Fans

Question 1

Why is oil burnt ?

Answer 1

• Boiler light up
• To start a mill
• Support unstable coal fire

Question 2

How are ash and gasses removed

Answer 2

ID fans

Question 3

What is the temperature of the furnace

Answer 3

1277

Question 3

Temperature of the stack

Answer 3

150

Question 3

Temperature of the super heater

Answer 3

1169

Question 3

Tempearture of the air heaters

Answer 3

491 degrees

Question 4

Temperture of the precips

Answer 4

210 degrees

Question 5

Temperature of the convection bank

Answer 5

Convection bank - 942 degrees

Question 6

What does the Regulating vane control damper piston do

Answer 6

Controls the amount of air to the boiler

Question 6

What is the suction temperature of the FD fans ?

Answer 6

0 in winter and 30 degrees in summer

Question 7

What is the outlet temperature of the FD fans and pressure ?

Answer 7

350- 370 and 2.2 kpa in the air heaters

Question 8

What is the pressure of the ID fans

Answer 8

• 0.2 kpa

Question 8

What is the temperature and pressure of the PA fans ?

Answer 8

350- 420 degrees in the air heaters and the pressure is 9kpa

Question 9

What is the temperature after the mixing station

Answer 9

95 degrees

Question 10

Give me the flow of the PA fans

Answer 10

Suction from FD then to inlet damper - outlet
- 1 line taps off to the feeder sealing air
- on the next line ( a line that runs to sootblower cooling air)
- same line to mixing station as cold air
- Same line to primary air heaters then to mixing station
- Hot and cold air control dampers
- Then to venturi
- 2 lines on east and west going to mill A B C D for drying and transport of of

Question 11

Give me the flow of the Fd fans

Answer 11

• Takes suction from the atmosphere through a wire mesh preventing plastics and debris then goes to the outlet damper- secondary air heaters- venturi- secondary control dampers x 8 ( 2 at 10.7 ladder and 2 behind venturi on each side)then to windbox - furnace

Question 12

Give me the standby of the ID Fans

Answer 12

Standby

• Drain valves closed
• Vane air piston on minimum limit postion
• Fan shaft not rotating
• Motorized inlet damper is closed on remote
• Guilotine damper remote and closed
• Guiltine damper is on the top physically
• Fan manhole closed
• All stop buttons of cooling air fan and ID fan released ( 2 and 1)
• Motor and fan bearing vibrations reset
• Motor bearing oil level is 75%
• Lube oil system tank oil level is 75%

Question 13

The Standby of the lube oil system of the fans

Answer 13

The oil pressure controller is on remote and at 150 kpa set point
Inlet and outlet valve of pump is open
isolating valve to bearings are open
The oil level of the tank is 75%

Question 13

Give me the running checks of the ID fans

Answer 13

No oil leaks
RVC damper links not loose
Safety guards are tight
No abnormal bearing temperatures
No abnormal bearing vibration

Question 14

Give me the shutdown and isolation of the ID fans

Answer 14

• Instruction from panel
• Push stop buttons in
• Inlet and outlet dampers closed

Question 15

What will happen without ID Fans

Answer 15

• Less steam produced
• No way to get rid of the ash and gasses

Question 16

The commissioning of the Lube oil system

Answer 16

• Comission oil cooler fan on at the control panel local
• No oil leaks
• Pressure of oil is 150 kpa
• Both pumps on auto- then switch off the pump will auto kickstart standby pump- then switch back to auto

Question 17

What are the normal temperatures of the bearings of the fans

Answer 17

40-65 degrees

Question 17

What are the normal running checks of the lube oil system

Answer 17

Oil level at 75% Oil pressure at 150 kpa No oil leaks

Question 18

What is the abnormal temperatures of the fans

Answer 18

70 degrees

Question 19

What is the normal vibrations and abnormal of the ID Fans ?

Answer 19

40- 80 microns and abormal is 150 and above

Question 20

What is the normal vibrations and abnormal of the FD

Answer 20

40- 60 and 120 and above

Question 21

What is the low low level of tank

Answer 21

30%

Question 21

What is the normal vibrations and abnormal of the PA

Answer 21

40- 50 and 100

Question 22

what is the low level of the tank

Answer 22

70%

Question 23

What are some of the issues of the lube oil system ?

Answer 23

Oil leak on system - bearings damaged - Report to panel Oil temp high - Cooling air fan on, filter IC and heater switched off Low level resovior/ low low - call for top up - Report to spc Diffirential pressure high - change filters Low pressure - Check set point 150 kpa - Check isolating valve is open Bonus: Check inlet and outlet valve is open

Question 24

What are some of the problems of the FD and PA fans ?

Answer 24

- Oil leak on system- make sure sump level is 75% - Oil leak from bearings- Make sure bearing drain valve is closed - Oil temp too high- Make sure cooling water inlet and outlet are open

Question 25

Give the Standby of the FD / PA fans

Answer 25

Drains are closed Stop buttons released manholes closed RVC is on minimum Motorized outlet damper is remote and closed Fan shaft is not rotating Oil levels are at a standing level

Question 26

Give the normal running checks of the FD and PA fans

Answer 26

- No oil leaks - RVC damper links not loose - Safety guards are tight - No abnormal bearing temperatures - No abnormal bearing vibrations

Question 27

What are some of the emergencies of PA and FD fans ?

Answer 27

- Damper links broke - Abnormal temperatures and vibrations