Open AccessResearch on countermeasures against slurry foaming and poisoning of desulphurization system in coal-fired power plants
Author(s) -
Song Da,
Ying Ma,
Feng Xue,
Yulong Zhang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/651/2/022069
Subject(s) - flue gas desulfurization , slurry , waste management , flue gas , boiler (water heating) , coal , coal slurry , environmental science , power station , sulfur dioxide , engineering , environmental engineering , chemistry , electrical engineering , inorganic chemistry
With the completion of the ultra-low emission transformation of coal-fired generating units, the boiler flue gas bypass has been completely cancelled. Under extreme operating conditions of the boiler, the flue gas must pass through the desulfurization system. Excessive dust and unburned fuel in the flue gas enter the desulfurization slurry in large quantities, causing slurry bubbles or even overflow, and indirectly leading to a sharp drop in desulfurization efficiency. The emission concentration exceeds the standard. Based on the analysis of previous research results, the reasons for the foaming and overflow of the desulphurization slurry are summarized. Through theoretical analysis of various causes, the countermeasures against foaming and poisoning of desulphurization slurry were proposed and the feasibility of countermeasures was demonstrated through actual cases. It points out the preventive measures for bubble poisoning of limestone-gypsum wet desulfurization slurry, which has important practical guiding significance for the ultra-low SO 2 emission of the flue gas of the desulfurization system of coal-fired power plants.