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
Boiler model

K-500M-2

K-720M-2

K-950M-2

K-1250M-2

K-1500M-2

Boiler type

vandens šildymo katilas su mechanizuota pakura, kaitrinių vamzdžių, plieninis

Nominal heating output (QN),  kW

495

720

950

1250

1500

Minimal heating output (Qmin),  kW

148

216

285

375

450

Efficiency, %

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, dm(l)

1340

1880

2800

3390

4700

Aerodinaminis pasipriešinimas, esant QN, ne didesnis kaip, 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

Dūmų išmetimo atvamzdžio matmenys, mm

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

Sąlyginis skersmuo, mm (coliai)

80 (3”)

80 (3”)

80 (3″)

80 (3″)

80 (3″)

flanšas, Ø mm

185

185

185

210

250

Mass (not greater than), kg

6650

8100

11300

13250

15900

 

 

Boiler M2

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

 

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