Method of removing nitrogen oxides from hot flue gases

Details Method of removing nitrogen oxides from hot flue gases Method of removing nitrogen oxides from hot flue gases

1994-04-29

1995-09-26

Lander, Ferris

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

C01B 2104

Patent

active

054532582

ABSTRACT:
In the device for selective non-catalytic reduction of nitrogen oxides, a liquid nitrogen-containing reducing agent is sprayed through two-component lances into a stream of hot flue gases. Spraying occurs in pulsatory operation at a frequency of 5 to 70 per second, preferably 10 to 20 per second. As a result of this mode of operation, a spray cone of relatively coarse long-range drops and a spray cone of relatively fine short-range drops are produced alternately at each two-component nozzle. The reducing agent is ammonia dissolved in water (ammonia solution) at flue-gas temperatures of 1060.degree. C. to 1170.degree. C. The device for working the method comprises a flue-gas duct 3 incorporating a number of two-component lances 4 operated by a pressure medium. The liquid and gas feed pipes for each two-component nozzle lance 4 are connected to a first resonance chamber 15 disposed in the two-component nozzle and upstream of at least one additional resonance chamber 18 separated from the first resonance chamber 15 by a restrictor 17. The last resonance chamber 18, considered in the direction of flow, is then directly connected to the outlet opening 19 of the two-component nozzle.

REFERENCES:
patent: 4205786 (1980-06-01), Babich et al.
patent: 4213945 (1980-07-01), Haese et al.
patent: 4241877 (1980-12-01), Hughes
patent: 4263166 (1981-04-01), Adams
patent: 4842834 (1989-06-01), Burton
patent: 4963332 (1990-10-01), Brand et al.
patent: 5199255 (1993-04-01), Sun et al.

Affiliated with

Also associated with

Rating

Method of removing nitrogen oxides from hot flue gases does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of removing nitrogen oxides from hot flue gases, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of removing nitrogen oxides from hot flue gases will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1550878