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.
Where is Cochran boiler used?
It is used in Refining units. It is used in Paper manufacturing plants. You can find Cochran boilers in Chemical processing divisions. And it is used in a variety of process applications in various industries.
What is PA fan in boiler?
Primary Air Fans: Primary air fans or PA fans are high-pressure fans, used in the boiler power plants to supply the air for transportation of coal directly from the pulverizer to the furnace. PA fans give positive pressure upstream of the coal pulverizer and handle relatively clean air.
What is ID and FD in boiler?
An ID fan removes flue gases from a boiler and forces exhaust gas up a stack. Nearly every ID furnace operates with a slightly negative pressure. Forced Draft. Forced draft (FD) is achieved by forcing air into a furnace with a special fan and ductwork.
What is SA fan in boiler?
Secondary fans play an important role in power plants. The fuel inside the furnace can be burned with the help of the secondary fan. When required, the SA fan is used to increase the air flow to improve efficiency and save fuel.
What is kW rating of boiler?
What Does kW Output Mean for a Boiler? A kilowatt (kW) is equal to 1,000 watts and in any situation, is a unit that helps us measure power generated per second. From 12 and 18kW, to 32 and 40kW, these figures show the maximum power the boiler is capable of producing each second.
What is Fd ID Pa fan?
Comments Off. The induced draft (ID), forced draft (FD), primary air (PA) and the secondary air (SA) fans are the most important types of industrial blowers.
What is ton of boiler?
The tonnage of a boiler has two meanings: one is to measure the rated output or work capacity of the boiler. The steam boiler has an hourly evaporation capacity t/h, and the hot water boiler has an hourly heating capacity, 0.7Mw=1t.
What is flue gas in boiler?
Flue gas (sometimes called exhaust gas or stack gas) is the gas that emanates from combustion plants and which contains the reaction products of fuel and combustion air and residual substances such as particulate matter (dust), sulfur oxides, nitrogen oxides, and carbon monoxide (Table 3.7).
What is reheater in boiler?
What is Reheater on Boiler? — Reheater is a part of the boiler which to reheat steam output from the first level of the steam turbine. Reheated steam will again absorb the heat energy from the boiler to be used in the next level steam turbine. Reheater is one way to improve the thermal efficiency of the Rankine Cycle.
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 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.
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?