SZL boiler adopts two drums, and the steam capacity is bigger than DZL boiler, whose steam capacity is available from 4t/h to 20t/h, and fuel is available to shaped solid material. As main heating area of boiler, the water wall adopts membrane water wall structure and shapes arch structure, which structure not only strengthens boiler seal performance, but also increases furnace volume and heating area, at same time, it reinforces the back arch intensity. During the whole burning system, the flue gas goes through furnace, combustion chamber, convection bank, economizer into smoke channel on boiler back, and then emissions into the atmosphere after dust collector, induced draft fan, chimney, ensuring the quality of the flue gas to meet national environment requirement. Secondary air is set on font wall and controlled by valve in order to make biomass fuel burning fully, and the feeding hole material is used high quality to meet biomass fuel requirement.
Back arch is low and long, and the exit section is inverted, and the front arch angle is 45°, echoing back arch to form obvious "alpha" shape flame, contributing to fuel burning fully.
2. Advanced membrane wall structure
Membrane wall structure is widely used in power station boiler, using this structure in biomass package boiler brings boiler many features, such as heat transfer coefficient increases, heat transfer effect increases, heat loss is lower, air tightness is better, furnace wall not deformed, no leaking ash, easy maintain, etc.
3. Efficient slag technology
Our DZL and SZL series steam boiler adopts new type small flake type grate and adds insurance ring, which overcomes the technical problem of grate falling off, and reduces the exhaust air in the grate effectively, at same time, which makes the grate operation stable and reliable as well as greatly improves the efficiency of combustion.
4. Reasonable grate seal structure
For the boiler with capacity below 40t/h, we adopts the side seal cold plus Angle plate structure. While for boiler with capacity above 6t/h, we adopts touch type side seal and down seal structure.
| Model | Rated thermal power (MW) | Rated steam pressure (MPa) | Outlet water temp. (℃) | Return water temp. (℃) | Design fuel |
| DZL1.4-1.0/95/70 | 1.4 | 1 | 95 | 70 | Biomass fuel with solid shaped material |
| SZL2.8-1.0/95/70 | 2.8 | 1 | 95 | 70 | |
| SZL4.2-1.0/95/70 | 4.2 | 1 | 95 | 70 | |
| SZL10.5-1.25/115/70 | 10.5 | 1.25 | 115 | 70 | |
| SZL14-1.0/95/70 | 14 | 1 | 92 | 70 |