What are the precautions to be taken while steam pressure is reduced for a process?

Fully open bleed valves, using reduced system pressure, to remove any remaining condensate. Activate cold steam piping slowly at reduced pressure and with trap bleed valves continuously open. To prevent possible condensate accumulation, place blowdown valves before and after a vertical rise.

What are the common problems encountered in operating a steam generating unit?

Common Boiler Problems With Water Quality

• Scale Build Up.
• Water and Safety Probes Breaking From Scale Deposits.
• Water Leaks.
• Greater Than Normal Amounts of Sludge.
• Foaming in the Boiler Tank.
• Corrosion Within the Boiler System.
• Corrosion or Leaks in the Pipes.
• Scale or Sludge Buildup in the Boiler.

Why does my steam boiler keep turning off?

If the boiler keeps shutting off, it could be due to closed valves, air caught in the system or a broken pump. If there is enough air in the system to cause your boiler to switch itself off, it should be obvious when you start bleeding your radiators, as plenty of air will gush out of them.

What problems occur can arise in boilers if maintenance is not carried out properly?

The fuel system, particularly the burner, requires periodic cleaning and routine maintenance. Failure to maintain the equipment in good working order could result in higher fuel costs, the loss of heat transfer or even a furnace explosion.

What is steam pressure?

Steam pressure is a very important property of steam when learning about steam turbine generators and gas laws. The force of steam pressure is shot through a nozzle in a steam impulse turbine and is strong enough to turn the blades of the turbine at such a high pressure.

How does pressure affect steam?

With the increased pressure, you in turn get steam at higher temperatures. Higher temperature steam contains more energy per pound, which is known as Enthalpy. Typically if a boilers pressure is higher, more material is needed to help the boiler withstand the heat necessary to generate the steam.

What are the common problems in boiler tubes?

Stress Corrosion Cracking. Various corrosion mechanisms contribute to boiler tube failure.

Caustic Embrittlement.

Fatigue and Corrosion Fatigue.

Stress-Induced Corrosion.

Dissolved Oxygen.

Chelant Corrosion.

Caustic Attack.

Steam Blanketing.

What are the common mechanical problems that might happen to a boiler?

The following are seven common problems that occur with boilers.

• Circulation problems. To warm your home, hot water must circulate through the heating pipes to various parts of the structure.
• Water leaks.
• Expansion tank problems.
• Thermostat problems.
• Lime scale build-up.
• Sludge build-up.
• Pilot light problems.

Why is my boiler off?

There are a variety of reasons why your boiler may not be working; common examples include the boiler pressure being too low or too high, a power cut, gas supply issues, a faulty pilot light, a frozen condensate pipe, faulty internal components or a more complex issue.

Why does my boiler cycle on and off?

The pressuretrol (which controls when a boiler turns on and off based on steam pressure) will short cycle due to this increasing pressure. The boiler pressure is too high. When this happens, air that’s trapped and compressed by water and steam can cause the boiler to short cycle.

What are the main problems caused by boiler feed water?

When treating boiler feed water (the combination of boiler makeup and condensate return water), several issues can arise that cause boiler scaling, corrosion, fouling, and system failure.

What are the advantages and disadvantages of steam power plant?

The cost of the Steam power plant is lower than several power plants. Life and effectiveness of the steam power plant are more concise when compared to Hydel power plant. Transport of fuel is a major problem. Cost of power generation is higher than hydropower. Air pollution is a major difficulty.

What happens to steam after it leaves the turbine?

Steam exits the turbine and is condensed back to water. Typically the condenser is a heat exchanger that uses a natural water source as working fluid. Many power plants are located along rivers or on lakes in order to have a place to return and reuse water. Condensate is returned to the boiler.

Why don’t we use steam power stations anymore?

This is because steam power stations are heavy to start and cannot be used to cater for top loads that frequently occur for a short term. Steam-powered power stations keep on working very close to full efficiency for 24 hours a day. Power Plants have a standard life of 30 to 40 years.

What are the facilities required for a steam power plant?

The station must be well attached to important transport routes eg Rail or Road. A new steam power plant often needs the transportation of material and machinery. Therefore, sufficient transportation facilities must exist i.e. the plant should be well attached to other parts of the land by rail, road. etc.