Document Type and Number:
Japanese Patent JPH0341729
Kind Code:
B2
Abstract:
A process for afterburning and purifying process exhaust gases, which contain combustible constituents, wherein the process exhaust gases and the oxygen-containing gases required for a combustion are separately supplied to a fluidized bed reactor of a circulating fluidized bed. In the fluidized bed reactor, the gas velocity is adjusted to 2 to 10 m/s (empty pipe velocity), the mean suspension density is adjusted to 0.1 to 10 kg/m3, the temperature is adjusted to 700 DEG to 1100 DEG C., and the stoichiometric ratio of gas-purifying agent having a particle size dp 50 of 30 to 200 mu m to pollutant contained in the process exhaust gas or formed by the combustion is adjusted to 1.2 to 3.0, calculated as Ca:S. The entrained solids in the gases from the fluidized-bed reactor are recycled to the reactor at a rate of at least 5 times the weight of solids contained in the fluidized bed reactor per hour.
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Application Number:
JP4119884A
Publication Date:
June 25, 1991
Filing Date:
March 02, 1984
Export Citation:
International Classes:
B01D53/50; B01D53/34; B01D53/81; B01J8/24; B01J8/26; B01J8/38; C21B7/00; C22B1/10; F23C10/10; F23G5/30; F23G5/50; F23G7/06; F23J3/04; F27D17/00; G06F7/60; H03K21/00; H03K21/02
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