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Technicians Roles In Boilers

 Technicians Roles In Boilers


  • Boiler processes, such as starting, shutdown, lockout, and takeout, and emergency protocols must be understood by technicians. The following methods are general in nature.
  • Before working on their unit, technicians should always refer to the site-specific instructions.

Startup: 

  1. Notify the staff in the control room that the boiler will be turned on.
  2. Examine the boiler's interior using the peepholes to make sure the refractory lining, tubes, and tube supports are all intact and that there is no debris such as scaffold boards, rain suits, or tools within.
  3. Examine the boiler's exterior for any loose flanges around the input and exit pipes. Make sure that the pressure release valve is positioned correctly, the blinds have been removed, and the valves are in their starting positions.
  4. Examine the fuel gas system, the draft fan, and the damper to make sure they are all in good working order.
  5. As per usual operating standards, open the damper and turn on the draft fan while maintaining a constant connection with the staff in the control room.
  6. To ensure the correct water level and to meet the interlock (control safety systems that must be checked prior to the boiler starting), fill the boiler to its usual water level.
  7. Open the pilot gas block valves and the fuel gas supply to the burner after the boiler's draft has stabilized and been purged for the necessary amount of time.
  8. Let the staff in the control room know that the pilot is being it.
  9. As soon as it is verified visually that every pilot has ignited and is burning. Open the primary and secondary air registers. Once every burner is blazing, gradually open each of the main burner block valves one at a time.
  10. Stay in the boiler area to check the flames for appropriate flame patterns and overall system performance (eg : fuel supply and draft fan)
  11. Examine the boiler's inside using the peepholes, making sure that the tubes are all the same color.
Note: an automated control system for a boiler includes several of these processes.

SHUTDOWN:

Boiler shutdown is the opposite of boiler startup, with a few exceptions.
  1. Reduce the load and firing rate gradually.
  2. Shut off the fuel
  3. Close the header valve for steam.
  4. Turn off the feed water pump.
  5. Open the drains and vents.
  6. Turn on the fans to aid with boiler cooling.
When it is safe to block in all of the burners, turn off the fan, and close the damper, the control room operator should keep an eye on the situation and notify the outside operator.

EMERGENCY:

One fuel gas block valve, commonly known as the fireman, is typically selected as the primary shutdown valve in an emergency. Usually, the damper stays open and the draft fan keeps running. The outside operator only stops all pumps, blocks fuel, and blocks burners.

Logout / Tagout for maintenance:

Every business has its own lockout/tagout protocols. Prior to carrying out any maintenance, process specialists need to be conversant with these protocols.

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