Industrial Boiler feed water in water treatment.
In the USA market alone it is estimated the manufacturing industry consumes over 400 millions of gallons per day (MGD) of water to produce steam. Approximately 60 millions of gallons per day (MGD) of water is sent to the blow down drains in manufacturing. Another approximate 300 millions of gallons per day (MGD) of steam is consumed for direct injection. All this steam required in manufacturing shares the same common need, “water”. But not only water but “purified and treated” water is needed. For without the treatment process US manufacturers would face constant shut downs and increased capital spending driving their cost of goods through the roof. One form of water treatment to protect boilers is degasification and deaeration.
Degasification towers remove
hydrogen sulfide (H2S) and carbon dioxide (CO2), and quite often dissolved oxygen (DO). Removing dissolved corrosive gases is critical to the life and efficiency of the boiler and if the gases remain in the boiler feed water such as carbon dioxide (CO2) it will create a recipe for disaster, higher operating cost, and a reduced life for the boiler system. The carbon dioxide (CO2) will convert into carbonic acid and form a corrosive condition for the boiler and other critical components. If a boiler system is operating an ion exchange process prior to the boiler the regeneration cost will increase dramatically because the resins will be consumed by the carbon dioxide (CO2). In addition to preserving and increasing the life of the resin the removal of the carbon dioxide (CO2) will elevate the pH of the water without the addition of other chemicals again lowering the operating cost of the system.
The selection of what type of Degasification tower
system should be based on the specific applications, site conditions, and water chemistry. You will normally see a degasification tower utilized downstream or post treatment of a reverse osmosis system and prior to an Ion exchange cation or anion system. The reasons are simple, the degasification tower system is the most reliable and economical method to water treatment to safeguard your boiler and the feed system.
There are two types of degasification towers and they are referred to as “Induced Draft” or “Forced Draft”. An Induced type of degasfication tower pulls the air up and through the tower and the gases pass through the blower. On a forced draft degasification tower the blower pushes the air up and through the tower and the blower is only exposed to fresh intake air. In most industrial applications you will find “Forced Draft” type units. Both types of degasification towers perform the same and at DeLoach Industries we have tested both types with our other pre-and post-treatment systems and had similar results but the forced draft type system allows the designer and customer to push the exhaust air either out of a facility or into an additional treatment system for air emission control when needed. To learn more and for more information or to learn more contact the professionals at DeLoach Industries Inc. at (941) 371-4995.
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