Difference between fire tube boiler and water tube boiler scribd. The older fire tube boiler design, in which the water surrounds the heat source and gases from combustion pass through tubes within the water space, is a much weaker structure and is rarely used for pressures above 2. Fabrication of pilot multitube firetube boiler designed. They are differ from not only structure, but also usage. Assessment of factors affecting boiler tube lifetime in. As reported by yates 1999 somewhere between 8% and 12% of fire tube boilers in the uk have been found to be affected. Fire tube boiler 1800 the fire tube boiler, the oldest design, is made so the products of combustion pass through tubes surrounded by water in a shell. Smoke tube boiler and water tube boiler are the main types of industrial boiler in global market. Cracking in firetube boilers at welded joints is a frequent, costly and potentially dangerous occurrence.
The details difference between water tube boiler and fire tube boiler as below. Demerits of water tube boiler over fire tube boiler. These types of boiler are generally considered safer than fire tube designs and typically require less frequent maintenance. The major factor that determines the heat transferred is the heat transfe. Those aspects are operating pressure, passage of material type in tubes, rate of steam generation, handling of load fluctuation, floor area requirement, efficiency, operator skills, design, maintenance cost are listed below in the tabular form. Thank you for listing out the differences of fire tube boilers and water tube boilers.
According to the flow of water and hot gases, a boiler is classified in to fire tube boiler and water tube boiler. May 19, 2015 this is the list of the main components in the fire tube boiler. Different pipeline designs from the various fire tube boilers, are to maximize the heat absorption of the combustion gases. The vix series can offer higher efficiencies than standard vertical boilers. While everything has two sides, a water tube boiler has its advantages and disadvantages when using in industries. It is a single phase pass boiler, which means that the hot gases pass just through the horizontal tube stack before going to the exhaust. Advantages and disadvantages of water tube boilerszbg. Manufacturers of other boiler types, such as vertical, watertube and cast iron sectional boilers, have used the bhp output rating as a means of comparison with firetube boilers. A boiler nothing but a heat exchanger wherein a hot fluid flue gas supplies heat to the cold fluid water such that it evaporates. A vertical firetube boiler or vertical multitubular boiler is a vertical boiler where the heating surface is composed of multiple small firetubes, arranged vertically these boilers were not common, owing to drawbacks with excessive wear in service.
The tubes connect to a steam drum and a mud drum, and steam is produced in the upper drum. Where as in fire tube boilers hot gases from combustion travels through the tubes. In the literature, a comprehensive modeling for fire tube boilers has not been treated. Fire tubes boilers advantages and disadvantages modbusbacnet. Mar 26, 2016 from the perspective of heat transfer. There are two main boiler types that people can choose from for their specific application. This video contains the difference between fire tube boiler and water tube. Difference between fire tube boiler and water tube boiler thermodyne engineering systems free download as pdf file.
The difference between water tube boiler and fire tube boiler is from the boiler structure, water tube boiler is which the have lots of tubes in boilers, the water go through from tubes. The 316l stainless steel fire tube heat exchanger is more resistant to corrosion in comparison to typical copper or aluminum heat exchangers. This video briefly describe fire tube boiler and water tube boiler. Advantages and disadvantages of water tube boilers over fire tube boilers. Conclusion boilers are classified into fire tube or water tube boilers depending on whether the heat source is inside or outside the tubes. The hot gases produced in the furnace then passes through. Of the two, water tube boilers contain wider range than fire tube boilers and they are applied widely in industries.
What is the difference between water tube boiler and fire. A boiler is the most important component in a thermal power plant. In this work, the modeling of the heat transfer between flue gas and water in a firetube boiler is considered. Normal efficiency of the fire tube boiler is about 80 to 85 % but this can be increase or decrease by using different a accessories. The more common form of vertical boiler, which was very similar in external appearance, instead used a single flue and waterfilled. Failure analysis of the boiler waterwall tube is presented in this work.
Firetube boilers are also used in steam locomotives. Jan 11, 2018 steam locomotive, naval ships, and early models of cars, became the most sophisticated models of fire tube boiler transportation in that period. I was always unsure of the difference but this helps a lot, thank you. Watertube boilers are most commonly rated or sized in pounds per hour pph of steam they produce.
Smoke tube boiler, as its name suggests, of which smoke or heat flowing through boiler tubes and the water surrounds outside of the tubes to be heated and turned into steam. A fire tube boiler is a type of boiler in which hot gases pass from a fire through one or many more tubes running through a sealed container of water. Fire tube boiler parts explained learn about the working. The firetube boiler passes combustion gas inside a series of tubes surrounded by water in a vessel to produce steam, while a watertube. Hence water tube boilers can quickly generate steam at the required pressure than the fire tube. As reported by yates 1999 somewhere between 8% and 12% of fire tube boilers in the uk have been found to. Competitive exam questions for mechanical engineers mechanical engineering says. The shortest recorded time for serious cracking to leak is 3 years, representing less than 20,000 cycles, and occurred on a laundry boiler subjected to frequent and rapid firing.
One difference is the language used to size their output. Two primary boiler types, the firetube boiler and the watertube boiler, are essentially opposite in design. A high pressure watertube boiler also spelled watertube and water tube is a type of boiler in which water circulates in tubes heated externally by the fire. A vertical fire tube boiler or vertical multitubular boiler is a vertical boiler where the heating surface is composed of multiple small fire tubes, arranged vertically.
This is the list of the main components in the fire tube boiler. Difference between fire tube boiler and water tube boiler with pdf. Fire tube boiler parts explained learn about the working of. What is difference between water tube boiler and fire tube boiler.
As the name, the firetube boiler flows the hot gas to the watercoated tubes. Cracking in fire tube boilers at welded joints is a frequent, costly and potentially dangerous occurrence. Apr 17, 2015 the difference between water tube boiler and fire tube boiler is from the boiler structure, water tube boiler is which the have lots of tubes in boilers, the water go through from tubes. The radiation zone of the furnace is covered on three sides by water tubes forming the first pass and the conventional smoke tube shell has tubes lined up forming the second and third pass of flue gases. Compared with shellandpan boilers, watertube boilers have no large diameter shell in structure. Fire tube and a vertical water tube boiler, at the washington navy yard, to ascertain their relative economic vaporizations with different kinds of coal. Aug 06, 2014 normal efficiency of the fire tube boiler is about 80 to 85 % but this can be increase or decrease by using different a accessories. Fire tube boiler operation and types of fire tube boiler. From table 1 it can be seen to be the second most common cause of failure in the sample of fire tube boilers.
Difference between fire tube boiler and water tube boiler 20170628 17. Fire tube as its name implies, the fire gas go through inside of pipes. A significant advantage of the watertube boiler is that there is less chance of a catastrophic failure. Comparison between fire tube and water tube boiler can be done in 14 aspects. Fire tube boilers, typically have a lower initial cost, are more fuel efficient.
Sep 27, 2017 in this video i saw whats the difference between water tube boiler and fire tube boiler on the basis of construction, equipment, uses. In the water tube boiler, the water and steam flow inside the tubes and the hot gases flow over the outside surfaces. Advantages and disadvantages of water tube boilers over. Steam locomotive, naval ships, and early models of cars, became the most sophisticated models of firetube boiler transportation in that period. The efficiency of the fire tube boiler is less as compared to. Locomotive boiler is a horizontal fire tube type mobile boiler. A water tube boiler is such kind of boiler where the water is heated inside tubes and the hot gasses surround them. One is known as fire tube boiler and the other one is known as water tube boiler.
Mar 04, 2020 a water tube boiler is such kind of boiler where the water is heated inside tubes and the hot gasses surround them. The main feature of the boiler is that the furnace of the boiler is surrounded by water and therefore there is no requirement of refractory material. Advantages and disadvantages of water tube boilers 20151104 08. Operation and types of water tube boiler electrical4u. In fire tube boiler, the fuel is burnt inside a furnace. Advantages following are the major advantages offered by fire tube boiler plants.
The furnaceflame volume can either be inside or external to the shell that contains the water. Water tube boiler and fire tube boilerdifference youtube. In order to examine the causes of failure, various techniques including visual inspection, chemical analysis, optical microscopy, scanning electron microscopy and energy dispersive spectroscopy were carried out. Fabrication of pilot multitube firetube boiler designed for. They are widely used in small installations to heat buildings and to provide power for factory processes. Operating pressure upto 100 bar efficiency upto 90% ste. Difference between fire tube boiler and water tube boiler. Actually this boiler is just opposite of fire tube boiler where hot gasses are passed through tubes which are surrounded by water advantages of water tube boiler. Firetube boiler 1800 the fire tube boiler, the oldest design, is made so the products of combustion pass through tubes surrounded by water in a shell. An account of the experiments made by chief engineers loring and baker, 1l s.
Inside water wall n totally new design industrial grade construction, 2 pass fire tube design with enhanced heat transfer features. In a watertube boiler, the heating element acts directly on tubes filled with water, which run through the furnace casing, to produce the needed steam or superhot water. What is difference between water tube boiler and fire tube. Fire tube boiler with a refractorylined rear door that directs gases to the tubes wet back fire tube boiler with three tube sheets and a turnaround chamber, with a water leg formed between the rear tube sheet an chamber. In this work, the modeling of the heat transfer between flue gas and water in a fire tube boiler is considered. Bent tube boilers watertube boilers of the bent tube design are capable of greater steam capacities, higher pressures, and greater versatility in arrangements such as floor space, head room, and more efficient use of the furnace. The water tube boilers furnace area can be easily altered to meet the fuel requirements. Between fire tube and water tube boilers, which has more. Advantages and disadvantages of water tube boilers over fire. Efficiency of the water tube boiler is more than that of fire tube and lies within the range of 85 to 90 %.
The furnace may be lined with watertubes called a watercooled furnace to absorb more radiant heat from the fire. The entire plant may be purchased as a complete package, only needing securing to basic foundations, and connecting to water, electricity, fuel and steam systems before commissioning. Water tube boilers boiler water passes through the tubes while the exhaust gases remain in the shell side, passing over the tube surfaces. Boilers are used to generate heat in thermal power plants so that it helps in generation of steam for the steam turbine. Fuel is burned inside the furnace, creating hot gas which heats water in the steamgenerating tubes. Operation of fire tube boiler is as simple as its construction. Apr 20, 2012 advantages following are the major advantages offered by fire tube boiler plants. It is 100% waterbacked and built for years of reliable service. Therefore, this boiler requires a large amount of heating surface and large grate area to burn coal at a rapid rate. We briefly discuss about water tube boiler parts and functions.
The combination fire tube and water tube boiler of claim 1, further characterized by a second fire tube boiler between the steam and mud drums and also connected therewith to provide for natural circulation of the recipient fluid medium to and from the steam drum in indirect heat transfer relation with hot gaseous high. Manufacturers of other boiler types, such as vertical, water tube and cast iron sectional boilers, have used the bhp output rating as a means of comparison with fire tube boilers. Actually this boiler is just opposite of fire tube boiler where hot gasses are passed through tubes which are surrounded by water. Failure analysis of the boiler waterwall tube sciencedirect. A combination fire tube and water tube boiler comprising. The fire tube boiler is manufactured in massachusetts with the highest quality materials. Dec 07, 2016 unlike fire tube boiler, where the hot gas is circulated through tubes to heat water in a tank, water tube boilers involve running water through tubes surrounded by a heated tank. A firetube boiler is a type of boiler in which hot gases pass from a fire through one or many more tubes running through a sealed container of water. Jun 05, 2018 comparison between fire tube and water tube boiler can be done in 14 aspects.
Firetube boilers have the advantage of being easy to install and operate. Difference between fire tube boiler and water tube boiler fire tube. Feb 22, 2018 the water tube boilers furnace area can be easily altered to meet the fuel requirements. In this video i saw whats the difference between water tube boiler and fire tube boiler on the basis of construction, equipment, uses. Fire tube boiler is one of the most basic types of boiler and the design is also very old. In water tube boilers, the ratio of water content to the steam capacity is comparatively less than the fire tube boiler. The main requirement of this boiler is that it should produce steam at a very high rate. There are a number of considerations to factor when determining the best boiler for your steam generation needs like operating pressure, steam poundshour output, demand fluctuation, general application requirments and total cost of ownership, etc. The combination fire tube and water tube boiler of claim 1, further characterized by a second fire tube boiler between the steam and mud drums and also connected therewith to provide for natural circulation of the recipient fluid medium to and from the steam drum in indirect heat transfer. Hence water tube boilers can quickly generate steam at the required pressure than the fire tube boiler.
A water tube boiler is a type of boiler in which water circulates in tubes heated externally by the fire. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam the firetube boiler developed as the third of the four major historical types of boilers. In this way, the installation cost of fire tube boiler systems gets reduced. Firetube and a vertical watertube boiler, at the washington navy yard, to ascertain their relative economic vaporizations with different kinds of coal. As the name, the fire tube boiler flows the hot gas to the water coated tubes. In a firetube boiler, the heating element produces hot water through a more indirect mechanism.
When hot combustion gases travel through boiler tubes which are surrounded by the boiler water, the boiler is called a fire tube boiler the use of bent tube boiler designs allows the furnace wall to be lined with tubes, thereby exposing more of the heating surface to. Unlike fire tube boiler, where the hot gas is circulated through tubes to heat water in a tank, water tube boilers involve running water through tubes surrounded by a heated tank. A water tube boiler runs off of water tubes that are heated externally by fire. Water tube boiler operation and types of water tube. The basic causes of reduction in boiler tube lifetime in waste combustors are well known in general terms. The goal in both cases is to maximize the heat transfer between the. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam. Difference between water tube boiler and fire tube boiler.
Difference between fire tube boiler and water tube. Different pipeline designs from the various firetube boilers, are to maximize the heat absorption of the combustion gases. Jul 05, 2016 on this channel you can get education and knowledge for general issues and topics. Water circulates in tubes and heated externally by hot gases. On this channel you can get education and knowledge for general issues and topics. The furnace may be lined with watertubes called a water cooled furnace to absorb more radiant heat from the fire. Merits and demerits of water tube boiler over fire tube.
1565 307 1154 138 1000 872 1039 758 395 1504 484 98 1155 379 464 851 73 691 249 1313 326 1283 1499 388 1566 1336 534 1219 125 740 872 557 1453 1259 585 1280 91 1191 112 572 581 677 466 1473 417 917 752 261