Burning Pulverized Coal In Co_2 Atmosphere At Low Oxygen Concentrations

摘要

This paper presents a new approach for oxycoal flame stabilization. The swirl burner design and its operating conditions have been adjusted in order to enforce CO formation in the near-burner region, thus stabilizing the flame and obtaining full burnout at levels of O_2 content in the CO_2/O_2 mixture similar to those in air. Numerical and experimental investigations on the stability of a swirl oxycoal flame are presented. The process of a burner's design using a CFD technique is especially emphasized by demonstrating the development chronologically. The consequences of the underlying mechanisms leading to a technical solution are discussed: a stable oxycoal flame with O_2 volume concentrations equal and less than that of oxygen in air can be realized.