Oxygen injection into the converter
Thread Content
Dear experts, what is the minimum safe oxygen supply load for a converter? Do you have actual data? Also, what unsafe effects might there be from supplying oxygen at too low a level, such as 20%?
What do you mean by the safe oxygen loading you mentioned? Coke oven gas flow rate? Oxygen injection into coke oven gas at a level of 8000 should be feasible; lower levels have not been tried. However, I believe the most important factors are the diameter of the small valve used for oxygen injection and the pressure difference controlled during oxygen injection. In other words, once the valve is opened, it’s necessary to know what the oxygen flow rate is, and based on this flow rate, it’s possible to determine the lowest load that can be maintained with the coke oven gas. Personal opinion.
The amount of coke oven gas used for oxygen injection depends mainly on the concentration of the combustible gas in the steam stream, and whether it can reach the explosive limit of that combustible gas.
40% of the total load; reduce oxygen supply when the load is low
I tried adding oxygen when using 5 kilograms of coke oven gas; at that time, there was a problem with the medium-pressure steam, and its pressure couldn’t be increased. Keep the traffic at 8,000.
Thank you all. By \"load,\" I mean the flow rate of coke oven gas. We produce 200,000 tons of methanol; the designed flow rate of coke oven gas is 53,000, while the flow rate during oxygen injection is generally around 12,000. Coking isn’t working well at the moment – there isn’t enough gas from the coke ovens. I’d like to ask everyone: is it possible to supply oxygen at a rate of 8,000, and is safety guaranteed? What negative consequences could there be if it’s done?
It should not be lower than 40% of the load.
8,000 cubic meters of coke oven gas, around 700 cubic meters of oxygen; the temperature of the oxygen-rich steam is around 140 degrees. With these parameters, there’s no problem!
At the beginning of feeding, the ratio of oxygen to coke oven gas was kept below 2
Reply to 6# duanry2003: What is the steam volume of your conversion system?
Some experiences can be learned – such as determining the appropriate oxygen pressure – but things aren’t set in stone; one needs to know how to adapt. In some places, an oxygen pressure of 2.0 megapascals is still sufficient for oxygen supply, and nothing bad happens in those cases. However, it’s not recommended to do that, as there are still risk factors involved. It’s important to be innovative, but one must also follow the principles of chemical engineering, especially in high-risk chemical industries