4"12-Z 1 - part - usaid

INTRODUCTION
ENERGO SYSTEM:
LOCATION:
INSTALLED CAPACITY:
COMMISSIONED:
FUEL:
LVIVENERGO
60 KM SOUTH OF LVIV
2400 MW (12 X 200 MW)
1965-1969
GENERAL DESCRIPTION OF THE PLANT
ANTHRACITE, GAS AND MAZUT
Unit 12 is now under reconstruction including turbine repair, new HP and LP cylinders, and
a new 99% efficient Russian electrostatic precipitator. The next precipitators for Unit 11 and
Unit 7 reconstruction in 1995 will be Ukrainian manufacturer. The Unit 12 boiler has all
critical pressure parts and membranes replaced and the steam drum checked, with an
expected 20-25 year life extension. This will restore and upgrade the rating of Unit 12 to
225 MW, and will be finished in April 1995.
COAL FEED SYSTEM
The Burshtyn power station has more than thirty (30) suppliers of anthracite coal located in
the Ukraine, Donbas, Poland, Lublin, Russia, Kubits, and Kazakstan, so there is
considerable variation in fuel characteristics. Generally, the coal has a high volatiles content
of about 30%, an ash content of 24-55%, a moisture content of 7-20%, a sulfur content of
1.5-3.7%, and a heating value of 2500-5000 kca1Ikg. Because of the importance of this plant
for power export, there are two main coal conveyors from reclaim, one to each end of boiler
house.
Each of the twelve boilers has two raw coal bunkers which are fed from the tripper belts.
Coal from each of the two bunkers is fed on a constant speed conveyor (except Unit 5 which
is variable speed) to the ball mills, and the height of a gate on each conveyor can be varied
to produce a given volumetric feed rate. Flue gas is fed to the ball mills to dry the coal.
Pulverized coal from each ball mill is transferred to a cyclone separator and then from a
pulverized coal bunker through motor driven rotary vane feeders to each of the sixteen (16)
burners on a boiler. The speed of these rotary vane feeders can be varied to produce
different coal feed rates.
5906-021PAR.5/1219194 4