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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

HIGH-GRADE ENERGY RECOVERY FROM MOLTEN SLAG IN A CIRCULATING FLUTDIZED BED

Get access (open in a dialog) DOI: 10.1615/IHTC10.2670
pages 257-262

要約

A scheme for the recovery of high grade waste heat from molten slags is described. Droplets have been produced using two impinging jets of molten slag. These are sufficiently cooled as they fall through a circulating fluidized bed (CFB) to obviate agglomeration problems when they are collected in a turbulently fluidized bed at the base of the CFB. It is expected that the slag droplets will also be a marketable product of the process. Laboratory constraints limited the extent of tests because, using a single charge of slag, the crucible empties in less than a minute but the feasibility of the system has been demonstrated and comparison with the predicted response of a simple dynamic model suggest a droplet-to-CFB heat transfer coefficient in excess of400 W/m2K.
Consideration of steady state heat balances illustrates the inter-relation between the operating parameters. Work is required to determine the flow characteristics of large particles falling counter to a CFB and to undertake pilot scale tests in an industrial environment where there is an adequate supply of molten slag to permit attainment of steady state operation.