Analysis of the reasons for abnormal composition in Texaco gasifiers
Thread Content
The pressure difference at the burner of the Texaco gasifier and the pressure difference at the slag outlet remained unchanged, while carbon monoxide levels increased, rising from 42 to 48
Coal quality, oxygen-to-carbon ratio, and slurry concentration are all relevant
Has carbon monoxide increased, and has carbon dioxide decreased? By how much has it dropped? Is your oxygen-to-coal ratio too low, resulting in incomplete combustion? It is recommended that you check whether the amount of residual carbon in the slag has increased. There are many possible reasons, so a comprehensive analysis is needed; the information you have provided is insufficient
The oxygen-to-coal ratio didn’t change much, and the furnace temperature also remained stable. The carbon dioxide level was 16. Both furnaces were operating normally, while there was no change in the other furnace; this makes it possible to rule out issues related to the quality of the coal or the concentration of the coal slurry
Coal quality, slurry concentration, oxygen-to-coal ratio, furnace temperature, etc., all have an impact.
I think there is still a problem with the burner atomization
We have also encountered situations where the normal effective gas composition was between 76 and 79, while the CO level reached 50; in such cases, the effective gas composition would manually reach 85 online. Adding some oxygen and raising the furnace temperature would solve the problem.
Well, there’s nothing else to do. In a situation like this, I think it’s okay not to make any adjustments and to wait and see; the value might drop on its own. I still think there’s something wrong with the burner’s atomization – I just can’t come up with a reasonable explanation for it
In our case, this situation is usually caused by the burnout of the rising/descending pipe!
It probably has nothing to do with atomization; the main issue is the change in coal type. It’s the composition of the coal that plays a decisive role. Without detailed test reports for comparison, things are in a mess at our company – we don’t know what’s going on with the coal that’s fed into the furnace every day