Process Equipment Update
HRS has also supplied two KH 225 273/12 4.0m shell and tube heat exchangers to the Waste Recyling Group’s (WRG) Eastcott energy-from-waste plant in Nottingham, UK. The installation of heat exchangers ensured waste heat recovery in the high pressure hot water for the incinerator that feeds a turbine. The capability of HRS heat recovery systems to retrofit into existing systems encouraged WRG to replace existing units. HRS matched up to the existing site connections and designed to suit the space left by the failed parts. The HRS K series heat exchanger is an all stainless steel
shell and tube heat exchanger for industrial use and an ideal heat exchanger for steam to water applications such as CIP heating. The four-metre long units were supplied with AEL headers that allow the customer to visually inspect the tube side of the heat exchanger, without having to remove site pipe work. In another development, HRS has won a €1m grant
from the European Commission-Research Executive Agency (EC-REA) towards the development of a new evaporation technology and better processes for volume reduction of environmental waste (Fig. 1).
Fertilisers Pig manure is a huge problem across Europe and has been identified as a major environmental issue in Brussels. The large volume of pig manure and its daily use as fertiliser for agriculture is responsible for causing serious environmental problems. The project is aimed at developing an integrated and cost-effective solution to reduce the volume of pig slurry, minimise the pollutant emissions and process energy consumptions. The main technology to be used here is the special
version of the Unicus for evaporation applications. Unicus is a scraped surface heat exchanger for high fouling and viscous fluid applications. During evaporation, in case of the Unicus, the scraping action keeps the heat transfer surface clean and maintains heat transfer high. This allows the Unicus to concentrate to levels where traditional technologies fail. HRS says that this makes the Unicus the ideal solution for concentration of environmental waste where volume reduction is vital. Alfa Laval has launched a new plate heat exchanger called FusionLine. It features a novel design with a truly open flow
and no contact points. The company says that FusionLine offers the best of both worlds, combining the energy efficiency, accessibility and modularity of plate technology with the viscous and particulate-handling capabilities of tubular technology. As such the company says it is a great choice for viscous and particulate products such as juices, prepared foods, soups and sauces, which have traditionally been processed in tubular heat exchangers (Fig. 2). By extending beyond technology boundaries, FusionLine
enables food and beverage manufacturers to optimise their performance without compromising on end-product quality, characteristics or economy. Combining benefits in this way adds an extra dimension in freedom of technology choice. Now the process and the customer can dictate the solution to a much greater extent. Achim Heiming, competence centre manager thermal,
Alfa Laval, says: “FusionLine is an excellent complement to traditional technologies, providing a new level of flexibility. It’s a solution that should help keep production costs down and end-product quality up.” FusionLine features a 4-6 mm open channel on the
product side, which is easy to CIP and fully accessible. The open-channel design is made possible by bonded plate cassettes on the media side. The cassettes are bonded using Alfa Laval’s patented AlfaFusion technology, which bonds two stainless plates together into one piece with no joints. The AlfaFusion technology allows the use of thin plates
providing optimum heat transfer, and thus maintains a high resistance against product pressure. The unique channel geometry ensures gentle product treatment. Plates can be easily added and removed, providing the flexibility to react to changes in production volume. The footprint is also 30-40 per cent smaller than a tubular heat exchanger. In summary, FusionLine is different because: there are
zero contact points on the product side; it has a low pressure drop, requiring low pumping power; it has a small footprint; and it is easy to clean and inspect.
Welded plate supplier chosen During 2012, Dutch state-owned company Gasunie will complete work on a gigantic nitrogen buffer storage facility. Nitrogen is required as an additive for gas delivered directly to
Full service for heat exchangers A
long with Bowman exchangers, plate heat exchangers and air- cooled heat exchangers, Allied
Heat Transfer also designs, manufactures and services shell and tube heat exchangers. They are widely used for liquid-to-liquid and liquid-to-gas applications such as oil cooling, condensing, jacket water or gas cooling.
The company puts every effort into providing the optimum design of heat exchanger for its clients’ conditions, taking into account factors such as performance
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requirements, environment, safety, material selection, service schedules and required service life. Allied’s design staff are very experienced and are skilled in providing the best solution and the company believes that time spent at the design stage is time well spent.
Design capabilities include AS 1210, AS
1228, ASME (Div 1 and 2), BS 5500. Using the latest HTRI thermal design software the company is able to provide thermal designs for new installations and projects or model changes to existing processes and vessels.
For proprietary design heat exchangers Allied tries where possible to offer removable tube-stack heat exchangers to clients as this design allows for easy future maintenance of the shell side and a floating tube stack also accommodates thermal expansion and generally increases the service life of a unit. When the need for a heat exchanger is urgent, as in the case of a breakdown, Allied has a large range of heat exchangers in stock ready for immediate delivery and its experienced staff will select the one most suited to the application. ■
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