BOILER MOUNTINGS PDF

With technical advancements and increasing emphasis on safety of ship and crew, various boiler mountings and boiler safety devices have been introduced. When a boiler installation is done on board a ship, it can only be considered as complete, when different types of boiler mountings, including boiler controls, are fitted to ensure safe and efficient operation of a gas boiler. It usually is non-return type of valve directly mounted on the steam space of the boiler shell. The body is made of cast iron, and the valve seat is of gunmetal. The valve is smaller in size and usually of a non-return type.

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The other means is to be either an additional glass gauge or an approved equivalent device. Both the systems are to be operate audible and visible alarm and automatic shut off. All such of equipment is to be capable of operating audible and visible alarms and also of automatic shutting off the fuel supply to the burners when the water level falls to predetermined low level.

Level switch and Alarms Low water level cutout failure 16 A pressure gauge is fitted in front of boiler in such a position that the operator can conveniently read it. It reads the pressure of steam in the boiler and is connected to steam space by a siphon tube. The most commonly, the Bourdon pressure gauge is used. Safety Valve Safety valves are located on the top of the boiler.

They guard the boiler against the excessive high pressure of steam inside the drum. If the pressure of steam in the boiler drum exceeds the working pressure then the safety valve allows blow-off the excess quantity of steam to atmosphere.

Thus the pressure of steam in the drum falls. The escape of steam makes a audible noise to warn the boiler attendant. There are four types of safety valves: 1. Dead weight safety valve. Spring loaded safety valve 3. Lever loaded safety valve 4. High steam and low water safety valve According to design feature safety valve can be classified as Ordinary lift, High lift, Improved high lift and full bore.

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Boiler Mountings And Their Function – Complete List

Boiler mountings are components used for ensuring the safety of boiler operation. These are generally mounted on the surface of the boiler. Control fluid parameters at the inside of the boiler shell. The mountings are the essential part of a boiler, without which boiler operation is impossible. Boiler Accessories Accessories are the auxiliary items required for proper operation of boiler and improve the efficiency of it. These are integral parts of the boiler, but not mounted on it. Control fluid parameters at outside of the boiler.

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Boiler-Mountings.pdf

Boiler Construction A typical steam boiler consist of a burner used to provide heat source to the water. Why most boiler drums are cylindrical in shape? Heat is lost along the surface; so for a alloy steel body which stores hot water and steam the minimum surface area possible will be a sphere. A sphere is the best design possible as it not only reduce heat loss but also withstand extreme pressure.

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Boiler Mountings and Accessories: Types, and Their Working.

The other means is to be either an additional glass gauge or an approved equivalent device. Both the systems are to be operate audible and visible alarm and automatic shut off. All such of equipment is to be capable of operating audible and visible alarms and also of automatic shutting off the fuel supply to the burners when the water level falls to predetermined low level. Level switch and Alarms Low water level cutout failure 16 A pressure gauge is fitted in front of boiler in such a position that the operator can conveniently read it. It reads the pressure of steam in the boiler and is connected to steam space by a siphon tube.

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Difference Between Boiler Mountings And Boiler Accessories

The long life of the boiler. Economizer diagram Superheater: It is a heat exchanger in which products of the heat of combustion is utilized to dry the wet steam and to make superheated by increasing its temperature. During superheating of the steam, pressure remains constant and its volume and temperature increase. A superheater consists of a set of small diameter U tube in which steam flows and takes up the heat from hot flue gases. Advantages: There is a saving in fuel consumption.

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