Liquid purification or separation – Processes – Chemical treatment
Patent
1979-03-30
1980-11-18
Hart, Charles N.
Liquid purification or separation
Processes
Chemical treatment
60 3905, 162 31, 210181, 210198R, 210774, C02F 174, C02F 1108
Patent
active
042344239
ABSTRACT:
The present invention is directed to an improved wet air oxidation system and method for reducing the chemical oxygen demand (COD) of waste water used from scrubbers of coal gasification plants, with this COD reduction being sufficient to effectively eliminate waste water as an environmental pollutant. The improvement of the present invention is provided by heating the air used in the oxidation process to a temperature substantially equal to the temperature in the oxidation reactor before compressing or pressurizing the air. The compression of the already hot air further heats the air which is then passed in heat exchange with gaseous products of the oxidation reaction for "superheating" the gaseous products prior to the use thereof in turbines as the driving fluid. The superheating of the gaseous products significantly minimizes condensation of gaseous products in the turbine so as to provide a substantially greater recovery of mechanical energy from the process than heretofore achieved.
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patent: 2824058 (1958-02-01), Zimmermann
patent: 2903425 (1959-09-01), Zimmermann
patent: 2944396 (1960-07-01), Barton et al.
patent: 2949010 (1960-08-01), Cederquist
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Zimmermann, "New Waste Disposal Process," Chem. Eng., Aug. 25, 1958, 117-120.
Teletzke, "Wet Air Oxidation," Chem. Eng. Prog., Jan. 1964, pp. 33-38.
Moore Albert S.
Verhoff Francis H.
Denny James E.
Hamel Stephen D.
Hart Charles N.
Hruskoci Peter A.
Larcher Earl L.
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