fans

On the 3rd of March 1909 LUIGI BOLDROCCHI established theactivity with the first orders for the supply of ten centrifugal fans.In 1911 the Officine Termo Meccaniche BOLDROCCHI was set up inMilano with an operating area of 3000 square meters.

In 1914 the first plant for air pollution control was produced.

The company offered a wide range of products including radialand axial fans, fire-tube boilers, coolers, dryers, ventilating andheat-exchange units and plants.In 1926, the licence for the manufacture of finned tubes wasacquired in the USA and the manufacture of extended surfaceheat-exchangers was developed.From then on, the product range has been enlarged, above all asregards air coolers and steam condensers, heavy duty and processfans, gas turbine ancillaries and diverters.

The recent acquiring and incorporation of several companies(Aeroto, Marelli Ventilazione, De Cardenas) allowed Boldrocchi toenter new market opportunities as supplier of air intake and exhaust

gas systems for gas turbine and large fans for any industrial application.In 2006 a joint-venture manufacturing company has been set up in India.

Technical drawing of centrifugal fan

D.I. high head centrifugal fansupplied in 1915

HISTORICAL NOTES

Eng. Luigi Boldrocchi (1880-1949)Founder of the Boldrocchi Company

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In three separate workshops with a total 27.000square meter manufacturing area, Boldrocchiemploys 300 staff, among which 100 aretechnicians.The shops are equipped with thermal, acousticand aeraulic test facilities.

Boldrocchi production is divided into four mainlines: heat exchange (exchangers and coolers),fans, industrial noise protection and air pollutioncontrol. Today production is featured by highlyspecialised technical contents, many decades of'on site' experiences, flexibility in design and inproduction together with high quality standards.Supplies are tailor made to fulfil all Customers’specific requests. Boldrocchi Quality system iscertified according to ISO 9001 since 1993 andaccording to ASME Code since 1998.

A wide range of materials are usually used: steel and copper alloys, aluminium, titanium and plasticmaterials; more than 200 welding procedures have been qualified. The products are subject tointermediate and final testing, witnessed by the Customers.

PRESENT SITUATION

AXIAL FANSVariable pitch bladesHigh efficiencyUse of special materials

AEROTO DIVISIONGas turbine air intake Gas turbine exhaust systems with diverters,silencers and stacksAbsorption and resonance silencers Silencers for gas exhaust of internalcombustion enginesAcoustic enclosures complete with auxiliary plants

ECOLOGIA DIVISIONFabric filters Electrostatic precipitatorsScrubbersMechanical collectorsGas coolers and conditioning towersHot gas ductsDust handlingBag filters and ESP revampingGas cleaning plants enhancementPlanned maintenance services

SERVICE DIVISIONProblem solving Field measurementsRebuilds and upgradesRevamping of existingComponent upgrade and overhaulCommissioning and erection supervisionPeriodic and preventive maintenance

POWER TRANSFORMER COOLERSOil to Air coolersOil to Water coolers single tubesOil to Water cooler double tubesLow noise fansAxial and radial pumps

MOTORS AND GENERATORS COOLERSAir-air coolers and air-water coolersExplosion proof and special equipmentComplete equipment with coolers,hoods, fans, filters and silencersHydrogen coolersOil bearings coolersHeavy duty axial fans

EXCHANGERSAir coolers for refinery service and forother industrial purposeShell and tube heat exchangersSurface condenserGas heaters and coolersAir pre-heatersFinned tube coolers and heaters.

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RADIAL FANSFor industrial applicationFlow rate : up to 600 m 3/sPressure : up to 80 kPaShaft power : up to 8.000 kWTemperature : up to 850 °CTip speed : up to 300 m/sUse of special materialsGas tightness for special fluidsWear and corrosion design

C.A.D. Workstation in technical office

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The high performance fans, as requested nowadays, involve strict proce-dures throughout all stages of design, manufacturing and testing.As regards fans materials and in particular for the rotating parts,Boldrocchi foresees high-yield materials and corrosion/abrasion protectingcoatings. Impeller and steel works calculations are performed on stressanalysis for a proper sizing of all the details.Moreover the rotating parts are designed to avoid any resonance with thesupporting structures.Boldrocchi manufactures its fans using certified materials. All weldings arecarried out according to proper specifications by pre-qualified welders andwith pre-qualified procedures.Stringent dimensional and ND tests are performed on all the portions andon the whole assembled fan. Impellers are carefullybalanced on high-sensitivity balancing machines.

FANSToday Boldrocchi spans over a wide range of fan types, used in all indu-strial applications. The growing importance of these machines marked thesteps of a continuous and quick technical evolution, to which Boldrocchihas perfectly adapted in terms of design and manufacturing capabilities. Forinstance, with the recent acquisition of the technical and production know-how of Aeroto, De Cardenas and Marelli Ventilation Companies,Boldrocchi became an outstanding supplier, not only in Europe, in theheavy duty fans field.Synergies with Aeroto Dept. for acoustic treatment and with BoldrocchiEcologia for gas dedusting are another strength point of Boldrocchi fanproduction.

Special productsTwo axial fans for abattery of 14 for a windtunnelDiameter 1750 mmInstalled power 132 kWSpeed 990 rpm

Performance testTest room in Biassonoworkshop as per AMCA 210Fig.7 - Outlet duct setup

DESIGN,CONSTRUCTIONAND TESTS

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A deep search based on software finite element calculations allowsBoldrocchi to choose the proper size and materials of the designed fan, inorder to match the customers’ requirements.In our test room (the largest in Italy) tests are carried on in compliance withinternational standards, even on fan prototypes, in order to point out theirperformance curves : flow rate-pressure, flow rate-power, flow rate-noiselevel.The experimental data are processed by the Engineering Department tooptimize the fans series.Special tests are performed, on case by case basis, to verify the fans per-formances, even assembling specific test rigs.

R&D

PROCESSENGINEERINGAND SERVICE

Thanks to an extended experience in the ventilation business, Boldrocchiis able to supply to customers a valuable and reliable engineering consul-tant service, on already installed fans, to increase performances, to complywith environmental rules, and to save energy, either on own production fansor on fans supplied by other manufacturers.This service integrates the after sale service, dedicated mainly to periodicand predictive maintenance, mechanical troubles diagnostic and solution,dynamic balance of rotors in site and erection supervision.

Finite ElementAnalysis

Highly stressedimpeller analysed withshell and brick element

Special testHot gas test for

chlorination blowerTest performed at

500°C for 4 hours and1 hour withoutlubrication unit

New productsMechanical vapour

recompression blowerDouble stage blower

with duplex steelimpeller of 1420 mmrunning at 3600 rpm

POWER

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Gas recirculation fanDouble inlet type,during heat insulationassemblyFlow rate 67 m3/sStatic pressure 9 kPaShaft power 850 kW

Combustion air fanAssembling in works-hop for running testFlow rate 341 m3/sShaft power 2420 kW

Forced draft fanDouble driven fan forsteam boilerFlow rate 59.4 m3/sStatic pressure 8.3 kPaShaft power 600 kW

Forced draft fans, primary and secondaryair fans, gas recirculation fans, induceddraft fans for power boilers,deNOx/deSOx systems.

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Extraction fanFor water saturated fluegas from refuse incineratorRubber lined casing with

Uranus B6 impellerFlow rate 16.5 m3/s

Static pressure 11.7 kPaShaft power 234 kW

Induced draft fanFor deSOx application in

an incineration plantFlow rate 51.7 m3/s

Static pressure 11 kPaInstalled power 700 kW

Speed control byhydraulic coupling

Induced draft fanWelding of titanium

impeller for wasterefusal gas

Impeller diameter 2500 mmStatic pressure 23 kPa

Forced draft fans, primary and secondary air fans, induced draftfans for incinerating plants.

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INCINERATORS

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Chlorination plantDye penetrant test onplug unitOperating at 500°C, thefan is manufactured inInconel 600

Fertilizer plantDouble stage boosterblowerFlow rate 2.4 m3/sStatic pressure 42.4 kPaShaft power 158 kW

Hydrogen plantForced draft faninstalled on site,with air intake andVenturi ductFlow rate 60 m3/sStatic pressure 5.9 kPaShaft power 1000 kW

CHEMICAL ANDPETROCHEMICALFans for hydrocracking, ethylene, ammonia and urea, chlorination,methanol, allumina plants, etc.

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Raw mill fanWelding of double inletimpeller with radial tip

blades andwear plates

Diameter 2050 mm

Exhaust fan afterbag filter

Manufactured withstainless steel casing,

during running test

Crane lifting of fan forpositioning on

foundationsFlow rate 228 m3/s

Static pressure 12 kPaShaft power 3002 kW

Double motor 2 x 1700 kW

CEMENT Raw mill fans, kiln primary air fans, kiln exhausters, filter exhausters, finalexhausters, grate cooler fans, clinker grate exhausters, cement mill fans,coal mill fans, separator fans. Turn key plants and filters can be suppliedin cooperation with Boldrocchi Ecologia.

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Exhaust fans forP.E.M. roomAxial type with variablepitch blades (at rest)Impeller diameter 1700 mmFlow rate 33.3 m3/sStatic pressure 0.85 kPaInstalled power 86 kWSpeed 1180 rpm

Main enginecombustion air serviceHot deep galvanisedcentrifugal fansFlow rate 33.3 m3/sStatic pressure 1.5 kPaInstalled power 110 kWSpeed 1780 rpm

Main enginecombustion air serviceAxial type with variablepitch blades (at rest)Impeller diameter 1000 mmFlow rate 19.5 m3/sStatic pressure 0.7 kPaInstalled power 25/16 kWSpeed 1780/1180 rpm

MARINEAPPLICATIONSSupply and exhaust fans for compressor room, for evaporatorsroom, for purifier room (combustion and cooling air), for diesel gene-rator (combustion air), for propulsion electric motor, for battery room.

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Sinter plantventilation fan

Impeller diameter4050 mm

Flow rate 236 m3/sInstalled power 3900 kW

Exhaust fansFlow rate 216 m3/s

Static pressure 5.1 kPaInstalled power 1600 kW

Speed 980 rpm

Cooling air fanfor sinter plant

Heavy duty axial fan withvariable pitch

blades (at rest)Flow rate 125 m3/s

Static pressure 3.3 kPa

METALLURGYCombustion air fans, boosters, exhausters for: EAF, LD converter, sinter plant,stockhouse, continuous casting, Coluper, etc. Turn key plants and filters can besupplied in cooperation with Boldrocchi Ecologia.

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BOLDROCCHIFACTORY IN BIASSONO

Ed.

01/

2007

BOLDROCCHI HEADQUARTERS: Viale Trento e Trieste 93 - 20046 BIASSONO (MI) - ItalyPhone +39-039-2202.1 - Fax +39-039-2754200

Web Site: www.boldrocchi.it - e-mail: boldrocchi@boldrocchi.it

FACTORY: Via Buonarroti 66 - 20043 ARCORE (MI) - ItalyPhone +39-039-617515 - Fax +39-039-6014451

BOLDROCCHI INDIA: OFFICE AND FACTORY - CHENNAI - IndiaPhone +91.44.23713359 - Fax +91.44.24899321 - e-mail: alagappan@boldrocchi.org

SALES OFFICE - DELHI - IndiaPhone/Fax +91.124.5062498 - e-mail: nokesh@boldrocchi.org

MAIN CUSTOMERS

POWER AND INCINERATORSABB Alstom Power | ACCAM | AEM Cremona | AEM Milano | Ambiente | Ansaldo | ASM Brescia | Aster | Babckock – Badcock Riley Power

Bono Energia | CEI | CCT | ENEL | Foster Wheeler | ISE | Larsen & Toubro | Lurgi | Macchi | Nooter | Eriksen | Nuovo Pignone

CHEMICAL & PETROCHEMICAL APPLICATIONSABB Lummus | BHPV | Caffaro | Callidus | Chiyoda | Dow Chemicals | Enichem | Fluor | Foster Wheeler | Idrotermici | ISAB | Koch International | KTI |

Larsen & Toubro | Linde | MAN Ferrostaal | SARAS | Siirtec Nigi | Snamprogetti | SNIA | Technimont | Technip | Heurtey | UHDE

CEMENTBuzzi/Unicem | Calcia | CBMI | Cementir | Cementerie Merone | Ciments du Maroc | Colacem | Italcementi | LV Europe | Polcons Cement | Cementi

Rossi | Sacci | Vassiliko | Vulkan

NAVAL APPLICATIONSAtisa | Cantiere Navale F.lli Orlando | Cantieri Navali Sestri | Carnival Cruise Line | Costa Crociere | Dalian Ship Yard | Disney Cruise Line | Fincantieri |

Gesco | Grimaldi Grandi Navi | Holland America | Minoan | Nuovi Cantieri Apuania | P&O Cruise | Sana | Snamprogetti | Tirrenia | Tor-Line

METALLURGYAFS | Danieli | Demag Italimpianti | Jindal | Nuova Samim | Riva | Stein Heurtey | Techint | Tunga | Voest Alpine

SPECIAL APPLICATIONSHamon Research Cottrell | Lurgi | Mussi | Saint Gobain | TMC Padovan

TRAINAnsaldo Trasporti | Firema | Marelli Trazione | Parizzi

BOLDROCCHI FACTORY IN ARCORE

BOLDROCCHI HEADQUARTERS: Viale Trento e Trieste 93 - 20046 BIASSONO (MI) - ItalyPhone +39-039-2202.1 - Fax +39-039-2754200

Web Site: www.boldrocchi.it - e-mail: boldrocchi@boldrocchi.it

FACTORY: Via Buonarroti 66 - 20043 ARCORE (MI) - ItalyPhone +39-039-617515 - Fax +39-039-6014451

BOLDROCCHI INDIA: OFFICE AND FACTORY - CHENNAI - IndiaPhone +91.44.23713359 - Fax +91.44.24899321 - e-mail: alagappan@boldrocchi.org

SALES OFFICE - DELHI - IndiaPhone/Fax +91.124.5062498 - e-mail: nokesh@boldrocchi.org