Write About Forced Draught System?

Write About Forced Draught System?
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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.
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Related questions

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.

Write About Artificial Draught?

Description : Write About Artificial Draught?

Last Answer : In modem power plants, the draught should be flexible to meet the fluctuating loads and it should be independent of atmospheric conditions. To achieve this, the aid of draft fans becomes must and by employing the draft fans, the height of the chimney would be reduced.

Write About Classification Of Draught?

Description : Write About Classification Of Draught?

Last Answer : Draught is classified as: 1. Natural draught 2. Artificial draught The artificial draught is further classified as:  Steam jet draught  Mechanical draught  Induced draught  Forced draught

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.

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.

How The Atmospheric (or) Natural Draught Cooling Towers Are Classified?

Description : How The Atmospheric (or) Natural Draught Cooling Towers Are Classified?

Last Answer : In atmospheric (or) natural cooling towers, the natural air provides the required cooling without the use of fans. This is classified into three types: 1. Natural draft spray filled towers. 2. Natural draft packed type towers. 3. Hyperbolic cooling towers.

How The Induced Draught Is Working?

Description : How The Induced Draught Is Working?

Last Answer : In an induced draught system, a blower (induced draft fan) is placed near (or) at the base of the chimney. The fan sucks the flue gas from the furnace creating a partial vacuum inside the ... aid the combustion of fuel. The flue gases drawn by the fan passes through chimney, to the atmosphere.

Define Draught, What Is The Use Of Draught In Thermal Power Plants?

Description : Define Draught, What Is The Use Of Draught In Thermal Power Plants?

Last Answer : Draught is defined as a small pressure difference required between the fuel bed (furnace) and outside air to maintain constant flow of air and to discharge the gases through chimney to the atmosphere ... To draw the combustion products through the system. To remove burnt products from the system

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.

Define Forced Draft And Induced Draft Cooling Towers?

Description : Define Forced Draft And Induced Draft Cooling Towers?

Last Answer : If the fan is located at the bottom of the tower and air is blown by the fan up through the descending water it is called as forced draft cooling towers. If the fan is located at the top of the ... on the tower's side and drawn up and discharge through the fan casing, it is called as induced draft.

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.

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.

Write About Co2 Recorders?

Description : Write About Co2 Recorders?

Last Answer : In thermal power plants, it is necessary to keep the concentration Of CO2 is low is necessary as possible. To achieve this, a constant recording of concentration Of CO2 These recorders ... different principles, as given below.  Thermal conductivity cell  Chemical absorption cell  Density balance

Write About Screw Conveyor And Bucket Conveyors?

Description : Write About Screw Conveyor And Bucket Conveyors?

Last Answer : In screw conveyor, an endless helicoids screw is fitted to the shaft. On one end of the shaft, the driving mechanism is fitted and the other end of the shaft is supported on a ball bearing. While ... as vertical lifts. The coal is loaded at the bottom and unloaded at the top in the bucket conveyors.

Write About In Plant Handling Of Coal?

Description : Write About In Plant Handling Of Coal?

Last Answer : In order to handle large quantity of coal inside the plant, some mechanical handling systems are provided f6r smooth, easy and better controlled operation. The implant coal handling is divided, into following categories.  Coal unloading  Coal preparation  Coal transfer  Coal storage

Write About Out Plant Handling?

Description : Write About Out Plant Handling?

Last Answer : Out plant handling includes the handling of coal mine to the thermal power plant. These handlings are outside the plant in the following ways.  Transportation by sea (or) river  Transportation by rail  Transportation by road  Transportation of coal by pipeline.

Write About Fluidized Bed Boilers?

Description : Write About Fluidized Bed Boilers?

Last Answer : When the high velocity gas is passed through a packed bed of finely divided solid particles, the particles become suspended in the gas stream and the packed bed becomes a fluidized bed. When ... Bed Combustion. The boiler plant using this fluidized bed combustion is known as fluidized bed boilers.

Write About Waste Heat Boilers?

Description : Write About Waste Heat Boilers?

Last Answer : The waste heat boilers use the waste heat in gases coming out of diesel engines and gas turbines at high temperature (or) use the waste as a fuel in the incineration. Some boilers use the industrial dirty gases for power generation.

Write About Loeffler Boiler?

Description : Write About Loeffler Boiler?

Last Answer : The major disadvantage in La Mont boiler is the deposition of salt and sediment on the inner surface of the water tubes. It reduces the heat transfer and ultimately the steam generating capacity. ... by preventing water from flowing through the boiler tubes. The steam is generated outside the tubes.

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.

Write About La Mont Boiler? What Is The Major Disadvantage Of La Mont Boiler?

Description : Write About La Mont Boiler? What Is The Major Disadvantage Of La Mont Boiler?

Last Answer : La Mont boiler is a forced circulation high pressure water tube boiler. The major disadvantage is the formation of bubbles, salt and sediment on the inner surfaces of the heating surfaces. This reduces the heat flow and steam generation.

Write About Prime Movers?

Description : Write About Prime Movers?

Last Answer : Prime mover converts the kinetic energy of water into mechanical energy to produce electrical energy. Pelton wheel, turbine, Francis turbine, Kaplan turbine and Propeller turbine are prime movers used in hydraulic power plants.

Write the elements of forced draught cooling tower.

Description : Write the elements of forced draught cooling tower.

Last Answer : Following are the elements of forced draught cooling tower; a) Forced draught fan b) Eliminator c) Spray header d) Spray nozzle e) Circulating pump

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

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

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

Last 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

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 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.

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.

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.

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?

Last Answer : Its own weight which is considered to act on single vertical force acting through the centroid The wind pressure, which is considered to act on the horizontal force acting on the centroid of vertical projected area.

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 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 Demerits Of Breeder Reactor?

Description : What Are The Demerits Of Breeder Reactor?

Last Answer :  Highly enriched fuel is required  Control is difficult and expensive  Safety must be provided against melt down  Handling of sodium is a major problem

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.

Name Few Types Of Reactors?

Description : Name Few Types Of Reactors?

Last Answer : Fast reactors, Thermal reactors, natural fuel reactors, Enriched Uranium reactors, water moderated reactors, heavy water moderated reactor, graphite moderated reactor, gas cooled reactors and Sodium cooled reactors.

What Are The Desirable Properties Of A Coolant?

Description : What Are The Desirable Properties Of A Coolant?

Last Answer :  It should not absorb neutron  Have high chemical and radiation stability  Non-corrosive  Have high boiling point  Non-toxic

What Are The Desirable Properties Of A Good Moderator?

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.