Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture
Patent
1984-02-29
1985-09-03
Thomas, Earl C.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
423224, 423230, 423240, 423244, B01D 5334
Patent
active
045391882
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/m.sup.3, the temperature is adjusted to 700.degree. to 1100.degree. C., and the stoichiometric ratio of gas-purifying agent having a particle size d.sub.p 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.
REFERENCES:
patent: 4233276 (1980-11-01), D'Souza et al.
patent: 4346064 (1982-08-01), Leon
Hirsch Martin
Sauer Harald
Schmidt Hans-Werner
Schnabel Wolfram
Metallgesellschaft Aktiengesellschaft
Thomas Earl C.
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