Spray-drying granulation apparatus
AssigneeOhkawara Kakohki Co., Ltd.
InventorsTakashi Itoh, Masayuki Serizawa, Masaaki Ohkawara
Life of this patent
Estimating the term…
Abstract
A spray-drying granulation apparatus having: a spray drying section formed in an upper position of a chamber wherein sprayed feed liquid particles are dried to powder by a hot-air; and a powder granulation section formed in a power position of the chamber, and provided with a nozzle for feeding a binder liquid. There is no need of maintaining sticky powder or completely dried powder to the lower section. The sprayed particles can be dried to powder in a wide drying range before they are granulated in the granulation section by a binder liquid. The degree of granulation can be selected as desired while preventing attachment of powder to the inner wall of the chamber due to incomplete drying.
Claims8
A spray-drying granulation apparatus comprising:
- a chamber;
- a spray drying section formed in said chamber at an upper portion thereof and including a feed liquid supply atomizer for supplying a feed liquid and means for supplying hot air to dry said feed liquid to a powder having a moisture content sufficiently low to prevent the powder from attaching to the chamber;
- and
- a fluidized-bed granulation section formed in a lower portion of said chamber for fluidizing and moving powder discharged from said spray drying section, said granulation section including a spray nozzle for feeding a binder liquid to said powder in said fluidized-bed granulation section to increase the moisture content of the powder to control granulation thereof;
- and
- means for discharging a granulated product from said fluidized-bed granulation section.
A spray-drying granulation apparatus comprising:
- a chamber;
- a spray drying section formed in said chamber at an upper portion thereof and including a feed liquid supply atomizer for supplying a feed liquid and means for supplying hot air to dry said feed liquid to a powder having a moisture content sufficiently low to prevent the powder from attaching to the chamber;
- and
- an agitating-granulation section formed in a lower portion of said chamber for agitating and moving powder discharged from said spray drying section, said granulation section including a main blade rotatable about a vertical axis, a sub-agitating blade rotatable about a horizontal axis and a spray nozzle for feeding a binder liquid to said powder in said granulation section to increase the moisture content of the powder to control granulation thereof;
- and
- means for discharging a granulated product from said agitating-granulation section.
A spray-drying granulation apparatus comprising:
- a chamber;
- a spray drying section formed in said chamber at an upper portion thereof and including a feed liquid supply atomizer for supplying a feed liquid and means for supplying hot air to dry said feed liquid to a powder having a moisture content sufficiently low to prevent the powder from attaching to the chamber;
- and
- a spouted-bed granulation section formed in a lower portion of said chamber for moving powder discharged from said spray drying section, said granulation section including a spray nozzle for feeding a binder liquid to said powder in said granulation section to increase the moisture content of the powder to control granulation thereof;
- and
- means for discharging a granulated product from said spouted-bed granulation section.
Dependencies are inferred from the claim text.