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 are the common boiler feed water treatment issues?
Common Boiler Feed Water Treatment Issues and How to Avoid Them. 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.
Which water treatment process is best for 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.
What chemicals you should apply on boiler feed water?
Feed Treatment Chemicals
| Sodium | Hydroxide |
|---|---|
| Calcium | Bicarbonate (CaCO3 + Na2CO3) |
| Magnesium | Bicarbonate |
| Magnesium | Chloride. |
| . | . |
What is the pH of boiler feed water?
between 7 and 9
An important element of boiler feedwater treatment is controlling corrosion by keeping the boiler water slightly alkaline, between 7 and 9 on the pH scale.
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.
What is boiler problem?
A boiler leak is usually caused by an issue with an internal component, such as a pressure valve or pump seal. If the leak stems from your pressure relief valve, it is likely that your system’s pressure has become too high. Should the leak be due to a problem with the pump seal, the seal could have worn out.
What is the pH value of boiler water?
Boiler pH. Natural water is usually between 6.5 and 7.5 pH. A common recommendation is to maintain boiler water at 8.5 pH.
Why sodium triphosphate is added in boiler water?
Phosphate compounds are common additives for boiler water treatment. Sodium sulfite is another common oxygen scavenger that is added to the feed water. Chelants and polymer compounds also address residual impurities by keeping them in solution. Compounds that remain in solution can then be eliminated by blowdown.
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 boiler feed system?
A feed system, is nothing but a cyclic process that takes place between the turbine and the boiler . 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: There are basically two main types of feed systems :
What is boiler water?
Boiler water. Boiler water is liquid water within a boiler, or in associated piping, pumps and other equipment, that is intended for evaporation into steam. The term may also be applied to raw water intended for use in boilers, treated boiler feedwater , steam condensate being returned to a boiler, or boiler blowdown being removed from a boiler.
