What are the reasons for overflow at the head of the thio-nitrogen-phosphorus-potassium dryer?

There are many reasons for overflow at the dryer head. First, the dryer may operate at too low a speed; if this is the case, adding an inverter to the dryer allows the speed to be controlled by adjusting the frequency, which is very beneficial for production； II. The output per feeding station is too high, exceeding the capacity of the equipment; if this is the cause, it is recommended to reduce the output per station in order to find the optimal production load ； III. Scarring inside the dryer; if this is the case, it is recommended to shut down the machine for cleaning ； IV. Deterioration in production: An excessive amount of return material due to granulation or other reasons leads to a high processing load for the dryer. If this is the cause, it is recommended to reduce the production volume; once production is adjusted properly, additional units can be added ； V. An improper location of the feed inlet – either if it is too shallow or not in the right position – can lead to overflow. In such cases, it is recommended that the equipment specialist examine the situation carefully; adjusting the feed inlet properly can resolve this issue effectively.

Is it a newly installed unit or an existing one? If it’s a newly installed unit and such problems occur during testing, it might be due to the incorrect installation angle of the granulator or an insufficient height of the front baffle； If this was not a problem with older units, its appearance now may be caused by severe scarring in the granulator.

Another solution is to control the furnace temperature; additionally, installing swirl plates at the front of the dryer helps the material reach the middle part of the dryer more quickly

Thank you; the explanation was quite comprehensive. After investigating the issues that arose after parking, it was found that they were caused by internal scaling and the detachment of the circuit board

The dryer’s head must be equipped with swirl plates; without them, material will leak even at low production volumes. Moreover, the curvature and inclination angle of these swirl plates are important – if the angle is too flat, they won’t be very effective.

How many swirl plates does your dryer have, and what is their length? Our dryer has 6 of them; I’ve forgotten the exact height