Title:
HYDROCHLORIC ACID WASTE LIQUID REGENERATION METHOD AND SYSTEM BASED ON FLUIDIZED BED METHOD
Document Type and Number:
WIPO Patent Application WO/2022/001052
Kind Code:
A1
Abstract:
The present invention relates to a hydrochloric acid waste liquid regeneration method based on a fluidized bed method. The method comprises: hydrochloric acid waste liquid enters a Venturi pre-concentrator for concentration; concentrated waste liquid is conveyed into a fluidized bed reaction furnace for reaction to generate ferric oxide and high-temperature flue gas; the high-temperature flue gas is subjected to waste heat utilization after being subjected to coarse dust removal, and the temperature of the flue gas is thus reduced to 420-550°C; the flue gas obtained after waste heat utilization is conveyed into the Venturi pre-concentrator to exchange heat with the hydrochloric acid waste liquid, so that the concentrated waste liquid is obtained; and outlet flue gas of the Venturi pre-concentrator is subjected to HCl recovery to obtain regenerated acid. Correspondingly, the present invention further provides a hydrochloric acid waste liquid regeneration system based on the fluidized bed method. As outlet high-temperature flue gas of the fluidized bed reaction furnace enters the Venturi pre-concentrator after being subjected to waste heat utilization, waste heat of the high-temperature flue gas can be fully utilized; and the temperature of inlet flue gas of the Venturi pre-concentrator is controlled within a reasonable range, a conventional operation of adding fresh water or rinse water to the Venturi pre-concentrator can be omitted, and the energy consumption required for regeneration of the hydrochloric acid waste liquid is effectively reduced.
Inventors:
ZHAO JINBIAO (CN)
WANG JUN (CN)
GAO JUNFENG (CN)
DING YU (CN)
CHANG QINXUE (CN)
WU ZONGYING (CN)
GUO JINCANG (CN)
YAN ZHEN (CN)
WANG JUN (CN)
GAO JUNFENG (CN)
DING YU (CN)
CHANG QINXUE (CN)
WU ZONGYING (CN)
GUO JINCANG (CN)
YAN ZHEN (CN)
Application Number:
PCT/CN2020/140774
Publication Date:
January 06, 2022
Filing Date:
December 29, 2020
Export Citation:
Assignee:
WISDRI ENGINEERING & RES INCORPORATION LIMITED (CN)
International Classes:
B01D53/14; C23G1/36; C02F1/02
Foreign References:
| CN111809191A | 2020-10-23 | |||
| JPS59162105A | 1984-09-13 | |||
| CN104449872A | 2015-03-25 | |||
| CN105887108A | 2016-08-24 |
Attorney, Agent or Firm:
BEIJING HUIZE INTELLECTUAL PROPERTY LAW LLC (CN)
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