Title:
EFFICIENT STERILIZATION METHOD USING VACUUM CIRCULATING OZONE
Document Type and Number:
WIPO Patent Application WO/2021/057379
Kind Code:
A1
Abstract:
A sterilization method using vacuum circulating ozone, comprising the following steps: activating some sleeping bacteria or germinating some sleeping spores inside a test product; pouring the dry test product into a sterilization rotating drum (6), and heating same in a sealed manner and vacuumizing to remove air and moisture from pores of the test product; after humidifying and pressurizing ozone, directing same into a temperature-controlled buffer drum (5) to cool to 25±2°C, and condensing surplus moisture; filling the sterilization rotating drum (6) with high-pressure ozone saturated with moisture so as to perform sterilization by rotation, and at the same time, discharging, at a rate lower than an air inlet rate and at the other side of the sterilization rotating drum (6), the ozone after performing sterilization; maintaining the pressure of the sterilization rotating drum (6) at 1.1-5 atm, introducing the discharged ozone into an ozone maker (2) again after being condensed and dried, and producing, in a circulating manner, ozone having a higher concentration; the ozone entering the sterilization rotating drum (6) again for continuous and circulating sterilization for 15-120 minutes, until the sterilization ends. The method enables ozone to enter tiny pores on each side of a test product for overall sterilization, has high sterilization efficiency and a good effect, and is suitable for a multi-layer-stacked test product such as a sheet product, a granular product, or a powder product.
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Inventors:
HWANG KAINENG (CN)
Application Number:
PCT/CN2020/111977
Publication Date:
April 01, 2021
Filing Date:
August 28, 2020
Export Citation:
Assignee:
HWANG KAINENG (CN)
International Classes:
A23L5/20
Foreign References:
| CN110720582A | 2020-01-24 | |||
| CN211703466U | 2020-10-20 | |||
| CN105012978A | 2015-11-04 | |||
| US7582257B2 | 2009-09-01 | |||
| CN102973961A | 2013-03-20 | |||
| CN104906607A | 2015-09-16 | |||
| CN107789644A | 2018-03-13 | |||
| US5049320A | 1991-09-17 | |||
| US5069880A | 1991-12-03 |
Other References:
DUFRESNE S. ET AL.: "Ozone Sterilization:Another Option for Healthcare in the 21st Century", 《AM J INFECT CONTROL》, vol. 32, no. 3, 31 December 2004 (2004-12-31), DOI: 20201116155931Y
Attorney, Agent or Firm:
FU ZHOU GULOU JING HUA PATENT AGENCY (GP.) (CN)
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