Reactor with multi-position temperature measurement function

Abstract

The utility model discloses a reactor with a multi-position temperature measurement function, which comprises a reactor main body and a multi-point thermometer, and the multi-point thermometer comprises a temperature sensing element and a temperature transmitter connected with the temperature sensing element; the temperature sensing element comprises an extension section and a first temperature sensing section which are connected in sequence; the first temperature sensing section is arranged along the direction in which materials in the reactor main body enter the catalyst bed layer, and the first temperature sensing section is arranged in the catalyst bed layer so as to detect the temperature of a plurality of positions in the catalyst bed layer; and the extension section penetrates through the shell of the reactor main body and is connected with the temperature transmitter, so that the temperature transmitter acquires temperature data. The problem of leakage in the reactor possibly caused by arranging a plurality of thermometers is avoided, and the technical effect that the temperatures of a plurality of positions in the reactor can be monitored only by arranging one thermometer in the reactor is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of reactors, in particular to a reactor with multi-position temperature measurement. Background Art

[0002] In the chemical industry, the accurate monitoring and stable control of the reactor temperature are the cornerstones to ensure the safety of the production process and the quality of products. The temperature change inside the reactor directly affects the reaction rate, reaction efficiency and product selectivity. Especially in complex chemical reaction processes, even a slight temperature fluctuation may trigger a chain reaction, leading to the imbalance of the entire reaction system.

[0003] Especially for gas-phase reactors such as methylamine reactors, their operation involves the gasification of methanol and liquid ammonia, and important chemical products such as monomethylamine, dimethylamine and trimethylamine are generated under the action of catalysts. Methylamine reactors usually adopt the design of adiabatic fixed beds, which means that the accumulation and dissipation of heat during the reaction process need to be strictly controlled to avoid excessive temperature fluctuations. However, in actual operation, the complexity of the reaction process and the uncertainty of temperature changes often lead to uneven temperature distribution in the bed layer. This non-uniformity not only affects the reaction efficiency and product selectivity, but may also cause serious safety problems such as reactor runaway temperature. Runaway temperature refers to the rapid increase in the temperature inside the reactor beyond the normal operating range, which may lead to serious consequences such as reactor damage, leakage and even explosion.

[0004] In the prior art, although there are various temperature measurement methods for methylamine reactors, they all have certain limitations. One way is to set temperature measurement ports at the inlet and outlet of the reactor and the center of the bed layer. This way may be relatively effective in small-diameter reactors, but for large-diameter reactors, due to the non-uniformity of temperature distribution, the measured temperature data often cannot comprehensively reflect the actual temperature condition of the bed layer.

[0005] Another way is the radial side insertion type, which measures the temperature at different positions by inserting temperature probes on the side of the reactor, as Figure 2 shown. But for each additional vertical (or axial) temperature measurement point, a temperature opening needs to be added to the reactor, which not only increases the complexity and maintenance cost of the equipment, but may also affect the sealing performance of the reactor. Especially for high-temperature and high-pressure reactors, too many openings will greatly increase the risk of leakage.

[0006] Therefore, there is an urgent need for a reactor with multi-position temperature measurement to accurately and comprehensively monitor the temperature of methylamine reactors. Summary of the Utility Model

[0007] An embodiment of the present utility model provides a reactor with multi-position temperature measurement, which at least partially solves the technical problem in the prior art that multiple holes need to be set for temperature monitoring at multiple positions of the reactor, and achieves the technical effect that only one hole needs to be set on the reactor shell to monitor the temperature at multiple positions of the reactor.

[0008] In a first aspect, to solve the above technical problem, an embodiment of the present utility model provides the following technical solutions:

[0009] A reactor with multi-position temperature measurement, comprising:

[0010] A reactor main body,

[0011] A multi-point thermometer, the multi-point thermometer comprising a temperature sensing element and a temperature transmitter connected to the temperature sensing element;

[0012] The temperature sensing element includes an extension section and a first temperature sensing section connected in sequence; the first temperature sensing section is arranged along the direction in which the material in the reactor main body enters the catalyst bed, the first temperature sensing section is arranged in the catalyst bed to detect the temperature at multiple positions in the catalyst bed; the extension section passes through the shell of the reactor main body and is connected to the temperature transmitter for the temperature transmitter to collect temperature data.

[0013] Optionally, the temperature sensing element is a flexible tube.

[0014] Optionally, an inclined hole is provided on the shell of the reactor main body, and the included angle between the inclined hole and the outer surface of the shell is an acute angle; the extension section passes through the inclined hole and is connected to the temperature transmitter, and the included angle between the extension section and the first temperature sensing section is an obtuse angle.

[0015] Optionally, the temperature sensing element further includes a second temperature sensing section, the second temperature sensing section is arranged between the extension section and the first temperature sensing section, and the second temperature sensing section is arranged along the direction in which the material in the reactor main body enters the catalyst bed to detect the temperature of the material before entering the catalyst bed.

[0016] Optionally, the reactor further includes a plurality of fixing members, and the plurality of fixing members fix the first temperature sensing section and / or the second temperature sensing section to the inner wall of the shell of the reactor main body.

[0017] Optionally, each of the fixing members is provided with a through hole adapted to the temperature sensing element and a clamp arranged on the through hole; the first temperature sensing section and / or the second temperature sensing section pass through all the through holes, and the clamp fixes the first temperature sensing section and / or the second temperature sensing section.

[0018] Optionally, the temperature sensing element further includes a third temperature sensing section, which is sequentially connected in the order of the extension section, the second temperature sensing section, the first temperature sensing section, and the third temperature sensing section; the third temperature sensing section is arranged along the direction in which the material in the reactor body leaves the catalyst bed to detect the temperature of the material leaving the catalyst bed.

[0019] Optionally, the multi-point thermometer is connected to the reactor body through a flange.

[0020] Optionally, the multi-point thermometer further includes:

[0021] A pressure transmitter,

[0022] A sealing mechanism, one end of the sealing mechanism is connected to the temperature transmitter, and the other end of the sealing mechanism is connected to the reactor body through a flange; the sealing mechanism and the flange form a sealing cavity, which is used to accommodate the extension section located outside the reactor body, and the sealing cavity is communicated with the pressure transmitter, and the pressure transmitter judges whether there is a leak by detecting the pressure in the sealing cavity.

[0023] Optionally, the sealing mechanism includes:

[0024] A ferrule, the ferrule is connected to the temperature transmitter;

[0025] A sleeve, the sleeve is used to accommodate the extension section located outside the reactor body, and the sleeve, the ferrule and the flange form a sealing cavity, and the sealing cavity is hermetically connected to the pressure transmitter;

[0026] The ferrule, the sleeve and the flange are sequentially hermetically connected.

[0027] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0028] By providing a multi-point thermometer, the present invention realizes accurate monitoring of the temperatures at multiple positions in the reactor. The temperature sensing element adopted by this thermometer is bent and installed inside the reactor, so that the temperature sensing element extends along the vertical direction, ensuring that the measurement points are evenly distributed inside the catalyst bed, thereby monitoring the change of hot spots and effectively preventing local overheating. At the same time, only one insertion hole needs to be provided on the reactor, and the temperature sensing element passes through the reactor body, which not only simplifies the installation steps, but also effectively avoids the leakage problem in the reactor that may be caused by multiple holes. On the premise of ensuring the sealing performance, the technical effect of being able to monitor the temperatures at multiple positions in the reactor by only setting one hole on the reactor shell is achieved. Description of the Drawings

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 Structural schematic diagram of a reactor with multi-position temperature measurement provided by the present invention;

[0031] Figure 2 Structural schematic diagram of the prior art provided by the present invention;

[0032] Figure 3 Structural schematic diagram of another mode in the present invention;

[0033] Figure 4 Structural schematic diagram of the multi-point thermometer in the present invention.

[0034] Reference numerals: 1, reactor main body; 11, housing; 12, catalyst bed; 13, inclined hole; 14, fixing member; 2, multi-point thermometer; 21, temperature sensing element; 211, extension section; 212, first temperature sensing section; 213, second temperature sensing section; 214, third temperature sensing section; 22, temperature transmitter; 23, sealing mechanism; 231, ferrule; 232, sleeve; 3, flange; 4, ordinary thermometer; 5, pressure transmitter. Specific embodiments

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the 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 shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0037] In the description of the embodiments of the present utility model, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this utility model is customarily placed during use, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for differential description and cannot be construed as indicating or implying relative importance.

[0038] In the description of the embodiments of the present utility model, "a plurality of" represents at least two.

[0039] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged" and "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0040] It should be understood that the embodiments of the present utility model and the specific features in the embodiments are detailed descriptions of the technical solutions of this application, rather than limitations to the technical solutions of this application. Without conflict, the technical features in the embodiments of this application and the embodiments can be combined with each other.

[0041] In addition, the term "and / or" appearing in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the front and rear associated objects.

[0042] In the embodiments of the present utility model, there is provided a Figure 1 reactor with multi-position temperature measurement as shown in

[0043] The reactor main body 1 precisely controls the high-temperature and high-pressure environment. Taking the methylamine reactor as an example, under the action of a catalyst, methanol and ammonia undergo a chemical reaction to generate methylamine series compounds. This device not only has high synthesis ability, but also realizes energy conservation and environmental protection through optimized design and heat recovery technology. The entire reaction process is logically clear and is an important device for producing methylamine in the chemical industry.

[0044] Multi-point thermometer 2, the multi-point thermometer 2 includes a temperature sensing element 21 and a temperature transmitter 22 connected to the temperature sensing element 21. Among them, the temperature sensing element 21 is the core component in the multi-point thermometer 2, and its principle is based on the physical characteristics of the thermal effect. Common temperature sensing elements 21 such as thermocouples and thermistors can sense changes at multiple positions on the sensing element and convert them into measurable electrical signals. The thermocouple reflects the temperature through the thermoelectric potential generated by two different metals under temperature differences, while the thermistor measures the temperature according to the characteristic that its resistance changes with temperature. The main function of the temperature sensing element 21 is to accurately convert the temperature information of the measured object into an electrical signal output, providing the original measurement data for the temperature transmitter 22, so as to ensure that the multi-point thermometer 2 can monitor and record the temperature changes at multiple positions in real time. The purpose of using such a temperature sensing element 21 is to ensure the continuity of measurement by using a relatively long temperature sensing element 21, so that it can measure the temperature data at multiple consecutive positions in a certain direction.

[0045] The temperature sensing element 21 includes an extension section 211 and a first temperature sensing section 212 connected in sequence; the first temperature sensing section 212 is arranged along the direction in which the material enters the catalyst bed 12 in the reactor main body 1, and the first temperature sensing section 212 is arranged in the catalyst bed 12 to detect the temperatures at multiple positions in the catalyst bed 12; the extension section 211 passes through the shell 11 of the reactor main body 1 and is connected to the temperature transmitter 22 for the temperature transmitter 22 to collect temperature data.

[0046] It should be noted that during the reaction process of the reactor, its complexity and the uncertainty of temperature changes will lead to uneven temperature distribution in the bed layer. To solve this fundamental problem, in this embodiment, the temperature sensing element 21 is provided to detect the temperatures at different positions in the vertical direction of the catalyst bed 12. In this embodiment, the temperature transmitter 22 of the multi-point thermometer 2 is arranged outside the reactor, and the extension section 211 passes through the shell 11 of the reactor and enters the catalyst bed 12 for temperature measurement. Also, because the temperature change in the catalyst bed 12 changes along the direction in which the material (i.e., catalyst and other materials) enters the catalyst bed 12, that is Figure 1 it changes from top to bottom (also in the vertical direction). Therefore, the first temperature sensing section 212 of the temperature sensing element 21 is arranged along the direction in which the material enters the catalyst bed 12 in the reactor main body 1, so as to detect the temperatures at multiple positions in the vertical direction in the catalyst bed 12.

[0047] In addition, since only the extension piece needs to pass through the shell 11 of the reactor, a hole needs to be opened on the reactor for the temperature detection device of the reactor. Compared with the prior art (such as Figure 2As shown, a common thermometer 4 is set at each detection point, and each thermometer needs to be provided with an opening on the reactor shell 11. The present invention significantly reduces the number of thermometer data and openings, and achieves the same functions. Moreover, the reduction in the number of openings effectively avoids the problem of internal leakage in the reactor that may be caused by multiple holes. On the premise of ensuring the sealing performance, the technical effect of monitoring the temperatures at multiple positions in the reactor by only providing one hole on the reactor shell is achieved.

[0048] It should be noted that if it is necessary to expand the lateral measurement points, the number of multi-point temperatures can be increased, as Figure 3 shown.

[0049] Furthermore, the temperature sensing element 21 is made of a flexible tube. This flexibility enables the temperature sensing element 21 to easily adapt to various complex curve shapes required inside the reactor, facilitating multi-point temperature measurement.

[0050] Furthermore, an inclined hole 13 is provided on the shell 11 of the reactor main body 1, and the included angle between the inclined hole 13 and the outer surface of the shell 11 is an acute angle; the extension section 211 passes through the inclined hole 13 and is connected to the temperature transmitter 22, and the included angle between the extension section 211 and the first temperature sensing section 212 is an obtuse angle.

[0051] It should be noted that if a straight hole is provided on the shell 11, the extension section 211 can only enter the reactor vertically, which requires a 90-degree bend during installation, making the installation inconvenient and prone to damage to the temperature sensing element 21 due to excessive bending. Therefore, in order to improve the installation convenience and protect the temperature sensing element 21, in this embodiment, the included angle between the inclined hole 13 and the outer surface of the shell 11 is an acute angle, and the included angle between the extension section 211 and the first temperature sensing section 212 is an obtuse angle, reducing the bending degree of the temperature sensing element 21.

[0052] Furthermore, the temperature sensing element 21 further includes a second temperature sensing section 213, which is arranged between the extension section 211 and the first temperature sensing section 212. The second temperature sensing section 213 is arranged along the direction in which the material in the reactor main body 1 enters the catalyst bed 12 to detect the temperature of the material before entering the catalyst bed 12. Among them, the second temperature sensing section 213 is intended to detect the temperature at the position closest to the catalyst bed 12, and based on the temperature data obtained by the first temperature sensing section 212, the staff can learn about the temperature change before and after entering the catalyst bed 12.

[0053] Further, the reactor further includes a plurality of fixing members 14, and the plurality of fixing members 14 fix the first temperature sensing section 212 and / or the second temperature sensing section 213 to the inner wall of the housing 11 of the reactor main body 1. Among them, the plurality of fixing members 14 are intended to fix the first temperature sensing section 212 and / or the second temperature sensing section 213 to prevent them from shaking and causing errors in detection. The specific fixing method is as follows: each fixing member 14 is provided with a through hole adapted to the temperature sensing element 21 and a clamp provided on the through hole; the first temperature sensing section 212 and / or the second temperature sensing section 213 pass through all the through holes, and the clamp fixes the first temperature sensing section 212 and / or the second temperature sensing section 213.

[0054] Further, the temperature sensing element 21 further includes a third temperature sensing section 214, and the third temperature sensing section 214 is sequentially connected in the order of the extension section 211, the second temperature sensing section 213, the first temperature sensing section 212, and the third temperature sensing section 214; the third temperature sensing section 214 is arranged along the direction in which the material in the reactor main body 1 leaves the catalyst bed 12 to detect the temperature of the material leaving the catalyst bed 12.

[0055] It should be noted that, among them, the third temperature sensing section 214 is intended to detect the temperature of the material leaving the catalyst bed 12, and based on the temperature data obtained by the first temperature sensing section 212 and the second temperature sensing section 213, it can enable the staff to learn about the temperature changes among the three stages of the material entering the catalyst bed 12, reacting in the catalyst bed 12, and leaving the catalyst bed 12, thereby obtaining the complete temperature change of the entire reaction process and providing a data basis for subsequent analysis.

[0056] Further, the multi-point thermometer 2 is connected to the reactor main body 1 through a flange 3.

[0057] Among them, the flange 3 connection provides extremely high sealing performance, ensures the firm and reliable connection between the thermometer and the reactor main body 1, and effectively prevents the leakage of the material in the reactor, which is crucial for maintaining the stable operation of the reactor. Secondly, the flange 3 connection can withstand a large water pressure and air pressure, ensuring that the thermometer can also work normally in a high-pressure environment and providing accurate temperature monitoring for the reactor.

[0058] Further, as Figure 4 shown, the multi-point thermometer 2 further includes:

[0059] A pressure transmitter 5, which is mainly used to measure and monitor the pressure in the sealing mechanism 23. The pressure transmitter 5 converts the pressure of the measured medium into a standard electrical signal, so that these pressure data can be received and processed in real time by a display instrument or a control system.

[0060] A sealing mechanism 23, one end of the sealing mechanism 23 is connected to the temperature transmitter 22, and the other end of the sealing mechanism 23 is connected to the reactor body 1 through the flange 3; the sealing mechanism 23 and the flange 3 form a sealing cavity, and the sealing cavity is used to accommodate the extension section 211 located outside the reactor body 1. The sealing cavity is communicated with the pressure transmitter 5, and the pressure transmitter 5 judges whether leakage occurs by detecting the pressure in the sealing cavity.

[0061] Specifically, the sealing mechanism 23 includes:

[0062] A ferrule 231, the ferrule 231 is connected to the temperature transmitter 22;

[0063] A sleeve 232, the sleeve 232 is used to accommodate the extension section 211 located outside the reactor body 1. The sleeve 232, the ferrule 231 and the flange 3 form a sealing cavity, and the sealing cavity is hermetically connected to the pressure transmitter 5;

[0064] The ferrule 231, the sleeve 232 and the flange 3 are hermetically connected in sequence.

[0065] Among them, the principle of the sealing mechanism 23 is to ensure that the extension section 211 outside the reactor body 1 is isolated from the external environment by constructing a sealing cavity. It is mainly composed of a ferrule 231, a sleeve 232 and a flange 3. These components are hermetically connected in sequence to jointly form a closed space, that is, the sealing cavity. The ferrule 231 is connected to the temperature transmitter 22 for receiving and transmitting data; while the sleeve 232 is used to accommodate the extension section 211 outside the reactor body 1 to ensure that the extension section 211 is completely surrounded in the sealing cavity.

[0066] The sealing cavity is hermetically connected to the pressure transmitter 5, and the pressure transmitter 5 can monitor the pressure change in the sealing cavity in real time. When the pressure in the sealing cavity remains constant or changes according to a preset law, it indicates that the sealing state is good and no leakage has occurred. Once it is detected that the pressure in the sealing cavity rises or falls abnormally, the pressure transmitter 5 will respond quickly and send an alarm through the detection terminal to prompt the operator to check and handle possible leakage problems.

[0067] In summary, the embodiment of the present invention provides a reactor with multi-position temperature measurement,

[0068] By setting a multi-point thermometer 2, the precise monitoring of the temperatures at multiple positions inside the reactor is achieved. The temperature sensing element 21 used in this thermometer is installed in a bent manner inside the reactor, enabling the temperature sensing element 21 to extend along the vertical direction, ensuring that the measurement points are evenly distributed inside the catalyst bed 12, thereby effectively preventing local overheating. At the same time, only one insertion hole needs to be set on the reactor. Passing the temperature sensing element 21 through the reactor main body 1 not only simplifies the installation steps but also effectively avoids the leakage problem inside the reactor that may be caused by multiple holes. On the premise of ensuring the sealing performance, the technical effect of being able to monitor the temperatures at multiple positions of the reactor by only setting one hole on the reactor shell is achieved. The use of the flexible tube further improves the adaptability and installation convenience of the multi-point thermometer 2. In addition, by setting a plurality of fixing members 14, the stability of the temperature sensing element 21 is ensured, avoiding detection errors. The flange 3 connection of the multi-point thermometer 2 provides high sealing performance, guaranteeing a firm connection between the thermometer and the reactor main body 1. The addition of the pressure transmitter 5 and the sealing mechanism 23 enables the real-time monitoring of the sealing state, promptly detecting and handling potential leakage problems.

[0069] Although the preferred embodiments of the present invention have been described above, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the present invention.

[0070] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A reactor with multi-position temperature measurement, characterized in that: The reactor comprises: Reactor body, A multi-point thermometer, comprising a temperature sensing element and a temperature transmitter connected to the temperature sensing element; The temperature sensing element includes an extension section and a first temperature sensing section connected in sequence; the first temperature sensing section is arranged along the direction in which the material in the reactor body enters the catalyst bed, and the first temperature sensing section is arranged in the catalyst bed to detect the temperatures of multiple positions in the catalyst bed; the extension section passes through the shell of the reactor body and is connected to the temperature transmitter so that the temperature transmitter can collect temperature data.

2. The reactor according to claim 1, characterized in that The temperature sensing element adopts a flexible tube.

3. The reactor according to claim 1, characterized in that An inclined hole is provided on the shell of the reactor body, and the angle between the inclined hole and the outer surface of the shell is an acute angle; the extension section passes through the inclined hole and is connected to the temperature transmitter, and the angle between the extension section and the first temperature sensing section is an obtuse angle.

4. The reactor according to any one of claims 1 to 3, characterized in that The temperature sensing element also includes a second temperature sensing section, which is arranged between the extension section and the first temperature sensing section. The second temperature sensing section is arranged along the direction in which the material in the reactor body enters the catalyst bed to detect the temperature of the material before entering the catalyst bed.

5. The reactor according to claim 4, characterized in that The reactor further comprises a plurality of fixing members, and the plurality of fixing members fix the first temperature sensing section and / or the second temperature sensing section on the inner wall of the shell of the reactor body.

6. The reactor according to claim 5, characterized in that Each of the fixing members is provided with a through hole adapted to the temperature sensing element and a clamp arranged on the through hole; the first temperature sensing section and / or the second temperature sensing section is penetrated through all the through holes, and the clamp fixes the first temperature sensing section and / or the second temperature sensing section.

7. The reactor according to claim 4, characterized in that The temperature sensing element also includes a third temperature sensing section, which is connected in sequence according to the extension section, the second temperature sensing section, the first temperature sensing section and the third temperature sensing section; the third temperature sensing section is arranged along the direction in which the material in the reactor body leaves the catalyst bed to detect the temperature of the material leaving the catalyst bed.

8. The reactor according to claim 1, characterized in that The multi-point thermometer is connected to the reactor body through a flange.

9. The reactor according to claim 8, characterized in that The multi-point thermometer also includes: Pressure transmitter, A sealing mechanism, one end of which is connected to the temperature transmitter, and the other end of which is connected to the reactor body through a flange; the sealing mechanism and the flange form a sealing cavity, and the sealing cavity is used to accommodate an extension section located outside the reactor body. The sealing cavity is connected to the pressure transmitter, and the pressure transmitter determines whether a leakage occurs by detecting the pressure in the sealing cavity.

10. The reactor according to claim 9, characterized in that The sealing mechanism comprises: A ferrule, the ferrule being connected to the temperature transmitter; A sleeve, the sleeve is used to accommodate an extension section located outside the reactor body, the sleeve, the ferrule and the flange form a sealed cavity, and the sealed cavity is sealedly connected to the pressure transmitter; The ferrule, the sleeve and the flange are sealed and connected in sequence.

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