In many manufacturing sectors, steam plays a decisive role in supporting production stability, product quality, and energy management. As companies continue to shift toward cleaner fuel sources and more economical thermal systems, the boiler chain grate structure has become widely adopted due to its balanced combination of fuel adaptability, steady combustion performance, and reliable heat output. A boiler chain grate system transports solid biomass or coal-based fuel across the furnace through a continuous moving grate.

With these evolving industrial demands, ZOZEN BOILER has developed a mature portfolio of biomass-fired steam boilers equipped with advanced boiler chain grate systems. Years of engineering experience, precise material selection, and an understanding of combustion behavior allow ZOZEN to provide equipment that supports long-term, stable steam output while meeting environmental requirements

SZL and DZL Series Biomass Steam Boilers: Structure, Technology, and Performance Advantages

ZOZEN’s SZL biomass steam boiler, a typical assembly-type water tube boiler equipped with a boiler chain grate, is designed for customers whose production processes require long hours of stable steam supply. The boiler adopts a double-drum vertical arrangement, which provides a large heating surface and stable water circulation. The furnace section is surrounded by tightly welded membrane walls that directly absorb the furnace’s radiant heat while maintaining strong sealing performance. These membrane walls form an enclosed and efficient combustion chamber that helps fuel burn more completely as it moves forward on the boiler chain grate.

ZOZEN 10 ton SZL biomass-fired chain grate boiler

The SZL boiler chain grate system supports a wide range of biomass fuels, including wood chips, agricultural residues, and biomass pellets. The grate’s segmented control structure helps fuel burn evenly, and the air distribution system—designed with multiple independent air chambers—ensures proper oxygen supply at each stage of combustion. This helps improve fuel utilization while reducing unburned carbon. After combustion, high-temperature flue gas passes through multiple convection tube banks arranged between the upper and lower drums, transferring heat efficiently before reaching the economizer and dust collector. With this configuration, the SZL boiler provides consistent steam output and strong adaptability to variable load conditions, which is crucial for industries where consumption fluctuates throughout the day.

The DZL biomass steam boiler is another key product built around the boiler chain grate principle. Unlike the double-drum SZL model, the DZL series adopts a single-drum longitudinal layout, a structure that simplifies installation while ensuring stable operation. Its threaded smoke tubes and large furnace chamber help increase heat-absorption efficiency, while the boiler chain grate allows continuous, controlled fuel feed without manual intervention. The DZL series is known for its compact heat-transfer layout and strong draft system, giving enterprises the ability to maintain steam quality even under changing production demands.

A well-engineered boiler chain grate system requires uniform speed control, balanced air distribution, and appropriate resistance to temperature deformation. ZOZEN integrates these technical considerations through optimized grate materials, improved mechanical strength, and refined air chamber design. As the fuel layer moves along the grate, the staged combustion process ensures full burning, which supports stable steam output and reduces the generation of excess ash. This helps maintain cleaner heat-transfer surfaces and reduces daily maintenance frequency. Additionally, ZOZEN applies an advanced automatic control system to its SZL and DZL boilers, allowing operators to adjust steam parameters, combustion conditions, and grate speed according to real-time needs. This makes the boiler chain grate system not only flexible but also efficient in managing fuel consumption and thermal energy distribution.

Application Case: Boiler Chain Grate Solution for a Large Garment Industrial Park

A large garment industrial park sought a thermal solution capable of supporting multiple production workshops and interconnected processing lines. The facility required a continuous supply of steam and heat for applications such as fabric washing, dyeing preparation, ironing, drying, environmental control, and auxiliary equipment operation. Given the fluctuations in production volume across different seasons and product cycles, the customer needed a boiler room that could operate flexibly while maintaining high energy efficiency and compliance with environmental policies.

After evaluating the customer’s layout, steam load requirements, and available fuel resources, ZOZEN BOILER designed and supplied a system consisting of two 10-ton biomass steam boilers using the boiler chain grate structure, arranged as “one in operation and one in reserve.” This configuration allows the garment industrial park to activate both boilers during peak demand or run only one boiler during periods of lower consumption. Such flexibility helps maintain an economical operating pattern, ensuring that the boiler chain grate combustion remains efficient under different loads.

The SZL-based 10-ton biomass steam boiler used in this project reflects the advantages of the boiler chain grate in real industrial operation. The chain grate ensures steady fuel movement, controlled combustion, and consistent heat release, enabling the boiler to produce stable steam that supports continuous garment production. The furnace structure and heat-transfer surfaces further enhance thermal performance, allowing the steam supply to remain steady even when fuel characteristics vary slightly. Additionally, the system fulfills the emission standards required for the local environmental policies, due to the combination of efficient combustion, optimized air flow, and subsequent dust control equipment.

The customer benefits from reduced energy consumption compared with many conventional biomass boilers on the market. With balanced boiler chain grate combustion and well-designed convection heating surfaces, the system delivers strong steam output without excessive fuel waste. This performance helps the garment industrial park maintain operational continuity while controlling production costs and environmental impact.

Why ZOZEN BOILER Is a Trusted Supplier in the Boiler Chain Grate Market

The steady performance of a boiler chain grate system is deeply connected to its structural design, combustion stability, material strength, and long-term maintenance considerations. ZOZEN has spent years refining these technical details across its SZL and DZL biomass boilers, giving customers confidence in steam supply, combustion reliability, and operational duraboiler chain gratebility. From furnace arrangement and drum configuration to air-distribution control and grate structure, every component is engineered with the goal of achieving consistent combustion and efficient heat transfer.

ZOZEN’s service system further strengthens its value to customers. The company supports each project through technical consultation, design evaluation, equipment manufacturing, installation guidance, commissioning, and long-term maintenance assistance. This ensures that each boiler chain grate solution performs according to the customer’s production needs and remains reliable through years of operation.