JPS6210329B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid fuel combustion device, and more particularly to a liquid fuel combustion device that mixes liquid fuel and water in an appropriate ratio and burns the fuel efficiently at a predetermined discharge pressure. .

Liquid fuels such as petroleum are often used as heat sources for boilers and heaters. This liquid fuel is supplied from the fuel tank via a pump to pot-type burners, gun-type burners, and other all-flame burners, and is combusted. It is said to be around 80%, and the disadvantage was that the rest was dissipated as soot or unburned. Although there may be various causes for this non-combustion, it has been discovered that an appropriate amount of liquid fuel is not supplied to the burner at a predetermined pressure. Therefore, through many years of research, the present inventor has attempted to create a liquid fuel combustion device that mixes liquid fuel with an appropriate amount of water and supplies it to a burner at a predetermined pressure for efficient combustion. be.

An embodiment of the liquid fuel combustion apparatus of the present invention will be described below with reference to the drawings.

FIG. 1 is a mixing supply circuit for a liquid fuel combustion device.

This mixing circuit connects a water tank 13 to a water supply or a water supply source (not shown) via a pipe 10, an on-off valve 11, and a pipe 12. This water tank 13 is connected to the pipe line 1
4. Connected to a first mixer 19 whose details are shown in FIG. 2 via an electric pump 15, a pipe line 16, a check valve 17, and a pipe line 18.

Further, a liquid fuel tank 23 is connected to a liquid fuel source (not shown) via a pipe line 20, an on-off valve 21, and a pipe line 22. This liquid fuel tank 23 has a pipe line 2.
4, the electric pump 25, the pipe 26, the flow meter 27, the pipe 28, the check valve 29, and the pipe 30 to the first
mixer 19.

This first mixer 19 includes a nozzle part 31 that connects the pipe lines 18 and 30, a first mixing part 32 which is housed in a cylinder 19a and is made by twisting fins at a certain distance. Although not shown, at a small interval,
It is configured by providing a plurality of second mixing parts in which the fins are twisted in the opposite direction to the first twisting direction.

This first mixer 19 is connected to a mixing tank 34 via a pipe 31a, a solenoid valve 56, and a pipe 33, and stores a mixed liquid of liquid fuel and water.
This collected liquid mixture is transferred to the pipe line 35 and the electric pump 3
6. Connect via line 37 to a second mixer 38, the details of which are shown in FIG.

The second mixer 38 is housed in a cylinder 38a, and the first mixer 38 is made by twisting fins at a certain distance.
a mixing section 39, and a second mixing section 40 which is spaced apart from the first mixing section 39 and twisted in the opposite direction to the fins of the first mixing section; It is constructed by providing multiple locations alternately.

This second mixer 38 is connected via a pipe 41 to a burner 43 which is a combustor of a hot water boiler 42 . From the bottom of this burner 43, a conduit 44
is connected to the mixing tank 34 through a fuel tank 34 to allow unburned fuel to be returned for reuse. Conduit 4
A bypass circuit 45 is provided between the pipe 1 and the pipe 44, and the bypass circuit 45 includes a bypass valve 46.
Connect. The degree of opening and closing of the bypass valve 46 is controlled by the pressure of a pressure gauge 47 provided on the discharge side of the second mixer 38.

Note that 48, 49, and 50 are pressure gauges that measure the respective pressures of the supplied water, supplied fuel, and mixed liquid, and 51, 5
2 and 53 are liquid fuel tank 23 and water tank 1
3. Pressure regulating valves 54 and 55 are connected to a pressure source (not shown) via a pipe in order to keep the pressure in the mixing tank 34 constant, and to reduce pressure fluctuations in the liquid fuel tank 23 and water tank 13. , is an on-off valve connected to the output side of the electric pumps 25, 15 via a conduit.

Next, the operation of the liquid fuel combustion apparatus according to the illustrated circuit will be explained.

First, open the on-off valves 11 and 21, and open the water tank 1.
3 and liquid fuel tank 23 with appropriate amounts of water and liquid fuel. The supplied water and liquid fuel are used to adjust the pressure regulating valves 51, 52, etc. to adjust the hydraulic liquid fuel pressure in each tank to a constant value.

Next, the electric pump 36 is operated, and after igniting a pilot burner (not shown) of the burner 43, the electric pumps 15 and 25 are energized and operated, and the solenoid valve 56 is energized and opened.

Therefore, the water in the water tank 13 is transferred to the electric pump 1
5. It is guided to the nozzle part 31 of the first mixer 19 via the check valve 17.

Further, liquid fuel such as petroleum in the liquid fuel tank 23 is guided to the nozzle portion 31 of the first mixer 19 via an electric pump 25, a flow meter 27, and a check valve 29.
Each of the introduced water and liquid fuel is connected to a pressure gauge 48,
49, a predetermined value is maintained by pressure regulating valves 51, 52, etc. These water and liquid fuel are transferred to pipes 18, 3
0 and through each passage of the nozzle 31, both liquids are mixed at a constant ratio depending on the pressure.

This mixed liquid is guided to the conduit 31a via the first mixing section 32, the second mixing section, etc. In this guided state, water and liquid fuel are mixed in each mixing section 3.
2 etc. to mix thoroughly.

This mixed liquid is led to the single mixing tank 34 via the electromagnetic valve 56, and after blending the two and removing air bubbles, the mixed liquid is led again to the second mixer 38 via the electric pump 36, and then The mixture mixed in the mixer 19 of No. 1 is further mixed to make the mixing ratio uniform, and then supplied to the burner 43.

However, at this time, in the second mixer 38, the pressure discharged through the mixing parts 39, 40, etc. is not uniform, so the pressure is detected by the pressure gauge 47, and if it is higher than a predetermined value, The bypass valve 46 is controlled to be open and closed when the pressure is low, thereby maintaining the pressure supplied to the burner 43 at a predetermined value.

Therefore, in the burner 43, a liquid fuel such as a fuel mixed with oil and water is burned at a predetermined pressure, and the mixed fuel of oil and water is burnt well, and water etc. in the boiler 42 can be efficiently burned with a small amount of oil. Can be heated. Therefore, in the boiler 42, compared to combustion using only oil, fuel savings can be achieved by the amount of mixed water.

The mixed liquid that is not burned in the burner 43 is returned to the mixing tank 34 via the pipe line 44, and is sent to the electric pump 36 together with the mixed liquid led from the first mixer 19.
The mixed liquid is supplied to the burner 43 via the second mixer 38 and used for re-combustion, so that the mixed liquid can be sufficiently combusted.

To stop this combustion device, first the solenoid valve 56
is deenergized to close the pipeline, and then the electric pump 1
5 and 25, the on-off valves 11 and 21, and the electric pump 36.

As described above, according to the liquid fuel combustion device of the present invention,
Since the liquid fuel and water are mixed in advance in the first mixer and then remixed in the second mixer via the mixing tank, the liquid fuel and water can be mixed uniformly and sufficiently. Since this is supplied to a combustor such as a burner at a predetermined pressure, combustion is good and fuel costs are greatly reduced.

Although this mixing ratio depends on the usage conditions of the boiler, it can be up to a maximum ratio of 1:1, which allows efficient use of fuel and has the advantage of promoting fuel saving.

Further, in the present invention, the oversupplied mixed liquid fuel that is not burned in the combustor through the return pipe 44 is returned directly from the combustor to the mixing tank in a circuit separate from the supply line, so that the combustion port It is possible to achieve complete combustion without causing an excessive supply of mixed liquid fuel to the engine or a decrease in combustion efficiency. In addition, a return pipe that circulates from the combustor solves the problem of synchronization between the combustion amount and the supply amount, which cannot be completely followed due to the response delay in pressure adjustment to the combustor supply line, and improves combustion and supply. improves the balance and enables efficient combustion.

That is, the present invention aims to control the fuel supply and combustion cycle in a healthy manner by adjusting the pressure of the supply lie in the bypass circuit 45 and correcting errors in the pressure adjustment in the return pipe 44.

Further, in the present invention, the mixed liquid fuel returned from the return pipe 44 and the bypass circuit 45 is not returned to the intermediate supply line, but is returned to the mixing tank 34 disposed on the inlet side of the second mixer. This enables stable fuel supply at all times without changing the flow rate of the fuel.

Furthermore, in the present invention, the mixing ratio of water and liquid fuel can be adjusted with a relatively simple structure by means of the normal twist fins and the reverse twist fins arranged alternately in each of the first mixer and the second mixer. , emulsion can be promoted and high quality mixed liquid fuel can be produced. Further, in the first mixer, by jetting water and liquid fuel to the twisted fins through nozzles, the emulsion effect can be enhanced by their synergistic effect.

[Brief explanation of the drawing]

FIG. 1 is a mixing circuit diagram of the liquid fuel mixing device of the present invention, and FIGS. 2 and 3 are cutaway sectional views of first and second mixers used in the mixing circuit of FIG. 1. 13 is a water tank, 15 is an electric pump, 17 is a check valve, 19 is a first mixer, 23 is a liquid fuel tank, 25 is an electric pump, 29 is a check valve, 32 is a solenoid valve, 34 is a mixing tank , 36 is an electric pump, 3
8 is a second mixer, 42 is a boiler, 43 is a burner, 45 is a bypass circuit, and 46 is a bypass valve.

Claims (1)

[Claims] 1. A liquid fuel tank, a water tank, a first mixer that mixes the water and liquid fuel supplied from the water tank and the liquid fuel tank at predetermined pressures, respectively, and an on-off valve for the first mixer. a mixing tank that stores the mixed liquid fuel formed in the first mixer and removes bubbles; a second mixer that receives the mixed liquid fuel from the mixing tank and performs remixing; A liquid fuel combustion device comprising a combustor that receives mixed liquid fuel from a combustor,
The combustor and the mixing tank are connected by a return pipe that returns excess fuel that is not burned in the combustor to the mixing tank, and the supply pipe from the second mixer to the combustor is connected to the return pipe. A bypass circuit is used to adjust the pressure of the mixed liquid fuel supplied to the combustor through the supply pipe by controlling the bypass valve, and through this connection, the fuel in the bypass circuit is transferred to the unburned fuel in the return pipe. The first mixer and the second mixer are further provided with a mixing section in which normal twist fins and reverse twist fins are arranged alternately in a cylinder, A liquid fuel combustion device characterized in that the first mixer is equipped with a nozzle that injects water and liquid fuel into the mixing section, respectively.