Are there any requirements for coal in the water-coal slurry process?
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Which expert knows what requirements coal must meet in terms of quality to be used in the water-coal slurry process for coal gas production?
Yes, the most important requirement is that 1. it should have good pulping properties; otherwise, the gasification efficiency will be low； 2. Since pressurized gasification of water-coal slurry involves liquid slag discharge, there are requirements regarding the ash melting point of the coal; those with a melting point above 1350°C require the use of solubilizers
Coal water slurry gasifiers are classified into refractory brick gasifiers and water wall gasifiers depending on the type of combustion chamber; refractory brick gasifiers have requirements regarding the volatiles and ash melting point of the coal, while water wall gasifiers have no such requirements； The choice of coal type depends on the company’s habits; some prefer to use high-quality coal, which results in lower consumption ； Some make their choice based on cost efficiency, using coal from where it is cheaper.