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. 80 (2001), No. 4

  • Development of the Dynamic Simulator for the Pressure Drop across CTF

    pp. 264-273

    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.80.264

    The full scale ceramic tube filter (CTF) for hot gas cleaning installed in the 71MWe PFBC combined cycle power plant was successfully demonstrated to establish extremely low emission and stable pressure drop.The pressure drop across both the filter element and the ash accumulated on its surface was analyzed and predicted based on the actual PFBC plant operation data. The equivalent electric circuit model for the flue gas system of the actual PFBC including CTF was built in the simulation program where the characteristic equations were set up to describe the pressure drop across filters. Then the dynamic simulator was constructed and tuned in order to follow the actual plant behaviors.
    The reverse cleaning is a very important control factor for the stable operation of CTF. There are four parameters to determine the reverse cleaning conditions: fast pulse cleaning valve open time, pulse cleaning pressure, pulse cleaning interval and pulse cleaning mode. The former two parameters were fixed, while the latter two were controllable.
    The optimum condition to satisfy both the lowest maximum pressure drop across CTF and the smallest range of pressure drop variation was explored using the developed simulator. In our case, the three compartments for each CTF vessel were equipped. Then the mode of uniform cleaning against the compartments was suggested as the optimum cleaning one. Such an optimization can be performed exclusively by the simulator, because of too much complexity due to the interaction among the compartments in the actual plant operation.
    The possible improvement for the characteristic equations and its corresponding equivalent circuit model were discussed, to allow its application for the commercial plant design.
  • Supercritical Methanol Extraction of Loy Yang Coal

    pp. 274-277

    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.80.274

    A preliminary study on supercritical methanol extraction of a brown coal, Loy Yang, was conducted. The experiments were done at 400°C with varying the extraction time or the coal/solvent ratio. When the extraction time was extended from 60min to 300min, the extraction yield remained constant but the liquid yield was reduced from 70% to 60%. This suggested that the extract further decomposed into gaseous components during the extended extraction. The increase in the coal/solvent ratio led to the decreases in the extraction and liquid yields, and the decrease in the liquid yield was more remarkable than that in the extraction yield . The pressure in the autoclave increased with the increasing coal/solvent ratio. These observations indicated that the increase in the coal/solvent ratio led to pyrolysis of coal as a dominant chemical process rather than the degrading reaction of coal polymer by the action of supercritical methanol as a reagent. A GC-MS study on a liquid extract revealed that the major chemicals were methyl-substituted phenols and a phenol-methyl ether.

Article Access Ranking

26 Mar. (Last 30 Days)

  1. Dependence of Carbon Concentration and Alloying Elements on the Stability of Iron Carbides ISIJ International Advance Publication
  2. Comprehensive Optimization Control Technology of Rolling Energy and Oil Consumption in Double Cold Rolling ISIJ International Advance Publication
  3. Experiments on Removal of Hydrophilic Fine Particles in Bubbly Flow ISIJ International Vol.59(2019), No.2
  4. Effects of Impurities and Processing Conditions in Al–1%Mn Alloys on the Formation of Thermally Stabilized Substructures MATERIALS TRANSACTIONS Vol.59(2018), No.11
  5. Temperature Field Distribution of a Dissected Blast Furnace ISIJ International Advance Publication
  6. Coating Film Profiles Generated by Fluctuating Location of the Wiping Pressure and Shear Stress ISIJ International Vol.59(2019), No.2
  7. Effect of EAF Slag Temperature and Composition on its Electrical Conductivity ISIJ International Vol.59(2019), No.2
  8. Fundamentals of Silico-Ferrite of Calcium and Aluminium (SFCA) Iron Ore Sinter Bonding Phase Formation: Effects of Basicity and Magnesium on Crystallisation during Cooling ISIJ International Vol.59(2019), No.2
  9. Evolution of Blast Furnace Process toward Reductant Flexibility and Carbon Dioxide Mitigation in Steel Works ISIJ International Vol.56(2016), No.10
  10. Numerical Simulation of Multiphase Flow and Mixing Behavior in an Industrial Single Snorkel Refining Furnace (SSRF): The Effect of Gas Injection Position and Snorkel Diameter ISIJ International Advance Publication

Search Phrase Ranking

26 Mar. (Last 30 Days)

  1. blast furnace
  2. blast furnace productivity
  3. blast furnace permeability
  4. galvanizing
  5. tuyere abrasion
  6. tuyere erosion
  7. tuyere failure
  8. lme
  9. wear on tuyere
  10. 鉄と鋼