Power
Power Capacity
6 MW--WHR Based
14MW-- FBC Based
The proposed plant shall be configured with 3 nos of Waste Heat Recovery Boilers (WHRB) of capacity of 10 TPH each Boiler operating at 67 kg/cm2 and 485±5°C
The balance steam for generating the rated power will be generated by one nos. of Fluidized Bed Combustion Boiler (AFBC) using Coal and Char of capacity 80 TPH operating at 67 kg/cm2 and 485±5°C. |
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 The proposed one 20 MW Steam Turbine shall have one uncontrolled extraction connected to one constant pressure detector normally working at 125°C feed water temperature.
The steam generated in the boilers would be sufficient to generate 20.0 MW of power.
The feed water system of Boilers is sized to support the installed capacity of boilers to enable 20 MW power generation.
One induced draft RCC counter flow Cooling Tower with three cells of adequate capacity to meet the design operating point of the proposed CPP is envisaged
1 x 15 m3/hr rated flow capacity single stream fully manual operated outdoor type DM plant is envisaged for the proposed CPP.
All electrical equipment will conform to relevant IS/IEC standards and recommendations of IEEE standards.
One centralized Control System is envisaged for the operation of major equipment (Boiler, STG, CW System) in the plant and other auxiliary systems (Compressors and DM plant) shall be operated from their relay based local control panels/stations.
The steam at required parameter to STG would be provided through a main steam header. All Boilers will be connected to this main steam header. The variation in the steam generation of WHRB will vary in line with the variation in the hot gas parameters and its flow. As discussed above, the total steam requirement for 20 MW power generation, as per the suppliers of turbine and generator, shall be minimum 80 TPH operating at 67 kg/cm2 and 485±5°C. Therefore, the heat energy available from 300 TPD DRI kilns feeding to 3X10 TPH capacity WHRB boilers & one 80 TPH capacity FBC boiler will be sufficient for generating sufficient steam to run 20 MW turbine and generator. As per the standard practice and efficiency ratio of turbines clubbed with generation system, the average steam requirement for generation of 1 MW works out to 4 TPH with specified temperature and pressure of steam, as such each of the boilers (WHRB & FBC) have been selected with higher rated capacities for the reasons elaborated below-
Most of the power generated is to be consumed by the melt shop & rolling sections of the unit and to ensure continuous power supply to these sections, even if DRI plant is completely shut down, FBC boiler will generate adequate power to feed both melt shop & rolling mill.
The rotary kilns in the DRI section will be subjected to regular annual maintenance at different intervals, so that at least two of the kilns are always operational and generating adequate heat to feed WHRB boilers connected to it and providing minimum 20 TPH of steam for turbine/generator. |
