What is feed water treatment?
Feedwater treatment is a pre-water treatment process to control deposition, eradicate impurities and prevent corrosion within a boiler system. In a boiler system, water is transformed into steam and expands by as much as 1000 times as it passes through steam pipes at rates of 100km/hr.
How does a feed water system work?
The feed water is put into the steam drum from a feed pump. In the steam drum the feed water is then turned into steam from the heat. After the steam is used it is then dumped to the main condenser. From the condenser it is then pumped to the deaerated feed tank.
What does a boiler feed water treatment system typically remove?
Reverse osmosis (RO) and nanofiltration (NF) are often used down the line in the boiler feed water treatment system process so most of the harmful impurities that can foul and clog the RO/NF membranes have been removed.
What is Calgon treatment of boiler feed water?
Calgon = sodium hexa meta phosphate The process involves the addition of calgon to boiler water. It prevents scale and sludge formation by forming highly soluble calcium hexa meta phosphate complex compound with CaSO4. 4) Describe the demineralization process of softening of hard water.
What are the types of boiler feed water treatment?
There are many types of external treatment (softening, evaporation, deaeration, membrane contractors etc.) which can be used to tailor make feed-water for a particular system. Internal treatment is the conditioning of impurities within the boiler system.
What are the requirements for 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 problems of boiler feed water?
Common issues found on boiler due to feed water quality
- CORROSION. 1.1 Pitting Corrosion. 1.2 Stress Corrosion.
- Common issues found on Boiler feed water due to scaling.
- Common issues found on Boiler feed water due to carryover.
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 is the purpose of the hydrazine test for boiler water?
Amerzine test ( Hydrazine test ) To know reserve hydrazine (N2H4 ) ppm and to prevent corrosion and aeration. To minimize oxygen pitting and corrosion in boiler, steam and condensate system.
Why calgon is better than phosphate conditioning because?
Expert-verified answer In calgon Conditioning, the added calgon forms soluble complex compound with CaSo4, thereby it prevents the scale and sludge formation in water. this soluble complex does not cause any problem in boilers.
What is the commercial name of calgon?
sodium hexa metaphosphate N
Calgon is the commercial name of sodium hexa metaphosphate Na2[Na2(PO3)6].
How do you remove oxygen from boiler feed water?
Heat is the most common method for removing oxygen. Typical deaeration for smaller boilers utilizes a spray or combination spray and tray system to remove oxygen. The feed water is sprayed into a stream of 5 psig steam for efficient heat transfer and subsequent oxygen removal.
What is a boiler feed water treatment system?
A boiler feed water treatment system might be made up of the technologies necessary to remove problematic dissolved solids, suspended solids, and organic material, including any number of the following: Calcium: can cause scaling in several forms depending on the chemistry of the boiler feed water (e.g. calcium silicate, calcium phosphate, etc.)
Why choose FTS water treatment?
Trusted. Experienced. Efficient. For over 30 years, the experienced team at FTS has helped companies of all sizes with their water treatment needs for boiler systems, cooling towers and wastewater treatment systems.
What is boiler feed water softening?
It is a partial softening process that is also economical for adjusting the boiler feed water pH. Reverse osmosis (RO) and nanofiltration (NF) are often used down the line in the boiler feed water treatment system process so most of the harmful impurities that can foul and clog the RO/NF membranes have been removed.
How do chemical feed systems prevent corrosion?
Chemical Feed Systems. Reverts to water in presence of light. Sodium Hexametaphosphate. Tiny quantities in water (1 or 2 mg/l) will react with metals such as calcium to coat metal pipes and fixtures to prevent corrosion. Phosphate is a plant nutrient thus favored for corrosion in irrigation systems.