Air Preheater
A key contributor to industrial efficiency, recovering heat energy from process to raise feed air to optimal levels. Used across boiler-based power plants and industries with fired heaters.
A key contributor to industrial efficiency, recovering heat energy from process to raise feed air to optimal levels. Used across boiler-based power plants and industries with fired heaters.
Howden has been involved with rotary regenerative air preheaters since first forming a joint venture with Fredrik Ljungström, the inventor, in 1923. Our own product technology has seen design improvements through continual research, development and analysis to optimize product performance and reliability.
Howden’s Air Preheaters 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.
The pre-engineered heater product range provides operators looking to recover energy from fired equipment a highly efficient, low maintenance solution in a compact footprint. It can handle flue gas flows of under 50 tonnes per hour to around 200 tonnes per hour and recovered energy can extend to over 15MW depending on gas temperature drop
The heaters are suitable for integration into new plant development as well as replacements of alternative technologies within operational sites. All heaters are fully supported by Howden’s global pre-sales and aftermarket capabilities to ensure ease of project engineering and reliable long-term performance.
Download our brochure for more information.
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 air preheater from any manufacturer, and works well with most kinds of element profile.
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.
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.
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.
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.
Howden’s Air Preheaters 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.
The pre-engineered heater product range provides operators looking to recover energy from fired equipment a highly efficient, low maintenance solution in a compact footprint. It can handle flue gas flows of under 50 tonnes per hour to around 200 tonnes per hour and recovered energy can extend to over 15MW depending on gas temperature drop
The heaters are suitable for integration into new plant development as well as replacements of alternative technologies within operational sites. All heaters are fully supported by Howden’s global pre-sales and aftermarket capabilities to ensure ease of project engineering and reliable long-term performance.
Download our brochure for more information.
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 air preheater from any manufacturer, and works well with most kinds of element profile.
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.
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.
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.
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.
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