Actually this boiler is just opposite of fire tube boiler where hot gasses are passed through tubes. Water tube and fire tube boilers are complete opposites in terms of the location of the water relative to the hot gases resulting in water tubes boilers. Feb 19, 2015 the firetube boiler passes combustion gas inside a series of tubes surrounded by water in a vessel to produce steam, while a watertube instead sends water through a series of tubes surrounded by combustion gas used to transfer heat energy and produce steam. The fuel burns on the grate of the firebox in the boiler and the resultant hotflue gases are permitted to flow in the region of cross tubes. The fire tube boiler transfers hot gas into a series of tubes that are surrounded by water in the vessel to produce steam. A high pressure watertube boiler also spelled water tube and water tube is a type of boiler in which water circulates in tubes heated externally by the fire. Fire tube gas boiler vs water tube gas boiler zhengzhou boiler may, 2016. If the boiler is a steam boiler, the natural pressure created by the steam forces the steam to flow through the piping. These types of boiler are generally considered safer than fire tube. However, with less water present in a water tube boiler, if anything goes wrong, the explosion wont be anywhere near as serious as it would be in a fire tube boiler. Simple vertical fire tube boiler produces steam with low pressure and in small quantities. 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. Mostly used boiler in small and medium industries with different fuels and steam pressure requirements. Fire tube boiler definition, construction, working.
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. According to the flow of water and hot gases, a boiler is classified in to fire tube boiler and water tube boiler. A water tube boiler is such kind of boiler where the water is heated inside tubes and the hot gasses surround them. This shell is the external cylindrical part of a pressure container. 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. Water tube boiler and fire tube boilerdifference youtube. Usually two types of boiler is most commonly used in many industries and power generation. Advantages and disadvantages of water tube boilers over fire tube boilers. 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. Fire tube gas boiler vs water tube gas boiler zhengzhou boiler.
The firetube boiler passes combustion gas inside a series of tubes surrounded by water in a vessel to produce steam, while a watertube instead sends water through a series of tubes. What you need to know when choosing between a fire tube. Apr 23, 2016 the difference between fire tube boiler and water tube boiler can be done on various points. The unit is also compatible with glycol based systems. Aug 26, 2014 the difference between the two is that the water tube boilers are safer and last much longer than the fire 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. Water tube boiler operation and types of water tube boiler. We need to replace the tube bundles of both the above boilers. In smaller boilers, additional generating tubes are separate in the furnace, while larger utility boilers rely on the water filled tubes. Water circulates in tubes and heated externally by hot gases. Industrial boilers mainly can be classified as a fire tube and water tube boilers. Types of boilers in thermal power plant water tube vs. Westinghouse fire tube boiler westinghouse water heating.
While this type of commercial boiler would be ideal for both low and highpressure steam, or for hot water. It is less suitable for impure and sedimentary water, as a small deposit of scale may cause the overheating and bursting of the tube. When fire tube boilers run low on water, the metal in the boilers shrinks. Steam produced by these boilers is about 25 bar pressurised and therefore belongs to the lowpressure boiler category. Boilers come in all different types, sizes, and shapes and are classified by configuration of the furnace, or firesides, and the watertubes, or water. Fire tube boiler vs water tube boiler explained in hindi. Cost of water tube and fire tube boilers posted in industrial professionals. A comparison between water tube and fire tube boilers. Jan 23, 2020 differences between fire tube boiler vs water boiler fire tube boiler. Efficiency of the water tube boiler is more than that of fire tube and lies within the range of 85 to 90 %. Difference between fire tube boiler and water tube boiler 20170628 17. Thermal energy released by combustion of fuel is used to make steam at the desired. Basics of industrial steam boiler system miura america.
These tubes run through the water vessel and heat the water via convection. A fire tube boiler creates heat in pipes to heat the water surrounding the tubes, and the boiler vessel itself contains the water being heated. A boiler in thermal power plant utilizes the heat for converting water into steam. In water tube boilers the water flows through tubes and hot combustion gases flow over these tubes. Water tube boiler operation and types of water tube. Fire tube boiler is the most predominant boiler used for heating, commercial and industrial applications. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam.
Fire tube boilers are a lower cost alternative to water tube boilers and are often used for smaller industrial facilities with lower operating pressures. From a cold start, the firetube boiler, due to its larger water volume, takes longer to bring up to operating temperature or pressure vs. In a watertube boiler, it contains a minimal amount of water at any given time. The difference between fire tube boiler and water tube boiler. Sep 03, 2019 fire tube boiler vs water tube boiler. Demerits of water tube boiler over fire tube boiler.
The difference between the two is that the water tube boilers are safer and last much longer than the fire tube boiler. Give domestic hot water priority by controlling your water heating through the boiler system controls. The distinction between fire tube boiler and water tube boiler should be possible on different focuses. Jul 12, 2016 a fire tube boiler setup directs heated gases into a number of tubes that run through a conversely, in a water tube boiler the water is inside the tubes and the heat source is on the outside. Most conventional boilers use a fire tube design, in which hot flue gas runs through a tube that is surrounded by the water in the tank. Jun, 20 from a cold start, the firetube boiler, due to its larger water volume, takes longer to bring up to operating temperature or pressure vs. Which is better fire tube boiler or water tube boiler answers. Fire tube boiler vs water tube boiler 202044 fire tube boiler vs water tube boiler. The water tube boiler is those boiler in which the water is present inside the tubes and fire or hot gases surround these fire tubes. Fire tube boiler it is a boiler in which the hot flue gases is present inside the tubes and the water surrounds these tubes.
Aug 30, 2019 the water tube boiler generates more steam of high pressure whereas a fire tube boiler generates steam of low pressure. The firetube boiler passes combustion gas inside a series of tubes surrounded by water in a vessel to produce steam, while a watertube instead sends water through a series of tubes surrounded by combustion gas used to transfer heat energy and produce steam. A boiler in which flames and hot gases produced during combustion pass through the tubes and water flowing outside the tube called fire tube boilers. Comparison between fire tube and water tube boiler can be done in 14 aspects.
The simple vertical boiler is a fire tube boiler and easy to understand the working principle of fire tube boilers. The difference between fire tube boiler and water tube boiler depends on many factors. With less water volume, a watertube boiler can follow load swings more precisely and generally has better turndown. The differences between water tube boilers and fire tube. Mar 19, 2016 the main difference between fire tube and water tube is that in fire tube boiler the flue gases flow in the tubes and water flows from the shell and in water tube boiler, water flows from the tubes and the flue gases from the shell or passes over the tubes. It is the small space between two plates having water and at the other side of the plate hot gases are available to transfer heat to the boiler water. Although firetube boilers are smaller in design, they have a larger water volume than similar size watertube boilers, causing them to take longer to bring up to operating temperature from a cold start. These points includes types of fluid flows within the tubes, steam generation rate, floor area required for the steam generation, transportation, efficiency, fluctuating loads, operating cost etc. 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. As stated earlier, all firetube boilers should be factory packages to include burner installation, fuel train piping, controls, boiler trim, and a full factory fire test to capacity on the fuels that will be used in the field. Steam produced by these boilers is about 25 bar pressurised and therefore belongs to the lowpressure boiler. Firetube boilers have easy access to the boilers firesides and tubes can easily be replaced without additional repair of the boiler. 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.
A boiler is the most important component in a thermal power plant. Watertube or firetube condensing boiler, which is the. Difference between fire tube boiler and water tube boiler. In water tube boilers, the ratio of water content to the steam capacity is comparatively less than the fire tube boiler. In the true, engineering sense there is no pro or con or competition between the water tube boiler design and the fire tube boiler design. Watertube boilers contain the water and steam inside a network of mud and steam drums plus the interconnecting bent water tubes. The tubes connect to a steam drum and a mud drum, and steam is produced in the upper drum. This boiler delivers to site as a whole package factory assembled. Todays lessons will be discussed about difference between fire tube boiler and water tube boiler that means fire tube boiler vs water tube boiler. Merits and demerits of water tube boiler over fire tube. The hot combustion gases used to heat the water circulate outside these tubes. It may be just onetenth the volume of a fire tube boiler, which requires a larger volume of water to act as a heat shield so that metal in the boiler doesnt melt and create problems. Mar 17, 2010 it is the small space between two plates having water and at the other side of the plate hot gases are available to transfer heat to the boiler water. Firetube boilers have easy access to the boiler s firesides and tubes can easily be replaced without additional repair of the boiler.
Fuel is burned inside the furnace, creating hot gas which heats water in the steamgenerating tubes. Actually this boiler is just opposite of fire tube boiler where hot gasses are passed through tubes which are. These tubes run through the water vessel and heat the water. Top 50 steam boilers mechanical interview questions and answers for fresher experienced. Fire tube steam boiler nationwide boiler nationwide. We have 2 boilers of 100 tph capacity with 41 bar pressure rating.
These types of boiler are generally considered safer than fire tube designs and typically require less frequent maintenance. Boilers typically come in either a fire tube or water tube heating design, and they are designed either to run on natural gas or a dualfuel option. The water in the tubes creates steam directly, instead of tubes heating water as is the case in a fire tube boiler. We will discuss the fire tube boiler, different types of firetube boilers, defects, and uses. In watertube boilers water passes through tubes and hot flue gasses surround them. The main differences between the fire tube and the water tube boiler are the hot gases flow inside the tube and water surround them in the fire tube boiler whereas, in the water tube, water flows inside the tube and hot gases surround them. The package boiler only requires electricity, water. The dry back boiler design uses a common rear tube sheet and features convenient fire side and water side access. Jun 05, 2018 comparison between fire tube and water tube boiler can be done in 14 aspects. Difference between fire tube and water tube boiler. Jan 05, 2018 difference between fire tube and water tube boiler. As fire is present insides the tubes, hence it is called as fire tube boiler. Their size is also larger and have a faster recovery time. Thermal energy released by combustion of fuel is used to make steam at the desired temperature and pressure.
Although firetube boilers are smaller in design, they have a larger water volume than similar size watertube boilers. The watertube boiler may just result in a tube leak, which can be easily contained. Cost of water tube and fire tube boilers industrial. Each fits an application or niche that the engineer specifies or identifies. Those aspects are operating pressure, passage of material type in tubes, rate of steam generation, handling. A water tube boiler is a type of boiler in which water circulates in tubes heated externally by the fire. In a firetube boiler, the heating element produces hot water through a more indirect mechanism. The main difference between fire tube and water tube is that in fire tube boiler the flue gases flow in the tubes and water flows from the shell and in water tube boiler, water flows from the tubes and the flue gases from the shell or passes over the tubes. The water tube boiler can be built with boiler shell, burner, mud drum or mud ring, furnace, safety valve, strainer, sight glass, feed check valve, steam stop valve, etc. Advantages and disadvantages of water tube boilers over. Integrate this boiler with a westinghouse high efficiency indirect water heater for even more energy savings.
A water tube boiler runs off of water tubes that are heated externally by fire. In firetube boilers hot flue gases pass through tubes and water surrounds them. 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 examples of the fire tube boiler are the simple vertical, cochran, lancashire, cornish, locomotive, scotch marine, and velcon boiler water tube boiler. Water tube boiler definition, components, working principle. What is difference between water tube boiler and fire tube. Fire tube boiler vs water tube boilercomparison of boiler. Boilers are used to generate heat in thermal power plants so that it helps in generation of steam for the steam turbine. Which is better fire tube boiler or water tube boiler. The water tube boiler may just result in a tube leak, which can be easily contained. It uses for low power generation or for limited space.
The universal type of steam boilers is the smoke tube or fire tube boiler where the heat and gases of combustion from furnace pass through tubes that are enclosed by water. The difference between fire tube boiler and water tube boiler can be done on various points. These focuses incorporates sorts of liquid streams inside the cylinders, steam age rate, floor zone. In the general scheme of things you would never apply a fire tube. Differences between fire tube boiler vs water boiler fire tube boiler. While in water tube boilers, water passes through tubes. Feb 22, 2018 the water tube boilers furnace area can be easily altered to meet the fuel requirements. While this type of commercial boiler would be ideal for both low and highpressure steam, or for hot water applications, it is limited in the amount of pressure available. The dryback boiler reversal chamber has a rear wall that is lined, or jacketed with refractory, which passes combustion gasses from the furnace to multiple tube sheets and reflects burner heat, resulting in exterior radiation losses. Hence water tube boilers can quickly generate steam at the required pressure than the fire tube boiler. Instead of having vertical metal tubes filled with water, a firetube boiler has horizontal tubes filled with heat from the burner flames. The fire tube boiler is available in natural gas and liquid propane. Packaged boiler is the most common and efficient type of fire tube boiler used in industry to produce steam and hot water.
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