JPS5816112A - Burner - Google Patents

Abstract

PURPOSE:To shorten the time up to the start of combustion for liquid fuel, by letting heated air for combustion pass through the pores provided to an impregnating body and the ones provided to a burner port plate, and by atomizing to burn liquid fuel by the heated combustion air. CONSTITUTION:The kerosene fed from a fuel feed pipe 1 is penetrated into an impregnating body 2. The air heated by a heater is fed from the direction shown by an arrow sign, passing through the impregnating body 2 and a metallic burner port plate 13, being fed into a combustion chamber 12. During this time, the kerosene contained in the impregnating body 2 is atomized by the heated air for combustion, mixed with the secondary air for combustion at the same time when it comes out of a plurality of pores 17 of a burner port plate 13, ignited by an electrode 9 and is burnt in the combustion chamber 12. With such a constitution, the liquid fuel contained in an impregnating body is atomized in a short time by the air for combustion heated by an air heater, so that the time up to the start of combustion of liquid fuel can largely be shortened, the thermal efficiency is increased, as a result, the burner of this type can contribute to eliminate energy consumption.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustor that burns liquid fuel such as petroleum.

In general, conventional combustion machines for household heaters heat a metal or other hot plate with a heating device such as an electric heater, and then drop kerosene onto the sufficiently heated area, or use rotary spraying to spread kerosene particles to the heated area. In many cases, kerosene vaporizes when it comes into contact with a plate, and the vaporized kerosene and air are mixed and ignited at the flame opening, causing combustion.

However, the heat plate has a large heat capacity, so it takes about 5 minutes to heat the heat plate with a heating device and reach the temperature of about 260°C, at which kerosene vaporizes, which means that it is cold for those who actually use it. It was very inconvenient because the heating was not turned on right away, especially in the morning.

The present invention solves these drawbacks of conventional combustion machines, and includes a blower device that supplies combustion air for burning liquid fuel, and an air heater that heats the combustion air supplied by the blower device. a device, an impregnated body located downstream of the air heating device and provided with a plurality of holes, a burner port plate located downstream of the impregnated body and provided with a plurality of holes, and a liquid fuel supplied to the impregnated body. By comprising a fuel supply device and a combustion chamber provided downstream of the flame port plate, the combustion air for burning liquid fuel is heated in a short time by the air heating device,
Moreover, since multiple holes are provided in the impregnated body and the burner port plate so that the heated combustion air can easily pass through, the contact area between the liquid fuel contained in the impregnated body and the combustion air is also increased.
To provide a combustor that can efficiently vaporize liquid fuel using heated combustion air and perform good combustion.

Embodiments of the present invention will be described below with reference to FIGS. 1 to 8.

FIG. 1 schematically shows the configuration of the combustion machine of the present invention, in which kerosene, which is used as an example of liquid fuel, is supplied to the impregnated body 2 through a fuel supply pipe 1, and combustion air for burning the kerosene is sent to the device. Heater 4 provided as an example of an air heating device in 3.
supply to The combustion air heated by the heater 4 is passed through the impregnated body 2, and the kerosene contained in the impregnated body 2 is vaporized and burned.

FIG. 2 is a front sectional view of an oil hot air heater used as an example of a combustor. At the bottom of the main body 5 of this oil hot air heater, there is an oil tank 6 for storing kerosene, and a fuel supply device 7 for supplying the kerosene in the oil tank 6. A fuel supply pipe 1 is provided. Combustion air sent by the blower 3 is heated by the heater 4 and supplied to the impregnated body 2 having a plurality of holes. Kerosene is supplied to this impregnated body 2 from a fuel supply pipe 1, where the kerosene is vaporized and mixed, and the kerosene is combusted using a heat exchanger 8 provided in the combustion section as a combustion chamber. The electrode 9 is provided to ignite the vaporized kerosene. The combustion gas generated in the combustion chamber is heated by a heating fan 1o.
is supplied to the room and heats the room.

FIG. 3 shows a sectional view of the impregnated body 2 provided in the combustion section. This impregnated body 2 is impregnated with kerosene,
It is made of a heat-resistant inorganic material, and is made of fibers mainly composed of alumina and silica, which have small bulk specific gravity and heat capacity, and has a plurality of holes 11, together with a metal flame port plate 13 provided on the combustion chamber 12 side. , Patsukin 16 by the pot holder 4 and the impregnated body presser 15
The fuel supply pipe 1 is attached to the upper part of the impregnated body 2. In addition, this metal flame plate 1
3 is also provided with a plurality of holes 17. The kerosene supplied from the fuel supply pipe 1 permeates into the impregnated body 2. Then, air heated by the heater 4, which is an air heating device shown in FIG. 4, is supplied from the right side (arrow) in FIG. . At this time, the kerosene contained in the impregnated body 2 is vaporized by the heated combustion air and comes out from the plurality of holes 17 of the burner port plate 13. At the same time, the kerosene contained in the impregnated body 2 is mixed with the secondary combustion air, and the soil is deposited on the electrode 9. It is ignited and the inside of the combustion chamber 12 is burned. .

FIG. 4 is an enlarged sectional view of the heater 4 used as the air heating device in FIG. This heater 4 is composed of a heater element 18 whose main component is barium titanate, has numerous ventilation holes inside through which combustion air passes, and has a thin electrode coating on the front and back surfaces. It is fixed with a cover 19. This electrode cover 19 is provided with a lead wire 2o for energizing the heater element 18, which heats the combustion air sent from the blower device 3. This heater element 18 has a property that its electrical resistance is small at low temperatures, and its electrical resistance increases at high temperatures.

Therefore, when electricity is applied to this heater 4, a large current flows because the electrical resistance is small in the initial stage, and the temperature of the heater 4 rises very quickly. growing. Therefore, when comparing the time at which the temperature rise of the heater 4 reaches its peak with a conventional heater, in the heater 4 of this embodiment, a large current flows at the beginning, so it rises quickly when the temperature reaches a high temperature. Because the resistance is large, the current flows, and because it has self-temperature control, there is no need to provide temperature detection means other than temperature control, making a great contribution to the creation of inexpensive and economical power combustion machines.

FIG. 6 is a front sectional view of an FF type oil hot air heater showing another embodiment of the present invention. Combustion air is taken in from the blower 3 and sent to the heater 4 via the air supply/exhaust heat exchanger 21.

The combustion air taken in from the three parts of the blower is heated indirectly (no mixing occurs) with the combustion gas from the heat exchanger 8 which is discharged outdoors via the air supply/exhaust heat exchanger 21, and is further heated by the heater 4. The impregnated body 2 is heated to a temperature of about 260° C. or higher to vaporize the kerosene, and when it passes through the impregnated body 2, the kerosene contained in the impregnated body 2 is vaporized and burned in the combustion chamber. The combustion gas is then transferred to a heat exchanger 8. Ladder to heat exchange 22. Heat exchange pipe 23. It is discharged to the outside of the main body 5 via the air supply/exhaust heat exchanger 21.

If a heater element 18 whose main component is barium titanate as shown in FIG. The resistance value increases, the current value flowing to the heater 4 decreases, and power consumption is saved, leading to energy saving. In addition, by lowering the temperature of the combustion gas discharged from the air supply/exhaust heat exchanger 21 (increasing the heat exchange rate), the combustion efficiency of the combustor increases, contributing to energy saving.

The combustor shown in FIG. 6 heats the combustion air by passing a heat exchange pipe 23 through the air pipe 24 that supplies combustion air from the air blower 3 to the heater 4. You can get the same effect as .

The combustor shown in FIG. 7 has an air supply/exhaust heat exchanger 21 provided with an air supply pipe 27 having an intake hole 26 on the outside of an exhaust pipe 25, as shown in FIG. FF in Figure 6
The same effect as an oil hot air heater can be obtained.

The impregnated body 2 may be any material as long as it is made of a material that can withstand high temperatures, is impregnated with kerosene, and allows air to pass through easily. However, metals such as nickel and iron or metal compounds having a catalytic action are preferable because they generate tar components. In this respect, alumina and silica are convenient because they act like catalyst supports and have little catalytic activity.

Furthermore, although this embodiment has been described using an oil hot air heater or an FF type oil hot air heater, it may also be used in a combustion part of a hot water boiler, various types of heaters, water heaters, and the like. Further, the oil tank 6 may be a leveler tank or a cartridge tank. The supply of kerosene to the shriveled impregnated body 2 has been explained using the fuel supply pipe 1 as an example, but it may be directly supplied to the center part instead of dripping from the top, as shown in FIG.

When burning kerosene in the combustion machine configured in this way, the kerosene stored in the oil tank 6 is fed to the fuel supply device 7, which is made of fibers mainly composed of alumina and silica.
Moreover, when the impregnated body 2 with a plurality of holes 11 is soaked and electricity is applied to the heater 4 which has self-temperature control properties and is composed mainly of barium titanate, the heater 4 rapidly reaches a high temperature and current flows. It becomes difficult. Then, the combustion air is sent to the heater 4 by the blower 3, heated to a temperature of about 250"C or higher to vaporize the kerosene, and the impregnated body 2
and the hole 17 of the flame outlet plate 13. When the heated combustion air passes through the impregnated body 2, the bulk specific gravity decreases because the impregnated body 2 is composed of fibers whose main components are alumina and silica.

It has a small heat capacity and does not lower the temperature of the combustion air.
The kerosene contained in the impregnated body 2 is easily vaporized and ignited by an electrode 9 serving as an ignition device to burn it. In the oil hot air heater shown in FIG. 2, the air and combustion gas heated in the combustion chamber are sent into the room by the heating fan 1o to heat the room.

Also, if you have the FFFF oil hot air heater shown in Figs. 5 and 6, the heat exchanger 8. Heat exchange header 22. Heat exchange pipe 23
．． The air is discharged outdoors through the air supply/exhaust heat exchanger 21, but if the air supply/exhaust heat exchanger 21 is provided with an air supply pipe 27 for supplying combustion air outside the exhaust pipe 25 as shown in FIG. Since the combustion air is heated, when the combustion air flows into the heater 4, which is an air heating device, the electrical resistance of the heater element 18 increases and the current value flowing through the heater 4 decreases, saving power consumption. Ru.

This air supply/exhaust heat exchanger 21 may be provided with the exhaust pipe 25 on the outside and the air supply pipe 27 on the inside, or as shown in FIG. A similar effect can be expected even if it penetrates.

However, by providing a plurality of holes 11° 17 in the impregnated body 2 and the flame port plate 13, the ventilation resistance of the combustion air heated by the air heating device 4 is reduced, and moreover, the airflow resistance of the combustion air heated by the air heating device 4 is reduced. Since the contact area between the heated kerosene and the combustion air is also increased, the kerosene can be vaporized smoothly and good combustion can be achieved.

Furthermore, since the flame outlet plate 13 having a plurality of holes 1 is located downstream of the impregnated body 2 and is provided in close contact with the impregnated body 2, when the supply of kerosene to the impregnated body 2 is stopped, the impregnated body 2 Since the kerosene contained in
is in a dry state.

Therefore, a combustion machine with less tar generation and a long life of the combustion section can be obtained.

As is clear from the above description, the combustion machine of the present invention supplies combustion air for burning liquid fuel to an air heating device using a blower device to heat it, and then uses the heated combustion air to
By passing the liquid fuel contained in the impregnated body through a hole provided in the impregnated body and a hole provided in the flame port plate, the liquid fuel contained in the impregnated body is vaporized and burned in the combustion chamber. Since the fuel is vaporized by combustion air that is heated in a short time by an air heating device, the temperature in the vaporization chamber is kept at about 250℃ as in the conventional method.
Compared to the time it takes to vaporize liquid fuel by heating it to temperatures above 100 mph, the time required for combustion is much shorter, and the thermal efficiency is high, contributing to energy savings.

In addition, by providing multiple holes in the impregnated body and the burner port plate, the contact area between the liquid fuel contained in the impregnated body and the combustion air passing through the impregnated body is increased, and the vaporization of the liquid fuel becomes smooth. Moreover, since the mixing ratio of the vaporizing lamp and the combustion air is maintained appropriately, good combustion can be obtained.

Furthermore, even if liquid fuel that has been oxidized and degraded or liquid fuel that has high boiling point impurities mixed in is used, when the supply of liquid fuel to the impregnated body is stopped, the liquid fuel contained in the impregnated body will not reach the flame port plate. Since it burns for a while, the impregnated body is in a dry state.

Therefore, less tar is produced, the life of the combustion section is extended, and the combustion machine can be provided as an easy-to-use and convenient combustion machine.

Fig. 3 is an enlarged sectional view showing the impregnated body shown in Fig. 2, Fig. 4 is an enlarged sectional view showing the air heating device shown in Fig. 2, and Figs. 5 and 6 are a front sectional view of the wind heater. Another embodiment of the combustor of the present invention is a χ, Iji, type oil hot air heater, which is a cross-sectional view of the main parts of the air supply/exhaust heat exchanger shown in FIG. 7.

2... Impregnated body, 3... Air blower, 4.
... Heater (air heating device), 7 ... Fuel supply device, 11 ... Hole, 12 ... Combustion chamber, 13 ... Flame Mouth plate, 17... hole.

Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure @ Figure 2) 1 1 ＼ 8 476 Figure 5 9'? Figure 7 Figure 8 26 66-

Claims (1)

[Claims] (1) A blower device that supplies combustion air for burning liquid fuel, an air heating device that heats the combustion air supplied by the blower device, and this air heating device. an impregnated body located downstream of the impregnated body into which the liquid fuel permeates; a metal burner port plate located downstream of the impregnated body and provided in close contact with the impregnated body; and a combustion chamber provided downstream of the burner port plate, through which combustion air heated by the air heating device can pass through the impregnated body and the metal burner port plate. A combustion machine characterized by having multiple holes. (2) The combustor according to claim 1, wherein the air heating device contains barium titanate as a main component and has a self-temperature control property. (3) A heat exchanger is provided downstream of the heating chamber, and part or all of this heat exchanger is configured to penetrate through a blower pipe provided between the blower and the air heating device. A combustion machine according to claim 1. (4) A heat exchanger is provided downstream of the heating chamber, an exhaust pipe for discharging combustion gas outdoors is provided in the heat exchanger, an air supply pipe is provided in contact with the inside or outside of this exhaust pipe, and this A combustion machine according to claim 1, characterized in that the combustion air is guided from a trachea to a blower device. (6) The combustor according to claim 1, wherein the impregnated body is composed of fibers whose main components are silica and alumina.