Patent number: 11731874
Abstract: A system for resource recycling of sulfur dioxide includes a charcoal reduction furnace, a high temperature dust remover, a cooling separator A, a liquid sulfur tank, a cooling separator, a tail gas absorption tower, a gas stripping tower, a hypo reactor, a centrifuge, a mother liquor tank and a thickener. And a method for resource recycling of sulfur dioxide includes the following steps: (1) preparing elemental sulfur, (2) removing dust from a process gas containing gaseous sulfur, (3) separating elemental sulfur, (4) reabsorbing residual SO2 gas, (5) purifying sulfur powder, (6) preparing a slurry of cured hypo, (7) performing liquid-solid separation, and (8) preparing an absorption slurry. According to the method, SO2 gas is reduced into liquid sulfur and sulfur powder, and sodium thiosulfate is coproduced.
Type:
Grant
Filed:
May 10, 2020
Date of Patent:
August 22, 2023
Assignees:
NANJING GEKOF INSTITUTE OF ENVIRONMENTAL PROTECTION TECHNOLOGY & EQUIPMENT CO., LTD., NANJING TECH UNIVERSITY, JIANGSU DEYITONG ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD., NANJING LIYUAN ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD.
Inventors:
Haitao Xu, Yanzhong Xu, Mingbo Li, Renyuan Chen, Dahua Liu, Zhenshan Wu, Jing Song, Meng Xu
Publication number: 20230046206
Abstract: A system for resource recycling of sulfur dioxide includes a charcoal reduction furnace, a high temperature dust remover, a cooling separator A, a liquid sulfur tank, a cooling separator, a tail gas absorption tower, a gas stripping tower, a hypo reactor, a centrifuge, a mother liquor tank and a thickener. And a method for resource recycling of sulfur dioxide includes the following steps: (1) preparing elemental sulfur, (2) removing dust from a process gas containing gaseous sulfur, (3) separating elemental sulfur, (4) reabsorbing residual SO2 gas, (5) purifying sulfur powder, (6) preparing a slurry of cured hypo, (7) performing liquid-solid separation, and (8) preparing an absorption slurry. According to the method, SO2 gas is reduced into liquid sulfur and sulfur powder, and sodium thiosulfate is coproduced.
Type:
Application
Filed:
May 10, 2020
Publication date:
February 16, 2023
Applicants:
NANJING GEKOF INSTITUTE OF ENVIRONMENTAL PROTECTION TECHNOLOGY & EQUIPMENT CO., LTD., NANJING TECH UNIVERSITY, JIANGSU DEYITONG ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD., NANJING LIUYAN ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD.
Inventors:
Haitao XU, Yanzhong XU, Mingbo LI, Renyuan CHEN, Dahua LIU, Zhenshan WU, Jing SONG, Meng XU