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Show The purpose of this paper is to report on the combustion characteristics of No. 2 fuel oil and coal fuel mixtures. The paper will not address questions concerning economics, ash accumulation or fouling characteristics, or pollution characteristics. These are certainly other topics which must be addressed before conversion to this fuel mixture is possible. It should be noted however, that results of other studies regarding the heavier residual fuel oils mixed with coal(2j have addressed many of these problems and these results should be applicable to the coal-lighter fuel oil mixtures. Before presenting the results of the current study, a brief description of the facilities along with the analysis of the fuels used in the study will be presented. Since the authors have studied mixtures of lignite with No. 2 fuel oil previously, a brief section will be devoted to the presentation of these results as they pertain to the current study. COMBUSTION FACILITY The combustion facility available at Louisiana State University has been described in detail elsewhere (1,4,5,6,7). A brief summary of this facility will be included in this paper, highlighting the major components involved in this study. The primary piece of equipment utilized in these combustion studies is the industrial scale research combustion chamber. The chamber is essentially a refractory lined, rectangular box with inner dimensions of 1.5 m (5.0 ft) wide by 3.0 m (10.0 ft) long by 2.1 m (7.0 ft) high. The chamber is shown schematically in Figure 1. The combustion chamber has removable water jacket steel panels on all external walls with the exception of the front wall. The front wal] is used to house burners associated with various studies. The water jacket surrounding the combustion chamber principally functions to intercept heat flowing from the furnace Lnto the surrounding room. The jackets are not provided for the generation oi steam. During tests conducted with fuel mixtures of coal and No. 2 fue] oil, no other heat removal mechanism was present inside the combustion chamber. The inner surfaces of the combustion chamber walls have been fitted with thermocouples at various locations for temperature measurements. 3 |
