Regarding exhaust gas analysis
Thread Content
We are 5. In a 5m coke oven, waste gas analysis was conducted using the rising flue gas from the coke oven; the oxygen level was around 0.2, carbon dioxide at around 5, carbon monoxide around 0.6, with an excess factor of 1. Around 1. I’m not sure if such a low oxygen level is appropriate; please give me some advice. Also, when taking samples from the fire channel, we use stainless steel tubes – will they react with oxygen? What material do you guys use for your sampling tubes? And how long should the sampling tubes be? Please give me some advice.
When sampling the vertical flue, stainless steel pipes are used, and no one cares about the reaction with oxygen. The sampling location is near the center of the hole where the upward airflow passes, so the length of the tube must be determined based on the thickness of the furnace roof. Oxygen = 0.2, carbon dioxide = 5, carbon monoxide = 0.6; the calculated excess factor isn’t 1.1. How did you do the calculation?
It was taken near the hole where the upward airflow exists; the formula is α=1+K*(O2-0.5CO)/(CO2+CO), and the calculation result is 1. Since it hasn’t been measured before, what could be the reason for an oxygen level of 0.2?
Check the flame combustion; provided the data is accurate, increase the opening of the air inlet to boost suction.