Doosan Lentjes

Doosan Lentjes GmbH
Industry	Energy services
Founded	1927
Headquarters	Ratingen, Germany
Parent	Doosan Group
Website	www.doosanlentjes.com

Doosan Lentjes GmbH is part of Doosan Power Systems S.A., a subsidiary of Doosan Heavy Industries & Construction. It is a specialist engineering, design and construction business that provides proprietary waste-to-energy services and technologies, circulating fluidised bed (CFB) boiler technologies and air quality control systems (AQCS) to the thermal power generation, industrial and municipal sectors.

Doosan Lentjes' main headquarters are in Ratingen, Germany.^[1]

Company products and services

Waste-to-energy

Doosan Lentjes designs and builds processes and technologies for the waste-to-energy sector. Around 77 Doosan Lentjes units are in operation around the world, converting more than 9 million tonnes of waste to energy every year.^[1]

The company specialises in bespoke air and water-cooled grate combustion chamber systems tailored to the precise waste types (volume, calorific value and moisture content) incinerated by the plant. To meet strict emissions requirements, Doosan Lentjes developed the Circoclean® dry flue gas cleaning system, based on fluidised bed technology.

The company also offers precision steam turbines from partner business Doosan Škoda Power. These are capable of operating efficiently at varying levels of heat and steam, to enhance the efficiency of waste-to-energy units. Doosan Lentjes' waste-to-energy projects include:

Delivering boilers for a new waste-to-energy plant in Krakow, Poland (scheduled for completion in 2016). The boiler system will process up to 220,000 tons of municipal solid waste per year to produce both electricity and district heat.^[2]
Supplying and installing the grate, boiler and balance of the Harlingen waste-to-energy plant, which treats municipal and other pre-treated waste for the Dutch province of Friesland (began operating in 2011). Overall process efficiency exceeds 80%.^[3]
Renewing and refurbishing the AVA Frankfurt Nordweststadt four-line waste incineration plant (began operating in 2008). Existing incineration lines were replaced with new ones comprising counter-reciprocating grate incinerators, waste heat boilers and flue gas cleaning systems. The plant generates electricity and supplies North West Frankfurt with thermal energy.^[4]

Circulating fluidised bed (CFB) boilers

Doosan Lentjes designed and built the world's first CFB boiler featuring a fluidised bed heat exchanger (FBHE) in Germany in 1982. The company has produced designs up to almost 300MWe (~700MWth) with a capability of up to 500MWe (~1300MWth). The company's CFB boilers generate power at more than 100 plants around the world.^[5]

Doosan Lentjes is now working in partnership with Doosan Heavy Industries to develop supercritical steam CFB technologies with up to 600MWe of power.

Since mid-2013, Doosan Lentjes has been working with E.ON’s coal-fired Provence power plant in Gardanne, France to convert the existing coal-fired boiler, built and installed by Doosan Lentjes in 1992, into a biomass unit, and to replace the existing steam turbines. The biomass unit will generate electricity from forest chips, green residues and recovered wood and is expected to provide energy for 440,000 households.^[6]

Air quality control systems (AQCS)

Doosan Lentjes develops wet limestone flue gas desulphurisation (FGD), seawater FGD and dry-circulating fluidised bed (CFB) technologies that allow power plants to meet strict emissions targets. It also supplies high and low pressure pulse jet fabric filters, and electrostatic precipitator dedusters.^[7]

At Gheco One power plant, Thailand, Doosan Lentjes designed a seawater FGD system that makes use of seawater from the steam turbine unit. It has been running since 2012.
In 2009, Doosan Lentjes fitted wet limestone FGD plants at Rugeley power station, UK to meet the European Large Combustion Plant Directive requiring a 94% removal rate of sulphurous compounds from flue gases.
Doosan Lentjes has installed over 280 wet FGD units and over 800 dedusting plants internationally.^[7]

History

Year	Points of note
1927	Ferdinand Lentjes founds boiler manufacturing company.
1980	Company acquires Burmeister & Wain A/S, steam generation specialists.
1982	Company designs, builds and commissions the world’s first commercial CFB boiler.^[5]
1984	Company acquires Gottfried Bischoff GmbH, flue gas desulphurisation technology specialists.
1985	Company acquires Standardkessel GmbH, boiler specialists.
1990	Former Metallgesellshaft acquired Lentjes GmbH.
1992	Lurgi AG fluidised bed activities, Lentjes GmbH and Deutsche Babcock Energietechnik GmbH amalgamate to form LLB Lurgi Lentjes Babcock Energietechnik GmbH. Boiler activities, flue gas desulphurisation activities and miscellaneous technologies amalgamate to form Lurgi Lentjes AG.
2005	Lurgi Lentjes AG is renamed Lentjes GmbH.
2007	Lentjes GmbH is acquired by AE&E to form AE&E Lentjes.
2011	AE&E Lentjes is sold to Korea’s Doosan Group to form Doosan Lentjes GmbH.

References

1 2 "Waste to Energy" (PDF). Doosan Lentjes. Doosan Power Systems. 2013. Retrieved 18 November 2013.
↑ Messenger, Ben (21 February 2013). "Doosan Boiler System Waste to Energy Plant in Poland". Waste Management World. Retrieved 18 November 2013.
↑ "Doosan Power Systems puts collaboration at the heart of Harlingen". Waste Management World. Retrieved 18 November 2013.
↑ "Waste to Energy Excellence -- Frankfurt". Doosan Lentjes. Retrieved 18 November 2013.
1 2 "Doosan Babcock Oil, Gas and Petrochemical" (PDF). Doosan Lentjes. Doosan Power Systems Ltd. 2013. Retrieved 18 November 2013.
↑ "Doosan secures major boiler and turbine project for France's largest biomass power plant". Renewable Energy Focus. Retrieved 18 November 2013.
1 2 "Air Quality Control Systems" (PDF). Doosan Lentjes. Doosan Power Systems. 2013. Retrieved 18 November 2013.

External links

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