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蓄热式加热炉的自动燃烧控制技术 总被引:1,自引:0,他引:1
介绍了蓄热式加热炉自动燃烧控制的关键技术及其应用,重点介绍蓄热式燃烧控制的三个特点:烟气温度测量、自动换向控制、烟空比控制.生产情况表明:自动控制系统运行稳定,排烟温度低,达到节能和环保目的. 相似文献
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蓄热式加热炉换向燃烧时,煤气换向阀至烧嘴之间管道里残留的煤气直接被排入大气。为了能够降低蓄热式加热炉能源消耗、减少污染排放,对蓄热式加热炉换向过程开展探究。对唐山市某钢厂一座160 t/h蓄热式加热炉设计了蓄热式加热炉烟气反吹系统,通过科学的时序控制和安全联锁,与原蓄热式加热炉控制程序合理链接,实现整套系统安全可靠运行。蓄热式加热炉烟气反吹系统的投入应用,使加热炉单位能耗由原来的0.882降低至0.823 GJ/t,CO减排率达到94.9%,同时为燃烧控制及维修提供了数据依据。 相似文献
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利用大型软件CFX4.4建立了高温蓄热式加热炉内温度场的数学模型。分析空气中氧气体积分数对蓄热式加热炉温度分布的影响,得出高温低氧空气燃烧加热效果更佳的结论。 相似文献
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介绍了高温空气燃烧技术在唐钢二高线步进梁式加热炉上的应用,介绍了炉体结构、蓄热式燃烧系统、控制系统及改造后的效果,并介绍了蓄热式燃烧系统的选型特点。 相似文献
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太钢集团临汾钢铁有限公司中板厂采用蓄热式燃烧技术对2号加热炉进行了改造,以提高热能利用率,减少环境污染。综述了蓄热式燃烧技术在临钢中板厂连续式加热炉的开发应用情况,介绍了蓄热式燃烧中的供风、煤气、换向控制等主要系统的结构和技术特点。 相似文献
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分析了蓄热式燃烧技术在镁还原炉应用实践中产生的问题及其成因,针对金属镁还原工艺具有保温时间长及温度均匀性要求高的特点,开发了蓄热式脉冲燃烧控制技术,改善了炉温均匀性,提高了镁成品质量,可有效降低热还原法制备金属镁的成本.通过在镁还原炉中的实际应用,介绍了其系统组成,对蓄热式技术在镁还原炉中的应用与改进具有参考价值和指导意义. 相似文献
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梭式窑应用蓄热燃烧技术的节能减排效果 总被引:1,自引:0,他引:1
通过对梭式窑在现有燃烧方式和蓄热燃烧技术进行热平衡计算,结合蓄热燃烧技术的特点,分析了使用蓄热燃烧技术下梭式窑节能及减排效果。 相似文献
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新钢步进梁式加热炉采用高温空气燃烧技术,大幅度降低燃料消耗并使CO2和NOx排放量大大降低.重点介绍了高效节能双蓄热式步进梁加热炉的主要技术性能和HTAC燃烧系统与自动控制系统的技术特点和应用效果. 相似文献
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《Baosteel Technical Research》2010,(Z1):111
High Temperature Air Combustion(HTAC) based on regenerative theory has been used in developed countries in recent years,it has many advantages such as efficient recovery of waste heat,high temperature preheating air,low pollution discharge,and so on.This Technology can be used in various furnaces in mechanical,petroleum,chemical industry.To rebuild traditional radiant-tube combustion system with HTAC technology has become important.In the transformation process,The biggest difficulty encountered is that the stability of burner combustion and control system. Because the exhaust gas heat is absorbed by the regenerator,exhaust gas discharge can be controlled at a very low temperature to realize maximum waste heat recovery.At the same time,it improves the temperature uniformity and improve the heating intensity.Thermal efficiency of the device can reach more than 80%.And compared to the traditional air preheating,21.55%energy can be saved. Revamping on traditional radiant-tube combustion system is technically feasible,but a lot of problems will be involved since the rebuild work is on the old system,this article discusses on the main problem encountered in rebuild process in site. to optimize temperature control and obtain not so high exhaust gas temperature,digital combustion control system is necessary.This control loop consists of big loop and small loop,Big loop controls the load distribution of all burners in each heating zone.Small loop controls each heating zone burner’s burning time. Compared performance of tradition radiant-tube heater with regenerative radiant-tube heater,result that regenerative radiant-tube heater have many advantage in consume fuel.Accordance with experience of replacing tradition radiant-tube heater with regenerative type,give a proposition in combustion control system, pilot burner,flame detection and prevent trouble to rebuild work of CAPL and CGL. It is recommended to use regenerative combustion technology in new annealing Line.Although the investment is 1/3 much more than the traditional combustion system,the energy saving effect is obvious and operating costs decreases.Revamping can be taken step by step according to different heating zones.Although taking a long time,it is safer and it influences the production less. Regenerative combustion burner revamping has become successful.However,the revamping work on different furnaces,particular on continuous annealing furnace with high request for temperature control,need further exploration and research. 相似文献
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介绍了高温空气蓄热式燃烧技术在中厚板轧钢厂2座加热炉上的应用情况。对采用不同蓄热体及燃烧方式的2座加热炉的实际效果进行了分析,总结了高温空气蓄热式燃烧技术的实践经验,为进行大型板坯加热炉蓄热式技术改造提供了依据。 相似文献
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叙述了蓄热式燃烧技术的起源、发展和工作原理,对燃料换向蓄热式燃烧技术和燃料不换向蓄热式燃烧技术进行了比较,燃料不换向蓄热式燃烧在环形熔铝炉上应用后,年节煤气创效351万元. 相似文献