JPS6046332B2 - Atomization method for liquid fuel, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for atomizing heavy oil, other liquid fuels, combustible sludge, and the like.

As techniques for atomizing combustion oil, there are known methods such as a method of atomizing oil using a high-pressure swirl, a method of atomizing oil using an atomizing medium such as steam, and others.

When these methods are applied to atomization of heavy oil,
In the former method, the atomization efficiency decreases significantly as the viscosity increases, and in the latter method, the spray medium and high viscosity oil are not sufficiently mixed, so even if a large amount of medium is used, the desired particle size cannot be achieved. It was not possible to atomize the particles to such an extent that it was not only disadvantageous in terms of energy cost, but also caused combustion to become unstable due to the large amount of medium used. This invention is
The object of the present invention is to provide a method that can efficiently atomize heavy oil to a desired particle size.

That is, the present invention involves mixing water into a combustible material such as liquid fuel or combustible sludge to form an emulsion, pressurizing the resulting emulsion, and further increasing the temperature at a pressure higher than the boiling point of water at the internal pressure of the furnace to be injected. This is a method of heating an emulsion to a temperature of There is a method for atomizing liquid fuel, etc., which aims at promoting the reduced pressure boiling phenomenon by supplying the generated hydrogen and oxygen gas into the furnace. In the above, the amount of water added is preferably 10 to 5% by weight of the material to be burned, and after addition, both are thoroughly mixed in a line mixer.

Note that the resulting emulsion cannot be sufficiently atomized by the above-described high-pressure swirl atomization method or the atomization method using a medium. However, when the emulsion fuel is burned, the water contained in the fuel droplets boils and the fuel droplets are re-atomized. Therefore, flammability is improved and the concentration of dust particles is reduced. Electrolysis of the emulsion is performed by an electrolyzer installed within the burner. Note that emulsion fuel, which is made by emulsifying heavy oil, was developed with the aim of saving energy and reducing pollution. The reduced-pressure boiling phenomenon occurs by pressurizing a liquid and heating it to a temperature equal to or higher than the boiling point of water under pressure outside the system, and then discharging the pressurized heated liquid to the outside of the system.

Even if only the vacuum boiling phenomenon is applied to atomize heavy oil, the intended purpose will not be achieved. The reason for this is that high pressure and high heat are required in this case, which causes some of the heavy oil to thermally decompose and turn into coke in the heater, and a gas-liquid two-phase flow to occur due to the decomposition product gas, resulting in the amount of spraying. This is because it becomes difficult to control.
A suitable heating temperature is 120 to 180°C. As described above, the atomization method according to the present invention combines emulsification of the combustible material with additives such as water and alcohol, and reduced pressure boiling phenomenon, so that the combustible material has its own boiling point. It is atomized at temperatures lower than .

Therefore, atomization can be efficiently achieved without causing any problems such as thermal decomposition of the oil or coke formation of the oil in the heater. Furthermore, since there is no need to use a spray medium such as steam or air, it is advantageous in terms of energy cost and combustibility is stable. Furthermore, since water is electrolyzed, by further promoting the reduced pressure boiling phenomenon, the particle size of the generated fine particles can be significantly reduced, and
Generation of dust due to combustion can be suppressed as much as possible. Example As shown in FIG. 1, heavy oil with a viscosity of 1301)p(150) and water in an amount of (a)% by weight of the oil were pumped from oil tank 1 and water tank 2 through pumps 3 and 4, respectively. are fed under pressure to the line mixer 5, where they are mixed to form an emulsion.

This emulsion is heated to 130 to 150°C with a heater 6 and sprayed into a furnace 8 from a burner 7. The heavy oil pulverized in this way is burned in the furnace 8. Also, in burner 7,
As shown in FIG. 2, an electrolysis device 9 is provided.

It consists of an anode shaft 10 connected to a power source and a cathode section 11 consisting of the burner body. Then, the emulsion is electrolyzed using this electrolytic burner and supplied into the furnace. The average particle size of generated fine particles at different emulsion temperatures and the dust concentration during combustion are measured during electrolysis and non-electrolysis.

The results are shown in Tables 1 and 2, respectively. As can be seen from the above tables, by electrolysis of water, the particle size of the generated fine particles can be significantly reduced, especially in the low heating degree region, and the amount of dust can be significantly reduced.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, with FIG. 1 being a system diagram and FIG. 2 being an enlarged view of the burner.

Claims (1)

[Claims] 1. Water is mixed into combustible material such as liquid fuel or combustible sludge to form an emulsion, the resulting emulsion is pressurized, and the emulsion is heated to a temperature higher than the boiling point of water at the internal pressure of the furnace to be injected. A method of atomizing materials to be combusted by heating, and then injecting and supplying a pressurized heated emulsion into a combustion furnace by the depressurized boiling phenomenon of water, in which hydrogen and oxygen produced by electrolyzing the water in the emulsion are used. A method for atomizing liquid fuel, etc., characterized by promoting a depressurization phenomenon by supplying gas into a furnace.