公开(公告)号：US11292718B2

公开(公告)日：2022-04-05

申请号：US16618937

申请日：2018-12-27

Applicant: SHANDONG UNIVERSITY

Inventor： Chunyuan Ma ,  Xiao Xia ,  Lin Cui ,  Liqiang Zhang ,  Xiqiang Zhao ,  Jun Li ,  Tai Feng ,  Shizhen Zhang

IPC: B01D1/28 ,  B01D39/12 ,  B01D39/20 ,  B01D53/50 ,  B01D53/56 ,  B01D53/80 ,  B03C3/16 ,  C01B17/04 ,  C01B17/05

Abstract: The present invention discloses a process for preparing sulfur from reduction of sulfate/nitrate by iron-carbon and recovering desulfurization/denitration agents. High-concentration SO2 flue gas produced by calcination of a sulfate and NOx produced by heating decomposition of a nitrate can be directly reduced to elemental sulfur vapor and N2 through reaction with an iron-carbon material at a high temperature. Then, after dust removal, cooling and fine dust removal, sulfur is recovered by a sulfur recovery device, and metal oxides can replace alkaline mineral resources such as limestone as raw materials of desulfurization (denitration) agents. This process can recycle the desulfurization and denitration agents.