The energy sector and small-scale power generation sector, where the fuel-oil residue is used as the main fuel type, is an equally important field of potential application of F2-21 eeFuel additive.

Despite the growing tendency towards gasification of such objects in Russia, the fuel-oil residue consumption is still high. According to the results of 2011-2012, more than 5 million ton of fuel-oil residue was burned in Russia.

In addition to problems with outdated equipment that is present at most industrial facilities and operates at efficiencies of up to 70%, there is a pressing problem related to the quality of the fuel-oil residue itself.

Apart from quality M100 fuel-oil residue which meets the GOST requirements, the fuel-oil residues with a large percentage of watering, as well as the products with heavy cuts, are present in the market as well.

All of the above has an impact on the efficiency of fuel-oil residue combustion in the furnace, on the carbon formation on the heat-exchange surfaces and on the quality of exhaust gases.

In such a case, F2-21 eeFuel additive also acts as combustion promoter. However, the effect of the additive in a number of cases becomes apparent already after it was made component of the fuel-oil residue. Many tests on various fuel-oil residues have been performed in Russia, and they showed a tendency towards viscosity reduction of the fuel-oil residue. Depending on the quality of the M100 fuel-oil residue, viscosity reduction was within the range of 5-30%. This effect can by all means be considered positive since viscosity reduction facilitates the pumping quality of the fuel-oil residue by the pipelines and reduces the severeness of heating during preparation for combustion.

How does "F2-21 eeFuel" additive work?

The principle of operation of the boiler features a number of fundamental differences from that of a motorcar engine, but one thing is unchanged - fuel efficiency depends on its combustion efficiency.

Let's examine the process of the fuel-oil residue combustion in detail. The quality of combustion depends both on the quality of the fuel-oil residue itself and on the type of atomizer.

As can be seen on the diagram in Figure 4, if the fuel-oil residue is dispersed in the form of large droplets, it is not burning down completely. It results in carbon formation on the inner surfaces and increase of atmospheric emission of soot and particulate materials.

 

Carbon formation on the inside of the heat-exchange surfaces leads to reduced efficiency of the boiler/furnace, since it is an insulating material which reduces the heat transfer from the flame to the system. It is considered that 1 mm of the carbon deposit results in efficiency reduction by 1%.

At the same time, the atmospheric emission of soot and particulate materials contributes to the accumulation of harmful substances in the air that undermine the health of people, and in some cases even lead to lung diseases (asthma, cancer, etc.).

When F2-21 eeFuel additive is introduced into the fuel-oil residue, its principle of operation becomes similar to that of the principle of operation described above. The microexplosions of steam provide dispersion of a large droplet of the fuel-oil residue into a smaller droplets, which enables more complete hydrocarbon combustion and allows significantly reducing the atmospheric emission of soot and particulate materials (Figure 5).

 

In addition,  "F2-21 eeFuel"additive enables carbon deposit removing from the heat-exchange surfaces. This is also due to surface “steam cleaning”. To see the illustrations of this effect, refer to Figures 6 a, b; 7 a, b, obtained based on the results of operational testing.

Impact of F2-21 eeFuel additive on performance of boiler/furnace:

F2-21 eeFuel additive allows to increase significantly the operational characteristics of the fuel-oil residue positively influencing the operation of the boiler/furnace:

  • Reduced specific consumption of the fuel-oil residue
  • Efficiency of the boiler/furnace is increased
  • The inside heat-exchange surfaces are cleaned
  • The quality of atmospheric emissions is increased

Testing of "F2-21 eeFuel" additive

F2-21 eeFuel additive successfully passed the pilot-scale tests at one of the largest Russian manufacturing enterprises which belong within top 10 users of the fuel-oil residue. The tests were performed on TP-35 and GM-50 boiler units.

We have called the specialists of the OJSC “All-Russian Thermal Engineering Institute” as independent experts to carry out the control measurements and supervise the progress of the tests.

The measurement of values of pollutants in flue gases was analyzed and the efficiency of use of F2-21 eeFuel additive during the combustion of fuel-oil residue of grade M-100 was assessed within the scope of this work. The following results were obtained:

  • Reduced specific consumption of fuel per unit of heat energy from 7 to 12 %;
  • Reduced thickness and decreased mechanical strength of deposits on the inner heating surfaces of the boiler units by 60-80%;
  • Significant reduction of the particulate materials in the flue gases from 31 to 51%.