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HEAT E XCHANG ERS F OR A WORLD


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O F ENERGY


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BURMEISTER & WAIN ENERGY A/S .......It all began in 1843

The first Ljungstrm Air Preheater from 1920

Burmeister & Wain Energy A/S is a Danish company with manyyears of experience as a supplier of high-tech solutions for thepower generation industry.

The company dates back to a period when Denmarks industrialdevelopment had not yet gained momentum. The history of thecompany began in 1843 when a young and enterprising engineer,Hans Heinrich Baumgarten, was awarded a royal license toestablish a machine shop in Copenhagen.

In 1846 he went into partnership with Carl Christian Burmeister.Baumgarten retired in 1861 and was succeeded in 1865 by WilliamWain, and the company Burmeister & Wain was finally founded in1872 soon becoming the largest and most important enterprise in

the iron industry of Denmark.

In 1980 Burmeister & Wain Energy A/S (BWE) was established asan independent company, and in 2002 it was acquired by the Italiancompany STF SpA.

The history of the regenerative heat exchangers in BWE startedin 1958 when the company acquired a licence for Ljungstrmheaters. Fredrik Ljungstrm was a Swedish engineer who inventedthe process in 1920.

The licence agreement was in force until 1984 and when it cameto an end BWE continued to develop and design the heaters asown technology and today these heaters are marketed as BWEregenerative heaters.

BWE supplied the first Air Preheater in 1961 for a 195 MWe powerplant in Denmark and the first Gas-Gas Heater was supplied in1987 for an FGD plant in Holland.

Up to now BWE has supplied more than 135 units successfully andhas an extensive experience with the technology.


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Vision

To remain a leading supplier of boiler and

environmental technology through technology

supply and engineering services to national

and international clients.

To be a signicant international player in

the upgrading of existing boilers for higher

efciencies, lower emissions or for conversion

to alternative fuels.

To be a signicant European player providing

services and maintenance to utilities directly

or through alliances.

. this to ensure andenjoy a better future

Advanced Clean Technology in

Boiler Design

Fossil fuels and especially coal will be themain energy source to cover the increased

demand for power generation for many years

to come in a growing world.

The BWE Advanced Clean Technology in

boiler design is an important factor in meeting

the worlds CO2reduction target.

By introducing the best available technology

both in new power plants and when retrotting

existing, the plant efciency is increased and

consequently the CO2emissions are reduced.

The BWE Ultra Super Critical Flex Boiler is

a solution to utilize fossil and biomass fuels

in USC boilers maximizing efciency, fuel

exibility and use of renewables.

The rst step to make Carbon Capture and

Storage (CCS) viable is to maximize efciency.

The BWE USC Flex boiler and its

high efciency makes the subsequent

implementation of the CCS technology

feasible.

BWE benefits from being part of the history ofpower generation in Denmark

Since the energy crisis of the early 70s, Danish power industry has been focusing on the

environment, fuel flexibility and efficiency.

The collaboration of BWE with local utilities has allowed our company to acquire direct

experience with different fuels, biomass combustion, co-combustion, high efficiency and load

flexibility.

BWE exports the Danish example in power generation to the worldwide market.


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for new plants and for rehabilitation of

existing plants

BWE has developed and designed both Air Preheaters and Gas-GasHeaters as a proprietary technology since 1984.

BWE designs and builds Air Preheaters and Gas-Gas Heaters tominimize the leakage and maximize the thermal efficiency.

BWEs design calculations for Air Preheaters and Gas-Gas Heatersare impressively precise. BWE is able to design the machines in such

a way that the performance corresponds exactly to the calculations.

BWEs proven measures regarding improved efciencies can almostalways be built into existing Air Preheaters & Gas-Gas Heaters.

BWEs Air Preheaters and Gas-Gas Heaters are simple in theirstructures and therefore extremely easy to service.

BWEs Gas-Gas Heaters are easy to protect against corrosion dueto their simple structure and due to corrosion protection beingincorporated in the design.


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BWE can offer to modernize and improve the performance of existingheaters regardless of make.

The work can comprise:

installation of new improved sealing systems modication of existing air heaters for SCR application new cleaning systems delivery of new heating surface in mild or corten steel or with vitreous

enamel coating

general repair and maintenance work

Advantages:

Higher Efciency Lower maintenance costs Larger ROI Implementation of improved sealing system Renovation of rotor grate and casing Improvement of design and supply of new heating elements Modernization of soot blowers Performance tests Service at site

Rehabilitation and improvement

of APH & GGH

New enamelled baskets installedduring the rehabilitation of an old

APH

New circumferential seal


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The shape of the rotor changes from cold to hot condition due to thetemperature difference between the hot upper part of the rotor andthe cold bottom part. In order to retain a fixed minimum gap between

the sector seal plate and the rotor, the sector seal plates must beadjusted according to the actual shape of the rotor.

The purpose of BWEs sensor controlled sealing system is to performthe adjustment automatically and continuously.

Being insensitive to fly ash, water, gypsum etc, a major advantageof the inductive position principle is the ability to operate in dirtyenvironments

Measuring Sensor

Measuring sensor devices measure the distance between the sectorplate and the rotor flange continuously. The sensor uses threemagnetic inductive coils installed in a sensor unit. The sensing coilis an open core coil which produces a magnetic flux according tothe distance between the coil and the rotor flange. The reference coilis a closed core coil for temperature compensation. The drive coilgenerates the magnetic field. The coils are able to work continuouslyat temperatures up to 420 C.

Control Panel

The signal from the sensor is amplified and linearized in a transmitterplaced inside the local control panel. The actual distance, as well asthe status of the system, is shown on the screen of the panel and onthe DCS of the plant. The control panel also includes a PLC whichcompares the gap information to a set value and if necessary anactuator will move the sealing plate in order to maintain the correctgap distance.

Active leakage control

Installation of Active Leakage Control in existing

units

By installing Active Leakage Control System in existing Air Preheatersand Gas-Gas Heaters instead of a fixed sealing system or a manuallyadjustable system it is possible to:

reduce the leakage to an absolute minimum

save power consumption for the fans

increase the overall plant efciency


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The BWE soot blower is a multi cleaning media type with a fullyretractable lance. The cleaning media are air (pressure range 6-20 bars)and water (pressure range 80-100 bars).

Advantage of a BWE soot blower:

No shut down periods of main boiler unit due to soot blowermalfunctions

The lance and nozzles can be serviced/repaired/changed while theGas Gas Heater is still in operation

The lance and nozzles are not in contact with the aggressive andabrasive flue gas when the soot blower is in standby-mode

No need for internal lance support structures

BWE Soot Blower for GGH


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Equipment:

All elements in ue gas contact are made of resistant materials,

such as Hastelloy and Teflon

High pressure nozzles provide solid stream (0 degree spread) tosecure an optimal penetration of the narrow space between theheating elements

The seal box is equipped with a labyrinth seal giving the lance alarge freedom of movement

Air knife for lance deposit removal (optional)

Seal air is applied to the seal box and, to avoid clogging of nozzles, tothe high pressure nozzles during low pressure cleaning and to the lowpressure nozzles during high pressure cleaning.

The soot blower operates in a Go-Stop-Go mode which secures a fullcoverage of the rotor surface.


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STFS.p.A.Via Robecco, 2020013 Magenta (MI) ItaliaTel: +39 02 972091Fax: +39 02 9794977

www.stf.ite-mail: [email protected]

BWE

Burmeister & Wain Energy A/SLundtoftegrdsvej 93ADK-2800 Kgs. Lyngby - DenmarkTel: +45 39 45 20 00

Fax: +45 39 45 20 05www.bwe.dke-mail: [email protected]

BWE Energy India Pvt. LtdNo. 43, KB Dasan RoadTeynampetChennai - 600 018TamilNadu, India

Tel: +91 44 24 32 8101/2Fax: +91 44 24 32 8103e-mail: [email protected]

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