Coal combustion system

Details Coal combustion system Coal combustion system

1986-05-02

1987-09-01

Favors, Edward G.

Furnaces

Utilizing powdered fuel

Having rotary flow means

110347, 431185, F23D 102

Patent

active

046900748

ABSTRACT:
A coal combustion control system is provided with independent means for supplying primary air and secondary air to a burner pipe assembly having a longitudinal central conduit through which pulverized coal suspended in primary air passes. Surrounding the central section is a first annular conduit through which secondary air is supplied, the secondary air passing through a spinner section near the outlet end of the annulus which imparts turbulence to the secondary air flow. In a preferred embodiment, a second annular conduit conveys a portion of the secondary air without spinners and turbulence. The relative quantities of air passing through the first annular, spinning or turbulent, zone and the second annular, straight or non-turbulent, zone can be regulated to obtain the desired flame characteristics and flame length appropriate for a given use of the coal burning system.

REFERENCES:
patent: 4270895 (1981-06-01), Vatsky
patent: 4457695 (1984-07-01), Kummel
patent: 4523530 (1985-06-01), Kaminaka et al.

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