91-95<span style="font-size:11.0pt;line-height:115%;
font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-bidi-theme-font:minor-bidi;="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">Experiments
have been carried out on a semicircular transparent recirculating fluidized bed
(RCFB) cold model to study the circulation under sticky conditions and to
foresee the likely problems of the actual incinerator operations. It is
observed that the circulation rate decreased with increase in stickiness.
Auxiliary air supplied as downcomer aeration and/or side push below the draft
tube bottom facilitated the solids movement and increased the circulation
rates. Therefore, it is possible to operate the unit at higher stickiness with
proper auxiliary air supply. The problems encountered during the operation of
the RCFB under sticky conditions and the corresponding alterations in the
design of an incinerator are also discussed.</span