Company Strength & Qualifications
DHL Series Corner-Tube Steam and Hot Water Boilers
Advanced DHL Series Corner-Tube Steam and Hot Water Boilers
The DHL Series Corner-Tube Boiler represents a new generation of high-efficiency, reliable industrial boilers. This advanced design incorporates a front wall, furnace rear wall, left and right side walls, a convection bank (superheater), and flag-type heating surfaces (evaporator section). The entire furnace is constructed with fully welded membrane water walls, ensuring exceptional sealing and structural integrity. The boiler features a single, horizontally arranged, insulated drum, and its circulation is based on a natural circulation principle.
A key innovation of the DHL boiler is its unique self-supporting structure. The downcomers are ingeniously located at the four corners of the boiler, serving not only as water circulation pipes but also as the main support frame. This eliminates the need for an independent steel support structure. The system is anchored by a fixed support point at the front-right, while the other three points allow for free thermal expansion, ensuring stability and longevity under various operating conditions.
Key Features and Technical Advantages
| Feature | Description & Benefits |
|---|---|
| Self-Supporting Structure | The boiler is supported by its own membrane water walls and corner-tube downcomers, eliminating the need for a separate, heavy steel frame. This provides excellent stability, capable of withstanding seismic events of magnitude 8 or higher. |
| Compact, Modular Design | Utilizing a modular design philosophy with fully welded membrane water walls, flag-type evaporator sections, and serpentine-tube superheaters, the boiler achieves a highly compact structure, saving valuable plant space. |
| Efficient Natural Circulation | Large-diameter downcomers are strategically placed at the front, middle, and rear sections, ensuring a clear and reliable water and steam circulation path without the need for circulation pumps. |
| Superior Sealing & Low Excess Air | The fully sealed membrane wall construction completely prevents air leakage. This allows the excess air coefficient to be controlled as low as 1.5, which reduces energy consumption and significantly lowers NOx emissions for eco-friendly operation. |
| Optimized Combustion | The flue gas path is arranged with finned tube sections and utilizes a forced draft system for scientific air distribution, ensuring complete and efficient fuel combustion. |
| High Thermal Efficiency | Excellent sealing combined with high-performance, lightweight insulation materials minimizes heat dissipation. The outer wall temperature is typically only 15°C to 20°C above the ambient temperature. |
| Space-Saving & Flexible Layout | The boiler's small footprint, light overall weight, and low foundation investment requirements allow for flexible plant layouts, including single-layer or double-layer arrangements. |
| Fast Installation & Automation | The modular design significantly reduces on-site installation work and shortens the project cycle. The boiler is equipped with automated operational controls for convenient and safe operation. |
Ideal Solution for Centralized Heating
Centralized heating is a modern approach to urban energy management, consolidating numerous small, inefficient heat sources into a large, efficient heating station. The advantages are numerous: significant energy savings, drastic reduction in urban pollution, and improved cityscape aesthetics. The DHL Corner-Tube Hot Water Boiler is perfectly aligned with this trend and national policies promoting cleaner energy. Its large capacity and high efficiency make it the premier choice for urban centralized heating projects. Our company has established large-scale, batch production capabilities for these boilers, with capacities available from 14MW to 110MW to meet diverse project needs.
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