EP 2597367 A4 20141029 - DENSE-PHASE SWIRL PULVERIZED COAL BURNER
Title (en)
DENSE-PHASE SWIRL PULVERIZED COAL BURNER
Title (de)
KOHLENSTAUBBRENNER MIT WIRBEL FÜR DICHTE PHASEN
Title (fr)
BRÛLEUR À CHARBON PULVÉRISÉ À TOURBILLON À PHASE DENSE
Publication
Application
Priority
- CN 201180139317 A 20110527
- CN 2012071214 W 20120216
Abstract (en)
[origin: US2013112120A1] A dense phase swirl pulverized coal burner comprises a primary air channel, a direct flow secondary air channel and a outermost swirl secondary air channel; and multiple levels of pulverized coal concentration rings are arranged axially at intervals along the oil gun casing in a straight tube section of the primary air channel, so that pulverized coal air flow is distributed thickly outside and thinly inside the primary air nozzle. In the invention, dense phase pulverized coal outside the primary air nozzle passes through guide vanes, forms disturbed flow, is ejected into a furnace and mixes with high temperature backflow flue gas rapidly and sufficiently at an outlet. Meanwhile, dilute pulverized coal air flow at the center is ejected into the furnace by direct flow, ensuring subsequent mixing and combustion of pulverized coal flow. The primary air nozzle and the secondary air nozzle are provided with cone flaring structures with certain angle to effectively control appropriate mixing of secondary air and pulverized coal. The invention has advantages of strong ignition and combustion stability, good coal adaptability, low nitric oxide emission, simple primary air channel structure and small resistance, which effectively slows wear rate of parts.
IPC 8 full level
F23D 1/02 (2006.01)
CPC (source: EP US)
F23D 1/005 (2013.01 - US); F23D 1/02 (2013.01 - EP US); F23D 2201/20 (2013.01 - EP US)
Citation (search report)
- [XYI] CN 101832550 A 20100915 - UNIV SHANGHAI JIAOTONG
- [Y] CN 102062396 A 20110518 - UNIV XI AN JIAOTONG
- [A] US 2380463 A 19450731 - POOLE ARTHUR J
- [A] US 4951581 A 19900828 - WIEST MICHAEL R [US]
- [A] US 3256842 A 19660621 - EUGENE VIGNERON CLAUDE CHARLES, et al
- [A] CN 1439842 A 20030903 - UNIV HARBIN POLYTECHNIC [CN]
- See references of WO 2012163107A1
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
DOCDB simple family (publication)
US 2013112120 A1 20130509; EP 2597367 A1 20130529; EP 2597367 A4 20141029
DOCDB simple family (application)
US 201213808119 A 20120216; EP 12792844 A 20120216