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SG series
Fire tube steam boilers

A perfect wet back fire tube boiler for reducing energy consumption. Reliability, an advanced control system, energy efficiency and a low environmental impact are the key attributes that set this product as the market benchmark for the industrial boiler field. SG boilers are suitable for producing saturated and superheated steam and superheated water.

Key features

steam capacity

Steam capacity

2 – 30 t/h

7

Pressure

12 – 25 barg

4

Efficiency

up to 97.5%

5

NOx emissions

80 mg/Nm³
(lower values on request)

Advantages

H2 ready2OK

Reliability and durability due to many design solutions: tubes expanded and welded to the tube-sheets; tube-sheets with ledges to guarantee maximum quality of welding between sheet and tubes; the complete absence of refractory and tightening elements; a large volume of the furnace which reduces the formation of carbon deposits and pollution.

Combustion system suitable for different fuels: natural gas, biogas, GPL, hydrogen, diesel oil.

Simple and quick maintenance due to two-pass design with convenient access to the internal components of the boiler: furnace, inversion chamber, and tube plate.

High thermal efficiency due to efficient heat transfer, big exchange surfaces, and optimized heat recovery systems.

Multifunctional control system and dynamic monitoring of the boiler operation, ensuring optimal performance and safety even in offline mode.

Ability to fully integrate with Smart Factory complexes and other process control systems.

Low NOx emissions of less than 80 mg/m3 and lower emissions available on request according to BAT.

Technology

The SG boiler is a fire tube steam generator, two-pass wet back type with a horizontal design, fully packaged and complete with all the necessary control and safety devices.

SG steam generators have a complete shielding of the inversion chamber with a water tube enclosure. This, compared to other types of boilers, ensures fast access to the flue gas inversion chamber and complete visibility of the tubes, tube sheet, and combustion chamber.

SG series steam generators are manufactured and certified according to the European Directive PED. Other design codes and certifications can be applied, including ASME, SELO, etc., when considering the individual requirements of the customer.

After assembly, the boiler’s internal components are checked through non-destructive testing methods. At the end of the installation, our boilers are extensively fire-tested at our factory.

Compatible products

Burners

Our constant commitment to improve combustion efficiency and reduce pollutants released into the atmosphere has led us to develop high-performance burners that are able to:

  • Reduce NOx and CO2 emissions to handle Flue Gas Recirculating systems
  • Burn standard and special fuels (natural gas, hydrogen, biogas)
  • Ensure high flame stability
  • Guarantee wide turndown ratios

Our burners are designed and manufactured to perfectly combine with our own boilers’ combustion chamber geometry, optimizing thermal load regulation management.

Demineralization plant

Boiler water feeding requires low hardness concentration and conductivity to reduce the blow-down (heat loss). Two different types of treatment can be used: membrane-based technology and ionic-exchange solutions. Dedicated pre-treatments are necessary, based on the available water source.

Condensate treatment

It is necessary to purify the steam condensate from the process, to reduce water consumption and recover the heat contained in the condensate.

Dosing of chemical products

Oxygen scavengers are used as the protective dosage downstream of the thermo-physical degassers and as the alkalizing agents to maintain a high pH inside the boiler. The choice of proper water treatment represents the energy optimization of the steam generator/water treatment package and a source of savings in water extraction and discharge costs.

Deaerators

It is necessary to remove CO2 and O2 to prevent corrosion phenomena. There are two options available: conventional packages composed of a tower and a drum, or the compact “smart” unit where the degassing equipment is realized inside the drum. The performance range is 7-20 ppb, according to the type of the installed unit.

SG Series Fire Tube

Technical Data

SG Series 200 – 1000

SG 200 SG 300 SG 400 SG 500 SG 600 SG 800 SG 1000
Steam capacity [kg/h] 2.000 3.000 4.000 5.000 6.000 8.000 10.000
Design pressure [barg] 12 - 30 12 - 30 12 - 30 12 - 30 12 - 30 12 - 30 12 - 30
Thermal efficiency [%] up to 97,5 up to 97,5 up to 97,5 up to 97,5 up to 97,5 up to 97,5 up to 97,5
Length [mm]
(with burner)
5.700 5.800 6.300 5.850 6.350 8.300 8.700
Width [mm]
(with accessories)
2.700 2.700 2.700 2.900 2.900 3.300 3.500
Height [mm]
(basic version)
2.400 2.400 2.400 2.600 2.600 3.000 3.450

SG Series 1200 – 3000

SG 1200 SG 1500 SG 2000 SG 2200 SG 2500 SG 3000
Steam capacity [kg/h] 12.000 15.000 20.000 22.000 25.000 30.000
Design pressure [barg] 12 - 25 12 - 25 12 - 25 12 - 22 12 - 22 12 - 18
Thermal efficiency [%] up to 97,5 up to 97,5 up to 97,5 up to 97,5 up to 97,5 up to 97,5
Length [mm]
(with burner)
8.950 9.550 10.150 11.100 12.400 12.500
Width [mm]
(with accessories)
3.500 3.900 3.900 4.100 4.100 7.300
Height [mm]
(basic version)
3.450 3.750 3.750 3.990 3.990 5.200