In this blog post, we will discuss the Velox boiler.
A Velox heater is a high-pressure, forced circulation, water-tube boiler. It was created during the 1930s by Brown Boveri Company of Switzerland. The main public exhibit of Velox was at VDI Scientific Conference in Berlin on 15 October 1932.
Working Principle of Velox Boiler:
The Velox principle combines the utilization of burning under pressure, with high pipe gas speeds and with a gas turbine, whereby the pressure in the combustion chamber, the high gas speeds, and the pressure drop of the gases for production of work are created by means of a compressor driven by the gas turbine, the last being incited by the results of combustion.
The huge significance of the Velox idea lies in the fact that by means of the increase in pressure and velocities the components are greatly decreased in size, and the processes are accelerated without impairing the efficiency.
Velox boiler is dependent on the principle that heat transfer rate increases when the velocity of flue gas is more than the speed of sound. This enhances the rate of steam generation.
Flue gases are utilized to turn a turbine which is connected to the compressor. It increases the flow of hot air to the speed of sound. This increases the rate of heat transfer to the water coming from the economizer into evaporating section causing it to produce more steam that goes in the superheater by a steam separator. Steam from the superheater is at high temperature and pressure. This is used to run the turbines.
Advantages:
- Velox boiler provides veryhigh heat transfer rate.
- It has very flexibility.
- Velox boiler is compact in design.
- It is easy to use.
- It is works on automation process.
- Thermal efficiency is very high.