Description of reaction turbine It consists of a wheel or rotor, casing, fixed and moving blades. In this type, equal number of fixed and moving blades are attached alternately to the casing and the wheel respectively. The fixed blades is similar to a nozzle where velocity increases with decrease of pressure. Working Principle In reaction…
Locomotive boiler is a horizontal drum axis, multi-tubular, natural circulation, artificial draft, forced circulation, mobile, medium pressure, solid fuel fired fire tube boiler with an internally fired furnace. It is used in railway locomotive engines and in marine. It is a mobile boiler and has a high steam generation rate. Construction or Main Parts The…
Applications of diesel power plant 1. Diesel power plant’s is in the range of 2 to 50 MW capacity. They are used as central station for small or medium power supplies. 2. They can be used as stand-by plants to hydro-electric power plants and steam power plants for emergency services. 3. They can be used as peak load…
A boiler which generates steam at a pressure of 85 kgf/sq.cm or above is termed as a “high pressure boiler”. The present tendency is towards the use of high pressure boilers in power plants. The modern high pressure boilers used for power generation have capacities of 40 to 1600 tonnes/hr of superheated steam with a…
It is a stationary, fire tube, internally fired boiler. The size is approximately from 7-9 meters in length and 2-3 meters in diameter. Construction of Lancashire Boiler: It consists of 1. Cylindrical shell 2. Furnace tubes, bottom flue and side flues 3. Grate 4. Fire bridge 5. Dampers Cylindrical shell It is placed in horizontal position over a brick work….
The image shows the simplest form of an internally fired vertical fire-tube boiler. It does not require heavy foundation and requires very small floor area. Cylindrical shell: The shell is vertical and it attached to the bottom of the furnace. Greater portion of the shell is full of water which surrounds the furnace also. Remaining…
A forced circulation boiler was first introduced by La-Mont in the year 1925 which is used in Europe and America. This is a modern high pressure boiler (water tube type steam boilers) working on forced circulation system. Working principle of La Mont Boiler The image shows the flow circuit of La Mont Boiler. explained working of each and…
This is also a modern high pressure water tube boiler using the forced circulation principle and named after Prof.Loeffler. Salient features of Loeffler Boiler The novel feature of the Loeffler Boiler is to evaporate water solely by means of superheated steam. The furnace heat is supplied only to economiser and superheater. In other words, steam is used as a heat absorbing…
The presence of steam bubbles in contact with the surface of tubes seriously impairs heat transmission from the flue gases to water. By rising the boiler pressure to the critical pressure of steam (225 kgf/sq.cm.), this difficulty is overcome, as suggested by Mark Benson in 1922. At the critical pressure water and steam have the same…
It is a multi-tubular vertical fire tube boiler having a number of horizontal fire tubes. T is the modification of a simple vertical boiler where the heating surface has been increased by means of a number of fire tubes. It consists of 1. Shell 2. Crate 3. Fire box 4. Flue pipe 5. Fire tubes 6. Combustion chamber 7. Chimney 8. Man-hole Shell…