Water-Tube Shell Type Biomass Boilers

Advanced DZL Series Water-Tube Shell Type Biomass Boilers

The DZL series represents a new generation of high-efficiency, eco-friendly biomass boilers, meticulously engineered to combine the benefits of water-tube and fire-tube (shell) boiler designs. This innovative hybrid structure delivers exceptional thermal performance, robust reliability, and operational flexibility. Designed specifically for the efficient combustion of various biomass fuels, these boilers are an ideal solution for industrial steam and heating applications, providing a sustainable and cost-effective energy source.

Key Features and Technological Advantages

• 1. Superior Thermal Efficiency: By incorporating high-efficiency heat transfer elements, such as threaded smoke tubes, and optimizing the flue gas velocity, the boiler's actual thermal efficiency is 6-8 percentage points higher than the national standard, ensuring maximum energy utilization and reduced fuel costs.
• 2. Enhanced Structural Durability: The design features convex tube sheets and threaded tubes, which transform the boiler shell from a quasi-rigid body into a quasi-elastic one. This intelligently accommodates thermal expansion and contraction, completely eliminating the common problem of tube sheet cracking found in traditional boilers.
• 3. Optimized Water Circulation: A rational water circulation circuit, combined with a unique return water injection device (for hot water models), significantly increases the upward flow velocity in the riser tubes. This prevents steam blockage and protects the water wall from burnout, ensuring safe and stable operation.
• 4. Integrated Emissions Control: The furnace is engineered for in-situ inertial separation of dust and particles from the flue gas. Complemented by high-efficiency multi-cyclone or water-film dust collectors, the boiler's particulate emission concentration meets the strictest regional environmental standards.
• 5. Advanced Combustion Technology: A specially designed furnace arch provides energy-saving, high-radiation heat transfer. This, along with secondary air injection technology, guarantees stable and complete combustion of a wide range of biomass fuels, maximizing energy release.
• 6. High-Level Automation and Reliability: The boiler system is equipped with high-standard, premium auxiliary equipment, accessories, and an automatic control system. This ensures safe and stable operation while significantly reducing the labor intensity for the boiler operator.
• 7. Compact and Versatile Design: With a wide capacity range from 1 to 20 t/h (0.7-14MW), the boiler features a compact, shop-assembled structure that allows for a single-level layout, saving valuable floor space and simplifying installation.

DZL Series Biomass Steam Boiler Technical Specifications