Boiler Introduction & Classification
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This presentation discusses boilers, which produce steam using heat from fuel combustion. Boilers are classified based on their orientation, whether they have fire or water tubes, furnace location, circulation method, pressure rating, mobility, and number of tubes. Key types include fire tube boilers like Cochran and Lancashire models, and water tube boilers such as Babcock and Wilcox. Selection depends on required steam properties, capacity, cost, and other factors. Proper boiler design considers safety, accessibility, efficiency, and other criteria.
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Water and fire tube boilers
Boilers produce steam using heat from fuel combustion. Water tube boilers have tubes that carry water and shells that carry hot gases, allowing for higher steam pressures and capacities than fire tube boilers which have tubes that carry hot gases and shells that carry water. Key components of boilers include shells, burners, drums, furnaces, safety valves, and feed pumps. Boilers are classified by their tube configuration and common types include water tube, fire tube, and vertical or horizontal orientations. Water tube boilers have advantages over fire tube in steam generation speed, capacity, efficiency and maintenance access.
Boiler
1. A steam generator or boiler is a closed vessel made of steel that transfers heat from fuel combustion to water to generate steam.
2. Boilers should be safe, accessible for maintenance, efficient in absorbing heat, simple in construction, and have low initial and maintenance costs.
3. There are many types of boilers classified by factors like the contents in tubes (fire tube or water tube), furnace position, and circulation method. Proper consideration of factors like steam needs, area, and costs is important for boiler selection.
High pressure boilers
This document summarizes information about high pressure boilers. It begins with classifications of boilers, including definitions and examples of high pressure boilers like Lamont and Benson boilers. Key features of high pressure boilers are forced circulation, small diameter tubes, and higher steam pressure and temperature. The document also describes boiler mountings, accessories, feedwater treatment, draught systems, chimney design considerations, and provides an example boiler heat balance sheet.
Ppt on boilers
This presentation provides an overview of boilers. It defines a boiler as a vessel that heats water to produce hot water or steam. The presentation describes the basic principle of operation where hot gases produced from burning fuel transfer heat to water inside the boiler vessel. It then discusses the main types of boilers, including fire tube and water tube boilers, and describes their key characteristics and differences. Examples are given of commonly used boiler designs like Babcock and Wilcox, pulverized fuel, and fluidized bed boilers. Factors for selecting an appropriate boiler based on requirements are also summarized.
Steam boiler
Steam boilers are closed vessels that produce steam from water through fuel combustion. They are used to power steam engines and turbines or for heating. Key boiler components include the shell, furnace, and mountings. Accessories like economizers and superheaters improve efficiency. Boilers require safe containment of water and delivery of steam at the desired pressure and quality. Common boiler terms are defined and the purposes of accessories and mountings like pressure gauges and fusible plugs are described.
Economiser & air preheater
An economiser is a device that increases the temperature of feed water using waste heat from flue gases leaving the boiler. It consists of vertical cast iron or steel pipes through which feed water flows and is heated by hot flue gases passing over the pipes. This preheats the feed water, reducing fuel consumption and increasing boiler efficiency. However, economisers also cause a pressure drop in flue gases. An air preheater similarly uses waste heat to preheat combustion air entering the furnace, improving combustion and efficiency but requiring forced draught.
Boiler Presentation
This document provides information about boilers, including:
1. It defines what constitutes a boiler according to Indian law and defines related terms like boiler components and steam pipes.
2. It describes the basic systems that make up a boiler system, including the water treatment, fuel supply, air supply, and flue gas systems.
3. It lists different types of fuels that can be used in boilers and describes the main types of boilers, including fire tube, water tube, packaged, stoker fired, pulverized fuel, waste heat, and fluidized bed boilers.
BOILER DRAUGHT
Boiler draught refers to the pressure difference between the air inside a boiler furnace and the outside air, which causes the flow of air and flue gases through the boiler. This pressure difference is necessary for proper combustion of fuel and removal of flue gases. Draught can be produced naturally through the use of a chimney, or artificially through mechanical fans or steam jets. Forced draught uses a fan before the furnace to push air and gases through, while induced draught uses a fan at the chimney to pull gases through. Balanced draught combines the two. Mechanical draught allows better control of the pressure but has higher costs than natural or steam jet draught.
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Water and fire tube boilers
Boilers produce steam using heat from fuel combustion. Water tube boilers have tubes that carry water and shells that carry hot gases, allowing for higher steam pressures and capacities than fire tube boilers which have tubes that carry hot gases and shells that carry water. Key components of boilers include shells, burners, drums, furnaces, safety valves, and feed pumps. Boilers are classified by their tube configuration and common types include water tube, fire tube, and vertical or horizontal orientations. Water tube boilers have advantages over fire tube in steam generation speed, capacity, efficiency and maintenance access.
Boiler
1. A steam generator or boiler is a closed vessel made of steel that transfers heat from fuel combustion to water to generate steam.
2. Boilers should be safe, accessible for maintenance, efficient in absorbing heat, simple in construction, and have low initial and maintenance costs.
3. There are many types of boilers classified by factors like the contents in tubes (fire tube or water tube), furnace position, and circulation method. Proper consideration of factors like steam needs, area, and costs is important for boiler selection.
High pressure boilers
This document summarizes information about high pressure boilers. It begins with classifications of boilers, including definitions and examples of high pressure boilers like Lamont and Benson boilers. Key features of high pressure boilers are forced circulation, small diameter tubes, and higher steam pressure and temperature. The document also describes boiler mountings, accessories, feedwater treatment, draught systems, chimney design considerations, and provides an example boiler heat balance sheet.
Ppt on boilers
This presentation provides an overview of boilers. It defines a boiler as a vessel that heats water to produce hot water or steam. The presentation describes the basic principle of operation where hot gases produced from burning fuel transfer heat to water inside the boiler vessel. It then discusses the main types of boilers, including fire tube and water tube boilers, and describes their key characteristics and differences. Examples are given of commonly used boiler designs like Babcock and Wilcox, pulverized fuel, and fluidized bed boilers. Factors for selecting an appropriate boiler based on requirements are also summarized.
Steam boiler
Steam boilers are closed vessels that produce steam from water through fuel combustion. They are used to power steam engines and turbines or for heating. Key boiler components include the shell, furnace, and mountings. Accessories like economizers and superheaters improve efficiency. Boilers require safe containment of water and delivery of steam at the desired pressure and quality. Common boiler terms are defined and the purposes of accessories and mountings like pressure gauges and fusible plugs are described.
Economiser & air preheater
An economiser is a device that increases the temperature of feed water using waste heat from flue gases leaving the boiler. It consists of vertical cast iron or steel pipes through which feed water flows and is heated by hot flue gases passing over the pipes. This preheats the feed water, reducing fuel consumption and increasing boiler efficiency. However, economisers also cause a pressure drop in flue gases. An air preheater similarly uses waste heat to preheat combustion air entering the furnace, improving combustion and efficiency but requiring forced draught.
Boiler Presentation
This document provides information about boilers, including:
1. It defines what constitutes a boiler according to Indian law and defines related terms like boiler components and steam pipes.
2. It describes the basic systems that make up a boiler system, including the water treatment, fuel supply, air supply, and flue gas systems.
3. It lists different types of fuels that can be used in boilers and describes the main types of boilers, including fire tube, water tube, packaged, stoker fired, pulverized fuel, waste heat, and fluidized bed boilers.
BOILER DRAUGHT
Boiler draught refers to the pressure difference between the air inside a boiler furnace and the outside air, which causes the flow of air and flue gases through the boiler. This pressure difference is necessary for proper combustion of fuel and removal of flue gases. Draught can be produced naturally through the use of a chimney, or artificially through mechanical fans or steam jets. Forced draught uses a fan before the furnace to push air and gases through, while induced draught uses a fan at the chimney to pull gases through. Balanced draught combines the two. Mechanical draught allows better control of the pressure but has higher costs than natural or steam jet draught.
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it also differenciate between water tube boiler and fire tube boiler.
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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.
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This document discusses the classification of boilers. Boilers can be classified based on their geometric orientation as either vertical or horizontal. They can also be classified based on the position of water and hot gases as either fire tube boilers, where water surrounds the tubes that carry hot gases, or water tube boilers, where tubes carry water and are surrounded by hot gases in a furnace. Boilers are also classified based on their pressure range as either high, medium, or low pressure boilers and whether they are stationary or mobile.
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1. Isentropic compression in a pump
2. Constant pressure heat addition in a boiler
3. Isentropic expansion in a turbine
4. Constant pressure heat rejection in a condenser
It also discusses deviations from the ideal cycle, such as non-ideal pump and turbine efficiencies. Methods to increase cycle efficiency include lowering the condenser pressure, increasing steam superheating, and raising the boiler pressure. Advanced cycles like reheat and regeneration are also mentioned to further improve performance.
Draught and chimney
Natural draught is produced by a chimney and provides ventilation for boiler systems. The height and diameter of a chimney can be calculated based on factors like flue gas temperature, ambient temperature, and air-fuel ratio. For maximum discharge of hot gases, the flue gas temperature should be slightly higher than ambient temperature. Chimneys provide advantages like no external power requirements but have limitations like low efficiency below 1%. Boiler performance is quantified by equivalent evaporation and efficiency, which allow standardization based on feed water temperature and pressure.
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This document provides an overview of boilers, including their classification, components, and applications. It discusses:
- The basic function of boilers is to produce steam using the thermal energy released from fuel combustion.
- Boilers can be classified based on their tube layout (fire tube vs water tube), axis, furnace location, application, pressure, and water circulation. Common types discussed include fire tube (Cochran, Lancashire), water tube (B&W, Stirling), and locomotive boilers.
- Key requirements for boilers include safety, accessibility, sufficient capacity, efficiency, low cost/maintenance, and ease of starting. Applications include power generation, heating, and industrial processes.
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This document discusses the reversed Carnot cycle, which is used in Carnot refrigerators and heat pumps. It consists of four processes: 1) adiabatic compression, 2) isothermal compression, 3) adiabatic expansion, and 4) isothermal expansion. This cycle operates in the counterclockwise direction on a temperature-entropy diagram. It is the most efficient refrigeration cycle possible between two temperature levels, as it achieves the highest theoretical coefficient of performance. However, it cannot be practically implemented due to the different speeds required for the adiabatic and isothermal processes.
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The document discusses cooling towers, including:
1. Types of cooling towers like natural draft, mechanical draft, forced draft, induced draft, cross flow and counter flow towers.
2. Parameters for assessing cooling tower performance including range, approach, effectiveness and cooling capacity.
3. Energy efficiency opportunities like selecting an appropriately sized tower, using efficient fill media to reduce pumping needs, and optimizing fans and motors.
Introduction of Boiler
A boiler is a closed vessel that heats water or another fluid. Boilers are constructed from low-carbon steel and have corrugated furnaces for strength. On ships, steam is used for heating, powering turbines, pumps, and other machinery. There are different types of boilers classified by their orientation, circulation method, pressure rating, and whether water or hot gases pass through 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. Packaged boilers are self-contained and efficient units that produce steam quickly.
Thermodynamic cycles
This document discusses several thermodynamic cycles:
- The Carnot cycle consists of two reversible adiabatic and two reversible isothermal processes.
- The Stirling cycle has the same four processes as the Carnot cycle. It has the highest theoretical efficiency but is expensive to make.
- The Diesel cycle consists of isentropic compression, constant-pressure heating, isentropic expansion, and constant-volume heat rejection. Diesel engines have an efficiency around 40% while turbocharged engines reach 50%.
- The Rankine cycle uses a steam engine with isentropic pumping, constant pressure heat addition, isentropic expansion in a turbine, and constant pressure heat rejection. It has a maximum Car
boiler & classification of boiler
A boiler is a closed vessel that produces steam from water through fuel combustion. Boilers are classified based on whether the water or hot gases pass through tubes, the water circulation method, furnace location, intended use, orientation, and capacity. Fire tube boilers have combustion gases passing through tubes surrounded by water. Water tube boilers have smaller diameter tubes containing water surrounded by combustion gases, allowing higher pressures over 2000 psi.
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This document discusses steam condensers and their types. It defines a condenser as a device that condenses steam to water using cooling water. There are two main types - jet condensers and surface condensers. Jet condensers mix steam and cooling water directly, while surface condensers separate them with a heat transfer wall. The document classifies condensers in various ways and describes the functions, elements, advantages and disadvantages of different condenser types. It also discusses vacuum creation, sources of air leaks, and the effect of condenser pressure on thermal efficiency.Critical thickness of insulation
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It define what is boiler, type of boiler and boiler mounting, etc.
it also differenciate between water tube boiler and fire tube boiler.
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Hey! that's the simple presentation about boiler which is presented by Ansal university student Sujan kharel...
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.
Boiler & It's Types
Boilers are most important part of Chemical Industry. 99 % boilers used in Pakistan Chemical Industries are water tube boilers because of their high efficiency and safety. So we should have clear understanding about the boilers.
Classification of boiler
This document discusses the classification of boilers. Boilers can be classified based on their geometric orientation as either vertical or horizontal. They can also be classified based on the position of water and hot gases as either fire tube boilers, where water surrounds the tubes that carry hot gases, or water tube boilers, where tubes carry water and are surrounded by hot gases in a furnace. Boilers are also classified based on their pressure range as either high, medium, or low pressure boilers and whether they are stationary or mobile.
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Rankine cycle
The document describes the Rankine cycle, which is a vapor power cycle that can be practically implemented. It discusses the ideal Rankine cycle process of:
1. Isentropic compression in a pump
2. Constant pressure heat addition in a boiler
3. Isentropic expansion in a turbine
4. Constant pressure heat rejection in a condenser
It also discusses deviations from the ideal cycle, such as non-ideal pump and turbine efficiencies. Methods to increase cycle efficiency include lowering the condenser pressure, increasing steam superheating, and raising the boiler pressure. Advanced cycles like reheat and regeneration are also mentioned to further improve performance.
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Natural draught is produced by a chimney and provides ventilation for boiler systems. The height and diameter of a chimney can be calculated based on factors like flue gas temperature, ambient temperature, and air-fuel ratio. For maximum discharge of hot gases, the flue gas temperature should be slightly higher than ambient temperature. Chimneys provide advantages like no external power requirements but have limitations like low efficiency below 1%. Boiler performance is quantified by equivalent evaporation and efficiency, which allow standardization based on feed water temperature and pressure.
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This document provides an overview of boilers, including their classification, components, and applications. It discusses:
- The basic function of boilers is to produce steam using the thermal energy released from fuel combustion.
- Boilers can be classified based on their tube layout (fire tube vs water tube), axis, furnace location, application, pressure, and water circulation. Common types discussed include fire tube (Cochran, Lancashire), water tube (B&W, Stirling), and locomotive boilers.
- Key requirements for boilers include safety, accessibility, sufficient capacity, efficiency, low cost/maintenance, and ease of starting. Applications include power generation, heating, and industrial processes.
Reversed carnot cycle
This document discusses the reversed Carnot cycle, which is used in Carnot refrigerators and heat pumps. It consists of four processes: 1) adiabatic compression, 2) isothermal compression, 3) adiabatic expansion, and 4) isothermal expansion. This cycle operates in the counterclockwise direction on a temperature-entropy diagram. It is the most efficient refrigeration cycle possible between two temperature levels, as it achieves the highest theoretical coefficient of performance. However, it cannot be practically implemented due to the different speeds required for the adiabatic and isothermal processes.
Cooling towers
The document discusses cooling towers, including:
1. Types of cooling towers like natural draft, mechanical draft, forced draft, induced draft, cross flow and counter flow towers.
2. Parameters for assessing cooling tower performance including range, approach, effectiveness and cooling capacity.
3. Energy efficiency opportunities like selecting an appropriately sized tower, using efficient fill media to reduce pumping needs, and optimizing fans and motors.
Introduction of Boiler
A boiler is a closed vessel that heats water or another fluid. Boilers are constructed from low-carbon steel and have corrugated furnaces for strength. On ships, steam is used for heating, powering turbines, pumps, and other machinery. There are different types of boilers classified by their orientation, circulation method, pressure rating, and whether water or hot gases pass through 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. Packaged boilers are self-contained and efficient units that produce steam quickly.
Thermodynamic cycles
This document discusses several thermodynamic cycles:
- The Carnot cycle consists of two reversible adiabatic and two reversible isothermal processes.
- The Stirling cycle has the same four processes as the Carnot cycle. It has the highest theoretical efficiency but is expensive to make.
- The Diesel cycle consists of isentropic compression, constant-pressure heating, isentropic expansion, and constant-volume heat rejection. Diesel engines have an efficiency around 40% while turbocharged engines reach 50%.
- The Rankine cycle uses a steam engine with isentropic pumping, constant pressure heat addition, isentropic expansion in a turbine, and constant pressure heat rejection. It has a maximum Car
boiler & classification of boiler
A boiler is a closed vessel that produces steam from water through fuel combustion. Boilers are classified based on whether the water or hot gases pass through tubes, the water circulation method, furnace location, intended use, orientation, and capacity. Fire tube boilers have combustion gases passing through tubes surrounded by water. Water tube boilers have smaller diameter tubes containing water surrounded by combustion gases, allowing higher pressures over 2000 psi.
Types of Refrigerants
This document discusses refrigerants used in refrigeration systems. It begins by defining primary and secondary refrigerants, with primary refrigerants able to be used directly in the system and secondary refrigerants used for indirect heat transfer. Refrigerants are then classified based on their working principles, safety considerations, and chemical compositions. Designation conventions are described for naming halocarbon and non-halocarbon refrigerants. Desirable properties of refrigerants are outlined, including thermodynamic, chemical, physical, safety, and economic criteria. Common refrigerants and their environmental impacts are also mentioned.
Condenser and its types
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This document discusses steam condensers and their types. It defines a condenser as a device that condenses steam to water using cooling water. There are two main types - jet condensers and surface condensers. Jet condensers mix steam and cooling water directly, while surface condensers separate them with a heat transfer wall. The document classifies condensers in various ways and describes the functions, elements, advantages and disadvantages of different condenser types. It also discusses vacuum creation, sources of air leaks, and the effect of condenser pressure on thermal efficiency.Critical thickness of insulation
It is basic information about what is critical thickness and why we should we know this. Then there is critical thickness formula for cylindrical pipe and spherical shell.
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Boiler(Introduction,classification and it's types) by sujan kharel
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Es question bankimportant question related to GTU exam
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This document contains a question bank for an Environmental Studies course. It includes questions related to renewable and non-renewable resources, water resources, food and forest resources, water pollution, air pollution, land pollution, noise pollution, energy resources, and global environmental problems. Many questions ask students to differentiate between various concepts, explain specific environmental issues, or discuss causes and effects. The document also includes a definitions section with short descriptions of 65 environmental terms.Peningkatan daya saing industri tekstil melalui konservasi energi bppt (full)
This document discusses energy conservation in the textile industry through integrated energy management approaches. It outlines Indonesia's national energy conditions and textile industry energy usage. Energy audits are presented as an important part of energy management to identify conservation opportunities by evaluating energy usage patterns and inefficiencies. A systematic approach to energy management is recommended over a conventional approach through long-term commitment, planning, control, monitoring and making conservation a company culture.
Boiler Water Treatment
The document discusses boiler feed water chemistry. It describes various impurities found in water sources and different pre-treatment methods to remove them, such as clarification, filtration, ion exchange and degasification. It also covers internal boiler water treatment using chemicals like soda ash and phosphates to precipitate dissolved salts and prevent scaling. Maintaining proper water chemistry parameters and controlling corrosion is important for boiler reliability and efficiency.
Babcock & wilcox
This document summarizes a Babcock & Wilcox boiler. It provides a brief history of the boiler, noting that Stephen Wilcox and George Herman Babcock patented the first non-explosive boiler using water-filled tubes in 1867. The boiler generates steam at pressures above 10 bar and capacities higher than 7,000 kg/hr. It has a very high steam generation capacity between 2,000 to 40,000 kg/hr and allows for easy replacement of defective tubes while requiring less space than fire-tube boilers.
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This document discusses different types of boilers, including water tube boilers and fire tube boilers. It provides classifications of boilers based on factors like the relative position of hot gases and water, method of firing, and pressure of steam. Specific boiler types are described, such as the Cochran, Lancashire, and Babcock & Wilcox boilers. High pressure boilers like the Benson and Lamont boilers are also summarized. The key differences between fire tube and water tube boilers are outlined.
A Seminar On Boiler
It is about the boiler And its component.Here i describe about boiler ,its invention history And many other topics.
Cochran Boiler
The document describes the Cochran boiler, a type of fire-tube boiler. It has a cylindrical shell with a hemispherical firebox and fire tubes. Coal is burned on a grate at the bottom of the firebox, producing hot gases that enter horizontal fire tubes and transfer heat to the surrounding water. The steam produced then exits through an anti-priming pipe at the top of the shell. Key features include a large heating surface area, natural circulation, and the ability to easily meet fluctuating loads due to its large reservoir. However, it is limited to a maximum working pressure of 16 bars and requires more floor space due to brick lining.
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Es question bankimportant question related to GTU exam
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Peningkatan daya saing industri tekstil melalui konservasi energi bppt (full)
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Boiler Introduction & Classification
- 1. A PRESENTATION ON BOILER BY: Arpit Modh (16BCH035) B.Tech Chemical Nirma University, Ahmedabad.
- 2. BOILER Boiler is an apparatus to produce steam. Thermal energy released by combustion of fuel issued to make steam at the desired temperature and pressure. The steam produced is used for: 1. For generating power in steam engines or steam turbines. 2. Heating the residential and industrial buildings. 3. Performing certain processes in the sugar mills, chemical and textile industries.
- 3. Selection of boiler: The working pressure & quality of steam. Steam generation. Floor area available. Accessibility for repair & inspection. Comparative initial cost. The fuel & water available. Operating & maintenance cost.
- 4. BOILER PROPERTIES a) Safety: The boiler should be safe under the operating conditions. b) Accessibility: the various part of boiler should be accessible for repair & maintenance. c) Capacity: Should be capable of supplying Steam according to the requirements. d) Efficiency: Should be able to absorb a maximum amount of heat produced due to burning of fuel in the furnace. e) It should be simple in construction. f) Its initial cost and maintenance cost is low. g) It should be capable of quick starting and loading.
- 5. CLASSIFICATION OF BOILERS The boiler may be classified as : 1. According to geometric orientation 2. According to relative position of water and hot gases 3. According to location of furnace 4. According to method of water circulation 5. According to working pressure 6. According to mobility of boiler 7. According to number of tubes in boiler
- 6. 1. According to geometric orientation If the axis of boiler is horizontal, the boiler is called horizontal. e.g. Lancashire boiler If the axis is vertical then it is called vertical. e.g. Cochran boiler If the axis is inclined then it is called inclined.
- 7. According to relative position of water and hot gases In the fire tube boiler the hot gases are inside the tubes & the water surrounds in the tube. e.g.Cochran, Lancashire In the water tube boiler the water is inside the tube & the hot gases are surround them. e.g. Babcock and Wilcox boiler 2.
- 8. 1. FIRE TUBE BOILERS
- 9. 2. WATER TUBE BOILERS
- 10. 3. According to location of furnace The boiler is known as externally fired if the fire is outside the shell. e.g. Babcock & Wilcox In case of internally fired boilers, the furnace is located inside the boiler shell. e.g. Cochran, Lancashire
- 11. 4. According to method of water circulation In forced circulation type of boilers the circulation of water is done by forced pumps. In natural circulation type of boiler the circulation of water in boiler takes place due to natural convention. ex. Lancashire, Babcock and Wilcox
- 12. 5. According to working pressure The boilers which produce steam at pressure of 25 bar and above are called high pressure boiler. e.g. Babcock and Wilcox The boiler which produce steam at pressure between 10 to 25 bar are called medium pressure boiler. e.g. Lancashire The boiler which produce steam at pressure between 3.5 to 10 bar are called low pressure boiler. e.g. Cochran
- 13. 6. According to mobility Stationary boiler: The boiler cannot be transported easily from one place to another place. e.g. Lancashire, Babcock and Wilcox Mobile boiler: It is portable boiler and can be easily transported. e.g. Locomotive
- 14. 7. According to number of tubes in the boiler Single tube boiler: This boiler having only one fire or water tube for circulation of water or hot gases. e.g. Cornish boiler Multi tube boiler: This boiler having two or more fire or water tubes for the circulation of water or hot gases. e.g. Cochran, Lancashire, Babcock and Wilcox boiler