Boiler Start Up & Shutdown

The purpose of an internal boiler inspection is to ensure that the boiler is filled with scale, oil , debris and other foreign materials.

• True

• False

With respect to the start up preparation of a boiler, which of the following is not typically checked?

• Distribution piping

• Feedwater system

• The Boiler itself

• Fuel & Draft system

When new refractory has been installed in a boiler, the furnace has to be 'boiled out' before raising the furnace to normal operating conditions.

• True

• False

Which of the following is NOT an area of major attention when starting up a boiler?

• Obtaining stable ignition

• Bringing boiler up to normal operating conditions

• Preparing & pressurizing steam headers

• Monitoring wastewater quality

Which is the correct sequence of steps with respect to boiler ignition?

• 1. Furnace pre-purge 2. Reducing air flow

  3. Main burner ignition

  4. Pilot burner ignition

• 1. Reducing air flow

  2. Furnace pre-purge

  3. Pilot burner ignition

  4. Main burner ignition

• 1. Reducing air flow

  2. Furnace pre-purge

  3. Main burner ignition

  4. Pilot burner ignition

• 1. Furnace pre-purge

  2. Reducing air flow

  3. Pilot burner ignition

  4. Main burner ignition

After ignition and during the warm up of a boiler, the firing rate is usually increased on automatic mode.

• True

• False

Steam headers must be warmed up properly to prevent thermal stress and to produce condensate.

• True

• False

Which of the following is NOT a typical chemical used in 'boil out'?

• Detergent

• Soda Ash

• Sulphuric acid

• Trisodium Phosphate

In a long term shutdown of a boiler, a boiler is usually shutdown for a period beyond 14 days.

• True

• False

In a dry layup, all the water from the boiler must be drained, boiler must be washed and flushed to remove all sludge from the water side and the water side of unit must be completely dry.

• True

• False