PROCESS FOR PREPARING HIGH SOLID CONCENTRATION COAL- WATER SLURRY

A pulverized coal slurry containing 5-25 weight percent pulverized coal particles, more than 50 weight percent of the particles being minus 200 mesh, is subjected to flotation for deashing and desulfurizing treatments to thereby recover as froth cleaned coal of 15-30 weight percent concentration. Th...

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Bibliographische Detailangaben
Hauptverfasser:	SHINANO, KUNIZO, KAMAO, MITSUGU, SHIGETOMI, KAZUAKI, NAKAOJI, KAZUHIKO
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL CHEMISTRY DIFFERENTIAL SEDIMENTATION FIRELIGHTERS FLOTATION FUELS FUELS NOT OTHERWISE PROVIDED FOR LIQUEFIED PETROLEUM GAS LUBRICANTS MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS METALLURGY NATURAL GAS PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K TECHNICAL GASES CONTAINING CARBON MONOXIDE TRANSPORTING
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Beschreibung
Zusammenfassung:	A pulverized coal slurry containing 5-25 weight percent pulverized coal particles, more than 50 weight percent of the particles being minus 200 mesh, is subjected to flotation for deashing and desulfurizing treatments to thereby recover as froth cleaned coal of 15-30 weight percent concentration. This froth is dewatered into a high solids concentration coal-water slurry of more than 60 weight percent. This slurry can be transported by pipe flow as a fluid fuel or it can be burned directly in a boiler without need for dewatering. In addition, the high-degree of deashing of the slurry according to the invention enhances combustion efficiency and reduces abrasion of the boiler.