M2 series boilers (for wet fuel)

KALVIS M2 (500 kW – 1500 kW) series boilers are designed to be able to burn high humidity fuel – up to 55% of moisture content. To burn wet fuel in the most efficient way, boilers should keep the fuel in a high temperature combustion chamber for longer period of time. For this reason, boilers has “double” arch stones and moving step grate system is used. All boilers in this range are fully automated and designed to be able to connect hydraulic fuel supply equipment.

Benefits:

High efficiency (even for wet fuel)
Good ecological parameters
Possibility to control a boiler via internet (when Kalvis control panel is used)
Pneumatic cleaning of heat exchanger
High resistant bricks and fire grates
Each fire grates moving row has separate drives, so lifetime is prolonged due to that
Moving step grate system evenly distributes and displaces fuel in the furnace for high burning efficiency
Maximum fuel burning efficiency is ensured by providing primary and secondary air to separate zones below fire grates
Boiler is designed to burn saw dust and wood chips
Boiler life not less than 10 years
Easy maintenance and easy service works saves cost for that purpose
The modulating control of the boiler operation ensures a constant set temperature in real time
Installed flue gas recirculation function ensures optimal combustion process
Automated deashing system decreases the time spent on boiler maintenance

Product description

Boiler model		K-500M-2	K-720M-2	K-950M-2	K-1250M-2	K-1500M-2
Boiler type		water-fired boiler with mechanical furnace, incandescent pipe, steel
Nominal heating output (Q_N), kW		495	720	950	1250	1500
Minimal heating output (Q_min), kW		148	216	285	375	450
Efficiency, not less than %		85	85	85	85	85
Main fuel used		Saw dust, up to 55% moisture wood chips (length not longer than 50 mm)
Other fuels permitted to firing		wood logs, waste wood, peat and saw dust briquettes, coal
Fuel consumption, kg/h		224	325	430	565	678
Loading opening B x H, mm:		600×620	600×620	600×620	600×620	600×620
Furnace	H – height, mm	940	1100	1100	1100	1300
	B – width, mm	760	910	910	1100	1212
	L – length, mm	1880	1880	2800	2800	2980
	volume, dm³(l)	1340	1880	2800	3390	4700
Aerodynamic drag Q_N, not more than, Pa		470	650	870	1170	1410
Exhaust gas output temperature, °C		185	185	185	185	185
Exhaust gas volume, m³/h		1854	2697	3559	4631	5620
Dimensions of the smoke exhaust pipe		Ø350	Ø385	Ø480	Ø480	Ø480
Boiler working pressure, bar (MPa)		6 (0,6)	6 (0,6)	6 (0,6)	6 (0,6)	6 (0,6)
Minimum return water temperature during operation, ºC		60	60	60	60	60
Maximum permitted operating water temperature, ºC		110	110	110	110	110
Water flow, at Δt =20 ºC, t/h		5,97	30,96	40,85	53,75	64,5
Minimum water flow, t/h		8,51	12,38	16,34	21,5	25,8
Hydraulic resistance at Δt =20 ºC, mm H₂O st		0…144	0…282	0…430	0…490	0…510
Water volume in the boiler, m³		1,74	2,49	3,08	4,1	4,8
Heat exchange area, m²		34,2	49,7	76,6	103,8	126,4
Connection pipes	Conditional diameter, mm (inch)	80 (3”)	80 (3”)	80 (3″)	80 (3″)	80 (3″)
Connection pipes	Flange, Ø mm	185	185	185	210	250
Mass (not greater than), kg		6650	8100	11300	13250	15900

Dimensions

Boiler M2

M2 boilers dimensions

Boiler type	K-500M-2	K-720M-2	K-950M-2	K-1250M-2	K-1500M-2
H, mm	3107	3320	3480	3650	4800
L, mm	3520	3350	4450	3000	4750
A, mm	1200	1340	1400	1500	1640
C, mm	2260	2200	3000	4420	3200
E, mm	2720	2860	3050	3170	3260
F, mm	1900	2620	2400	2500	2620
M, mm	400	400	400	400	400
P, mm	Ø350	Ø385	Ø480	Ø480	Ø480

Schemes

M2 series boilers (for wet fuel)

Kalvis, UAB

Domestic boilers

Industrial boilers

Services