Liquid heaters and vaporizers – Plants – Feed water heaters
Reexamination Certificate
2000-09-07
2001-07-03
Lu, Jiping (Department: 3749)
Liquid heaters and vaporizers
Plants
Feed water heaters
C122S00700A, C122SDIG002, C110S216000
Reexamination Certificate
active
06253714
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention concerns a steam generator with a stack of coal-dust burners.
A steam generator of this genus is known from VGB Kraftswerktechnik 73 (1993) 917-32 for example. The outlet section of its combustion-air heater communicates with a filter-intake hood through a horizontal distributor. The air heater is on the same level as the coal-dust burner which is accommodated in a boxing attitude on two facing walls of the combustion chamber. Oil-injection lances are employed in the burner to ignite the coal dust. The lances can be removed when necessary, and space is accordingly provided for that purpose on the same level as the burner and between the wall of the combustion chamber and the air heater. The accommodation of the heater on the same level as the burner and the horizontal orientation of the distributors consume a lot of space, however, and result in considerable complexity.
SUMMARY OF THE INVENTION
The object of the present invention is a steam generator of the aforesaid genus that will be simpler but entail no sacrifice in quality.
The vertical orientation of the distributor and the new position of the air heater above the burner reduces the amount of space required by the steam generator in two ways. First, space is no longer needed between the intake hood of the electric filter and the rear wall to accommodate the air heater. Second, the heater can now be located near the combustion chamber. The extension or scaffolding that accommodates the heater need not be as tall, and less steel will be used.
REFERENCES:
patent: 5207164 (1993-05-01), Breen et al.
patent: 5320052 (1994-06-01), Spokoyny et al.
patent: 1280264A (1986-12-01), None
BBP Energy GmbH
Fogiel Max
Lu Jiping
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