Journal of the Japan Institute of Energy
New Arrival Alert : OFF

You can use this feature after you logged into the site.
Please click the button below.

Log in / Sign up
ONLINE ISSN: 1882-6121
PRINT ISSN: 0916-8753

Journal of the Japan Institute of Energy Vol. 79 (2000), No. 1

  • Emission of SO2 and Desulfurization Mechanism in 71MWe PFBC Demonstration Plant

    pp. 57-68

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3775/jie.79.57

    Desulfurization extent in the 71MWe PFBC demonstration plant was analyzed in terms of operational parameters and morphology of the desulfurizing bed material. High removal level of SO2 achieved in PFBC in spite of high CO2 partial pressure was correlated not with the temperature of the bed but with the temperature of the exhaust gas (Tg), suggesting that the emission of SO2 is governed by the decomposition of CaSO4 flying out from the boiler. The residence time in the fluidized bed did not influence the level of SO2 emission, indicating the saturation of desulfurization reaction in the bed within rather short time . The sorbent particles in the bed had CaSO4 layer of 30-40μm thickness on the surface . Since the calcium minerals produced are porous in the core as well as in the skin, such observation suggests the formation of CaO at the bottom of the furnace where the CO2 partial pressure was sufficiently low for the decomposition of CaCO3. The skin of material was eroded to expose the active surface for further desulfurization. Such CaO of sufficient amount in the bed adsorbs SO2 very rapidly to complete the desulfurization in the bed . Hense the concentration of SO2 in the flue gas is determined by the reaction CaSO4+CO→CaCO3+SO2 in the freeboard. This reaction appears in equilibrium since a fair linear correlation was observed between ln (PSO2/PCO) and 1/Tg.
    x

    Readers Who Read This Article Also Read

    1. Effective Viscosity and Thermal Conductivity of Slurry in a Preheater of the 150ton/day NEDOL Coal Liquefaction Pilot Plant Journal of the Japan Institute of Energy Vol.79(2000), No.1
    2. A study on the Economic Evaluation Method of Coal Resources (I) Journal of the Japan Institute of Energy Vol.79(2000), No.2
    3. Saturated Densities of Carbon Dioxide+Water Mixture at 304.1K and Pressures to 10 MPa Journal of the Japan Institute of Energy Vol.79(2000), No.2
  • Effective Viscosity and Thermal Conductivity of Slurry in a Preheater of the 150ton/day NEDOL Coal Liquefaction Pilot Plant

    pp. 69-83

    Bookmark

    You can use this feature after you logged into the site.
    Please click the button below.

    Log in / Sign Up

    DOI:10.3775/jie.79.69

    In order to investigate the influence of coal property and its slurry concentration on the operability of the preheater at the 150ton/day NEDOL coal liquefaction pilot plant, the pressure drop as well as the temperatures of tube skin and coal slurry was measured along the length of a hairpin-shaped tube (72mmφI.D.×94mmφO.D., 440m in length) of the slurry preheater. Different concentration of coal slurry was prepared for three kinds of coal by using their recycle oil. The measurement of pressure drop and temperatures were conducted under the conditions of coal slurry concentration of 40-50wt% and the gas/slurry feed ratio of 0.27-0.35Nm3-gas/kg-slurry.
    The results showed that the increase in the pressure drop was observed for Ikeshima bituminous coal, probably due to the swelling of coal particle, whereas little increase was for Tanito Harum subbituminous coal and Adaro brown coal. By simplifying the flow in the tube as a two-phase flow of gas and slurry, the effective viscosity and thermal conductivity of the slurry in the preheater were analyzed.
    x

    Readers Who Read This Article Also Read

    1. Emission of SO2 and Desulfurization Mechanism in 71MWe PFBC Demonstration Plant Journal of the Japan Institute of Energy Vol.79(2000), No.1
    2. A study on the Economic Evaluation Method of Coal Resources (I) Journal of the Japan Institute of Energy Vol.79(2000), No.2
    3. Saturated Densities of Carbon Dioxide+Water Mixture at 304.1K and Pressures to 10 MPa Journal of the Japan Institute of Energy Vol.79(2000), No.2

Article Access Ranking

07 Dec. (Last 30 Days)

  1. Heat conduction through different slag layers in mold. Thermal conductivity measurement of commercial mold fluxes ISIJ International Advance Publication
  2. Deformation of Non-metallic Inclusions in Steel during Rolling Process: A Review ISIJ International Vol.62(2022), No.11
  3. Activity of Chromium Oxide in Calcium Silicate Bearing Molten Slag for Highly Clean Chromium Steel Refining Process ISIJ International Advance Publication
  4. Effects of basicity and Al2O3 content on the crystal structure of silico-ferrite of calcium and aluminum ISIJ International Advance Publication
  5. Behavior and kinetic mechanism analysis of dissolution of iron ore particles in HIsmelt process based on high-temperature confocal microscopy ISIJ International Advance Publication
  6. Corrections of the figure in the paper “Effect of Cerium and Magnesium Addition on Evolution and Particle Size of Inclusions in Al-killed Molten Steel” [ISIJ International, Vol. 62 (2022), No. 9, pp. 1852-1861] ISIJ International Vol.62(2022), No.11
  7. Precipitation Behavior of Magnetite Phase during Modified Nickel Slag Treated by Molten Oxidation ISIJ International Advance Publication
  8. A shallow neural network for recognition of strip steel surface defects based on attention mechanism ISIJ International Advance Publication
  9. Characterization and Control of Secondary Phase Precipitation of Nb–V–Ti Microalloyed Steel during Continuous Casting Process ISIJ International Vol.62(2022), No.11
  10. Improvement of Sinter Productivity and Qualities by Placing Low Slag Green Pellet at Lower Layer of Sinter Packed Bed ISIJ International Vol.62(2022), No.11

Search Phrase Ranking

07 Dec. (Last 30 Days)

  1. blast furnace
  2. converter slag
  3. si-killed spring steel
  4. 高温変形抵抗
  5. 5%nickel
  6. 钢渣脱磷
  7. coatings hot formed steel
  8. free lime
  9. secondary cooling billet
  10. steel