32 | Plant & Works Engineering>> www.pwemag.co.uk August/September 2023 Energy & Environmental Management Focus on: Boilers, Burners & Controls Thermal Oxidisers with a more effective Regenerative Thermal Oxidiser capable of treating the complete cooking exhaust stream irrespective of the process heat load - an important feature in the fast moving food industry. The exhaust air from the cooking processes is fed through a heated matrix of specialist ceramic honeycombs. It enters the Oxidiser at around 60°C and is heated to 850°C by the ceramics, with a small burner adding the final heat to get the stream to full oxidation temperature. The exhaust stream is treated by passing it through three towers which operate on a fixed rotation thereby ensuring a constant treatment profile. The clean, odour free air is then released to the atmosphere. An almost unique project in the food industry, the installation has proven to be very reliable with the bare minimum of maintenance or cleaning requirements to meet its round the clock duties. Up to 25,000 Nm3/h of cooking exhaust is treated at the site with the minimum of natural gas input. It is completely automatic which means production lines can be switched on or off to meet production requirements without having to make adjustments to the Oxidiser settings. A secondary heat recovery system, which will provide up to 200kW of hot water from the clean exhaust air, has also been incorporated, thereby increasing the overall efficiency of the system and reducing overall site gas demand. Deodorising Oxidisers Deodorising Oxidisers are designed solely to abate odours and vapour emissions generated by various production processes and are particularly ideal for frying processes, meat processing, rendering and coffee and barley roasting. Unlike standard Thermal Oxidisers, these are specifically designed plants tailored to meet the particular requirements of each site process. Odours are processed at a temperature of up to 950°C for approximately 0.8 seconds. A heat recovery boiler recovers energy from the flue gas stream and feeds it back to the process using steam or thermal fluid. Dwell times are adjusted to suit the specific process. Deodorising Oxidisers have an overall efficiency over 95%. Conclusion No food producer willingly pollutes its surrounding atmosphere with unacceptable odours and all are aware that an abatement notice has a potentially devastating impact on their business. Assessing odour and ensuring it is treated appropriately is a priority, especially for premises in built up areas. Thermal Oxidisers provide an effective and cost-efficient method of achieving this. For further information please visit: www.babcock-wanson.co.uk COMBUSTION ENGINEERING Gas Process Burners FD-GA modulating gas + air process air heating burners. TX high efficiency small diameter immersion tube tank heating systems. FD-E low cost high turndown oven/dryer air heating burners. FD-C high turndown oven/ dryer air heating burners. Midco HMA high efficiency, high turndown, air replacement or “make-up” air heating burners. Lanemark gas burner systems offer users reliable, high efficiency, process heating solutions. FD Series Packaged Oven/Dryer Burners • Specifically designed for process air heating applications in convection ovens and dryers • High turndown/short flame lengths providing accurate process temperature control • High efficiency gas + air modulation, gas only modulation and simple high/low control options • Heat Input Range: 9 kW – 1550 kW TX Series Gas Fired Process Tank Heating Systems • High efficiency (80%+) heating of all types of spray and dip process tanks • Compact high efficiency small diameter immersion tube heat exchangers occupying minimum tank space • Accurate performance modelling using Lanemark TxCalc design software • Heat Input Range: 15 kW (1½") – 1150 kW (8") Midco HMA Series Air Replacement or “Make-Up” Air Heating Burners • Direct fired, high efficiency burner systems, for high volume air heating applications such as paint spray booths, ovens and dryers. • Supplied either as Midco burner heads for OEM system integration or as Lanemark DB or FDB complete packaged systems including modulating gas valve trains and controls • Wide range of firing rates to suit alternative temperature rise and air velocity system requirements • DbCalc system design software Lanemark Combustion Engineering Limited Lanemark House, Whitacre Road, Nuneaton, Warwickshire CV11 6BW United Kingdom Tel: +44 (0) 24 7635 2000 Fax: +44 (0) 24 7634 1166 E-mail: info@lanemark.com www.lanemark.com
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