Cement man
22 posts
TimePosted 06/05/2009 01:09:00

Low NOx & High O2!!

Hey,

What do you think the reason of dropping the NOx In our 2000tpd kiln (with preheater and PC system) to 20 to 60 ppm and increasing the Oxygen to more than 4% (In cyclone 5 analyzer)? Our kiln design NOx is 600 to 800 ppm, and oxygen is 2%. To solve this problem ID fan speed was increased, kiln feed was reduced, and kiln speed also was increased but all these actions were useless.  what i cant understand is how NOx can be very low although and at the same time oxygen is veryyy high???

Best regard

 

Reply


Know the answer to this question? Join the community and register for a free guest account to post a reply.

lalbatros
138 posts
TimePosted 06/05/2009 05:53:34
lalbatros says

Re: Low NOx & High O2!!

Flame temperature.
see: http://en.wikipedia.org/wiki/Nitrogen_oxide#Thermal_NOx

Reply

Michael Clark
312 posts
TimePosted 06/05/2009 09:56:00

Re: Low NOx & High O2!!

The most obvious answer would be to check the measurement of the NOx. These symptoms would be encountered if fresh air was leaking into the gas sample line.

Reply