Title:
METHOD FOR EFFICIENTLY REGENERATING RESIN BY USING ELECTROLYTIC SALT SOLUTION
Document Type and Number:
WIPO Patent Application WO/2020/228638
Kind Code:
A1
Abstract:
The present invention relates to the field of resin regeneration and relates to a method for efficiently regenerating a resin by using an electrolytic salt solution. The method for efficiently regenerating a resin by using an electrolytic salt solution as provided by the present invention comprises the following steps: (1) after carrying out electrolytic reaction on an NaCl solution having a mass concentration of 1%-20% by using a voltage of 1-30 V, obtain an electrolytic solution; (2) introducing the electrolytic solution from a bottom part of a resin column filled with an ion exchange resin, and backwashing the filled ion exchange resin to obtain a resin desorption solution; and (3) carrying out an electrochemical reaction on the resin desorption solution to obtain an effluent, the effluent being introduced from the bottom part of the resin column, the filled ion exchange resin being backwashed, and a waste liquid after backwashing undergoing an electrochemical reaction; a cyclical reaction is performed as such. The method for regenerating a resin according to the present invention has a high nitrate nitrogen removal efficiency of up to 85%-100%, and the re-adsorption capacity of a regenerated resin is 80%-95% of the saturated adsorption capacity of the resin before regeneration.
Inventors:
SHUANG CHENDONG (CN)
YANG MENGQIAN (CN)
WANG JUNTIAN (CN)
LI AIMIN (CN)
YANG MENGQIAN (CN)
WANG JUNTIAN (CN)
LI AIMIN (CN)
Application Number:
PCT/CN2020/089409
Publication Date:
November 19, 2020
Filing Date:
May 09, 2020
Export Citation:
Assignee:
UNIV NANJING (CN)
NANJING UNIV & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING (CN)
NANJING UNIV & YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING (CN)
International Classes:
B01J49/00; C02F1/42
Foreign References:
| CN110038647A | 2019-07-23 | |||
| CN109626672A | 2019-04-16 | |||
| CN104140175A | 2014-11-12 | |||
| CN108862472A | 2018-11-23 | |||
| KR20090074602A | 2009-07-07 | |||
| US6358396B1 | 2002-03-19 | |||
| US20150144566A1 | 2015-05-28 |
Attorney, Agent or Firm:
RAYTO PARTNERS, P.C. (CN)
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