Emission control system for an oil-fired combustion process

Details Emission control system for an oil-fired combustion process Emission control system for an oil-fired combustion process

1992-02-05

1993-11-23

Price, Carl D.

Combustion

Process of combustion or burner operation

Heating feed

431 12, 431208, F23D 1144

Patent

active

052638502

ABSTRACT:
A system for the for the control of exhaust gas emissions, such as NO.sub.x and SO.sub.x, from an oil-fired burner is disclosed. In the system, a heavier, less expensive grade of fuel oil, such as #6 oil, is burned, and the emissions from the burner are continuously monitored. If the concentration of NO.sub.x and/or SO.sub.x in the exhaust gas is greater than a predetermined threshold concentration, a lighter, more expensive grade of fuel oil, such as #2 oil, is blended with the heavier oil to reduce the concentration of NO.sub.x and/or SO.sub.x. A control valve in the lighter grade fuel oil line is controlled automatically in response to the measured concentration of NO.sub.x and/or SO.sub.x to blend into the heavier oil only the necessary amount of lighter oil. Thus, if the concentration of NO.sub.x and/or SO.sub.x in the exhaust gases from the blended oils is less than the predetermined threshold concentration, less of the lighter oil is blended with the heavier oil. In this manner, a cost efficient use of available fuel oils is obtained and predetermined exhaust gas limits are achieved.

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