How adaptable is this coal type to Texaco?
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The moisture content is 11.9%, the ash content is 5.10%, the volatile matter content is 29.51%, and the fixed carbon content is 53.49%. The ash fusion point is 1280, and the slurry formation rate is between 55–60%. Is coal with such properties suitable as a raw material for Texaco’s water-coal slurry gasification process in actual production? Is a low slurry formation rate a common problem encountered with Texaco’s furnace models these days? Is the Texaco furnace model suitable? How should production proceed if there is an excessive amount of ash, high internal moisture, and a lower pulp formation rate? I hope experts in this field can provide some guidance
Experts from Texaco, please give some advice!
1/ The ash content seems a bit high, which affects the gasification efficiency. 2/ The ash melting point is acceptable. 3/ The issue of slurry formation can be adjusted using coal slurry additives, though only within certain limits. 4/ It can be burned together with higher-quality coal to reduce coal costs. 5/ The sulfur content wasn’t mentioned, and this parameter is quite important for the subsequent processing steps. Just sharing my thoughts; feel free to correct me if I’m wrong.:)
If the moisture is in the form of free water, the moisture content is not high; but if it is bound water, then the moisture content is quite high； The ash content is not high; the ash fusion point is somewhat high. With such a high ash fusion point, the operating temperature inside the gasification furnace must be above 1400 degrees ； The slurry formation rate is a bit low; appropriate adjustments can be made to the slurry formulation by using suitable additives. Currently, it is generally required that the coal slurry concentration be maintained at over 58%
5.1% ash content shouldn’t be considered high, right? Relevant experts say that less than 15% should be fine ； Sulfur content
The total moisture content is roughly the same (from the perspective of pulp formation, the internal moisture level might be a bit high), and the ash content is also acceptable (experts determine these values based on theoretical limits, without considering economic factors). The ash fusion point is high; this has a significant impact on slag discharge and is quite important. The S content is required for future purification equipment. The pulping quality is somewhat poor; 58 is a relatively low concentration.
I misread the ash content; my apologies. 5.1% isn’t high. The moisture level likely refers to the external moisture, which is also acceptable. I’m not sure what product is obtained from the syngas in this case; if methanol is being produced, the desulfurization requirement will definitely be high. With current strict environmental regulations, dealing with the sulfur removed is also quite troublesome. 0.5% sulfur isn’t high either – this is a good quality coal. Last edited by Dopoda on 2009-3-31 at 12:17
The role of sulfur is to poison the catalyst for conversion.
This type of coal is suitable for Texaco water-coal slurry gasification; it’s not clear whether the moisture present is internal or external. If it’s all internal moisture, then the level is a bit high! @ The other indicators are fairly good, especially the ash content. It is recommended to find another type of coal with a lower ash fusion point, as using it in combination would be optimal!
I’ll give a brief answer: 1. This coal is the preferred type for Texaco’s technology; its parameters are excellent, making it very useful! Only water – if it’s internal water, then the level is a bit high; the consistency becomes slightly worse. What about the calorific value? I guess it’s around 28. The test results are acceptable! 2. Pulpability is related only to coal, and has nothing to do with the type of furnace or the technical methods used!
The moisture content should be the total moisture level; all other parameters are good. The ash fusion point is 1280, and the vaporization temperature is likely around 1340 – it’s impossible to reach 1400. Personally, I think it’s quite suitable for Texaco