CAJ | 학술논문

对循环流化床在脱硝、脱硫和除尘等方面环保技术路线进行了分析，权衡各项技术的利弊及经济因素，结合新颁布的火电厂大气污染物排放标准（GB 13223—2011），做出如下建议：半干旋转喷雾法脱硫工艺（ SDA）和SCR结合使用后，氮氧化物的脱除效率可达到95％，循环流化床中高灰分的环境不适合使用SCR， SNCR的脱除效率虽然相对较低，但是通过调整还原剂的停留时间和与烟气的混合程度，脱硝效率可达70％以上，完全可以满足新环保标准的要求；石灰石－石膏湿法脱硫技术成熟，脱硫效率高，负荷适应性好，在循环流化床炉内脱硫的基础上外加该工艺，可以保证足够的脱硫效率；电袋组合式除尘器发挥了两种除尘器的技术优势，可以达到新标准的要求。
대순배류화상재탈초、탈류화제진등방면배보기술로선진행료분석，권형각항기술적리폐급경제인소，결합신반포적화전엄대기오염물배방표준（GB 13223—2011），주출여하건의：반간선전분무법탈류공예（ SDA）화SCR결합사용후，담양화물적탈제효솔가체도95％，순배류화상중고회분적배경불괄합사용SCR， SNCR적탈제효솔수연상대교저，단시통과조정환원제적정류시간화여연기적혼합정도，탈초효솔가체70％이상，완전가이만족신배보표준적요구；석회석－석고습법탈류기술성숙，탈류효솔고，부하괄응성호，재순배류화상로내탈류적기출상외가해공예，가이보증족구적탈류효솔；전대조합식제진기발휘료량충제진기적기술우세，가이체도신표준적요구。
In this essay, three environmental protection technical routes, denitrification, desulfurization and dust removal of CFB boilers, were analyzed.Considering the advantages and disadvantages of the techniques, economic factors, and with the purpose of meeting the newly issued Power Plant Air Pollutants Emission Standard (GB13223-2011), this essay suggests the following.The combination of SCR and SDA can increase the NOx removal efficien-cy to 95%.But it does not apply to the environment of high ash content in the circulating fluidized bed.Despite of the low efficiency of the SNCR, denitrification efficiency can be up to 70% with the adjustment of the residence time and the mixing proportion of the flue gas, which can fully meet the new environmental standards.In addition, the limestone-gypsum wet FGD technology, with a high desulfurization efficiency and good load adaptation, is com-paratively mature.If the process is added after circulating fluidized bed desulfurization, adequate removal efficiency can be ensured.The advantages of two kinds of dust remover being considered, the electrostatic bag dust remover can meet the new standards.