Question

Within the boiler, the temperature of steam is highest in
1. Water drum
2. Water tubes
3. Water walls
4. Super heater

Answer 1

Correct Answer - Option 4 : Super heater

Explanation:

Steam boiler:

• The heat of combustion of coal in the boiler is utilized to convert water into steam at high temperature and pressure.
• The flue gases from the boiler make their journey through super-heater, economiser, air pre-heater and are finally exhausted to atmosphere through the chimney.
• The boiler system comprises of feed water system, steam system and fuel system.
• The feed water system provides water to the boiler and regulates it automatically to meet the steam demand. Various valves provide access for maintenance and repair.
• The steam system collects and controls the steam produced in the boiler. Steam is directed through a piping system to the point of use. Throughout the system, steam pressure is regulated using valves and checked with steam pressure gauges.
• The fuel system includes all equipment used to provide fuel to generate the necessary heat.

Super heater:

• A super-heater is a device used to convert saturated steam or wet steam into superheated steam or dry steam at constant pressure.
• In a super heater the temperature of steam reaches to its highest value within the boiler.