Reaction kettle and temperature measuring system for preparing polyolefin catalyst

Abstract

The utility model discloses a reaction kettle and temperature measurement system used for preparing polyolefin catalyst, the reaction kettle comprises a kettle body and a temperature measurement assembly, the temperature measurement assembly is arranged to be capable of being partially inserted into the kettle body, the temperature measurement assembly comprises a plurality of thermal resistors to convert temperature signals received by the temperature measurement assembly into various electric signals, and the various electric signals are sent to the kettle body. A heat conduction piece is arranged at one end, positioned in the kettle body, of the temperature measurement assembly to improve the temperature response speed of the temperature measurement assembly. According to the technical scheme, the plurality of thermal resistors are simultaneously arranged in the temperature measuring assembly of the reaction kettle, so that various different electric signals can be output for comparison and reference, and the temperature measuring accuracy of the reaction kettle is improved; the heat conduction piece is arranged at the end part of the thermal resistor, so that the temperature response speed of the temperature measurement assembly can be increased, and the consistency of the temperature measurement and the actual temperature of the reaction kettle is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of reaction kettle temperature measurement, and particularly relates to a reaction kettle for preparing polyolefin catalyst and a temperature measurement system. BACKGROUND

[0002] In the synthesis and preparation process of polyolefin catalyst, temperature measurement of the reaction kettle is crucial for product quality and production efficiency. In actual operation, the problem of inconsistent temperature measurement response speed of different reaction kettles under the same process often occurs. The current solution is to open or close the control ball valve of the heat exchange medium (hot water, steam, etc.) in advance or delay according to the temperature control needs based on the operating experience of the operator. However, this will affect the production efficiency, and currently only one sensor is used to measure the temperature of the reaction kettle, which may not be accurate and may have a potential impact on product quality. Therefore, it is of great significance to develop a reaction kettle temperature measurement scheme that can ensure the accuracy and consistency of temperature measurement for improving the production efficiency and quality of polyolefin catalyst. SUMMARY

[0003] One of the technical problems to be solved by the utility model is how to ensure the accuracy and consistency of temperature measurement of the reaction kettle.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a reaction kettle for preparing polyolefin catalyst in the first aspect, which comprises a kettle body and a temperature measurement assembly, wherein the temperature measurement assembly is arranged to be partially inserted into the kettle body, the temperature measurement assembly comprises a plurality of thermal resistors to convert the temperature signal received by the temperature measurement assembly into a plurality of electrical signals, and one end of the temperature measurement assembly located in the kettle body is provided with a heat conduction member to improve the temperature response speed of the temperature measurement assembly.

[0005] In some embodiments, the temperature measurement assembly further comprises a temperature transmitter, and the plurality of thermal resistors are respectively electrically connected to the temperature transmitter.

[0006] In some embodiments, the temperature measurement assembly further comprises a support tube, and the plurality of thermal resistors are arranged to be inserted into the support tube along the length direction of the support tube.

[0007] In some embodiments, the temperature measurement assembly further comprises a sleeve pipe sleeved outside the support tube, the heat conduction member is a heat conduction block, and the top end of the heat conduction block is attached to the inner wall of the sleeve pipe.

[0008] In some embodiments, the temperature measurement assembly further comprises a sleeve pipe sleeved outside the support tube, the heat conduction member is a heat conduction oil, and the heat conduction oil is filled in the gap between the thermal resistor and the bottom of the sleeve pipe.

[0009] In some embodiments, the temperature transmitter has multiple output ports for outputting multiple types of current signals, resistance signals, and voltage signals.

[0010] In some embodiments, the temperature measuring assembly is detachably arranged on the kettle body.

[0011] The utility model discloses a second aspect provides a kind of temperature measurement system, including the reaction kettle for preparing polyolefin catalyst, and the control system of communication connection with the reaction kettle.

[0012] In some embodiments, the temperature measurement system further includes a signal acquisition instrument box for receiving the resistance signal output by the temperature measuring assembly and transmitting to the control system remotely.

[0013] In some embodiments, the control system is a DCS workstation or a PLC workstation.

[0014] Through the above technical solution, multiple thermal resistors are arranged in the temperature measuring assembly of the reaction kettle, which can output multiple different electrical signals for comparison and reference, improving the accuracy of the reaction kettle temperature measurement; The heat conduction member is arranged at the end of the thermal resistor, which can improve the temperature response speed of the temperature measuring assembly and improve the consistency of the reaction kettle temperature measurement and the actual temperature. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the schematic diagram of the temperature measurement system disclosed by the utility model;

[0016] Figure 2 is the structural schematic diagram of one embodiment of the temperature measuring assembly disclosed by the utility model;

[0017] Figure 3 is the structural schematic diagram of another embodiment of the temperature measuring assembly disclosed by the utility model;

[0018] Figure 4 is the structural schematic diagram of another embodiment of the temperature measuring assembly disclosed by the utility model.

[0019] REFERENCE SIGNS

[0020] 1, kettle body; 2, temperature measuring assembly; 3, temperature transmitter; 301, first output port; 302, second output port; 4, thermal resistor; 5, sleeve; 6, heat conduction block; 7, heat conducting oil; 8, jacket; 9, signal acquisition instrument box; 10, control system; 11, nut; 12, support pipe. DETAILED DESCRIPTION

[0021] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0022] To solve the problem that the accuracy and consistency of the temperature measurement of the reaction kettle cannot be ensured in the prior art, the present application provides a reaction kettle for preparing a polyolefin catalyst, which comprises a kettle body 1 and a temperature measurement assembly 2, wherein the temperature measurement assembly 2 is arranged to be partially inserted into the kettle body 1, the temperature measurement assembly 2 comprises a plurality of thermal resistors 4 to convert the temperature signals received by the temperature measurement assembly 2 into a plurality of electrical signals, and one end of the temperature measurement assembly 2 located in the kettle body 1 is provided with a heat conduction member to improve the temperature response speed of the temperature measurement assembly 2.

[0023] As shown in Figure 1 The kettle body 1 can be used as a reaction container for the synthesis and preparation of the polyolefin catalyst, and a jacket 8 is arranged on the outer wall of the kettle body 1 to introduce a heat transfer medium to heat the kettle body 1, and the jacket 8 can be preferably arranged at the middle and lower parts of the kettle body 1. The temperature measurement assembly 2 is used to measure the temperature and temperature change in the kettle body 1, and the temperature measurement assembly 2 can be vertically and partially inserted into the kettle body 1. Specifically, a through hole can be formed at the top of the kettle body 1 to accommodate the temperature measurement assembly 2 to pass through, and a sealing material or a sealing ring can be filled or fixed in the gap between the temperature measurement assembly 2 and the through hole to ensure the airtightness of the inside of the kettle body 1. One end of the temperature measurement assembly 2 close to the bottom of the kettle body 1 can be located at the lower part of the kettle body 1 and keep a certain distance from the bottom of the kettle body 1, so as to avoid the temperature measurement assembly 2 from being damaged due to contact with the kettle body 1 and affect the accuracy of the temperature measurement results.

[0024] The temperature measurement assembly 2 can select a thermal resistor 4 as a temperature measurement element, and specifically, the number of thermal resistors 4 in the present application can be multiple. The thermal resistor 4 is a sensor based on the thermal sensitivity effect, which can convert the collected temperature signals into electrical signals, and multiple thermal resistors 4 can convert the collected temperature signals into multiple electrical signals. In this way, the multiple different electrical signals output by the temperature measurement assembly 2 can be compared and referred to, thereby improving the accuracy of the temperature measurement of the reaction kettle.

[0025] The temperature measurement assembly 2 is provided with a heat conduction member at one end located in the kettle body 1, and the heat conduction member has high thermal conductivity, which can quickly transfer heat from the materials inside the kettle body 1 to the thermal resistor 4, thereby improving the temperature measurement accuracy and temperature response speed of the temperature measurement assembly 2. Specifically, one end of the thermal resistor 4 of the temperature measurement assembly 2 as a thermal sensitive probe is arranged to be inserted into the inside of the kettle body 1, and the heat conduction member arranged on the temperature measurement assembly 2 can be in contact with the thermal sensitive probe of the thermal resistor 4 and transfer heat.

[0026] In this scheme, multiple thermistors 4 are simultaneously set in the temperature measuring component 2 of the reactor, which can output a variety of different electrical signals for comparison and reference, thereby improving the accuracy of the reactor temperature measurement. A heat-conducting component is set at the end of the thermistor 4, which can improve the temperature response speed of the temperature measuring component 2 and improve the consistency between the reactor temperature measurement and the actual temperature.

[0027] In some embodiments, the temperature measuring component 2 further includes a temperature transmitter 3, and a plurality of thermal resistors 4 are electrically connected to the temperature transmitter 3 respectively.

[0028] Temperature transmitter 3 can convert the temperature signals received by multiple thermistors 4 into standard electrical signal outputs for measurement and control. Specifically, such as... Figures 1-4 As shown, the temperature transmitter 3 can be set outside the vessel body 1. One end of the thermistor 4 (i.e., one end of the thermistor probe) is inserted into the vessel body 1, and the other end of the thermistor 4 is located outside the vessel body 1 and electrically connected to the temperature transmitter 3. Multiple thermistors 4 are connected in parallel to the temperature transmitter 3.

[0029] In some embodiments, the temperature measuring assembly 2 further includes a support tube 12, and a plurality of thermal resistors 4 are configured to be inserted into the support tube 12 along the length of the support tube 12.

[0030] like Figures 2-4 As shown, the support tube 12 guides and limits the multiple resistance thermometers 4, ensuring that all resistance thermometers 4 are vertically inserted into the vessel body 1 and that they all measure the temperature at the same location within the vessel body 1. Specifically, the support tube 12 can be a long tube with an open top and a closed bottom; the upper end can be connected to the temperature transmitter 3, and the lower end can contact the heat-conducting component. The support tube 12 can be further filled with a filler material to support and fix the multiple resistance thermometers 4.

[0031] In some embodiments, the temperature measuring component 2 further includes a sleeve 5 fitted over the support tube 12, and the heat-conducting element is a heat-conducting block 6, with the top of the heat-conducting block 6 attached to the inner wall of the sleeve 5.

[0032] like Figure 2 and 3As shown, a sleeve 5 can be further fitted over the support tube 12. Specifically, a nut 11 can be installed on the top of the sleeve 5 to screw it onto the support tube 12. The sleeve 5 serves two purposes: firstly, it protects the thermal resistor 4 from mechanical impact and chemical corrosion, and secondly, it allows the temperature measuring component 2 to be used in a wider temperature measurement range. The sleeve 5 can be made of stainless steel, alloy steel, ceramic, etc. The lower end of the support tube 12 is positioned close to the bottom of the sleeve 5, with a spacing of 5-10 mm. The heat-conducting element can be a heat-conducting block 6, with its top end fitting against the inner wall of the sleeve 5 to increase the contact area for heat conduction, further improving the heat transfer effect and ensuring the temperature response speed of the temperature measuring component 2.

[0033] In some embodiments, the temperature measuring component 2 further includes a sleeve 5 fitted over the support tube 12, and the heat-conducting element is heat-conducting oil 7, which fills the gap between the thermal resistor 4 and the bottom of the sleeve 5.

[0034] like Figure 2 and 4 As shown, a sleeve 5 can be further fitted over the support tube 12. Specifically, a nut 11 can be installed on the top of the sleeve 5 to screw it onto the support tube 12. The sleeve 5 serves two purposes: firstly, it protects the thermal resistor 4 from mechanical impact and chemical corrosion, and secondly, it allows the temperature measuring component 2 to be used in a wider temperature measurement range. The sleeve 5 can be made of stainless steel, alloy steel, ceramic, etc. The lower end of the support tube 12 is positioned close to the bottom of the sleeve 5, with a spacing of 5-10 mm. The heat-conducting element can be heat-conducting oil 7, and the liquid level of the heat-conducting oil 7 above the bottom of the sleeve 5 can be set to 90-110 mm.

[0035] In some implementations, the temperature transmitter 3 has multiple output ports for outputting various signals, including current signals, resistance signals, and voltage signals.

[0036] The multiple output ports of the temperature transmitter 3 can be used to output any combination of current, resistance, and voltage signals, and each output port is electrically connected to one of the multiple thermal resistors 4. In one specific embodiment, such as Figure 1 and 2 As shown, the temperature transmitter 3 can be equipped with a first output port 301 and a second output port 302. The first output port 301 can be used to output a resistance signal, such as a PT100 signal, and the second output port can be used to output a current signal, such as a 4-20mA signal.

[0037] In some embodiments, the temperature measuring component 2 is detachably mounted on the vessel body 1. The temperature measuring component 2 can be snap-fitted or screwed onto the vessel body 1. Detachably mounting the temperature measuring component 2 on the vessel body 1 facilitates the modification of existing reactors, saves production costs, and also facilitates the maintenance and replacement of the temperature measuring component 2, improving installation efficiency.

[0038] The second aspect of this utility model provides a temperature measurement system, including a reaction vessel for preparing a polyolefin catalyst and a control system 10 communicatively connected to the reaction vessel.

[0039] In some embodiments, the temperature measurement system further includes a signal acquisition instrument box 9 for receiving the resistance signal output by the temperature measurement component 2 and transmitting it remotely to the control system 10. For example... Figure 1 As shown, the signal acquisition instrument box 9 can be placed close to the reactor and powered by 220V. A three-core PTFE cable can be used to connect it to the output port of the temperature transmitter 3.

[0040] In some implementations, the control system 10 is a DCS workstation or a PLC workstation. For example... Figure 1 As shown, the current signal output by the temperature transmitter 3 can be directly and remotely connected to the control system 10.

[0041] The working principle of this temperature measurement system can include:

[0042] Equipment selection: The temperature measuring component 2 inside the vessel body 1 is selected, manufactured, and calibrated to suitability.

[0043] Data Acquisition: Using the calibrated temperature sensing component 2, the temperature inside the reactor body 1 is continuously measured. Temperature data is recorded at fixed time intervals. Ensure that the operating conditions of the reactor remain consistent throughout the data acquisition process.

[0044] Data Analysis:

[0045] For the same reactor: the collected temperature data is processed and analyzed, and the temperature difference and temperature response rate difference at different time points in the same reactor are calculated by the control system 10. Statistical methods (such as mean, standard deviation, etc.) are used to analyze the volatility and stability of the temperature data.

[0046] Among them, multiple thermal resistors 4 at the same installation location can be compared and referenced through different signal transmissions, and the accuracy and consistency of the temperature measurement of the reactor can be judged by the algorithm developed by the control system 10.

[0047] For different reactors: The collected temperature data is processed and analyzed. The control system 10 calculates the actual temperature difference and temperature response rate difference within the reactor body 1 when different reactors reach the specified reaction state. Statistical methods (such as mean, standard deviation, etc.) are used to analyze the volatility and stability of the temperature data.

[0048] Anomaly Handling: If abnormal temperature data is detected (such as excessive temperature difference, slow temperature response, etc.), production should be stopped immediately and troubleshooting should be conducted. Check whether the temperature measuring component 2, the vessel body 1, and other hardware equipment are operating normally and eliminate hardware faults. At the same time, check whether the operators' operations are in accordance with regulations to avoid the influence of human factors on temperature measurement.

[0049] Monitoring and Reporting: Continuous monitoring of the reactor temperature will be conducted, and monitoring data and analysis results will be regularly compiled into a monitoring report. This report will be submitted to relevant departments and personnel to facilitate timely identification of problems and implementation of corrective measures.

[0050] Continuous Improvement: Based on monitoring results and analysis reports, the temperature measurement methods are continuously improved and optimized. By constantly adjusting and optimizing the temperature measurement methods, the accuracy and consistency of reactor temperature measurement are ensured, thereby improving production efficiency and product quality.

[0051] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A reaction vessel for preparing a polyolefin catalyst, characterized in that, The device includes a vessel body (1) and a temperature measuring component (2), wherein the temperature measuring component (2) is configured to be partially inserted into the vessel body (1), the temperature measuring component (2) includes multiple thermal resistors (4) to convert the temperature signal received by the temperature measuring component (2) into multiple electrical signals, and a heat-conducting element is provided at one end of the temperature measuring component (2) located inside the vessel body (1) to improve the temperature response speed of the temperature measuring component (2).

2. The reaction vessel for preparing a polyolefin catalyst according to claim 1, characterized in that, The temperature measuring component (2) also includes a temperature transmitter (3), and multiple thermal resistors (4) are electrically connected to the temperature transmitter (3).

3. The reaction vessel for preparing a polyolefin catalyst according to claim 2, characterized in that, The temperature measuring component (2) also includes a support tube (12), and a plurality of the thermal resistors (4) are configured to be inserted into the support tube (12) along the length direction of the support tube (12).

4. The reaction vessel for preparing a polyolefin catalyst according to claim 3, characterized in that, The temperature measuring component (2) also includes a sleeve (5) sleeved outside the support tube (12), and the heat-conducting component is a heat-conducting block (6), the top of which is attached to the inner wall of the sleeve (5).

5. The reaction vessel for preparing a polyolefin catalyst according to claim 3, characterized in that, The temperature measuring component (2) also includes a sleeve (5) sleeved outside the support tube (12), and the heat-conducting element is heat-conducting oil (7), which fills the gap between the thermal resistor (4) and the bottom of the sleeve (5).

6. The reaction vessel for preparing a polyolefin catalyst according to claim 2, characterized in that, The temperature transmitter (3) has multiple output ports for outputting various signals, including current signals, resistance signals, and voltage signals.

7. The reaction vessel for preparing a polyolefin catalyst according to claim 1, characterized in that, The temperature measuring component (2) is detachably mounted on the vessel body (1).

8. A temperature measurement system, characterized in that, The reactor for preparing a polyolefin catalyst as described in any one of claims 1-7, and the control system (10) communicatively connected to the reactor.

9. The temperature measurement system according to claim 8, characterized in that, The temperature measurement system also includes a signal acquisition instrument box (9), which is used to receive the resistance signal output by the temperature measurement component (2) and transmit it to the control system (10) over a long distance.

10. The temperature measurement system according to claim 8, characterized in that, The control system (10) is a DCS workstation or a PLC workstation.

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