Publication detail
Experimental study on the influence of oxygen fraction in the combustion air on the combustion characteristics
BĚLOHRADSKÝ, P. SKRYJA, P.
Czech title
Experimentální studie vlivu koncentrace kyslíku ve spalovacím vzduchu na parametry spalovacího procesu
English title
Experimental study on the influence of oxygen fraction in the combustion air on the combustion characteristics
Type
journal article - other
Language
en
Original abstract
The presented paper was focused on the experimental investigation of a promising combustion technology, namely the oxygen-enhanced combustion (OEC). This technology is used in those industrial heating applications that require increased productivity, higher heat transfer efficiency, improved flame characteristics, reduced equipment cost and last but not least improved product quality. However, there are potential problems associated with the use of OEC if the system is not properly designed, e.g. refractory or burner damage, non-uniform heating and/or increased pollutant emissions. The experimental study of OEC was carried out at the large-scale burner testing facility that enables to test the gaseous fuel burners, the liquid fuel burners and the combined burners up to the thermal input of 1800 kW. The combustion tests were performed with the experimental low-NOx type burner, namely the two-gas-staged burner. The oxygen content in the combustion air was increased by means of the oxygen injection directly into the incoming airstream before entering the burner. The aim of the tests was to assess the impact of oxidizer composition (the volume fraction of oxygen in the combustion air), burner thermal input and gas-staging on the characteristic combustion parameters including the concentration of nitrogen oxides in flue gas, the flue gas temperature, the heat flux to the combustion chamber wall, and lastly the flame stability and its dimensions.
Czech abstract
Prezentovaný článek byl zaměřen na studium velmi slibné spalovací technologie, a to spalování s obohaceným vzduchem (oxygen enhanced combustion (OEC)). Tato technologie je využívána zejména u těch průmyslových aplikacích, které vyžadují zvýšenou produktivitu, vyšší účinnost přenosu tepla, lepší charakteristiky plamene, snížené náklady na zařízení a v neposlední řadě i lepší kvalitu produktu. Avšak existuje i několik potenciální problému spojených s užitím této technologie, pokud není systém správně navržen, např. poškození vyzdívky pece, poškození hořáku, nerovnoměrný ohřev nebo zvýšenou tvorbu emisí. Experimentální studie OEC byla provedena na polo-průmyslové spalovací komoře, která umožňuje testování plynových, kapalných a kombinovaných hořáků do výkonu až 1.8 MW. Spalovací zkoušky byly provedeny s nízkoemisním hořákem, konkrétně s hořákem se stupňovitým přívodem paliva. Obsah kyslíku ve spalovacím vzduchu byl zvyšován prostřednictvím nástřiku vysoce čistého kyslíku do proudu spalovacího vzduchu před vstupem do hořáku. Cílem spalovacích zkoušek bylo vyhodnotit vliv složení okysličovadla (spalovacího vzduchu), výkonu hořáku a stupňovitého přívodu paliva na charakteristické parametry spalování zahrnující tvorbu oxidů dusíku, teplotu spalin, tepelný tok do stěny spalovací komory a v neposlední řadě stabilitu plamene a jeho rozměry.
English abstract
The presented paper was focused on the experimental investigation of a promising combustion technology, namely the oxygen-enhanced combustion (OEC). This technology is used in those industrial heating applications that require increased productivity, higher heat transfer efficiency, improved flame characteristics, reduced equipment cost and last but not least improved product quality. However, there are potential problems associated with the use of OEC if the system is not properly designed, e.g. refractory or burner damage, non-uniform heating and/or increased pollutant emissions. The experimental study of OEC was carried out at the large-scale burner testing facility that enables to test the gaseous fuel burners, the liquid fuel burners and the combined burners up to the thermal input of 1800 kW. The combustion tests were performed with the experimental low-NOx type burner, namely the two-gas-staged burner. The oxygen content in the combustion air was increased by means of the oxygen injection directly into the incoming airstream before entering the burner. The aim of the tests was to assess the impact of oxidizer composition (the volume fraction of oxygen in the combustion air), burner thermal input and gas-staging on the characteristic combustion parameters including the concentration of nitrogen oxides in flue gas, the flue gas temperature, the heat flux to the combustion chamber wall, and lastly the flame stability and its dimensions.
Keywords in Czech
Spalování s obohaceným vzduchem, stupňovité spalování, oxidy dusíku, tepelný tok
Keywords in English
Oxygen enhanced combustion, staged combustion, nitrogen oxides, heat flux
RIV year
2013
Released
29.09.2013
Publisher
AIDIC Servizi S.r.l.
Location
Milano, Italy
ISSN
1974-9791
Volume
35
Number
1
Pages from–to
1147–1152
Pages count
6
BIBTEX
@article{BUT101738,
author="Petr {Bělohradský} and Pavel {Skryja},
title="Experimental study on the influence of oxygen fraction in the combustion air on the combustion characteristics",
year="2013",
volume="35",
number="1",
month="September",
pages="1147--1152",
publisher="AIDIC Servizi S.r.l.",
address="Milano, Italy",
issn="1974-9791"
}