DZL Partial Drum Quick Loading Coal-fired Steam Chain Grate Boiler

Rated capacity：1~4 t/h

Rated work pressure：0.98~1.57Mpa

Adaptive fuel：Ⅱ.Ⅲ Bituminous coal

Application industry : industrial and mining enterprises, schools, hospitals, etc.

Main technical parameters of DZL Eccentric-drum packaged boiler

1.Structure introduction :

The drum of this type is laid longitudinally(deflect to one sude).lt has natural ciculation, water-fire tubes, flue-gas three return. Convection bank of tubes are laid in the second return,and furnace flues are laid in the third return,which solves the problem that the bottom of the drum is easy to bulge and the rear tube plate is easy to crack during the use of the main drum boiler.

2.Product features :

a.Because the center line of the drum is offset from the center line of the grate, the high temperature flame does not directly burn the bottom of the drum, which avoids the disadvantage of bulging at the bottom of the drum due to high temperature creep.

b. This product shrunk the fire pipe, increased the water pipe. The second return of the flue gas is changed from the fire tube of the traditional main drum to the 5-7 drainage tube on the left side of the boiler. The high temperature flue gas above 800 °C no longer directly scours the boiler tube plate, so that the flue gas temperature entering the third return fire tube is only about 600 °C, which completely avoids the crack of the main drum tube plate.

The above two points not only ensure the reliability of boiler operation, reduce the cost of boiler maintenance, but also ensure the user 's requirements for continuous safe and efficient operation of the boiler.                                                                                                                                       c. Chain grate adopts an independent sealed air chamber, the air chamber is equal pressure unilateral air inlet, the uniformity of the width direction and the adjustability of the length direction of the grate are better, which can better meet the needs of combustion, while the general boiler manufacturers use the warehouse air and the butterfly air regulating plate with two holes on the side plate of the grate

d. The two sides of the main combustion zone of the grate are sealed by high temperature resistant ductile iron, while the general manufacturers use gray cast iron or ordinary heat resistant cast iron.

e. Saw-tooth cast iron coal gate is used in coal gate. It not only loosens the coal seam, but also increases the surface area of coal seam combustion, and correspondingly increases the combustion area of grate. Practice has proved that the use of this kind of coal gate can make the coal fully burned, the burnout zone of coal is obviously advanced by about 500 mm, the carbon content of slag is greatly reduced, and the thermal efficiency of boiler is improved.

f. This series of boiler heating surface layout is more abundant, coupled with the combustion condition is better, so the boiler output, high thermal efficiency, to ensure that with 10 % -20 % overload capacity.

In summary, our company 's eccentric-drum packaged boiler has distinctive characteristics. The boiler is widely welcomed by Southeast Asian and domestic customers because of its sufficient output, high thermal efficiency and good safety.

This series of eccentric-drum packaged boiler is the first batch of energy-saving products promoted by the company. It won the title of ' Golden Dragon Award ', ' Provincial Excellent ' and ' Ministry Excellent ' of the new products of the National Economic Commission.