摘要:
新建的攀钢4号高炉外燃式热风炉,实现高风温的关键是研究合理的燃烧制度,选择最佳燃烧操作参数,改进燃烧操作,实现自动控制燃烧,研究认为,采用空燃比为0.70~0.77,固定煤气量,调节助燃空气量的快速燃烧制度是合理的;实现高炉净煤气主管压力自动调节,采用拱顶温度、烟道废气温度、空燃比、烟道废气残氧量和高炉煤气量五个操作参数进行闭环自动控制燃烧,能可靠地控制燃烧过程,实现安全、稳定、快速燃烧。可以确保高炉1100℃的高风温,并有利于延长热风炉寿命。
Abstract:
The high temperature practice of the external combustion hot stoves on the new BF at PZH I & S Co. can be realized on the basis of rational combustion schedule,option of optimum combustion parameters, improvement of combustion operation and automatized combustion control.It is coucluded by our research that it's rational to adopt rapid combustion schedule with a ratio of air to fuel 0. 70~0.77,fixed gas flow and adjusted combustion airflow. The combustion process can be successfully controled and a safe,stable and rapid combustion can be realized by means of automatized adjustion of the pressure of BF clean gas mains and automatized closed combustion control depending on five operating varibles:dome temperature,flue gas temperature,ration of air to fuel,residual oxygen of flue gas and BF gas flow. Blast temperature as high as 1100℃ can be obtained and the service life of hot stoves is expected to be extended.
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