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Gas/Oil-fired Thermal Oil Heater VS Steam Boiler

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Gas/oil-fired thermal oil heaters and steam boilers are industrial boilers. However, their respective systems, uses, characteristics and advantages are different. Today, we’d like to take ZOZEN gas/oil-fired thermal oil heater and steam boiler as example, and briefly describe the differences between the two types of boilers.

What is a thermal oil heater?

Thermal oil heater refers to a boiler heated by heat transfer oil. The principle of the thermal oil heater is to use the hot oil circulating oil pump to circulate the liquid phase, and then transfer the heat energy to the heating equipment and return to the heating furnace for reheating.

YQ(Y)L series
thermal oil heater

Capacity: 7000-29000 KW
Pressure: 0.8-1Mpa

YQ(Y)W series
thermal oil heater

Capacity: 1400-14000KW
Pressure: 0.8-1Mpa

What is a steam boiler?

Steam boiler refers to the boiler equipment that produces steam. The principle of steam boiler is that heats water to certain parameters and produces high-temperature steam. Water is heated in the drum to become steam, and fire gives off heat in the furnace. Usually "t/h" (ton/hour) is used to express the capacity of the boiler.

WNS series steam boiler

Capacity: 1-20t/h
Pressure: 0.7-2Mpa

SZS series steam boiler

Capacity: 20-110t/h
Pressure: 1.25-5.3Mpa

Parameter table of ZOZEN gas/oil-fired thermal oil heater and steam boiler

     
Thermal Oil Heater
Steam Boiler
Thermal efficiency
95%
98%
Pressure range
0.8-1Mpa
0.7-5.3Mpa
Working temperature
320°C
194-540°C
Capacity
1400-29000KW
1-110 t/h
Applicable fuel
Natural gas, coke oven gas, methane, diesel, light oil, heavy oil, etc.
Delivery mode
Packaged mode
Packaged mode: 1-35t/h
Shop assembly: 40-55t/h
Field assembly: Above 55t/h
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Differences between gas/oil-fired thermal oil heater and steam boiler

VS
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Gas/oil-fired thermal oil heater
  • The heat-transfer medium is heat medium oil
  • No direct correlation between temperature and pressure
  • Large heat capacity, accurate temperature control
  • Auxiliaries: feedoil pump, circulation pump, expansion tank, induced draft fan etc.
  • Indirect heat supply in the pipe
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Gas/oil-fired steam boiler
  • The heat-transfer medium is water
  • The higher the temperature, the higher the working pressure
  • The temperature adjustment changes greatly, it is impossible to adjust the temperature accurately
  • Auxiliaries: water treatment system, deaerator, discharge pipe etc.
  • Steam can provide direct and indirect heat supply

Conclusion

The final choice of the boiler should be based on the actual working conditions and temperature requirements of enterprises. If the required temperature of medium is lower than 180 °C, it is recommended to use steam boiler. Otherwise, thermal oil heater is recommended. If the working temperature range varies greatly, the combination of the thermal oil heater and steam boiler is recommended.