Chain Grate Boiler Manufacturers

1. What is a chain grate boiler

A chain grate boiler is a solid-fuel-fired boiler that transports fuel across the combustion chamber on a moving grate made of interlinked metal bars. Typical fuels include wood waste, biomass pellets, rice husks and other agricultural residues; as the grate advances, fuel progresses through drying, ignition, combustion and ash discharge stages.

You should consider a chain grate boiler when your site relies on bulk solid fuels or has access to abundant biomass. Common applications include rural and industrial facilities with plentiful agricultural residues, small-to-medium process heating where uninterrupted operation is required, and projects seeking a low-cost, robust fuel solution.

Demand for chain grate boiler manufacture has risen for several reasons. Modern chain grate boiler manufacture emphasizes improved combustion control, reduced unburnt carbon and easier maintenance versus older solid-fuel boilers. Advances in automation—such as smart feeders, adaptive combustion control and automated ash handling—have boosted reliability and reduced labor needs. Finally, tighter emissions regulations have prompted manufacturers to integrate staged combustion, flue-gas recirculation and downstream treatment, features now commonly found where quality chain grate boiler manufacture is practiced.

2. ZOZEN’s Third-Generation DZL Biomass Steam Boiler 

As one of the leading chain grate boiler manufacturers, ZOZEN Boiler has developed a third-generation DZL series designed specifically to address common challenges of biomass combustion—most notably ash accumulation, clinker formation, and inconsistent fuel characteristics. ZOZEN’s DZL third-generation anti-clinker biomass steam boiler represents a refined chain grate solution with improvements in combustion efficiency, reliability, and maintainability.

Key advantages

• Anti-clinker grate design: ZOZEN DZL third-generation grate features optimized bar geometry, variable grate speed control, and targeted primary air distribution to minimize ash fusion and clinker formation. This reduces downtime for cleaning and extends operating runs between manual maintenance.
• Adaptive combustion control: Integrated PLC-based control continuously monitors flue gas oxygen, temperature profiles, and pressure differentials to adjust fuel feed rate, grate speed, and primary/secondary air splits. The dynamic control maintains complete combustion across a wide range of biomass fuel types and moisture levels.
• High thermal efficiency(＞88%) : With improved heat-exchange surface layouts and optimized combustion chamber flow, the DZL third-generation chain grate boiler achieves competitive thermal efficiency for biomass-fired steam generation. This increases fuel utilization and lowers operating costs.
• Robust ash handling and maintenance access: The DZL’s automated ash discharge and access hatches simplify ash removal and routine checks. The design reduces manual labor and allows safe, efficient maintenance procedures.
• Flexible fuel adaptability: The boiler accepts a variety of biomass fuels—pellets, chips, husks, and mixtures—without extensive pre-processing, making it suitable for facilities with mixed feedstocks.

Main Specifications

Thermal capacity: 10-40 t/h
Working pressure: 1.25 MPa / 1.6 MPa / 2.5 MPa
Outlet temperature: 194℃ / 204℃ / 225℃
Available fuel Biomass: pellets, rice husks, wood chips, palm shells, sawdust, etc.

Cases

Since the establishment of General Rubber Thailand Co., Ltd. in 2019, it has not only successfully achieved an annual production capacity of 7.3 million sets of various types of tires, but also through technological innovation and capacity expansion, the annual production capacity has been increased to 16 million sets of semi-steel radial tires and 1.3 million sets of all-steel radial tires.

Steam boilers have a wide range of applications in the rubber and tire industry, including key production processes such as vulcanization, drying and curing, and thermal energy supply. The 40-ton DZL series biomass steam boiler from ZOZEN has provided strong support for the production of General Rubber Thailand Co., Ltd.

1. Environmental Friendliness: The use of biomass fuel has significantly reduced carbon emissions in the production process, aligning with global environmental protection trends.

2. Efficiency: With a thermal efficiency of up to 87.5%, it ensures the efficient use of energy and reduces production costs.

The cooperation between ZOZEN and General Rubber Thailand Co., Ltd. this time is not only an important upgrade for the Thai rubber industry but also another successful case of ZOZEN Boiler in the overseas market.

Recently, ZOZEN Boiler provided a 20-ton biomass steam boiler of the DZL series to a cottonseed oil factory in Tanzania, meeting its production needs.

The cottonseed oil factory in Tanzania was looking for a boiler solution that could meet production needs while reducing environmental impact. ZOZEN Boiler won the trust of the customer with the third-generation biomass steam boiler of the DZL series. Currently, the boiler has been shipped, and the site is busily constructing the foundation.

The innovation of the DZL series boiler lies in its chain grate and independent wind chamber design, which not only ensures the full combustion of fuels such as biomass molding pellets, rice husks, wood chips, corn cobs, and sawdust, but also achieves a thermal efficiency of over 87.5%. The boiler body is equipped with water-cooled walls around the front and convection tubes between the upper and lower drums at the back. After the high-temperature flue gas passes through these heat-absorbing surfaces, it goes through the economizer and dust remover, and is finally discharged by the chimney, optimizing the conversion and utilization of thermal energy.

This cooperation not only demonstrates ZOZEN Boiler’s professional capabilities in the field of biomass energy utilization but also provides the Tanzanian cottonseed oil factory with an efficient and environmentally friendly energy solution, which helps to reduce production costs.

3.ZOZEN’s strengths as a chain grate boiler manufacture and its support network

Scaled production and bespoke engineering: As a leading chain grate boiler manufacture, ZOZEN operates modern fabrication facilities with CNC machining, automated welding lines and dedicated assembly workshops. This production scale ensures consistent quality and the ability to rapidly fulfill large orders. ZOZEN’s engineering teams provide customized designs that account for fuel characteristics, site constraints and process requirements, ensuring each chain grate boiler is optimized for reliable performance and easy maintenance.

Strong R&D and performance validation: ZOZEN, a specialist chain grate boiler manufacture, invests heavily in research to improve combustion efficiency, minimize clinker formation, extend grate component life and reduce emissions. New designs undergo prototype testing and rigorous performance validation before full production, ensuring delivered boilers meet demanding operational targets.

Robust quality management and certifications: In its role as a trusted chain grate boiler manufacture, ZOZEN enforces comprehensive QA/QC processes, pressure-vessel testing and factory acceptance tests. The company holds domestic and international certifications that facilitate compliance with regulatory requirements and market access.

Turnkey project delivery: ZOZEN offers end-to-end services—from feasibility studies and detailed engineering to fabrication, on-site installation supervision, commissioning and operator training. This turnkey capability, provided by an experienced chain grate boiler manufacture, reduces client coordination burden and shortens project lead times.

After-sales, digital support and localized service: ZOZEN maintains a global network of field service engineers and spare-parts warehouses to ensure rapid maintenance response and parts availability. The company offers maintenance contracts, operator training and remote monitoring with data-driven diagnostics to enable condition-based maintenance and early fault detection. Local partnerships further improve response times for installation, maintenance and compliance.

Conclusion
Chain grate boilers remain a pragmatic and increasingly popular choice for facilities that rely on solid fuels—especially in regions with abundant biomass or where fuel cost and availability make combustion of residues attractive. As one of the leading chain grate boiler manufacturers, ZOZEN’s third-generation DZL anti-clinker biomass steam boiler demonstrates modern advances in grate design, combustion control, emission performance, and automation. Supported by strong manufacturing capabilities, R&D, certifications, and a comprehensive global service system, ZOZEN stands out among chain grate boiler manufacturers as a reliable provider of efficient, low-maintenance solid-fuel steam solutions.