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DZL Coal Fired Chain Grate Boiler

Capacity : 2~15t/h

Pressure : 0.7~2.5Mpa

Fuel : Coal

Application : Chemical industry, textile plant, rice mill, garment factory, livestock, farm, hotel, school, etc.

Brief Intro : DZL coal fired chain grate boiler realizes almost zero pollution with special dust collector solution, has the advantages of compact structure, high thermal efficiency, sufficient output, and avoid tube plate cracking, etc.

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>> Introduction
DZL series coal-fired horizontal three-pass water+fire tube chain grate boiler is a packaged boiler. The boiler body is single-drum longitudinal arrangement. The threaded tube is inside the drum forms convection heating surface. The drum and both sides water-cooling wall form to radiation heating surface. The combustion equipment uses light chain grate.
>> Features
Avoid tube plate cracking

1. Avoid tube plate cracking

The design of the two-wing flue makes the flue gas smoothly enter the front smoke box, ensure the same even temperature of the front tube sheet, avoid the tube plate crack due to temperature stress.

2. Spirally corrugated tube

The single-pass threaded tube inside the drum enhanced the heat transfer performance. Threaded tubes also have the function of self-cleaning, to avoid the ash accumulation in the tube.
Avoid tube plate cracking
Both sides air inlets

3. Both sides air inlets

The boiler adopts double-side air inlet & independent air chamber structure, which can flexibly adjust the air volume and wind pressure of each air chamber to ensure the combustion performance.

4. Remote monitoring

Advanced control system--remote monitoring, if there is any abnormality during the operation of the boiler, providing the first time guidance to reduce the failure rate and loss.
Remote monitoring

>> Parameter

Steam Boiler


Rated Steam

Capacity (t/h)

Rated Steam 

Pressure (MPa)

Rated Steam 

Temperature (℃)

Coal Consumption 


Thermal Efficiency 


Overall Dimension




DZL2-0.7/1.0/1.25- AII/T 2 0.7/1.0/1.25 170/184/194 135 82 5.5×2.3×3.3 23
DZL6-1.25/1.6- AII/T 6 1.25/1.6 194/204 810 82 7.5×2.9×3.8 35
DZL8-1.25/1.6- AII/T 8 1.25/1.6 194/204 1150 82 8.1×3.1×3.8 45
DZL10-1.25/1.6- AII/T 10 1.25/1.6 194/204 1350 82 Up 7.7×3.2×3.6 Down 8.6×3×2.6 61
DZL15-1.6/2.5- AII/T 15 1.6/2.5 204/226 2200 83 Up 1.0×3.24×3.54 Down 12×3.2×3.08 77
DZL20-1.25/1.6- AII/T 20 1.6/2.5 204/226 3160 83 Up 11×3.24×3.54 Down 14×3.2×3.08 78

Note: 1. Parameter is for reference only, if any changes should follow the factory technical data. 

 2. Available fuel: coal, lower heating value: Q≈21,000 KJ/Kg

Hot water boiler


Rated power


Rated pressure 


Supply water


Return water temperature


Fuel consumption 


Thermal Efficiency 


Overall Dimension




DZL0.7-0.7/95/70 0.7 1.0 95 70 151 82 5.1x2.2x3 17
DZL1.4-0.7/95/70 1.4 1.0 95 70 302 82 5.5x2.3x3.3 23
DZL2.8-0.7/95/70 2.8 1.0 95 70 600 82 6.6x2.6x3.6 25
DZL4.2-1.0/95/70 4.2 0.7 95 70 880 82 7.5x2.9x3.8 35
DZL5.6-1.25/95/70 5.6 0.7 95 70 1150 82 8.1x3.1x3.8 45

Note: 1. Parameter is for reference only, if any changes should follow the factory technical data. 

 2. Available fuel: coal, lower heating value: Q≈21,000 KJ/Kg

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    0.7-14 MW
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    21.1-29 MW
    29.1-75 MW
    1-10 t/h
    11-20 t/h
    21-90 t/h
    91-140 t/h

    Sitong Boiler Co., Ltd is the professional manufacturer of Grade A industrial boilers, engages in industrial boiler design, manufacturing, transportation, installation, and after-sale service.

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