Exhaust gas recirculation apparatus

Details Exhaust gas recirculation apparatus Exhaust gas recirculation apparatus

1979-02-28

1981-07-14

Ostrager, Allen M.

Power plants

Motor operated by expansion and/or contraction of a unit of...

Unit of mass is a gas which is heated or cooled in one of a...

431116, F02G 104, F23C 902

Patent

active

042779421

ABSTRACT:
Apparatus for recirculating combustion exhaust gases to the burner region of a Stirling cycle hot-gas engine to lower combustion temperature and reduct NO.sub.x formation includes a first wall separating the exhaust gas stream from the inlet air stream, a second wall separating the exhaust gas stream from the burner region, and low flow resistance ejectors formed in the first and second walls for admitting the inlet air to the burner region and for entraining and mixing with the inlet air portion of the exhaust gas stream. In a preferred embodiment the ejectors are arranged around the periphery of a cylindrical burner region and oriented to admit the air/exhaust gas mixture tangentially to promote mixing. In another preferred embodiment a single annular ejector surrounds and feeds the air/exhaust gas mixture to a cylindrical burner region. The annular ejector includes an annular plate with radially-directed flow passages to provide an even distribution of the air/exhaust gas mixture to the burner region.

REFERENCES:
patent: 3754393 (1973-08-01), Handa
patent: 3851467 (1974-12-01), Sherman et al.
patent: 3918262 (1975-11-01), Postma
patent: 3935708 (1976-02-01), Harrewijne et al.
patent: 3969892 (1976-07-01), Stettler et al.

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