Abstract
This report dwells on the scientific study of the vortical device. The device is designed for efficient combustion of fossil fuels. Oil-water emulsion was taken as an example of alternative fuel. Although the functionality of the burner device is not limited to this fuel only. The innovative burner device under investigation is based on principal of vortical motion of fuel air mixture. There is a precombustion chamber specially designed, where inflammation and partial combustion of the swirling flow takes place. The article describes experiment on defining the geometric dimensioning of the burner discharge nozzle in relation to a combustion chamber. The position of the outlet nozzle inside of the burner is the main input parameter of this research. The authors analyzed the influence of this parameter on the pressure inside the combustion chamber and the electric load of the fan for the supplying combustion air. The position ranged from 0 to 120%. The optimal position is at 50% of the total length of the burner chamber. The pressure graph has an extremum in this position, and the electric energy consumption by the fan changes less significantly with further deepening of the output nozzle than earlier. The Results are presented for cold (air blowing only) and hot experiment (burning). This experiment proved the need for the design of the inner part of the discharge nozzle, which is a design feature of the burner device for which the European patent was obtained. The patent link is presented in the list of references.
Highlights
Today, fuel-oil residual is used as a backup and sometimes primary fuel in most of the traditional thermal power plants in the world.Fuel-oil residual is a type of oil fuel obtained from heavy refinery residues
Water can be contained as simple suspensions, it is settled during storage, or in the form of a stable emulsion
Due to the part of the discharge nozzle extending inside the friction occurs in contact area of the main vortex of zone A with the reverse currents of zone B, as a result of which the overheating of the prechamber was almost completely eliminated
Summary
Fuel-oil residual is used as a backup and sometimes primary fuel in most of the traditional thermal power plants in the world. Creating a water-oil emulsion with a stable degree of homogeneity allows us to burn the mixture effectively without separating the fuel from the water [2,3,4,5]. The role of the aerodynamic structure of the flow is to ensure a perfect mixture of fuel and oxidizer, without which neither the intensity of the combustion process nor the completeness of the heat release can be achieved. The proposed burner device allows the stable burning of a water-oil emulsion with a moisture content of up to 30% due to intensive mixing of fuel and air. Due to the part of the discharge nozzle extending inside the friction occurs in contact area of the main vortex of zone A with the reverse currents of zone B, as a result of which the overheating of the prechamber was almost completely eliminated. An innovative cyclone-vortex burner is simple to manufacture and reliable in operation and modernization of the boiler does not require a significant investment
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