CAJ | 학술논문

以某台90 t/h 链条炉为研究对象,运用 Fluent 软件对炉内的流动传热、气相燃烧过程进行模拟,得到炉内的速度场和温度场,并由此确定了炉膛中上部为适宜进行选择性非催化还原(SNCR)烟气脱硝的区域,进而结合该链条炉炉膛空间较大的特点,将喷氨口位置选定在前墙5．7 m 高度处,沿宽度方向均匀布置8个喷氨口.对 SNCR 烟气脱硝系统进行数值模拟,结果表明：氨水液滴的喷射速度为40 m/s,n(NH3)∶n(NO)为1．5,NH3总消耗量为0．00258 kg/s,氨水液滴直径为60μm 时,还原剂 NH3和 NO 反应最充分,NO 脱除效率最高,为42．3％.
이모태90 t/h 련조로위연구대상,운용 Fluent 연건대로내적류동전열、기상연소과정진행모의,득도로내적속도장화온도장,병유차학정료로당중상부위괄의진행선택성비최화환원(SNCR)연기탈초적구역,진이결합해련조로로당공간교대적특점,장분안구위치선정재전장5．7 m 고도처,연관도방향균균포치8개분안구.대 SNCR 연기탈초계통진행수치모의,결과표명：안수액적적분사속도위40 m/s,n(NH3)∶n(NO)위1．5,NH3총소모량위0．00258 kg/s,안수액적직경위60μm 시,환원제 NH3화 NO 반응최충분,NO 탈제효솔최고,위42．3％.
Taking a 90 t/h travelling grate boiler as the research object,the Fluent software was applied to simulate the flowing heat transfer and gas phase combustion in the furnace.The velocity field and tempera-ture field in the furnace was obtained and the middle-upper part of the furnace was identified as the proper area for selective non-catalytic reduction (SNCR)denitration.Considering the furnace space is adequate, the ammonia injection point was located at the place of 5.7 m high on the front wall and a total of 8 ammo-nia injection points were regularly arranged along the width of the furnace.On this basis,numerical simula-tion on the SNCR denitration system was carried out.The results show that,under the condition with the ammonia spraying velocity of 40 m/s,the ammonia droplet diameter of 60 μm,the molar ratio of NH 3 to NO of 1.5 and the total NH 3 consumption of 0.002 58 kg/s,the reaction between NH 3 and NO was the most complete and the NO removal rate reached the highest,42.3%.