Table of Contents
What is grate in 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. Heat is exchanged from flue gases to the water into the fire tubes. The steam produce collected into the upper side of the shell and taken out by when the required pressure generated.
What are the accessories of Cochran boiler?
Cochran Boiler Mountings and Accessories
- Water level indicator.
- Pressure gauge.
- Safety valve.
- Stop valve.
- Blow off valve.
- Feed check valve.
- Fusible Plug.
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 function of Cochran boiler?
The Cochran boiler was produced by Cochran & Co. of Annan, Scotland. It is widely used in marine practice, either fired directly by coal or oil fuels, or else used for heat recovery from the exhaust of large diesel engines. The boiler is a cylindrical vertical water drum with a hemispherical domed top.
What is Draught in boiler?
Boiler draught is defined as the difference between absolute gas pressure at any point in a flow passage and the ambient (same elevation) atmospheric pressure. Draught is achieved a small pressure difference which causes the flow of air or gas to take place. It is measured in millimetre (mm) or water.
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 Draught and types?
Draught is defined as the difference between absolute gas pressure at any point in a gas flow passage and the ambient (same elevation) atmospheric pressure.
Why boiler Draught is provided?
Purpose of Boiler Draught To provide an adequate supply of air for fuel combustion. For throw out the exhaust gases of combustion from the combustion chamber. To discharge these gases to the atmosphere through the chimney.
What is accessories of boiler?
Boiler accessories are devices and plants that are installed with boilers to improve the operating condition and overall efficiency of the boiler plant. Boiler accessories are devices that are installed along the boiler and the surrounding area to increase the efficiency of the boiler.
What is economiser in boiler?
Economizers are heat exchangers that transfer the heat in the flue gas to another medium‚ generally the boiler feed-water‚ although other streams are sometimes used such as make-up water. There are 2 types of economizers: non-condensing and condensing.
What is Draught in boilers?
What is Draught explain?
Draught is the British spelling of the word draft. A cold burst of wind, a swig or a serving of a drink, the act of pulling a heavy load, and the depth of a ship below the surface of the water: each of these can be called a draught.