Reduction of NO.sub.x emissions from rotary cement kilns by sele

Details Reduction of NO.sub.x emissions from rotary cement kilns by sele Reduction of NO.sub.x emissions from rotary cement kilns by sele

1996-04-10

1998-03-17

Lewis, Michael

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

B01J 800

Patent

active

057283575

ABSTRACT:
The use of urea injection SNCR is enabled for rotary kilns of the type used to produce cement clinker. Rotary kilns are long cylinders that rotate about an inclined axis, with cement premix fed in at one end and a burner for heat at the other end. The geometry of the kilns and temperatures at the ends make introduction of ammonia or urea solutions ineffective or totally impractical. Urea prills can be injected at an initial velocity of at least 25, typically greater than 100, meters per second to reach into the kiln where a suitable temperature window for NO.sub.x reduction can be found.

REFERENCES:
patent: 3900554 (1975-08-01), Lyon
patent: 4080218 (1978-03-01), Mori et al.
patent: 4154803 (1979-05-01), Uchikawa et al.
patent: 4208386 (1980-06-01), Arand et al.
patent: 4325924 (1982-04-01), Arand et al.
patent: 4719092 (1988-01-01), Bowers
patent: 4842834 (1989-06-01), Burton
patent: 4915036 (1990-04-01), DeVita
patent: 4992249 (1991-02-01), Bowers

Affiliated with

Also associated with

Rating

Reduction of NO.sub.x emissions from rotary cement kilns by sele does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Reduction of NO.sub.x emissions from rotary cement kilns by sele, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduction of NO.sub.x emissions from rotary cement kilns by sele will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-955182