Oxygen/coal ratio for various furnace types
Thread Content
Could experts provide the oxygen/coal ratio for various furnace types? For example, those with SHELL GE 4 nozzles, Texaco nozzles, and so on. This post was last edited by liuze78 on 2008-3-14 at 11:09.]
I only know that the specific oxygen consumption of the Texaco coal feeding furnace is around 400, while the specific coal consumption is around 600
The oxygen-to-coal ratio generally has a certain relationship with the quality of the coal.
In addition to what was mentioned on the third floor, the oxygen-coal ratio is also related to the gasification process, gasification pressure, and gasification temperature. The key lies in the gasification process and the type of coal used for gasification.
Texaco’s is between 0.9 and 1.05
In terms of gasification, the oxygen-coal ratio is not meaningful; what is generally referred to are the specific oxygen consumption and specific coal consumption. Since the type of coal varies and the reaction conditions differ, the consumption amounts also change, and it is necessary to determine these values based on heat balance and mass balance calculations
I’m sorry, I got it wrong; the price for Texaco is between 0.9 and 1.03. Sorry about that
For Texaco, it ranges from 0.9 to 1.03, and this refers to the ratio of the number of oxygen atoms to the number of carbon atoms. 400-500 refers to the volume ratio of oxygen to coal slurry
It is inappropriate to speak generally about the oxygen-coal ratio for a certain type of furnace. Apart from differences in furnace design leading to varying oxygen-coal ratios, factors such as different types of coal (especially differences in moisture and ash content), different gasification pressures, and different furnace temperatures can also result in variations in the oxygen-coal ratio. Therefore, when discussing or comparing oxygen-coal ratios, it is necessary to specify factors such as the type of coal, gasification pressure, and the operating temperature of the gasification furnace
The oxygen-to-coal ratio in Shell operations changes with the load; as the load increases, this ratio decreases； The driving phase is controlled by the driving curve; once normal operation is achieved, cascade control is activated, with regulation based on carbon dioxide levels or the amount of steam supplied. The ratio is generally between 0.7 and 1.1.
The control of the oxygen-to-coal ratio depends mainly on factors such as coal quality, oxygen purity, and slurry concentration; it cannot be determined universally, and it is even related to the operating conditions of the gasifier, so it cannot be a fixed value.
That’s what I mean too; if no specific type of coal is specified, the oxygen-to-carbon ratio should be used instead
The oxygen-coal ratio is a term used for this purpose; the common industrial term is the amount of oxygen consumed per thousand cubic meters of CO+H2. For water-coal slurry (such as Texaco), the oxygen consumption per thousand cubic meters of CO+H2 is around 400 m3. For dry coal powder (such as Shell), it is 360 m3 per thousand cubic meters of CO+H2. Fluidized beds have relatively lower values
The oxygen-to-coal ratio, or the level of oxygen consumption, has a significant impact on the cost of gas
SHELL: 0.8~1.3, varying depending on the load.
The oxygen-coal ratio for Lurgi furnaces is roughly around 0.2. I agree with the opinions expressed above; simply talking about the oxygen-coal ratio doesn’t have much meaning. What’s usually referred to are the oxygen consumption ratio and coal consumption ratio. Since the type of coal varies and the reaction conditions differ, the consumption levels also change