Steam production and its utilization

1. Steam Production and Its
Utilization
By
Dr. T. Rajasekhar
Asst Professor
Department of Dairy Engineering
College of Dairy Technology, SVVU, Tirupati

2. What is Steam?
As the temperature increases and the water approaches its boiling
condition, some molecules attain enough kinetic energy to reach
velocities that allow them to momentarily escape from the liquid
into the space above the surface, before falling back into the
liquid.
When the number of molecules leaving the liquid surface is more
than those re-entering, the water freely evaporates.
Steam should be available at the point of use:
 In the correct quantity.
 At the correct temperature and pressure.
 Free from air and incondensable gases.
 Clean.
 Dry.

3. Steam Production
To produce steam Boiler is used. A number of different boiler
types have been developed to suit the various steam
applications.
The objectives of a boiler are:
• To release the energy in the fuel as efficiently as possible.
• To transfer the released energy to the water, and to generate
steam as efficiently as possible.
• To separate the steam from the water ready for export to the
plant, where the energy can be transferred to the process as
efficiently as possible.

4. Modern Packaged Boiler

5. Vertical Tube Packaged Boiler

6. Examples for Steam Heating
Possible layout of coils
in a rectangular tank
Side hung coils
A conventional jacketed vessel

7. Measurement of Steam Consumption

8. Arrangement of steam supply for consumers
of High Pressure and Low Pressure

9. Steam Distribution in a Dairy Plant