The Cleaning of smaller boilers

(domestic boilers running on domestic fuel)
Eliminate the different types of deposits: soot, coal tar, acids sulfates and metallic oxides.


 THE DIFFERENTS KINDS OF DEPOSITS

Since they run on a discontinuous mode (frequent thermostatic stoppages), these boilers are frequently clogged in different ways :
  • carbon-soot, black flake-like sediment, strongly isolating,
  • tar, greasy deposit, shiny aspect, blistered or hard,
  • acid sulfates, white/yellowish deposits, sticky and hard,
  • metallic oxides are often found in condensation boilers made of steel or carbon.
The origins of these deposits are many and diverse. To name but a few :
  • clogged fuel tanks,
  • worn jets or wrong choice of jet not in proportion with the boiler's capacity,
  • lack of respect for the golden rules of boilers,
  • Les défauts de tirage ou d'aération de la chaufferie
  • sulphur count in the fuel,
  • frequency and duration of thermostatic stoppage,
  • poor boiler maintenance.
Different deposits can be found in the one and same boiler.

There is no universal cleaning product that can destroy all these deposits at the same time. Each one of them needs a specific product, applied either on-load or off-load.

Based on an experience spanning more than 25 years in the treatment of industrial boilers, AIT DRIVEX has a range of chemicals adapted to each particular case.

Some of them have been tested in specialized labs as to their efficiency and innocuousness to the generators as well as to the environment.


 THE CHEMICAL TREATMENT FOR ON-LOAD BOILERS

This process is designed to prevent the accumulation of carbon-soot over the heat-exchangers of the boiler and in the smoke-pipes and, consequently, to keep production going at its best.

It consists in periodical pulverizations into the flame of the burner of a chemical reagent meant to lower the ignition temperature of the carbon (soot or tar), and generate their oxidation without burst of flame (these chemicals do not keep up the soot combustion).

The DRIVEX 2000 liquid reagent is particularly well adapted to the treatment of such deposits.

A mere garden sprinkler fitted with a stainless steel hose will suffice to treat a boiler correctly.


Furnace before injection
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Furnace during injection
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To be totally efficient, The Preventive Chemical Treatment must be used very regularly.

It is a help to mechanical soot-removal. It cannot be considered as a substitute to the mandatory soot-removal made by a professional


 CLEANING OFF-LOAD BOILERS

In accordance with the treated sediment, preference will be going to :
To improve the chemical's efficiency, it is recommended to operate on hot surfaces (60/70°C) when tars are still soft.
This chemical is applied through fine pulverization. Cleaning should end with a sweeping or the burner's re-ignition.
Apply the chemical with a fine pulverization over warm surfaces (›50°C). The acid/base reaction will generate a burst in the deposits and ease the migration of the chemical inside the deposits.
Sweep the residual deposits or re-ignite the burner.

In case of massive clogging, start the operation again until you get the wanted result.

The DISSOLVEX 100 chemical contains a film-forming element designed to protect the heat-exchangers during long-term stoppages. It is not necessary to rinse it with water.


Acid/base reaction = foam formation.
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A pin-boiler before cleaning
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Foam application
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Après application
mais avant rallumage du brûleur
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30 minutes après
le rallumage du brûleur
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Le foyer après l'intervention
avant aspiration des dépôts
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The use of DISSOLVEX 100 as foam is the best way to treat an entire boiler with a minimum amount of chemical.


Use a fine spray and imperatively rinse with water or neutralize with DISSOLVEX 100.



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