What is brick bridge in fire tube boiler?

ADVERTISEMENTS: The fire brick bridge is so placed that it closes the through passage of air in the internal flue and so air has to pass through fire grate bars before it can enter the furnace and thereby complete combustion of fuel takes place.

What are the parts of fire tube boiler?

Different Components & Mountings Placed on the fire tube boiler

• Safety valve.
• Feed check valve (a kind of non-return valve)
• Water level indicator.
• Pressure gauge.
• Steam stop valve.

What are the parts of fire tube boiler and its functions?

A locomotive boiler has three main components: a double-walled firebox; a horizontal, cylindrical “boiler barrel” containing a large number of small flue-tubes; and a smokebox with chimney, for the exhaust gases. The boiler barrel contains larger flue-tubes to carry the superheater elements, where present.

Why end plates of boiler are curved?

The steam drum A and water drum B are connected of by means of a number of tubes. The ends of the tubes are bent so that they can be connected to the drums radially as shown in Fig. 11.11. The ends of the tubes in the drums are expanded in order to have gas tight joint.

What is mounting and accessories?

Mountings are water level indicator, safety valve, pressure gauge, etc. It may be noted that a boiler cannot function safely without the mountings. The boiler accessories are the devices, which form an integral part of a boiler but are not mounted on it. They include superheater, economiser, feed pump etc.

What is difference between water tube and fire tube 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 surrounded by combustion gas used to transfer heat energy and produce steam.

What are the difference between fire tube boiler and water tube boiler?

Which material is used for boiler tubes?

Boiler tubes are seamless tubes and are made of either carbon steel or alloy steel. They are widely used in steam boilers, for power generation, in fossil fuel plants, industrial processing plants, electric power plants, etc. Boiler tubes can either be medium-pressure boiler pipe or high-pressure boiler pipe.

What are the 2 parts of the boiler?

Key Components of Boilers are:-

• Burner – The burner is the component of boiler that provides the heat that heats the water of system.
• Heat exchanger – The heat exchanger of boiler allows the heat from the burner to heat the water in system.

What is mud drum in boiler?

The mud drum acts to concentrate solids such as salts formed from hardness and silica or corrosion products carried into the boiler. Colder, denser water flows to the mud drum through a small number of downcomer tubes, and rises to the steam drum through a much larger number of riser tubes.

What is feathering in boiler?

The valve disk starts to rise and relieve pressure from the boiler. The valve is now said to be “throttling” or “feathering”. When this happens there is 605 PSIG pressure operating on 1-1/4 square inches and the upward thrust is 756.25 pounds.

What is a brick bridge in a boiler?

Fuel used to burn inside the boiler furnace and heat is generated. Then heat transfer to the water inside the boiler and became steam. A brick bridge is used inside the combustion chamber. By using this brick bridge less fuel is needed and the efficiency of the boiler is increased. A corrugated shape will be found with the furnace plate.

What is a vertical fire tube boiler?

As a one-pass boiler design, vertical fire tube boiler has the furnace on the bottom. The tubes run between the upper and lower tube sheets. With this type of design, the furnace may be comprised of masonry or enclosed on its sides with a water-cooled jacket.

How does a firefire tube boiler work?

Fire tube boilers are designed to transfer hot gases from the heating source and cycle these gases through tubes that circulate through a drum filled with water. This process effectively transfers the heat from the gas into the water, which effectively generates steam.

What is a firebox boiler?

The firebox boiler design utilizes locomotive boilers and fire tube firebox boilers. As a one-pass boiler design, the combustion products pass through the locomotive boiler once. Depending on the arrangement of the tubes and baffles, some firebox boiler designs may be a three-pass or two-pass.