DZL series coal-fired steam boiler

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Our coal-fired chain grate boilers and coal-fired fluidized bed boilers mainly produce hot water, saturated steam or superheated steam for industrial use. Coal-fired boilers have lower operating costs – nearly 50% lower than boilers using oil or natural gas.

Address: No. 76, Xin Da Road, Zhou tie Town, Yixing, Wuxi, China
E-mail: [email protected]
Phone: +86-13506151331

 

Introduction

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.

Benefits

Benefits
  • Compact structure, compared with same type boiler, the boiler with small size, will save the boiler investment of capital construction.
  • The boiler barrel is consisted of arched tube plate and thread smoke tube, it makes the boiler Quasi steel body into quasi-elastic body structure. It cancel brace part of the tube plate, reduce the stress .Tube plate’s smoke tube change from double return into single return. It solves problem of the tube plate crack .
  • The bottom of the boiler barrel layout with bank of tubes. It will avoid the dead water region in the bottom of the boiler barrel, then sludge is hard to deposit. Boiler barrel can get good cooling, it avoid the bottom of the pot shell burnt or bulge effectively.
  • Stable operation, convenient adjustment, supply strong power .
  • It takes the thread smoke tube to enhance heat transfer, improve the heat transfer coefficient and thermal efficiency. Due to disturbance of smoke in the tube, the smoke pipe is not easy to accumulate dust ,it can clean by itself .
  • The boiler can remove the dust automatically, to ensure the smoke dust to reach the ruled norm of the environment protection.

Construction

Construction
  • 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.

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