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Title: High pressure feeder and method of operating to feed granular or fine materials

Patent ·
OSTI ID:1289997
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A coal feed system to feed pulverized low rank coals containing up to 25 wt % moisture to gasifiers operating up to 1000 psig pressure is described. The system includes gas distributor and collector gas permeable pipes imbedded in the lock vessel. Different methods of operation of the feed system are disclosed to minimize feed problems associated with bridging and packing of the pulverized coal. The method of maintaining the feed system and feeder device exit pressures using gas addition or extraction with the pressure control device is also described.

Research Organization:
Southern Company Services, Inc., Birmingham, AL (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FC21-90MC25140
Assignee:
Southern Company Services, Inc. (Birmingham, AL)
Patent Number(s):
9,409,136
Application Number:
14/488,323
OSTI ID:
1289997
Resource Relation:
Patent File Date: 2014 Sep 17
Country of Publication:
United States
Language:
English

References (11)

Apparatus for introducing particulate material into a vessel patent May 1978
Dry piston coal feeder patent February 1979
Desulfurization and improvement of combustion and gasification characteristics of coals patent May 1983
Dry solids pump system for feeding a high pressure combustor patent October 1996
Solid fuel combustion method and apparatus for the conversion of waste into useful energy patent-application December 2003
Method and device for the regulated feed of pulverized fuel to an entrained flow gasifier patent-application April 2007
Method and Apparatus for Continuously Feeding and Pressurizing a Solid Material Into a High Pressure System patent-application December 2007
Use of Pure Carbon Dioxide as an Inerting and Flow Medium in Powder Injection Systems for Use in Pulverized Coal Gasification Under Pressure patent-application June 2010
Method and Apparatus for Producing Synthesis Gas from Biomass patent-application November 2010
Continuous Fuel Supply for a Coal Gasification Reactor patent-application May 2011
Method and System for Supplying a Reactor for Generating Crude Synthesis Gas patent-application September 2011

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Related Subjects

42 ENGINEERING
01 COAL, LIGNITE, AND PEAT