Heating for dry powder gasification feed system
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Why is 0.5 MPa steam used in the dry powder gasification feed system? Can 1.0 MPa superheated steam at 250°C be used instead?
The temperature is too high; isn’t there a risk of the coal powder catching fire on its own? ?
When the temperature is low, coal powder tends to condense; 5 kgf of steam is sufficient.
If the temperature of the heat-tracing steam is too high, volatiles in low-rank coal tend to be released, posing a risk of spontaneous combustion and explosion
The answer is upstairs; your problem isn’t related to transportation, and you can’t resolve the issue of a dry path ahead during the transportation stage
Thank you all for your answers. I don’t have steam with a pressure of 0.5 at the moment; I only have steam with a pressure of 1.0 and 250. I’m considering whether it’s necessary to add another pipeline system with a pressure of 0.5
Use a pressure relief valve to reduce the pressure; don’t let the heat tracing temperature get too high and cause other accidents.
There’s no need for that; it’s a waste of heat. A value of 0.5 is sufficient to ensure stable transportation. Moreover, if the steam pressure is high, the pressure ratings of the pipes, flanges, steam traps, and other related piping components must also be increased, which raises construction costs. An explosion seems unlikely to me, after all, it’s filled with inert gases.