JPS6011074B2 - Method for producing emulsion fuel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing emulsion fuel consisting of oil and water.

It is well known that the combustion efficiency of heavy oil can be increased by mixing it with water to create emulsion fuel.

However, when the ratio of low viscosity water to high viscosity heavy oil is 15% or more, especially 30% or more, the machine is rotated inside the tank and becomes a situation where the arm is pressed against the noren curtain. Therefore, there is a problem in that the sea bream shearing force applied to the mixed liquid is not sufficiently transmitted to the entire liquid, making it impossible to form a sufficient emulsion. This trend is more pronounced for heavier fuel oils with higher viscosity.
In particular, when it comes to C heavy oil whose viscosity at 5 and 0 is higher than 5 ratio St, it becomes almost impossible to form an emulsion at room temperature. The purpose of the present invention is to solve the above-mentioned problems, and to make it possible to obtain high-quality emulsion fuel by mixing and emulsifying not only light fuel oil but also heavy fuel oil with high viscosity at room temperature with a high proportion of water. An object of the present invention is to provide a method for producing emulsion fuel that enables the production of emulsion fuel.

The method for producing emulsion fuel of the present invention that achieves the above object includes a liquid pump and a motionless mixer connected in series in this flow order to form a circulation circuit, and a mixture of oil and water in the circulation circuit. The liquid is supplied and circulated to form an emulsion, and a part of the emulsified circulating liquid is taken out from the circulation circuit, and the amount of circulation Q in the circulation circuit is made larger than the amount q taken out from the circulation circuit. This feature is set as follows.

In the present invention, it is preferable that the circulation amount Q of the emulsified circulating fluid circulating in the circulation circuit is considerably larger than the amount q taken out from the circulation circuit, and preferably, it is twice or more of q. good. DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below with reference to embodiments shown in the drawings.

The figure is a schematic diagram showing an example of a device implementing the present invention,
1 is a supply pipe that supplies heavy oil ○, and 2 is a supply pipe that supplies water W.

The supply pipes 1 and 2 are provided with liquid pumps 3 and 4, respectively, with relief valves 5 and 6 interposed therebetween, and valves 7 and 8.
and flowmeters 9 and 10 are provided. Supply pipes 1, 2
is joined at its end into a merging pipe 11 having a motionless mixer 12. A circulation circuit 13 is connected to the end of the merging pipe 11, and the circulation circuit 13 is further provided with an extraction pipe 14. 15 is a control panel for setting the mixing ratio of heavy oil ○ and water W, and flowmeters 9 and 10
The ratio of the valves 7 and 8 is controlled based on the flow rate signal, and the mixing ratio of heavy oil ○ and water W is maintained at a predetermined constant ratio.

Further, the circulation circuit 13 is configured by a liquid feeding pump 16 and a motionless mixer 17 connected in series in this order in the liquid feeding direction. This circulation circuit 13 may be provided with a heating device if necessary. The motionless mixers 12 and 17 are so-called static mixers that do not have moving parts, and for example, fixed blades that change the flow path are installed in the pipes so that the separation, phase inversion, and recombination of fluids are repeated. Any known method can be applied.

In the above-mentioned device, when heavy oil ○ is supplied from the supply pipe 1 and water W is supplied from the supply pipe 2 at a predetermined ratio set by the control panel 15, the heavy oil ○ and water W are supplied to the joint pipe. After merging at 11, motionless mixer 12
Primary mixing is performed by The mixed liquid that has undergone the primary mixing is then pressurized by the liquid feeding pump 16 in the circulation circuit 13, and is finely emulsified while passing through the motionless mixer 17 multiple times while circulating in the circulation circuit 13. go. While this mixed liquid is repeatedly circulated, a certain amount of the emulsified circulating liquid is taken out to obtain emulsion fuel. The extracted emulsion fuel is then sent to a combustion device (not shown) where it is needed. Circulation circuit 1 above
The circulating amount Q of the mixed liquid in step 3 needs to be larger than the amount q taken out from the take-out pipe 14, and is preferably set to be at least twice the amount q taken out.

Here, the circulation amount Q means the flow rate in the circulation path from the outlet that takes out the flow rate q from the circulation circuit 13 to the supply port that supplies the mixed liquid to the circulation circuit 13. Therefore, the flow rate Q' of the flow path from the supply port of the mixed liquid to the circulation circuit 13 to the outlet of the flow rate q becomes Q'=Q10q. By making the circulation amount Q excessive compared to the on-base q in this manner, the number of circulation of the mixed liquid in the circulation circuit 13 increases, and emulsion formation by the motionless mixer 17 is highly promoted. Therefore, the mixing ratio of water W to heavy oil 0 is 1
When the amount is 5% or more, the viscosity of heavy oil ○ is of good quality with a viscosity of 5 ratio st or more at 50°C, and extremely good emulsification is achieved. Moreover, even high viscosity oil can be emulsified without overflowing. Further, according to the above-described method, the emulsion fuel can always be kept under pressure in the circulation circuit 13, compared to a conventional example having a structure having a circulation tank.

It is also possible to pressurize high-viscosity heavy oil to high pressure. Since such emulsion fuel is supplied to the combustion burner under high pressure, even in the case of high viscosity oil, it can be smoothly delivered to the combustion burner. In addition, high-temperature, high-pressure emulsion fuel can be delivered to the combustion burner while being maintained at a pressure and temperature above the boiling point of water at the combustion chamber pressure, so the water in the fuel is depressurized immediately after the combustion burner generates mist. This reduced-pressure boiling promotes the micro-explosion effect of water and further increases the combustion efficiency of heavy oil. In order to obtain such emulsion fuel more effectively, it is preferable to provide the heating device 18 in the circulation circuit 13 as described above. Also, according to the above method,
Amount q of the circulating amount Q in the circulation circuit 13 to be used for combustion
Since q is made sufficiently larger than q, it is possible to produce a good emulsion fuel even when q is small and low negative.

The present invention described above is particularly effective when the oil:water mixing ratio is 7:3 to 2:8.

As described above, in the emulsion fuel production method of the present invention, a liquid pump and a motionless mixer are connected in series in this order to form a circulation circuit, and a mixed liquid consisting of oil and water is supplied to the circulation circuit. While supplying and circulating the emulsion, part of the emulsified circulating fluid is taken out from the circulation circuit, and the circulation amount Q in the circulation circuit is set to be larger than the amount q taken out from the circulation circuit. As a result, even if the oil is a young oil with high viscosity, it can be mixed with a high proportion of water to form an emulsion at room temperature, and a high-quality emulsion fuel can be obtained.

Furthermore, since it is easy to obtain high-temperature, high-pressure emulsion fuel, water in the fuel can be boiled under reduced pressure when it is atomized from a combustion burner, promoting the micro-explosion effect and further increasing combustion efficiency. In addition, high-quality emulsion fuel can be obtained at any time with low negative energy. The place according to the present invention is provided with the circulation circuit 13 of the embodiment diagram.

Emulsion fuel was produced according to the conditions shown in the table below for the case where the circulation circuit 13 was not provided. Front midboard. 1
5 corresponds to an example of the present invention, and lung. 6 to 9 correspond to comparative examples in which the circulation circuit 13 is not provided. As is clear from the results in the table, good emulsification was achieved in the case of the present invention.

[Brief explanation of the drawing]

The figure is a schematic diagram showing an example of an apparatus for carrying out the present invention. 1... Supply pipe (oil), 2... Supply pipe (water), 11.
...Merge pipe, 12...Motionless mixer, 13...
Circulation circuit, 14... take-out pipe, 16... liquid pump,
17...Motionless mixer.

Claims (1)

[Claims] 1. A liquid pump and a motionless mixer are connected in series in this order to form a circulation circuit, and a mixed liquid consisting of oil and water is supplied to the circulation circuit and circulated to form an emulsion. At the same time, a part of the emulsified circulating fluid is taken out from the circulation circuit, and a circulation amount Q in the circulation circuit is set to be larger than an amount q taken out from the circulation circuit. Method for producing emulsion fuel. 2. The method for producing emulsion fuel according to claim 1, wherein Q/q is 2 or more.