Dissertation > Excellent graduate degree dissertation topics show

The Key Issue Study of Reduction of NOx Emissions in Furnace Air Stageing Combustion

Author: LuJie
Tutor: FanWeiDong
School: Shanghai Jiaotong University
Course: Thermal Power Engineering
Keywords: air staging combustion NO_x emission fineness particle size
CLC: TK227
Type: Master's thesis
Year: 2008
Downloads: 67
Quote: 0
Read: Download Dissertation

Abstract


Too many utility boilers NOx emissions seriously exceed the emission control regulations established by our country. According to the situation of our country, among all the measures used to control the NOx emissions of coal-fired boilers, the combustion modification measures, especially low NOx burner and furnace air staging measures are the lowest economic and operating costs. Deep furnace air staging could achieve NOx reduction about 60-70% from utility boilers when firing bituminous coals, which could satisfy regulation. Though effective, when the deep air staging measures are used for some coal, the unburned carbon in fly ash and reduction corrosion increase. In order to eliminate the negative impact, the ultimate way is coal fineness and char reduction NOx. In this article, the experimental study is carried out to investigate the combustion influencing factors on the ShenHua bituminous and Yangquan anthracite coals’NOx emissions and burnout in air staging.The coal combustion characters are investigated with one dimensional multipath air inlet furnce. Research the particle size, fineness of pulverized coal, primary air ratio, staged port location (reduction zone and burnout zone residence time referred) and flow rate of SOFA impact on NOx emissions. Different fineness of pulverized coal experimental data could be applied to utility boiler. Research unburning carbon in flying ash in deep air staging, and make it possible to identify the advantage of staging combustion by the oxygen concentration in flue gas.The NO reduction on the char surface was investigated with one dimensional drop furnace. Research the oxygen concentration in reduction zone to enhance the react of NO on the surface of char, found it’s beneficial for burnout at the same time. Research the oxygen, carbon dioxide and particle size effect on the NO reduction.According to the fineness experimental and combustion modification test data, set one power plant boiler as an example, investigate the fineness of pulverized coal influence on electicity consume of mill, loss of ignition, and the NOx tax and cost, analysis the economic of different fineness to find the lowest cost one in various air staged combustion, found the new way to identify the economic of pulverized coal fineness.

Related Dissertations

  1. Recovery Whey Soy Protein by Microfiltration and Development of Whey Powder,TQ936.2
  2. Study on Bacterial and Fungi Community Diversity of Different Particle Size in Paddy Soils under Long-Term Fertilization Treatments in the Tai Lake Region, China,S154.3
  3. Research of Preparation Technology of High Performance and Low Cost Aluminum Composite Materials,TB331
  4. Air flow meter test with WIRA fiber fineness of ramie,TS127
  5. Study on the Heavy Metals Distribution Characteristics in MSW Fly Ashes,X502
  6. Research on Slenderizing Jute Technical Fiber by Stretching,TS102.22
  7. Experimental Research on the Characteristics of Brown Coal Pyrolysis and Gasification,TQ541
  8. Study of Medium Temperature Sintering of X9R BaTiO3-based Ceramics,TQ174.1
  9. Analysis of Dust Movement in the Ray-Tube Discharge System,X701.2
  10. Study on Classification Capability of Mini-cyclones for Super-fine Powders,TQ051.8
  11. Effects of Different Electrical Solutions on Strength and Permeability of Saturated Porous,O611.3
  12. Study for the Influence of Additive and Processing Technique on the Densification of Zirconia Ceramics,TQ174.1
  13. Cobalt metal powder was prepared from cobalt tetroxide new technology,TQ138.12
  14. Studies on Stability and Viscosity of Polymer/Polyether Polyols Suspension,TQ317
  15. The Improvement of Expandable Polystyrene Producted by Suspension Polymerisition,TQ325.2
  16. Synthesis of Fluorinated Polyacrylate Copolymer Emulsion with Different Particle Size and Characterization of Surface Hydrophobic Properties,TQ316.334
  17. Photopolymerization in Supercritical Carbon Dioxide,TQ316.3
  18. Study on Thermal Polymerization and Photopolymerization to Prepare Microspheres by Stabilizer-Free Dispersion Polymerization,TQ316.3
  19. IPDI waterborne polyurethane solid content enhancement and surface energy lower,TQ320
  20. Study on Particles Motion Characteristic in Electrostatic Precipitator,X701.2

CLC: > Industrial Technology > Energy and Power Engineering > Steam Power Engineering > Steam boiler > Run
© 2012 www.DissertationTopic.Net  Mobile