摘要
采用FLIC和Fluent软件对焚烧炉燃烧和干法脱硝进行数值模拟,得到其内部温度场、速度场和浓度场以及脱硝前后NO_(x)分布。结果表明:一烟道温度为1100~1200 K,基本处于干法脱硝温度窗口内,但贴近前墙温度较低;焚烧炉原始NO_(x)的生成主要发生在炉排上燃烧剧烈的地方;采用8个喷口时NO_(x)浓度在100 mg/Nm^(3)以下,采用12喷口时NO_(x)浓度在80 mg/Nm^(3)以下;在焚烧炉内增加折焰角可以降低烟道内的最大流速,从而增加脱硝反应时间,提高脱硝效率。
Dry de-NO_(x)process has the advantages of strong penetration and deep injection depth in NO_(x)treatment.Its denitration efficiency is better than SNCR,and its investment and operation cost are low,which is of research significance.However,the current research is mostly at the experimental and application,Research needs a lot of manpower,material and financial resources;And the experimental results are difficult to fully reflect the temperature,gas concentration and other parameters in the furnace.In this paper,we use FLIC and Fluent to simulate the combustion and dry de-NO_(x)process of incinerator,,and the internal temperature field,velocity field,concentration field and NO_(x)distribution before and after denitration are obtained.The results show that the temperature of the first flue is about 1100~1200 k,which is basically within the temperature range,but the temperature close to the front wall is low;the generation of original NO_(x)in incinerator mainly occurs at the place with intense combustion on grate;the NO_(x)concentration is less than 100 mg/Nm^(3)when 8 nozzles are used,and less than 80 mg/Nm^(3)when 12 nozzles are used;increasing the flame angle in the incinerator can reduce the maximum flow rate in the flue,thus increasing the denitration reaction time and improving the denitration efficiency.
作者
张小林
龙吉生
杜海亮
胡发立
Zhang Xiaolin;Long Jisheng;Du Hailiang;Hu Fali(Shanghai SUS Environment Co.,Ltd,Shanghai 201703,China)
出处
《环境工程》
CAS
CSCD
北大核心
2023年第S02期417-421,425,共6页
Environmental Engineering
基金
国家重点研发计划项目固废专项(2020YFC1910100)
