How does a water tube boiler work?

How A Water Tube Boiler Works. water tube boiler runs off of water tubes that are heated externally by fire. The tubes connect to a steam drum and a mud drum, and steam is produced in the upper drum. The water in the tubes creates steam directly, instead of tubes heating water as is the case in a fire tube boiler.

How are water tube boilers made?

It consists of a large steam drum vertically connected to a smaller water drum (a.k.a. “mud drum”) via multiple steam-generating tubes. These drums and tubes as well as the oil-fired burner are enclosed by water-walls – additional water-filled tubes spaced close together so as to prevent gas flow between them.

Which boiler is a water tube boiler?

Water tube boiler: The water circulates inside the tubes which are surrounded by the hot flue gases from the furnace. It generates steam at a higher pressure up to 165 bar. Examples: Babcock and Wilcox boiler, Stirling boiler, La – Mont boiler, Benson boiler, Loeffler boiler etc.

Why is it called water tube boiler?

A water tube boiler is such kind of boiler where the water is heated inside tubes and the hot gasses surround them. This is the basic definition of water tube boiler. Actually this boiler is just opposite of fire tube boiler where hot gasses are passed through tubes which are surrounded by water.

How long do water tube boilers last?

With proper maintenance, they are expected to last at least 15 years or longer.

What is the difference between fire tube boiler and water 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 parts of water tube boiler?

A water tube boiler is typically formed of four parts, a lower feed water drum – sometimes known as a mud drum – an upper steam drum with water surface from which the steam is evolved, water tubes connecting the two drums together and a super heater / economiser section (depending on the quality of steam required).

How many pressure does a water tube boiler can produce?

Advantages of water-tube boilers: The small diameter tubes and steam drum mean that much higher steam pressures can be tolerated, and up to 160 bar may be used in power stations.

Should I replace my 30 year old boiler?

The industry standard advice is to replace your boiler every 10 years, however some people still have boilers working that are over 30 years old. The very old boilers that keep going almost indefinitely do so because there is very little to go wrong in them. This might sound ideal, but they are terrible on gas bills.

Can a boiler last 40 years?

Age: Condensing boilers haven’t been on the market for a long time and therefore it is hard to predict their longevity. Some of these boilers can last even up to 50 years or longer, but even with decent annual maintenance, their efficiencies are much lower than today’s cast iron boilers.

Which is better fire tube or water tube?

Between the two types of boiler designs, water tube boilers are remarkably more efficient than their fire tube counterparts. This stems from a number of factors: Water turns to steam more quickly. When the water flows through the tube, it is surrounded by the heat source, rather than the other way around.

Where are water tube boilers used?

Water tube boilers can generate saturated or superheated steam, which is useful for applications such as steam turbine power generation. In addition, these boilers are commonly used in process industries, including chemicals , refining, and pulp and paper manufacturing.

Which kind of water tubes are used for boilers?

The main types are: Screen tubes: Placed before the super-heater, these tubes are adjacent to the furnace and absorb the flame as well as the generated hot gas heat. Superheater tubes: They are placed behind the screen tubes to carry the superheated steam from the boiler Generating tubes: These tubes connect the water drum and the steam drum.

Water Tube Boiler. In this system, a narrow tube filled with water passes through the furnace where the liquid is heated directly. A water tube system produces a lower volume of hot liquid due to its design, but generates a higher level of heat. The liquid heats the house the same way as with the fire tube system.

How does water tube type boilers work?

Water-tube Boilers. Water-tube boilers differ from shell type boilers in that the water is circulated inside the tubes,with the heat source surrounding them.

Convection section​. This part is designed to absorb the heat from the hot gases by conduction and convection.

Cross drum boiler.

What is the life span of a hot water boiler?

Some old boilers were designed as steam systems, and have been converted to hot water. typically lasted 20 to 35 years, although most of those are near the end of their life now. have life expectancies of 15 to 25 years. Some fail as early as 10 years into their life, and there are always those that do better.