4
Tab.
№
. 3
Heat - technical parameters of the boiler at COKE and ANTHRACITE burning
granularity 30 – 60 mm
heating value: 26 - 30 MJ. kg-1
Section number
2
3
4
5
6
7
8
9
10
Rated power
kW
11,7
17,7
23,3
29,1
34,9
40,7
46,5
52,3
58,1
Efficiency
%
75 - 80
Orientation fuel consumption – coke
kg.h
-1
1,89
2,87
3,77
4,71
5,65
6,59
7,53
8,47
9,41
Heating value – coke
MJ. kg
-1
27,8
Orientation fuel consumption – anthracite
kg.h
-1
1,98
3,0
3,95
4,93
5,92
6,9
7,88
8,87
9,85
Heating value – anthracite
MJ. kg
-1
28,31
Product of consumption temperature
°C
max. 280
Energy efficiency class
D
D
C
C
C
B
B
B
B
Energy efficiency index
74
74
76
78
79
82
82
82
82
Season energy efficiency
%
75,3
77,2
79,0
80,8
82,1
84,7
85,0
84,9
85,1
Tab.
№
. 4
Heat technical parameters of the boiler at WOOD burning
humidity 15 - 25 %
heating value: 12 - 15 MJ. kg
-1
Section number
4
5
6
7
8
9
10
Rated power
kW
20
25
30
35
40
45
49
Efficiency
%
75
Orientation fuel consumption
kg.h
-1
6,4
8,0
9,59
11,19
12,79
14,39
15,67
Heating value
MJ. kg
-1
15,01
Product of consumption temperature
°C
max. 320
Energy efficiency class
B
B
A
A+
A
B
A
Energy efficiency index
89
92
95
98
94
89
92
Season energy efficiency
%
63,6
65,6
67,6
69,7
66,6
63,5
65,5
0
50
100
150
200
250
300
15
20
25
30
35
40
45
50
55
60
Fig.
№
. 1
Hydraulic loss of the boiler drum
3
Description
3.1
Construction of the boiler
The main part of the boiler is the cast iron section boiler drum made of grey cast iron according to
Č
SN 42 2415 or
Č
SN 42 2420. Pressure
parts of the boiler correspond to the demands on solidity according to CSN 07 0240 and CSN 07 0245.
The boiler drum consists of sections with the help of pressured boiler nipples and is secured with boiler screws. The sections create burning and
ash space, water space and a convective part. Heat water input and output are situated at the back part of the boiler.
The back section of the boiler has a smoky chimney – pot and a heat water flange in the upper part, and a returnable water flange with a socket
for impregnating and clearing plug. Stoker and ash door and a firebox door under them are fixed to the front section.
The whole boiler drum is isolated with a stifling, mineral isolation that reduces losses by sharing heat into the surroundings. The steel jacket is
fitted in colour with a quality comaxite paint.
At seven to ten – sectional size of the VIADRUS U 22 C boiler two tapes of medium sections are used: at the front part of the boiler the sections
are without a molding and in the back part with a molding. The molding closes the burning space and carries back the flame and product of
consumption from the back space to the front part of the boiler, i.e. by the back path in smoky draughts it is perfectly taken advantage of the
product of consumption heat.
Number of sections without and with a molding is mentioned in the following tab:
Tab.
№
. 5
Medium sections of the VIADRUS U 22 C boiler
Size of the boiler in sections
2
3
4
5
6
7
8
9
10
Medium section with a molding
-
1
2
3
4
4
5
5
6
Medium section without a molding
-
-
-
-
-
1
1
2
2
At the VIADRUS U 22 D boiler three types of medium sections are used: in the front part of the boiler (except the four – section size) there is a
section with a recess for easier fuel inserting to the average up to 220 mm, then sections without a molding, in the back part with a molding. The
molding closes the burning space and carries back the flame and product of consumption from the back space to the front part of the boiler, i.e.
by the back path in smoky draughts it is perfectly taken advantage of the product of consumption heat.
Tab.
№
. 6
Medium sections of the VIADRUS U 22 D boiler
Size of the boiler in sections
4
5
6
7
8
9
10
Medium section with a recess
-
1
1
1
1
1
1
Medium section with a molding
2
2
3
4
5
5
6
Medium section without a molding
-
-
-
-
-
1
1
Pa
Power in kW
