An example of an inorganic oxygen scavenger is sulphite, whereas examples of organic oxygen scavengers are tannin, DEHA, and carbohydrazide. Reducing oxygen One method used to reduce the amount of oxygen in boiler feed water is to maintain as high a temperature as possible.
Accepta 2899 is a high performance “neutral” tannin based boiler water oxygen scavenger scientifically formulated for use in steam boilers and boiler feed water systems. Accepta 2899 is not dependant on the feed water temperature and being organic it does not add to the boiler water conductivity so reducing the need for blowdown (compared with sulphite).
Accepta 2812 is a high-performance tannin based boiler water oxygen scavenger scientifically formulated for the treatment of steam boilers and feedwater systems. Accepta 2812 is not dependant on the feed water temperature and being organic it does not add to the boiler water conductivity so reducing the need for blowdown (compared with sulfite).
Tannin has proven itself to be highly effective against oxygen corrosion due to its nature as an oxygen scavenger, by removing the oxygen from the boiler. Due to this, feed tank corrosion cannot set in prolonging the life of the boiler substantially. Additionally Tannin will form a thin corrosion resistant tannate film across the boiler surface.
• The addition of oxygen to a system with water and heat will initiate corrosion. • Heat, found in the feed water system, is a driving force for corrosion • Mechanical deaeration, can remove most, but not all of the oxygen from the water. • An oxygen scavenger is used to eliminate the remaining oxygen. • Properly applied, oxygen
Boiler water oxygen scavenger based on tannin from Accepta. Accepta 2212 is formulated as a mildly alkaline blended liquid treatment based on organic tannin developed for use in steam boilers and other boiler systems. It should be used in conjunction with other supplemental feedwater treatments to give a balanced treatment programme
Apr 29, 2020· Oxygen scavenger, continously injected to maintain a reserve within the boiler of 0.02 to 0.1 ppm and a feed water O 2 content of less than 10 ppb At temperatures greater than 350 o C, will decompose to ammonia and nitrogen and will aid in maintaining balanced alkalinity in steam piping.Steam volatile, neutralises CO 2
It is a volatile liquid and is normally supplied commercially for boiler applications as a 15% or 35% solution in water. It reacts with oxygen to form nitrogen and water. Hydrazine, N2H4, has been used for many years for preventing corrosion of boiler plant. "Chemical oxygen scavengers: use of hydrazine and tannins for boiler water
Whilst often seen as a traditional boiler water treatment chemical, Feedwater tannin products use high-quality freeze-dried tannin extracts, chosen specifically for their oxygen scavenging performance and which are blended with state of the art polymer sludge conditioners and alkalinity builders.
Steam Boiler Tannin - Accepta 2319 is a superior, blended liquid water treatment product based on organic tannins, polymer sludge, conditioners and alkali. Developed for steam boilers and LPHW systems, Accepta 2319 can be used with softened or moderately hard make-up, and in many instances provides a complete balanced treatment by itself
Whilst often seen as a traditional boiler water treatment chemical, Feedwater tannin products use high quality freeze-dried tannin extracts, chosen specifically for their oxygen scavenging performance and which are blended with state of the art polymer sludge conditioners and alkalinity builders.
Tannin based oxygen scavenger (12.5L) is ideally suited to low temperature feed waters since the dose rate is not dependant on the feed-water temperature (compared with sulphite) and being organic it does not add to the boiler water conductivity.
Oxygen Scavengers. A major cause of corrosion in boilers is dissolved oxygen, particularly in conjunction with low pH (low alkalinity) although excessive alkalinity can also be a factor. Chemical oxygen scavengers are used to eliminate oxygen from the feed water. The main types of oxygen scavenger are shown below:
Deciding on the best chemical treatment for your boiler system. All good boiler water treatment regimes include a chemical oxygen scavenger to remove the residual oxygen from the boiler feed water in order to protect not only the boiler but also control corrosion in the hotwell (or feed tank) and the condensate return lines.
This is achieved by keeping a controlled level of alkalinity in the boiler at all times, and by removing oxygen by de-aeration in the boiler feed tank. In most cases an oxygen scavenger will also be used. The most common types of oxygen scavenger are sodium sulphite and sodium bisulphite, other organic chemicals may also be used.
OT-141 is a high performance tannin based boiler water oxygen scavenger. OT-141 is scientifically formulated as a mildly alkaline blended liquid treatment based on organic tannin and developed for use in steam boilers and other boiler systems.
WTPS28 is a formulated blend of selected natural tannins. WTPS28 is a convenient liquid oxygen scavenger and is recommended for use in steam boiler plant, feedwater storage tanks and closed circuit heating systems. WTPS28 provides corrosion control by scavenging oxygen and by forming a protective iron/tannate film.
As for tannin, this chemical will remove oxygen from the water while also creating a corrosion resistant-film around the steel of the boiler. The exact dose of an oxygen scavenger that you should use in your boiler depends on the type of scavenger that you’re using and …