DZL series package boilers are horizontal three-pass water & fire tube boilers with a chain grate stoker structure. Threaded pyrotechnic tubes are arranged in the drum to form a convection heating surface, while the drum and the water walls on both sides form a radiation heating surface in the furnace. Each package system is fully installed and wired before being transported to site and is electrically controlled to provide functions such as stepless speed regulation for the stoker, threshold parameter alert and interlock protection.
Heating, hotels, schools, hospitals
The key processing technologies such as steel plate blanking, circling, drum and tube plate drilling adopt advanced CNC machining to reduce the assembly stress and prolong the service life of the boiler.
Steel tube cutting, thread tube pressing and convection tube processing all adopt advanced CNC technology.
Arched tube sheets and threaded fire tube was first adopted in China to increase heat transfer and completely solve the problem of cracking of the back tube sheet.
Chain grate plate and back smoke chamber plate is cut by CNC plasma cutting machine, which looks neat and beautiful.
Advanced manufacturing technology, using assembly line automatic spinning manufacturing. Enhance heat transfer and raise boiler thermal efficiency. Threaded smoke tubes are highly efficient heat transfer elements which is from many years research of our company. After continuous optimization, the heat transfer coefficient is 1.8 times higher than normal smoke tubes.
Disturbed flue gas to ensure complete combustion of volatile matters. The air volume takes about 30% of the total amount, and the wind speed is 50m³. The independent secondary fan makes it easy to control and adjust the wind volume and pressure. The high-temperature smoke generated by the combustion first enters the horoscope flue on both sides of the body from the tail (in this case, the boiler is water tube type), and the flue gas flows outside the tube. The flue gas cooled by the horoscope flue enters the threaded tube (in this case the boiler is fire tube type) arranged in the drum from the front smoke chamber. The flue gas will be exhausted from the back smoke chamber, this design fundamentally solves the problem of cracking of the tube sheet of a simple fire tube boiler.
Light Weight and Compact Structure. It weights 10 to 20 ton, and low freight charge; small volume, compact structure.