Temperature control device of reaction kettle
By introducing components such as high and low temperature pipeline circulation pumps, pneumatic diaphragm regulating valves, and fuzzy PID adaptive controllers into the reactor, the problem of low temperature control efficiency in the reactor was solved, achieving efficient and precise temperature control and energy-saving effects.
Patent Information
- Application Number
- CN202411155459.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2026-03-03
AI Technical Summary
Existing reactor heating devices are inefficient, cannot achieve assembly line operation, have low temperature control accuracy, and are not energy-efficient enough to meet the requirements of pharmaceutical production.
A temperature control device, including a control unit and a control system, is used. Through components such as high and low temperature pipeline circulation pumps, pneumatic diaphragm regulating valves, on/off valves, expansion tanks, and medium heat exchangers, combined with heating modules, constant temperature modules, and cooling modules, precise temperature control of the reactor is achieved. A fuzzy PID adaptive controller is used for rapid response.
It achieves efficient and precise temperature control of the reactor, supports multi-step programming, has power failure protection, reduces damage to the reactor, improves automation, and reduces energy consumption.
Smart Images
Figure CN121596931A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of temperature control technology and relates to a temperature control device for a reaction vessel. Background Technology
[0002] A reaction vessel is a container for physical or chemical reactions. Through structural design and parameter configuration, it achieves the heating, evaporation, cooling, and low-to-high-speed mixing functions required by the process. Reactors are widely used in petroleum, chemical, rubber, pesticide, dye, pharmaceutical, and food industries as pressure vessels to complete processes such as vulcanization, nitration, hydrogenation, hydrocarbonation, polymerization, and condensation. Examples include reactors, reaction vessels, decomposition vessels, and polymerization vessels. The materials generally include carbon manganese steel, stainless steel, zirconium, nickel-based alloys (Hastelloy, Monel, Inconel), and other composite materials.
[0003] A reaction vessel is a comprehensive reaction container. The design of its structure, function, and accessories is based on the reaction conditions. From initial feeding to reaction to discharge, the entire process can be automated to complete pre-set reaction steps. Strict control is maintained over important parameters such as temperature, pressure, mechanical control (stirring, aeration, etc.), and reactant / product concentrations. Pharmaceutical reaction vessels have extremely high temperature requirements; significant temperature differences can affect the polymerization or other chemical reactions of drug components. Existing heating devices for reaction vessels can only heat or cool a single vessel individually, resulting in low efficiency and preventing automated production lines. Furthermore, these devices are often energy-inefficient and lack sufficient temperature control precision, failing to meet pharmaceutical production requirements and necessitating improvement. Summary of the Invention
[0004] The purpose of this invention is to provide a temperature control device for a reaction vessel to solve the problems mentioned in the background art.
[0005] The objective of this invention can be achieved through the following technical solution: a temperature control device for a reactor, comprising a control device and a control system. The control device consists of a main equipment frame, a reactor body, a high-low temperature pipeline circulation pump, a pneumatic diaphragm regulating valve, a switching valve, an expansion tank, inlet and outlet pipelines, a medium heat exchanger, and control components. The main equipment frame and the reactor body are regulated by the control system. The high-low temperature pipeline circulation pump, the pneumatic diaphragm regulating valve, the switching valve, the expansion tank, the mixer, and the medium heat exchanger are located inside the main equipment frame. The control system consists of a heating module, a constant temperature module, and a cooling module. The high-low temperature pipeline circulation pump is a high-low temperature resistant centrifugal magnetic pump, and the expansion tank is made of SUS304 stainless steel with an internal volume of 10L.
[0006] In the temperature control device of the above-mentioned reactor, the inlet and outlet pipes include reactor jacket inlet and outlet, hot medium inlet and outlet, cold medium inlet and outlet and compressed air inlet. A cryogenic liquid inlet pipe and a cryogenic liquid outlet pipe are provided between the reactor body and the main frame of the equipment. A steam pipe and a condensate pipe are provided on the back of the main frame of the equipment.
[0007] In the temperature control device of the above-mentioned reactor, one end of the cryogenic liquid inlet pipe is connected to the inlet and outlet of the reactor jacket through a high-low temperature pipeline circulation pump, and temperature sensors and pressure sensors are provided at both the inlet and outlet ends of the cryogenic liquid inlet pipe. The cryogenic liquid inlet pipe exchanges heat through a medium heat exchanger and a steam pipeline. The temperature sensors and pressure sensors used above are all existing publicly disclosed sensor structures, and the medium heat exchanger is an existing publicly disclosed spiral wound heat exchanger.
[0008] In the temperature control device of the above-mentioned reactor, the functions of the heating module, the constant temperature module and the cooling module are as follows: According to the temperature regulation requirements inside the reactor and the heat absorption and release of materials during the reaction process, the heating module, the constant temperature module and the cooling module will react in a timely manner, accurately and quickly adjusting the working status of various automatic control valves of the control device to achieve the purpose of temperature control.
[0009] In the temperature control device of the above-mentioned reactor, one end of the cryogenic liquid discharge pipe is connected to the inlet and outlet of the reactor jacket. Temperature sensors and pressure sensors are installed at both the inlet and outlet ends of the cryogenic liquid discharge pipe. The temperature sensors and pressure sensors are existing publicly available sensors, specifically model PT100.
[0010] In the temperature control device of the above-mentioned reactor, an expansion tank is provided at the outlet end of the cryogenic liquid discharge pipe, and the output port of the expansion tank is connected to the cryogenic liquid inlet pipe. Pneumatic diaphragm regulating valves and switching valves are provided on the cryogenic liquid inlet pipe, the cryogenic liquid discharge pipe, the steam pipe and the condensate pipe. The pneumatic diaphragm regulating valves and switching valves are controlled by a control component, and the control component is a programmable controller, which is a fuzzy PID adaptive controller.
[0011] In the temperature control device of the aforementioned reactor, the control system further includes a main screen unit, a trend curve unit, an operation setting unit, an alarm recording unit, a log recording unit, and an access control unit. All the unit structures disclosed above are the operating units of this application for temperature control of the reactor. Operating the touchscreen, on the main screen unit, the target temperature SV value is set, and pressing the "Start" button automatically starts the circulating pump, and the temperature control system runs automatically. The "Circulation" button allows independent operation; when "Circulation On" is enabled, the system's circulating pump runs. Note: The circulating pump automatically starts during operation. The trend curve unit allows switching between "Trend Curves" and real-time viewing of the temperature control curve. When the "Alarm Clear" indicator on the main interface is red, it indicates a system fault, which should be cleared. The system can only run after clicking "Alarm Clear" through the alarm recording unit. Fault information can be viewed in the alarm recording unit and the log recording unit. In the operation setting unit, the system can be set to a running mode, and multiple steps can be programmed. Each program segment can freely select between temperature and time control methods for execution.
[0012] Compared with the prior art, the advantages of the temperature control device for the reactor of the present invention are as follows:
[0013] 1. This device can simultaneously meet the selection of material temperature mode and heat transfer medium temperature control mode. It can perform comparison and traceability well in the process control of pharmaceutical and chemical industries. It has strong repeatability and operability. It can be programmed in multiple steps, and each program can freely select the two control modes of temperature and time to execute the program.
[0014] 2. It has a power failure protection function. After a power failure, the regulating valve will be automatically closed, the controller will be automatically reset and all set parameters and operating status parameters will be kept in the original settings before the power failure. The programmable controller has a fuzzy PID adaptive controller. Heating and cooling do not require cold and heat confrontation. It has a fast constant temperature calculation output function. It controls the temperature of the entire reaction process through precise and fast calculation. It can quickly respond to and control the exothermic and endothermic reactions that occur in the entire reaction process.
[0015] 3. It has a control display screen that can clearly display various temperatures, including the real-time online control status of the outlet and inlet temperatures of the temperature control system, record temperature curves, and has a temperature difference protection function between the inside and outside of the reactor. The temperature difference between the reactor jacket and the inside of the reactor can be freely set. After the temperature difference is set, if the temperature difference exceeds the set value during operation, the control device will make a timely safety response.
[0016] 4. The use of a single heat transfer medium for circulating heating and cooling avoids the damage to the reactor caused by the traditional equipment that directly introduces multiple heat transfer media such as steam, cooling water or cryogenic liquid to heat and cool the jacket. At the same time, the smaller fluid volume ensures rapid temperature control and minimal thermal reaction delay. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the temperature control device for the reactor of the present invention.
[0018] Figure 2 This is a schematic diagram of the temperature control process structure of the temperature control device for the reactor of the present invention.
[0019] In the diagram, 1. Main frame of the equipment; 2. Reactor body; 3. High and low temperature pipeline circulation pump; 4. Medium heat exchanger; 5. Expansion tank. Detailed Implementation
[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.
[0021] The temperature control device for the reactor includes a control unit and a control system. The control unit consists of the main frame 1, the reactor body 2, a high-low temperature pipeline circulation pump 3, a pneumatic diaphragm regulating valve, a switching valve, an expansion tank 5, inlet and outlet pipelines, a medium heat exchanger 4, and control components. The main frame 1 and the reactor body 2 are regulated by the control system. The high-low temperature pipeline circulation pump 3, the pneumatic diaphragm regulating valve, the switching valve, the expansion tank 5, the mixer, and the medium heat exchanger 4 are located inside the main frame 1. The control system consists of a heating module, a constant temperature module, and a cooling module. Based on the temperature regulation requirements inside the reactor during the production process in the pharmaceutical and chemical industry, as well as the heat absorption and release of materials during the reaction, the control module will react promptly and accurately adjust the operation of various automatic control valves in the TCU automatic control system to achieve the purpose of temperature control.
[0022] like Figure 1 , Figure 2 As shown, the temperature control device for the reactor of the present invention specifically includes inlet and outlet pipes such as reactor jacket inlet and outlet, hot medium inlet and outlet, cold medium inlet and outlet, and compressed air inlet. A cryogenic liquid inlet pipe and a cryogenic liquid outlet pipe are provided between the reactor body 2 and the main frame 1 of the equipment. A steam pipe and a condensate pipe are provided on the back of the main frame 1 of the equipment.
[0023] like Figure 1 , Figure 2 As shown, the temperature control device for the reactor of the present invention specifically includes a cryogenic liquid inlet pipe, one end of which is connected to the inlet and outlet of the reactor jacket via a high-low temperature pipeline circulation pump 3. Temperature sensors and pressure sensors are installed at both the inlet and outlet ends of the cryogenic liquid inlet pipe. The cryogenic liquid inlet pipe exchanges heat with a medium heat exchanger 4 and a steam pipeline.
[0024] like Figure 1 , Figure 2As shown, the temperature control device for the reactor of the present invention specifically comprises a heating module, a constant temperature module, and a cooling module, the functions of which are as follows: based on the temperature regulation requirements inside the reactor and the heat absorption and release status of the materials during the reaction process, the heating module, the constant temperature module, and the cooling module will react in a timely manner, accurately and quickly adjusting the working status of various automatic control valves of the control device to achieve the purpose of temperature control.
[0025] like Figure 1 , Figure 2 As shown, the temperature control device for the reactor of the present invention specifically includes a cryogenic liquid discharge pipe, one end of which is connected to the inlet and outlet of the reactor jacket, and temperature sensors and pressure sensors are provided at both the inlet and outlet ends of the cryogenic liquid discharge pipe.
[0026] like Figure 1 , Figure 2 As shown, the temperature control device for the reactor of the present invention specifically includes an expansion tank 5 at the outlet end of the cryogenic liquid discharge pipe, and the output port of the expansion tank 5 is connected to the cryogenic liquid inlet pipe. Pneumatic diaphragm regulating valves and switching valves are installed on the cryogenic liquid inlet pipe, the cryogenic liquid discharge pipe, the steam pipe, and the condensate pipe. The pneumatic diaphragm regulating valves and switching valves are controlled by a control component, and the control component is a programmable controller, which is a fuzzy PID adaptive controller.
[0027] like Figure 1 , Figure 2 As shown, the temperature control device for the reactor of the present invention, specifically, the control system also includes a main screen unit, a trend curve unit, an operation setting unit, an alarm recording unit, a log recording unit, and an access control unit. The above-disclosed unit structures are all operation units of the reactor in this application when controlling the temperature.
[0028] This invention relates to a temperature control device for a reactor. The device uses a 50Hz 380V power supply, and the power output must be greater than or equal to the total power of the instrument. The power supply must have a good grounding device. For three-phase power supplies, pay attention to the phase sequence. The device has internal protection; if incorrect, change the phase sequence. Before starting, perform a start-up check to confirm pipeline connections are secure and leak-free. Ensure the common system input, heat source, and gas source are on, with a gas source pressure of 0.5MPa. Turn on the device power. Power on the explosion-proof box power switch; the explosion-proof touchscreen will power on and display. Then, log in to the control system through the system login module, entering the username and corresponding password. After logging in, adjust the main screen unit, operate the touchscreen, set the target temperature (SV) value, and press the "Start" button. The circulation pump will automatically start, and the temperature control system will run automatically. The "Circulation" button allows independent operation; when "Circulation On" is enabled, the system circulation pump runs. Note: The circulation pump automatically starts during operation. Operation is done through the trend curve unit. During system operation, the "Trend Curve" can be switched to view the temperature control curve in real time. The "Alarm Clear" indicator on the main interface is... When the indicator is red, it indicates a system malfunction that should be resolved. The system can only be run again after clicking "Alarm Clear" in the alarm recording unit. The fault details can be viewed in the alarm recording unit and the log recording unit. In the operation settings unit, the system can be configured with different operating modes and can be programmed in multiple steps. Each program segment can freely choose between temperature and time control methods for execution. This invention utilizes existing public energy sources, such as steam, cryogenic refrigerant supplied by the cryogenic compressor refrigeration system in the refrigeration workshop, and cooling water. These are integrated into a single-fluid system or a two-stage loop used to control the temperature of equipment required for pharmaceutical and chemical processes through heat exchange. This forms a single heat transfer medium that circulates heat or cools the jacket of the reaction vessel, rather than directly introducing steam, cooling water, or cryogenic liquid into the jacket in the traditional way. Through PLC calculation and control, the entire reaction process is precisely temperature-controlled according to process requirements, achieving energy saving and consumption reduction, reducing the workload of workers, and ensuring better process execution by increasing the degree of automation.
[0029] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.
Claims
1. A temperature control device for a reaction vessel, comprising a control device and a control system, characterized in that, The control device consists of the main frame (1), the reactor body (2), the high and low temperature pipeline circulation pump (3), the pneumatic diaphragm regulating valve, the switch valve, the expansion tank (5), the inlet and outlet pipelines, the medium heat exchanger (4), and the control components. The main frame (1) and the reactor body (2) are regulated by the control system. The high and low temperature pipeline circulation pump (3), the pneumatic diaphragm regulating valve, the switch valve, the expansion tank (5), the mixer, and the medium heat exchanger (4) are located inside the main frame (1). The control system consists of a heating module, a constant temperature module, and a cooling module.
2. The temperature control device for the reactor according to claim 1, characterized in that, The inlet and outlet pipelines include the reactor jacket inlet and outlet, the heat medium inlet and outlet, the cold medium inlet and outlet, and the compressed air inlet. A cryogenic liquid inlet pipeline and a cryogenic liquid outlet pipeline are provided between the reactor body (2) and the main frame of the equipment (1). A steam pipeline and a condensate pipeline are provided on the back of the main frame of the equipment (1).
3. The temperature control device for the reactor according to claim 2, characterized in that, One end of the cryogenic liquid inlet pipe is connected to the inlet and outlet of the reactor jacket via a high-low temperature pipeline circulation pump (3), and temperature sensors and pressure sensors are installed at both the inlet and outlet ends of the cryogenic liquid inlet pipe. The cryogenic liquid inlet pipe exchanges heat with a medium heat exchanger (4) and a steam pipeline.
4. The temperature control device for the reactor according to claim 1, characterized in that, The specific functions of the heating module, the constant temperature module, and the cooling module are as follows: Based on the temperature regulation requirements inside the reactor and the heat absorption and release status of the materials during the reaction process, the heating module, the constant temperature module, and the cooling module will react in a timely manner, accurately and quickly adjusting the working status of various automatic control valves of the control device to achieve the purpose of temperature control.
5. The temperature control device for the reactor according to claim 3, characterized in that, One end of the cryogenic liquid discharge pipe is connected to the inlet and outlet of the reactor jacket, and temperature sensors and pressure sensors are installed at both the inlet and outlet ends of the cryogenic liquid discharge pipe.
6. The temperature control device for the reactor according to claim 5, characterized in that, An expansion tank (5) is provided at the outlet end of the cryogenic liquid discharge pipe, and the output port of the expansion tank (5) is connected to the cryogenic liquid inlet pipe. Pneumatic diaphragm regulating valves and switching valves are provided on the cryogenic liquid inlet pipe, the cryogenic liquid discharge pipe, the steam pipe and the condensate pipe. The pneumatic diaphragm regulating valves and switching valves are controlled by a control component, and the control component is a programmable controller. The programmable controller is a fuzzy PID adaptive controller.
7. The temperature control device for the reactor according to claim 1, characterized in that, The control system also includes a main screen unit, a trend curve unit, an operation setting unit, an alarm recording unit, a log recording unit, and an access control unit.