摘要
医疗废物焚烧过程中烟气温度、浓度和废气量波动大,大气污染物中氮氧化物(NO_(x))指标难以实现超低排放。为此,研究采用燃烧温度控制、二级多点温度控制、烟气含氧量控制、变频计量控制风量和强雾化混合等多方面措施,改进选择性非催化还原烟气脱硝工艺,实现了NO_(x)实现超低排放。研究结果表明,本研究采用的改良SNCR工艺对医疗废物焚烧烟气中的氮氧化物去除率比常规SNCR脱硝工艺提高20%~30%,同时,相对于常规选择性催化还原烟气脱硝技术,不需要投入昂贵的脱硝催化剂和烟气升温系统,大大减少脱硝系统运行成本和能源消耗。该工艺研究对于医疗废物焚烧烟气氮氧化物的超低排放具有重要参考价值。
In the process of medical waste incineration,the temperature,concentration and quantity of flue gas fluctuate greatly,and it is difficult to achieve ultra-low emission of nitrogen oxides(NO_(x))in air pollutants.Therefore,measures such as combustion temperature control,two-stage multi-point temperature control,oxygen content control of flue gas,variable-frequency metering control of air volume and strong atomization mixing are adopted to improve the selective non catalytic reduction flue gas denitrification process and achieve ultra-low NO_(x) emission.The research results show that the nitrogen oxide removal rate of the improved SNCR process adopted in this study is 20%~30%higher than that of the conventional SNCR denitration process.At the same time,compared with the conventional selective catalytic reduction flue gas denitration technology,it does not need to invest expensive denitration catalyst and flue gas heating system,which greatly reduces the operating cost and energy consumption of the denitration system.The study of this process has important reference value for the ultra-low emission of nitrogen oxides in medical waste incineration flue gas.
作者
夏小龙
江理明
XIA Xiao-long;JIANG Li-ming
基金
《广东省环境保护厅关于固体废物污染防治三年行动计划(2018-2020年)》
2020年医疗废物集中处置设施建设项目中央预算内投资(发改办环资[2020]437号)。
作者简介
夏小龙(1966-),男,汉族,安徽安庆人,环保工程(危废)高级管理师,工程师,本科,研究方向为环保工程;通信作者:江理明(1971-),男,汉族,江西上饶人,硕士研究生,高级工程师,研究方向为环境科学技术与环境影响研究。
