Types and hazards of sticky walls in spray dryers

   Drying equipment industry has begun to enter a more mature stage of development in various fields to facilitate better meet the actual needs of users. However, the spray droplets used in the process to the surface is not dry in the case of contact with the wall before making stick to the wall. We should understand that the spray dryer appears to stick to the wall, bring us the impact.



 The type of spray dryer sticky wall:
       1, semi-wet material sticky wall: the reason is that the spray droplets in the surface drying has not reached before the wall and the wall contact, thus sticking to the wall, the location of the sticky wall is generally against the atomiser spray droplet trajectory of the plane, and the structure of the atomiser, the movement of the hot air in the tower of the state of the relevant.
       2, low melting point of the material of the hot melt adhesion wall: the reason is that the material in the corresponding temperature to reach the melting point began to dissolve and sticky, adhering to the wall of the device.
       3, dry powder surface adhesion: dry powder in a limited space in the movement there will always be some encountered on the wall, but such a sticky wall is generally not thick, as long as the light knocking can also be shocked off, a simple solution is to polish the inner wall, can be a better solution to this problem.



 Spray dryer sticky wall harm:
   1, sticky wall after the material, due to the long stay on the inner wall, may be burnt or deterioration, affecting product quality.
   2, sticky wall of the material, often lumps fall to the bottom of the tower products, so that the product sometimes can not reach the required wet content.
   3, because of the sticky wall material lumps fall into the product, so that some products need to increase the crushing process, in order to achieve the corresponding fineness.
   4, many spray dryer, in order to clean up the sticky wall materials, the need to stop spraying in the middle, which shortens the spray drying operation time.
   5, due to improper design or operation of the serious sticky wall phenomenon, but also make the spray dryer can not be put into normal production.