Weekly topic: What should be the temperature of the Niru fluidized bed, and how to maintain a constant temperature? Participants will receive rewards of 10~30 wealth points!
Thread Content
First, I accept that the temperature of the fluidized bed should be kept at around 55–60°C; a too low temperature makes it difficult to maintain control, and it can lead to excessive moisture levels. Through the circulation of a hot water pump, about 1/3 of the hot water passes through a steam heat exchanger to maintain a constant temperature; this temperature is controlled based on feedback from temperature probes located within the fluidized bed.
What should be the temperature control for the Niru fluidized bed, and how can the temperature be kept constant?
What should be the temperature control for the Niru fluidized bed? The inlet temperature of the hot air should be <120°C, the outlet temperature of the hot air should be <70°C, the temperature of the hot water should be <95°C, the humidity of the material entering the bed should be <27%, the humidity of the material exiting the bed should be <0.5%, the temperature of the material as it enters the bed should be between 20–80°C, and the temperature of the material as it exits the bed should be <55°C. How to keep the temperature constant? Control heat intake.
As far as I remember, Niro’s dryers consist of two sections, with plate heat exchangers. I don’t know if there have been any changes now. The thermometer is the most important instrument for dryness control, and it is necessary to ensure its accurate operation. There should be several temperature measurement points on the drying bed, and the temperature ranges for these different points vary. Bed pressure is also relevant; different bed pressures result in varying amounts of time that the product stays inside the bed. Wait...... So, to determine what the temperature should be and how to keep it constant, it is first necessary to have clear knowledge of the relevant parameters in order to specify exactly how to control that temperature.
It is necessary to ensure an adequate flow rate of water or circulation volume; the temperature inside the bed is adjusted by regulating the temperature of the hot water (it is not effective to control the bed temperature by adjusting the water flow rate). A mathematical model is developed based on parameters such as the amount of material added, moisture content, resin type, and air humidity, and this model is then adjusted according to the actual conditions of production.
I agree with the person above; since the operating conditions vary, it is necessary to take into account parameters such as the amount of material added, moisture content, resin type, and air humidity, and to gain experience through actual operation.