蓄热式加热炉在燃烧过程中,换向阀与蓄热烧嘴之间的CO会被直接排放到大气中,造成环境污染和能源浪费.通过研究与实践,将烟气反吹技术应用到蓄热式加热炉燃烧系统中,有效的解决了现有蓄热式加热炉大量残余CO排放的问题,带来了显著的经济效益和环保效益.
介绍了河钢塞尔维亚斯梅带雷沃钢厂新建3#双蓄热式加热炉的技术特点.其采用高炉煤气替代天然气,降低了燃料成本;通过合理的燃料配比及烟气反吹燃烧等技术的应用,解决了蓄热式加热炉NOx和CO超标排放的问题;此外,该加热炉还采用了汽化冷却、均热段倾斜式炉底和排渣孔等技术,以及一级和二级控制技术,提高了加热炉的经济效益和操作便利性.
The two regenerative walking beam furnaces of No.1 steel making and rolling mill of Hesteel Tangsteel had some problems such as high gas consumption and the bad heating quality of the slab.By reducing the designed output,optimization of the heating system,adjusting the heating proportion and the heating load of each zone of the furnaces,and reconfiguring the air,gas and exhausted gas pipelines of the furnaces,the precision measurement of the medium was achieved.The use of barriers and honeycombs in the regenerative burners was increased to stabilize the regenerative combustion process.The level 1 control program was modified,to solve the problem of frequent adjustment of the existing control system and realize the level 1 automatic combustion control combustion control system of the furnace.Compared with the pre-modification,the heating quality of slabs was improved,the oxidation of the slabs was further reduced,and the consumption of tonnage steel was reduced by 25％,which provided a reference for the technical upgrading of similar reheating furnace.
唐钢热轧部1700线拥有两座加热炉,两炉均使用高炉煤气,为减小高炉休风对加热炉生产的影响,决定对其2#炉进行混合煤气改造,混合煤气为转焦混合煤气.目前,中高热值煤气在双蓄热板坯加热炉上应用尚无先例,介绍了中等热值煤气在双蓄热板坯加热炉上应用效果、存在问题、原因分析及改进措施,对同类加热炉使用中热值燃料具有借鉴意义.
Against to the problems in using normal burning technique: uneven heating,not enough heating power and high energy consumption,the roaster for ladle in No.1 Steel Rolling Mill of Tang Steel is reformed: adopting off-line regenerative burning technique,reforming the relative equipments,optimizing roasting process,proposing out standards for ladle flame control,roasting time control and ladle put-in.After that the ladle roasting system operates safely and reliable,its all indexes are good,save gas cost,makes excellent economic and social profit.
