Following are the different types of Boilers:
Simple Vertical boiler :
Parts of simple vertical boiler:
1. Fire hole
2. Fire box
3. Cross box
4. Hand hole
5. Fire box
6. Fusible plug
7. Water gauge
8. Cylindrical shell
9. Steam space
10. Manhole
11. Pressure gauge
12. Steam stop valve
13. Safety valve
14. Uptake
15. Chimney
16. Ash pit
17. Grate
18. Feed check valve
Cochran Boiler or Vertical Multitubular Boiler :
Parts of Cochran Boiler:
2. Crate
3. Fire box
4. Flue pipe
5. Fire tubes
6. Combustion chamber
7. Chimney
8. Man-hole
Scotch Marine Boiler :
The marine steam boilers of the scotch or tank type are used for marine work, particularly, due to their compactness, efficiency in operation and their ability to use any type of water. It does not require brick work setting and external flues. It has a drum of diameter from 2.5 to 3.5 meter place horizontally. These steam boilers may be single ended or double ended. The length of a single ends steam boiler may be upon 3.5 meter while for double ended upon 6.5 meters. A single ended boiler has one to four furnaces which enter from front end of boiler. A double ended boiler has furnaces on both ends, and may have furnaces from two to four in each end.
It is of two types:
1. Single Ended
2. Double Ended
Single Ended Scotch Marine Boiler:
The length of the single ended steam boiler may be upto 3.5 mThe single ended steam boiler contains one to four furnaces and these furnaces enter from the front end of the boiler.
Double Ended Scotch Marine Boiler:
The length of double ended steam boiler is upto 6.5 m.In double ended scotch marine boiler, the furnaces are present on both of its ends. And the number of furnaces varies from 2 to 4 in each end.
Parts of Scotch Marine Boiler:
2. Combustion chamber
3. Smoke box
4. Chimney
5. Boiler shell
Lancashire Boiler :
It is a stationary fire tube type, internally fired, horizontal and natural circulation boiler. It is used where working pressure and power required are moderate. These boilers have a cylindrical shell of 1.75m to 2.75m diameter. Its length varies from 7.25m to 9m. It has two internal flue tubes having diameter about 0.4 times that of shell. This type of boiler is set in brick work forming external flue so that part of the heating surface is on the external shell.
Parts of Lancashire Boiler:
1. Cylindrical shell
2. Furnace tubes, bottom flue and side flues
3. Grate
4. Fire bridge
5.Dampers
Cornish Boiler :
Parts of Cornish boiler:
2. Shell
3. Side flue
4. Bottom flue
5. Grate
6. Stop valve
7. Chimney
8. Ash pit
9. Blow of cock
10. Stop valve
11. Safety valve
Locomotive Boiler :
It is multi-tubular horizontal, internally fired mobile boiler. Locomotives boiler are divided into three main parts :
1.smoke box,
2.shell box and
3.fire box.
The principle feature of this boiler is to produce steam at a very high rate. It consists of a shell or barrel having 1.5 meter diameter and 4 meters in length. The coal is fed into the fires box through the fire door and burns on grate. The flue gases from the grate are deflected by brick arch, and thus whole of the fire box is properly heated. There are about 157 thin tubes or fire tubes(47.5 mm diameter) and 24 thick or super heated tubes(130 mm diameter). The flue gases after passing through these tubes enter a smoke box. The gases are then lead to atmosphere through a chimney. The barrel contains water around the tubes, which is heated up by the flue gases and gets converted into steam.
Parts of Locomotive Boiler:
2. Damper
3. Ash pit
4. Fire box
5. Fire hole
6. Fire brick arch
7. Fusible plug
8. Operating rod
9. Steam whistle
10. Safety valve
11. Regulator
12.Barrel
13.Super heating tube
14. Steam pipe
15. Steam header
16. Smoke box
17. Blast pipe
18. Super heated steam out let
19. Chimney
20. Door
Babcock and Wilcox Boiler :
Parts of Babcock and Wilcox Boiler:
2. Water tubes
3. Uptake-header and down corner
4. Grate
5. Furnace
6. Baffles
7. Super heater
8. Mud box
9. Inspection door
10.Damper
La-Mont Boiler :
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.This is a modern high pressure water tube type steam boiler working on a forced circulation. The circulation is maintained by a centrifugal pump, driven by a steam turbine, using steam from the boiler. The forced circulation causes the feed water to circulate through the water walls and drums equal to ten times the mass of steam evaporated. This prevents the tube from being overheated.
Parts Of La-Mont Boiler:
1. Steam separator drum
2. Circulating pump
3. Distributing header
4. Evaporator
5. Convection superheater
6. Steam outlet
7. Economizer
8. Air preheater
9. Capacity
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