A horizontal boiler is widely recognized for its compact layout, stable structure, and efficient heat transfer performance in industrial steam generation. Compared with vertical configurations, a horizontal boiler typically provides a larger furnace volume, longer flue gas flow path, and more sufficient heating surface arrangement within a relatively compact footprint. These structural characteristics allow the flame to expand fully inside the furnace, improve combustion efficiency, and enhance overall thermal performance. Because of its balanced design and convenient installation, the horizontal boiler has become a preferred choice in industries such as food processing, textiles, chemicals, pharmaceuticals, and light manufacturing.

In response to growing industrial demand for reliable and energy-efficient heating equipment, ZOZEN BOILER has continuously optimized its horizontal boiler product lines. By combining mature oil and gas combustion technology with advanced manufacturing standards, ZOZEN provides horizontal boiler solutions that support stable steam output, controlled emissions, and dependable long-term operation. Through careful structural design and precise engineering, ZOZEN ensures that each horizontal boiler meets the practical needs of industrial users seeking both performance and operational stability.

ZOZEN wns 3 ton gas-fired horizontal boiler

ZOZEN WNS Oil and Gas-Fired Steam Boiler: Features and Technical Advantages

Among ZOZEN’s horizontal boiler products, the WNS series oil and gas-fired steam boiler represents a mature three-pass wet-back structure designed for efficient and stable steam generation. As a typical horizontal boiler, the WNS series integrates the furnace and smoke tube sections into a compact horizontal shell, allowing flue gases to pass through the furnace and smoke tubes in three distinct passes before exiting through the chimney. This three-pass design extends the heat exchange path and enhances the utilization of fuel energy.

The WNS horizontal boiler adopts a large-diameter corrugated furnace, which increases the effective radiant heating area and strengthens the furnace’s resistance to thermal stress. The corrugated structure improves heat transfer while accommodating expansion and contraction during operation, contributing to stable long-term performance. The wet-back rear structure further enhances safety and reliability by improving sealing performance and reducing heat loss at the rear smoke chamber.

In terms of performance parameters, the WNS series covers steam capacities ranging from 1 ton to 20 tons per hour, with rated working pressures commonly up to 1.25 MPa and higher depending on configuration. The designed thermal efficiency can reach over 98% under standard operating conditions, reflecting the effectiveness of its three-pass heat transfer system and optimized combustion chamber layout. For industries that prioritize fuel economy and consistent steam supply, this level of efficiency supports practical operational cost control.

The combustion system of the WNS horizontal boiler is equipped with a compatible oil or gas burner that ensures stable flame formation and responsive load regulation. The burner precisely controls fuel supply and air distribution, promoting thorough combustion and reducing incomplete burning losses. When operating on fuel oil, the system maintains stable ignition and continuous heat release, making it suitable for facilities that require reliable heat supply under varying load conditions.

Automation and control are also central to the WNS series design. The horizontal boiler integrates an intelligent control system that monitors water level, pressure, temperature, and combustion status in real time. Through coordinated control of fuel feeding, air volume adjustment, and safety interlocks, the boiler maintains steady steam output while ensuring operational safety. These features make the WNS horizontal boiler adaptable to different industrial environments where stable steam quality is essential.

By combining a three-pass structure, corrugated furnace design, and efficient combustion system, the WNS series demonstrates how a well-engineered horizontal boiler can deliver dependable steam performance while maintaining structural integrity and operational efficiency.

Project Case: WNS3-1.25-Y Horizontal Boiler in Botswana

In Botswana, Africa, a fragrance manufacturing plant faced challenges in securing a stable and efficient heat supply for its production processes. Fragrance production requires controlled high-temperature conditions during distillation, extraction, and blending stages, and these processes depend heavily on a consistent supply of steam. Any instability in steam pressure or temperature can affect production continuity and product quality.

During the search for a suitable solution, the WNS3-1.25-Y horizontal boiler from ZOZEN BOILER came into consideration. This model, belonging to the WNS oil-fired steam boiler series, offers a rated steam capacity of 3 tons per hour and a rated working pressure of 1.25 MPa. As a horizontal boiler with a three-pass structure, it is designed to provide steady steam output while maintaining high thermal efficiency.

After installation, the WNS3-1.25-Y horizontal boiler demonstrated stable combustion performance supported by its efficient fuel oil burner and advanced control system. The three-pass flue gas path ensured effective heat absorption across the heating surfaces, allowing the boiler to convert fuel energy into steam with reliable consistency. For the fragrance plant, this translated into a stable steam supply that met the thermal requirements of its production lines.

Compared with traditional heat supply methods previously considered by the factory, the WNS horizontal boiler offered higher energy utilization efficiency and reduced pollutant emissions due to its optimized combustion system. The integrated control technology simplified daily operation and helped maintain stable pressure and water level conditions. As a result, the factory achieved improved production continuity while aligning its heating system with modern efficiency and environmental expectations.

The project in Botswana illustrates how a properly designed horizontal boiler can address real industrial heating challenges. By delivering reliable steam performance and practical operational advantages, the WNS3-1.25-Y horizontal boiler provided the fragrance plant with a stable foundation for sustained production.

Why Choose ZOZEN Horizontal Boiler Solutions

Selecting a horizontal boiler requires careful consideration of structural design, combustion performance, heat transfer efficiency, and operational safety. A well-designed horizontal boiler should provide sufficient furnace volume for complete combustion, an optimized flue gas path for effective heat exchange, and a durable shell structure capable of long-term operation under pressure.

ZOZEN BOILER integrates these design principles into its horizontal boiler products, particularly the WNS oil and gas-fired steam series. The three-pass wet-back structure enhances thermal efficiency and reduces heat loss, while the corrugated furnace improves heat absorption and structural flexibility. Automated control systems support stable operation and simplify management, allowing users to focus on production rather than complex boiler adjustments.

For industries seeking dependable steam generation, a horizontal boiler from ZOZEN represents a balanced combination of efficiency, stability, and practical engineering design. Through continuous technological refinement and project experience across global markets, ZOZEN BOILER provides horizontal boiler solutions that align with industrial heating requirements and long-term operational goals.

By choosing a ZOZEN horizontal boiler, enterprises can establish a reliable steam system that supports productivity, energy management, and sustainable development within their specific industrial environment.