A fire tube boiler is a type of boiler in which hot gases pass from a fire through one or more tubes running through a sealed container of water. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam.
ZOZEN’s fire tube boilers can be mainly divided into two types: WNS series gas-fired (oil-fired) boilers and DZL series coal-fired (biomass-fired) boilers, which have been exported to Indonesia, Pakistan, Philippines, Malaysia, Vietnam, Russia, Thailand, Australia, Algeria, Outer Mongolia, Papua New Guinea, Bangladesh, Nigeria, Colombia, Tanzania, Mauritius, Madagascar, India, Oman, Laos, Saudi Arabia, Singapore, South Africa and many other countries. ZOZEN’s boilers are used for application in chemical, pharmaceutical, paper, textile, food, electronics, automobile manufacturing and many other industries.
If you have any questions, please e-mail us at info@zozen.com or call us at 400-161-0099. Our professional team will provide you with tailor-made system solutions.
WNS series gas-fired (oil-fired) boilers are wetback fire tube boilers with a two-pass or three-pass design. Threaded flue tubes are used for heat transfer and condensator & economizer are added to decrease the exhaust gas temperature to 60℃, which manage to achieve a thermal efficiency up to 98%. The condensator & economizer are installed at the top, giving the boiler a compact size.
1. Adaptability to a wide range of fuels including natural gas, methane, coal gas, 0# diesel, heavy oil, etc.;
2. This kind of boiler adopts whole corrugated furnace for fuels to be fully burned;
3. It uses threaded flue tube for heat transfer, managing to achieve a thermal efficiency up to 98%;
4. Safety is assured by advanced control systems. Full automation enables unattended operation;
5. Use ultra-low nitrogen burner for low emission and environmental protection;
6. Package design helps save time, space, and installed cost.
Steam boilers：
Capacity: 1 tph - 20 tph
Pressure: 0.7-2.5MPa
Hot water boilers：
Capacity: 0.7MW - 14 MW
Pressure: 0.7-1.25MPa
DZL series package boilers are 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. Wide adaptability to a range of fuels including biomass particles, wood chips, corncobs, bits of wood, bituminous coal, lean coal and anthracite, etc.;
2. Chain grate produced by ZOZEN features layer burning for fuels to be fully burned;
3. Threaded flue tubes are used for heat transfer, managing to achieve a thermal efficiency up to 80%;
4. The boilers are designed to have compact structure, small volume, and convenient installation, which make them cheaper in fundamental construction;
5. High level of automation is for easy operation. Safety is assured by the advanced control system.
Steam boilers：
Capacity: 2 tph - 10 tph
Pressure: 0.7-2.5MPa
Hot water boilers：
Capacity: 1.4MW - 14 MW
Pressure: 0.7-1.25MPa
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