Specifications
KU boilers are flue fire-tube, large-capacity boilers with natural circulation of boiler water for the combustion of liquid and gaseous fuels. The combustion chamber size is designed so as to minimise emissions. The maximum design pressure of KU line boilers is 1.8 MPa. The maximum temperature of superheated steam t = 450°C. According to the temperature required, a specific type of super-heater is installed in the boiler. The boilers are supplied on a standard frame, including insulation with sheeting and a service platform. The supply includes the respective fittings, boiler valves and instruments and gauges. Upon the client's request, the boiler is also equipped with a feed pump and feed water control (modulated or ON-OFF). The boilers are fitted with fire-tube or water-tube economisers of feed water, thus increasing the boiler efficiency by 2 to 4 %. Condensation exchangers may be added next to the boilers, using condensation heat of water vapour contained in flue gases. The design, manufacturing, testing and additional equipment of boilers are done according to the CSN technical standards.
Boiler Characteristics
The boiler has excellent accumulating capacity, allowing for reliable operation even in the case of fluctuating steam extraction. This feature, however, does not restrict the boiler output and start-up (start-up time in cool state is from 15 to 20 minutes). The boiler construction facilitates maximum cooling of flue gases at a minimum heating surface and maximum reliability and service life. This feature is also connected with reduced quality requiments for water treatment. The output regulation scope is limited by the regulation scope of the combusting equipment.
Boiler Modulation
The basic modification is a steam boiler with saturated moderated-pressure steam extraction. The boiler can also be supplied in a modification for super-heated steam or hot water.
Equipment for steam-boiler plants operating without constant supervision
The boiler is ready for the installation of equipment for steam-boiler plants operating without constant supervision made by Gestra (supervision intevals every 2 - 24 - 72 hours according to TRD 602 and TRD 604).
TESTING AND CERTIFICATION
The transportable moderated-pressure boiler room is designed and produced according to the CSN standards in force, and the boiler holds a certificate of approved design, issued by the Safety Standards Inspectorate. The construction and the first pressure test in accordance with CSN 070623 are performed in the production plant, and the result is recorded in an inspection book, which is part of the technical documents supplied with the boiler room, together with a certificate of tests carried out on materials used in accordance with CSN 420090.
Technical Parameters - Universal Steam Boilers 200 kg/hour - 8000 kg/hour
Parameters | Units | KU 200 | KU 600 | KU 1000 | KU 2000 | KU 4000 | KU 5000 | KU 6000 | KU 7000 | KU 8000 |
Rated output | kg/hr | 200 | 600 | 800 | 2000 | 4000 | 5000 | 6000 | 7000 | 8000 |
Rated thermal capacity Saturated steam Super-heated steam (220°C) |
kW | 131 144 |
392 433 |
521 676 |
1303 1352 |
2606 2704 |
3258 3380 |
3910 4056 |
4561 4732 |
5213 5408 |
Maximum steam overpressure | MPa | 1,4 ; (0,6 ; 0,9 ; 1,8) | ||||||||
Minimum steam overpressure** | MPa | 0,2 - 0,4 | ||||||||
Nominal temperature of superheated steam* | °C | do 450 °C | ||||||||
Boiler efficiency: Natural gas / LO | % | 91/89 | ||||||||
Boiler efficiency with economiser: Natural gas / LO | % | 92 - 94 / 91 - 92 | ||||||||
Nominal temperature of feed water | °C | 105 (70) | 105 | |||||||
Nominal temperature of sucked air | °C | 20 | ||||||||
Maximum fuel consumption: - Natural gas - LO |
Nm3/h kg/hr |
14,5 14,7 |
43,6 44,2 |
76,7 68,7 |
154 137 |
300 275 |
375 354 |
466 412 |
554 481 |
621 550 |
Maximum of air for combustion (lambda=1,1) | Nm3/h | 155 | 465 | 860 | 1720 | 3400 | 4250 | 4900 | 5660 | 6500 |
Amount of flue gases | Nm3/h | 169,3 | 508 | 970 | 1940 | 3880 | 4850 | 5820 | 6790 | 7760 |
Electrical wiring | 3 x 380 V/50 Hz | |||||||||
Input of electric appliances (burner, feed pump) | kW | 6,5 | 9 | 6,5 | 9 | 11 | 11 | 14,5 | 18,5 | 22,5 |
Noise level | dB | Max.80 | ||||||||
Emissions*** | ||||||||||
Natural gas: - standard - low emission |
mg/Nm3 | NOx - 160, CO - 100 NOx - 100, CO - 100 |
||||||||
LO | mg/Nm3 | NOx - 450, CO - 175, SO 2 - 1000, solid substances - 100, smoke rate < 2 | ||||||||
KU Boiler weight | ||||||||||
Boiler weight without superheater | kg | 1600 | 2230 | 3050 | 7000 | 12500 | 13500 | 15500 | 17000 | 19500 |
Boiler weight with superheater | kg | 1800 | 2470 | 3400 | 8100 | 13500 | 14300 | 16400 | 18000 | 20600 |
Boiler operating weight | kg | 2300 | 3870 | 5800 | 11100 | 19500 | 20500 | 26500 | 27000 | 29500 |
* The nominal temperatureof superheated steam can be changed, depending on the client's request and the fuel used.
** According to the economiser used.
*** Emission relate to 3% of O2 in dry combustion products at t = 0°C and barometric pressure.
The given emission levels may be mainained only provided that the liquid fuel contains (except for values according to CSN 656506) maximally: S < 5 000 mg/kg, N < 1 000 mg/kg, asphaltenes < 3 %.
Technical Parameters - Univesal Steam Boilers 10000 kg/hour - 20000 kg/hour
Parameters | Units | KU 10000 | KU 12000 | KU 14000 | KU 16000 | KU 18000 | KU 20000 |
Rated steam output | kg/hr | 10000 | 12000 | 14000 | 16000 | 18000 | 20000 |
Maximum steam output | kg/hr | 11000 | 13200 | 15400 | 17600 | 19800 | 22000 |
Temperature of output steam* | °C | Saturated or superheated steam (to 450°C) | |||||
Design overpressure | MPa | 1,4 (or 0,6 ; 0,9 ; 1,8) | |||||
Minimum operating overpressure | MPa | 0,2 - 0,4 | |||||
Rated thermal capacity: Saturated steam Super-heated steam (220°C) |
MW | 6,5 6,7 |
7,8 8,4 |
9,1 9,4 |
10,4 10,7 |
11,7 12,1 |
13 13,4 |
Maximum thermal capacity: Saturated steam Super-heated steam (220°C) |
MW | 7,2 7,4 |
8,6 8,8 |
10 10,3 |
11,4 11,8 |
12,9 13,3 |
14,3 14,7 |
Minimal temperature of feed water | °C | 105 | |||||
Combustion air temperature | °C | 20 | |||||
Efficiency with economiser | % | 92 - 94,5 | |||||
Fuel consuption:* - Natural gas - LO |
Nm3/hkg/hr | 673 605 |
808 726 |
943 848 |
1077 968 |
1212 1090 |
1347 1211 |
Max. of air for combustion* | Nm3/h | 7191 | 8629 | 10068 | 11506 | 12944 | 14382 |
Amount of flue gases max.* | Nm3/h | 7861 | 9433 | 11005 | 12577 | 14149 | 15721 |
Boiler resistance at flue gas side-max. | Pa | 1250 | 1350 | 1350 | 1350 | 1350 | 1400 |
Temperature of flue gases at boiler output | °C | 120 - 180 | |||||
Boiler water volume | |||||||
At pressure test Operating - up to medium water level Of water heater |
m3 | 14,9 10,8 1,1 |
17,8 12,8 1,3 |
19,2 13,8 1,4 |
20,7 14,9 1,5 |
22,5 16,2 1,6 |
24,3 17,5 1,7 |
Sludge discharging - about 15s | - | Min. once every 8 hours depending on the quality of water | |||||
Maximum noise level of boiler | dB | 80 | |||||
Emissions*** | |||||||
Natural gas: - standard - low emission |
mg/Nm3 | NOx - 160, CO - 100 NOx - 100, CO - 100 |
|||||
LO | mg/Nm3 | NOx - 450, CO - 175, SO 2 - 1000, solid substances - 100, smoke rate < 2 | |||||
Transport/operating weight (Applies for design pressure of 1.4 MPa) |
t | 24,5 / 42,4 | 32,7 / 51,8 | 34,6 / 55,1 | 37,8 / 58,5 | 40,5 / 46 / 76,1 | 46 / 76,1 |
Technical changes are reserved |
* The nominal temperatureof superheated steam can be changed, depending on the client's request and the burned fuel.
** The values relate to the maximum boiler output at the steam pressure of 1.4 MPa, superheated steam temperature of 220°C and efficiency of 92%.
*** Emission relate to 3% of O2 in dry combustion products at t = 0°C and barometric pressure.
The given emission levels may be mainained only provided that the liquid fuel contains (except for values according to CSN 656506) maximally: S < 5 000 mg/kg, N < 1 000 mg/kg, asphaltenes < 3 %.
Universal Steam Boilers KU 200 - 1000 kg/hr
PROPORTIONS (mm) | ||||||||||
BOILER | A | B | C | D | E | F | G | H | J | K |
KU200 | 2250 | 1680 | 1000 | 800 | 1375 | 545 | 1365 | 1744 | 1800 | 2276 |
KU600 | 3500 | 1750 | 1900 | 900 | 1535 | 595 | 1525 | 2005 | 2450 | 3250 |
KU1000 | 3700 | 1800 | 1900 | 1000 | 1720 | 630 | 1705 | 2200 | 2830 | 3450 |
Technical changes are reserved |
Universal Steam Boilers KU 2000 - 8000 kg/hr
PROPORTIONS (mm) | ||||||||
BOILER | A | B | C | D | E | F | H | Ø D |
KU2000 | 4120 | 2550 | 2590 | 1200 | 2370 | 950 | 3230 | 320 |
KU4000 | 4900 | 2980 | 3250 | 1500 | 2812 | 1165 | 3670 | 505 |
KU5000 | 5655 | 2995 | 3430 | 1500 | 2812 | 1165 | 3711 | 505 |
KU6000 | 6055 | 3035 | 3630 | 1500 | 2812 | 1165 | 3725 | 505 |
KU7000 | 6400 | 3055 | 3800 | 1500 | 2812 | 1165 | 3725 | 636 |
KU8000 | 6610 | 3110 | 3930 | 1500 | 2812 | 1165 | 3765 | 636 |
Technical changes are reserved |
Universal Steam Boilers KU 10000 - 20000 kg/hr
PROPORTIONS (mm) | ||||||||
BOILER | A | B | C | D | E | F | H | Ø D |
KU10000 | 6600 | 3600 | 4600 | 2350 | 6400 | 600 | 4850 | 799 |
KU12000 | 6800 | 3600 | 4600 | 2350 | 6400 | 600 | 4850 | 799 |
KU14000 | 7095 | 3600 | 4600 | 2350 | 6600 | 600 | 4850 | 799 |
KU16000 | 7900 | 3750 | 5700 | 2400 | 7200 | 600 | 4855 | 799 |
KU18000 | 8785 | 3950 | 5700 | 2400 | 7400 | 800 | 5000 | 896 |
KU20000 | 9670 | 3950 | 5800 | 2400 | 8000 | 800 | 5000 | 896 |
Technical changes are reserved |