Chapter 2 Flashcards
- A particular application of the once through Boiler design is the steam flooding Boiler. This is a Boiler used for flooding oil wells with steam in order to increase the oil recovery.
A) true
B) false
A) true
- Steam injection is a procedure for increasing the the oil from wells, which have been _____ depleted.
A) completely
B) partially
C) entirely
D) almost
B) partially
- The reason for the use of steam is to allow the maximum quantity of heat to be put into the well with the _____ quantity of injected fluid
A) minimum
B) maximum
C) most
D) super
A) minimum
- In order to keep the salts in the Boiler water dissolved, and to avoid deposits on the tubes, the steam produced contains _____ moisture.
A) 15%
B) 30%
C) 20%
D) 50%
C) 20%
- Outputs from steam flooding boilers range from _____ million kJ/h to _____ million kJ/h in standard sizes.
A) 1, 100
B) 5, 50
C) 100, 200
D) 1, 50
B) 5, 50
- One method of burning _____ is called fluidized bed combustion.
A) liquids
B) wood
C) methane
D) coal
D) coal
- Crushed coal from 1.6 mm to 6 mm is injected into the bed by means of an _____.
A) elevator
B) air stream
C) injector
D) pulverizer
B) air stream
- Combustion air is introduced underneath the bed and is blown through the entire bed.
A) true
B) false
A) true
- Fluidized bed boilers have the ability to burn _____ fuels in an environmentally acceptable manner.
A) low grade
B) high grade
C) liquid
D) vaporized
A) low grade
- Combustion can take place at temperatures ranging from _____ to _____ instead of normal combustion temperatures of 1600 C to 1900 C for pulverized coal and oil firing.
A) 300,500
B) 200,400
C) 800,900
D) 600,700
C) 800,900
- Because of the low operating temperatures, an inexpensive material such as CaCO3 (lime) can be added to the bed. It acts as absorbent to remove _____ from the flue gas.
A) SO2
B) O2
C) NOx
D) water
A) SO2
- Bubbling fluid bed boilers are subject to _____ erosion rates.
A) low
B) moderate
C) extreme
D) high
D) high
- The concept of using waste energy to generate steam has been gaining in popularity. This is mainly because of _____ fuel costs.
A) lower
B) moderate
C) higher
D) more
C) higher.
- A simple combined cycle power generation system can consist of:
A) a single gas turbine generator B) a HRSG C) a single steam turbine generator D) condenser E) all of the above
E) all of the above
- The HRSG has supplemental firing in the form of duct burners. These are coal fired and are used to add additional heat to the boilers.
A) true
B) false
B) false
- The main application for _____ boilers is steam generation using gas turbine exhaust gas as a heat source.
A) fluidized bed
B) HRSG
C) once through
D) steam flooding
B) HRSG
- The kraft process uses sodium sulfide (NaSO4) as a makeup chemical.
A) true
B) false
B) false
- In the black liquor process combustion air is fed at three elevations of the furnace: primary, secondary, and _____.
A) upper
B) lower
C) tertiary
D) after
C) tertiary
- The black liquor droplets must be _____ enough to minimize entrainment in the combustion gases.
A) small
B) large
C) dispersed
D) fine
B) large
- The primary function of the recovery Boiler is to process _____ liquor.
A) white
B) green
C) black
D) liquor
C) black
- List the five functions of the auxiliary fuel burners:
1) raise steam during startup
2) sustain a stable ignition while establishing a char bed
3) stabilize conditions during upsets in the black liquor feed
4) produce extra steam as required by the process of power production
5) burn out the char bed when shutting down
6) maintain furnace temperatures
A) 1,2,3,4,5
B) 3,4,5,6
C) 1,3,5
D) 1,2,3,4,6
A) 1,2,3,4,5
- If water contacts molten smelt, a violent explosion will result. It is not a _____ reaction, but a _____ reaction.
A) chemical, physical
B) physical, chemical
C) violent, mild
D) small, large
A) chemical, physical
- If the black liquor is too _____, it too can result in an explosion.
A) strong
B) thin
C) weak
D) thick
C) weak
- Heat recovery started to be added to the refuse incinerators, as did strict air pollution guidelines. The basic incinerators with waste heat recovery have evolved into _____ boilers with integral stokers.
A) packaged
B) fire tubed
C) open hearth
D) water wall
D) water wall
- The combustion products from burning municipal waste are very _____.
A) hot
B) corrosive
C) many
D) wet
B) corrosive
- There is also corrosion caused by _____ in refuse fired boilers.
A) chlorides
B) fuels
C) materials
D) burning
A) chlorides
- The higher the tube metal temperature, the _____ the degree of tube metal loss.
A) less
B) greater
C) minimum
D) smaller
B) greater
- Corrosion of the _____ furnace area of the Boiler can be severe during refuse firing.
A) upper
B) middle
C) lower
D) recovery
C) lower
- Inconel is an alloy composed mostly of _____ and aluminum.
A) lead
B) copper
C) steel
D) nickel
D) nickel
- Biomass is anything that is or recently was alive, such as leaves, grasses, bamboo, vine clippings, sugar cane, coffee grounds, and rice hulls.
A) true
B) false
A) true
- Systems to burn wood and biomass usually involve a separate _____, called. Dutch oven, or a traveling grate or vibrating grate arrangement.
A) oven
B) furnace
C) collection
D) burner
B) furnace
- The pinhole grates have _____ air holes to admit air to the burning material on the grate.
A) Venturi type
B) square
C) round
D) large
A) Venturi type
- The vibrating grate systems, have grate bars attached to a frame that _____ to remove the ash.
A) rotate
B) move
C) vibrate
D) turn
C) vibrate
- The vibration also serves to aid combustion by _____ out the bed of burning biomass.
A) shaking
B) levelling
C) turning
D) moving
B) levelling
