Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – Waste gas purifier
Patent
1989-06-20
1991-03-12
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Chemical reactor
Waste gas purifier
55222, 55DIG30, 110215, 261138, 261149, 261DIG9, 422172, 422173, C10K 108, C10K 134
Patent
active
049991671
ABSTRACT:
Exhaust gases from a process fired boiler are diverted from a stack prior to emission to the atmosphere through a duct system to a plurality of series connected heat exchangers. The exhaust gases are progressively reduced from an elevated temperature, for example in the range between about 350.degree.-525.degree. F., in stages to an ambient temperature of about 50.degree. F. At each stage heat from the exhaust gases is transferred from the gases to another medium, such as water, which is fed back to the boiler to reduce the energy cost of operating the boiler. At ambient temperature the exhaust gases are subjected to an atomized spray of a reagent solution that absorbs the contaminants in the exhaust gases. Absorption of the contaminants into solution with the atomized reagent spray is promoted by contact of the spray and exhaust gases on the surface of a fibrous batting. With the exhaust gases at ambient temperature the percentage of contaminants in the flue gas that enters into solution with the reagent is substantially increased. Thus the reagent absorbs the contaminants, and the exhaust gases are emitted after further moisture separation substantially free of contaminants.
REFERENCES:
patent: 3473298 (1969-10-01), Berman
patent: 3775948 (1973-12-01), Beam
patent: 3881004 (1975-04-01), Kelly et al.
patent: 3960992 (1976-06-01), Cyrenne
patent: 4121541 (1978-10-01), Kneissl et al.
patent: 4681744 (1987-07-01), Weitman
patent: 4784835 (1988-11-01), Fritz
patent: 4799941 (1989-01-01), Westermark
Perry & Chilton, Chemical Engineers' Handbook, 5th Edition, pp. 12-5 through 11-8 and 18-82 through 18-85.
"NO.sub.x Emissions Plummeted Far Below Minimum EPA Standards With No Increase in Fuel Needs" by H. Dain Kelly, Charles Block and Karen L. Kuncl; Chemical Processing, Jan. 1977, pp. 22-24.
McMichael James C.
Skelley Arthur P.
Johnston Jill
Warden Robert J.
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