WO2011088538A1 - SYSTÈME DE COMBUSTION DE GAZ NATUREL POUR LE CONTRÔLE DES CORRÉLATIONS ENTRE RAYONNEMENT THERMIQUE, FORMATION DE SUIES ET DE NOx LORS DE L'UTILISATION DE LA COMBUSTION ENRICHIE À L'OXYGÈNE - Google Patents

SYSTÈME DE COMBUSTION DE GAZ NATUREL POUR LE CONTRÔLE DES CORRÉLATIONS ENTRE RAYONNEMENT THERMIQUE, FORMATION DE SUIES ET DE NOx LORS DE L'UTILISATION DE LA COMBUSTION ENRICHIE À L'OXYGÈNE Download PDF

Info

Publication number
WO2011088538A1
WO2011088538A1 PCT/BR2011/000025 BR2011000025W WO2011088538A1 WO 2011088538 A1 WO2011088538 A1 WO 2011088538A1 BR 2011000025 W BR2011000025 W BR 2011000025W WO 2011088538 A1 WO2011088538 A1 WO 2011088538A1
Authority
WO
WIPO (PCT)
Prior art keywords
soot
oxygen
thermal radiation
combustion
nox
Prior art date
Application number
PCT/BR2011/000025
Other languages
English (en)
Portuguese (pt)
Inventor
Alex Álisson BANDEIRA SANTOS
Ednildo Andrade Torres
Pedro Afonso De Paula Pereira
Original Assignee
Serviço Nacional De Aprendizagem Industrial-Senai/Dr-Ba
Universidade Federal De Bahia
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Serviço Nacional De Aprendizagem Industrial-Senai/Dr-Ba, Universidade Federal De Bahia filed Critical Serviço Nacional De Aprendizagem Industrial-Senai/Dr-Ba
Publication of WO2011088538A1 publication Critical patent/WO2011088538A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/003—Systems for controlling combustion using detectors sensitive to combustion gas properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/12—Burner simulation or checking
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • the present invention relates to a system for controlling the correlations between thermal radiation, soot and NOx formation in oxygen enriched combustion to enable the control of the increase of heat transfer by radiation by the flame through the formation of the soot and consequently the control of the NOx emission due to the reduction of the flame temperature.
  • Energy efficiency is one of the fundamental points for the reduction of greenhouse gases emitted from industrial combustion processes.
  • the industrial burners are therefore one of the main equipment that must have its thermal efficiency implemented in order to reduce the consumption of fuels, as well as reduce the emission of polluting gases and greenhouses. Numerous techniques are used for this, such as staggered firing, burners with air injection with swirl and gas recirculation.
  • the energy efficiency achieved is not always sufficient to reduce fuel consumption to the required levels in the current situation.
  • the increase in thermal radiation can reduce the flame temperature, thereby reducing the formation of NOx in the flame, which is an important pollutant of the atmosphere, having effects on depletion of the ozone layer, greenhouse effect as well as formation of ozone in the troposphere.
  • soot particles can exert both beneficial and harmful roles.
  • the presence of particulate matter in gas turbines can severely affect the lifetime of the blades and, in diesel engines, the absorption of carcinogenic materials constitutes a risk to human health
  • the presence of soot increases heat transfer by thermal radiation from the flame to the exchange surfaces.
  • Oxygen one of the possible oxidants of soot, is a gas of great use in industrial activity, and constitutes a reasonable proposal of a possible additive.
  • a natural gas combustion system for the control of the correlation between thermal radiation formation of soot and NOx with the use of oxygen enriched combustion has as monitoring parameters the concentration of soot and NOx and the thermal radiation in diffuse flames in a chamber of horizontal cylindrical combustion, for various operating conditions.
  • U.S. Patents 5,196,866, 5,256,058 and 5,336,390 present burners and methods for the production of light flares. All these patents use the technique of enriching the combustion with O2.
  • the fuel used in the required system was natural gas, a fuel gas with a low tendency to soot. Enrichment levels corresponding to oxygen contents of 23 and 25%, below 30%, were applied in the range of applications mentioned above.
  • This patent is to create a system to mitigate the effects of burners with confined natural gas flares, the most commonly used equipment in the industry in general, on the atmosphere (greenhouse effect and formation of tropospheric NOx), as well as increasing energy efficiency by increasing the heat transfer of the flame by thermal radiation.
  • the experimental system for the combustion of natural gas to control the correlations between thermal radiation formation of soot and NOx with the use of oxygen enriched combustion in a preferred embodiment consists of three parts: gas supply system, cylindrical combustion chamber with burner, and, instrumentation system.
  • the scheme of the system is shown in Figure 1 with the indication of its main components.
  • the feed system provides the gases (natural gas, air and oxygen), with flowmeters controlled by rotameters (2), for the development of the flame in a confined chamber (5). This flame is developed through a diffuse burning where the flows of the combustible gas and the oxidant are developed separately, most industrially widespread.
  • the feed system provides the gases (air + oxygen) for the process of enriching the oxidant in a premixer (8).
  • the instrumentation system was developed to monitor the formation of soot in the flame through a data acquisition system, laser and photodetectors (1) (4) (6).
  • the concentration of soot is determined from the attenuation of the laser beam (6) by the flame (5).
  • This attenuation is detected by the photodetectors (4) and transmitted to the data acquisition system (1) by voltage signals (3), in which the concentration values are determined.
  • the levels of thermal radiation and NOx emission in the chamber are checked with a radiometer and portable gas analyzer (7), respectively.
  • the process that occurs in the experimental system aims to: develop confined flames that use the OEC technique with low levels of enrichment (up to 30%) that promote flames with a higher luminosity, that is, with a higher concentration of soot, implementing the (0,6 to 3 microns), and, consequently, reducing the flame temperature and the emission of NOx, since the same in flames is directly associated with its temperature.
  • Evidence on these correlations has recently been presented in the state of the art.
  • FIGs 2, 3 and 4 present the experimental results found with the system.
  • the flame brightness aspect is presented with the use of OEC with low levels of enrichment.
  • a natural gas flame developed with atmospheric air as the oxidant has a blue coloration (A).
  • the flame of natural gas using an oxidant which is a mixture enriched with air and oxygen has a typical yellowish appearance of flame (Et) with a higher production of soot.
  • Figure 3 presents the implementation of thermal radiation in the specter of interest of soot with the use of OEC (contents of 23 and 25%).
  • the thermal radiation has a higher value than with burning with atmospheric air around 59%.
  • Figure 4 shows the results obtained in experiments for the NOx emission at the combustion chamber outlet. The results found that the use of OEC produces emissions similar to the use of air as an oxidant, which brings the correlation between soot formation, OEC, thermal radiation and NOx emission previously reported.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Regulation And Control Of Combustion (AREA)

Abstract

L'invention concerne un système de combustion de gaz naturel pour le contrôle des corrélations entre rayonnement thermique, formation de suies et de NOx lors de l'utilisation de la combustion enrichie à l'oxygène, en vue d'une mise à profit des corrélations entre l'utilisation de la combustion enrichie à l'oxygène (OEC) avec de faibles niveaux d'enrichissement, la formation de suies, le rayonnement thermique et les émissions de NOx (oxydes d'azote), ce qui permet d'améliorer le rendement énergétique de brûleurs et de réduire l'impact sur l'environnement. Le système comprend un système d'acquisition de données (1), un instrument de mesure d'échappement (2), un signal de tension (3), des instruments de détection de suies (4), une flamme dans la chambre de combustion (5), un faisceau laser (6), un système d'analyse de gaz (7) et un mélangeur d'air/O2 (8).
PCT/BR2011/000025 2010-01-21 2011-01-21 SYSTÈME DE COMBUSTION DE GAZ NATUREL POUR LE CONTRÔLE DES CORRÉLATIONS ENTRE RAYONNEMENT THERMIQUE, FORMATION DE SUIES ET DE NOx LORS DE L'UTILISATION DE LA COMBUSTION ENRICHIE À L'OXYGÈNE WO2011088538A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BRPI1003906-6A BRPI1003906A2 (pt) 2010-01-21 2010-01-21 sistema de combustço de gÁs natural para o controle das correlaÇÕes entre radiaÇço tÉrmica formaÇço da fuligem e nox com a utilizaÇço da combustço enriquecida com oxigÊnio
BR11100000072 2010-01-21

Publications (1)

Publication Number Publication Date
WO2011088538A1 true WO2011088538A1 (fr) 2011-07-28

Family

ID=44306325

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BR2011/000025 WO2011088538A1 (fr) 2010-01-21 2011-01-21 SYSTÈME DE COMBUSTION DE GAZ NATUREL POUR LE CONTRÔLE DES CORRÉLATIONS ENTRE RAYONNEMENT THERMIQUE, FORMATION DE SUIES ET DE NOx LORS DE L'UTILISATION DE LA COMBUSTION ENRICHIE À L'OXYGÈNE

Country Status (2)

Country Link
BR (1) BRPI1003906A2 (fr)
WO (1) WO2011088538A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4756684A (en) * 1986-04-09 1988-07-12 Hitachi, Ltd. Combustion monitor method for multi-burner boiler
EP0152804B1 (fr) * 1984-01-27 1989-09-27 Hitachi, Ltd. Système de chaudière
US5772421A (en) * 1995-05-26 1998-06-30 Canadian Gas Research Institute Low nox burner
EP0967440A2 (fr) * 1998-06-25 1999-12-29 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Système de surveillance et de commande pour la combustion de combustible liquide
ES2159825T3 (es) * 1996-04-17 2001-10-16 Orfeus Comb Engineering Gmbh Procedimiento y dispositivo para el control de un proceso de combustion en una caldera.
US6780378B2 (en) * 2001-06-28 2004-08-24 Gas Technology Institute Method for measuring concentrations of gases and vapors using controlled flames
WO2008042075A2 (fr) * 2006-10-03 2008-04-10 Fives North American Combustion, Inc. Combustion à faible émission de nox

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0152804B1 (fr) * 1984-01-27 1989-09-27 Hitachi, Ltd. Système de chaudière
US4756684A (en) * 1986-04-09 1988-07-12 Hitachi, Ltd. Combustion monitor method for multi-burner boiler
US5772421A (en) * 1995-05-26 1998-06-30 Canadian Gas Research Institute Low nox burner
ES2159825T3 (es) * 1996-04-17 2001-10-16 Orfeus Comb Engineering Gmbh Procedimiento y dispositivo para el control de un proceso de combustion en una caldera.
EP0967440A2 (fr) * 1998-06-25 1999-12-29 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Système de surveillance et de commande pour la combustion de combustible liquide
US6780378B2 (en) * 2001-06-28 2004-08-24 Gas Technology Institute Method for measuring concentrations of gases and vapors using controlled flames
WO2008042075A2 (fr) * 2006-10-03 2008-04-10 Fives North American Combustion, Inc. Combustion à faible émission de nox

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SANTOS, A. A. B. ET AL.: "DESENVOLVIMENTO DE MODELO PRELIMINAR DA INTERACAO ENTRE RADIACAO TERMICA, FULIGEM E OEC", CIBIM 8, 8TH CONGRESSO IBEROAMERICANO DE ENGENHARIA MECANICA, 23 October 2007 (2007-10-23) - 27 October 2007 (2007-10-27), Retrieved from the Internet <URL:http://conoreso.pucp.edu.pe/cibim8/pdf/06/06-40.pdf> *

Also Published As

Publication number Publication date
BRPI1003906A2 (pt) 2013-02-26

Similar Documents

Publication Publication Date Title
Khalil et al. Fuel property effects on distributed combustion
Mackrory et al. Measurement of nitrogen evolution in a staged oxy-combustion coal flame
Mashruk et al. Nitrogen oxides as a by-product of ammonia/hydrogen combustion regimes
Khalil et al. Thermal field investigation under distributed combustion conditions
Pacheco et al. Experimental and kinetic investigation of stoichiometric to rich NH3/H2/Air flames in a swirl and bluff-body stabilized burner
Hernández et al. Flame stability and OH and CH radical emissions from mixtures of natural gas with biomass gasification gas
Abdelaal et al. Characteristics and flame appearance of oxy-fuel combustion using flue gas recirculation
Mafra et al. Influence of swirl number and fuel equivalence ratio on NO emission in an experimental LPG-fired chamber
Nazeer et al. Detailed measurements in a pulverized coal flame with natural gas reburning
Zeng et al. Influences of initial coal concentration on ignition behaviors of low-NOx bias combustion technology
Li et al. Effect of the air temperature on combustion characteristics and NO x emissions from a 0.5 MW pulverized coal-fired furnace with deep air staging
Skvorčinskienė et al. Combustion of waste gas in a low-swirl burner under syngas and oxygen enrichment
Pawlak-Kruczek et al. Examinations of the process of hard coal and biomass blend combustion in OEA (oxygen enriched atmosphere)
Striūgas et al. Chemiluminescence-based characterization of tail biogas combustion stability under syngas and oxygen-enriched conditions
Sigfrid et al. Influence of reactive species on the lean blowout limit of an industrial DLE gas turbine burner
Pourhoseini et al. Tangential Flue Gas Recirculation (TFGR) technique for enhancement of radiation characteristics and reduction of NOx emission in natural gas burners
Park et al. Experimental study on flameless combustion and NO emission with hydrogen‐containing fuels
Ghabi et al. Effects of pulsed gliding arc plasma on non-premixed CH4/CO2–air flame stability
WO2011088538A1 (fr) SYSTÈME DE COMBUSTION DE GAZ NATUREL POUR LE CONTRÔLE DES CORRÉLATIONS ENTRE RAYONNEMENT THERMIQUE, FORMATION DE SUIES ET DE NOx LORS DE L&#39;UTILISATION DE LA COMBUSTION ENRICHIE À L&#39;OXYGÈNE
Zhang et al. Preheated combustion characteristics and fuel-nitrogen conversion paths for bituminous coal and anthracite in wide-range preheating temperature
Ghabi et al. Laminar burning velocity, adiabatic flame temperature, and pollutants of biogas/air mixture at various CO2 concentrations and plasma assist
Sadkin et al. Experimental study of the characteristics of heptane combustion in a high-speed steam jet
Jerzak Emissions of NOx and CO from natural gas combustion with adding CO2 at varying distances from the burner
Guo et al. Research status and development of low-nitrogen burner for low calorific value gas fuel
CHEN Effects of CO addition on the lean premixed CH4/air flame

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 11734275

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 11734275

Country of ref document: EP

Kind code of ref document: A1