METHOD FOR PREPARING PARTICLES THROUGH SPRAY DRYING, LIQUID NITROGEN QUICK FREEZING, AND VACUUM FREEZE DRYING

WIPO Patent Application WO/2023/103153

A1

A method for preparing particles through spray drying, liquid nitrogen quick freezing, and vacuum freeze drying, comprising the following steps: a feed liquid is fed into a preheated spray tower, the feed liquid is atomized by an atomizer in the tower to form liquid droplets, dispersed air is introduced into the top of the tower, and the dispersed air disperses the atomized liquid droplets; hot air is introduced into the top of the tower, and the liquid droplets are dried by the hot air and then partially form semi-dry particles; and the semi-dry particles fall into a cooling pool below the spray tower from the bottom of the tower, and after being frozen, the particles are quickly transferred into a freeze drying device for freeze drying. Compared with direct freeze-drying of the feed liquid, the drying time is shortened by at least 30%, and the prepared particles are high in density and strong in controllability; and compared with direct spray drying, the water content of the particles prepared according to the method is reduced to about 5%, the fluidity of the particles is good, and the survival rate of the probiotic powder is improved by more than 50%.

CHEN XIAODONG (CN)
LU WENJIE (CN)
LIAO ZHENKAI (CN)

PCT/CN2022/072985

June 15, 2023

January 20, 2022

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NANTONG EAST CONCEPT NEW MAT CO LTD (CN)

B01J2/04; B01D1/18; F26B5/06

WO2021170724A1	2021-09-02
WO2019175954A1	2019-09-19

CN107109342A	2017-08-29
CN111704739A	2020-09-25
CN112754048A	2021-05-07
CN112914106A	2021-06-08
US20080155853A1	2008-07-03

KEYCOM PARTNERS, P.C. (CN)

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