#page12 — Public Fediverse posts

#BoilerManual #OptimizingCombustion #Section9 #Page12

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Alt = Labeled at the top as Table 1 Design parameters--coal and coal ash and it's a full page of texts organized into 3 major boxes, then further categorized and subcatagorized to the point that it basically defies alt-text transcription. There is a large box at the top labeled Fuel Characteristics, containing 2 categories labeled Properties of coal substance and Properties of coal ash respectively. Each has a subheader labeled Technological properties and under each of those is an enumerated list of the same. At the bottom of this large box is an arrow pointing to it, which is connected to arrows pointing to the other two boxes laid out below it.

The bottom left box is the next largest of the set, titled Boiler Design and Operation; listed under that are 6 items under which are those items' subdivisions and the best thing to do is to follow the main text regarding these. Off to the right side of this box is a 2-way arrow pointing to itself and the box to the right of it, labeled Sootblower Design and Operation, the smallest of the set and easier to write alt-text for. Like the others, it has an enumerated list of items each with their own subdivision lists.

The items in the smallest box about sootblower design are: 1.Blowing medium; 2.Type of sootblower; 3. Location and spacing of sootblowers {this one has no subdivisions}; Sootblower nozzles; 5. Lance-tube speed; Frequency of blower operation {this item has no subdivisions}. Blowing medium is further subdivided with alphabetic designations, in this order: air or steam; pressure; temperature. Type of sootblower is further divided with alphabetic designations in this order: short retractable; long retractable; fixed position rotating; traveling frame. Sootblower nozzles is further divided with alphabetic designations in this order: type; size; number; angle of attack. Lance-tube speed s further divided with alphabetic designations in this order: rotational; axial.

#BoilerManual #OptimizingCombustion #Section9 #Page12

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Alt = Labeled at the top as Table 1 Design parameters--coal and coal ash and it's a full page of texts organized into 3 major boxes, then further categorized and subcatagorized to the point that it basically defies alt-text transcription. There is a large box at the top labeled Fuel Characteristics, containing 2 categories labeled Properties of coal substance and Properties of coal ash respectively. Each has a subheader labeled Technological properties and under each of those is an enumerated list of the same. At the bottom of this large box is an arrow pointing to it, which is connected to arrows pointing to the other two boxes laid out below it.

The bottom left box is the next largest of the set, titled Boiler Design and Operation; listed under that are 6 items under which are those items' subdivisions and the best thing to do is to follow the main text regarding these. Off to the right side of this box is a 2-way arrow pointing to itself and the box to the right of it, labeled Sootblower Design and Operation, the smallest of the set and easier to write alt-text for. Like the others, it has an enumerated list of items each with their own subdivision lists.

The items in the smallest box about sootblower design are: 1.Blowing medium; 2.Type of sootblower; 3. Location and spacing of sootblowers {this one has no subdivisions}; Sootblower nozzles; 5. Lance-tube speed; Frequency of blower operation {this item has no subdivisions}. Blowing medium is further subdivided with alphabetic designations, in this order: air or steam; pressure; temperature. Type of sootblower is further divided with alphabetic designations in this order: short retractable; long retractable; fixed position rotating; traveling frame. Sootblower nozzles is further divided with alphabetic designations in this order: type; size; number; angle of attack. Lance-tube speed s further divided with alphabetic designations in this order: rotational; axial.

#BoilerManual #Ramping #Section8 #Page12

The boiler master is increased at a constant rate set by the operator at the MW demand station. Throttle pressure should increase linearly with time, as should MW's, as the 201 valves are opened.

Initially, we will plot the boiler master position relative to 201 valve demand, as shown in Figure 6A, then reference the rest of our curves to 201 and 200 valve actions. Point A is the initial condition just prior to opening the 201 valves. When all of the pre-ramp conditions are satisfied the boiler control should be placed on automatic to the MW demand station between points A and B.

At point B, the turbine is manually increased to 6.5% of full load. The boiler follows with a slight increase in the boiler master signal and the 201 valves open to their initial position. The time between points B and C is a stabilization period allowing the system time to settle out after the introduction of flow through the 201's. If the pre-ramp conditions are correct the system will see very little change and the period between B and C will be short.

When the system has stabilized at point C, the turbine is automated and the MW demand station increased to 33% of its full load value. This initiates th actual pressure ramp, and linearly increases the boiler master from point C to E.

The 201 valves are opened from their initial value at point C to their full open position at point D. The demand for the 201 valve is non-linear as shown in Figure 6A, with the demand signal increasing faster toward the end of the ramp than it does early in the procedure. This provides good flow characteristics by causing the actual flow through the 201's to be nearly linear.

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#BoilerManual #Ramping #Section8 #Page12

The boiler master is increased at a constant rate set by the operator at the MW demand station. Throttle pressure should increase linearly with time, as should MW's, as the 201 valves are opened.

Initially, we will plot the boiler master position relative to 201 valve demand, as shown in Figure 6A, then reference the rest of our curves to 201 and 200 valve actions. Point A is the initial condition just prior to opening the 201 valves. When all of the pre-ramp conditions are satisfied the boiler control should be placed on automatic to the MW demand station between points A and B.

At point B, the turbine is manually increased to 6.5% of full load. The boiler follows with a slight increase in the boiler master signal and the 201 valves open to their initial position. The time between points B and C is a stabilization period allowing the system time to settle out after the introduction of flow through the 201's. If the pre-ramp conditions are correct the system will see very little change and the period between B and C will be short.

When the system has stabilized at point C, the turbine is automated and the MW demand station increased to 33% of its full load value. This initiates th actual pressure ramp, and linearly increases the boiler master from point C to E.

The 201 valves are opened from their initial value at point C to their full open position at point D. The demand for the 201 valve is non-linear as shown in Figure 6A, with the demand signal increasing faster toward the end of the ramp than it does early in the procedure. This provides good flow characteristics by causing the actual flow through the 201's to be nearly linear.

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#BoilerManual #BypassSystem #Section7 #Page12

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Alt = Labeled Fig. 4A Startup -- Initial firing. This image is also sideways with the bottom along the right edge and the top along the left edge, and it's like Fig. 3 but with a different valve focus, correspondent to the main text at this point.

#BoilerManual #BypassSystem #Section7 #Page12

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Alt = Labeled Fig. 4A Startup -- Initial firing. This image is also sideways with the bottom along the right edge and the top along the left edge, and it's like Fig. 3 but with a different valve focus, correspondent to the main text at this point.

#BoilerManual #Lighters #Section4 #Page12

Oil Fill

Since solenoid valve 8C has already been energized, pilot air will shift valve 7B (oil fill valve) to the firing position. The oil fill indicator is lit on the local control package. Oil flows from valve 7B through the check valve and orifice to the lighter. Flow though the orifice to empty piping is at a reduced rate. This slow opening action prevents tripping of other lighters (lost of oil pressure) which may be operating from the same main oil supply header.

Oil On

When the oil line to the lighter is full, pressure switch 9E closes, energizing solenoid 8D. The oil on indicating light will be lit on the control package. Pilot air from solenoid 8D shifts valve 7A (oil on valve) bringing the total oil supply to the lighter. When the oil pressure to the lighter reaches 70 psi, pressure switches 9A and 9D close to indicate oil supply to the lighters.

NORMAL SHUTDOWN

During a normal shutdown, the oil is turned off, the oil lines are purged with air, the ignition transformers are de-energized, and the lighters are retracted. Operation of the various valves and switches is as follows. Refer to Figures 8 and 9 for a schematic representation of each sequence.

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#BoilerManual #Lighters #Section4 #Page12

Oil Fill

Since solenoid valve 8C has already been energized, pilot air will shift valve 7B (oil fill valve) to the firing position. The oil fill indicator is lit on the local control package. Oil flows from valve 7B through the check valve and orifice to the lighter. Flow though the orifice to empty piping is at a reduced rate. This slow opening action prevents tripping of other lighters (lost of oil pressure) which may be operating from the same main oil supply header.

Oil On

When the oil line to the lighter is full, pressure switch 9E closes, energizing solenoid 8D. The oil on indicating light will be lit on the control package. Pilot air from solenoid 8D shifts valve 7A (oil on valve) bringing the total oil supply to the lighter. When the oil pressure to the lighter reaches 70 psi, pressure switches 9A and 9D close to indicate oil supply to the lighters.

NORMAL SHUTDOWN

During a normal shutdown, the oil is turned off, the oil lines are purged with air, the ignition transformers are de-energized, and the lighters are retracted. Operation of the various valves and switches is as follows. Refer to Figures 8 and 9 for a schematic representation of each sequence.

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@Su_G #BoilerManual #UnitDescription #Section1 #Page12

18- Windbox - A chamber surrounding the cyclone through which pre-heated air is supplied under

pressure for combustion of the fuel.

{This is all there is on page 12!}

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@Su_G #BoilerManual #UnitDescription #Section1 #Page12

18- Windbox - A chamber surrounding the cyclone through which pre-heated air is supplied under

pressure for combustion of the fuel.

{This is all there is on page 12!}

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