Input control method and means for nitrogen oxide removal means

Details Input control method and means for nitrogen oxide removal means Input control method and means for nitrogen oxide removal means

1976-12-06

1980-02-12

Serwin, R. E.

Chemistry: physical processes

Physical processes

Crystallization

364500, 422 83, 422 94, 422111, G05D 1102

Patent

active

041881907

ABSTRACT:
Method and apparatus for control of input to an apparatus for removal of nitrogen oxides from flue-gas by injection of a nitrogen oxide reducing agent according to which the level of nitrogen oxide concentration in the flue-gas can be selectively determined in reference to different factors relating to a combustion process, a first value indicating the amount of nitrogen oxide reducing agent to be injected is calculated on the basis of the determined level of nitrogen oxide concentration, and this first value is modified in accordance with nitrogen oxide removal efficiency actually achieved, and the rate of supply of the nitrogen oxide reducing agent is adjusted in accordance with the modified value obtained, whereby more precise and reliable input control is achieved.

REFERENCES:
patent: 3721253 (1973-03-01), Remke et al.
patent: 3960507 (1976-06-01), Tsujikawa et al.
patent: 4038032 (1977-07-01), Brewer et al.
Savas, "Computer Control of Industrial Processes", McGraw-Hill, (1965) pp. 20-27, 52 and 53.

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