Dissertation > Excellent graduate degree dissertation topics show

Study on Fusion Characteristic and Mineral Change of Blends of Sludge and Coal

Author: GaoYingJia
Tutor: LiuLiang
School: Changsha University of Science and Technology
Course: Thermal Power Engineering
Keywords: sewage sludge ash fusion characteristics XRD thermoanalysis blends of sludge and coal
CLC: X703
Type: Master's thesis
Year: 2011
Downloads: 19
Quote: 0
Read: Download Dissertation

Abstract


Slagging properties and selection of slag dischange form of boiler are affected by ash Fusion characteristics. And it’s an important factor that affects the normal operation of boilers. Many domestic and foreign scholars who study on combustion of blends of sludge and coal mainly focus on combustion characteristics and pollutant emission characteristics of blends of sludge and coal. While the fusion characteristics of blends of sludge and coal is rarely studied.This thesis selects Lanba coal and sewage sludge ash, and make ash samples according to certain mixing proportion. The ash was analyzed by ash melting point testing, X-ray diffraction, TD-DSC, SEM/EDX means. And fusion characteristics were studied from minerals, microstructure perspective in order to provide relevant repference for the design of the sludge and coal mixed fuel boiler.The main contents of this thesis are as follows:1. Fusion characteristic of mixing fuel ash under different mixing proportion were studied by pyramid metod, and found as the sludge content rising in blends, fusion characteristics temperatures of ash reduce.2. Mixing fuel ash under different mixing proportion and different calcining temperature were studied by XRD. And the influence of minerals in ash to ash fusion characteristic is analysised from mineralogical perspective, and found the relatively high contents of hematite and calcium feldspar in sludge ash caused the characteristic temperatures low, the relatively low contents of mullite coal ash caused the characteristic temperatures high.3. Fusion characteristic of mixing fuel ash under different mixing proportion were studied by TG-DSC. The causes of formation of weightlessness peak on TG curves and characteristic peaks on DSC curves were analyzed. A little carbonate and sulphate were found in coal ash. Carbonate, sulphate, Ca(OH)2 were found in blends ash and sludge ash. And the contents rise as the content of sludge in blends rise.4. Microscopy and element of mixing fuel ash under different mixing proportion were studied by SEM and EDX. And the different morphological features of scanning photo were analyzed by EDX to reflect the element differences, found as the improvement of calcining temperature, but there is no obvious difference of the elements in each ash sample.

Related Dissertations

  1. PtRh / Pt 5 / C Catalyst Preparation, Characterization and Electrocatalytic Oxidation of Ethanol,TM911.4
  2. Preparation and Properties Research of Ba0.8 Sr0.2 Tio3 /CoFe2O4 Multi-iron Thin Films,O484.1
  3. Study on Solid State Reaction of Metal/SiGe and Its Contact Characteristics,TN304
  4. Preparation and Application of Zinc Stannate Coated Inorganic Nano-Particles as Flame Retardant,TB383.1
  5. Experimental Study on Coal Ash Fusion Characteristics under Gasification Condition,TQ533
  6. Studies on the Extraction Technology and Finger Print of Isoflavones in Belamcanda Chinenis (L.)DC,TQ461
  7. Experimental Study on Autoclaved Aerated Concrete by Using Yinan Gold Mine Tailings,TU528.041
  8. The Evolution Characteristic of the Char’s Pore Structure and Surface Functional Groups During the Reaction Process under O2/CO2 Atmosphere,TK16
  9. Effect of Tea Polyphenol on the Slow Digesting Properties of Starch and the Mechanism,R151
  10. Study on Phosphorus Recovery from the Wastewater Containing Phosphorus Using Struvite Precipitation Proeess,X703
  11. Study on Microstructures and Properties of Medium Chromium Alloy Cast Steel Roller,TG142.1
  12. The Evolution Characteristic of the Char’s Pore Structure and Surface Functional Groups During the Reaction Process Under O2/CO2 Atmosphere,TK16
  13. Low expansion material Ca_ (1-x) Sr_xZr_4P_6O_ (24) Preparation and Properties of,O482.2
  14. Experimental Study on the Sulfate Corrosion-Resistance Admixture for Concrete,TU528.042
  15. The Influence of Incipient Brown Rot on the Properties of Chinese Fir at Macroscopic and Tissue Level,S782.33
  16. Microstructure and Magnetic and Optical Properties of Mn2+-doped MgxZn1-xO Powders,O482
  17. The argillaceous slate cross concept of isotropic deformation of elastoplastic coupling strength criterion test,TD31
  18. Formation, Treatment and Microstructure Analysis of (Fe1-xCox)86Hf7B6Cu1 Amorphous Alloys,TG139.8
  19. Preparation and Properties of Pb(Zr0.96Ti0.03)Nb0.01O3/La0.5Sr0.5CoO3 Heterojunction,O484.1
  20. Thermal Decomposition Kinetics of Captrril Intercalated Mg-Al Layered Double Hydroxides and Interactions between Bovine Serum Albumin and Mg-Al Layered Double Oxides,R962

CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
© 2012 www.DissertationTopic.Net  Mobile