which of the following is water tube boiler

Boiler Operation and Maintenance - Energy Depot

When the boiler is shut down, inspect for scale deposits, accumulation of sediment or boiler compounds on the water-side surfaces. Stack flue gas temperatures should be no more than 150° greater than the steam or water temperature. Clean and scrape fire-side tubes to remove soot and scale if the desired temperature split is exceeded.

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Fire-tube boiler - Wikipedia

Water tubes. Fire-tube boilers sometimes have water-tubes as well, to increase the heating surface. A Cornish boiler may have several water-tubes across the diameter of the flue (this is common in steam launches ). A locomotive boiler with a wide firebox may have arch tubes or thermic syphons.

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water tube boiler tube leak that cannot be found - Boiler

Aug 01, 2007· Our Nebraska D type package water tube boiler has developed a leak that we cannot locate. This boiler was put into service in 1990. Its MAWP is 200 psi and its max rating is 55,000 #/hr.. We operate it at 90 psi and average 30,000 #/hr. during the winter months.

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Chemical Cleaning Of Boilers - To Clean or Not To Clean

Boiler start-ups and shutdowns can add a tremendous amount of deposit to the boiler tube wall. The number of start-ups is a better predictor of tube deposit density than operating hours. Time-based cleanings do not consider water chemistry (good or bad) or

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Fire-tube boiler - Wikipedia

Water tubes. Fire-tube boilers sometimes have water-tubes as well, to increase the heating surface. A Cornish boiler may have several water-tubes across the diameter of the flue (this is common in steam launches ). A locomotive boiler with a wide firebox may have arch tubes or thermic syphons.

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What are the types heat transfer taken in boiler? | Yahoo

Apr 05, 2012· Answers. The tubes heat up, and then transfer the heat into the boiler feed water. Radiation of heat absorbed into the boiler refractory, then absorbed by the boiler feed water inside the boiler tubes. This occurs mostly in the cases where fuel is combusted rather than superheated process fluids coming from a separate process.

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What is difference between subcritical supercritical boiler?

In a water tube boiler, the water circulates through the tubes, and the burner is usually under them. Most of the time, the "shell" of this style of boiler would not be watertight.

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Mechanical Engineering - Steam Boilers and Engines

In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be. Answer: Option B.

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types of water tube boiler -

2019-3-10 · 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..

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Characteristics of boiler feedwater - Lenntech

Characteristics of boiler feed water. A low-pressure fire-tube boiler can usually tolerate high feed-water hardness with proper treatment while virtually all impurities must be removed from water used in some modern, high-pressure boilers. Only relatively wide ranges can be given as to maximum levels of alkalis, salt, silica, phosphates etc,

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Which of the following is a water tube boiler - examveda.com

Which of the following statement is correct? A. Lancashire boiler is a fire tube boiler. B. Fire tube boilers are internally fired. C. Babcock and Wilcox boiler is a water tube boiler. D. All of the above

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New Steam Plants I Questions from 25 Sept 2012

A water-tube type boiler is more efficient than a fire-tube type boiler as . a water-tube boiler requires less maintenance: the water-tube boiler produces more pounds of steam per pound of boiler: Both "A" and "B" Neither "A" or "B" 101: A water-tube type boiler when compared to a fire-tube type boiler

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200 TOP Steam Boilers, Engines, Nozzles and Turbines

73. Which of the following is a fire tube boiler (a) locomotive boiler (b) Babcock and Wilcox boiler (c) Stirling boiler. (d) all of the above (e) none of the above. Ans: a. 74. Which of the following is a water tube boiler (a) locomotive boiler (b) Cochran boiler (c) Cornish boiler (d) Babcock and Wilcox boiler (e) Lancashire boiler. Ans: d. 75.

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Working and Function of mounting & accessories in boilers

Mar 21, 2013· To study the working and function of mounting & accessories in boiler. AIM: The mounting from an integral part of the boiler and are mounted on the body of the boiler itself. The following mountings are usually installed on the boiler. 1. Two safety valve Water tube boilers are externally fired or internally fired or both?? I mean which

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Multiple Choice Questions on Steam Boilers and Engines

The Following Section consists of Steam Boilers and Engines Questions on Physics. Take the Quiz and improve your overall Physics.

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Boiler Types and Classifications - Wiki - odesie by Tech

In a water-tube boiler ('''Figure 3'''), the water is inside the tubes and combustion gases pass around the outside of the tubes. The advantages of a water-tube boiler are a lower unit weight-per-pound of steam generated, less time required to raise steam pressure, a greater flexibility for responding to load changes, and a greater ability to operate at high rates of steam generation.

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Boiler Test Flashcards - Flashcard Machine - Create, Study

Oct 13, 2016· 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:

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The National Board of Boiler and Pressure Vessel Inspectors

Boilers rely on the water to protect the steel boiler tubes from the temperatures in the furnace which greatly exceed the melting point of the tube material. A buildup of deposits inside the tubes will produce an insulating layer which inhibits the ability of the water to remove the heat from the tube.

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Multiple Choice Questions on Steam Boilers and Engines

The Following Section consists of Steam Boilers and Engines Questions on Physics. Take the Quiz and improve your overall Physics.

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Water and Steam Boilers from Bryan Steam

Bryan Steam also offers boilers accessories, controls and indirect water and pool heaters. Bryan continues to combine the advantages of past experience with advanced technology, moving into the future as the leader in the design, manufacture and application of the flexible steel water tube boiler.

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