TEMPERATURE CONTROL SYSTEM
化工温度控制系统是通过传感器、控制器和执行器组成的闭环系统，精准调节反应釜、蒸馏塔、换热器等设备的工艺温度，确保化学反应效率、产品质量及生产安全。核心要求包括高精度（±0.5°C）、快速响应和抗干扰能力。
化工温度控制系统是通过传感器、控制器和执行器组成的闭环系统，精准调节反应釜、蒸馏塔、换热器等设备的工艺温度，确保化学反应效率、产品质量及生产安全。核心要求包括高精度（±0.5°C）、快速响应和抗干扰能力。
English:
A chemical industry temperature control system is a closed-loop system comprising sensors, controllers, and actuators to precisely regulate process temperatures in reactors, distillation columns, heat exchangers, etc. It ensures chemical reaction efficiency, product quality, and operational safety. Key requirements include high precision (±0.5°C), rapid response, and disturbance rejection.
Layer | Components | Function |
Field Layer | - RTD/Thermocouples | Real-time temperature sensing (e.g., Pt100, Type K) |
- Heating/Cooling Actuators | Steam valves, electric heaters, cooling water valves | |
Control Layer | - PID Controllers (in DCS/PLC) | Execute control algorithms (e.g., cascade, split-range control) |
- Safety Instrumented System (SIS) | Emergency shutdown on overtemperature (IEC 61511 compliant) | |
Supervisory Layer | - HMI Stations | Display trends, setpoint adjustment, alarm management |
- Historian | Store temperature data for auditing & optimization |
English:
High-Precision Control: PID auto-tuning for non-linear processes (e.g., exothermic phases in polymerization).
Multi-variable Coordination: Integrated control with pressure/flow (e.g., temperature-reflux ratio optimization in distillation).
Safety Redundancy: Dual-sensor voting + independent SIS protection layer.
Corrosion Resistance: Hastelloy sensors, PTFE seals for corrosive environments.
Typical Applications
Process Unit | Control Objective | Technical Solution |
Reactor Synthesis | Maintain exothermic reaction temperature | Cascade control: Master temp + Slave cooling flow |
Distillation Column | Stable tray temperature gradient | Split-range control (steam valve + condenser valve) |
Spray Drying | Outlet material temp ≤ threshold | Feedforward-feedback control (inlet air temp compensation) |
Feature | Chemical Temp Control | Generic PLC Temp Control | Building HVAC System |
Precision | ±0.1~0.5°C | ±1~2°C | ±1~5°C |
Response Speed | Milliseconds | Seconds | Minutes |
Safety Level | SIL 2/3 (IEC 61511) | SIL 1 | No certification |
Environment | Explosion-proof/Corrosion-resistant | Industrial (IP65) | Standard |
AI Predictive Control: Deep learning forecasts thermal disturbances (e.g., feed composition changes) for proactive valve adjustment.
Wireless Sensor Networks: Passive RFID temperature tags in complex reactors.
Energy Integration: Dynamic coupling with waste heat recovery (e.g., heat-integrated distillation).