煤粉非均相MILD燃烧及燃料型NOx生成机理研究

项目名称： 煤粉非均相MILD燃烧及燃料型NOx生成机理研究

项目编号： No.51506069

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 能源与动力工程

项目作者： 王飞飞

作者单位： 华中科技大学

项目金额： 20万元

中文摘要： MILD燃烧是在上世纪90年代被提出的一种新型燃烧方式。相比于常规燃烧，该燃烧能提高30%的热利用效率，并能减排近70%的NOx。因此，它被视为本世纪最具发展潜力的燃烧方式之一。然而，该燃烧虽已被成功应用于钢铁冶金行业，但以煤粉为燃料的常温空气MILD燃烧的研究十分匮乏，这严重制约了该燃烧在我国燃煤行业的应用。针对此，本项目拟以煤粉MILD燃烧为对象，深入研究该燃烧的发生机理，进而掌握常温空气煤粉MILD燃烧的实现方法及演变规律；揭示常温空气煤粉MILD燃烧的定义、反应区特征（如挥发分-煤焦燃尽特性、组分生成消耗规律）及传热特性；总结常温空气煤粉MILD燃烧下的NOx排放特性及燃料型NOx的生成与还原规律。本项目是对煤粉MILD燃烧的基础理论的研究，可为该燃烧的实际应用提供理论指导。

中文关键词： MILD燃烧；无焰燃烧；煤粉燃烧；NOx生成机制

英文摘要： MILD combustion is a new type of combustion technology and has been developing in past two decades. Compared to the conventional one, this combustion can improve its thermal efficiency even by 30% and reduce the NOx emissions by about 70%. Thus it is regarded as one of the most promising combustion technologies of this century. However, although this technology has been successfully applied in the steel making and the metallurgy plants, many fundamental problems of pulverized coal MILD combustion without air preheating are unresolved. This extremely limits its applications in the coal combustion fields, especially in China. To this end, this project is to investigate the characteristics of the pulverized coal MILD combustion through experiments and modelling. The aims of the project are: quantitatively summarizing the controlling method to achieve the pulverized coal MILD combustion without air preheating; understanding the exact definition of MILD combustion firing pulverized coal and then clarifying its characteristics and the kinetics of the volatile-char and immediate species in the reaction zone; investigating the NO emissions and the characteristics and the NOx formation/destruction routes under the pulverized coal MILD condition. This project is to investigate the fundamental knowledge of the pulverized coal MILD combustion and can provide some guide for its practical applications.

英文关键词： MILD combustion;Flameless combustion;Combustion of pulverized coal;NOx formation mechanisms