rb bertomeu, S.L.

 Pol. Ind. Fondo de Llitera, Par. 82-83

E-22520 Fraga, Huesca (SPAIN) 

Tel. +34 974 47 48 04

+34 630 43 08 43



n. 5   


Deposited residues of combustion of whatever type (a coating of metallic salts or soot) on the tubing of heat exchangers reduce the coefficient of heat exchange, increasing loss of energy in the form of hotter gases emitted into the atmosphere. This can produce both the following effects:

1- Increased fuel consumption to produce the same quantity of steam.
2- Reduced production of steam when using the same quantity of fuel.

Published studies on this subject apply the following data on heat losses and increased fuel consumption to produce a given quantity of steam, according to the thickness of the coating of residues or soot deposited on the wall of the heat-exchanger tubing:

              Thickness of           Increase in heat loss         Increase in
              coating / soot            in gases emitted          fuel consumption
                   mm                                 %                                          %            
                    0.8                               8 / 12                                2.0 / 2.5
                    1.6                             12 / 24                                2.5 / 4.5
                    3.2                             20 / 48                                4.0 / 8.5

In order to minimise the formation of incrusted residues on tubing of the boiler heat-exchangers on the exhaust gas side, and to allow swift cleaning, it is necessary to apply treatments to the fuel (especially in the case of fuel oil) which reduce the quantity of unburned particles (soot) and generate inorganic residues (coating of residues) that are crumblier and less adherent.
For installations with steam boilers, treating fuel oil with the additive “rb bertomeu” beco F2/A Concentrated and treating diesel fuel with “rb bertomeu” beco F-Plus Concentrated fulfils both these requirements, as the additives combine components to improve combustion with organic salts of magnesium to raise the melting point of the inorganic ash (that is, the coating of residues). This treatment, in addition to reducing fuel consumption, prevents corrosion on tubing, reduces coking on burners and reduces the formation of fuel sludge.

For further information on this subject, consult the following documents compiled by rb bertomeu (by clicking on the chosen title):

- Residual incrustation on steam boilers
- Reference letter from clients : CONSERVERA DE ESTEIRO (05-02-2001)
- Reference letter from clients : MINERA DE SANTA MARTA (25-08-1999)
- Reference letter from clients : INDUSTRIAS DEL CUARZO (17-01-2001)
- Reference letter from clients : GRANJA CASTELLO (11-10-1996)






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