In a water tube boiler, water is contained in tubes that are surrounded by hot gas. In a shell boiler, hot gas flows through tubes that are surrounded by water. In both cases, the hot gas is able to heat the water. It’s as if the gas is passing backwards and forwards through the boiler, heating the water as it moves.
What is the working principle of water tube boiler?
The working principle of water tube boiler is thermal siphoning (circulation of natural water). Basically, this type of boiler includes two drums namely steam, lower or mud drum. The water tube boiler diagram is shown below, and these two drums are associated via two tubes such as downcomer and riser.
What is a shell and tube boiler?
Shell and tube boilers are also referred to as fire tube or smoke tube boilers. Fire tube boilers; contain long steel tubes through which the hot gasses from a furnace pass and around which the water to be converted to steam circulates.
What is shell type boiler?
Shell boilers may be defined as those boilers in which the heat transfer surfaces are all contained within a steel shell. 1b shows a more efficient method of reversing the hot gases through a wet back boiler configuration. The reversal chamber is contained entirely within the boiler.
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 is exchanger and types?
There are three main types of flows in a spiral heat exchanger: Counter-current Flow: Fluids flow in opposite directions. Spiral Flow/Cross Flow: One fluid is in spiral flow and the other in a cross flow. Spiral flow passages are welded at each side for this type of spiral heat exchanger.
What is water tube type boiler?
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 boils water in the steam-generating tubes. Here, saturated steam is drawn off the top of the drum.
What are the different types of shell and tube heat exchanger?
The three flow types of shell and tube heat exchangers are parallel, counter, and cross. The design, operation, and applications necessitate the three flow types be used in combinations. Parallel flow is when the shell and tube sides enter the heat exchanger at the same end and flow directly to the opposite end.
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.
What are the components of a water tube boiler?
Components of Water Tube Boiler The water tube boiler can be built with boiler shell, burner, mud drum or mud ring, furnace, safety valve, strainer, sight glass, feed check valve, steam stop valve, etc. Boiler Shell: This shell is the external cylindrical part of a pressure container.
What is a shell boiler and how does it work?
Shell boilers may also be referred to as ‘fire tube’ or ‘smoke tube’ boilers because the products of combustion pass through the boiler tubes, which in turn transfer heat to the surrounding boiler water.
What is the working principle of bent tube or Stirling boiler?
Working Principle of Bent Tube or Stirling Boiler. The feed water first enters into right most upper drum. Due to more density this water comes down in the lower water drum. The water within that water drum and the connecting pipes to the other two upper drums, are heated up and consequently steam bubbles are produced.
What is a horizontal straight water tube boiler?
This is a horizontal straight water tube boiler; it has a steam drum which is made of steel. The two ends of the drum are associated with a series of two end headers with short riser pipes. These are disposed at 15o0 angle to the horizontal axis of the steam drum.
