Esterification kettle temperature control system

Abstract

The application relates to an esterification kettle temperature control system, belonging to the technical field of chemical equipment temperature control, which comprises an esterification kettle body, a temperature acquisition unit, a heating unit, a cooling unit and a central control unit. The temperature acquisition unit adopts a temperature sensor, the detection end of the temperature sensor extends to the inside of the esterification kettle body, the heating unit comprises a heating jacket sleeved outside the esterification kettle body and an electric heating wire, the cooling unit comprises a cooling coil in the esterification kettle body and a cooling liquid circulating assembly communicated with the cooling coil, and the central control unit is electrically connected with the temperature acquisition unit, the heating unit and the cooling unit. The start-stop of the electric heating wire in the corresponding section and the running state of the cooling liquid circulating assembly are controlled according to the temperature data collected by the temperature sensor. The application can realize the temperature control function of precise temperature acquisition in multiple regions, segmented heating and dynamic cooling regulation in the kettle.

Description

Technical Field

[0001] This application belongs to the field of temperature control technology for chemical equipment, specifically relating to a temperature control system for an esterification reactor. Background Technology

[0002] Esterification is a common reaction type in chemical production, typically requiring specific temperature conditions. The precision of temperature control directly affects the efficiency, product quality, and safety of the esterification reaction. As the core equipment in the esterification reaction, the performance of the temperature control system in the esterification reactor is crucial.

[0003] Existing esterification reactor temperature control systems mostly use a single temperature sensor to collect the reactor's internal temperature, which only reflects localized temperature conditions and cannot accurately capture temperature differences at different axial locations within the reactor, easily leading to temperature control blind spots. Simultaneously, heating devices are mostly of a single, integrated structure, unable to provide segmented heating control based on the temperature requirements of different areas within the reactor, resulting in energy waste. Cooling systems typically have fixed coolant flow rates, unable to dynamically adjust according to temperature changes, leading to slow temperature control response and low accuracy, failing to meet the demands of precision production. Furthermore, some temperature control systems lack effective alarm mechanisms, failing to promptly alert personnel when temperature anomalies occur, posing safety hazards.

[0004] To address the aforementioned issues, there is an urgent need to develop an esterification reactor temperature control system capable of precise monitoring of the reactor temperature, segmented temperature control, and rapid response, in order to improve the stability and safety of the esterification reaction. Utility Model Content

[0005] The technical problem to be solved by this application is to overcome the shortcomings of the prior art and provide an esterification reactor temperature control system that can realize the temperature control function of accurate acquisition of multi-zone temperature, segmented heating and dynamic cooling adjustment inside the reactor.

[0006] The technical solution adopted by this application to solve its existing problems is: An esterification reactor temperature control system includes an esterification reactor body, a temperature acquisition unit, a heating unit, a cooling unit, and a central control unit; The temperature acquisition unit includes multiple temperature sensors distributed along the axial direction of the esterification reactor body, and the detection end of the temperature sensor extends into the interior of the esterification reactor body. The heating unit includes a heating jacket sleeved on the outside of the esterification reactor body, and an electric heating wire is provided inside the heating jacket. The electric heating wire is segmented along the axial direction of the heating jacket. The cooling unit includes a cooling coil embedded in the side wall of the esterification reactor body and a coolant circulation assembly communicating with the cooling coil. The cooling coil is spirally distributed along the axial direction of the esterification reactor body. The central control unit is electrically connected to the temperature acquisition unit, the heating unit, and the cooling unit respectively. The central control unit has a preset temperature threshold range. The central control unit controls the start and stop of the electric heating wire in the corresponding section and the operation status of the coolant circulation component according to the temperature data collected by the temperature sensor.

[0007] Furthermore, the temperature sensor is a platinum resistance temperature sensor, and the distance between two adjacent temperature sensors is 30-50cm. The temperature sensor is connected to the esterification reactor body through a sealing flange.

[0008] Furthermore, the heating jacket is provided with an insulation layer on the outside, which is made of aluminum silicate cotton material and has a thickness of 5-10cm.

[0009] Furthermore, the coolant circulation assembly includes a coolant tank, a circulation pump, and a flow regulating valve. The outlet of the coolant tank is connected to the inlet of the circulation pump via a pipe, the outlet of the circulation pump is connected to the inlet of the flow regulating valve via a pipe, the outlet of the flow regulating valve is connected to the inlet of the cooling coil, and the outlet of the cooling coil is connected to the inlet of the coolant tank. Both the circulation pump and the flow regulating valve are electrically connected to the central control unit.

[0010] Furthermore, it also includes an alarm unit, which is electrically connected to the central control unit. When the temperature data collected by the temperature sensor exceeds the temperature threshold range, the central control unit controls the alarm unit to issue an alarm signal.

[0011] Furthermore, the alarm unit includes an audible and visual alarm, which is mounted on the housing of the central control unit.

[0012] Furthermore, the central control unit includes a PLC controller and a touch screen electrically connected to the PLC controller, the touch screen being used to display temperature data and set temperature threshold ranges.

[0013] Compared with the prior art, the beneficial effects of this application are as follows: (1) By using multiple temperature sensors distributed along the axial direction of the esterification vessel body, temperature data at different heights inside the vessel can be collected in real time, avoiding the temperature control blind zone caused by a single sensor and providing a reliable basis for precise temperature control.

[0014] (2) The electric heating wires in the heating jacket are arranged in sections along the axial direction. The central control unit can control the start and stop of the electric heating wires according to the temperature data of the corresponding sections to achieve targeted heating and effectively reduce energy waste.

[0015] (3) The spiral distribution of the cooling coil ensures uniform cooling. The flow regulating valve in the coolant circulation assembly can dynamically adjust the coolant flow under the control of the central control unit, improve the temperature control response speed, and ensure that the temperature is stable within the set range.

[0016] (4) Set up an alarm unit to promptly issue an audible and visual alarm signal when the temperature exceeds the threshold, so that staff can quickly handle abnormal situations and reduce production risks.

[0017] (5) The system operating status can be viewed intuitively through the touch screen, which facilitates parameter setting and improves the ease of operation. Attached Figure Description

[0018] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a cross-sectional view of the esterification reactor in a temperature control system for an esterification reactor according to this application. Figure 2 This is a system diagram of the cooling unit in the temperature control system of an esterification reactor according to this application.

[0020] In the diagram: 1-Esterification reactor body, 2-Temperature sensor, 3-Heating jacket, 4-Electric heating wire, 5-Cooling coil, 6-Coolant storage tank, 7-Circulation pump, 8-Flow regulating valve, 9-Cooler. Detailed Implementation

[0021] The attached figure shows a preferred embodiment of the esterification reactor temperature control system. The present application will be further described in detail below with reference to the attached figure.

[0022] Depend on Figure 1 as well as Figure 2 As shown, an esterification reactor temperature control system includes an esterification reactor body 1, a temperature acquisition unit, a heating unit, a cooling unit, a central control unit, and an alarm unit.

[0023] The temperature acquisition unit includes four platinum resistance temperature sensors 2 distributed along the axial direction of the esterification reactor body 1. The distance between two adjacent temperature sensors 2 is 30-50cm, preferably 40cm. The temperature sensors 2 are connected to the esterification reactor body 1 through a sealing flange, and their probes extend into the interior of the esterification reactor body 1 to collect temperature data at different heights inside the reactor.

[0024] The heating unit includes a heating jacket 3 fitted on the outside of the esterification kettle body 1. The heating jacket 3 is provided with 4 sections of electric heating wire 4 that correspond one-to-one with the temperature sensor 2. The electric heating wire 4 is arranged in sections along the axial direction of the heating jacket 3. The outside of the heating jacket 3 is provided with an aluminum silicate cotton insulation layer with a thickness of 8cm.

[0025] The cooling unit includes a cooling coil 5 embedded in the side wall of the esterification reactor body 1 and a coolant circulation assembly connected to the cooling coil 5. The cooling coil 5 is spirally distributed along the axial direction of the esterification reactor body 1. The coolant circulation assembly includes a coolant storage tank 6, a circulation pump 7, a flow regulating valve 8, and a cooler 9. The outlet of the coolant storage tank 6 is connected to the inlet of the circulation pump 7 through a pipe. The outlet of the circulation pump 7 is connected to the inlet of the flow regulating valve 8 through a pipe. The outlet of the flow regulating valve 8 is connected to the inlet of the cooling coil 5. The outlet of the cooling coil 5 is connected to the inlet of the coolant storage tank 6. The cooler 9 is installed between the cooling coil 5 and the coolant storage tank 6 to form a closed-loop circulation system.

[0026] Cooler 9 is an air cooler with a temperature sensor or temperature control switch at its inlet. Cooler 9 will only turn on automatically when the temperature of the liquid discharged from the cooling coil 5 into the cooler 9 reaches or exceeds the threshold.

[0027] The central control unit includes a PLC controller, model S7-200, and a touch screen that is electrically connected to the PLC controller. The PLC controller is electrically connected to the temperature sensor 2, the electric heating wire 4, the circulating pump 7, and the flow regulating valve 8. The touch screen is used to display temperature data, system operating status, and set temperature threshold range.

[0028] The alarm unit is an audible and visual alarm, which is installed on the housing of the central control unit and electrically connected to the PLC controller.

[0029] The working process of this embodiment is as follows: S01. Parameter setting: The operator inputs the temperature threshold range required for the esterification reaction (e.g., 80-100℃) to the PLC controller through the touch screen.

[0030] S02. Temperature Acquisition: Four temperature sensors 2 collect temperature data at different heights inside the esterification reactor body 1 and transmit the data to the PLC controller in real time.

[0031] S03. Heating Control: The PLC controller compares the collected temperature data with a preset threshold. If the temperature of a certain section is below 80℃, it controls the corresponding heating wire 4 to start and heat the area. When the temperature reaches 100℃, it controls the corresponding heating wire 4 to stop heating.

[0032] S04. Cooling control: If the temperature of a certain section is higher than 100℃, the PLC controller controls the circulation pump 7 to start and adjusts the opening of the flow regulating valve 8 according to the degree of temperature exceeding the threshold to increase the coolant flow rate and cool the vessel body through the cooling coil 5. When the temperature drops to the range of 80-100℃, the flow regulating valve 8 is adjusted to reduce the opening or the circulation pump 7 is controlled to stop.

[0033] S05. Alarm prompt: When the temperature data collected by any temperature sensor 2 exceeds the range of 80-100℃ for 5 seconds, the PLC controller controls the audible and visual alarm to issue an audible and visual alarm signal to remind the staff to check and handle it in time.

[0034] S06. Status Monitoring: Staff can view the measured values ​​of each temperature sensor 2, the start / stop status of the electric heating wire 4, the operating status of the circulating pump 7, and the opening degree of the flow regulating valve 8 in real time through the touch screen, which facilitates the monitoring and adjustment of the system.

[0035] This embodiment achieves precise temperature control within the esterification reactor by combining segmented heating with dynamic cooling adjustment. The temperature control accuracy can reach ±0.5℃, effectively improving the stability of the esterification reaction and the quality of the product, while reducing energy consumption and enhancing production safety.

[0036] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A temperature control system for an esterification reactor, characterized in that: It includes the esterification reactor body (1), temperature acquisition unit, heating unit, cooling unit and central control unit; The temperature acquisition unit includes multiple temperature sensors (2) distributed along the axial direction of the esterification vessel body (1), and the detection end of the temperature sensor (2) extends into the interior of the esterification vessel body (1). The heating unit includes a heating jacket (3) sleeved on the outside of the esterification vessel body (1), and an electric heating wire (4) is provided inside the heating jacket (3). The electric heating wire (4) is arranged in segments along the axial direction of the heating jacket (3). The cooling unit includes a cooling coil (5) embedded in the side wall of the esterification reactor body (1) and a coolant circulation assembly connected to the cooling coil (5). The cooling coil (5) is spirally distributed along the axial direction of the esterification reactor body. The central control unit is electrically connected to the temperature acquisition unit, the heating unit, and the cooling unit respectively. The central control unit has a preset temperature threshold range. The central control unit controls the start and stop of the electric heating wire in the corresponding section and the operation status of the coolant circulation component according to the temperature data collected by the temperature sensor.

2. The esterification reactor temperature control system according to claim 1, characterized in that: The temperature sensor (2) is a platinum resistance temperature sensor. The distance between two adjacent temperature sensors (2) is 30-50cm. The temperature sensor (2) is connected to the esterification reactor body (1) through a sealing flange.

3. The esterification reactor temperature control system according to claim 1, characterized in that: The heating jacket is provided with an insulation layer on the outside. The insulation layer is made of aluminum silicate cotton material and has a thickness of 5-10cm.

4. The esterification reactor temperature control system according to claim 1, characterized in that: The coolant circulation assembly includes a coolant tank (6), a circulation pump (7), and a flow regulating valve (8). The outlet of the coolant tank (6) is connected to the inlet of the circulation pump (7) via a pipe. The outlet of the circulation pump (7) is connected to the inlet of the flow regulating valve (8) via a pipe. The outlet of the flow regulating valve (8) is connected to the inlet of the cooling coil (5). The outlet of the cooling coil (5) is connected to the inlet of the coolant tank (6). Both the circulation pump (7) and the flow regulating valve (8) are electrically connected to the central control unit.

5. The esterification reactor temperature control system according to claim 1, characterized in that: It also includes an alarm unit, which is electrically connected to the central control unit. When the temperature data collected by the temperature sensor exceeds the temperature threshold range, the central control unit controls the alarm unit to issue an alarm signal.

6. The esterification reactor temperature control system according to claim 5, characterized in that: The alarm unit includes an audible and visual alarm, which is mounted on the housing of the central control unit.

7. The esterification reactor temperature control system according to claim 1, characterized in that: The central control unit includes a PLC controller and a touch screen electrically connected to the PLC controller. The touch screen is used to display temperature data and set temperature threshold ranges.

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