BOILER
Boiler is a closed vessel in which water pressure and is
converted into steam by heating continuously. Boilers produce steam according
to requirement (Temperature, Pressure, Quality).
Heat transfer in the boiler:
- Radiation → Flow radiant heat from hot objects to cold objects.
- Heat Conduction → direct contact between two objects.
- Convection Flow → emission from a hot object to a cold object to the hot object movement
The working principle of boilers in general:
Classification According to Heat Source:
1. Based on the result of fuel combustion
2. Utilizing the exhaust gas (Flue Gas) → WHB
3. elektrical boiler
4. Nuclear boiler
Classification by type of tube:
1. Fire tube boiler
2. Water tube boiler
Classification based on pressure:
1. 8.3 kg / cm² - 16.5 kg / cm² → Low
2. 16.6 kg / cm² - 51.5 kg / cm² → Medium
3. 51.6 kg / cm² - 144.5 kg / cm² → High
4. 144.6 kg / cm² - 227.5 kg / cm² → Very High
Boiler safety:
1. Safety Valve (PSV).
2. Estimates of Glass (Glass Level)
3. Nanometer (Gauge pressure)
4. Steam Valve stem cover (NRV)
5. Valve Wasters (Valve for blowdown)
6. Whistle danger (alarm)
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