What biomass boiler is suitable for burning sunflower husk as fuel at a capacity of 25 tons per hour?

Sunflower husk has a relatively low bulk density and may contain a considerable amount of ash, depending on its origin and processing method. A 25 t/h biomass steam boiler using sunflower husk should therefore be designed around continuous fuel feeding, stable combustion, ash removal, and dust control. For this application, the ZOZEN SZL series biomass steam boiler is a suitable product to evaluate.

The SZL series biomass steam boiler has a capacity range of 6–35 t/h and a working pressure range of 1–2.5 MPa. Its capacity range covers a 25 t/h application. The boiler uses a two-drum structure and a chain grate combustion system. The grate transports the sunflower husk through the furnace while the air-distribution system supplies combustion air in stages. This configuration supports continuous firing and is suitable for biomass fuels with different particle sizes.

Sunflower husk handling is an important part of the boiler system. Because the fuel is light and loose, the feeding system should be designed to reduce bridging and irregular feeding. The fuel bunker, screw conveyor, belt conveyor, rotary feeder, and inlet arrangement should be selected according to the fuel’s bulk density and moisture content. The final design may also include dust-control measures in the storage and feeding areas.

Ash characteristics should also be evaluated. Sunflower husk may produce ash with different melting behavior depending on its mineral content. Excessive ash accumulation can affect grate operation and heat transfer. The boiler system can therefore be arranged with suitable ash discharge equipment, inspection access, and cleaning procedures. The selection of the dust collector should also consider the flue-gas volume, ash concentration, and local emission requirements.

The 25 t/h SZL biomass steam boiler can be supplied as a boiler body or as part of a complete steam system. A complete configuration may include the fuel feeding system, grate, primary and secondary air fans, induced-draft fan, economizer, dust collector, chimney, feedwater pump, water treatment equipment, control cabinet, safety valves, and blowdown system. The auxiliary equipment can be adjusted according to the customer’s site conditions and supply scope.

The boiler control system can monitor steam pressure, drum water level, fan status, fuel feeding, and safety interlocks. Automatic feeding and combustion control help reduce the operator’s workload and support stable steam production when the fuel quality changes within the designed range. The actual control strategy should be finalized after the fuel test data and process steam requirements are reviewed.

Before preparing a detailed quotation, the project should confirm the sunflower husk moisture content, ash content, particle size, bulk density, available fuel quantity, required steam pressure, steam temperature, feedwater temperature, operating hours, emission standard, power supply, and installation altitude. These details affect the grate area, furnace design, fuel storage capacity, fan selection, dust collector, and chimney design.

ZOZEN supplies biomass boiler systems to overseas markets and provides support for design, manufacturing, delivery, installation guidance, commissioning, and maintenance. For a 25 t/h sunflower-husk-fired steam boiler, the SZL series provides a capacity-matched configuration with a fuel system that can be adapted to the actual characteristics of sunflower husk.