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Double Drum Water Tube Coal Fired Hot Water Boiler

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Water tube boilers are designed for larger, high-pressure, and superheated steam applications. SZL series coal fired chain grate boiler is a good example
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Technical Parameter
Water tube boilers are designed for larger, high-pressure, and superheated steam applications. SZL series coal fired chain grate boiler is a good example. Membrane water cooling wall structure in combustion chamber, good sealing to prevent heat loss. It is widely used in textile factory, paper factory, food industry, generating steam in industry process.
This product is horizontal double drum longitudinal water tube boiler, furnace side with closely packed waterwall tubes, the back furnished with two sets of convection tubes. The whole boiler divided into the up and down two large factory, and after the boiler in position , masonry the fire grate and the lower furnace wall. Balance of ventilation combustion  between the chain grate and the machine. Small stoker labor intensity. Using a unique thermal and turbulent combustion and gasification technology in the design of the furnace structure, no boiler smoke outlet. Furnace with a centrifuge, gravity separation, coupled with the separation of flue dust, a smaller smoke and dust emissions

1 Dividing into up and down two-body assembly, small investment, fast installation. Single layer arrangement, less space.                                                
2 Full water structure, fast heat transfer, high thermal efficiency.                                             
3 Chain grate,zoned-air distribution, covered with a large furnace arch , fast burning speed, wide fuel adaptability.                                            
4 Furnace arch design adopts momentum method, the furnace flue gas form a strong turbulent mixing at high temperatures, to combustion abundantly, the combustion efficiency up to 95%. Soot emissions significantly lower than the national standard,  and meet the Class I district environmental requirements                                                
5 Fire grate infinitely variable speeds, flexible adjustment on combustion.                                              
6 Elegant and nice appearance.                                             
7 Pairs of drum full pipe structure, maturity structure: the inspection and maintenance easy and short repair time.                                             
8 Mechanization, high degree of automation.                                              
9 Change based on fuel characteristics and modify furnace arch structure, to achieve the best status.                                           
Parameters / Units Model SZL4.2-1.0/115/70 SZL5.6-1.0/115/70 SZL7-1.0/115/70 SZL10.57-1.0/115/70 SZL14-1.0/115/70
Rated Thermal Power MW 4.2 5.6 7.0 10.57 14
Rated Water Out Pressure Mpa 1.0
Out/ Return Water Temperature 115/70
Boiler Thermal Effieciency % 80 80 83 83 85
Heating Area Boiler Body m2 139.2 196.7 233.6 350.6 638.1
Coal Economizer m2 130.8 157 174 261 295
(cast iron)
Fire Grate Active Area m2 7.78 10.04 11.8 17.25 20.8
Applicable Coal Type   All (Qnet.ar)≥17693kj/kg)
Coal Consumption Kg/h 960 1260 1540 2180 3080
Discharge Smole Temperature 180 180 170 160 160
Max. Transportation Volume t ~22 〜25 〜28 〜31 〜35
Dimension(l*w*h) m 8.0*3.6*6.15 8.3*4.0*6.15 9.38*4 0*6.2 13.0*5.6*6.7 14.0*5.6*6.7
Max. Transportation Boiler Body mm 8000*2800*3600 8100*3000*3600 8900*3050*3600 11910*3240*3600 13000 * 3440* 3800
Max. TransportationDimension(l*w Foundation mm 6998*2800*2000 8034*2800*2000 8640*3100*2000 10340*3300*2000 11840*3600*2275
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