The La Mont boiler is a high-pressure, water type boiler. It was first introduced in 1925 by La Mont. La Mont boiler works on the principle of forced circulation. The water circulation in La Mont boiler is maintained by centrifugal pump.
The arrangement of water circulation and different components of La Mount Boiler are shown in the below figure.
The feed water from hot well is circulated through the water walls and drums continuously and prevents tubes from being overheated.
The feed water first passes through economizer. Most of the sensible heat is supplied to the feed water passing through the economizer. This water enters the boiler drum. A water circulation pump draws water from the drum and delivers to the tubes of the evaporating section, where water is heated in large number of small-diameter tubes and a mixture is stored in the drum. the convective super heater water draws wet steam from the drum and heats the steam for its super heating. The superheated steam is supplied to prime mover.
La Mont boiler generates approximately 45 to 50 tonnes of steam per hour at a pressure of 13 bar and a temperature of 500°C.
Advantages of a La Mont Boiler:
- Small diameter tubes are used, so that high heat transfer rate is maintained.
- The multiple tubes circuit gives flexibility for suitable location of heat transfer equipments.
- A high evaporation rate is achieved in this boiler due to forced circulation of water.