METHOD FOR PROCESSING PARTICLES AND A DEVICE FOR PROCESSING

Claims

1. A method for processing particles, comprising: a grain particle conditioning step (sc) comprising supplying a preheating gas to the grain particles from below to form a fluidized bed of the grain particles and preheating the grain particles in the fluidized bed; and a granulation step (gr) consisting of applying a coating to the surface of the grain particles heated in the grain particle conditioning step (sc) with a coating substance in a high temperature atmosphere to carry out granulation, wherein the grain particles are urea particles, the coating substance is urea, the preheating gas has a temperature of 80°C to 140°C, and the gas that forms the high-temperature atmosphere at the granulation stage (gr) has a temperature of 80°C to 140°C.

2. The method for processing particles according to claim 1, wherein the preheating gas has the same temperature as the temperature of the atmosphere at the granulation stage (gr).

3. The method for processing particles according to claim 1, wherein the preheating gas has a temperature of 90°C to 120°C, and the gas that forms the high temperature atmosphere in the granulation step (gr) has a temperature of 95°C to 120°C.

4. A device for processing particles, comprising: a grain particle conditioning device (SC) for supplying a preheating gas to the grain particles from below to form a fluidized bed of the grain particles and preheating the grain particles in the fluidized bed; and a granulation device (GR) for coating the surface of the grain particles heated by the grain particle conditioning device (SC) with a coating substance in a high temperature atmosphere to carry out granulation, wherein the grain particles are urea particles, the coating substance is urea, the preheating gas has a temperature of 80°C to 140°C, and the gas that forms the high-temperature atmosphere in the granulation device (GR) has a temperature of 80°C to 140°C.

5. A device for processing particles with a device (SC / GR) for conditioning and granulating particles of grains, comprising: a grain particle conditioning zone (SCZ) in which preheating gas is supplied to the grain particles from below to form a fluidized bed of the grain particles and preheat the grain particles in the fluidized bed; and a granulation zone (GRZ) in which the surface of the grain particles heated in the grain particle conditioning zone (SCZ) is coated with a coating substance in a high temperature atmosphere to perform granulation, wherein the grain particles are urea particles, the coating substance is urea, the preheating gas has a temperature of 80°C to 140°C, and the gas that forms the high-temperature atmosphere in the granulation zone (GRZ) has a temperature of 80°C to 140°C.

6. A method for improving an existing particle processing device with a granulation device (GR) for applying a coating substance grain to the surface of particles under high-temperature atmosphere conditions to carry out granulation, in which adding a grain particle conditioning device (SC) to the existing particle processing apparatus for supplying a preheating gas to the grain particles from below to form a fluidized bed of the grain particles and preheating the grain particles in the fluidized bed, so that the grain particles after being heated by the grain particle conditioning device (SC) are coated with a coating agent in a high-temperature atmosphere to perform granulation in the granulation device (GR); or replacing the granulation device (GR) with a device (SC / GR) for conditioning and granulating grain particles, including a grain particle conditioning zone (SCZ) in which a preheating gas is supplied to the grain particles from below to form a fluidized bed of the grain particles and preheat the grain particles in the fluidized bed, and a granulation zone (GRZ) in which the surface of the grain particles heated in the grain particle conditioning zone (SCZ) is coated with a coating substance in a high-temperature atmosphere to perform granulation, thus, the grain particles after heating in the grain particle conditioning zone (SCZ) are coated with a coating substance in a high-temperature atmosphere to perform granulation in the granulation zone (GRZ), In this case, the grain particles are urea particles, the coating substance is urea, the preheating gas has a temperature of 80°C to 140°C, and the gas that forms the high temperature atmosphere has a temperature of 80°C to 140°C.