SZL Biomass Fired Boiler

SZL series is a horizontal water tube biomass boiler. It is fully automatic and modular for quick installation. Two models are available: SZL-A and D-type. (SZW model is with reciprocating/step grate)

Each biomass fuel is different. We customize the fuel feeding system, furnace, arch, combustion grate, soot blower, and flue gas system to match your fuel (consider calorific value, size, moisture, ash content, and ash melting point). This ensures efficient and stable combustion.

The design includes membrane water-cooled walls and arches, a larger and higher furnace, a wet-back combustion chamber, staged air distribution, and smoke purification. These features deliver high thermal efficiency, no slagging, no ash accumulation, and reliable continuous operation.

The SZL series burns biomass pellets, briquettes, wood chips, corn cob, rice husk, palm shell, walnut shell, cocoa shell, cashew shells, coconut shell, palm fiber, bagasse, urban wood waste, bark, production wood waste, olive pomace, coffee grounds, and high-moisture bulk biomass. It produces saturated/saturated steam or hot water for heating, drying, sterilization, cooking, turbine and other thermal applications.

Features

★ Large furnace and high combustion chamber extend fuel residence time. Staged air distribution and combustion boost fuel-oxygen mixing improving burnout rate, controlling temperature and preventing slagging

★ Membrane water-cooled walls and arches reduce air leakage and heat loss extending service life

★ Rational feeding and arch design prevent back-fire and pre-combustion

★ On-line soot blowers ensure no ash accumulation on heating surfaces

★ Well-arranged ash valves and cleaning doors facilitate ash conveying inspection and maintenance

★ Customized solutions save time and money. Customized designs for feeding, combustion, ash discharge, water treatment, and flue gas treatment systems, as well as boiler room layout.

Detailed Advantages

① No fuel size limit – Customized feeding and conveying methods are designed based on different fuel features and boiler models including hopper feeding, hydraulic pusher feeding and screw conveyor-sliding feeding ensure steady fuel feeding even distribution and precise combustion control.

② Three-step burning process (preheating + main combustion + burnout) – combustion efficiency ≥90%

③ Smart air control – multiple independent air chambers for precise airflow adjustment (preheating zone, drying zone, main combustion zone, coke zone, ash slag zone)

④ Active slag breaking and self-cleaning – moving/reciprocating grate breaks slag and removes ash automatically

⑤ Equipped with economizers and air preheaters further enhance fuel adaptability and thermal efficiency.

⑥ Wide load adjustment (30%-110%) with rapid response – adapts to production line fluctuations

⑦ PLC autoamtic control + HMI Touch screen – auto feeding, ignition, air-fuel ratio adjustment, ash removal, fault alarm and protection

⑧ Multiple environmental measures are adopted including multi-tube,wet scrubber or bag filter,ESP etc

⑨ Modular design – pre-assembled boiler body, feeding system, dust removal system, control system, reducing on-site work

⑩ Convenient maintenance – multiple inspection doors and observation holes for maintenance without shutdown

⑪ Optional denitrification equipment and fuel-adjusted SCR layout ensure low No. emissions and extend catalyst life.