烟气氨法脱硫氨逃逸情况监测与评价

Monitoring and Evaluation of Ammonia Escape During Ammonia Desulphurization

氨法脱硫是控制二氧化硫排放的主要技术手段,但脱硫后烟气中可能存在氨逃逸的问题。以某炼化企业自备电厂两台燃煤锅炉及相关脱硫设施为研究对象,重点监测氨法脱硫设施出口氨、颗粒物、硫酸铵、二氧化硫,评价脱硫后烟气中氨逃逸情况。研究结果表明:部分监测时段外排废气中氨浓度超过HJ 2001-2010《火电厂烟气脱硫工程技术规范氨法》中氨逃逸质量浓度10倍以上,硫酸铵是颗粒物中的主要成分,硫酸铵的逃逸是导致颗粒物浓度超标的主要原因。

Ammonia desulphurization is the main technical means to control sulfur dioxide emissions,but ammonia escape could not be ignored after desulfurization.In this study,two coal-fired boiler and the related desulphurization facilities in a self-generation power plant of a petrochemical company were selected to evaluate the ammonia escape after desulphurization.The results showed that:the concentration of ammonia in the flue gas could occasionally reached about ten times of that from the standard"Technical Specification for Ammonia Flue Gas Desulfurization Projects of Thermal Power Plant"(HJ 2001-2010).Ammonium sulfate was the main component of the exhausted particulate matter,and contributed to the ammonia escape.