Table of Contents
- 1 What would cause considerable corrosion of the boiler and feed systems?
- 2 What are the four 4 main types of corrosion with respect to boiler water that can damage the boiler?
- 3 What would be the problem may cause if there are hydroxide in a boiler feed water?
- 4 What are the disadvantages of boiler corrosion?
- 5 What are the two major types of corrosion?
- 6 How do I stop my boiler from priming?
- 7 What causes high TDS in boilers?
- 8 What is effect of corrosion?
- 9 Why does my boiler keep leaking hot water?
- 10 Why is the pressure valve on my boiler not closing?
What would cause considerable corrosion of the boiler and feed systems?
The steam, which escapes from the boiler, frequently contains liquid droplets and gases. This leads to poor heat transfer and reduces the efficiency of the boiler. Dissolved gasses such as oxygen and carbon dioxide will react with the metals in the boiler system and lead to boiler corrosion.
What are the four 4 main types of corrosion with respect to boiler water that can damage the boiler?
Corrosion is a relevant problem caused by water in boilers….For further information about the different types of corrosion check the following web pages:
- Galvanic corrosion.
- Caustic corrosion.
- Acidic corrosion.
- Hydrogen embrittlement.
- Oxygen attack.
- Carbon dioxide attack.
What would be the problem may cause if there are hydroxide in a boiler feed water?
Corrosive attack on the boiler metal by high caustic concentrations or dissolved oxygen may be the cause of this problem. Some of the most serious boiler operation problems, such as tube warpage, rupture, localized overheat, foaming, priming, and scale formation, can be traced to oil contamination of boiler feedwater.
What does sulfite do in a boiler?
Sulfites. Sodium sulfite is generally used for the chemical removal of dissolved oxygen within the boiler water. To assure the rapid and complete removal of the oxygen entering the boiler feedwater system the concentration of sulfite in the boiler must be maintained at a minimum of 20 PPM (parts per million).
How will you protect boiler from corrosion?
PREVENTIVE MEASURES:
- Eliminating corrosive gases.
- Removal of dissolved oxygen.
- High PH value of boiler water.
- Mechanical deaeration of boiler water.
- Higher feed water temperature i.e. reduces its oxygen content.
- Chemical de-oxygenation by use of oxygen scavengers i.e. sodium sulphite.
What are the disadvantages of boiler corrosion?
The loss of boiler efficiency from boiler corrosion can cause a huge increase in operating costs. It is believed that the costs can be anywhere from $50,000 to $1m. Once corrosion gets to this point it also becomes very difficult to maintain.
What are the two major types of corrosion?
CORROSION TYPES And Prevention
- Uniform Corrosion. Uniform corrosion is considered an even attack across the surface of a material and is the most common type of corrosion.
- Pitting Corrosion.
- Crevice Corrosion.
- Intergranular Corrosion.
- Stress Corrosion Cracking (SCC)
- Galvanic Corrosion.
- Conclusion.
How do I stop my boiler from priming?
The most common measure to prevent foaming and priming is to maintain the concentration of solids in the boiler water at reasonably low levels. Avoiding high water levels, excessive boiler loads, and sudden load changes also helps.
How do I control the pH in my boiler water?
pH is controlled by either removing water impurities or adding other chemicals to neutralize the condition. For example, Caustic Soda, an alkaline, is added to neutralize CO3, carbonic acid.
How do I lower the alkalinity in my boiler water?
The alkalinity can be removed and/or decreased in several ways:
- Acid feed (if the company is prepared to handle acid);
- Degasifier;
- Lime-soda softening;
- Hydrogen cycle ion exchange/soft water split-stream makeup; and.
- Dealkalization with strong base anion ion exchange resin.
What causes high TDS in boilers?
As water is boiled within the boiler and steam is produced, then the solids remain in the water and concentrate. Thus, over time the level of total dissolved solids (TDS) increases. Further evaporation causes these dissolved solids to come out of solution, and to produce suspended solids (sludge).
What is effect of corrosion?
Some of the effects of corrosion include a significant deterioration of natural and historic monuments. Air pollution causes corrosion, and it’s becoming worse worldwide. Corrosion also degrades important infrastructure such as steel-reinforced- highways, electrical towers, parking structures and bridges.
Why does my boiler keep leaking hot water?
The valves on boilers are designed to release pressure to avoid causing an explosion by purposefully leaking water. Faulty pressure is generally caused by the accumulation of sediment, which prevents the pressure valve from closing and increases pressure on the boiler.
Can a leak in an indirect cause a boiler to pop?
Yes, if your indirect has a leak in the coil it will cause the symptoms you are describing. Try valving off the indirect, lowering boiler pressure to system requiriments, run boiler up to temp and watch pressure. If it stays within parameters you have your answer.
What is the purpose of balance leak-off line in a boiler feed pump?
And there is a ARC valve ( automatic recirculation ) in delievery line of feed pump whose outlet is in de-aerator of boiler. then what is the purpose of balance leak off line?
Why is the pressure valve on my boiler not closing?
The valves on boilers are designed to release pressure to avoid causing an explosion by purposefully leaking water. Faulty pressure is generally caused by the accumulation of sediment, which prevents the pressure valve from closing and increases pressure on the boiler. You can test to see if there is sediment build-up by following certain steps.