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

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.
Authors:
; ;
Publication Date:
OSTI Identifier:
1289997
Report Number(s):
9,409,136
14/488,323
DOE Contract Number:
FC21-90MC25140
Resource Type:
Patent
Resource Relation:
Patent File Date: 2014 Sep 17
Research Org:
Southern Company Services, Inc., Birmingham, AL (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 01 COAL, LIGNITE, AND PEAT