Water Treatment Chemicals for Steam Boilers
The most importand problems in a steam generating system is the Scale and Sludge Deposits, the Corrosion, the Foam and the Carry Over. ADTEC Chemicals range of Boiler Water Treatments includes oxygen scavengers, scale and corrosion inhibitors, condensate line treatments, pH adjusters, antifoams and sludge control agents.
Water Treatment Chemicals
for Steam Boilers
A Steam Boiler is a closed vessel in which water under pressure is transformed into steam by the application of heat. In the boiler furnace, the chemical energy in the fuel is converted into heat, and it is the function of the boiler to transfer this heat to the contained water in the most efficient manner. The boiler should also be designed to generate high quality steam for plant use.
A boiler must be designed to absorb the maximum amount of heat released in the process of combustion. This heat is transferred to the boiler water through radiation, conduction and convection. The relative percentage of each is dependent ulpon the type of boiler, the designed heat transfer surface and the fuels.
Steam Boiler Types
Two principal types of boilers are used for industrial applications:
- Fire tube boiIers-Products of combustion pass through the tubes, which are surrounded by water.
- Water tube boilers- Products of combustion pass around the tubes containing water. The tubes are interconnected to common channels or headers and eventually to a steam outlet for distribution to the plant system.
The most importand problems in a steam generating system is the Scale and Sludge Deposits, the Corrosion, the Foam and the Carry Over
Common feedwater contaminants that can form boiler deposits include calcium, magnesium, iron, copper, aluminum, silica, and (to a lesser extent) silt and oil.
The most common deposits are :
Corrosion is one of the main causes of reduced reliability in steam generating systems. It is estimated that problems due to boiler system corrosion cost industry billions of dollars per year.
Methods of corrosion control vary depending upon the type of corrosion encountered.
The most common causes of corrosion are :
These problems may be controlled through the following procedures:
From the water side the problems in a steam boiler can be controlled through the following procedures:
External treatment, as the term is applied to water prepared for use as boiler feed water, usually refers to the chemical and mechanical treatment of the water source. The goal is to improve the quality of this source prior to its use as boiler feed water, external to the operating boiler itself. Such external treatment normally includes:
Any or all of these approaches can be used in feed water or boiler water preparation.
Even after the best and most appropriate external treatment of the water source, boiler feed water (including return condensate) still contains impurities that could adversely affect boiler operation. Internal boiler water treatment is then applied to minimize the potential problems and to avoid any catastrophic failure, regardless of external treatment malfunction.
Basically involves the use of chemical additives.
ADTEC Chemicals range of Boiler Water Treatments includes oxygen scavengers, scale and corrosion inhibitors, condensate line treatments, pH adjusters, antifoams and sludge control agents.Our range of both traditional and technically advanced products includes the following:
Monitoring and Testing
Effective corrosion control monitoring is essential to ensure boiler reliability. A well planned monitoring program should include the following:
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