4
Tab. no. 2a) Heating technical parameters of EKORET SAPHIR 15 boiler
HARD COAL
LIGNITE
PELLETS
Nominal output
kW
15
15
15
Fuel consumption
kg.h
-1
2,58
3,34
3,8
Fuel efficiency
MJ.kg
-1
25,16
19,17
16,78
Fuel consumption in the holding regime
kg.h
-1
0,13
0,10
0,70
Burning time at nominal output – small reservoir
h
67 h 40 min
52 h 30 min
41 h 50 min
Burning time at nominal output – large reservoir
h
132 h 49 min
103 h
82 h 7 min
Efficiency
%
Up to
83,2
Up to
84,3
Up to
84,7
Flue gas temperature
°C
160
160
160
Flue gas mass flow at nominal output
g.s
-1
15,97
18,00
18,01
Boiler class
3
3
3
Tab. no. 2b) Heating technical parameters of EKORET SAPHIR 25 boiler
HARD COAL
LIGNITE
PELLETS
Nominal output
kW
22
22
22
Fuel consumption
kg.h
-1
3,65
4,72
5,45
Fuel efficiency
MJ.kg
-1
25,16
19,17
16,78
Fuel consumption in the holding regime
kg.h
-1
0,13
0,10
0,70
Burning time at nominal output – small reservoir
h
45 h 50 min
35 h 30 min
25 h 10 min
Burning time at nominal output – large reservoir
h
90 h 10 min
69 h 40 min
49 h 24 min
Efficiency
%
Up to
86,4
Up to
87,7
Up to
86,6
Flue gas temperature
°C
190
160
180
Flue gas mass flow at nominal output
g.s
-1
16,04
17,64
16,18
Boiler class
3
3
3
! Important notice:
The above mentioned heating technical parameters vary according to the type, quality and moisture
of the fuel used. Therefore there may be necessary corrections at setting of feeding time (proportion
of fuel feeding and fuel afterburning time). For example, if there occur the sliver parts of fuel on the
fire grate and in the ash pan, it is evident, that the speed of feeding is higher than the speed of
afterburning, in this case it is necessary to decrease the feeding cycle.
Specified fuel parameters – fuel which was tested by SZÚ:
•
Granularity
5 - 25 mm
•
Recommended heating value
> 15 MJ. kg
-1
•
Ash content
max. 15 %
•
Water content
max. 12 % (hard coal, wood pellets),
max. 20 % (lignite)
•
Volatile combustible content
28 - 40 %
•
Ash deformation temperature by melting
> 1150 °C
•
Low agglutinating power
•
Low creeping
Values state in fig. no. 1 and Fig. no. 2 were measured out by using the specified fuel in tests.
Tab. no. 3 Specified fuel
Fuel
Sort of fuel
Granularity
[mm]
Fuel value
[MJ.kg
-1
]
Hard coal
Peas
10 – 18
21 – 28,5
Lignite
Nub 2
10 – 25
16,5 – 19,5
Nub 3
10 – 16
16,5 – 19,5
Biomass
Wood pellets
Ø 6 - 8
15 – 19
Tab. no. 4 Specified fuel – lignite (Automatic operation)
Fuel
Granularity
[mm]
Fuel
value
[MJ.kg
-1
]
Ash content
[%]
water
content
[%]
sulphur
content
[%]
Specific
sulphur
content
[g/MJ]
Tar
content in
dry matter
[%]
Tar content in
combustible
matter
[%]
Screened lignite from
Bílina mine
(coal cleaning plant) –
nub 2
10 - 25
17,6
9,8
(in
anhydrous
condition)
max. 20
0,77
0,44
15,1
15,71
Содержание EKORET SAPHIR 15
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