Ikelic - Alliance Digital Repository

COAL
-
NOx
production: lower than 75 grams
per gigajoule of coal (permit values)
Dust emissions: negligible
The maximum emission levels are as follows:
j
- NOx:
- Dust:
SO : 0.22 g/kWh (0.062 Ib/MMBTU)
0.62 g/kWh (0.17 Ib/MMBTU)
0.007 g/kWh (0.002 Ib/MMBTU)
NO control is mainly achieved by suppressing
the flame temperature in the gas-turbine combus
tor. For this purpose the coal gas is diluted with
nitrogen and saturated with water vapor prior to
combustion.
cod
MW"*"
585
feed water
LP steam
QXyQCMTI
I
gasffcaDon
Qas treating
1
FIGURE 1
Integration Concept
The Integration concept (Figure 1) Is charac
terized by two main elements: gas side integra
tion and steam side integration.
BUGGENUM INTEGRATED CONCEPT
nRiogen
Jr
COS Q83
40 MW.
separation
own electricity consumption : 31 MWe
various heat losses : 80 MW
SOURCE: da W1KTERAWILLEBQER
i
Hp steam 64 MW
saturation
dilution
T
79kg/s
o o
i 1 ! feed i >
The gas turbine, the air separation plant and the
coal gasification unit are interconnected. The
gas turbine supplies part of its compressed air to
the air separation plant, which in turn supplies
oxygen to the coal gasification unit, and nitrogen
for coal pressurization and dilution of the coal
gas. The amount of air required for air separa
tion will, as such, not be in balance with the op
timum (diluted) coal gas flow to the gas turbine.
The mass flow through the expansion part of the
diluted
coal gas
501 MW
gasturbins
Ir atecstridy
495 kg/9 284 MWe
stack
50 MW
A
, ieeu water
LP steam
32 MW
ooodng water
171 MW
THE SYNTHETIC FUELS REPORT, JANUARY 1995