EP 2318489 B1 20150902 - TARGETED REAGENT INJECTION FOR SLAG CONTROL FROM COMBUSTION OF COALS HIGH IN IRON AND/OR CALCIUM
Title (en)
TARGETED REAGENT INJECTION FOR SLAG CONTROL FROM COMBUSTION OF COALS HIGH IN IRON AND/OR CALCIUM
Title (de)
GEZIELTE REAGENZINJEKTION FÜR DIE REDUKTION VON SCHLACKE AUS DER VERBRENNUNG VON EISEN- UND/ODER CALCIUMREICHER KOHLE
Title (fr)
INJECTION DE RÉACTIF CIBLÉ POUR LA COMMANDE DE SCORIES PROVENANT DE LA COMBUSTION DE CHARBONS À TENEUR ÉLEVÉE EN FER ET/OU CALCIUM
Publication
Application
Priority
- US 2009050354 W 20090713
- US 8000408 P 20080711
Abstract (en)
[origin: WO2010006325A1] Disclosed is a process that increases the output of a combustor fired with coal having high iron and/or calcium content, by reducing the tendency of slag to form on heat exchange surfaces and changing the nature of the slag to make it easier to remove. The process includes combusting a slag-forming coal, having high iron and/or calcium content, with an overall excess of oxygen; moving the resulting combustion gases though heat exchange equipment under conditions which cause cooling of slag formed by burning the fuel; and prior to contact with said heat exchange equipment, introducing aqueous aluminum trihydroxide in amounts and with droplet sizes and concentrations effective to decrease the rate of fouling, and preferably, increase the friability of the resulting slag. Desirably, the aluminum trihydroxide reagent is introduced in the form of an aqueous liquid and computational fluid dynamics is employed to determine flow rates and select reagent introduction rates, reagent introduction location(s), reagent concentration, reagent droplet size and/or reagent momentum. In a preferred aspect, the feed rate will up to about 6 pounds ATH per ton and preferably with up to about 2 pounds Mg(OH)2 per ton of coal. A process is also provided for cleaning and maintaining cleanliness of a combustor.
IPC 8 full level
C10L 10/04 (2006.01); C10L 10/06 (2006.01); F23J 7/00 (2006.01)
CPC (source: EP KR US)
C10L 10/04 (2013.01 - EP KR US); C10L 10/06 (2013.01 - EP US); F23C 99/00 (2013.01 - KR); F23J 3/00 (2013.01 - KR); F23J 7/00 (2013.01 - EP US); C10L 2200/0213 (2013.01 - EP US); C10L 2200/0218 (2013.01 - EP US); C10L 2200/0254 (2013.01 - EP US); C10L 2290/141 (2013.01 - EP US); C10L 2290/18 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
WO 2010006325 A1 20100114; AR 072502 A1 20100901; AU 2009268391 A1 20100114; AU 2009268391 B2 20140508; AU 2009268391 C1 20141211; CA 2729959 A1 20100114; CA 2729959 C 20150901; CL 2009001571 A1 20100312; CN 102089413 A 20110608; CN 102089413 B 20131218; CO 6300873 A2 20110721; EP 2318489 A1 20110511; EP 2318489 A4 20130515; EP 2318489 B1 20150902; ES 2554165 T3 20151216; HK 1157810 A1 20120706; JP 2011527000 A 20111020; JP 5657533 B2 20150121; KR 101298932 B1 20130822; KR 20110043656 A 20110427; MX 2011000275 A 20110302; MY 156010 A 20151231; PL 2318489 T3 20160331; RU 2011103846 A 20120820; RU 2493240 C2 20130920; TW 201009067 A 20100301; TW I482852 B 20150501; US 2010006014 A1 20100114
DOCDB simple family (application)
US 2009050354 W 20090713; AR P090102634 A 20090713; AU 2009268391 A 20090713; CA 2729959 A 20090713; CL 2009001571 A 20090710; CN 200980126871 A 20090713; CO 11012993 A 20110204; EP 09795277 A 20090713; ES 09795277 T 20090713; HK 11111996 A 20111107; JP 2011517673 A 20090713; KR 20117003171 A 20090713; MX 2011000275 A 20090713; MY PI20110010 A 20090713; PL 09795277 T 20090713; RU 2011103846 A 20090713; TW 98123559 A 20090710; US 50159009 A 20090713