SZL Series Biomass Chain Grate Boiler

Type: Steam丨Hot Water Boiler Capacity/Hot Power: 6 - 25Ton / 4.2 - 17.5MW Pressure: ≤1.6MPa (16bar) Fuel: Biomass Fuel, Rice Husk, Bagasse Application: Central Heating, Industrial Process Steam Supply


Brief Introduction:

SZL series biomass chain grate boilers with high efficiency, strong overload capacity and various fuel adaptability (biomass pallet or coal), are well known as the best design among contemporary domestic similar products and have reached the world's advanced level. The boiler is mainly composed of upper and lower drums, convection tubes, water-cooling wall tubes, down pipes and headers. The upper and lower drums are arranged longitudinally and with belt type chain grate as its combustion equipment and non-polar speed-changing device drivers. The boiler proper is composed of upper and lower longitudinal drums and convection tubes. With the arrangement of the Φ51*3 pipes in the combustion chamber as the water-cooling wall, water-steam separation device and continuous sewage device in the upper drum and periodical sewage device in the lower drum for assure steam quality. Equipped continuous automatic feeding water device for making sure that the boiler can be safely operated. The economizer is laid at the end of the boiler. 

Biomass Fired Fuels Include:

    Shaped biomass fuel, sugarcane bagasse, rice husk and rice straw, coconut shell, palm kernel shell(pks), peanut shell, agricultural waste, wood pellet/chips, sawdust, coal,biomass, co-firing.


It is mainly used for heating supply in winter, central heating supply and industrial process steam supply.




  • 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.
  • The front and back water-cooling wall tubes stretch themselves to the upper side of the chain grate, which increases the heating surface and overload capacity. The frames of the front and the rear arch are made of water-cooling tube wall, together with high-alumina cement, which can avoid the defects of the cracking and collapsing of the arch and extend its lifespan.
  • The distance between the front shaft and the rear shaft of the grate stoker is longer than other similar type domestic 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.
  • There are six independent wind chambers arranged lengthways and each chamber has an independent air adjuster, which can respectively adjust the air volume in each chamber so as to achieve the best combustion effect.


SZL series Biomass steam boiler SZL series Biomass hot water boiler Unit Converters
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
Model Rated Steam Capacity Rated Steam Pressure
Rated Steam Temperature
Rated 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


20 Ton Biomass Circulating Fluidized Bed Boiler

Type:Biomass fired CFB boiler Capacity/Hot Power:20 tons Pressure:3.82MPa Application:Power generation Project site:China view all content
  • 20 Ton Biomass Circulating Fluidized Bed Boiler Type:Biomass fired CFB boiler Capacity/Hot Power:20 tons Pressure:3.82MPa Application:Power generation Project site:China
  • 150 Ton Biomass Fired Power Plant Project Type:Biomass CFB power plant Capacity/Hot Power:150 tons Pressure:3.82MPa Application:Power generation Project site:China
  • Tanzania Biomass Boiler for Feed Processing Industry Type: DZL4-1.25-T biomass boiler Capacity/Hot Power:4 tons Pressure: Application:Feed processing Project site:Tanzania
  • 4 Ton Biomass Fired Boiler Exported to Bali Indonesia Type:Biomass boiler Capacity/Hot Power:4 tons Pressure:1.25Mpa Application:Industrial zone Project site:Bali Indonesia
  • 7MW Hot Water Biomass Boiler for Heating Type:Biomass boiler Capacity/Hot Power:7 MW Pressure:1.0 MPa (10bar) Application:District heating Project site:Luoyang, China

Get An Instant QuotationGet a tailored solution >>

For all inquiries, please fill in the form below (* are required) to send us a brief message, and we will get back to you as soon as possible.


Boiler Autoclave

Textile industry Waste heat recovery AAC block Plant Hotel & Resort Food plant Power plant Paper mill CHP Other