SZL Water Tube Boiler

Water tube boilers are designed for larger, high-pressure, and superheated steam applications. Biomass fired water tube chain grate boiler is a good example. Membrane water cooling wall structure in combustion chamber, good sealing to prevent heat loss. It is widely used in textile factory, paper factory, food industry, generating steam in industry process. SZL series water tube boilers were sold to Iran, Mongolia and Vietnam.

SZL Water Tube Boiler

    6-30 t/ 4.2-21 MW

  • Pressure


  • Fuel

    Biomass Fuel, Rice Husk, Bagasses

  • Application

    Food Industry, Heating Supply


Membrane water cooling wall structure

By adopting the water-cooling system in packaged boilers which is usually used in power plant boilers, the boiler can achieve large heat transfer area, high heat transfer efficiency, low heat loss, good air tightness, and no distortion or dust leakage of the brickwork.


Inverted α furnace arch design

a.Longer fuel combustion period. Front arch is higher and shorter than rear arch, 45°angle between the two arches, which can extend the time of flue gas combustion time, and enhance thermal transferring efficiency.

b.Available to burn various biomass. It design can burn biomass fuels such as rice husk, wood, bagasse, straw, sawdust, sunflower shells, as well as low calorific value coal.


Burning effect is good

Wind is feed from both sides of the boiler. There are six independent air chambers, each of them has independent air adjustment device which can respectively adjust the air volume so as to achieve the best combustion effect.

Long grate, strong overload capacity

The distance between the front shaft and the rear shaft of the grate stoker is longer than other similar type products. In this way, the combustion time of the fuel in the furnace is extended and the fuel combustion is more sufficient and the carbon content in the slag is decreased. Meanwhile, the actual heating surface of the grate is increased and the overload capacity is remarkably enhanced.

SZL series Biomass steam boiler
Model Rated Steam Capacity Rated Steam Pressure
Rated Steam Temperature
Rated Water Temperature
Fuel Type
t/h BHP
SZL4-2.5-T 4 306 25 226 20 Biomass fuel,
Bituminous coal, 
Anthracite coal
SZL6-1.25-T 6 460 12.5 194 20
SZL8-1.25-T 8 613 12.5 194 20
SZL10-1.25-T 10 766 12.5 194 20
SZL12-1.25-T 12 919.2 12.5 194 20
SZL15-1.25-T 15 1149 12.5 194 105
SZL20-1.25-T 20 1532 12.5 194 105
SZL25-1.25-T 25 1915 12.5 194 105
SZL30-1.25-T 30 2298 12.5 194 105
SZL30-2.5-T 30 2298 25 226 105
SZL Biomass hot water boiler
Model Thermal power Outlet Water Pressure
Outlet Water Temperature
Raturn Water Temperature
Fuel Type
SZL7-1.0/95/70-T 7 714 10 95 70 Biomass fuel,Bituminous coal, Anthracite coa
SZL7-1.0/115/70-T 7 714 10 115 70
SZL14-1.0/95/70-T 14 1428 10 95 70
SZL14-1.25/115/70-T 14 1428 12.5 115 70
SZL14-1.25/115/70-T 14 1428 12.5 115 70
SZL17.5-1.25/115/70-T 17.5 1785 12.5 115 70

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