DZL series package boilers are horizontal three-pass water & fire tube boilers with a chain grate stoker structure. Threaded pyrotechnic tubes are arranged in the drum to form a convection heating surface, while the drum and the water walls on both sides form a radiation heating surface in the furnace. Each package system is fully installed and wired before being transported to site and is electrically controlled to provide functions such as stepless speed regulation for the stoker, threshold parameter alert and interlock protection.
The vertical and circumferential seam welding of the boiler adopts advanced automatic submerged arc welding technology to ensure the welding quality. All vertical and circumferential welds will go through 100% ray detection.
The welding of smoke tube and the tube plate adopts pre-expansion to eliminate the gap between the tube and tube plate, then be welded by automatic argon arc welding, which effectively eliminate stress and prolong boiler life.
The chain grate is manufactured by our factory, and it is tested for 72 hours before leaving the factory to ensure that the tightness is moderate and won’t deviate.
Advanced manufacturing technology, using assembly line automatic spinning manufacturing.
Enhance heat transfer and raise boiler thermal efficiency.
Disturbed flue gas to ensure complete combustion of volatile matters.
The air volume takes about 30% of the total amount, and the wind speed is 50m³.
The independent secondary fan makes it easy to control and adjust the wind volume and pressure.
Feeder: Feeding fuel equally to avoid flashback.
Gearbox: Designing reasonable rotating speed according to the combustion speed to make sure the fuel burning completely.
| Model | Rated thermal power（t/h/MW） | Working pressure（MPa） | Rated output water temperature（℃） | Return water temperature（℃） |
| DZL1.4-0.7/95-70-AⅡ | 1.4 | 0.7 | 95 | 70 |
| DZL2.8-0.7/95/70-AⅡ | 2.8 | 0.7 | 95 | 70 |
| DZL4.2-1.0/115/70-AⅡ | 4.2 | 1 | 115 | 70 |
| DZL7-1.0/115/70-AⅡ | 7 | 1 | 115 | 70 |
| DZL10.5-1.0/115/70-AⅡ | 10.5 | 1 | 115 | 70 |
| DZL14-1.0/115/70-AⅡ | 14 | 1 | 115 | 70 |
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