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#BoilerManual #AirAndGasFlow #Section3 #Page32
{page is missing, Fig 27, so I'm repeating the previous page's image as a placeholder til the missing page is located.}
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#BoilerManual #AirAndGasFlow #Section3 #Page32
{page is missing, Fig 27, so I'm repeating the previous page's image as a placeholder til the missing page is located.}
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#BoilerManual #FluidCirculation #Section2 #Page32
Superheating Surfaces
Two PSH supply downcomers (located at the rear of the unit) feed into mix bottles and the PSH inlet header. From the PSH inlet header, the steam enters the PSH tube banks, which are enclosed within the horizontal convection pass. Flow is up through the PSH tube banks to the PSH outlet header. The fluid is mixed in the outlet header so that temperatures are equalized and then is sent through two connecting pipes, generally referred to as crossover lines. These lines extend upward outside of the unit and enter the penthouse where they crossover and feed the steam from the right half of the PSH to the left half of the SSH {Secondary SuperHeater} outlet headers. The two paths join in the mainstream line and is sent to the high pressure (HP) stage of the turbine at approximately 1005 F and at a full load pressure of approximately 2620 psi. Both pressure and temperature are reduced in the turbine.
The steam is discharged into the SSH outlet headers. The two path join in the main stream line and is sent to the high pressure (HP) stage of the turbine at approximately 1005 F and at a full load pressure of approximately 2620 psi. Both pressure and temperature are reduced in the turbine.
Low pressure steam from the turbine flows back to the reheat superheater (RSH) through the cold reheat lines and enters the RSH inlet header located beneath the convection pass enclosure header (Figure 21). It then flows through the reheat tubes (horizontal and pendant) and on to outlet headers. From the reheat outlet headers, the steam is returned to the turbine through the hot reheat lines at a full load temperature of 1005 F and a pressure of 519 psi. It then flows through the intermediate and low pressure stages of the turbine from which it is exhausted to the condenser.
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#BoilerManual #FluidCirculation #Section2 #Page32
Superheating Surfaces
Two PSH supply downcomers (located at the rear of the unit) feed into mix bottles and the PSH inlet header. From the PSH inlet header, the steam enters the PSH tube banks, which are enclosed within the horizontal convection pass. Flow is up through the PSH tube banks to the PSH outlet header. The fluid is mixed in the outlet header so that temperatures are equalized and then is sent through two connecting pipes, generally referred to as crossover lines. These lines extend upward outside of the unit and enter the penthouse where they crossover and feed the steam from the right half of the PSH to the left half of the SSH {Secondary SuperHeater} outlet headers. The two paths join in the mainstream line and is sent to the high pressure (HP) stage of the turbine at approximately 1005 F and at a full load pressure of approximately 2620 psi. Both pressure and temperature are reduced in the turbine.
The steam is discharged into the SSH outlet headers. The two path join in the main stream line and is sent to the high pressure (HP) stage of the turbine at approximately 1005 F and at a full load pressure of approximately 2620 psi. Both pressure and temperature are reduced in the turbine.
Low pressure steam from the turbine flows back to the reheat superheater (RSH) through the cold reheat lines and enters the RSH inlet header located beneath the convection pass enclosure header (Figure 21). It then flows through the reheat tubes (horizontal and pendant) and on to outlet headers. From the reheat outlet headers, the steam is returned to the turbine through the hot reheat lines at a full load temperature of 1005 F and a pressure of 519 psi. It then flows through the intermediate and low pressure stages of the turbine from which it is exhausted to the condenser.
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