SZL Series Biomass Fired Hot Water Boiler

Hot water

SZL Series Biomass Fired Hot Water Boiler

SZL series biomass-fired hot water boiler is package or shop-assembled water pipe boiler with double steam drum and chain grate stoker structure. 4-6 tph boiler is package boiler and 6-35 tph is shop-assembled structure, which is composed of 2 parts, upper part is heat absorbing surface and lower part is combustion equipment. The former part of boiler body is surrounded by membrane wall, its upper part connects with boiler drum and lower part connects with header, which forms a combustion chamber to absorb the radiated heat from furnace; there are dense convection tube bundle between the back side of upper and lower drum, the high temperature smoke enters a separate economizer after flushing heat absorbing surface then discharge from chimney.

Product thermal capacity: 2.8-29 MW

Working pressure: 10-12.5 Bar

Available fuel: Biomass molding granules, wood chip, corn cob, saw dust

Our boiler products are applied in these enterprises.

Product Advantages


Sufficiency output, high thermal efficiency of 88% and above

Reasonably arranges the furnace arch, furnace wall and furnace heating surface; adopts separate air chambers to ensure the complete combustion of different biomass fuels

Reliable and stable boiler operation for a long time

Selects suitable grate bar materials with high temperature resistance to improve the grate reliability and ensure the safe boiler production


    NC cutting


    Cut edge


    Intelligent welding


    Drilling and reaming

Product parameters

Model Rated thermal power(MW) Rated working pressure(MPa) Rated output water temperature(℃) Return water temperature(℃) Maximum transport size(m)
SZL2.8-0.7/95/70-All 2.8 0.7 95 70 7.4×2.7×5.3
SZL4.2-1.0/115/70-AⅡ 4.2 1 115 70 7.0×2.7×3.5
SZL5.6-1.0/115/70-AⅡ 5.6 1.0 115 70 6.9×3.2×5.3
SZL5.6-1.25/130/70-AⅡ 5.6 1.25 130 70 6.9×3.2×5.3
SZL7.0-1.0/115/70-AⅡ 7 1.0 115 70 7.9×3.3×3.5
SZL7.0-1.25/130/70-AⅡ 7 1.25 130 70 7.9×3.3×3.5
SZL14-1.0/115/70-AⅡ 14 1.0 115 70 11.0×3.2×3.5
SZL14-1.25/130/70-AⅡ 14 1.25 130 70 11.0×3.2×3.5
SZL21-1.0/115/70-AⅡ 21 1.0 115 70 9.9×3.3×3.6
SZL21-1.25/130/70-AⅡ 21 1.25 130 70 9.9×3.3×3.6
SZL29-1.0/115/70-All 29 1.0 115 70 8.0×3.8×3.8
SZL29-1.25/130/70-All 29 1.25 130 70 8.0×3.8×3.8

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Awards & Honors

certificate certificate

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Hot water/oil Steam