HU Wei-jie.Analysis on the Urban Sewage Sludge Co-incineration Technology of Coal-fired Power Plants[J].China Water & Wastewater,2021,37(8 8):24-31.
Analysis on the Urban Sewage Sludge Co-incineration Technology of Coal-fired Power Plants
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
8 8
Page:
24-31
Column:
Date of publication:
2021-04-17
- Keywords:
- urban sewage sludge; co-incineration; power plant
- Abstract:
- Urban sewage sludge is a sink for a number of pollutants，and when the sewage sludge is co-incinerated in coal-fired power plants, the additional input of heavy metals (particularly highly volatile substances such as mercury) becomes a remarkable emission issue. This is one of the reasons that the sewage sludge co-incineration in coal-fired power plants should be limited to a very small amount. Another reason for limiting the co-incinerated sewage sludge quantity is the quality of the fly ash which is usually used as a building material, which must be evaluated by the relevant building material standards. Since the concentration of heavy metals in the sludge is generally higher than that in coal, the sludge co-incineration in coal-fired power plants may be suspected of excessive concentrations of power plants such as “dilution emissions” or other undetected pollutants such as dioxins when the Emission Standard of Air Pollutants for Thermal Power Plants (GB 13223-2011)is simply used without considering the pollutant characteristics of the sludge. The co-incineration of sludge in power plants must pay attention to the “contaminant” characteristics of the sewage sludge, rather than simply treating the sludge as a kind of “biomass”. The synergistic treatment of sludge is not a simple and unconditional synergy, and the HSE principle must be fully applied.
Last Update:
2021-04-17