​DHL / QXL Series Packaged Coal-Fired Hot Water Boiler

DHL / QXL Series Packaged Coal-Fired Hot Water Boiler

The DHL and QXL series represent a state-of-the-art line of packaged coal-fired hot water boilers, engineered for high efficiency and reliability. These units feature a single-drum, longitudinal water-tube configuration, making them an ideal solution for large-scale industrial processes and centralized district heating systems. The boiler is constructed from high-quality components including the boiler drum, water-cooled walls, convection tube banks, a steel tube economizer, and a tube-type air preheater, ensuring optimal performance and longevity.

Advanced Design and Key Features

The innovative design of the DHL/QXL series incorporates several advanced features to maximize efficiency and operational flexibility:

• Fully Water-Cooled Furnace: The furnace is composed of a membrane water-cooled wall, with both the front and rear arches also featuring a water-cooled structure. This design significantly enhances heat absorption and improves combustion efficiency.
• High-Performance Chain Grate Stoker: The combustion system utilizes a flaker-type, non-leaking chain grate stoker driven by a stepless speed-regulating gearbox. This allows for precise control over the combustion process, accommodating a wide variety of coal types and ensuring complete fuel burnout.
• Optimized Heat Exchange: Flue gas passes through a horizontal flue duct containing the convection tube bank, followed by a rear-mounted steel tube economizer and air preheater. This multi-stage heat recovery process maximizes thermal efficiency and reduces exhaust gas temperature.
• High Efficiency and Fuel Flexibility: DHL and QXL series boilers are characterized by their high capacity, excellent thermal efficiency, strong adaptability to different coal types, and safe, reliable operation. The design also promotes effective in-furnace desulfurization and dust removal.
• Packaged Delivery: The boiler is shipped in packaged modules for fast and convenient on-site assembly, reducing installation time and costs.

Product Application Scope

This series of boilers is extensively used in centralized heating applications. With a heating capacity ranging from 29 to 116 MW and pressure from 1.25 to 1.6 Mpa, they are perfectly suited for urban district heating networks, large industrial facilities, and other applications requiring a stable and powerful source of hot water.

Main Technical Specifications

Note: The "Product Performance Technical Parameters" are subject to change. Please refer to the final factory technical documentation for the most current specifications.