COMBINED CYCLE 303 MWE PLANT WITH A 265 MWE CIRCULATING FLUIDISED BED BOILER (CENTRALE DE PROVENCE) [PHASE 1]

Cel

To develop a combined cycle linking the world biggest circulating fluidised bed boiler (600 Mwth) fed with run-of-mine coal and a gas turbine the exhaust of which will be used for feed water heating.
The innovative parts concern :
The extrapolation of data already acquired on CFB generators of lower capacity will lead to the conception of the present generator using shapes proportional to and with numbers of specific elements directly resulting from those necessary in CFB boilers of 125 MWe. The single boiler furnace will be of a record size for a CFB. 4 cyclones and 4 outside beds will complete this unit. The project will constitute the necessary technological stage towards the design of even larger CFB generators.
Also, in the present case, exhaust gas from a gas turbine will replace the bleed steam which is normally used for feed water heating. This layout will increase the efficiency of producing electrical power.

This project consists of the construction and setting into operation of a circulating fluidised bed boiler in the Provence power plant of Gardanne in France, together with a gas turbine, the exhaust gas sensible heat from which will be used for reheating boiler feed water, is replacing the bleed steam from the turbo-generator of 250 MWe which is linked to it.
Main characteristics of boiler
Operating conditions
Steam output 700 t/h
Superheated steam pressure 163 bars
Superheated steam temperature 565 deg. C
Steam pressure to reheat 39,5 bars
Reheated steam pressure 36,5 bars
Reheated steam temperature 565 deg. C
Fuel input 149 t/h average
Up to this present day a generator of such a size, fired using a circulating fluidised bed does not exist. Extrapolation to this capacity taking into account the proposers acquired experience leads the following :
- a single furnace of a sizenot yet existing but including in its lower part two fluidization grates of a geometry comparable with the biggest existing boilers.
- four separation cyclones of such a diameter that one can determine with safety the performances.
- four external fluid bed heat exchangers, two of which are assigned to superheating and reheating with adjustment of steam temperature by adjusting the flow of solids through them, and two others assigned to maintain the ideal temperature of the furnace whatever the boiler load.
In addition the project foresees feed water heating in the boiler by means of a waste heat recovery boiler on the gases issued from a gas turbine, integrated into the supply system. These gases take the place of the average and low pressure bleed steam from "groupe 4" turbo-generator.
The thermal characteristics of the gas turbine and waste heat boiler are the following :
a) gas turbine
- gross output : 38,4 MWe
- auxiliary consumption : 0,12 MWe
- natural gas flow : 140 Mwth
b) recovery boiler
- an economizer (low pressure) 28,1 Mwth
- an economizer (high pressure) 36,1 Mwth

Program(-y)

ENG-THERMIE 1 - Programme (EEC) for the promotion of energy technology in Europe (THERMIE), 1990-1994

Temat(-y)

7.4 - PRESSURIZED FLUIDIZED BED COMBUSTION

Zaproszenie do składania wniosków

Data not available

System finansowania

DEM - Demonstration contracts

Koordynator

EDF/CDF

Wkład UE

Brak danych

Adres

2 RUE LOUIS MURAT
75008 PARIS
Francja

Koszt całkowity