Saudi arabia straw fired hot water 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.
 

Technical advantages
 

CNC manufacturing technology

• 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 welding process

• 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.

• The welding of smoke tube and the tube plate adopts pre-expansion to eliminate the gap between the tube and tube plate, then be welded by automatic argon arc welding, which effectively eliminate stress and prolong boiler life.

• The flange of the socket is welded by robots.

• 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.

Precision parts processing

• 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.

Unique structural design

• 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.
  
  
  
  DZL series biomass-fired packaged boilers are horizontal three-pass water & fire tube boilers with a chain grate stoker structure. The boiler proper is longitudinal arrangement with a single drum, 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.
  
  
  ZOZEN creates value for you
  
  Wide fuel adaptability - Applicable to a wide range of fuels including biomass particles, rice husk, corncob, wood chips, etc.;
  
  Customized solutions save money and time - Save you money and time with custom designed and engineered feeding system, slag discharge system, flue gas treatment system and boiler house layout plans;
  
  Higher thermal efficiency - Thermal efficiency at least 5% higher than normal systems, annual fuel cost savings for each 10 tph boiler as high as $75,000;
  
  High level of automation - easy maintenance, high level of automation that requires less involvement of operational and maintenance personnel;
  
  Advanced control system - Ensure stable operation while saving investment cost for you with a reasonable selection.
  
  
  
  ZOZEN STRENGTH
  Wuxi ZOZEN Boilers Co., Ltd. has been committed to manufacturing, researching and developing industrial boilers since its foundation in 1988. ZOZEN has obtained PRC Grade A Manufacture License of Special Equipment (Boilers), PRC Grade BRII Manufacture License of Special Equipment (Pressure Vessels), ASME "S" (Power Boilers) and "U" (Pressure Vessels) stamps and many other international certificates of authorization. Being the leading manufacturer of industrial boilers in Asia, ZOZEN already has the ability of an annual production scale exceeding 2000 sets; the output value of the last two years both exceeded $1.5 billion, ranking the first in the whole industrial boiler industry. With over 30 years of efforts, ZOZEN high-quality boilers are exported to many countries and regions all over the world and all walks of life including tobacco, rubber, food, paper-making, pharmaceuticals, electronic, heating industry, etc.; they have won the high recognition and evaluation from numerous well-known enterprises.