Title:
PRETREATMENT METHOD FOR PREPARING ULTRAPURE HYDROGEN AND ULTRAPURE OXYGEN
Document Type and Number:
WIPO Patent Application WO/2024/047478
Kind Code:
A1
Abstract:
The present invention provides a pretreatment method for preparing ultrapure hydrogen and ultrapure oxygen, comprising the steps of: introducing desalted water into the top of a storage tank through a desalted water pipeline before the desalted water enters an electrolytic bath; meanwhile, using hydrogen or oxygen as a stripping gas, introducing the stripping gas into the top of the storage tank through a gas supply pipeline, and performing atomization and stripping pretreatment on the desalted water; introducing hydrogen or oxygen into the bottom of the storage tank through the gas supply pipeline before the desalted water enters the electrolytic bath, and using hydrogen or oxygen to perform bubbling and redundant stripping on the pretreated desalted water and provide micro-positive pressure shielding; and performing water-mist separation on an exhausted gas of the storage tank, capturing moisture in supersaturated water vapor in the exhausted gas, and recycling the moisture into the storage tank. According to the pretreatment method provided by the present invention, the desalted water after the stripping enters the electrolytic bath to be decomposed into hydrogen and oxygen, and then is subjected to catalytic oxygen/hydrogen removal, condensation drainage and adsorption drying by a molecular sieve to produce ultrapure hydrogen meeting the requirements of GB/T 3634.2-2011 and ultrapure oxygen meeting the requirements of GB/T 14599-2008; moreover, the costs of production, devices and maintenance are all greatly reduced.
Inventors:
FUNG CHIU YIU (CN)
Application Number:
PCT/IB2023/058396
Publication Date:
March 07, 2024
Filing Date:
August 24, 2023
Export Citation:
Assignee:
PHIL & FLOR COMPANY LTD (CN)
International Classes:
C25B9/60; C02F1/20; C25B15/02; C25B15/08; C25B1/04
Foreign References:
| CN115341226A | 2022-11-15 | |||
| CN101407920A | 2009-04-15 | |||
| RU2010890C1 | 1994-04-15 | |||
| JP2006206989A | 2006-08-10 | |||
| CN106283101A | 2017-01-04 | |||
| CN110965069A | 2020-04-07 | |||
| JP2017002344A | 2017-01-05 |
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