Thermal power: 14-70MW
Working pressure: 1.0-1.6MPA
Imported and output water temperature: 150/130/190/70℃
Applicable Fuel: Bituminous Coal, Anthracite, Lean Coal, Biomass
Applicable industry: Centralized heating


DZL new water-fired boiler hot water boiler is a new-generation boiler jointly developed by Zozen Boiler and Beijing Light Boiler Research Institute. It has enhanced combustion, enhanced heat transfer, safe and reliable water circulation, sufficient output, high efficiency, and constant output and efficiency.

Technical advantages:

Full and constant output:

The boiler adopts high-efficiency heat-transfer threaded smoke pipes, ensures the thread depth strictly. The smoke speed is selected reasonably. When the boiler performs normally in the long-term, there is no ash deposition in the threaded smoke pipes. Therefore, the boiler output and thermal efficiency do not decrease with the long-time operation time.

Small size and low investment:

Because using high-efficiency heat-transfer threaded pipes to remove the heat-receiving surface of the tail, the length of boiler is significantly reduced compared to other types of boilers at the same tonnage, and the boiler height is significantly lower, the overall dimensions is minimum, which reduce 30% investment.

No need to special power-off protection:

Due to adopts mixed circulation and large water capacity, when a sudden power failure occurs, there is no need to take special protective measures to prevent the heating surface and the medium of boiler from being damaged which result from vaporization.

Guarantee safety and reliability:

By adopting the structure of the unstretched convex tube plate and the threaded smoke pipe, the thermal stress in the smoke pipe area of the pipe plate is significantly reduced; the water injection and ejection technology of the lower header box makes it impossible for the water wall and the high temperature tube plate to burst and crack.




DZL14-1.0/115/70-A DZL21-1.0/115/70-A DZL29-1.0/115/70-A DZL46-1.25/130/70-A DZL58-1.25/130/70-A DZL70-1.6/150/90-A

Rated thermal power

14 21 29 46 58 70

Rated working pressure

1.0 1.0 1.0 1.25 1.25 1.6

Rated output water temperature

115 115 115 130 130 150

Rated imported water temperature

70 70 70 70 70 90


Heating area


Boiler Proper

473.9 878 1006.6 1396 2103 2713

Effective area of great

21 27 36 58 77 89

Available Fuel


Designed coal

Ⅱ类烟煤 Ⅱ类烟煤 Ⅱ类烟煤 Ⅱ类烟煤 Ⅱ类烟煤 Ⅱ类烟煤

Low heating value

17700 17700 17700 17700 17700 17700

The company’s strength

The company has advanced production processing equipment and complete testing method. the main processing equipment are serpent tube line, CNC coiler production line, membrane wall line, vertical & circle welding line, steel frame automatic welding line, digital control plasma(flame)cutting machine, CNC drum drilling, high-speed CNC flat surface drilling, high-speed header digital control drilling, 100mm three roller CNC universal binder, intersecting lines digital control cutting, CNC, robot welding equipment, 168 CNC three-dimensional bending equipment, 4 axis NC tube bending machine, 3D laser cutting machine, pipe end forming equipment, 100T universal material testing machine, metallurgical microscope, x-ray detector, hardness tester, spectrum analyzer, large scale heat treatment furnace, sand blasting and painting etc.

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