the sampling time sequence information of each sampling point. If the matched finished product performance comes from the second finished product performance list, the main controller unit sets the corresponding parallel sampling control strategy for the current process of producing finished products, which means: Set the second number of sampling points for the current process of producing finished products, and set the position information of each sampling point, the sampling volume information of the sampling bottle in each sampling point, and the sampling time sequence information of each sampling point.

4. The control system for parallel sampling of carbon fiber composite materials in petrochemical industry according to claim 3, characterized in that, The parallel sampling unit includes sealed sampling bottles, sampling valves, first pipelines, and second pipelines provided at each sampling point. The first pipeline is provided between the main pipeline of the current process and the sampling valve, and the second pipeline is provided between the sampling valve and the sealed sampling bottle; The sealed sampling bottle, sampling valve, first pipeline, and second pipeline are all composite materials with carbon fiber wrapped on the outside and polytetrafluoroethylene as the inner liner.

5. The control system for parallel sampling of carbon fiber composite materials in petrochemical industry according to claim 1, wherein If the finished product produced in the current process is a gas, the sampling and monitoring unit is an infrared gas analyzer. If the finished product produced in the current process is a liquid, the sampling and monitoring unit is an image sensor. If the finished product produced in the current process is both a gas and a liquid, the sampling and monitoring unit includes an infrared gas analyzer and an image sensor.

6. The control system for parallel sampling of carbon fiber composite materials in petrochemical industry according to claim 1, wherein, If the current process has a mark, the adaptation setting of the slave controller unit to the process of the produced finished product means: The slave controller unit includes a first slave controller unit and a second slave controller unit, and first standard monitoring result information is stored in both the first slave controller unit and the second slave controller unit; If the current process has no mark, the adaptation setting of the slave controller unit to the process of the produced finished product means: The slave controller unit is a third slave controller unit, and second standard monitoring result information is stored in the third slave controller unit.

7. The control system for parallel sampling of carbon fiber composite materials in petrochemical industry according to claim 6, characterized in that, The controller unit determines whether the finished product produced in the current process is qualified based on the comparison result between the monitoring result information and the standard monitoring result information, and notifies the main controller unit of the finished product judgment result, which means: If the current process has a mark, the first monitoring result information is obtained through the first slave controller unit and the second slave controller unit respectively, and compared with the first standard monitoring result information respectively. If the comparison results are all within the first preset error range, it means that the finished product produced in the current process is qualified, and the finished product judgment result is directly sent to the main controller unit. Otherwise, it means that the finished product produced in the current process is unqualified, and the finished product judgment results are sent to the main controller unit and the sampling warning prompt terminal respectively; If the current process has no mark, the second monitoring result information is obtained through the third controller unit and compared with the second standard monitoring result information. If the comparison result is within the second preset error range, it means that the finished product produced in the current process is qualified, and the finished product judgment result is directly sent to the main controller unit. Otherwise, it means that the finished product produced in the current process is unqualified, and the finished product judgment results are sent to the main controller unit and the sampling warning prompt terminal respectively.

8. A control method for parallel sampling in petrochemical industry of carbon fiber composite materials, which is applied to the control system for parallel sampling in petrochemical industry of carbon fiber composite materials described in any one of claims 1-7, characterized in that, It includes the following steps: Obtain the process of the produced finished product in the petrochemical production process, and store the finished product performance list corresponding to the process of the produced finished product through the main controller unit; After obtaining the process of the produced finished product in the petrochemical production process through the process obtaining unit, judge whether the finished product produced in the current process is used as the raw material for the next process of the produced finished product. If so, mark the current process and notify the main controller unit. Otherwise, directly notify the main controller unit; The main controller unit matches the corresponding finished product performance from the finished product performance list based on the process of the currently produced finished product, and sets the corresponding parallel sampling control strategy for the process of the currently produced finished product based on the matched finished product performance. When the main controller unit receives the process notification of the produced finished product with a mark, it stores the finished product performance corresponding to this process in the form of a first finished product performance list. When the main controller unit receives the process notification of the finished product without a mark, it stores the finished product performance corresponding to this process in the form of a second finished product performance list; The slave controller unit is adaptively set according to the process of the produced finished product, stores the standard monitoring result information, obtains the parallel sampling control strategy corresponding to the process of the currently produced finished product from the main controller unit, and notifies the parallel sampling unit; The parallel sampling unit is made of carbon fiber composite material. After receiving the parallel sampling notification from the slave controller unit, it performs parallel sampling on the finished product produced by the current process based on the parallel sampling control strategy in the slave controller unit; Monitor the sampling results of the parallel sampling, generate the monitoring result information and send it to the corresponding slave controller; The slave controller unit determines whether the finished product produced by the current process is qualified based on the comparison result between the monitoring result information and the standard monitoring result information, and notifies the main controller unit of the finished product judgment result; Obtain the finished product judgment results of each slave controller unit.

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