Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Sulfur or sulfur containing component
Patent
1985-06-10
1986-07-15
Heller, Gregory A.
Chemistry of inorganic compounds
Modifying or removing component of normally gaseous mixture
Sulfur or sulfur containing component
423242, 422 62, B01J 800, C01B 1700
Patent
active
046005706
ABSTRACT:
A process for effecting the continuous desulphurization of stack gases includes a double loop computerized system (10) for continuously effecting the desulphurization. The stack gases are passed through heat exchangers (14, 15) to raise the temperature to approximately 700.degree. F., the first heat exchanger (14) receiving hot desulphurized exit gas from a reactor (27) and the second heat exchanger (15) receiving preheated SO.sub.3 rich flue gases from a catalytic converter (17). The stack gases heated to 700.degree. F. are passed through a preheater burner (16) to increase the temperature to about 850.degree. F. and then transmitted through the catalytic converter (17) to convert most of the sulphur dioxide to sulphur trioxide. The sulphur trioxide rich flue gas is recirculated through the second heat exchanger (15) in order to cool the flue gas, and then fed to the reactor (27) which receives either calcium oxide, calcium carbonate, or both in order to effect SO.sub.x removal. The reaction product(s) is quenched to crack the outer shell of calcium sulphate, and then may be selectively resupplied to the reactor (27) or to storage (21, 51). A computerized controller (50) responds to a probe (40) to selectively control the supply of the calcium oxide, calcium carbonate, and resupply of reaction products to the reactor (27). Desulphurized exit gas from the reactor (27) passes through the first heat exchanger (14) for cooling and then through a particle separator (30) before exiting the system (10).
REFERENCES:
patent: 3781408 (1973-12-01), Lin
patent: 3855125 (1974-12-01), Lin
patent: 3861930 (1975-01-01), Lin
patent: 4054463 (1977-10-01), Lin
patent: 4171951 (1979-10-01), Lin
patent: 4229411 (1980-10-01), Kisters et al.
patent: 4293521 (1981-10-01), Isahaya et al.
patent: 4322224 (1982-03-01), Roth
patent: 4387078 (1983-06-01), Lin
patent: 4470921 (1984-09-01), Lin
patent: 4482096 (1984-11-01), Lin
"SO.sub.x Removal and Acid Neutralization With Its By-Product", by Ping-Wha Lin, Environmental Science and Technology, vol. 12, p. 1081, Sep. 1978.
"Hydration Enhanced Sulfation of Limestone and Dolomite in the Fluidized-Bed Combustion of Coal", by S. A. Shearer et al., APCA Journal, vol. 30, No. 6, Jun. 1980.
Heller Gregory A.
Palguta Larry J.
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