Modernizing the boiler installation for unit no. 3 at the Kashirskaya GRES to reduce nitrogen oxide emissions
Journal Article
·
· Power Technology and Engineering
- JSC 'Inzhiniringovaya Kompaniya ZIOMAR', Moscow (Russian Federation)
The purpose of modernizing the Pp-1050-25-545 KGZh (P-50R) boiler is to reduce the emissions of nitrogen oxides (NOx) to levels consistent with modern requirements. The following engineering steps were taken, with liquid slag removal from the boiler, to attain NOx levels of 700-750 mg/m{sup 3} for operation with coal and 125 mg/m{sup 3} for operation with natural gas - three-stage combustion with natural gas as the reducing fuel (about 15% thermal) burning in the recirculating gases; and - use of low-emission coal-dust burners with dust feed at high concentrations, overflow burners, and tertiary draft nozzles to lower the amount of excess air in the active combustion zone. The NOx level was further reduced to 570 g/m{sup 3} (just for operation with coal) by using a selective noncatalytic nitrogen oxide reduction system with injection of ammonia (NH{sub 3}) vapor into the boiler in a zone with temperatures of 950{sup o}C.
- OSTI ID:
- 21095696
- Journal Information:
- Power Technology and Engineering, Journal Name: Power Technology and Engineering Journal Issue: 2 Vol. 42; ISSN 1570-145X
- Country of Publication:
- United States
- Language:
- English
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