There are always* * What's the reason for the noise?
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This post was last edited by Happy Island on 2010-7-26 13:26 We are a coke oven gas-to-methanol enterprise and have been in normal production for three years. However, in the past two months, there has always been a problem in our company's reformer.* * The sound is very loud, sometimes several times in one shift. When we parked, we opened the small cover of the reformer and inspected the interior. No problems were found. The oxygen distributor was not damaged. Our oxygen distributor is made of corundum bricks. It made the sound even when there was no load increase or decrease. The ratio of coke oven gas, oxygen and steam was also normal. Can you please point it out?
The oxygen distributor is filled with corundum bricks. The oxygen distribution is uneven and small explosions occur locally. Is this correct?
Reply 2# Dayazhitang agrees with the statement above. Oxygen should be burned completely in the combustion space, but due to uneven oxidation distribution, secondary combustion occurs, that is, mixed combustion or explosion and intermittent abnormal sounds occur at the same time. The above is for reference.
It should be caused by uneven distribution.
The downward movement of the catalyst bed should be the main reason for uneven distribution.
friend : Is the outlet temperature of the preheating furnace too low, causing a small explosion in the combustion space?
The oxygen distribution is uneven. It would be better to change it to a burner.
How about increasing the steam in the oxygen and mixing it thoroughly? Give it a try?
Excuse me: What is the ratio of oxygen to gas during normal operation of a reformer with a central burner? 1:1?
Reply 9# tzy_02598 Under normal circumstances, the flow rate of oxygen-vapor mixture for metal burners is about 70 meters/second, and that of non-metal burners is about 30 meters/second. You can calculate it based on the gas equation of state. Some manufacturers have a built-in formula in the DCS to directly display the flow rate on the screen.
1. The oxygen outlet hole of the corundum distributor is not smooth. 2. Oxygen penetrates through the cracks in the refractory lining. 3. The furnace entry temperature is low. 4. Scale buildup in the jacket.