How to control the drying temperature of the belt dryer

The method of controlling the drying temperature of the belt dryer mainly involves the power adjustment of the heating equipment, the utilization of the heat exchanger and the control of the circulating fan. The following is a detailed description of these control methods:

I. Power adjustment of heating equipment
Usually, the temperature of the belt dryer can be adjusted by controlling the power of the heating equipment. Heating equipment can be electric heating, coal-fired hot air heating, steam heating or gas heating. When it is necessary to increase the drying temperature, increase the power of the heating equipment; when it is necessary to reduce the drying temperature, reduce the heating power. This adjustment is flexible and easy to control, to ensure that the drying temperature fluctuations in the set range.

Second, heat exchanger utilization
The heat exchanger in the belt dryer plays the role of heating and transferring heat. By adjusting the working condition of the heat exchanger, precise control of the drying temperature can be realized. For example, in the initial drying stage, due to the high water content of the material, poor permeability, need to use a higher drying temperature, at this time you can increase the heating power of the heat exchanger, increase the temperature of the drying gas. In the subsequent stage, with the reduction of water content of the material, you can properly reduce the heating power of the heat exchanger to avoid excessive drying of the material.

Third, circulating fan control
Circulating fan plays the role of circulating hot air into the drying unit in the belt dryer. By adjusting the rotational speed of the circulating fan or the number of openings, the flow rate of hot air and flow rate can be changed, so as to realize the regulation of the drying temperature. For example, when the drying temperature needs to be increased, the rotational speed of the circulating fans can be increased or more fans can be turned on to increase the flow rate and flow velocity of the hot air and improve the drying efficiency. Conversely, when the drying temperature needs to be lowered, the rotational speed of the circulating fan can be lowered or part of the fan can be turned off.

Fourth, temperature monitoring and feedback
In order to ensure accurate control of the drying temperature, the belt dryer is usually equipped with temperature monitoring devices. These devices can monitor the temperature in the drying unit in real time and feedback the data to the control system. According to the feedback data, the control system automatically adjusts the power of the heating equipment, the working status of the heat exchanger and the rotational speed of the circulating fan and other parameters to ensure that the drying temperature fluctuates within the set range.

V. Precautions
When adjusting the drying temperature, attention should be paid to avoid the material being deteriorated or damaged due to too high temperature. Therefore, when setting the temperature, it should be reasonably selected according to the nature of the material and drying requirements.
The adjustment of drying temperature should be coordinated with the thickness of material spreading, mesh belt running speed and other parameters to ensure the stability and high efficiency of the drying process.
Regular maintenance and repair of the belt dryer to ensure that the heating equipment, heat exchanger and circulating fan and other components of the normal operation and efficient work.
In summary, the method of belt dryer control drying temperature mainly includes heating equipment power adjustment, heat exchanger utilization, circulating fan control and temperature monitoring and feedback. Through the comprehensive use of these methods, the precise control of drying temperature can be realized to ensure the stability and high efficiency of the drying process.