What Are Advantages Of Unit (or) Direct System Of Pulverized Fuel Firing?

What Are Advantages Of Unit (or) Direct System Of Pulverized Fuel Firing?
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1 Answer

Answer :

1. The layout is simple and economical
2. It gives direct control of combustion
3. Coal transportation system is simple
4. Maintenance cost is less
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Related questions

Name The Two Methods Of Pulverized Fuel Firing System?

Description : Name The Two Methods Of Pulverized Fuel Firing System?

Last Answer :  Unit (or) direct system.  Bin (or) central system.

What Is The Difference Between Stocker Firing And Pulverized Fuel Firing?

Description : What Is The Difference Between Stocker Firing And Pulverized Fuel Firing?

Last Answer : The stocker firing method is used for firing solid coal where as pulverized firing method is used for firing pulverized coal.

What Are The Advantages Of Forced Draught System?

Description : What Are The Advantages Of Forced Draught System?

Last Answer :  Since the fan handles cold air, the fan size and the power required are less.  No need of water cooled bearings because the air being handled is cold air,  Pressure throughout the system is above atmospheric pressure so the air leakage into the furnace is reduced.

Define The Term Natural Draught And What Are The Advantages Of Natural Draught System?

Description : Define The Term Natural Draught And What Are The Advantages Of Natural Draught System?

Last Answer : The tall chimney creates the natural draught by the temperature difference between hot gases in the chimney and cold atmospheric air outside the chimney. The advantages are:  No external power is required ... at high level.  No maintenance cost.  Capital cost is less than artificial draught.

What Are The Waste Materials, Which Can Be Used For Fuel For Power Generation?

Description : What Are The Waste Materials, Which Can Be Used For Fuel For Power Generation?

Last Answer :  Municipal waste.  Industrial waste.  Paper waste.  Rubber waste.

What Are The Advantages Of Gas Cooled Reactor Nuclear Power Plant?

Description : What Are The Advantages Of Gas Cooled Reactor Nuclear Power Plant?

Last Answer : 1. Fuel processing is simple. 2. The use of C02 as coolant completely eliminates the possibility of explosion in reactor. 3. No corrosion problem.

State Some Advantages Of Pressurized Water Reactor?

Description : State Some Advantages Of Pressurized Water Reactor?

Last Answer :  The pressurized water reactor is compact  In this type, water is used as coolant; moderator and reflector water is cheap and available in plenty)  It requires less number of control rods.

What Are The Advantages Of Sodium In Fast-breeder Reactors?

Description : What Are The Advantages Of Sodium In Fast-breeder Reactors?

Last Answer :  Sodium has very low absorption cross-sectional area.  It possess good heat transfer properties at high temperature and low pressure.  It does not react with any of the structural materials used in primary circuits.

What Are The Advantages Of Breeder Reactors?

Description : What Are The Advantages Of Breeder Reactors?

Last Answer :  It gives high power density than any other reactor.  High breeding is possible.  High burn-up of fuel is achievable.  The operation of the reactor is not limited by Xe poisoning.

What Are The Advantages Using Co2 As Coolant?

Description : What Are The Advantages Using Co2 As Coolant?

Last Answer :  Gases do not react chemically with the structural materials.  Gas can attain any temperature for a particular pressure.  They do not absorb neutron.  The leakage of gas will not affect the reactivity.  The gas coolant provides best neutron economy.

What Are The Advantages Of Hyperbolic Natural-draft Cooling Towers?

Description : What Are The Advantages Of Hyperbolic Natural-draft Cooling Towers?

Last Answer :  Since no fans are used power cost and auxiliary equipments cost is reduced.  Hyperbolic tower chimney creates its own draft even when there is no wind.  Ground fogging and warm air re-circulation are avoided in hyperbolic towers.  The structure is more or less self-supported.

What Are The Advantages Of Induced Draft Cooling Tower Over Forced Draft Cooling Tower?

Description : What Are The Advantages Of Induced Draft Cooling Tower Over Forced Draft Cooling Tower?

Last Answer : 1. The outlet water comes in contact with the driest air and warmest water comes in contact with most humid air. 2. The re-circulation is seldom a problem. 3. The first cost is low due to the reduction in pump power consumption.

State Some Advantages Of Fluidized Bed Boilers?

Description : State Some Advantages Of Fluidized Bed Boilers?

Last Answer :  Any type of fuel solid, liquid (or) gaseous fuel (or) domestic and industrial waste can be used in FBC system. Any type of combustible matter can be burned by adjusting the factors as size ... .  High combustion efficiency.  The solid fuel need not be pulverized in fluidized bed boilers.

State Some Advantages Of Regeneration Cycle?

Description : State Some Advantages Of Regeneration Cycle?

Last Answer :  Heat supplied to boiler becomes reduced.  Thermal efficiency is increased since the average temperature of heat addition to the cycle is increased.  Due to bleeding in the turbine, erosion of turbine due to moisture is reduced.

What Are The Important Advantages Of Re Heating?

Description : What Are The Important Advantages Of Re Heating?

Last Answer :  Due to reheating, network done increases.  Heat supply increases.  Thermal efficiency increases.  Due to reheating, the turbine exit dryness fraction increases so moisture decreases so blade erosion becomes minimum so life of the turbine will be increased.

Write About Benson Boiler? State Some Important Advantages Of Benson Boiler?

Description : Write About Benson Boiler? State Some Important Advantages Of Benson Boiler?

Last Answer : Benson boiler is the high pressure, vertical fire tube boiler. This boiler has no drum and is ~designed to operate at critical pressure of 225 bars. Benson boiler has no drum. So the total ... reduced by 20%, when compared to other boilers. The erection of Benson boiler is easier and quicker.

State Important Advantages Of High-pressure Boilers?

Description : State Important Advantages Of High-pressure Boilers?

Last Answer :  The amount of scale formation is less, since the velocity of water through pipes are more.  All parts of the system are heated uniformly, so there is no danger of overheating.

Why Ash Handling System Is’ Needed?

Description : Why Ash Handling System Is’ Needed?

Last Answer :  To remove the ashes from the furnace ash hopper.  To transport the ashes from furnace ash hopper to a storage.  To dispose the ashes from the storage.

How The Ash Handling System Is Classified?

Description : How The Ash Handling System Is Classified?

Last Answer : 1. Mechanical handling system 2. Hydraulic system 3. Pneumatic system 4. Steam jet system

Why The Balanced Draught System Is Preferred Than Other System?

Description : Why The Balanced Draught System Is Preferred Than Other System?

Last Answer : In the induced draught system, when the furnace is opened for firing, the cold airs enters the furnace and dilate the combustion. In the forced draught system, when the furnace is opened for ... which is a combination of induced and forced draught, is used to overcome the above stated difficulties.

Write About Forced Draught System?

Description : Write About Forced Draught System?

Last Answer : In this system, the blower (forced draft fan) is located at the base of the boiler near the grate. Air is forced to the furnace by forced fan and the flue gases are forced to chimney through economizer and air preheater.

What Consists Of Lubrication System In Diesel Engine Power Plant?

Description : What Consists Of Lubrication System In Diesel Engine Power Plant?

Last Answer : The lubrication system consists of oil pumps, oil tanks, filters, coolers and connecting pipes. The purpose of the lubrication is to reduce the friction of moving parts and also pipes to reduce the wear and tear of moving parts.

What Is The Function Of Cooling System In Diesel Power Plant?

Description : What Is The Function Of Cooling System In Diesel Power Plant?

Last Answer : The function of cooling system is to remove heat from the engine cylinder to keep the temperature of the cylinder in low range and extend engine life.

State advantages of Pulverized coal w.r.t. thermal power plant.

Description : State advantages of Pulverized coal w.r.t. thermal power plant. 

Last Answer : Advantages of Pulverized coal w.r.t. thermal power plant.  1. Due to pulvarization amount of fuel required to produce same amount of heat reduces. 2. Time required for combution reduces ... of air and thorough mixing of air and fuel, very high-combustion temperatures can be attained.

Name The Coolants Commonly Used For Fast Breeder Reactors?

Description : Name The Coolants Commonly Used For Fast Breeder Reactors?

Last Answer :  Liquid metal (Na (or) Na K)  Helium (He)  Carbon dioxide.

What Is Breeding In Nuclear Reactor?

Description : What Is Breeding In Nuclear Reactor?

Last Answer : The process of producing fissionable material from a fertile material such as uranium 238 (U 238) and thorium 232 (Th 232) by neutron absorption is known as breeding.

Name The Different Components Of Nuclear Reactor?

Description : Name The Different Components Of Nuclear Reactor?

Last Answer : 1. Nuclear fuel 2. Moderator 3. Control rods 4. Reflectors 5. Reactor vessel 6. Biological shielding 7. Coolant

What Is Meant By Nuclear Fission?

Description : What Is Meant By Nuclear Fission?

Last Answer : Uranium exists in different isotopes of U 238, tP34 and U 235. Out of these, EP35 is most unstable. When unstable heavy nucleus is bombarded with high-energy neutrons, it splits up roughly ... neutrons are released and a large amount of energy is produced. This process is called nuclear fission.

What Are The Different Types Of Load Acting On The Chimney?

Description : What Are The Different Types Of Load Acting On The Chimney?

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What Is The Purpose Of Control Rods?

Description : What Is The Purpose Of Control Rods?

Last Answer : The control rods are used to start the chain reaction, maintain the chain reaction at required level and to shut down the reactor during emergency.

What Is The Working Principle Of Magneto Hydrodynamic Power Plant?

Description : What Is The Working Principle Of Magneto Hydrodynamic Power Plant?

Last Answer : The working principle of MHD is as like that of dynamo. Instead of solid conductor high temperature plasma is passed through the magnetic field at sonic speed. When the gas is passed through magnetic field, current is induced. Electrodes collect this induced current.

Name The Different Types Of Mhd Generators?

Description : Name The Different Types Of Mhd Generators?

Last Answer :  Open cycle MHD  Closed cycle MHD  Closed cycle MHD with liquid metal

What Are The Demerits Of Breeder Reactor?

Description : What Are The Demerits Of Breeder Reactor?

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Name Few Types Of Reactors?

Description : Name Few Types Of Reactors?

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What Are The Desirable Properties Of A Coolant?

Description : What Are The Desirable Properties Of A Coolant?

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Description : What Are The Desirable Properties Of A Good Moderator?

Last Answer :  It must be as light as possible It must slow down the neutron as quick as possible.  It must have resistance to corrosion.  It must have good machinability.  It must have good conductivity and high melting point.

Define Fertile Materials And Breeding In Reactors?

Description : Define Fertile Materials And Breeding In Reactors?

Last Answer : There are materials like U 235 and Th232 which are not fissile but can be converted into fissile materials by the bombardment of neutrons. Such materials are known as fertile materials. The process of converting more fertile material into fissile material in a reaction is known as breeding.

Define Multiplication Factor Of A Fission Process?

Description : Define Multiplication Factor Of A Fission Process?

Last Answer : k =number of neutrons of any one generation/number of neutrons of immediately preceding generation.

What Are The Requirements To Sustain Fission Process?

Description : What Are The Requirements To Sustain Fission Process?

Last Answer :  The bombarded neutrons must have sufficient energy to cause fission.  The number of neutrons produced must be able to create the rate of fission.  The fission process must generate energy.  The fission process must be controlled.

Write About Isotopes Of An Element?

Description : Write About Isotopes Of An Element?

Last Answer : Some elements have the same number of protons in the nucleus but different number of neutrons. As a result, these elements have the same atomic number but different mass number. Such type of elements ... mass numbers due to different number of neutrons, are known as in the isotopes of an element.

Write About Atomic Number?

Description : Write About Atomic Number?

Last Answer : The nucleus contains protons and neutrons. The number of protons in a given atom is an atomic number (Z). The atomic number for H is 1 and He is 2.

What Is The Need Of Depreciation Cost?

Description : What Is The Need Of Depreciation Cost?

Last Answer : Depreciation cost is the amount to be set aside per year from the income of the plant to meet the depreciation caused by the age of service, wear and tear of the machinery and equipments. Depreciation amount collected every year helps in replacing and repairing the equipment.

What Includes Operating Cost?

Description : What Includes Operating Cost?

Last Answer : Operating cost includes the following cost.  Cost of fuel  Cost of operating labour,  Cost of maintenance labours and materials.  Cost of supplier like Water for feeding boilers, for condenser and for general use.  Lubrication oil and, grease.  Water treatment chemicals.

What Includes Fixed Cost?

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Last Answer : Fixed cost includes the following cost. 1. Cost of land 2. Cost of building 3. Cost of equipment 4. Cost of installation 5. Interest 6. Depreciation cost 7. Insurance 8. Management cost

Define Load Factor?

Description : Define Load Factor?

Last Answer : Load factor is defined as the ratio of average load to the peak load (or) maximum demand.

Define Load Curve?

Description : Define Load Curve?

Last Answer : Load curve is a graphical representation between load in kW and time in hours. It. shows variation of load at the power station. The area under the load curve represents the energy generated in a particular period.

Define Demand Factor?

Description : Define Demand Factor?

Last Answer :  Demand factor is defined as the ratio of maximum demand to connected load.  Connected load is the sum of ratings in kW of equipment installed in the consumer’s premises.  Maximum demand is the maximum load, which a consumer uses at any time.

State The Objective Of Boiler Trial?

Description : State The Objective Of Boiler Trial?

Last Answer :  To determine the thermal efficiency of the boiler when working at a definite pressure.  To draw up heat balance sheet for the boiler to check the performance of the boiler.

What Is Meant By Boiler Trial?

Description : What Is Meant By Boiler Trial?

Last Answer : Steam is generated in boilers under certain conditions of feed water and exists as steam while a certain amount of fuel is burnt. To study the performance of boiler, some experiments are conducted by ... for a certain length of time and recording the data. This procedure is known as boiler trial.

Write About Boiler Mountings?

Description : Write About Boiler Mountings?

Last Answer : The devices used for the efficient operation, proper maintenance, and safe operation boiler mountings. The different boiler mountings are: 1. Water gauge (or) water level indicator 2. Pressure gauge (or) steam gauge 3. Safety valves 4. Fusible plug 5. Stop valve 6. Blow off cock 7. Feed check valve.