Apparatus for preheating a rotatable fluidizable bed

Heating – Tumbler-type rotary - drum furnace – Having combustion products generated in or fed to drum

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431 7, 60 3946S, 60 3935, 432117, 432 58, F27B 708, F27B 710, F27B 1500

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active

042551358

ABSTRACT:
PCT No. PCT/US79/00945 Sec. 371 Date Nov. 5, 1979 Sec. 102(e) Date Nov. 5, 1979 PCT Filed Nov. 5, 1979
A rotatable fluidizable bed (106) comprises means for rotating the bed chamber (112) slowly to cause the particles (114) to slowly tumble and mix. During tumbling, one or more burners (150, 160) extending into the chamber (112), heat the particles (114) until the desired operating or ignition temperature is reached. Temperature sensors (170) in thermal communication with the bed particles (114) sense the temperature and provide either an indication thereof or an initiating signal which, in the case of a rotating fluidized bed combustor (10), terminates preheating, accelerates the bed chamber (112) rotation to normal combustor (10) operating speed and/or introduces fluidizing air and/or fuel flow through the bed chamber (112).

REFERENCES:
patent: 3039753 (1962-06-01), Eketorp et al.
patent: 3888621 (1975-06-01), Williams
patent: 4039272 (1977-08-01), Elliott
patent: 4137706 (1979-02-01), Clarke
patent: 4148186 (1979-04-01), Virr
patent: 4161103 (1979-07-01), Horgan et al.
patent: 4177636 (1979-12-01), Horgan
patent: 4183208 (1980-01-01), Horgan et al.

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