Combined heat and power plant

Combined heat and power plant 

Can be purchased as whole or pieces.

Flue gas turbine (type GT35P) coupled with a pressurized fluidized bed boiler (P200 module of ABB Kraftwerke AG ) for steam generation.

1 high-pressure steam turbine (type G32) and 1 medium/low-pressure steam turbine (type VEE63) for power generation and subsequent heat extraction for the municipal hot water network

2 gas/oil-fired steam boilers (corner-tube boilers) for peak load periods

Maximum output:

74 MWel / 120 MWth (full-load operation with peak-load boilers)

71 MWel / 40 MWth (during periods of low heat output)

62 MWel / 90 MWth (during periods of high heat release)

Operating conditions (full load operation):

Combustion temperature: 800 °C to 850 °C

Pressure: 12 bar

Live steam temperature: 537 °C

Live steam pressure: 144 bar

Fluidized bed lignite demand: 39 t/h

Limestone (for flue gas desulfurization during the combustion process): 0.6 t/h

Quartz sand (for securing the fluidized bed): 0.4 t/h

in total approx. 1.0 t/h sorbent (mixture of limestone and quartz sand)

Ash quantity: approx. 3 t/h

The technology

The pressurized fluidized bed boiler generates steam. The steam is passed through a high-pressure and a medium/low-pressure steam turbine, where it generates electricity. Steam is also extracted from the medium/low-pressure steam turbine for district heating. This steam feeds the hot water network via converter stations. The pressurized fluidized bed boiler also serves as a kind of external combustion chamber for a gas turbine. Similar to ignited gas/air mixtures, the flue gases produced in the furnace drive the flue gas turbine, which generates electricity. In this way, the exhaust gases from the boiler are also used for energy in a highly effective manner.

This is highly efficient because the energy stored in the fuel is optimally utilized: Whereas the efficiency of conventional power plants is around 40 percent, our cogeneration plant achieves an efficiency of up to 70 percent. A benefit for the environment and the quality of life in our region.

Advantages of PFBC technology compared with conventional power plants

By interconnecting flue gas and steam turbines, thermal efficiency is increased by more than 5 percent, which corresponds to fuel savings of about 10 percent. Thanks to in-situ desulfurization with limestone, sulfur emissions can be reduced by up to 98 percent even during combustion.

Low combustion temperature of 850 °C (compared with >1000 °C in conventional power plants) and optimum fuel mixing in the fluidized bed result in

Reduction of thermally formed NOx.

High heat transfer over a small area

Low specific investment costs

Flexible use of fuel

Low content of unburned coal in the process

Find more here - https://www.ucymachines.com/