Water Tube Steam Boiler: ZOZEN’s Advanced Biomass-Fired Solutions

The water tube steam boiler is a widely adopted type of boiler in industrial production, known for its unique structure and operating characteristics. Unlike fire tube boilers, in which hot gases pass through tubes surrounded by water, water tube boilers circulate water within tubes while combustion gases flow around them. This design provides a larger heat transfer surface and allows the boiler to operate at higher pressures and capacities. As a result, water tube steam boilers are particularly suited for applications that require continuous and stable steam supply, as well as industries where efficiency and safety are critical.

Typical industries that use water tube steam boilers include textiles, food and beverage, chemicals, pharmaceuticals, building materials, and paper production. The ability of water tube boilers to generate high-quality steam efficiently ensures smooth industrial operation and improved product quality. Additionally, the design of a water tube steam boiler allows it to respond quickly to fluctuating load demands, which is a major advantage in industries with variable production requirements.

With more than 30 years of experience in boiler design and manufacturing, ZOZEN combines cutting-edge technology with practical engineering expertise to deliver reliable and customized solutions for global industrial clients.

Specifications and Advantages of ZOZEN SZL Biomass-Fired Steam Boiler

Among ZOZEN’s product lines, the SZL series biomass-fired water tube steam boiler stands out as a representative model. The SZL series is designed with a double-drum, chain-grate configuration, and is suitable for medium to large-scale industrial operations. Its capacity typically ranges from 6 tons to over 35 tons of steam per hour, with working pressures between 1 and 2.5 MPa, making it versatile for a wide range of production needs.

One of the most notable design features of the SZL series is the arrangement of water tubes and membrane water walls. The furnace section adopts a dense arrangement of water-cooled wall tubes, which greatly expands the radiant heat absorption area and enhances thermal efficiency. The double-drum structure, combined with a horizontal layout, ensures stable water circulation and effective separation of steam and water. This allows the boiler to produce high-quality, saturated steam while maintaining operational safety.

In terms of combustion system design, the SZL water tube steam boiler is equipped with an advanced chain grate and independent wind chamber structure. The grate ensures even distribution of fuel across the furnace, while the multiple wind chambers allow precise regulation of primary and secondary air supplies. This promotes full combustion of biomass fuel, reduces carbon content in ash, and increases overall fuel utilization. As a result, the boiler achieves thermal efficiency levels of 86% or above when operating under standard conditions.

Another key advantage of the SZL series lies in its adaptability to a wide range of biomass fuels, such as wood chips, rice husks, palm shells, and other agricultural residues. This flexibility allows enterprises to utilize locally available renewable resources, lowering fuel costs and promoting sustainable energy development. Furthermore, the boiler incorporates advanced flue gas treatment systems, including multi-stage dust collectors and desulfurization devices, to reduce emissions of smoke, sulfur dioxide, and nitrogen oxides. This makes it compliant with strict environmental regulations while supporting the green transition of industrial enterprises.

The water tube steam boiler design also improves operational reliability and reduces maintenance needs. The large furnace chamber not only improves combustion stability but also minimizes slagging and fouling on heating surfaces. The self-cleaning effect of the convection heating surface further extends maintenance intervals, ensuring longer continuous operation. Additionally, ZOZEN provides intelligent control systems that allow operators to monitor boiler parameters such as steam pressure, temperature, and water levels in real time, ensuring safe and efficient performance.

Biomass Water Tube Steam Boiler for a Biotechnology Company

A biotechnology company, recognized as a national high-tech enterprise, faced growing production demands with the rapid expansion of the health food market. For products such as herbal pastes, enzyme-based supplements, and functional extracts, the processes of extraction, concentration, and sterilization all require a consistent supply of high-quality steam. At the same time, the company emphasized energy efficiency, environmental compliance, and cost control in its energy systems.

To address these challenges, ZOZEN recommended its SZL series biomass-fired water tube steam boiler. This solution combined advanced international technology with excellent adaptability to meet the customer’s strict requirements. The chain-grate combustion system, paired with an independent wind chamber design, enabled precise distribution of air and fuel, ensuring complete combustion of biomass pellets. This not only stabilized steam output but also reduced operating costs by maximizing fuel utilization.

The furnace of the SZL water tube steam boiler was designed with densely arranged water-cooled walls, significantly increasing heat absorption and boosting thermal efficiency to more than 86%. This efficiency gain translated into reduced fuel consumption and direct savings for the company. The boiler’s ability to provide reliable steam output during high-load production cycles ensured uninterrupted operation of critical processes such as concentration and sterilization.

Equally important, the environmental performance of the SZL biomass boiler aligned with the company’s sustainability goals. The use of clean, renewable biomass fuel, coupled with a comprehensive flue gas treatment system, reduced emissions of dust, sulfur dioxide, and nitrogen oxides. This allowed the biotechnology company to meet strict environmental standards while reinforcing its commitment to green development. By integrating the SZL water tube steam boiler into its production system, the company successfully enhanced product quality, optimized energy use, and built a solid foundation for future growth.

Choosing ZOZEN Water Tube Steam Boilers

The characteristics of the water tube steam boiler—including its high efficiency, large capacity, and ability to adapt to demanding industrial environments—make it an essential choice for many enterprises.

Beyond the boiler itself, ZOZEN distinguishes itself through comprehensive service. From project design consultation and equipment selection to on-site installation guidance, operator training, and after-sales maintenance, the company provides end-to-end support. This ensures that customers not only acquire the right water tube steam boiler specification but also enjoy long-term reliability and efficiency throughout the equipment’s lifecycle.

For enterprises seeking to balance production needs with sustainability and cost control, ZOZEN’s water tube steam boiler solutions offer a dependable and forward-looking choice. By combining decades of engineering expertise with continuous innovation, ZOZEN Boiler remains a trusted partner for global industries striving for efficient and sustainable energy solutions.