Chain Grate Boiler: Industrial Applications and ZOZEN Solutions

The chain grate boiler has long been recognized as one of the most widely used industrial boiler systems. Its defining feature is the chain-driven grate structure, which ensures the continuous feeding of solid fuel such as coal or biomass into the furnace. This allows for steady combustion, uniform heat release, and reliable steam generation. Unlike batch-fired boilers, the chain grate design provides stable operation, making it highly suitable for industries where consistent high-temperature steam is a necessity.

Key application areas for the chain grate boiler include textiles, paper manufacturing, food processing, chemicals, building materials, and power generation. In these industries, processes such as drying, sterilization, pulp heating, and chemical reaction require stable steam supply to guarantee product quality and production efficiency.

Within this industrial landscape, ZOZEN Boiler has established itself as a leading provider of chain grate boiler solutions. With decades of design and manufacturing expertise, ZOZEN combines advanced engineering with practical operation, enabling customers to achieve both energy efficiency and environmental compliance.

ZOZEN DZL and SZL Series Chain Grate Boilers

Among ZOZEN’s chain grate product lines, the DZL three-drum biomass steam boiler is a notable innovation. Unlike conventional single-drum configurations, this design integrates three drums, which significantly expands the heating surface and enhances water circulation. This feature ensures efficient heat absorption and stable steam output.One of the core advantages of the DZL biomass boiler is its anti-fouling design, which minimizes ash accumulation and fouling on heat transfer surfaces. This directly reduces the need for frequent cleaning, extends maintenance intervals, and maintains high operating efficiency. The chain grate feeding system allows a wide range of biomass fuels to be used, including wood chips, agricultural residues, palm shells, and forestry byproducts.

In terms of steam parameters, the DZL series typically offers evaporation capacities between 10 and 40 tons per hour, with working pressures ranging from 1.25 to 2.5 MPa. The large furnace chamber accommodates the high volatility of biomass fuels, ensuring complete combustion and reducing unburned carbon content. In addition, the adoption of a water-cooled membrane wall structure provides effective sealing, lowers heat loss, and prolongs the service life of the furnace.The inclusion of advanced combustion controls and safety monitoring systems further improves operational reliability. Operators can monitor furnace temperature, steam pressure, and fuel feeding status in real time, ensuring smooth and secure operation across different industrial applications.

The SZL series chain grate boiler is another flagship product of ZOZEN, designed primarily for coal as its main fuel. This series features a double-drum longitudinal arrangement, which optimizes steam-water circulation and provides a large heating surface for efficient heat transfer. The boiler capacity ranges from 6 tons to 35 tons per hour, with pressures commonly between 1.0 and 2.5 MPa.The chain grate mechanism delivers coal evenly into the furnace, guaranteeing stable and continuous combustion. Independent air chambers located beneath the grate allow for accurate air distribution, ensuring each section of the fuel bed receives sufficient oxygen. This design enables complete combustion even with coal of varying calorific values.The SZL series is also equipped with convective heating surfaces, economizers, and air preheaters, which together maximize heat recovery and improve thermal efficiency to around 81%. The produced steam has high dryness, which is essential for processes such as textile finishing, paper drying, and food sterilization.

Both the DZL biomass boiler and SZL coal boiler reflect ZOZEN’s commitment to delivering reliable chain grate boiler systems that align with industrial demands for efficiency, flexibility, and reduced emissions.

ZOZEN 40-Ton Biomass Steam Boiler in Paper Industry

A representative case highlighting ZOZEN’s capabilities involves a well-known paper manufacturing company. Paper production is an energy-intensive process, requiring large amounts of steam for pulping, drying, and finishing. The company had long been searching for an energy solution that could balance efficiency with environmental responsibility.

With the growing global emphasis on sustainability, the enterprise decided to transition from traditional fossil fuels to renewable energy. In this context, ZOZEN supplied a 40-ton chain grate biomass steam boiler to address the plant’s substantial thermal energy demand.

The boiler is equipped with an advanced biomass combustion system that efficiently converts a variety of biomass fuels into high-quality steam. This reliable steam supply ensured stable operation throughout the papermaking process, while also reducing the plant’s environmental footprint.

In addition, ZOZEN integrated modern control technologies into the system. Intelligent monitoring and automated regulation provided enhanced safety and efficiency. Operators could oversee critical parameters in real time, which minimized risks and improved production continuity. Through this project, the paper mill successfully achieved both production reliability and greener energy utilization, demonstrating the adaptability of ZOZEN’s chain grate solutions in a demanding industrial setting.

Technical and Service Advantages of ZOZEN Chain Grate Boiler

As industries worldwide continue to rely on solid fuel for steam generation, the demand for the chain grate boiler remains strong. From textiles and chemicals to paper manufacturing and food processing, the need for stable, efficient, and adaptable steam solutions is evident.

ZOZEN’s DZL and SZL series boilers combine robust technical features—such as optimized combustion, large heating surfaces, advanced water circulation, and flexible fuel adaptability—with reliable performance in real-world industrial projects. Beyond technical strength, ZOZEN emphasizes a comprehensive after-sales service system. This includes guidance during installation, professional training for operators, and long-term maintenance support.

Another advantage of ZOZEN is its ability to customize the chain grate boiler according to different fuel types, regional policies, and production requirements. For enterprises located in areas rich in agricultural biomass, the DZL series offers a cost-effective renewable solution, while companies with coal supply chains can benefit from the SZL series’ durability and stable performance. This flexibility ensures that each client receives a boiler system that is both technically suitable and economically sustainable.

For enterprises seeking dependable steam solutions, choosing a chain grate boiler from ZOZEN means not only investing in advanced equipment but also securing long-term operational stability and service assurance. By aligning engineering expertise with customer-focused support, ZOZEN Boiler continues to provide industrial clients with energy systems that deliver both performance and sustainability.