Presentation on boilers
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This presentation discusses different types of boilers. A boiler is a vessel that heats water to produce steam or hot water. Boilers work by transferring the heat from hot gases produced by burning fuel to water stored inside the closed vessel. The main types discussed are fire tube boilers, water tube boilers, and package boilers. Fire tube boilers are compact but produce lower pressure steam more slowly, while water tube boilers can produce very high pressure steam more efficiently but are less compact and more expensive. Key factors in selecting a boiler include steam requirements, available space, maintenance needs, and costs.
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The document discusses different types of steam generators or boilers. It begins with an introduction to boilers, then describes how boilers are classified. It provides details on the key differences between fire-tube and water-tube boilers, including their construction, operation, applications and advantages/disadvantages. The document also discusses boiler terms, selection criteria for boilers, essential characteristics of good boilers, and provides details on specific types of fire-tube and water-tube boilers.
Power plant engineering
Boilers produce steam using heat from the combustion of fuel. There are various types of boilers classified based on their orientation, heating method, circulation type, pressure, portability, and number of tubes. Fire tube boilers have hot gases passing through tubes surrounded by water, while water tube boilers have water passing through tubes surrounded by hot gases. Water tube boilers generally have higher steam pressure and production capacity compared to fire tube boilers. Common boiler types discussed in the document include fire tube boilers like Lancashire and locomotive boilers, and water tube boilers like Babcock & Wilcox. Boilers require safety devices like safety valves, water gauges, and pressure gauges.
boilers
Steam generators/boilers convert the chemical energy of fossil fuels into thermal energy, which is then transferred to water to produce high-pressure steam. There are various types of steam generators classified by capacity, pressure, design, and heating surface arrangement. Key boiler types discussed include fire tube boilers, water tube boilers, locomotive boilers, Babcock and Wilcox boilers, and Cochran boilers. Selection of boilers depends on factors like codes and standards, load requirements, number of boilers needed, and special considerations like space and replacement needs.
Boilers and-its-mountings and Boiler accessories
A boiler is defined as "a closed vessel in which water or other liquid is heated, steam or vapor is generated, steam is superheated, or any combination thereof, under pressure or vacuum, for use external to itself, by the direct application of energy from the combustion of fuels, from electricity or nuclear energy."
Boiler accessories are those components which are installed either inside or outside the boiler to increase the efficiency of the plant and to help in the proper working of the plant
Boiler mountings are the machine components that are mounted
over the body of the boiler itself for the safety of the boiler and for
complete control of the process of steam generation.
Various boiler mountings are as under
1) Pressure gauge
2) Water Level Indicator
3) Fusible plug
4)Safety Valve
i) Lever Safety Valve
ii) Spring Loaded safety Valve
5) Steam stop valve
6) Feed check valve
7) Blow off cock
Study of Boilers for Mechanical Engineering
The document discusses steam generators and their components. It describes the primary functions of steam generators as generating steam under pressure while ensuring high purity steam and maintaining steam temperature over a range of loads. It also discusses circulation in drum-type boilers via natural circulation and forced circulation in high-pressure boilers. Key components of steam generators discussed include the furnace, water and steam circuits, and various accessories like economizers, superheaters, and separators.
Boiler definition types applications necessity and fuel used with pdf (1)
Boilers are closed vessels that convert water into steam by heating it under pressure. They are classified based on their circulation method (fire tube or water tube), circulation of water (free or forced), number of tubes, intended use, fuel type, operating pressure, and orientation. Boilers are necessary as the central heating mechanism for buildings, using combustion to generate steam or hot water that is distributed throughout the structure via pumps, radiators, and heat exchangers. They serve essential functions for industrial processes, power generation, and heating applications.
Atd boilers unit 4 ppt
The document discusses steam boilers, their classifications, components, and accessories. It describes how steam boilers work by transferring thermal energy from fuel combustion to water to produce steam. Boilers are classified based on the position of hot gases and water, firing method, steam pressure, circulation method, intended use, and other factors. Examples of specific boiler types like fire tube boilers (Cochran, Lancashire), water tube boilers (B&W, Stirling), and locomotive boilers are explained. Mountings and accessories that provide safety and control of boiler operation are also outlined.
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The document discusses factors affecting boiler selection and types of boilers. It describes key factors like steam output required, working pressure, fuel availability, and cost. Fire tube boilers discussed include Lancashire, Cornish, locomotive, and Cochran. Water tube boilers mentioned are suitable for pressures above 10 bar and output over 7000 kg/hr, such as Babcock & Wilcox and Stirling. Details are provided on Lancashire, locomotive, B&W, and Stirling boiler designs. Mountings, accessories, circulation methods, and high pressure boilers are also covered.
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Presentation on boilers
- 1. PRESENTATION ON BOILERS D.ARUN 148R1A0345
- 2. INTRODUCTION What is a Boiler? vessel that heats water to become hot water or steam At atmospheric pressure water volume increases 1,600 times Hot water steam used to transfer heat to a processes
- 3. PRINCIPLE OF OPERATION The Boiler is essentially a closed vessel inside which water is stored. Fuel is bunt in a furnace and hot gasses are produced. These hot gasses come in a contact with water vessel where the heat of these hot gases transfer to water and consequently steam is produced in the boiler. This steam is piped to the turbine of power plant
- 4. TYPES OF BOILERS Fire Tube Boiler. Water Tube Boilers. Package Boilers. Other Boilers.
- 5. FIRE TUBE BOLIER Relatively small steam capacities(12,000 kg/hr) Low to medium steam pressures(18 kg/cm2) Operates with oil, gas or solid fuels.
- 6. Advantages of fire tube boilers: 1)It is quite compact in construction. 2)Fluctuation of steam demand can be met easily. 3)It is also quite cheap. Disadvantages of fire tube boilers: 1)As the water required for operation of the boilers is quite large, it requires long time for rising steam as desired steam. 2)As the water and steam are in the same vessel the very high pressure of steam is not possible. 3)The steam received from fire tube boiler is not very dry.
- 7. Water Tube Boilers Used for high steam demand and pressure requirements. Capacity range of 4,500-120,000 kg/hr. Combustion efficiency enhanced by induced draft provisions.
- 8. Advantages of water tube boilers: 1)Large heating surface can be achieved by using more number of water tubes. 2)Due to convectional flow, movement of water is must faster than that of fire tube boiler; hence rate of heat transfer Is high which results into higher efficiency. 3)Very high pressure in order of 140 kg/cm2 can be obtained smoothly. Disadvantages of water tube boilers: 1)The main disadvantage of water tube boiler is that it is not compact in construction. 2)Its cost is not cheap. 3)Size is a difficulty for transportation and construction.
- 9. SELECTION OF A BOILERS Working pressure and quality of steam. Steam generation rate. Floor area available Accessibility for repair and inspection. Comparative initial cost. Probable load factor. The fuel and water available. Operating and maintenance cost.