Export to Afghanistan: ZOZEN Boiler 25 tph Coal-Fired Steam Boiler for the Paper Industry

Type：Steam

Capacity：25 tph

Location：Afghanistan

Model：SZL25-1.25-AII

Case Introduction

An Afghan paper mill introduced a ZOZEN SZL series 25 t/h coal-fired steam boiler to provide a stable heat source for the paper machine dryer cylinders and pulping processes. Guided by a “larger capacity, higher cost-effectiveness” configuration strategy, the project achieved strong results in fuel adaptability, combustion efficiency, and execution assurance: thermal efficiency >81%, friendly multi-coal switching, engineers stationed on site for installation guidance, and a comprehensive documentation and training system—helping the customer achieve rapid production ramp-up and sustained, steady operation.

Industry Perspective: Key Steam Requirements for Papermaking

Continuous, stable steam supply: Dryer cylinders are sensitive to steam pressure and quality; fluctuations directly affect basis weight, smoothness, and sheet moisture.
Economics and availability: Regional fuel supply is uneven; equipment must accommodate multiple coal types to reduce fuel costs and supply risks.
Energy efficiency and maintainability: Efficient heat transfer, complete combustion, and a standardized O&M system are the foundation for lowering steam consumption per ton of paper over the long term.
Project execution capability: Cross-regional projects depend more on clear milestone management, on-site oversight, and complete documentation to shorten the path from installation to full production.
Key Technologies and Configurations

Broad fuel adaptability:
Compatible with bituminous coal, lean coal, anthracite, and other coal types, flexibly responding to local fuel supply and quality fluctuations.
Sufficient combustion design:
Chain grate with independent air chambers and zoned air distribution; precise air control ensures more complete combustion, improving thermal efficiency and combustion stability.
High-efficiency heat transfer structure:
Furnace with closely arranged water-cooled walls, paired with a customized boiler system solution to expand the radiant heating surface; overall boiler thermal efficiency >81%.

Customer Feedback

We chose ZOZEN Boiler for the reliability of its equipment and the professionalism of its team. After the 25 tph SZL boiler was commissioned, steam supply has been stable. Its wide fuel adaptability allows us to flexibly choose coal types based on local availability. ZOZEN engineers provided on-site guidance throughout the process, ensuring smooth installation and commissioning. The handover documentation was complete, and the operation and maintenance essentials were clear at a glance, giving us solid assurance for rapid ramp-up and long-term operation.