Share

Development of gas-solid direct contact heat exchanger by use of axial flow cyclone.

Author(s) : SHIMIZU A., YOKOMINE T., NAGAFUCHI T.

Type of article: Article

Summary

A heat exchanger between particulate or granular materials and gas is developed. It makes use of a swirling gas flow similar to the usual cyclone separators but the difference from them is that the swirl making gas is issued into the cyclone chamber with downward axial velocity component. After it turns the flow direction near the bottom of the chamber, the low temperature gas receives heat from high temperature particles supplied from above at the centre of the chamber. Through this configuration, a direct contact and quasi counter-flow heat exchange pattern is realized so that the effective recovery of heat carried by particles is achieved. A model heat exchanger was manufactured via several numerical experiments and its heat exchange performances as well as particle recovery were examined. Attaching a small particle diffuser below the particle-feeding nozzle brought about a drastic improvement in the heat exchange performance without deteriorating the particle recovery efficiency. The outlet gas temperature was much higher than the particle outlet temperature finally obtained, which is never realized in a parallel flow heat exchanger.

Details

  • Original title: Development of gas-solid direct contact heat exchanger by use of axial flow cyclone.
  • Record ID : 2005-0617
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 47 - n. 21
  • Publication date: 2004/10

Links


See other articles in this issue (4)
See the source

Indexing