Continuous Calcination of Scallop Shell with a Fluidized Bed

DOI 2 Citations 9 References

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Other Title
  • ホタテ貝殻の流動層による連続焼成

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Abstract

Although scallops are one of the major products of the fishery industry around Hokkaido island, the treatment of waste scallop shells has been becoming an important subject from the environmental point of view because of a limitation of the space for reclamation and the bad smell they emit. Utilization of the shells in industries as a calcium source is the most desirable means for solving the above problems.<BR>In the present paper, calcination of scallop shell to produce quick lime was examined using an experimental fluidized bed reactor having a 0.16m inner diameter. Sieving the crushed shell to a maximum size of 3 mm brought about a smooth fluidization state and steady operation of the calciner. For the products withdrawn from the bottom of the fluidized bed calciner, a high calcination ratio has attained as high as over 99% at a calcination temperature of 850°C and a mean residence time in the calciner of 80 minutes. Reactivity and performance of sulfur dioxide absorption of the quick lime from the shell were measured and the results were compared with those values for quick lime from limestone. Excellent performance of sulfur dioxide adsorption was found for the quick lime from the shell, and this is obviously caused by a bigger mean size of the pores formed by calcination.

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Details 詳細情報について

  • CRID
    1390282680273653120
  • NII Article ID
    10002472391
  • NII Book ID
    AN10414685
  • DOI
    10.3985/jswme.7.142
  • ISSN
    1883163X
    18831648
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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