Improvements of low load operation and reduction of NO sub x emissions for a pulverized coal boiler

Conference · Mon Jan 01 04:00:00 EST 1990 · Proceedings of the American Power Conference; (United States)

OSTI ID:6025291

Jacquet, L; Thoraval, G; Henon, J; Refait, R ^[1]

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1. Electricite de France (EDF), 75 - Paris (France)

A pulverized coal boiler needs back-up fuel at low load operation. Reduction of threshold below which back-up fuel is necessary allows a more rational and economical management of the generation mix. This was achieved on an EDF 250 MWe coal fired unit: tangential firing type boiler was modified by installing pulverized coal concentrators and a highly efficient flame detection system: thus it is possible to maintain better coal combustion at lower load. Such combustion conditions lead to NO{sub x} reduction, which can be furthermore improved by complementary arrangements (rotating deflectors in vertical mills and gas recycle to burners). This paper presents these various modifications and results obtained.

• OSTI ID: 6025291
• Report Number(s): CONF-9004133--
• Conference Information: Journal Name: Proceedings of the American Power Conference; (United States) Journal Volume: 52
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
BOILERS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COAL
COMBUSTION
CONTROL
ENERGY SOURCES
EXHAUST GASES
FLUIDS
FOSSIL FUELS
FOSSIL-FUEL POWER PLANTS
FUELS
GASEOUS WASTES
GASES
LOAD MANAGEMENT
MANAGEMENT
MATERIALS
MODIFICATIONS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OPERATION
OPTIMIZATION
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POWER PLANTS
PULVERIZED FUELS
RECYCLING
THERMAL POWER PLANTS
THERMOCHEMICAL PROCESSES
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WASTES