What is the working principle of Cochran boiler?
What is the working principle of Cochran boiler?
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 type of boiler is Cochran?
multi-tubular vertical fire tube boilers
A Cochran Boiler is one of the multi-tubular vertical fire tube boilers that has several horizontal fire tubes. Cochrans are the modification of a simple vertical boiler where the heating surface has been increased employing some fire tubes.
What is the function of smoke box in Cochran boiler?
It is at the bottom of the combustion chamber for firing fuel inside the furnace. The chimney is provided at the top of the boiler and it is connected to the smokebox. These exhaust gases are coming out from fire tubes and pass through smokebox and exhaust through a chimney.
What are the 3 types of boiler?
There are three main types of boilers you can install into your home: combi boilers, heat only (regular boilers) and system boilers.
Is Cochran boiler high pressure?
Applications of Cochran Boiler Besides, they are frequently employed in power generation plants where large quantities of steam (ranging up to 500 kg/s) having high pressures i.e. approximately 16 mega-pascals (160 bar) and high temperatures reaching up to 550 °C are generally required.
What is the maximum working pressure of Cochran boiler?
15 bar
What is the maximum working pressure of Cochran boiler? Explanation: The maximum working pressure of Cochran boiler is 15 bar. It has a maximum steam capacity of 4000 kg/hr. It is usually operated around 6.5 bar.
Is Cochran boiler low pressure boiler?
The Cochran boiler is a solid fuel-fired, multi-tubular, low pressure, natural draft, natural circulation, vertical drum shaft, fire tube boiler. It has an internally fired furnace. This type of boiler is an improved version of the simple vertical boiler. It has fire tubes in the horizontal direction.
What is boiler firing rate?
The total fuel flow to a heater is usually measured with a flowmeter. Because all the burners in a heater are typically designed to fire at the same rate, the firing rate of an individual burner can be calculated by dividing the total firing rate of the heater by the number of burners.
What are the 2 types of boiler?
When we think about boilers, there are a two types that typically come to mind; firetube, or scotch marine, and watertube boilers. These types of boilers can be classified as hot water, steam, high pressure, and low pressure.
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 the range of efficiency of Cochran boiler?
Cochran boiler and economiser systems will operate up to 96% efficiency, based upon an NCV of 34828 kJ/m3 for Natural Gas and an NCV of 35863 kJ/l for Distillate Fuel Oil.
What is the height of a Cochran boiler *?
5.79 m
Explanation: Cochran boiler is a multi-tube boiler. It is vertical and has a number of fire tubes arranged horizontally. The height of the boiler is 5.79 m and working pressure is around 6.5 bar usually.
Working Principle of Cochran Boiler: 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.
What is the shape of a Cochran boiler?
Cochran boiler consists of a cylindrical shell with its crown having a spherical shape. The furnace is also hemispherical in shape. The grate is also placed at the bottom of the furnace and the ash-pit is located below the grate.
How does the fuel enter and exit a Cochran boiler?
The air then enters the combustion chamber through the atmosphere and the fuel exits the fire hole. Heat is exchanged from the flue gases in the fire tubes to the water. What are the applications of Cochran boilers?
What is a Cochrane boiler and where is it used?
Cochrane boilers are employed in power generation plants where there is a large volume of steam with a pressure higher than about 500 kg/s. 160 bar and higher temperatures reach 550o C. Most of the time, they are employed in refining units.