What do you mean by boiler feed water?
Feedwater is water that undergoes purification or preheating and is then supplied to boilers for hot water and steam production, or it can remain still. It is typically found in thermal power plants where it is stored and conditioned in tanks, known as boiler feedwater.
Which water is used as boiler feed water?
The steam or hot fluid is then recirculated out of the boiler for use in various processes in heating applications. The boiler receives the feed water, which consists of varying proportion of recovered condensed water (return water) and fresh water, which has been purified in varying degrees (make up water).
What are the requirements of boiler feed water?
The composition of boiler feed water must be such that the impurities in it can be concentrated a reasonable number of times inside the boiler, without exceeding the tolerance limits of the particular boiler design. If the feed water does not meet these requirements it must be pretreated to remove impurities.
What is the difference between feed water and boiler water?
Cooling water is used in industrial processes to dissipate large amounts of heat. Boiler feed water, on the other hand, is used in the water/steam circuit for electricity generation in power stations. The water has to meet specific requirements for both applications, which is why it is analyzed on a regular basis.
What are the 2 types of boiler feed water treatment?
The treatment of boiler water can be put into two parts. These are internal treatment and external treatment. (Sendelbach, p. 131) The internal treatment is for boiler feed water and external treatment is for make-up feed water and the condensate part of the system.
How do you treat a water boiler?
How Do You Treat Boiler 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.
How do I increase the pH of my boiler feed 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.
What are the main problems caused by boiler feed water?
The problems arising due to contaminated boiler feed water can be classified into two main types:
- Corrosion.
- Scale formation. Technically, both the above mentioned problems are interlinked. Both of them results in loss in boiler efficiency and can cause boiler tube failures and inability to produce steam.
How do you treat boiler water?
One of the most common and efficient combination treatments is the hot lime-zeolite process. This involves pretreatment of the water with lime to reduce hardness, alkalinity and in some cases silica, and subsequent treatment with a cation exchange softener.
How boiler water is being treated?
What is the pH of boiler feed water?
Boiler water should be maintained at pH 11. Generally, the higher the pH (basic), the less soluble some solids are in the water. The lower the pH (acidic), the more soluble these solids are.
How do I test the pH of my boiler water?
Boiler Water PH Test
- Rinse and fill the plastic 50ml beaker with sample water.
- After that is done, add 600mg of PH reagent (one scoop) to the water sample.
- Mix the reagent in the sample water to completely dissolve it.
- Next, take a PH indicator strip, dip it into the sample, and leave it submerged for one minute.
What do you need to know about boiler feedwater?
Boiler feedwater treatment. The boiler water needs to be alkaline and not acidic, so that it does not ruin the tubes. There can be too much conductivity in the feed water when there are too many dissolved solids. These correct treatments can be controlled by efficient operator and use of treatment chemicals.
What are the parts of the boiler feed system?
This cyclic process facilitates the exhausted steam to return to the boiler in the form of feed water. The feed system consists of four main parts: boiler. turbine. condenser. feed pump.
How is feedwater used in thermal power plants?
Feedwater is water that undergoes purification or preheating and is then supplied to boilers for hot water and steam production, or it can remain still. It is typically found in thermal power plants where it is stored and conditioned in tanks, known as boiler feedwater. Feedwater is also used in other…
What do you use to soften boiler feed water?
Depending on the type of filtration used, suspended particles can be removed down to under one micron. When pretreating boiler feed water, if there’s high hardness complexed with bicarbonates, sulphates, chlorides, or nitrates, a softening resin can be used.
What is the temperature of water in a boiler?
Water is the main thing that needs heating and boiler heats water ranging between 160 to 180 Fahrenheit and boiler parts are robust enough to handle extreme temperature fluctuations. Some boilers heat the water above 212 degrees Fahrenheit, which is the point where the water is turned into steam.
What is water treatment for boiler?
Boiler water treatment is a type of industrial water treatment focused on removal or chemical modification of substances potentially damaging to the boiler. Varying types of treatment are used at different locations to avoid scale, corrosion, or foaming.
What is the pH of boiler water?
Requirement PH value for boiler water and feedwater is generally above 7 (range between 8.5 and 9.8). It is recommended PH value to protect metal pressure part from corrosion attack.
How do you flush a hot water boiler?
Open the drain valve at the bottom of the hot water heater tank. Allow the tank to drain completely, flushing out flakes of mineral deposits along with the cooled water. Open a hot water tap close to the water heater, which helps provide some back pressure that assists in the draining process.
