Use of a mixture of carbon dioxide and nitrogen as an inerting and flow medium in powder injection systems for use in pulverized coal gasification under pressure

The invention relates to a powder injection system for use in pulverized coal gasification under pressure, which system comprises a reservoir (BK) for stocking the pulverized coal, a plurality of powder injection tubes (SES) and a metering unit (DG). According to the invention, a mixture of nitrogen...

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Bibliographische Detailangaben
Hauptverfasser:	TIETZE GUENTER, SCHINGNITZ MANFRED
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CARBURETTING AIR OR OTHER GASES CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS FUELS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS LUBRICANTS METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROMSOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES TECHNICAL GASES CONTAINING CARBON MONOXIDE TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE
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Beschreibung
Zusammenfassung:	The invention relates to a powder injection system for use in pulverized coal gasification under pressure, which system comprises a reservoir (BK) for stocking the pulverized coal, a plurality of powder injection tubes (SES) and a metering unit (DG). According to the invention, a mixture of nitrogen N2 / carbon dioxide CO2 is fed to the components that are at operating pressure, namely the powderinjection tube and the metering unit, as the inerting and flow medium or fluidizing medium. The nitrogen N2 / carbon dioxide CO2 mixture-carrying components are heated in such a manner that the temperature is above the threshold of the diphase range.; The method according to the invention allows reduction of the nitrogen content in the product gas, which nitrogen is caused by the powder injectionsystem, especially when used in pulverized coal gasification under pressure to produce a synthesis gas for the production of different hydrocarbons.