In a typical bubbling fluidized bed boiler, to what depth is the combustion bed maintained?
a. 1.5 meters
b. 1 meter
c. 2 meters
d. 2.5 meters
e. 3 meters
Answer: B
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Power Engineering Chapter 58
- Which one is NOT a disadvantage of the FBC system?
- Less maintenance is required on the FBC because?
- What is an advantage of the FBC?
- The steam turbine in the PFBC system, about what percentage of power is produced?
- The gas turbine in the PFBC system, about what percentage of power is produced?
- Velocities in the AFBC system through the bed of the fluidizing air are in a range of?
- AFBC has two sub classes which are?
- The AFBC can produce up to ___ kg/h of steam but it will soon increase to ___ kg/h.
- Which one is NOT a disadvantage of the Flue Gas Desulphurization (FGD) system?
- In a fluidized bed boiler, a gradual loss of the fluidized bed, including fuel (carbon) particles, is due to:
- A design disadvantage of a pressurized fluidized bed furnace is:
- Fluidized bed boilers can successfully burn coal with ash contents as high as
- Large "clinkers" are not produced in fluidized bed furnaces because of:
- In order to get maximum heat transfer in a bubbling bed furnace, it is necessary to:
- To effectively remove fine dust from flue gas, the most common method in power plants uses:
- The efficiency of a combined cycle plant, using a pressurized fluidized bed boiler, is about _____ higher than that of a conventional pulverized coal plant.
- In an atmospheric fluidized bed boiler, the combustion air pressure is typically 25 cm of water at the FD fan, 16 cm of water at the base of the active bed and _____ at the top of the combustion mass:
- Due to the comparative size of FBC power plants, a significant saving is gained in:
- In fluidized bed combustion, the fuel content (by mass) in the turbulent material is usually:
- The inert bed material of a fluidized bed boiler must be heated to about __________ °C.
- Limestone, when added to a fluidized bed boiler
- The typical time required to heat a fluidized bed to ignition temperature prior to the introduction of coal is:
- The feed-through tubes of a fluidized bed boiler are located in the:
- One operating variable that is manipulated relatively easily and which the operators of FBC boilers must always be aware, is: