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本文提出了有关煤焦非均相反应动力学的新观点,即认为任何煤焦与氧的反应,其反应活化能E 值不随煤种而变,它仅是煤焦表面温度的函数;但煤焦的反应频率因子K_(o,cb)随煤种而变.本文中给出了在着火期间的纯碳与氧反应的活化能E=152kJ/mol(36.3kcal/mo1),它通用于所有煤焦与氧的着火反应.本文首次给出了煤焦与氧反应的频率因子K_(o,cb),与煤种的关系,改变了前人研究中E、K(o,cb)都随煤种而变但无通用规律的状况.本文中还提出了一个判别煤焦着火性能的新无因次准则F_(?),它只取决于煤的工业分析数据,综合地反映了煤质的优劣,故称其为煤质数,煤质数越大,其着火性能则越好.该准则对于设计人员和运行工人掌握、判别不同煤种的着火性能颇具实用价值,可改变长期来只用可燃基挥发分含量V_(?)值来判断煤着火性能的片面观点.
In this paper, we propose a new viewpoint on heterogeneous reaction kinetics of coal char. That is to say, the reaction activation energy E of any coal char reacts with oxygen, which does not change with coal type. It is only a function of coal char surface temperature. However, coal The reaction frequency factor K_ (o, cb) of the coke varies with the type of coal.This paper gives the activation energy E = 152kJ / mol (36.3kcal / mol) of reaction of pure carbon with oxygen during ignition, The reaction of coal char with oxygen is the first time that this paper gives the relationship between the reaction of coal char and oxygen, K_ (o, cb), with the coal type, and the change of E, K (o, cb) Coal species change but no general rule of the situation.In this paper, a new non-dimensional criterion F_ (?) To judge the ignition performance of coal charcoal is also proposed, which only depends on the industrial analysis data of coal, which comprehensively reflects the quality of coal The pros and cons, it is called the coal quality number, the greater the coal quality, the better its fire performance.The guidelines for designers and operators to grasp, determine the ignition of different coal quite practical value, can change long-term only One-sided view of judging coal firing performance by V_ (V) value of combustible base volatile content.