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DZL series coal-fired boiler

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.

1 . 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.

2 . Steel tube cutting, thread tube pressing and convection tube processing all adopt advanced CNC technology.

3 . 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.

4 . Feeder: Feeding fuel equally to avoid flashback.

Technical advantages

5 . The vertical and circumferential seam welding of the boiler adopts advanced automatic submerged arc welding technology to ensure the welding quality. All vertical and circumferential welds will go through 100% ray detection.

6 . The chain grate is manufactured by our factory, and it is tested for 72 hours before leaving the factory to ensure that the tightness is moderate and won’t deviate.

7 . Advanced manufacturing technology, using assembly line automatic spinning manufacturing.

8 . Disturbed flue gas to ensure complete combustion of volatile matters.

Product parameters

ModelRated thermal power(t/h/MW)Rated working pressure(MPa)Steam temperature/Rated output water temperature(℃)Thermal efficiency(%)
DZL1-0.7-M1/0.70.717079
DZL1-1.0-M1/0.71.018479
DZL2-1.0-M2/1.41.018479
DZL2-1.25-M2/1.41.2519479
DZL2-1.57-M2/1.41.5720479
DZL2-2.45-M2/1.42.4522579
DZL4-1.25-M4/2.81.25194
79
DZL4-1.57-M4/2.81.5720479
DZL4-2.45-M4/2.82.4522579
DZL6-1.25-M6/4.21.2519479
DZL6-1.60-M6/4.21.620479

Technology Center

Our products have been sold to more than 100 countries and regions and set up offices in many countries to ensure that they serve customers at the first time.

ZOZEN boiler covers an area of 150 thousand square meters, with an annual production capacity of 2000 industrial boilers and 25000 tons of steam.

ZOZEN is an AQSIQ approved boiler and pressure vessel manufacturer. We hold the ASME "S" and "U" Certificates and have earned ISO9001:2000 Certification.