(a) Explain the differences between fire-tube boilers and water-tube boilers with respct to the following: • construction • operation • main mechanisms of heat transfer • properties and uses of steam produced. (b) Discuss the major factors which affect the choice of boiler type for particular applications.
Watertube boilers, on the other hand, only require roughly 10% of the water in firetube boilers. This helps to limit the risk of too much water turning into steam instantly and blowing the doors off the boiler, which is possible with conventional boilers. More importantly, all of the water is confined inside the tubes. If one of those tubes
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. This is the key difference between these boilers.
Less water in a water tube boiler No. Most, like Stirling, B&W and Heine boilers are suspended from steel work with cleats or U-bolts, however some designs are not suspended.
Water tube boilers are those in which - examveda.com. Water tube boilers are those in which. A. Flue gases pass through tubes and water around it B. Water passes through the tubes and flue gases around it C. Work is done during adiabatic expansion D. Change in enthalpy Answer: Option C
(a) Explain The Differences Between Fire-tube Boilers And Water-tube Boilers With Respct To The Following: • Construction • Operation • Main Mechanisms Of Heat Transfer • Properties And Uses Of Steam Produced. (b) Discuss The Major Factors Which Affect The Choice Of Boiler Type For Particular Applications.
Water-tube boilers differ from shell type boilers in that the water is circulated inside the tubes, with the heat source surrounding them. Referring back to the equation for hoop stress (Equation 3.2.1), it is easy to see that because the tube diameter is significantly smaller, much higher pressures can be tolerated for the same stress.
Industrial Boiler & Mechanical is proud to offer packaged "O" and "D" Type watertube boilers. With pressure capacity up to 1500 psig and the ability to generate saturated or superheated steam, water tube boilers are commonly used throughout the power generation industry to drive turbines.
Tube removal clearance is to the side and requires less space than a fire tube boiler design potentially reducing the boiler room foot print. UNILUX – Engineered for performance and durability. Unilux Flexible steel water tube boilers are the preferred boiler design for hot water heating applications due to their resistance to thermal shock.
Fire Tube Boilers. Also referred to as smoke tube boilers, shell boilers, package boilers Multiple gas paths - 2, 3 and 4 pass Internal furnace or fire box as the 1st pass Dry back or wet back design Single fuel or dual fuel design Little or no steam separation equipment.
Fire tube boilers are a lower cost alternative to water tube boilers and are often used for smaller industrial facilities with lower operating pressures. The main advantages of a fire tube boiler are its simple construction, compact size and the ability to easily meet rapid fluctuations in steam demand.
Term The steam and water drum of water tube boilers is dished (concave) to eliminate the need for: stays Exam 1 Steam Boilers. The steam and water drum of water tube boilers is dished (concave) to eliminate the need for:
1 points In water tube boilers water passes through the tubes which are surrounded by flames and hot gases the flames and hot gases pass through the tubes which are surrounded by water
67. Water tube boilers are those in which (a) flue gases pass through tubes and water around it (b) water passes through the tubes and flue gases around it (c) work is done during adiabatic expansion (d) change in enthalpy (e) none of the above. Ans: c. 68. Locomotive type’ boiler is (a) horizontal multitubular water tube boiler
For more information on our D-type water tube boiler and other watertube steam boilers call us at 847-541-8300. Capacity Range. The “D” style water tube steam generator is capable of producing up to 500,000 Ib steam/hr at design pressures up to 2,000 PSIG and superheated steam up to 1,050°F.
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. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam.
Water tube boilers are the most widely used boilers. These type has replaced many boilers, including the fire tube type, mainly because of the following reasons : The weight of the water tube boiler is much less than any type of boiler of equivalent size. Steam raising and steam generation process is much faster
D type watertube boiler design. D type watertube boilers are designed with a large steam drum at the top, vertically connected to a smaller water drum (or "mud drum") at the bottom, via multiple steam-generating tubes which carry feed water (providing the main heat transfer surfaces for the production of steam).
Sep 10, 2017 · In FTB ( fire tube boiler ) hot flue gases are travelling inside the tube and water are outside the tube but in WTB (water tube boiler ) water inside the tube and hot flue gases are outside the tube . fire tube boiler are low pressure boiler and water tube boiler are the high pressure boiler .
Modern boilers are made of alloy steel to withstand high pressures and extremely high temperatures. Most conventional steam boilers are classed as either fire-tube or watertube types. In the fire-tube type, the water surrounds the steel tubes through which hot gases from the furnace flow.
Answers.com is the place to go to get the answers you need and to ask the questions you want What are boiler water tubes made up the first basic patent for Corner Tube Boilers
Baffles in water tube boilers are generally spiral twisted pieces of metal (though other methods have been used) inserted into the flue tube to cause turbulence, in addition to back pressure for
Single Tube Boilers: The boilers which contain one fire tube or water tube are called as single tube boiler. The examples of single tube boilers are Cornish boiler and simple vertical boiler.
Mar 17, 2010 · The words are literal , a water tube boiler is water inside the tubes with hot gases surrounding them and a fire tube boiler are got gases within the tubes with water surrounding them.
The answer is in the name. Boilers are made with a "tube - in - shell" construction, and the name implies what is in the tube. In a water tube boiler, the water circulates through the tubes, and
D type water tube boiler. In the water tube boiler, the water and steam flow inside the tubes and the hot gases flow over the outside surfaces. Where as in fire tube boilers hot gases from combustion travels through the tubes. flue gases produced from furnace where fuel is burnt.
Answer-A 17. If the boiler tubes are scaled on the water side then A. Heat conduction through the tubes will be very high leading to rapid evaporation B. The boiler furnace can get damaged due to excessive temperatures C. The surface of the tube will be overheated as heat transfer is impaired D.
A water tube boiler is able to operate at higher pressures than other systems, which makes it an attractive option for some situations. The fire tube boiler design is much weaker, and this makes it unsuitable for high pressure boilers. Water tube boilers are more modern and a more sophisticated
Feb 27, 2018 · (also spelled water-tube and water tube) is a type of boiler in which water circulates in tubes heated externally by the fire. Fuel is burned inside the furnace, creating hot gas which heats water in the steam-generating tubes. In smaller boilers, additional generating tubes are separate in the furnace,
Apr 23, 2018 · Water Tube Damage: Boiler Tube can be damaged if there is any dust in the feed water. Because it blocks the water circulation. Because it blocks the water circulation. The deposition of salt and sediments in the inner surface of the Water Tube is a common problem for this type of boiler.
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Nov 24, 2016 · This leads to scale formation inside the boiler, resulting in localized overheating and ending finally in tube failure.It is therefore necessary to control the level of concentration of the solids and this is achieved by the process of ‘blowing down’, where a certain volume of water is blown off and is automatically replaced by feed water – thus maintaining the optimum level of total dissolved solids (TDS) in the water.
The total heating surface of a boiler includes all parts of the boiler which are exposed on one side of the gases of combustion and on the other side to the water and steam being heated The heating surface incudes: generating surface, generating tubes, screen tubes, waterwall tubes, support tubes, superheater surface, and economizer surface
Advantages and Disadvantages of Water Tube Boilers 2015-11-04 08:57:36. There are two main boiler types that people can choose from for their specific application: water tube boilers and fire tube boilers. Of the two, water tube boilers contain wider range than fire tube boilers and they are applied widely in industries.
Fire-tube boilers are those in which the products of combustion pass through the tubes and the water surrounds them. WATER-TUBE BOILERS. Water-tube boilers may be classified in a number of ways. For our purpose, they are classified as either straight tube or bent tube. These classes are discussed separately in succeeding sections. To avoid
Feb 18, 2009 · Answers. Fire Tube boilers have hot gases from combustion inside the tubes and the water surrounds the tubes. Fire tube boilers are classified by the number of passes the combustion gases make through the water to be heated into steam. So in a two pass fire tube boiler, half of the tubes have hot combustion gas passing from left to right.
WATER TUBE BOILER ⌈2⌋ Water flows through tubes that are surrounded by hot combustion gases in a shell. • Usually rated in tons of steam/hr • Used for H.P. steam • High capacity. In recent years, interest has been revived in high temperature hot water heating systems for institutional, industrial and commercial plants.
When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as (A) Internally fired boiler (B) Externally fired boiler
Boiler that has water in the tubes with heat and gases of comb a cylinder device that separates water droplets from steam thr has heat and gases of combustion passing through tubes that ar