US 11,988,449 B2
Spray drying apparatus with a plenum chamber below a perforated bottom of a spray drying chamber
Mads Lund Steffensen, Søborg (DK); Kristian Mark Ingvorsen, Søborg (DK); and Henrik Schwartzbach, Søborg (DK)
Assigned to GEA PROCESS ENGINEERING A/S, Søborg (DK)
Appl. No. 17/442,476
Filed by GEA Process Engineering A/S, Søborg (DK)
PCT Filed Mar. 25, 2019, PCT No. PCT/DK2019/050103
§ 371(c)(1), (2) Date Sep. 23, 2021,
PCT Pub. No. WO2020/192852, PCT Pub. Date Oct. 1, 2020.
Prior Publication US 2022/0163258 A1, May 26, 2022
Int. Cl. B01D 1/18 (2006.01); F26B 3/12 (2006.01); F26B 17/04 (2006.01); F26B 25/10 (2006.01)
CPC F26B 3/12 (2013.01) [B01D 1/18 (2013.01); F26B 17/04 (2013.01); F26B 25/10 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A spray drying apparatus comprising:
a spray drying chamber;
a liquid feed atomizer;
a drying gas disperser;
a perforated bottom;
at least one plenum chamber below the perforated bottom; and
an outlet of said plenum chamber,
wherein said plenum chamber has
a perforated ceiling, which is provided by an underside of said perforated bottom, and
a bottom,
wherein at least one guide plate is provided in the at least one plenum chamber to direct gas, which is passing through the perforated bottom into the plenum chamber, towards the bottom of the plenum chamber,
said at least one guide plate having a lower edge and said at least one guide plate having a longitudinal extent in a longitudinal direction of said at least one guide plate, said at least one guide plate extending across, and thereby at an angle larger than zero relative to an outlet direction towards the outlet,
said at least one guide plate throughout the longitudinal extent thereof extending on average down to at least half-way between the perforated ceiling and the bottom of the plenum chamber.