A vertical boiler is a type of steam boiler that is designed with a vertical cylinder shape. Vertical boilers are often used in small- to medium-sized facilities, such as schools, hospitals, and small industrial plants, where space is at a premium.
This is the simplest type of a fire tube boiler. A simple vertical boiler produces low Pressure and a small quantity of steam. It occupies very less space so it is used where limited space is available. We discuss about simple vertical boiler working design and its Parts. A simple vertical boiler diagram is shown.
It consists of a cylindrical shell surrounded by a vertical cylindrical box named called a firebox. This is slightly tapered towards the top of the shell to allow the ready passage of the steam to the surface. At the bottom of the firebox, is a grate. The firebox is fitted with two or more inclined cross tubes. These tubes are used to increase the heating surface of a simple vertical boiler and also increase water circulation. At the top of the firebox, there is a stack (Produce Natural Draught). Hand holes are provided at the end of cross tubes to clean them. A manhole is also available at the top of the shell for a man to enter in the boiler for cleaning or maintenance. A mud hole is provided at the bottom of the shell to remove the mud that settles down. The space between the boiler shell and the firebox is filled with water to be heated. A tubular gauge glass is also provided to see the water level inside the boiler. A pressure gauge, safety valve, air vent valve, and steam supply valves are also installed there at the top of the crown plate.
Simple vertical boiler working
The fuel is fed into the grate through the fire hole. when fuel is burnt, the ashpit is used to collect the ash from the burning fuel which is located at the bottom of the grate. The boiler dia is normally 3 feet and 9 inches to 5 feet and its height is 9 feet .each cross tube has a dia of 9 inches. The boiler heating surface is 80 feet square and its grate area 8.4 feet square. The boiler pressure is 100 PSI. The combustion gas flows from the furnace and passes around the tubes. These gasses escape to the atmosphere through the chimney. Due to natural circulation hot water moves from the lower end to the higher end. The supply of steam is then regulated through a stop valve.
There are several types of simple vertical boilers that are commonly used in small- to medium-sized facilities, including the following:
- Fire-tube vertical boilers: These boilers are designed with a series of tubes through which hot gases from a furnace pass and heat the water surrounding the tubes. The hot gases rise through the tubes, transferring heat to the water, and the resulting steam is used to heat a space or power an industrial process.
- Electric vertical boilers: These boilers use electricity to heat water or generate steam and do not require a fuel source such as coal, oil, or gas. They are an alternative to gas- or oil-fired boilers and are often used in facilities where access to a fuel source is limited or where there are concerns about emissions.
- Wood-fired vertical boilers: These boilers use wood as a fuel source and are often used in rural or remote areas where access to other fuel sources is limited. Wood-fired boilers are relatively simple in design and operation and are often used in small-scale heating and power generation applications.
- Waste heat recovery vertical boilers: These boilers are designed to recover and utilize the waste heat from industrial processes or power generation. They are often used in conjunction with other types of boilers or energy-producing equipment,
Also, Read the Package type Boiler