Large-scale gas heat recovery
Published: 06 July, 2021
At CHEMUK 2021, stand E31 (15-16 September 2021, NEC), HRS HEAT EXCHANGERS will showcase its range of products for recovery from exhaust gases in the chemical industry. HRS has supplied a K Series large gas heat exchanger for a Belgian chemical plant to cool the exhaust gases leaving a catalytic reactor (which can reach temperatures of up to 500 deg. C) and use the recovered heat to pre-heat the cold gases entering the reactor.
For gas applications, small pressure drops are often required, so large tube bundles are needed. This particular unit contained2,900 separate tubes–providing a total tube length of 21 km. Other design features include expansion bellows to absorb thermal dilations and stresses, and reinforced impingement rods at the shell inlet.
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When a food processing plant in North Yorkshire found that oil coolers were running too hot, and heat exchangers used for pasteurising food were struggling to keep up, the cause was quickly identified as being scale and corrosion debris in the water side of several plate heat exchangers.
