1. Thermal efficiency monitoring
Thermal efficiency is an important indicator for measuring the energy consumption of a paddle dryer. It can be calculated and monitored in the following ways:
Thermal utilization coefficient: By measuring the temperature difference between the inlet and outlet of the dryer, the amount of moisture discharged and other parameters, the heat transferred inside the dryer (Q1) is calculated, and then combined with the heat supplied to the dryer (Q2, including the heat supply of the hot air furnace, the heat transfer loss of the hot air pipeline, etc.), the thermal utilization coefficient is calculated.
Energy consumption ratio: that is, the ratio of the energy consumed per unit time to the heat required for drying the material. The lower the energy consumption ratio, the higher the energy utilization rate.
2. Steam consumption monitoring
For a paddle dryer that uses steam as a heat medium, the steam consumption can be calculated by the following steps:
Determine the material properties: including parameters such as the initial moisture content, final moisture content, and density of the material.
Calculate the heat required for drying: Calculate the heat required for material drying based on the drying temperature, pressure and material properties.
Determine the thermal efficiency of the dryer: Determine the thermal efficiency through the actual operation of the thermal parameters (such as the steam pressure and temperature at the inlet and outlet).
Calculate steam consumption: Divide the heat required for material drying by the thermal efficiency of the dryer to obtain steam consumption.
3. Intelligent control system monitoring
Modern paddle dryers are usually equipped with intelligent control systems that can monitor and record energy consumption data in real time:
PLC full-process control system: Real-time monitoring of paddle load, speed, temperature and other parameters through the sensor network, automatically adjust the operating status, and record energy consumption data at the same time.
Fault warning and data analysis: The new generation of equipment can achieve fault warning with an accuracy rate of more than 90%, and optimize energy consumption through data analysis.
4. Waste heat recovery monitoring
By installing a heat exchanger to recover exhaust heat, monitor the proportion and effect of recovered heat, and evaluate the energy saving effect.
5. Unit energy consumption cost monitoring
Evaluate the energy consumption cost by calculating the unit sludge drying cost, taking into account the operating electricity cost, steam or heat transfer oil cost, labor cost, etc.
