References in this market
The EDP Group is present in Portugal with around 7 thousand employees.
The company is the main investor in Portugal and one of the engines of the economy and national development, being the largest producer, distributor and trader of electricity in the country.
The production of energy in Portugal takes place through hydro and thermal generation (ex: EDP Produção) and wind generation (ex: EDP Renováveis). EDP Distribuição is the Distribution Network Operator in the mainland of Portugal. The sale of energy takes place through EDP Serviço Universal (regulated market) and EDP Comercial (free market).
Challenge: In April 2008, EDP Produção launched an international tender for the Project, Construction, Supply, Installation and Commissioning of the new Cogeneration Plant, Natural Gas, from Barreiro.
The deadline for establishing the first parallel with the electricity network was 31 December 2019, the date from which the existing Cogeneration Plant would cease to operate.
The main technical challenge was the requirement to guarantee the instant production of 50T/h of steam, even without the two turbines in operation.
Solution adopted: Using as main equipment two different Kawasaki Gas Turbines – model GPB 180D and model GPB 80 – together charging about 24 MWe and two identical Energest® Recovery Boilers, together charging about 40,7 MWt in the form of steam.
The Energest® recovery boilers that were designed and built, are of the aquatubular type, of natural circulation with the gases in a horizontal path, with superheater steam at 21.5 bar, using the gases of exhaust from gas turbines, but also being equipped with “air vein” burners, which can operate in post-combustion or “fresh air” mode. The basic configuration adopted for the Evaporator was the “I – Frame Evaporator” type. Thanks to our experience in the boiler design using the “Corner Tube Boiler” concept, we found that an adaptation of this concept to the basic construction solution (“I FRAME”), would allow to obtain additional and mechanical point of view.
The “air vein” combustion system uses a Reburnflam® burner developed by “Pilliard Combustion” and designed to operate in the “Post-Combustion” or “Fresh Air” modes with a turn-down of 1/14.
To allow the nominal production of steam with the respective Gas Turbine inactive, each burner has an atmospheric air insufflation system.
Each Turbine / Boiler group has a main, self-stable chimney, 24 meters high and 2500 mm in diameter.
Of the various equipments that make up to the BOP of the plant, we also highlight the Energest® Thermal Deaerator with a deaeration capacity of 50 T/h , with a 45 m3 degassed water tank.
The control and automation system is made up of several power and command cabinets that allow you to manage the Recovery Boilers and all complementary and auxiliary equipment.
The commissionig took place on December 29, 2009, wich allowed our client to ensure the continuity of the supply of steam to Fisipe, without any interruption.
The Transfradelos Group was born more than 30 years ago and has its main activity in transport and logistics operation.
With the experience gained in biomass logistics for the main Portuguese paper companies, it eventually entered the pellet production business through tec pellets.
With the acquisition of Probiomass to the Proef Group, it was licensed to build and exploit a forest biomass thermoelectric power plant with the possibility of injection into the network up to 11MWe.
With the knowledge and experience gained in the development of biomass projects we proposed, in partnership with the Canadian company KMW Energy, a solution distinct from that usually adopted in similar projects.
We divided the project into two lines, each consisting of a combustion chamber with refrigerated mechanical grille, a recovery boiler, economizer, multicyclone and induced run fan.
At the end both lines are routed to a single electrostatic filter and from there to a common chimney.
The Steam Generator System was sized for nominal production of 55 000 kg/h of overheated steam, at a pressure of 63 bar and 486ºC.
From the project we highlight the following auxiliary and complementary equipment:
- Compressed air system
- Water treatment system
- Energest thermal deaerator® 50 T/h
- Ash extraction system
- Gas analysis system
- Electrostatic filter Scheuch
- Self-stable chimney 20 meters high and 2500 mm in diameter
- Turbine lubrication oil cooling system
- Command and Control System
- Supervision System.
The Thermoelectric Power Plant took place at the end of 2017.