The cooling of granular materials is an indispensable process in the granulation section. counter currentcoolerIt can cool the granular material with a temperature of 70 ℃ to 90 ℃ from the granulator to a temperature slightly higher than room temperature of 3 ℃ to 5 ℃, and reduce it to a safe moisture content (≤ 12.5%), which facilitates the transportation, storage, and preservation of the granular material.
Octagonal counter current typecoolerThe output varies depending on the model, and it can adapt to feed mills of various sizes.
Performance characteristics
counter currentcoolerIt is currently a popular onecoolerIt is utilizingcountercurrent coolingThe principle is to cool high-temperature and high humidity granular materials, that is, the ambient cold air passes vertically through the material layer, first comes into contact with the cold material, and the gradually heated hot air comes into contact with the hot material. The direction of the air flow is opposite to that of the material flow, so as to gradually cool the granular materials in the forward direction, which can avoid other problemscoolerThe cracking of particle surfaces caused by the rapid cooling of particles due to direct contact between cold air and high-temperature particles, as cold air enters from the bottom in all directionscoolerDue to its large air intake area and high utilization rate of cold air, the cooling effect is significant. Additionally, the machine has low energy consumption and is easy to operate, hence the counterflow typecoolerIt is superior to previous vertical and horizontal modelscoolerUpdated and upgraded products.

The counter current cooler adopts advanced counter current cooling principle and adopts a discharge fence type discharge mechanism that performs reciprocating linear motion. The discharge is smooth, the discharge volume is uniform, and the octagonal cooling chamber removes the cooling dead angle, which is conducive to the cooling treatment of materials. The rotating sprayer ensures that the materials are fully and thoroughly cooled and can significantly reduce the breakage rate. The fabric range is adjustable and the power consumption is small. The upper part of the discharge mechanism is equipped with several pressure reducing plates, which can greatly improve the workload of the discharge mechanism, reduce deformation, and extend the service life of components. The transmission device uses a reduction motor to drive the eccentric shaft, which is stable, reliable, and has low noise. It is easy to install and maintain. After cooling, the material temperature is not higher than room temperature+5 ℃, and the precipitation rate is not lower than. 3.8%, extended the storage time of high-quality pellet feed, A maintenance door is set up on the front of the equipment for easy daily maintenance and repair. Several observation windows are opened on the side and top cover to facilitate the observation of equipment operation status.

Main structure and working principlecountercurrenttypecoolerIt mainly consists of a rotating closed air feeder, an air outlet top cover, a diamond shaped disperser, a cooling box, upper and lower material level devices, a deceleration brake motor, an eccentric transmission slide valve discharge mechanism, a fixed frame adjustment device, a collection hopper, a frame, and a suction system. The working process involves high-temperature and high humidity granular materials coming out of the granulator, which are uniformly stacked in the cooling box through a rotating closed air feeder and a diamond shaped disperser. Cold air enters from the gap between the bottom of the slide valve discharge mechanism below the cooling box and the upper part of the collection hopper in all directionscoolerAnd it vertically passes through the material layer to exchange heat with the wet and hot particles, and then is sucked out by the suction system to cool the particles. The cooling time is controlled by the position of the upper and lower material levels. When the particle layer reaches the upper material level, the motor is turned on to start discharging. When the particle layer is lower than the lower material level, the motor stops rotating and discharging stops. After the motor stops running, the relative position between the movable frame and the fixed frame in the slide valve discharge mechanism is controlled by the travel switch through the brake motor, which ensures that there is no leakage after stopping the discharge. The slide valve discharge mechanism is installed at the bottom of the box, and the movable frame is moved back and forth by the deceleration brake motor through the eccentric mechanism, changing the relative position between the movable frame and the fixed frame, so that the granular material is discharged from the box, and finally discharged from the collection hopper outside the machine. Logistics and airflow flow: Materials move from top to bottom, while airflow enters from the bottom of the cooling box, exits through the top air outlet, passes through the air duct and dust collector, and is finally discharged through the fan. The wind net system is an essential equipment for providing cooling air source, consisting of a dust collector, a shut-off fan, a fan, and pipelines. The fans are configured behind the dust collector and connected by air ducts. The length of the air duct should be shortened as much as possible, especially in the horizontal section, and the number of bends should be minimized as much as possible. The pipe wall needs to be wrapped with insulation material to prevent condensation water and the resulting powder from blocking the air duct. An air volume adjustment device should be installed on the pipeline to regulate the size of the air volume. Fan selection fan size according tocoolerDepending on the output,

The air flow parameters are 28-34m3/t.min

Cooling time min shall not be less than 6-10

After cooling, the temperature of the material should not exceed room temperature by+3-5 ℃

Air suction volume m3/min 34 Cooling time min not less than 6-10

After cooling, the temperature of the material should not exceed room temperature by+3-5 ℃