Why is my boiler foaming?
Boiler water carry-over is the contamination of the steam with boiler-water solids. Bubbles or froth actually build up on the surface of the boiler water and pass out with the steam. This is called foaming and it is caused by high concentration of any solids in the boiler water.
What is foaming in an auxiliary boiler and how do you prevent it?
What causes priming in a boiler?
What is the effect of foaming and priming?
Which oil is used in boiler to avoid foaming?
How do you treat a steam boiler with water?
- Remove Hard Water Elements. Water treatment typically begins with sediment filters to remove suspended solids and water softeners to remove calcium, magnesium and other metal cations. …
- Pre-Heat the Feedwater. …
- Treat Feedwater with Required Chemicals.
- Remove Hard Water Elements. Water treatment typically begins with sediment filters to remove suspended solids and water softeners to remove calcium, magnesium and other metal cations. …
- Pre-Heat the Feedwater. …
- Treat Feedwater with Required Chemicals.
What causes sludge in steam boiler?
Sludge build-up forms when suspended materials found in the water stick onto the inner surfaces of hot boiler tubes. It can result in a combination of various solid materials such as corrosion matter, minerals, and oils.
What causes carryover in a steam boiler?
Mechanical causes of carryover include boiler design, high water level, firing method, and load characteristics. Chemical causes of carryover include high solids concentration (dissolved or suspended), excessive alkalinity, grease, oil, or other contamination.
What is the difference between scale and sludge?
If the precipitation takes place in the form of loose and slimy precipitate, it is called sludge. On the other hand, if the precipitated matter forms a hard, adhering crust/coating on the inner walls of the boiler, it is called scale.
What causes carryover in a boiler?
Mechanical causes of carryover include boiler design, high water level, firing method, and load characteristics. Chemical causes of carryover include high solids concentration (dissolved or suspended), excessive alkalinity, grease, oil, or other contamination.
How do you stop a steam boiler from surging?
If the boiler is just surging, it’s probably because the water is dirty. Clean the system according to the boiler manufacturer’s recommendations. There’s oil in the boiler. It’s very hard to see oil if you’re looking in the gauge glass, but it will create a film that causes priming and, in some cases, foaming.
What is priming in a steam boiler?
Priming is the carryover of varying amounts of droplets of water in the steam (foam and mist), which lowers the energy efficiency of the steam and leads to the deposit of salt crystals on the super heaters and in the turbines.
How do you treat the salt in the feed water of a boiler?
Boiler feed water treatment
1. By keeping the hardness salts in a suspension in the solution to prevent scale formation. 2. By stopping any suspended salts and impurities from sticking to the heat transfer surfaces.
What is amine used for in boiler?
Neutralizing amines are volatile compounds that control corrosion by neutralizing the corrosive carbonic acid that forms in the condensate due to the thermal decomposition of the natural alkalinity in the boiler makeup water.
Why is my boiler flooding?
The boiler’s water line is surging. Dirty water, a too-high pH, overfiring and improper near-boiler piping can all cause the boiler’s water line to surge up and down. If there’s an automatic water feeder on the boiler, it will open and close each time the water line rocks. Before long, you’ll have a flooded boiler.
How do you clean a steam boiler?
Step 1: Pour some trisodium phosphate (which is a general cleaning agent) into your boiler, adding about one and a half cups of the solution for about every 200 litres of water. Instead of trisodium phosphate, you could also use sodium hydroxide or sodium carbonate.
How do I stop my boiler from foaming?
The degree of priming also depends on the design of the boiler and its steaming rate. 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 silica in my boiler water?
The most common and effective technique for removing granular silica from boiler water is lime softening. This process involves adding lime, also known as calcium hydroxide, to the water. Lime acts like a water softener for silica, causing calcium and magnesium — the particles that cause hardness — to precipitate out.
What causes boiler corrosion?
Boiler corrosion happens when any iron that is present in the boiler system is exposed to oxygen and water. This combination causes a chemical reaction that ultimately leads to the formation of rust and disintegration of the metal in the boiler tubes and related pressure parts.
What is priming and foaming in boiler?
Boiler water carry-over is the contamination of the steam with boiler-water solids. Bubbles or froth actually build up on the surface of the boiler water and pass out with the steam. This is called foaming and it is caused by high concentration of any solids in the boiler water.
How do you drain water from a sight glass?
Slowly open the drain valve of your sight glass, then open the drain valve and allow all the water to drain. To make sure all the water is out of the sight glass, open the top gauge valve just a tiny bit and let the steam pressure blow any remaining water out.