Furnaces – With exhaust gas treatment means – Afterburning means
Patent
1985-11-14
1988-01-05
Yuen, Henry C.
Furnaces
With exhaust gas treatment means
Afterburning means
110214, 110315, 110316, F23B 500, F23B 700
Patent
active
047168420
ABSTRACT:
A solid fuel burner 1 has a first chamber 2 for receiving a combustible fuel to be gasified and a substantially conical upwardly directed extraction zone connecting a bottom portion of the primary chamber 2 with a secondary chamber 8 through the apex region 42. The combustible fuel presents a relatively large surface area G into the extraction zone F and relatively low velocity gases can leave the primary combustion chamber 2 to maximize the extraction of gaseous fuel from the fuel while leaving fuel and other particulate material behind. The substantially conical shape of the extraction zone F which provides a convergent gas flow path does however enable a sufficiently high velocity or the hot gas entering into the secondary chamber 8. A transverse entry of cold air H by means of a tuyere assembly 46 is provided at the apex region 42. The high density of the cold air and its transverse flow ensures a good mixing of the cold air with the hot gas before its entry into the secondary chamber 8. The hot gas in the chamber 8 has a circular motion creating a vortex in the center of the chamber 8. Hot gas leaves the chamber 8 from one side at outlet 9 while cold air flows into the chamber 8 from an opposite side.
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