A fully automatic hanging bottle type online sampling device for reactor

Abstract

The present invention relates to the field of sampling detection technology, and in particular to a fully automatic hanging bottle type online sampling device for a reactor. The present invention is provided with a sampling hanging bottle, a sampling box, a pre-sampling unit, an information monitoring unit, an online analysis unit, and a sampling execution unit. Sampling is performed through the sampling hanging bottle, and pre-sampling action is performed through the pre-sampling unit. The force value of the sampling hanging bottle in the sinking process in the reactant is obtained through the information monitoring unit, and a real-time force value curve is drawn. The online analysis unit is used to determine whether there is a local enrichment phenomenon in the reactant, and the sampling position of the sampling hanging bottle for sampling is determined. The sampling execution unit controls a lifting motor to drive the sampling hanging bottle to sink to the sampling position for sampling and adjusts the static time of the sampling hanging bottle at the sampling position. Furthermore, the sampling position of the closed sampling is adaptively adjusted according to the component distribution state of the reactant in the reactor, and the representativeness of the sample data of the sampling detection is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sampling and detection, and in particular to a full-automatic hanging bottle type online sampling device for a reaction kettle. Background Art

[0002] In many industrial fields such as chemical, pharmaceutical, and food, reactors are key equipment for chemical reactions, material mixing, and preparation. In order to ensure the normal progress of the reaction process and that the quality of the final product meets the requirements, real-time and accurate sampling and analysis of the materials in the reactor is crucial. Traditional reactor sampling methods mainly rely on manual operation. Operators need to wear protective equipment at specific time points, manually open the sampling port of the reactor, and use sampling tools to collect samples deep inside the reactor. However, this sampling method has many disadvantages. The reactor is often in a high temperature, high pressure, toxic or flammable and explosive environment. When manually sampling, operators are directly exposed to these dangerous conditions, which can easily cause serious safety accidents.

[0003] At the same time, manual sampling is difficult to ensure the consistency and accuracy of each sampling. Factors such as operator proficiency, position deviation during sampling, uncertainty in sampling depth, and instability in sampling speed will cause the samples taken to fail to truly reflect the overall characteristics of the materials in the reactor, thereby affecting the subsequent process adjustments and quality control decisions made based on the sample analysis results. Therefore, providing a fully automatic online sampling device for reactors to provide strong support for the accurate monitoring of the reaction process and the stable improvement of product quality is a technical problem that needs to be solved urgently.

[0004] For example, Chinese Patent Publication No.: CN118190519A, the invention discloses an automatic sampling system for a reactor, including a circulating sampling unit for automatic sampling, and a nitrogen purge unit for purging the pipeline of the circulating sampling unit; the circulating sampling unit includes a suction device, a sampling device and a discharge device which are sequentially connected through a pipeline, and the sampling device is detachably connected to the suction device and the discharge device through a quick-release connector assembly; the invention ensures that the characteristics of the liquid in the sampling system and the liquid in the reactor are consistent by setting a temperature control assembly and a nitrogen purge unit, and controls two three-way valves through a single valve stem, which reduces pipeline joints and simplifies the valve body switching steps. It not only has a simple structure, simple operation, and reasonable settings, but also makes the sampling more realistic, safe and reliable.

[0005] The prior art still has the following problems:

[0006] The existing technology does not take into account the density stratification phenomenon that may occur in the reactor due to chemical changes in the reactants. The density stratification phenomenon will make it difficult to obtain the accurate state of the reactants in the reactor by sampling and testing at a fixed sampling position. The existing technology cannot adaptively adjust the sampling position of the closed sampling according to the component distribution state of the reactants in the reactor, which affects the representativeness of the sampling test and the process adjustment and quality control decisions made based on the sample analysis results. Summary of the invention

[0007] To this end, the present invention provides a fully automatic hanging bottle type online sampling device for a reactor, which is used to overcome the problem that the prior art cannot adaptively adjust the sampling position of the closed sampling according to the component distribution state of the reactants in the reactor.

[0008] To achieve the above object, the present invention provides a fully automatic hanging bottle type online sampling device for a reactor, comprising:

[0009] A sampling hanging bottle is used to sink the reactants in the reactor for sampling;

[0010] The sampling box is connected to the reactor through an opening and closing valve on the top of the reactor, and comprises a shell and a lifting motor arranged inside the shell to drive the sampling hanging bottle to rise and fall through a hanging rope;

[0011] A pre-sampling unit, which is connected to the sampling box and is used to control the lifting motor to drive the sampling hanging bottle to perform pre-sampling action according to a sampling trigger signal;

[0012] Wherein, the pre-sampling action includes several periodic sedimentation processes, and a single periodic sedimentation process includes the sampling bottle sinking from a preset position to a preset sinking distance and returning to the preset position;

[0013] An information monitoring unit is arranged at the bottom of the sampling hanging bottle, and is used to obtain the force value of the sampling hanging bottle during the sinking process in the reactant, and draw a real-time force value curve of the sampling hanging bottle sinking from a preset position to a preset sinking distance during each period of sedimentation;

[0014] An online analysis unit, which is connected to the information monitoring unit, is used to determine whether there is a local enrichment phenomenon of the reactant according to the comparison results between the real-time force value curves of several periodic sedimentation processes, and to determine the sampling position of the sampling bottle for sampling according to the change of the force peak value of each real-time force value curve;

[0015] The sampling execution unit is respectively connected to the online analysis unit and the sampling box, and is used to control the lifting motor to drive the sampling bottle to sink to the sampling position for sampling and adjust the static time of the sampling bottle at the sampling position according to the comparison result of the real-time force value curve.

[0016] Furthermore, the preset position is the position where the sampling bottle contacts the reactants in the reactor.

[0017] Furthermore, the information monitoring unit is used to draw a real-time force value curve, wherein:

[0018] The information monitoring unit obtains in real time the force value of the sampling bottle when it sinks a preset sinking distance from a preset position, and draws a real-time force value curve showing the force value changing with the sinking distance. The real-time force value curve takes the sinking distance as the horizontal axis and the force value as the vertical axis.

[0019] Furthermore, the online analysis unit is used to obtain comparison results of several real-time force value curves, wherein:

[0020] The online analysis unit obtains a real-time force value curve corresponding to a preset sinking distance of the sampling bottle from a preset position during several periodic sedimentation processes;

[0021] The curve coincidence degree between each real-time force value curve and the other real-time force value curves is calculated, and the average value of the curve coincidence degree is determined as the distribution characterization coefficient.

[0022] Furthermore, the online analysis unit is used to determine whether there is a local enrichment phenomenon of the reactant, wherein:

[0023] If the comparison results of several real-time force value curves meet the local enrichment judgment condition, the online analysis unit determines that the reactant has a local enrichment phenomenon.

[0024] Furthermore, the local enrichment determination condition is that the distribution characterization coefficient does not exceed a preset distribution characterization coefficient threshold.

[0025] Furthermore, the online analysis unit is used to obtain the change of the peak force value of each real-time force value curve, wherein:

[0026] The online analysis unit obtains the force peak point of the real-time force value curve corresponding to the preset sinking distance of the sampling bottle from the preset position during several periodic sedimentation processes;

[0027] The sinking distance values ​​corresponding to each force peak point are obtained, the maximum sinking distance value is determined as the first sampling recommended distance, and the minimum sinking distance value is determined as the second sampling recommended distance.

[0028] Furthermore, the online analysis unit is also used to determine a sampling position for the sampling bottle to take samples according to the first recommended sampling distance and the second recommended sampling distance;

[0029] The first sampling recommended distance is an upper limit of the distance interval, and the second sampling recommended distance is a lower limit of the distance interval.

[0030] Furthermore, the sampling execution unit is used to adjust the static time of the sampling bottle at the sampling position, wherein:

[0031] The sampling execution unit adjusts the static time of the sampling bottle at the sampling position according to the distribution characterization coefficient, and the static time is negatively correlated with the distribution characterization coefficient.

[0032] Furthermore, the sampling box also includes a glove operation unit arranged on the side wall of the sampling box for facilitating manual pouring of the reactants in the sampling bottle into the sampling bottle, and an exhaust gas collection unit connected to the sampling box for collecting gases generated by the reactants.

[0033] Compared with the prior art, the beneficial effect of the present invention lies in that the present invention is provided with a sampling hanging bottle, a sampling box, a pre-sampling unit, an information monitoring unit, an online analysis unit, and a sampling execution unit; sampling is performed through the sampling hanging bottle, and the sampled reactant is obtained through the sampling box; the pre-sampling unit controls the lifting motor to drive the sampling hanging bottle to perform a pre-sampling action according to a sampling trigger signal; the force value of the sampling hanging bottle in the sinking process in the reactant is obtained through the information monitoring unit, and a real-time force value curve is drawn; the online analysis unit determines whether there is a local enrichment phenomenon in the reactant according to the comparison results of the real-time force value curves of several periodic sedimentation processes, and determines the sampling position for sampling by the sampling hanging bottle according to the change of the force peak value of each force value curve; the sampling execution unit controls the lifting motor to drive the sampling hanging bottle to sink to the sampling position for sampling and adjusts the static time of the sampling hanging bottle at the sampling position, thereby realizing adaptive adjustment of the sampling position of the closed sampling according to the component distribution state of the reactant in the reactor, and improving the representativeness of the sampling detection.

[0034] In particular, the present invention uses an information monitoring unit to draw a real-time force value curve of the sampling bottle sinking a preset sinking distance from a preset position during each periodic sedimentation process. It can be understood that the composition and state of the reactants in the reactor are constantly changing during the reaction process. When the sampling bottle moves in the reactor, the resistance to the sampling bottle will change due to the different composition and state of the reactants. By drawing the real-time force value curve, the changes in the composition and state of the reactants can be reflected according to the changes in the real-time force value curve. At the same time, the reaction process in the reactor is dynamic. As the reaction proceeds, the physical and chemical properties of the reactants will change. As the progress of the reaction changes, the density and viscosity of the solid and liquid reactants also change accordingly, which in turn affects the resistance to the sampling bottle. By obtaining the real-time force value curve, the state changes of the reactants in the reactor are quantified, providing a scientific basis for the subsequent sampling process.

[0035] In particular, the present invention determines whether there is a local enrichment phenomenon of the reactants based on the comparison results between the real-time force value curves of several periodic sedimentation processes through an online analysis unit. It can be understood that the real-time force value curves corresponding to several periodic sedimentation processes can characterize the physical state of the same sedimentation process at different times in the reactor. By calculating the overlap between these real-time force value curves, the similarity of the uniformity of material distribution in the reactor in different sampling cycles can be quantified. When the overlap of the real-time force value curves is high, the change law of the force applied to the sampling bottle during each sedimentation process is similar, indicating that the composition of the reactants in the reactor is uniform. When the overlap of the real-time force value curves is low, the force applied to the sampling bottle during each sedimentation process is quite different. This is because the physical properties of the reactants in the reactor, such as the material density and viscosity, have changed, and the reactants have local enrichment. Therefore, the actual state of the reactants in the reactor is obtained, thereby improving the representativeness of sampling detection.

[0036] In particular, the present invention determines the sampling position of the sampling bottle for sampling according to the change of the force peak value of each force value curve through the online analysis unit. It can be understood that the force peak point of each force value curve can represent that there are more data representative reactants distributed here. Sampling reactants with more data representativeness can improve the accuracy of subsequent process adjustments based on the sample analysis results. Since substances may mix, diffuse or locally enrich during the reaction process, the distance setting interval of the sampling position is formed according to the maximum and minimum values ​​of the sinking distance value, so that the sample in the reactor can be obtained more accurately, and the representativeness of the sampling is improved. The present invention determines the sampling position of the sampling bottle for sampling according to the change of the force peak value of each force value curve, and then realizes the adaptive adjustment of the sampling position of the closed sampling according to the component distribution state of the reactants in the reactor, thereby improving the representativeness of the sampling detection.

[0037] In particular, the present invention adjusts the standing time of the sampling bottle at the sampling position according to the distribution characterization coefficient through the sampling execution unit. It can be understood that the distribution characterization coefficient can reflect the uniformity of the reactants in the reactor. When the distribution characterization coefficient is large, the overlap of the force value curves characterizing multiple periodic sedimentation processes is high, the material distribution in the reactor is relatively uniform, and the composition is relatively stable. The sampling bottle only needs a short standing time at the sampling position to obtain a reactant sample with strong data representativeness. When the distribution characterization coefficient is small, it characterizes that the reactants are locally enriched or have large composition changes. Because the differences in the physical properties of the reactants at different positions lead to changes in the force conditions of the sampling bottle during the sinking process, the differences between the force value curves increase, and the sampling bottle needs a longer standing time at the sampling position to avoid the poor representativeness of the reactant sample data obtained in a short time. The present invention adjusts the standing time of the sampling bottle at the sampling position through the distribution characterization coefficient, thereby realizing the adaptive adjustment of the sampling position of the closed sampling according to the component distribution state of the reactants in the reactor, thereby improving the representativeness of the sampling detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a simplified structural diagram of a fully automatic hanging bottle type online sampling device for a reactor according to an embodiment of the present invention;

[0039] Figure 2 A simplified structural diagram of a sampling box according to an embodiment of the present invention;

[0040] Figure 3 This is a functional block diagram of a fully automatic hanging bottle type online sampling device for a reactor according to an embodiment of the present invention;

[0041] Figure 4 A logic flow chart of an online analysis unit according to an embodiment of the present invention for determining whether a reactant has a local enrichment phenomenon;

[0042] In the figure: 1- sampling box; 2- lifting motor; 3- lifting rope; 4- opening and closing valve; 5- reaction kettle; 6- tail gas collection unit; 7- visual window; 8- glove operation unit; 9- sampling bottle; 10- sampling hanging bottle. DETAILED DESCRIPTION

[0043] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0045] It should be noted that, in the description of the present invention, terms such as "upper", "lower", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0046] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] See also Figures 1 to 3 As shown, Figure 1 This is a simplified structural diagram of a fully automatic hanging bottle type online sampling device for a reactor according to an embodiment of the present invention. Figure 2 This is a simplified structural diagram of the sampling box according to an embodiment of the present invention. Figure 3 This is a functional block diagram of a fully automatic hanging bottle type online sampling device for a reactor according to an embodiment of the present invention. The fully automatic hanging bottle type online sampling device for a reactor according to the present invention comprises:

[0048] A sampling hanging bottle 10 is used to sink the reactants in the reactor 5 for sampling;

[0049] The sampling box 1 is connected to the reactor 5 through the opening and closing valve 4 on the top of the reactor, and includes a shell and a lifting motor 2 arranged inside the shell to drive the sampling hanging bottle 10 to rise and fall through the hanging rope 3;

[0050] Specifically, the present invention does not limit the specific structure of the opening and closing valve 4. Preferably, it can be a gate valve, which controls the opening and closing of the valve by controlling the movement of the gate plate to achieve the connection between the reactor 5 and the sampling box 1. Gate valves are widely used in the field of chemical production and will not be described here.

[0051] Specifically, the present invention does not limit the specific structure of the lifting motor 2. Preferably, the lifting motor 2 can be a servo motor, which is widely used in the field of industrial automation and will not be described in detail here.

[0052] A pre-sampling unit, which is connected to the sampling box 1 and is used to control the lifting motor 2 to drive the sampling hanging bottle 10 to perform a pre-sampling action according to a sampling trigger signal;

[0053] Wherein, the pre-sampling action includes several periodic sedimentation processes, and a single periodic sedimentation process includes the sampling bottle sinking from a preset position to a preset sinking distance and returning to the preset position;

[0054] Specifically, the number of periodic sedimentation processes can be set by technical personnel in this field according to the sampling accuracy requirements. The higher the accuracy requirements, the more periodic sedimentation processes are performed. Preferably, the number of periodic sedimentation processes can be 4 times.

[0055] Specifically, the present invention does not limit the specific structure of the pre-sampling unit. Preferably, it can be a programmable logic device, which controls the operation of the lifting motor 2 by obtaining a sampling trigger signal. It is widely used in the industrial field and will not be described in detail here.

[0056] An information monitoring unit is provided at the bottom of the sampling hanging bottle 10 to obtain the force value of the sampling hanging bottle 10 during the sinking process in the reactant, and to draw a real-time force value curve of the sampling hanging bottle 10 sinking from a preset position to a preset sinking distance during each period of sedimentation;

[0057] Specifically, the preset sinking distance can be set by those skilled in the art according to the actual volume of the reactor 5. Preferably, when the volume of the reactor is 500L, the sinking distance can be 0.6m.

[0058] Specifically, the present invention does not limit the specific structure of the information monitoring unit. Preferably, the information monitoring unit can be composed of a pressure sensor and a microprocessor. The pressure sensor obtains the force value of the sampling bottle 10 during the sinking process in the reactant, transmits the force value data to the microprocessor, integrates the pressure data at each sampling moment, and draws a real-time force value curve.

[0059] An online analysis unit, which is connected to the information monitoring unit, is used to determine whether there is a local enrichment phenomenon of the reactant according to the comparison results between the real-time force value curves of several periodic sedimentation processes, and to determine the sampling position of the sampling bottle 10 for sampling according to the change of the force peak value of each real-time force value curve;

[0060] Specifically, the present invention does not limit the specific structure of the online analysis unit. Preferably, it can be a field programmable logic component to obtain the comparison result of the real-time force value curve to judge the reactant and determine the sampling position, which will not be repeated here.

[0061] The sampling execution unit is respectively connected to the online analysis unit and the sampling box 1, and is used to control the lifting motor 2 to drive the sampling bottle 10 to sink to the sampling position for sampling and adjust the static time of the sampling bottle 10 at the sampling position according to the comparison result of the real-time force value curve.

[0062] Specifically, the present invention does not limit the specific structure of the sampling execution unit. Preferably, the sampling execution unit can be a processor used in a computer to control the sampling bottle 10 to take samples and adjust the static time of the sampling bottle 10 at the sampling position, which will not be repeated here.

[0063] Specifically, the preset position is the position where the sampling bottle 10 contacts the reactants in the reactor 5 .

[0064] Specifically, the information monitoring unit is used to draw a real-time force value curve, wherein:

[0065] The information monitoring unit obtains in real time the force value of the sampling bottle 10 when it sinks a preset sinking distance from a preset position, and draws a real-time force value curve showing the force value changing with the sinking distance. The real-time force value curve takes the sinking distance as the horizontal axis and the force value as the vertical axis.

[0066] Specifically, the present invention uses an information monitoring unit to draw a real-time force value curve of the sampling bottle sinking a preset sinking distance from a preset position during each cycle of sedimentation. It can be understood that the composition and state of the reactants in the reactor are constantly changing during the reaction. When the sampling bottle moves in the reactor, the resistance to the sampling bottle will change due to the different composition and state of the reactants. By drawing the real-time force value curve, the changes in the composition and state of the reactants can be reflected according to the changes in the real-time force value curve. At the same time, the reaction process in the reactor is dynamic. As the reaction proceeds, the physical and chemical properties of the reactants will change. As the progress of the reaction changes, the density and viscosity of the solid and liquid reactants also change accordingly, which in turn affects the resistance to the sampling bottle. By obtaining the real-time force value curve, the state changes of the reactants in the reactor are quantified, providing a scientific basis for the subsequent sampling process.

[0067] Specifically, the online analysis unit is used to obtain comparison results of several real-time force value curves, wherein:

[0068] The online analysis unit obtains a real-time force value curve corresponding to a preset sinking distance of the sampling bottle 10 from a preset position during several periodic sedimentation processes;

[0069] The curve coincidence degree between each real-time force value curve and the other real-time force value curves is calculated, and the average value of the curve coincidence degree is determined as the distribution characterization coefficient.

[0070] Specifically, see Figure 4As shown, it is a logic flow chart of an online analysis unit according to an embodiment of the present invention for determining whether a reactant has a local enrichment phenomenon. The online analysis unit is used to determine whether a reactant has a local enrichment phenomenon, wherein:

[0071] If the comparison results of several real-time force value curves meet the local enrichment judgment condition, the online analysis unit determines that the reactant has a local enrichment phenomenon;

[0072] If the comparison results of several real-time force value curves do not meet the local enrichment judgment condition, the online analysis unit determines that there is no local enrichment phenomenon of the reactant.

[0073] Specifically, the local enrichment determination condition is that the distribution characterization coefficient does not exceed a preset distribution characterization coefficient threshold.

[0074] Specifically, the preset distribution characterization coefficient threshold may be set by a technician in this field according to the sampling accuracy requirement. The higher the accuracy requirement, the larger the preset distribution characterization coefficient threshold. Preferably, the distribution characterization coefficient threshold may be 0.9.

[0075] Specifically, the present invention determines whether there is a local enrichment phenomenon of the reactants based on the comparison results between the real-time force value curves of several periodic sedimentation processes through an online analysis unit. It can be understood that the real-time force value curves corresponding to several periodic sedimentation processes can characterize the physical state of the same sedimentation process at different times in the reactor. The overlap between these real-time force value curves can be calculated to quantify the similarity of the uniformity of the material distribution in the reactor in different sampling cycles. When the overlap of the real-time force value curves is high, the change law of the force applied to the sampling bottle during each sedimentation process is similar, indicating that the composition of the reactants in the reactor is uniform. When the overlap of the real-time force value curves is low, the force applied to the sampling bottle during each sedimentation process is quite different. This is because the physical properties of the reactants in the reactor, such as the material density and viscosity, change, and the existence of local enrichment of the reactants. Furthermore, the actual state of the reactants in the reactor is obtained, thereby improving the representativeness of sampling detection.

[0076] Specifically, the online analysis unit is used to obtain the change of the force peak value of each real-time force value curve, wherein:

[0077] The online analysis unit obtains the force peak point of the real-time force value curve corresponding to the preset sinking distance of the sampling bottle 10 from the preset position during several periodic sedimentation processes;

[0078] The sinking distance values ​​corresponding to each force peak point are obtained, the maximum sinking distance value is determined as the first sampling recommended distance, and the minimum sinking distance value is determined as the second sampling recommended distance.

[0079] Specifically, the online analysis unit is also used to determine the sampling position of the sampling bottle 10 for sampling according to the first recommended sampling distance and the second recommended sampling distance;

[0080] The first sampling recommended distance is an upper limit of the distance interval, and the second sampling recommended distance is a lower limit of the distance interval.

[0081] Specifically, the present invention determines the sampling position of the sampling bottle for sampling according to the change of the force peak value of each force value curve through an online analysis unit. It can be understood that the force peak point of each force value curve can indicate that there are more data representative reactants distributed here. Sampling reactants with more data representativeness can improve the accuracy of subsequent process adjustments based on the sample analysis results. Since substances may mix, diffuse or locally enrich during the reaction process, the distance setting interval of the sampling position is formed according to the maximum and minimum values ​​of the sinking distance value, so that the sample in the reactor can be obtained more accurately, and the representativeness of the sampling is improved. The present invention determines the sampling position of the sampling bottle for sampling according to the change of the force peak value of each force value curve, and then realizes the adaptive adjustment of the sampling position of the closed sampling according to the component distribution state of the reactants in the reactor, thereby improving the representativeness of the sampling detection.

[0082] Specifically, the sampling execution unit is used to adjust the static time of the sampling bottle 10 at the sampling position, wherein:

[0083] The sampling execution unit adjusts the static time of the sampling bottle 10 at the sampling position according to the distribution characterization coefficient, and the static time is negatively correlated with the distribution characterization coefficient.

[0084] Specifically, the present invention adjusts the standing time of the sampling bottle at the sampling position according to the distribution characterization coefficient through the sampling execution unit. It can be understood that the distribution characterization coefficient can reflect the uniformity of the reactants in the reactor. When the distribution characterization coefficient is large, the overlap of the force value curves characterizing multiple periodic sedimentation processes is high, the material distribution in the reactor is relatively uniform, and the composition is relatively stable. The sampling bottle only needs a short standing time at the sampling position to obtain a reactant sample with strong data representativeness. When the distribution characterization coefficient is small, it characterizes that the reactants are locally enriched or the composition changes greatly. Because the difference in physical properties of reactants at different positions leads to the change in the force condition of the sampling bottle during the sinking process, the difference between the force value curves increases. The sampling bottle needs a longer standing time at the sampling position to avoid the poor representativeness of the reactant sample data obtained in a short time. The present invention adjusts the standing time of the sampling bottle at the sampling position through the distribution characterization coefficient, thereby realizing the adaptive adjustment of the sampling position of the closed sampling according to the component distribution state of the reactants in the reactor, thereby improving the representativeness of the sampling detection.

[0085] Specifically, the sampling box 1 also includes a glove operation unit 8 arranged on the side wall of the sampling box for manually pouring the reactants in the sampling bottle 10 into the sampling bottle 9, and an exhaust gas collection unit 6 connected to the sampling box 1 for collecting the gas generated by the reactants.

[0086] Specifically, the sampling box 1 also includes a visual window 7 arranged on the side wall of the sampling box for observing the internal situation of the sampling box. A sampling button is also arranged on the surface of the sampling box. When the operator presses the sampling button, a sampling trigger signal is output.

[0087] During implementation, when the operator presses the sampling button to output a sampling trigger signal, the opening and closing valve 4 opens, the pre-sampling unit controls the lifting motor 2 to drive the sampling bottle 10 to perform several cycles of sedimentation, the information monitoring unit obtains the force value of the sampling bottle 10 during the sinking process in the reactant, and draws a real-time force value curve, the online analysis unit determines whether there is a local enrichment phenomenon in the reactant according to the comparison result of the real-time force value curve, and determines the sampling position according to the change of the force peak value of each force value curve, the sampling execution unit controls the lifting motor 2 to sink the sampling bottle 10 to the sampling position for sampling, after the sampling is completed, the lifting motor 2 drives the sampling bottle 10 back to the sampling box 1, the opening and closing valve 4 is closed, and the operator pours the reactant in the sampling bottle 10 into the sampling bottle 9 through the glove operation unit 8 to complete the closed sampling of the reactant, and the gas overflowing from the reactor 5 during the sampling process is collected and processed by the exhaust gas collection unit 6.

[0088] Specifically, the present invention does not limit the specific structure of the glove operation unit 8. Preferably, the glove operation unit 8 is a glove hole set on the shell surface of the sampling box and a rubber glove fixed and sealed in the glove hole. The glove operation unit 8 is used to pour the reactants in the sampling bottle 10 into the sampling bottle 9. This structure is widely used in the fields of electronics industry, chemistry and materials, etc., and will not be repeated here.

[0089] Specifically, the present invention does not limit the specific structure of the tail gas collection unit 6. Preferably, it can collect the gas overflowing from the reactor 5 by cooperating with a negative pressure pump and a collection pipe. The gas overflowing from the reactor 5 is collected by a negative pressure pump to prevent gas leakage. This is a prior art and will not be repeated here.

[0090] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. 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 fully automatic hanging bottle type online sampling device for a reactor, characterized in that: include: A sampling hanging bottle is used to sink the reactants in the reactor for sampling; The sampling box is connected to the reactor through an opening and closing valve on the top of the reactor, and comprises a shell and a lifting motor arranged inside the shell to drive the sampling hanging bottle to rise and fall through a hanging rope; A pre-sampling unit, which is connected to the sampling box and is used to control the lifting motor to drive the sampling hanging bottle to perform pre-sampling action according to a sampling trigger signal; Wherein, the pre-sampling action includes several periodic sedimentation processes, and a single periodic sedimentation process includes the sampling bottle sinking from a preset position to a preset sinking distance and returning to the preset position; An information monitoring unit is arranged at the bottom of the sampling hanging bottle, and is used to obtain the force value of the sampling hanging bottle during the sinking process in the reactant, and draw a real-time force value curve of the sampling hanging bottle sinking from a preset position to a preset sinking distance during each period of sedimentation; An online analysis unit, which is connected to the information monitoring unit, is used to determine whether there is a local enrichment phenomenon of the reactant according to the comparison results between the real-time force value curves of several periodic sedimentation processes, and to determine the sampling position of the sampling bottle for sampling according to the change of the force peak value of each real-time force value curve; The sampling execution unit is respectively connected to the online analysis unit and the sampling box, and is used to control the lifting motor to drive the sampling bottle to sink to the sampling position for sampling and adjust the static time of the sampling bottle at the sampling position according to the comparison result of the real-time force value curve.

2. The fully automatic hanging bottle type online sampling device for a reactor according to claim 1 is characterized in that: The preset position is the position where the sampling bottle contacts the reactants in the reactor.

3. The fully automatic hanging bottle type online sampling device for a reactor according to claim 2 is characterized in that: The information monitoring unit is used to draw a real-time force value curve, wherein: The information monitoring unit obtains in real time the force value of the sampling bottle when it sinks a preset sinking distance from a preset position, and draws a real-time force value curve showing the force value changing with the sinking distance. The real-time force value curve takes the sinking distance as the horizontal axis and the force value as the vertical axis.

4. The fully automatic hanging bottle type online sampling device for a reactor according to claim 3 is characterized in that: The online analysis unit is used to obtain comparison results of several real-time force value curves, wherein: The online analysis unit obtains a real-time force value curve corresponding to a preset sinking distance of the sampling bottle from a preset position during several periodic sedimentation processes; The curve coincidence degree between each real-time force value curve and the other real-time force value curves is calculated, and the average value of the curve coincidence degree is determined as the distribution characterization coefficient.

5. The fully automatic hanging bottle type online sampling device for a reactor according to claim 4 is characterized in that: The online analysis unit is used to determine whether there is a local enrichment phenomenon of the reactant, wherein: If the comparison results of several real-time force value curves meet the local enrichment judgment condition, the online analysis unit determines that the reactant has a local enrichment phenomenon.

6. The fully automatic hanging bottle type online sampling device for a reactor according to claim 5 is characterized in that: The local enrichment determination condition is that the distribution characterization coefficient does not exceed a preset distribution characterization coefficient threshold.

7. The fully automatic hanging bottle type online sampling device for a reactor according to claim 6 is characterized in that: The online analysis unit is used to obtain the change of the peak force value of each real-time force value curve, wherein: The online analysis unit obtains the force peak point of the real-time force value curve corresponding to the preset sinking distance of the sampling bottle from the preset position during several periodic sedimentation processes; The sinking distance values ​​corresponding to each force peak point are obtained, the maximum sinking distance value is determined as the first sampling recommended distance, and the minimum sinking distance value is determined as the second sampling recommended distance.

8. The fully automatic hanging bottle type online sampling device for a reactor according to claim 7 is characterized in that: The online analysis unit is also used to determine the sampling position of the sampling bottle for sampling according to the first recommended sampling distance and the second recommended sampling distance; The first sampling recommended distance is an upper limit of the distance interval, and the second sampling recommended distance is a lower limit of the distance interval.

9. The fully automatic hanging bottle type online sampling device for a reactor according to claim 8, characterized in that: The sampling execution unit is used to adjust the static time of the sampling bottle at the sampling position, wherein: The sampling execution unit adjusts the static time of the sampling bottle at the sampling position according to the distribution characterization coefficient, and the static time is negatively correlated with the distribution characterization coefficient.

10. The fully automatic hanging bottle type online sampling device for a reactor according to claim 9, characterized in that: The sampling box also includes a glove operation unit arranged on the side wall of the sampling box for manually pouring the reactants in the sampling bottle into the sampling bottle, and an exhaust gas collection unit connected to the sampling box for collecting the gas generated by the reactants.

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