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 key processing technologies such as steel plate blanking, circling, drum and tube plate drilling adopt advanced CNC machining to reduce the assembly stress and prolong the service life of the boiler.
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.
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.
| Model | Rated thermal power（MW） | Rated working pressure（MPa） | Rated output water temperature（℃） | Rated imported water temperature（℃） |
| DZL1.4-1.0/115/70-M | 1.4 | 1 | 115 | 70 |
| DZL2.8-1.0/115/70-M | 2.8 | 1 | 115 | 70 |
| DZL4.2-1.0/115/70-M | 4.2 | 1 | 115 | 70 |
| DZL7-1.25/115/70-M | 7 | 1.25 | 115 | 70 |
| DZL14-1.25/115/70-M | 14 | 1.25 | 115 | 70 |
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