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276461_PCT00081EN:PPM00056EN_QXD 01/10/07 9:37 Side 2 Alfa Laval in brief Alfa Laval is a leading global provider of specialized products and engineered solutions. Our equipment, systems and services are dedicated to helping customers to optimize the performance of their processes. Time and time again. We help our customers to heat, cool, separate and transport products such as oil, water, chemicals, beverages, food- stuffs, starch and pharmaceuticals. Alfa Laval – spiral heat exchangers Our worldwide organization works closely with customers in almost 100 countries to help them stay ahead. The all-round heat transfer solution How to contact Alfa Laval Up-to-date Alfa Laval contact details for all countries are always available on our website at www.alfalaval.com PCT00081EN 0709
276461_PCT00081EN:PPM00056EN_QXD 01/10/07 9:37 Side 4 Spiral-shaped heat exchangers are not a new idea – but Alfa Laval has perfected the design. Exceptional compactness and self-cleaning design make Alfa Laval spiral heat exchangers extremely versatile. Ideal for everything from dirty fluids to high vacuum condensation.
276461_PCT00081EN:PPM00056EN_QXD 01/10/07 9:37 Side 6 The perfect solution From dirty fluids to high vacuum condensation – spiral heat exchangers from Alfa Laval can do it all The idea of using spiral-shaped fluid Product ranges Customer needs met Strong on customized solutions The design, shape and size of the Heat exchange duties that benefit from channels for heat transfer arose in We provide fixed-size and customized with customized design The spiral heat exchanger is a very ver- spiral channels can be customized so the strengths of spiral heat exchangers response to a particular customer’s product ranges to meet the needs of No two customers are alike, and nei- satile product. that they are a perfect match for the include: process problem. Other technologies our customers. ther are their plants or their processes. demands associated with a wide range G liquid/liquid heating, cooling or heat had failed, but in this case a spiral To meet all these different needs, Many of the duties performed by heat of process fluids, thermal duties and recovery, where one or both of the proved to be the perfect solution. Fixed-size ranges engineering solutions and process exchangers require one channel per industrial applications. fluids may cause fouling. We make small units for general use, equipment must be adaptable. fluid, and this can be a distinct benefit. That was nearly 70 years ago. and for application-specific purposes G vapour/liquid condensing, particular- such as the wastewater industry. Each Alfa Laval spiral heat exchanger ly at very low pressure and/or high- Today, spiral heat exchangers fit per- design can be customized to meet the volume flow. fectly into Alfa Laval’s extensive prod- precise process and application needs uct portfolio – still providing customers of individual customers. with optimum process solutions. Unique shape has unique properties Spiral heat exchangers are particularly A spiral heat exchanger is precisely useful when a process is “dirty” or what it says – a circular heat ex- “difficult”. In such circumstances, spiral changer with two concentric spiral heat exchangers have clear advan- channels, one for each fluid. tages over other products that employ heat exchange technologies. The curved fluid channels provide opti- mum heat transfer and flow conditions Alfa Laval spiral heat exchangers are for a wide variety of fluids, while keep- designed on the basis of our extensive ing the overall size of the unit to a thermal and mechanical experience, Customized range minimum. acquired from both our customers and To meet requirements for a range of our production sites. sizes and specifications, the majority of The result is a heat exchanger that pro- the spiral heat exchangers we supply vides maximum heat transfer efficiency, are individually customized. while only taking up a minimum of installation space. 4 Alfa Laval – spiral heat exchangers Alfa Laval – spiral heat exchangers 5
276461_PCT00081EN:PPM00056EN_QXD 01/10/07 9:37 Side 8 Unique performance – the spiral’s high efficiency and easy access design make heat recovery possible with two The self-cleaning heat exchanger for fouling fluids – shown here at a municipal sludge pasteurization plant. demanding liquid/liquid duties Single channel technology makes keeping clean easier Some customers choose spiral heat Single channel technology – what performs for much longer periods, and Easy access Two covers enable one or two exchangers to boost the performance goes in must come out only requires maintenance during When processes involve fluids that are fouling fluids of their existing processes. Others use As the name indicates, single channel routine plant shutdowns. capable of causing a high degree of Both hot and cold channels are them for thermal duties in processes technology means that both fluids fouling, it is important to have easy designed to perfectly match the special that would otherwise simply be occupy a single channel, which allows Fewer units access to the inside of the heat needs of the fluids being used and the impossible. fully counter-current flow. One fluid The increased thermal efficiency result- exchanger for cleaning and inspection. thermal duty being performed. This enters the centre of the unit and flows ing from the fully counter-current flow provides total operational security Whether replacing existing “inefficient” towards the periphery. The other fluid very often means that a particular Compared with other types of heat when using either one or two fluids that technology or being used in revolution- enters the unit at the periphery and assignment requires fewer spiral heat exchanger, spiral units provide the best cause high fouling. ary new applications, spiral heat moves towards the centre. exchangers than the straight-tube access to their heat transfer area – exchangers are the first choice for alternative. with no special tools or lifting equip- This is a major advantage for cus- processes that involve demanding The channels are curved and have a ment required. tomers that want to recover heat from liquid/liquid duties. uniform cross section, which creates a Lower installation costs one dirty fluid to another. “spiralling” motion within the fluid. Spiral heat exchangers only require a Each fluid channel is easily accessed very small area for mounting and via its cover, exposing the whole of the Spiral units are the only type of heat Full draining for batch operation The fluid is fully turbulent at a much access, resulting in lower unit installa- heat transfer surface. exchangers capable of direct heat All spiral heat exchangers can be lower velocity than in straight tube heat tion costs compared with other heat interchange between two fluids that drained in position, without any need to exchangers, and each fluid travels at exchangers. cause high fouling. disconnect pipework or to open constant velocity throughout the whole the units. unit. This removes any likelihood of dead spots and stagnation. For applications where complete drain- ing of the process fluid is required on a Solids are thus kept in suspension, and regular basis, the spiral heat exchanger the heat transfer surfaces are kept can be installed in an upright position. clean by the scrubbing action of the spiralling flow. This is particularly useful for batch pro- duction processes as it makes it pos- Self-cleaning keeps costs down sible to empty all fluid from the unit The self-cleaning properties of spiral between batches. heat exchangers ensure that the reli- able performance of efficient heat transfer is guaranteed, with minimum Fewer units, less down time down time for maintenance. In a coke oven plant, four shell-and- tube units were replaced by just one In some duties where alternative heat spiral heat exchanger. This saved exchangers would need regular clean- space and cost, while increasing ing, disassembly, repair and performance at the same time. maintenance, a spiral heat exchanger 6 Alfa Laval – spiral heat exchangers Alfa Laval – spiral heat exchangers 7
276461_PCT00081EN:PPM00056EN_QXD 01/10/07 9:37 Side 10 Working closely with our customers The customized condenser helps them to optimize their processes and introduce new forms of heat exchange – such as this fully built The versatility of spiral heat exchangers makes them ideal condensing tower with three spiral bodies. for customized solutions One of the best examples of the flexi- Maximum product recovery with Cross-flow condensing with the Two units in one – cross-flow and Installation costs reduced still Condensers can also separate bility of a spiral heat exchanger is its counter-current condensing lowest possible pressure drop counter-current paths in the further Separation of the condensate pro- capability as a condenser. To condense a mixture of vapours Condensing large volumes of pure same unit Because of their function, condensers duced from the inert gases takes place and inert gases, a heat exchanger vapour needs a unit with a large The flexible flow-path arrangement and are often mounted high up at the top inside the spiral. Condensate can Different condensing duties place dif- needs a long flow path. In a spiral cross-sectional area and a short installation possibilities provided by of distillation columns. therefore easily be fed back into the ferent demands on a heat exchanger. heat exchanger this is easily achieved, flow path. To achieve this, the spiral heat exchangers give them column for reflux, or removed for fur- The desired condensing performance as the vapour flows in a direction that vapour passes through the con- important advantages compared with Due to this high placing, all the ancillary ther processing, without the need for is achieved by determining the flow is counter-current to the cooling liquid. densing channel in cross flow. other condensing solutions. equipment must be supported on a external separation equipment. path of the vapour. separate structure. This greatly in- This results in a very compact con- When the vapour/condensate operate Two heat exchange duties can be per- creases the costs of installation, Fitting a spiral condenser to a tower Alfa Laval spiral condensers perfectly denser with the best heat transfer in cross flow, the pressure drop is virtu- formed within a single spiral to further running and maintenance. thus not only increases condensing complement Alfa Laval’s other process efficiency for maximum product ally undetectable. This makes the spiral reduce capital equipment costs, and to performance, but also reduces ancillary condensers – the AlfaCond and the recovery. The counter-current spiral condenser ideal for systems that oper- maximize operating efficiency. Spiral condensers, however, are avail- equipment costs and removes the Compabloc – to provide customers condenser can also be designed to ate at very low pressure. able as self-contained units or, more need for support structures. with a full range of condensers for the sub-cool the condensate and/or the For example, a spiral heat exchanger importantly for many customers, as a entire range of their processes and inert gases. can act as a condenser and sub-cooler column-mount to fit directly onto or Coolant applications. for condensate and/or inert gases, or within an existing distillation column or as a pre-heater to remove sub-cooling stripper tower. Vapour for vaporizer and reboiling duties. Coolant It is also possible to build more than Vapour Inert gas Coolant Inert gas one spiral heat exchanger unit into a complete condensing tower to accom- Coolant Inert gas Coolant modate multiple condensing stages, Condensate such as cooling water, chilled water Condensate and refrigerant. Vapour from column Coolant Coolant Condensate Coolant Inert gas Vapour from column Condensate Direct mounting of a spiral condenser at a stripper tower reduces installation costs, increases product recovery and reduces pollutant escape. 8 Alfa Laval – spiral heat exchangers Alfa Laval – spiral heat exchangers 9
276461_PCT00081EN:PPM00056EN_QXD 01/10/07 9:37 Side 12 History, experience and expertise It takes experience to build the kind of expertise that provides answers The largest manufacturer of heat Inspiration from our customers transfer equipment in the world Our best source of information and Our worldwide sales and service repre- inspiration is our customers. sentatives ensure that we can provide excellent local service to all prospective Spiral heat exchangers are customized and existing customers, while also products, engineered to meet the drawing on the wider experience and needs of each new installation. After expertise accumulated within our all, no two customers are alike, and global organization. neither are their plants or their pro- cesses. This wealth of knowledge and experi- ence is especially relevant to the spiral Over time, spiral heat exchangers have heat exchanger. become standard equipment for a Continual development great many processes in many Alfa Laval has been making spiral heat Spiral heat exchangers are a well- industries. exchangers for more than forty years. established product, and have been During this period, Alfa Laval has pro- around for a long time. Nevertheless, We enjoy working closely with our cus- duced more than 30,000 spiral units Alfa Laval heat exchangers are tomers to meet the challenge of for a wide variety of industries and cus- designed using the very latest tech- improving their processes. Selecting tomers all over the world. niques and testing methods. spiral heat exchangers can help cus- tomers in the following ways: Today, Alfa Laval has three production Our sales staff are equipped with G by improving an existing thermal duty sites that provide worldwide supply sophisticated, state-of-the-art calcula- G by helping to develop alternative and service to its spiral heat exchanger tion and quotation tools. solutions and new processes customers. Our manufacturing and R&D depart- Whatever the duty, Alfa Laval has an They are situated in: ments are constantly working to make extensive catalogue of references, the G France improvements on production tech- necessary experience, and a complete G The United States niques and component design – again heat exchanger product portfolio. We G India drawing on the vast pool of skills and are confident of being able to recom- know-how available within Alfa Laval. mend the best heat exchange solution Please contact your local Alfa Laval for your process. representative to arrange a visit and request a tour of our facilities. 10 Alfa Laval – spiral heat exchangers Corporate Brochure 12 Alfa Laval – spiral heat exchangers 11
276461_PCT00081EN:PPM00056EN_QXD 01/10/07 9:37 Side 14 Performance and applications Performance range Typical applications Minimum Maximum Type of fluids and gases Fouling liquids – containing solids, fibres, liquors, slurries and sludges. Area range per body 1m 2 700 m 2 Gases – pure vapour and mixtures with inert gases. 10 ft 2 7000 ft 2 Type of duty Liquid/liquid – preheating, heating, cooling, interchanging, heat recovery. Design temperature -100 0C 400 0C Vapour/liquid – top condensers, reflux condensers, vacuum condensers, -150 0F 750 0F vent condensers, reboilers, gas coolers. Design pressure Full vacuum 40 barg and above Type of industry 580 psig and above G Petrochemical G Refinery Pressure vessel codes PED, ASME, AS1210 and others G Steel making G Pulp and paper Standard construction materials Stainless steel, carbon steel G Metal/ore processing G Wastewater treatment G Pharmaceutical Other construction materials Any metal that can be cold formed and welded – including G Vegetable oil processing Duplex, titanium, Hastelloy, 904L G Distillery 12 Alfa Laval – spiral heat exchangers Alfa Laval – spiral heat exchangers 13
276461_PCT00081EN:PPM00056EN_QXD 01/10/07 9:37 Side 16 Nonstop Performance A lifetime commitment In terms of service, we speak your For us at Alfa Laval, our obligation to language. Alfa Laval service is based you as a customer does not stop on a profound insight into the needs short at delivery. Our Parts & Service of the process industry. We see every organization is there to ensure that product as part of a process and your process always runs at peak understand the role it plays within performance. This is a commitment that process. We can therefore work that extends throughout the lifetime in close collaboration with you to tailor of the system. We call it Nonstop an individual service package that Performance. matches your requirements perfectly. Nonstop Performance is based on our Service must result in bottom-line global network of experts, who are benefits. We therefore help you to always on standby to provide you with calculate the savings that will result genuine spare parts on site, in more from any proposed service package, than 50 countries, 365 days a year, and the real-term benefits it will right around the clock. provide. Challenge us to show you! 14 Alfa Laval – spiral heat exchangers