Steam generator having a circulating fluidized bed and a dense pack heat exchanger for cooling the recirculated solid materials
The invention comprises a dense pack heat exchanger for a steam generator having a circulating fluidized bed combustion system whereby a bed of solid particles comprising fuel and inert material is entrained in the furnace gas stream. Means are provided for collecting high temperature bed solid particles downstream of the furnace. The dense pack heat exchanger directs the hot collected particles down over heat transfer surface, such surface being a portion of the steam generator fluid circuits. Flow is induced by gravity means. The dense compaction of the solid particles around the fluid heat exchange circuits results in high heat transfer rates as the fluid cools the compacted solid material. The heat exchange surface is arranged to facilitate flow of the solid particles through the heat exchanger.
- Assignee:
- Electrodyne Research Co.
- Patent Number(s):
- US 4454838
- OSTI ID:
- 6452551
- Country of Publication:
- United States
- Language:
- English
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