DZL series coal-fired hot water boiler

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.


0.35-14 MW


0.7-1.25 MPA


Bituminous Coal,Lean Coal,Anthracite


Heating, Hotels, Schools, Hospitals

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Conducive to low-quality coal combustion

DZL chain grate coal fired boiler design adopts the latest research product, " Second Prize of Advance Awarded by Xi'an Jiaotong University ", the back arch is low and long and the part near the exit is inverse inclined type, while the front arch is 45 inclined type, they together from a downside "α" flame structure, which makes the lean coal combustion easier and it can adjust itself to a wide range of coal types.

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Flexible adjustment, symmetrically distributed wind

Separate adjustable wind chamber under the fire grate is equipped and wind is fed from two sides. It adopts new type crack screw wind adjustment structure so that the wind adjustment and ventilation cross section proportion is 100%. Thus, it is easy to adjust and the wind is distributed symmetrically.

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Avoid bulge defects

New furnace structure, bulge defects caused by the bottom of the drum being heated directly is avoided.

Prevent the grate air leakage

There is push-pull damper dust removal equipment. The damper adopts finish machining cast iron seal structure, so the secondary combustion distortion and air leaking in the grate is effectively prevented.

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