Water Tube Boilers: Industrial Applications and ZOZEN Solutions

The water tube boiler has become an essential part of modern industry thanks to its ability to generate large volumes of high-pressure steam with stability and efficiency. Unlike fire tube designs, where hot gases flow inside tubes surrounded by water, water tube boilers are characterized by water circulating inside the tubes while hot flue gases pass around them. This structure provides a larger heating surface, faster heat transfer, and higher efficiency, making water tube boilers especially suitable for industries with continuous, high-load steam demands.

Industries such as textiles, paper manufacturing, chemicals, food processing, building materials, and wood processing rely heavily on water tube boilers. They play a central role in processes like drying, sterilization, chemical reactions, and high-temperature treatment. With rising awareness of energy efficiency and environmental compliance, companies are increasingly seeking water tube boilers that can balance output stability, fuel flexibility, and emission control. Within this industrial landscape, ZOZEN Boiler has built a strong reputation as a professional manufacturer of water tube boilers, offering a wide range of biomass and coal-fired steam boiler solutions tailored to the operational needs of global clients.

SZL Water Tube Steam Boilers: Parameters, Technology, and Advantages

The SZL series represents ZOZEN’s advanced approach to water tube boiler technology. These boilers are primarily designed for coal and biomass fuels and are characterized by a double-drum, longitudinal arrangement that optimizes water circulation and steam generation. The water tube design allows rapid response to load changes and high-pressure steam production, making the SZL series ideal for industries with continuous or variable steam demand.

The SZL series incorporates large convective heating surfaces, economizers, and air preheaters, enhancing heat recovery and ensuring high dryness in the produced steam. These features make it suitable for energy-intensive industrial applications, such as wood processing, where high-temperature steam is required for thermal treatment, drying, and sterilization processes. The SZL water tube boiler can achieve evaporation capacities ranging from 6 to 35 tons per hour and working pressures between 1.0 and 2.5 MPa, covering a wide spectrum of industrial needs.

Automation and safety are also integral to the SZL design. Advanced control systems monitor steam pressure, furnace temperature, and fuel feeding status in real time, reducing operational risks and facilitating remote supervision. Maintenance is simplified due to the modular arrangement of the water tubes and chain grate system, minimizing downtime and operational costs. By combining water tube technology with optimized combustion, the SZL series provides a stable, high-efficiency, and environmentally conscious solution for industrial steam generation.

Technically, ZOZEN has designed the SZL boiler with graded air distribution and secondary air supply, which improves combustion efficiency by ensuring thorough mixing of air and fuel. The furnace arch and furnace chamber are optimized to match the characteristics of biomass fuels, reducing incomplete combustion and lowering unburned carbon levels. The boiler achieves thermal efficiencies above 86%, which is remarkable for biomass-fired systems.

In addition, the SZL series adopts a fully sealed water-cooled membrane wall structure, reducing heat loss and enhancing operational safety. It also includes modern automated control systems that monitor temperature, pressure, and fuel feeding in real time, making daily operation safe and straightforward.

This project highlights how ZOZEN’s water tube boilers can integrate with the resource characteristics of specific industries, transforming waste into a valuable energy source.

SZL Biomass Steam Boiler in Wood Processing

The application of water tube boilers can be clearly seen in the wood processing industry, where steam plays a decisive role in material treatment. Jiangsu Hongya Wood Co., Ltd., established in 2017, specializes in the production and processing of wood and wood-based products. From the very beginning, the company faced strict environmental regulations, and the adoption of clean, sustainable energy solutions became a priority.

During the processing of raw timber, Hongya Wood generates large amounts of scrap wood and byproducts such as bark and offcuts. Instead of discarding these, the company sought a solution to use them as renewable fuel. ZOZEN Boiler recommended the SZL biomass steam boiler, which was particularly suitable for this scenario.

The SZL boiler addressed two main challenges: the relatively low calorific value and high moisture content of wood-based fuels. To overcome these, ZOZEN optimized the fuel feeding hopper, grate width, and furnace design to accommodate the physical properties of the fuel. Graded air distribution and secondary air supply ensured complete combustion, while minimizing unburned carbon. The result was efficient energy conversion with boiler thermal efficiency exceeding 86%.

Furthermore, the boiler was equipped with a fully automated control system, reducing the number of operators required for daily monitoring. Real-time data collection and intelligent control functions enhanced both safety and convenience. By utilizing wood waste as biomass fuel, Hongya Wood not only achieved reliable steam supply for its production processes but also significantly improved its overall economic efficiency and environmental performance.

This project highlights how ZOZEN’s water tube boilers can integrate with the resource characteristics of specific industries, transforming waste into a valuable energy source.

Technical and Service Advantages of ZOZEN Water Tube Boilers

The success of ZOZEN’s water tube boilers lies in the combination of advanced technical features and comprehensive service support. On the technical side, products like the SZL biomass steam boiler and the DZL coal-fired steam boiler are designed to ensure efficient heat transfer, wide fuel adaptability, strong water circulation, and effective combustion systems. With large heating surfaces, sealed furnace structures, and automated operation, ZOZEN’s boilers provide both high thermal efficiency and long-term reliability.

On the service side, ZOZEN offers professional guidance from boiler selection and design customization to installation, commissioning, and operator training. Long-term maintenance support and spare parts supply are also available, ensuring that customers can maintain stable production without unnecessary downtime. For enterprises in industries such as textiles, food, paper, chemicals, and wood processing, choosing ZOZEN means partnering with a supplier capable of delivering not just equipment but also ongoing operational assurance.

As global industries continue to prioritize energy efficiency and environmental sustainability, the demand for water tube boilers remains strong. With decades of engineering expertise and a commitment to practical, customer-oriented solutions, ZOZEN Boiler continues to provide equipment that helps businesses achieve stable, efficient, and responsible energy utilization.