RU2205203C1 - Fuel composition production method - Google Patents

Abstract

FIELD: fuel oils. SUBSTANCE: prior to be burned fuel oil is converted into water-mazut emulsion, in particular water and mazut are passed into disperser onto functioning rotor at weight ratio 100:(5- 50). Water and part of mazut are introduced axially and remaining part of mazut radially at an angle 15-20 deg. to radial product discharge line. Utilized mazut with initial moisture content 1.6% is preheated to 40-95 C and water to 30-90 C. EFFECT: improved combustion characteristics and reduced fuel consumption. 3 cl, 2 ex

Description

 The invention relates to the preparation of boiler fuel for combustion, in particular the production of a water-oil emulsion (VME).

A known method of producing a fuel composition by mixing hydrocarbon fuel with water, followed by vibrocavitation treatment of the mixture in a homogenizer having a stator and a rotor at a mixture flow rate of not more than 0.2 m ³ / s per unit surface of the rotor and the peripheral speed of its rotation of not less than 12 m / s . Water is taken in an amount of 15-85% wt. / RU 2085270, C 10 L 1/32 /.

 A known method of producing a fuel composition by mixing fuel oil with water in a mass ratio of 100: 5-25 and dispersing the resulting mixture through a narrow gap between the rotor and the stator. The mixture is fed to the rotating rotor along the axial line to interrupt the continuous flow of components, and the finished mixture is discharged along the radial line, perpendicular to the axial. A water-oil emulsion is obtained with an average particle size of water of 3-10 μm / B.M. Ivanov and others. "Fuel emulsions and suspensions", M., 1963, p. 20, 56-57 /.

Closer to the present invention in essence and the achieved result is a method for producing a fuel composition by separately supplying water and fuel oil to a dispersant on a rotating rotor with subsequent removal of the finished product along a radial line, with all the water being supplied along the axial line, and the fuel oil being partially supplied along the axial and partially along the radial line at an angle of 25-35 ^o to the radial line for the removal of finished products. The mass ratio of fuel oil to water is 100: 5-25. It is advisable to supply all water and 40-80% of fuel oil along the center line, and 60-20% of fuel oil along the radial line.

 However, the dispersion of water particles in fuel oil is insufficient (RU 2136721, C 10 L 1/32).

 A disadvantage of the known emulsions is their low dispersion, significant emissions of nitrogen oxides, soot and carcinogenic hydrocarbons and increased fuel consumption.

 The aim of this invention is to increase the dispersion of water particles in a water-oil emulsion, as well as reducing fuel consumption and harmful emissions in its combustion products.

This goal is achieved by a method of producing a fuel composition by separately supplying water and fuel oil to the dispersant on a rotating rotor, including supplying water and part of the fuel oil along the axial line, another part of the fuel oil along the radial line at an angle to the radial discharge line of the finished product using fuel oil with an initial humidity of more 1.6% and pre-heating water to 30-90 ^o C. It is advisable to carry out the process with a mass ratio of fuel oil: water equal to 100: 5-50, and supply the fuel oil at an angle of 15-50 ^o , and also heat the fuel oil to 40-95 ^o C.

 The use of fuel oil with an initial moisture content of more than 1.6% and preheating of water in combination with other features of the invention allows to achieve a higher dispersion of the emulsion obtained (maximum particle size of water 0.5 μm) and, accordingly, reduce the amount of harmful oxides in the combustion gases of the fuel, in particular oxides N, C and S, a also reduce fuel oil consumption. In addition, there is no need for a high degree of dehydration of fuel oil.

 Example 1

 A water-oil emulsion is obtained directly for combustion.

From a supply tank, a fuel pump with a pressure of 1.9 MPa serves fuel oil with an initial moisture content of 5% at 80 ^o C in the dispersant. In this case, the flow is divided into two parts: 50% is directed along the radial line and 50% along the axial line. At the same time, water heated to 60 ^{° C. is} taken from the supply tank and in an amount of 15% is sent to the dispersant.

Fuel oil on a radial line serves at an angle of 30 ^o to the radial tap line. The finished fuel then goes through the nozzles for combustion into the boiler. When burning the resulting fuel, the amount of nitrogen oxides is 460 mg / m ^{3 of} fuel, the amount of sulfur oxides is 1.5 g / m ^{3 of} fuel. The particle size of the water in the emulsion obtained is 0.4 μm. Fuel consumption per fuel oil is 0.4 kg / s. The boiler efficiency is 95%.

 Example 2

 A water-oil emulsion is obtained for long-term storage.

From a supply tank with a fuel pump at a pressure of 2 MPa, fuel oil with an initial humidity of 10% at 75 ^{° C. is} supplied to the dispersant. The amount of fuel oil supplied along the center line is 70%, and on the radial 30%. The angle of fuel oil supply along the radial line is equal to 35 ^o to the line of radial removal of the finished fuel.

At the same time, water heated to 70 ^{° C. is} taken from the supply tank and fed to the dispersant in an amount of 15%. The result is a fuel emulsion stable for 65 days. The average size of the water droplets in the emulsion is 0.3 μm. When burning the resulting fuel, the amount of nitrogen oxides is 450 mg / m ^{3 of} fuel, the amount of sulfur oxides is 1.6 g / m ^{3 of} fuel with a fuel consumption of 0.42 kg / s. The boiler efficiency is 95%.

 Thus, when using the VME obtained by the proposed method, not only its combustion characteristics are improved in comparison with the prototype and fuel consumption is reduced, but the boiler efficiency is also increased.

Claims (3)

1. A method of producing a fuel composition by separately supplying water and fuel oil to a dispersant on a rotating rotor, including supplying water and part of the fuel oil along the axial line, another part of the fuel oil along the radial line at an angle to the radial discharge line of the finished product, characterized in that they use fuel oil with the initial humidity of more than 1.6% and the water is preheated to 30-90 ^o C. 2. The method according to p. 1, characterized in that the mass ratio of fuel oil: water is 100: 5-50, and fuel oil is fed along an radial line at an angle of 15-50 ^o . 3. The method according to p. 1, characterized in that the fuel oil is heated to 40-95 ^o C.