In the paper production process, temperature control in the drying section is critical to ensuring paper quality. The drying section heats the paper web through multiple drying cylinders, requiring precise control of each cylinder’s surface temperature to meet the drying needs of different paper weights. This solution leverages an ARM Embedded IPC, integrated with Y-AI and Y-AO boards, to achieve an efficient and flexible steam regulation system.
ARMxy Main Controller: High-performance ARM architecture processor responsible for core computations and logic control.
Y-AI Board: Collects surface temperature data from drying cylinders, supporting multi-channel analog inputs.
Y-AO Board: Outputs control signals to adjust the steam regulating valve’s opening, supporting valve position feedback.
Temperature Acquisition:
The Y-AI board connects to infrared thermometers, which output a 0-10V analog signal corresponding to a temperature range of 0-200°C.
Each drying cylinder is equipped with an independent thermometer for real-time surface temperature data collection.
The ARMxy Embedded IPC reads voltage signals via the Y-AI board, converting them to temperature values with an accuracy of ±0.5°C.
Temperature Setting and Control Logic:
Based on the paper web speed (input from external sensors or DCS system), the controller automatically calculates the temperature setpoints for each drying cylinder.
Temperature setpoints are determined using a dynamic curve algorithm, accounting for paper weight, humidity, and production speed to ensure uniform drying.
The control algorithm employs PID regulation, adjusting the steam valve opening based on real-time temperature deviations.
Steam Valve Regulation:
The Y-AO board outputs a 4-20mA current signal to control the opening of the pneumatic regulating valve.
Valve opening is proportional to steam flow, enabling precise heat supply.
The Y-AO board supports valve position feedback, forming a closed-loop control system to further enhance regulation accuracy.
Flexibility: Operators can remotely access the ARM Embedded IPC via BLRAT+OpenPLC software to modify temperature curves in real time, adapting quickly to different paper weights.
High Precision: The combination of high-accuracy Y-AI board data acquisition and Y-AO board closed-loop control ensures temperature deviations remain below ±1°C, improving paper quality consistency.
Stability: The ARMxy Embedded IPC s high-performance computing ensures real-time system response, suitable for high-speed production environments.
Scalability: The modular design of the Y-series boards facilitates system expansion or maintenance, reducing long-term operational costs.
The steam regulation system, based on the ARMxy Embedded IPC and Y-series boards, provides an efficient and precise temperature control solution for the paper machine drying section. With dynamic temperature setting, closed-loop control, and remote configuration capabilities, the system significantly enhances production efficiency and paper quality, meeting diverse production requirements.
