What mean by Cochran boiler?
What mean by Cochran boiler?
Cochran Boiler is a multi-tubular vertical fire tube boiler having a number of horizontal fire tubes. It is the modification of a simple vertical boiler where the heating surface has been increased by means of a number of fire tubes.
What is working pressure of Cochran boiler?
The boiler operates under a working pressure of 7 bar and has a maximum capacity of up to 15 bar. The height and shell diameter of the Cochran Boiler approximately are 5.75m and 2.75m respectively.
What are the basic specification of Cochran boiler?
Specification of the Cochran boiler
| Height | 5.75 m |
|---|---|
| Shell diameter | 2.75 m |
| Steam capacity | 3500 kg/hr (max. 4000 kg/hr) |
| Working pressure | 6.5 bar( max. 15 bar) |
| Heating surface area | 120 m |
What is the work of boiler?
Your boiler is the heart of your central heating system. It sends hot water through to your radiators and taps to provide you with heating and hot water. This heat is then used to heat water that returns from your central heating system. These systems thus help to reduce energy wastage as less heat energy is required.
How do Cochran Boilers work?
The Cochran boiler works as same as other fire tube boiler. First, The coal is placed at the grate through the fire hole. Then the air is entering into the combustion chamber through the atmosphere and fuel is sparked through fire hole. Heat is exchanged from flue gases to the water into the fire tubes.
What is range of efficiency of a Cochran boiler?
10. What is range of efficiency of a Cochran boiler? Explanation: The efficiency of a Cochran boiler varies in the range of 70 to 75%, it depends on the fuel used. The steam capacity of a Cochran boiler is 3500 kg/hr and working pressure around 6.5 bar.
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 the process of boiler?
A boiler incorporates a firebox or furnace in order to burn the fuel and generate heat. The generated heat is transferred to water to make steam, the process of boiling. This produces saturated steam at a rate which can vary according to the pressure above the boiling water.
What is the purpose of super heater in a boiler?
Explanation: function of the superheater is to increase the temperature of steam above its saturation temperature. as heat contained in unit mass of superheated steam is more than dry saturated or wet steam, it is extensively used in steam power plants.
What is the height of Cochran boiler?
For maintenance access to the tubes, a manhole is provided in the hemispherical dome. A typical Cochran boiler, as illustrated, might be 15 feet (4.57 m) high and 7 feet (2.13 m) in diameter, giving a heating surface of 500 square feet (46.45 m2), and a grate area of 24 square feet (2.23 m2).
Is Cochran a water tube boiler?
Cochran boiler is a multi-tubular vertical fire tube boiler having numbers of horizontal fire tubes. It is the modification of a simple vertical boiler where the heating surface has been increased by means of numbers of fire tubes.
What is a Cochran boiler?
At the end of every article, you can download PDF. Cochran boiler is a fire tube boiler (Fire inside the boiler and water surrounding to them) in which coal or gases as a working fluid is used, for generating the steam and that steam further used for several purposes. The grate is basically known as the door for placing the fuel.
What is the difference between simple vertical boiler and Cochran boiler?
Cochran boiler is efficient than the simple vertical boiler and it was founded by Cochran & Co. of Annan. In this boiler, the fire tubes are placed horizontally and the hot gases are surrounded around them for the generation of steam.
What is the use of fire brick in a Cochran boiler?
It is a special type of brick ling use in Cochran Boiler to reduce the convection of heat from the outer surface of the boiler. Fire Brick is generally made of fire clay. It is used to control the flow of water inside the boiler, it also helps to restrict the backflow of water.
What does the water level indicator do in a Cochran boiler?
It blows off the extra steam when the steam pressure inside the boiler reaches above safety level. The position of the water level in the Cochran boiler is indicated by the water level indicator. It glass tube fitted out side of the boiler to check the water level inside the boiler.
