Flash drying apparatus and method of producing particles

Patent metadata

Field	Value
Publication number	US-12358186-B2
Application number	US-202217877674-A
Country	US
Kind code	B2
Filing date	Jul 29, 2022
Priority date	Aug 2, 2021
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

A loop-type flash drying apparatus configured to dry an object to be treated with a gas by supplying the object into a gas stream circulating in a loop-type drying pipe, wherein the loop-type flash drying apparatus includes: (i) a loop-type drying pipe; (ii) a feeding port configured to feed an object to be treated into the drying pipe; (iii) a second blowing port configured to blow a gas into the drying pipe; (iv) a discharge port configured to discharge the object from the drying pipe; (v) a discharge region formed by the drying pipe and the discharge port; and (vi) a first blowing port through which a gas for accelerating a gas flowing in the discharge region is linearly blown toward the discharge region.

First claim

What is claimed is:

1. A loop-type flash drying apparatus configured to dry an object to be treated with a gas by supplying the object into a gas stream circulating in a loop-type drying pipe,
wherein the loop-type flash drying apparatus comprises:
(i) a loop-type drying pipe;
(ii) a feeding port configured to feed the object to be treated into the drying pipe;
(iii) a second blowing port configured to blow the gas into the drying pipe;
(iv) a discharge port configured to discharge the object from the drying pipe;
(v) a discharge region formed by the drying pipe and the discharge port; and
(vi) a first blowing port through which an accelerating gas for accelerating the gas flowing in the discharge region is linearly blown toward the discharge region, and

wherein a cross-sectional area A (m 2 ) of the drying pipe and an area B (m 2 ) of the first blowing port have a relationship of 0.10<B/A<0.60.

2. The loop-type flash drying apparatus according to claim 1 , wherein the first blowing port and the discharge port are arranged at positions connected by a straight line in the drying pipe.

Assignees

• Canon Kk

Inventors

• Asaoka Junya
• Tsujino Takeshi
• Inoue Koki
• Amano Shota
• Kobayashi Masahiro

Classifications

• F26B21/20

  Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure · CPC title

• F26B21/37

  Velocity of flow; Quantity of flow · CPC title

• F26B17/105

  the shaft or duct, e.g. its axis, being other than straight, i.e. curved, zig-zag, closed-loop, spiral · CPC title

• F26B17/107

  pneumatically inducing within the drying enclosure a curved flow path, e.g. circular, spiral, helical; Cyclone or Vortex dryers (swirl or curved flow path induced mechanically, i.e. by rotating element F26B3/0923) · CPC title

• B29B9/16

  Auxiliary treatment of granules · CPC title