Question

Which of the following statements regarding steam boilers are correct?

1. The boiler must be capable of quick starting and loading.

2. The boiler should have no joints exposed to flames.

3. The boiler must be capable of burning low ash content coal efficiently.
1. 1 and 2 only 
2. 1 and 3 only
3. 2 and 3 only
4. 1, 2 and 3

Answer 1

Correct Answer - Option 4 : 1, 2 and 3

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.

The steam boilers must have the following features for quality operation.

• The boiler must be capable of quick starting and loading.
• The boiler should have no joints exposed to flames.
• The boiler must be capable of burning low ash content coal efficiently.