Title:
DOMESTIC WASTE INCINERATION FLY ASH TREATMENT SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/247819
Kind Code:
A1
Abstract:
The present invention relates to a domestic waste incineration fly ash treatment system, suitable for clean and efficient treatment of municipal solid waste incineration fly ash, and comprising a three-stage gradient water washing subsystem, a filtrate post-treatment subsystem, an MVR evaporation salt making subsystem, a pressure filtration subsystem, and a filter cake post-treatment subsystem. In the system of the present invention, a water washing dechlorination rate of the three-stage gradient water washing subsystem for fly ash can reach 99%; the filtrate post-treatment subsystem solves the problems in a fly ash removal technique such as low selectivity and sensitivity, high treatment cost and incomplete removal; the content of heavy metals in ash washing wastewater is reduced to meet the standard of water washing chlorides in co-processing fly ash pretreatment products with a cement kiln, and the content of some heavy metals can be reduced to meet wastewater discharge standards, so that recycling of inorganic salts in high-salinity ash washing wastewater is implemented, and a resource utilization process of the ash washing wastewater generated in fly ash pretreatment is prompted.
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Inventors:
ZHU YUEZHAO (CN)
ZHANG WENQI (CN)
ZHANG ZHENJIE (CN)
WANG LEI (CN)
WANG YINFENG (CN)
ZHANG WENQI (CN)
ZHANG ZHENJIE (CN)
WANG LEI (CN)
WANG YINFENG (CN)
Application Number:
PCT/CN2022/094647
Publication Date:
December 01, 2022
Filing Date:
May 24, 2022
Export Citation:
Assignee:
UNIV NANJING TECHNOLOGY (CN)
International Classes:
B09B3/00; C02F9/00
Foreign References:
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Attorney, Agent or Firm:
BEIJING HENGLV INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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