Combustion of coal-water mixture.

概要

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The development of CWM preparation process is now at the stage of practical use, and combustion tests and demonstration tests using commercial boilers are began to get the experience for commercial application. Judging from the CWM composition, the combustion process of CWM is considered basically similar to that of pulverized coal (PC). Then we performed a comparative combustion test with CWM and PC prepared from the same parent coal. As a result, it is become clear that CWM shows the following characteristics compared with PC. (a) The flame temperature in the furnace is lower by about 100°C. (b) Emissions of NO and CO are somewhat low. (c) Unburned carbon content in fly ash is slightly higher than pulverized coal, but it is very lower than predicted value due to the some combustion promotive effect. (d) Atomizing performance is very important to prevent the formation of large scale droplet which is apt to make a agglomerate particles. In foreign countries such as USA, Canada, Sweden and so on, many demonstration programs using commercial boilers have been carried out to confirm the availability of CWM as a alternative fuel to a oil fired boiler. Details of these experiences are reported at the International Symposium on Coal Slurry Fuels Preparation and Utilization held in USA annually. Summary of them are introduced in this paper.
一般社団法人日本エネルギー学会の論文