Our Capabilities

Howden supplied some of the world’s first FGD systems in 1934, and since then we have become a leading supplier of gas gas heaters and its application has extended to SCR systems. Our design is ideally suited to the treatment of ‘dirty’ gases with exceptional resistance to the cool, moist acidic conditions associated with such applications, where fouling and corrosion are a constant challenge.

Benefits of Howden Gas Gas Heaters

  • High thermal efficiency maximising recovered energy and cost savings
  • Lower CO2 emissions reducing carbon footprint and related costs
  • Highly flexible design suitable for FGD and SCR applications (including tail-end SCR)
  • Compact design compared to recuperative tubular or plate heat exchangers, lowering cost per footprint and benefitting installation requirements
  • Heat transfer not affected by fouling enabling performance to be maintained even when using 'dirty' fuels
  • Very low rotational speed requiring limited maintenance

Howden GGH

Howden’s Gas Gas Heaters are based on decades of engineering expertise and are designed as custom solutions to match the exact process duty.

The heater can come with bi-sector, tri-sector and quad-sector arrangements according to the process demands and be vertically or horizontally aligned to best fit the site. Each heater is supplied with a central drive system, VN sealing system, advanced cleaning systems and element profiles selected from our wide range to maximise performance.

Download our brochure for more information.

Howden GGH

Enerjet™

The Howden Enerjet™ cleaning system is a method of on-line high-pressure water washing of air preheaters, designed to provide effective and efficient cleaning of severely fouled heat exchanger elements while the air preheater is in normal use.

The Enerjet™ system can be used with any type of gas gas heater from any manufacturer, and works well with most kinds of element profile.

Enerjet

Contact Seals

Flexible contact seals for rotary heat exchangers are a method of minimising the direct leakage gaps between the hot end of the rotor and the sectorplates, which separate the air and gas flows.

Standard seals fail due to constant flexing, therefore Howden carried out an extensive development programme to optimise contact seals for suitable applications providing major leakage reductions. As the seals work best in situations where gaps are small and even, leakage reduction can be enhanced further by combining with parabolic sectorplates.

Download our product leaflet for more information.

Contact Seals

Parabolic Sectorplates

Increased environmental scrutiny and demand for the highest levels of efficiency have driven Howden to develop parabolic sectorplates (patent pending) for use with our heaters.

Hot End Sectorplates are designed with variable stiffness to deform parabolically, when actuated, to match the shape of the deformed operating rotor. This minimises the hot end leakage gap.

Howden parabolic sectorplates not only reduce draft fan power in the plant, but also reduce the gas mass flow to downstream emissions reduction equipment.

Download our product leaflet for more information.

Parabolic Sectorplates

Elements

Our wide range of profiles, enables us to offer the right balance of thermodynamic performance, pressure drop and ease of cleaning for any situation. These profiles can be chosen from our range (which includes the world's first commercially available dual-profile element), or we can match existing profiles that you have already.

We are the world's leader when it comes to producing enamelled elements, which offer a combination of both corrosion protection and good cleanliness when used in rigorous environments.

Elements

Aftermarket

Our service capability encompasses all rotary heat exchangers with our own brands being Howden, Sirocco, Tallares Sanchez Luengo (TSL) and Rothemühle (including LUGAT). We can offer a range of engineering services to assess and implement performance improvements and life extensions.

Aftermarket

Howden GGH

Howden’s Gas Gas Heaters are based on decades of engineering expertise and are designed as custom solutions to match the exact process duty.

The heater can come with bi-sector, tri-sector and quad-sector arrangements according to the process demands and be vertically or horizontally aligned to best fit the site. Each heater is supplied with a central drive system, VN sealing system, advanced cleaning systems and element profiles selected from our wide range to maximise performance.

Download our brochure for more information.

Howden GGH

Enerjet™

The Howden Enerjet™ cleaning system is a method of on-line high-pressure water washing of air preheaters, designed to provide effective and efficient cleaning of severely fouled heat exchanger elements while the air preheater is in normal use.

The Enerjet™ system can be used with any type of gas gas heater from any manufacturer, and works well with most kinds of element profile.

Enerjet

Contact Seals

Flexible contact seals for rotary heat exchangers are a method of minimising the direct leakage gaps between the hot end of the rotor and the sectorplates, which separate the air and gas flows.

Standard seals fail due to constant flexing, therefore Howden carried out an extensive development programme to optimise contact seals for suitable applications providing major leakage reductions. As the seals work best in situations where gaps are small and even, leakage reduction can be enhanced further by combining with parabolic sectorplates.

Download our product leaflet for more information.

Contact Seals

Parabolic Sectorplates

Increased environmental scrutiny and demand for the highest levels of efficiency have driven Howden to develop parabolic sectorplates (patent pending) for use with our heaters.

Hot End Sectorplates are designed with variable stiffness to deform parabolically, when actuated, to match the shape of the deformed operating rotor. This minimises the hot end leakage gap.

Howden parabolic sectorplates not only reduce draft fan power in the plant, but also reduce the gas mass flow to downstream emissions reduction equipment.

Download our product leaflet for more information.

Parabolic Sectorplates

Elements

Our wide range of profiles, enables us to offer the right balance of thermodynamic performance, pressure drop and ease of cleaning for any situation. These profiles can be chosen from our range (which includes the world's first commercially available dual-profile element), or we can match existing profiles that you have already.

We are the world's leader when it comes to producing enamelled elements, which offer a combination of both corrosion protection and good cleanliness when used in rigorous environments.

Elements

Aftermarket

Our service capability encompasses all rotary heat exchangers with our own brands being Howden, Sirocco, Tallares Sanchez Luengo (TSL) and Rothemühle (including LUGAT). We can offer a range of engineering services to assess and implement performance improvements and life extensions.

Aftermarket

 
 

Rotary heater centenary

Read our article celebrating the centenary of our involvement with rotary heaters

The evolution of an idea

Read our article discussing how the original design of the rotary heater has been progressed by Howden

Implementing Tail-End SCR

Find out how Howden helped a metals plant operator improve their DeNOx plant through high performance rotary Gas Gas Heaters.

Chinese steel plant SCR

See how a steel plant obtained more efficient controls over nitrous emissions by integrating Howden’s gas gas heater to their tail gas process.

 

Technical Library

Access and download literature, specifications, case studies and more.

Contact Seals Leaflet

Fire Detection and Fire Fighting Leaflet

Howden Heaters Aftermarket

Parabolic Sectorplates Leaflet

Pre-engineered Air Preheaters Brochure

Pre-engineered Air Preheaters Brochure (German)

Rotary Heaters Brochure

Cangzhou Zhongtie steel plant

Design and supply of high performance rotary Gas Gas heaters for operation on coke plant, coal charging gas DeSOx application.

Pre-engineered APH References

Rotary heater centenary – 100 years rotary heater

An article celebrating the centenary of our involvement with rotary heaters.

Tail-End SCR Sinter Strands

Design and supply of high performance rotary Gas Gas Heaters for operation on sinter strand tail-end SCR DeNOx plant.

The evolution of an idea

An article discussing how the original design of the rotary heater has been progressed by Howden.

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Head Office  +44 141 885 7500

Package Heaters  +34 968 32 00 64