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Coke/coal boilers

KZ-2

 

Low-temperature, water boiler meant for central heating network and for production of hot tap water with temperature of heating agent not exceeding 100°C. KZ-2 is a sectional boiler with upper combustion. KZ-2 boiler can operate in open systems with gravity or forced water circulation, with maximum pressure of 0,4 MPa. The size of the boiler is defined by the number of cast iron sections, from 4 to 8. The outer insulation of the boiler body consist of pre-enameled steel jacket. A thick layer of mineral wool is attached to the inside and this creates excellent insulation which reduces heat dispersion.
The main fuel is domestic coke, nut size class II. The boilers thermal efficiency is 80% (for coke). It is also possible to fire the boiler with coke mixed with coal of grade I or II (proportion 1:1) or with wood.

 

 

Technical data are listed below in the table:

Number of sections
Power rating
Lenght
Total weight
Average fuel consumption
Water capacity
Chimney draught
[kW]
[kg/h]
[pcs] Coke Coke+
coal
Woodd [mm] [kg] Coke Coke+
coal
Wood [dcm3] [Pa]
4 9,5 9,8 8,1 467 212 1,81 1,83 3,27 33 14
5 12,5 12,9 10,7 567 248 2,2 2,21 4 38,5 17
6 15,5 16 13,2 667 283 2,6 2,7 4,73 44 20
7 18,5 19,1 15,8 767 324 3,1 3,2 5,46 49 23
8 20,6 21,5 16,8 867 356 3,66 3,69 6,99 54,5 26

KZ-3kp

Low-temperature, water boiler meant for central heating network and for production of hot tap water in coke or coke-oil version. KZ-3Kp is a sectional boiler with upper combustion. Maximum temperature of heating agent cannot exceed 100°C (90°C for oil boilers).

Intermediate sections reflect the shape of combustion chamber and convection channels.

KZ-3Kp boiler in coke version can be equipped with thermostat (draught regulator), the objective of which is to regulate air access into combustion chamber.

KZ-3Kp boilers can operate in open systems installations with maximum pressures not exceeding 0,4 MPa and with gravity or pump water circulation.

KZ KZ-3Kp can be equipped with room thermostat or multifunctional electronic programmer.

Fuel:

The main fuel (for coke version) is domestic coke, nut size class II. It is also possible to fire the boiler with coke mixed with coal of grade I or II (proportion 1:1).
Thermal efficiency of the boiler: 80% (coke).

KZ-3Kp boiler in coke-oil version is equipped with blast oil burner and control panel. Blast oil burner is adapted for light fuel oil combustion, with viscosities not exceeding 1,5 E (6cSt). Control panel allows for obtaining required outlet temperature and protect against exceeding a critical temperature limit.
Boilers thermal efficiency: 90%.

 

Technical data are listed below in the table:

Number of sections [pcs]
Power rating [kW]
Total lenght (mm)
Total weight [kg]
Chimney draught (Pa)
Fuel consumption [kg]
Water capacity (dcm3)
Coke
Oil
Coke
Oil
Coke
Oil
5 24,0 28,0 480 320 20 23 2,65 3,7 46
6 28,0 33,0 570 360 26 3,13 4,3 53
7 33,0 38,0 660 400 28 3,60 5,1 59
8 37,0 43,0 750 440 29 4,07 5,7 66
9 41,0 48,0 840 480 30 4,54 6,3 73
10 46,0 53,0 930 520 31 5,01 7,2 79

KZ-5

KZ-5 (in water or steam version) is a cast iron sectional boiler, suitable for steam production in central heating installations as well as production of hot tap water. KZ-5 in steam version can also operate in technical installations powered by low-pressure steam (water should be properly prepared to prevent limescaling effect). The main fuel is domestic/industrial coke with minimum grain diameter of 20 mm. It is also possible to fire the boiler with foundry coke. Thermal efficiency of a boiler is 80%. The conditions for obtaining the above efficiency value are: proper installation and sealing of a boiler, using a fuel with calorific value about 25 MJ/kg (~ 6000 kcal/kg) and chimney draught of 39 Pa (~ 4 mm H2O).

Dimensions of boilers depend on number of sections

KZ-5 are produced as low-temperature water boilers and low-pressured steam boilers, with lower combustion.

KZ-5 water boiler can operate with maximum pressure of 0,5 MPa (~ 5 atm.) and water temperature of 100°C.

KZ-5 steam boiler can operate in technical installations with pressures not exceeding 0,07 MPa (~0,7 atm.).

KZ-5 are adapted for natural draught.

It is recommended to connect boilers with separate flue vents equipped with proper cleanout.

Technical data are listed below in the table.:

Both boilers
Water boiler
Steam boiler
Number of sections (pcs.)
Heating surface (m2)
Length (mm)
Weight (kg)
Water capacity (dcm3)
Nominal heating efficiency
Water capacity
Nominal heating efficiency
Water capacity
Steam rating
(kW)
(kcal/h)
(dcm3)
(kW)
(kcal/h)
(dcm3)
(kcal/h)
5
6,5
585
900
130
60
52000
170
54
45500
115
45500
6
8,0
710
1050
170
74
64000
205
66
56500
135
56500
7
9,5
835
1200
210
88
76000
240
78
66500
160
66500
8
11,0
960
1350
240
102
88000
275
90
77000
185
77000
9
12,5
1085
1500
280
116
100000
310
102
87500
205
87500
10
14,0
1210
1650
320
130
112000
345
114
98000
230
98000
11
15,5
1335
1800
360
144
124000
380
126
108500
255
108500
12
17,0
1460
1950
400
158
136000
415
138
119000
280
119000
13
18,5
1585
2100
440
172
148000
450
150
129500
300
129500