連続製造法による高濃度石炭-水スラリー (CWM) の諸物性

概要

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To use CWM as a fuel in large quantity, the feasibility of this must first be demonstrated by a larger scale experiment. For this purpose, the properties of CWM containing a nonionic dispersant [N-poly (oxyalkylene) polyethylenimine, abbreviated as POA-PEI] or anionic dispersant (sodium salt of formalin condensate of naphthalenesulfonic acid, NSF-Na) were examined by continuous production and storage tests. The findings warranting attention are as follows : 1) CWM produced by the large-scale continuous and small-scale batch processes showed essentially the same properties. CWM produced by the batch process made it possible to examine the physical properties of that produced by the large scale continuous process. 2) CWM was obtained with a coal concentration and viscosity that was higher and lower, respectively, than that containing NSF-Na, using POA-PEI, regardless of the scale of production. 3) Older, or more carbonized coal could be made into CWM loaded to a greater extent. Analytical values (O/C and H/C values) of coal made possible estimation of the loading level of CWM. 4) POA-PEI showed higher pulverizing efficiency in CWM production than NSF-Na. 5) The viscosity of CWM using POA-PEI could be owered more effectively by stirring than using NSF-Na. The CWM showed storage stability exceeding a period of one month.
社団法人日本油化学会の論文