What are stay tubes in boiler?

Stay tubes are the ones in a boiler which give support to the end plates. The wall thickness of stay tubes higher than the normal tubes.

Thereof, how are boiler tubes supported?

The stay tubes with an increased diameter act as support for the boiler. Both types are welded onto the lower and upper tube plates. The steam space is formed by the shell plate and internal cone. In the exhaust gas boiler tubes, heat from the main engine exhaust gas is transferred to the water side by convection.

Beside above, what material are boiler tubes made of? steel

Then, what do you mean by fire tube boiler?

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.

Which is more efficient fire tube or water tube boiler?

Between the two types of boiler designs, water tube boilers are remarkably more efficient than their fire tube counterparts. Additionally, since the tube holds less water than the water tank of a fire tube design, it takes less time to turn that water to steam — and by extension, less fuel.

34 Related Question Answers Found

What is D type boiler?

The 'D-type' is the most common type of small- to medium-sized boilers, similar to the one shown in the schematic diagram. It is used in both stationary and marine applications. It consists of a large steam drum vertically connected to a smaller water drum (a.k.a. "mud drum") via multiple steam-generating tubes.

What is ogee ring in boiler?

Ogee ring: ''Ogee'' ring is a thicker plate which isolates the shell from the furnace. Tell tale hole: Orifice plate: A thin circular plate with an axial hole. It is fitted into a pipe line in order to enable a differential pressure measurement across it.

What is the most common type of high pressure boiler?

The most common type of high pressure boiler is the D type water tube boiler.

What is boiler mounting and accessories?

9 BOILER MOUNTINGS AND ACCESSORIES:BOILER MOUNTING: BOILER MOUNTINGS are the components generally mounted on the surface ofthe boiler to have safety during operation. Safety valve: it is a mechanical device used to safeguard the boiler, in case the pressure inside the boiler rises above its normal working atmosphere.

What is boiler header?

Boiler headers, or boiler manifolds are designed to simplify piping near the boiler, reduce installation time, labor costs and parts used. Available in various branch options with threaded inlet and outlet connections.

What are the two parts of a boiler?

A boiler is a self-contained combustion system that heats water. The hot water or steam produced by a boiler is then used in heating systems. Although designs vary, a boiler has four main parts: the burner, the combustion chamber, the heat exchanger and the pluming apparatus.

What is boiler banking?

Boiler Bank Tubes are Bent to Shape Tubes or Steam Generating Tubes where Water is converted to Steam. Boiler Bank Tubes carry a mixture of water and steam. These Shaped Tubes are generally fabricated from Seamless/ ERW Tubes.

What is boiler Draught?

Boiler draught is the pressure difference between the atmosphere and the pressure inside the boiler. Generally a modern coal fired boiler has balanced draught. Balanced draught — It has both ID as well as FD fan and the draught or pressure difference produced is balanced or almost equal to atmospheric pressure.

Where are fire tube boilers used?

Fire-tube boilers have the advantage of being easy to install and operate. They are widely used in small installations to heat buildings and to provide power for factory processes. Fire-tube boilers are also used in steam locomotives.

What is the difference between water and fire tube boiler?

The main difference between fire-tube boiler and water-tube boiler is that fire-tube boiler develops heating surface inside the drum while water-tube boiler develops heating surface outside the drum. That is, fire (flue gas) is in the tube of fire tube boiler and water is in the tube of water tube boiler.

Which boiler is high pressure boiler?

The high-pressure boilers are widely used for power generation in thermal power plants. Example: Lamont boiler, Benson boiler, loeffler boiler, Babcock and Wilcox boiler In high-pressure boiler if the feed-water pressure increases, the saturation temperature of water rises and the latent heat of vaporization decreases.

What is boiler and its types?

There are two general types of boilers: ''fire-tube'' and ''water-tube''. Boilers are classified as "high-pressure" or "low-pressure" and "steam boiler" or "hot water boiler." Boilers that operate higher than 15 psig are called "high-pressure" boilers. A hot water boiler, strictly speaking, is not a boiler.

How does a boiler work?

A boiler is water containing vessel which transfers heat from a fuel source (oil, gas, coal) into steam which is piped to a point where it can be used to run production equipment, to sterilize, provide heat, to steam-clean, etc. The energy given up by the steam is sufficient to convert it back into the form of water.

How do you fire a boiler?

Close the bottom blowdown valves, then open the upper drum vent valves. Start filling with soft water. Manually inject boiler water treatment chemicals including oxygen scavenger chemicals, so that the chemicals are added with the fill water. Once full to the operating level, open the fuel system and fire the boiler.

What is package type boiler?

A package boiler is a factory-made boiler. Package boilers are used for heating and act as a steam generator for small power purposes such as self-powered industrial plants. They cannot be used for large-scale power plants such as co-generation plants due to their size and lack of efficiency.

Why are large boilers water tubes?

Advantages of Water Tube Boiler

Larger heating surface can be achieved by using more numbers of water tubes. Due to convectional flow, movement of water is much faster than that of fire tube boiler, hence rate of heat transfer is high which results into higher efficiency.

At what temperature does water turn to steam?

212°F