SZL series boiler is the horizontal dual cylinder arranged, chain grating, pipe steam and hot water boiler designed by our technical personnel according to advanced technology and experiences from home and abroad. The technology performance and environmental protective index of this series of products reach the international advanced level, and this product is the mainstay one in boiler industry.

The boiler uses quick fitting or assembly structure. The 4-6th boiler is of quick fitting pipe structure, exit shop after completely assembled, the boiler of 6-35t/h is composed of 2 main components: The upper assembled components is the body heat accepting part, and the lower assembled component is of combustion equipment. The former part of the boiler body is arranged an water cooling wall, the upper part of it is connected to boiler cylinder, and its lower part is connected to collective chest, so as to form a combustion room and absorb the radiated heat from the furnace; its rear part is arranged with dense convection pipe bundle between upper and lower boiler cylinders;the high temperature smog after combustion shall be stand for twice returning to coal saver singly arranged ,and flow into duster and exhausted from chimney in the end. The 20t/h assembled water pipe boiler is composed of front furnace, rear furnace,convection pipe bundle, coal saver and chain grating,and which are assembled in big components respectively for delivery.

This series of boiler absorbs the merits from quick fitting boiler, features compact in structure, the boiler’s shop is of one storey arranged, convenient for site installation, short in construction period, cheap in cost, simple in operation and etc.


Overhaul platform

  • Overhaul platform is safe and reliable,arranged reasonably and overhauled conveniently
  • Platform ladder will be fixed by bolt and nut
  • Safe and convenient and primer will not be damaged

Chain grate

  • Chain grate layer burning,scientific furnace widely applied type of coal, reasonable air distribution,full combustion.


  • Cold rolling pressed film forms concave-convex panel which has great rigidity and strength and is beautiful
  • Fixed by self-tapping screw and there is no welding spot
  • After rust removed,the surface will be printed corrosion prevention and finishing coat and primer.It’s beautiful
Industry application
This series of steam boiler is suitable for insustrial and living steam consumption, the correspondent capacity hot water boiler is applied for industrial and civil heating purpose.


Specification SZL4-1.25-AII























Rated evaporation capacity(supply heat) 4/2.8 6/4.2 8/5.6 10/7.0 15/10.5
Rated pressure 1.25/1.6/2.45/0.7 1.25/1.6/2.45/1.0 1.25/1.6/2.45/1.0/1.25 1.25/1.6/2.45/1.0/1.25 1.25/1.6/2.45/1.0/1.25
Rated Steam temperature /Output water  temperature 194/204/225/95 194/204/225/115 194/204/225/115/130 194/204/225/115/130 194/204/225/115/130
Water supply temperature( return water temperature) 20/70 20/70 20/70 20/70 20/70
Heating area proper Radiation 21 22.6 26.1 29.5 34.8
Convection 78.5 116.6 184 204.1 283.7
Economizer 38.5 130.8 130.8 174.4 348.8(汽)/261.6(水)
Effective area of great 5.3 7.8 10.2 12 18
Fuel available AIIcoal
Fuel consumption 591 880 1155 1443 2157
Thermal efficiency 81 81 81.3 82 82
Weight of bigest part for transportation 32 21 25 28 30
Overall dimension of boiler assembled 7.4×2.7×5.3 7.0×2.7×3.5 6.9×3.2×5.3 7.9×3.3×3.5 10×3.2×3.5
Overall dimension of boiler assembled 7.5×3.5×4.4 8.0×3.6×6.2 8.4×4×6.2 9.4×4×6.2 13×5.6×6.7

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.

SHX sries circulating fluidized bed steam boiler

Read More

DHL Coal-Fired Steam Boiler

Read More

DZL New Water-fire Pipe Hot Water Boilers

Read More

DHX Circulating Fluidized Bed Hot Water Boilers

Read More

DHX Circulating Fluidized Bed Hot Water Boilers

Read More

4.2MW SZL Coal Fired Hot Water Boiler

Read More

25-ton SZL coal-fired steam boiler project

Read More

Heilongjiang Kangtai Industry

Read More

10 ton SZL coal-fired steam boiler

Read More

Taoshan Forestry Bureau, Heilongjiang Province

Read More