Furnaces – Including means to feed solid fuel – Supply hopper; e.g. – magazine – etc.
Reexamination Certificate
2005-08-16
2005-08-16
Rinehart, Kenneth (Department: 3749)
Furnaces
Including means to feed solid fuel
Supply hopper; e.g., magazine, etc.
C110S1010CD, C110S108000, C110S267000, C110S186000
Reexamination Certificate
active
06928936
ABSTRACT:
The present invention provides a device for feeding pulverized coal to a furnace, such as a drop tube furnace. The feeding system consists of a feed hopper, a pneumatic vibrator positioned on the periphery of the feeder hopper, a needle valve arrangement in the said feed hopper, a depth gauge micrometer, a distribution chamber with primary and secondary airline at the bottom of the said feed hopper. Adjusting the pressure of compressed air allows setting of the frequency of vibration of the pneumatic vibrator. The needle valve arrangement in conjunction with the vibratory hopper controls the feed rate. The rate of coal flow is measured by the depth gauge micrometer. The distribution chamber with primary and secondary airline at the bottom of the said feed hopper allows uniform mixing of air with coal before being charged into the furnace reactor.
REFERENCES:
patent: 718985 (1903-01-01), Davis
patent: 4092094 (1978-05-01), Lingl, Jr.
patent: 4744311 (1988-05-01), Piekos
patent: 5485812 (1996-01-01), Firey
patent: 5997234 (1999-12-01), Norris
patent: 281098 (1927-11-01), None
patent: 335163 (1930-09-01), None
Biswas Subhasis
Choudhury Ashim
Choudhury Nandita
Kumar Manish
Mukherjee Ashis
Council of Scientific and Industrial Research
Ladas & Parry
Rinehart Kenneth
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