which of the following is water tube boiler

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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Water Wall Panels - Vallourec

Boiler water walls are membrane walls that are made of tubes welded together with or without a strip of metal in between. These walls form the enclosure of the coal combustion chamber. Water wall tubes are also referred to as the evaporator section; they contain water mostly in liquid form which gradually evaporates as it rises in the boiler.

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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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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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Boiler Operation & Boiler Maintenance | HSB Locomotive

Boiler logs are the best method to assure a boiler is receiving the required attention and provide a continuous record of the boiler's operation, maintenance and testing. Because a boiler's operating conditions change slowly over time, a log is the best way to

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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-tube boiler - Wikipedia

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. Fuel is burned inside the furnace, creating hot gas which heats water in the steam-generating tubes.

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Boilers Flashcards | Quizlet

in what type of boiler do the gases of combustion flow through the tubes and thereby heat water that surrounds the tubes? water-tube which of the following components, receives feedwater and serves as a place for the accumulation of saturated steam which is generated in the tubes?

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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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Solved: 1. (a) Explain The Differences Between Fire-tube B

1. (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.

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Boiler Mountings and Accessories | CrazyEngineers

Sep 20, 2015· Boiler Mountings and Accessories. It protects fire tubes from burning when the level of the water in the water shell falls abnormally low and the fire tube or crown plate which is normally submerged in the water, gets exposed to steam space which may not be able to keep it cool. It is installed below boiler's water level.

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High Pressure Boilers Test 1 - ProProfs Quiz

Mar 28, 2019· The water in boilers is used to produce steam which generates energy for other processes. High-pressure boilers require specialized care to operate. High-pressure boilers require specialized care to operate.

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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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4th class power engineering chapter 52 Flashcards - Cram.com

Which of the following is not true about steel plate heating boilers? A) The combustor is located in the lower part . B) The upper section of the boiler is filled with water . C) They use a circulating pump to force water from radiators into the boiler. D) They use normal tubes to allow the combustion gases to flow through the 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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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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Commercial Boilers Final Exam Flashcards | Quizlet

Baffles are placed between the tubes of boiler for the purpose of directing the travel of flue gases a boiler has a steaming capacity of 35,500b of steam per hour.

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Firetube Boilers - The National Board of Boiler and

The furnace can be enclosed on its sides with a water cooled jacket or it may be made up of masonry. The top tube sheet in a steam boiler can be above or below the water line. When it is above, it is called a dry-top and when it is below, it is called a wet-top.

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