Is it feasible for high-tower compound fertilizers to do without a finished product cooling device?
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It is understood that after granulation in the high tower, the finished compound fertilizer pellets need to be sent to a cooling device for temperature reduction before being packaged. May I ask: Is it feasible if a finished product cooling device is not required?
What is the typical temperature of the finished compound fertilizer pellets that come out from the bottom of the granulation tower?
Production is definitely impossible in the hot and humid weather of summer, and even if production does take place, clumping occurs
The temperature of the finished compound fertilizer pellets coming out of the bottom of the granulation tower is generally around 40-50°C. I believe cooling is necessary, as applying the coating agent directly without cooling will affect the quality of the spraying process as well as the quality of the final product.
It must be cooled in summer, otherwise it will clump together and make you cry: lol
In summer, enterprises with good conditions and high efficiency still need to be equipped with refrigeration dehumidification units
“What is the purpose of installing a refrigerated dehumidification unit? Where is this refrigerated dehumidification unit located?
Gas entering the cooling drum or air entering the tower
If it is winter in the north, there is no need at all for a cooler; we have made changes such that the products coming down from the tall tower are sent to the packaging machine via conveyor belts and packaged directly, thereby eliminating the use of the cooler and saving a significant amount of electrical energy. But it won’t work in summer, as the temperature of the finished product doesn’t drop low enough.
The dry cold air produced by the freeze-dehumidification units is used to cool the fertilizer by being blown into the cooling drums or fluidized beds. Henan Caixin Chemical’s 200,000-ton capacity towers utilize vibration fluidized bed dryers in combination with freeze-air dehumidifiers. Shanxi Tianji Chemical Group’s 200,000-ton capacity nitro compound fertilizer production facilities also make use of vibration fluidized bed dryers along with freeze-air dehumidifiers for cooling. While this approach does provide an effective way of supplying air to the towers, it comes with high operating and investment costs, making it uneconomical. The volume of air required is very large; for a tower with a capacity of 200,000 tons per year, it is estimated that 200,000 to 300,000 cubic meters per hour of cold air is needed for cooling purposes
In fact, forced ventilation is not required inside the tower; natural wind can be cooled at the tower’s air doors. This reduces temperature and humidity while saving costs.