SZL series coal-fired hot water boiler

Advanced welding process

The welding of important parts like the vertical and circular seams of the boiler, the tubes, the inside of boiler and the flange are all adopted automated welding processes such as submerged arc welding or gas shielded welding to ensure the welding quality. All the vertical and circular seams will be done 100% radiographic inspection.

Tube flange weld adopts robot welding.

The chain grate panel, front and rear smoke chamber panel adopts CNC plasma cutting machine to cut orderly and beautifully.

Unique structural design

According to different capacity, different numbers of independent air bins are arranged from front to back of the grate.

The user can reasonably adjust the air distribution according to different combustion conditions to ensure that the fuel is fully burnt.

Secondary air is input to disturb fuel gas in the furnace, to ensure the fuel is burnt totally. The independent secondary fan makes it easy to control and adjust the air volume and air pressure.

Feeds evenly feeding and avoid flashback.

Low NOx emissions

Graded air supply and special furnace arch structure decrease the NOx emissions to 100mg/m³.

Different biomass raw materials are analyzed by numerical simulations, thermal efficiency is more than 90%.