JPS5816113A - Burner - Google Patents

Abstract

PURPOSE:To atomize and ignite liquid fuel in a short time, by constituting a burner in such a manner that the liquid fuel contained in an impregnating body is atomized and burnt by the air for combustion when the heated air for combustion passes through the impregnating body. CONSTITUTION:An impregnating body 7 is to impregnate kerosene with it, which is made of heat-resistant, inorganic material. The kerosene fed from a liquid fuel feed pipe 4 is penetrated into the impregnating body 7. The air heated by a heater is fed from the direction shown by an arrow sign, passing through the impregnating body 7 and a burner port plate 12, being fed into a combustion chamber 11. During this time, the kerosene contained in the impregnating body 7 is atomized by the heated air for combustion, mixed with the secondary air for combustion at the same time when it comes out of the burner port plate 12, ignited by an electrode 9, and is burnt in the combustion chamber 11. With such a constitution, tar content is not produced in a burner if oxidized and deteriorated liquid fuel or that in which impurities of high boiling ponts are mixed is burnt, as well as to enable to atomize and ignite liquid fuel in a short time.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combustion device that uses liquid fuel such as kerosene as fuel.

In general, conventional combustion devices for home heaters heat a metal or other hot plate with a heating device such as an electric heater, then drop kerosene onto the sufficiently heated area, or spray kerosene particles using a rotary atomizer, etc. In many cases, the kerosene is vaporized by contact with the hot plate, and the vaporized kerosene and air are mixed and ignited at the flame opening, causing combustion.

However, since the hot plate has a large heat capacity, it has the disadvantage that it takes about 6 minutes to heat the hot plate with a heating device to reach about 250°C, the temperature at which kerosene vaporizes.

FIG. 1 is a perspective view of a conventional FF oil hot air heater, and FIG. 2 is a front sectional view thereof.

An oil tank 2 for storing kerosene is provided at the bottom of the main body 1 of the FF type oil warm air fan. ．． Heat exchange header 20. It is discharged outdoors through the heat exchange pipe 21.

Meanwhile heated heat exchanger8. Heat exchange Henda 2Q.

The air that has undergone heat exchange with the heat exchange pipe 21 is transferred to the heating fan 1.
It is sent into the room by o and heats the room.

FIG. 3 is an enlarged sectional view of the combustion section (partially the combustion chamber 11) of FIG. 2. Kerosene supplied from the fuel tank 2 through the fuel supply pipe 4 is dripped onto the rotating rotor 31. The dropped kerosene is diffused onto the inner wall of the vaporizing chamber 32 by the centrifugal force of the rotor 31. A heater 6 for heating the vaporization chamber 32 is installed inside the vaporization chamber 32, and the inner wall of the vaporization chamber 1o is sufficiently heated by the heater 6. Then, the combustion air taken in from the air supply port 24 is sent to the vaporization chamber 32 by the blower 5, and the kerosene vaporized in the vaporization chamber 32 and the combustion air are mixed by rotation by the stirring plate 33.
It is supplied to the combustion chamber 11 from the porous flame port plate 12 . This air-fuel mixture is mixed with the secondary combustion air sent by the blower 6 at the flame port plate 12, ignited at the electrode 9, and moved into the combustion chamber.
Burns within 1.

By burning kerosene, the vaporization chamber 32 and the combustion chamber 11
Since the protrusions inside are heated and the vaporization of kerosene is promoted, the heater 6 does not need to be energized. A frame rod 34 provided in the burnt combustion chamber 11 serves to detect whether kerosene is being burned.

In the combustion apparatus configured as described above, it takes about 6 minutes to sufficiently heat the vaporization chamber 32 with the heater 6 to reach a temperature of about 250° C. or higher to vaporize kerosene in the initial stage. Therefore, for those who actually use it, it is very inconvenient because it does not heat up immediately on cold mornings. This problem arises because the heat capacity of the vaporization chamber 32 is large.

The present invention solves the drawbacks of such conventional combustion devices, 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 and an impregnated body provided downstream of the air heating device and impregnated with liquid fuel, and when the combustion air heated by the air heating device passes through the impregnated body, The liquid fuel contained in the impregnated body is vaporized by combustion air, and the vaporized liquid fuel is combusted in the combustion chamber provided downstream of the impregnated body, so that the liquid fuel can be vaporized and ignited in a short time. To provide a convenient and easy-to-use combustion device which does not generate tar even when it burns oxidized and altered liquid fuel or liquid fuel mixed with high boiling point impurities.

An embodiment of the present invention will be described below with reference to FIGS. 4 to 11.

Note that components that are the same as those of the conventional combustion device will be described with the same reference numerals.

Figure 4 is a front cross-sectional view of the oil hot air heater. At the bottom of the main body 1 of this oil hot air heater, there is an oil tank 2 for storing kerosene, which is an example of liquid fuel, and this oil tank. Oil pump that supplies kerosene in 2.3. A fuel supply pipe 4 is provided.

The combustion air sent by the blower 5 is heated by a heater 6 provided as an example of an air heating device, and the impregnated body 7
supplied to Kerosene is supplied to the impregnated body 7 from the fuel supply pipe 4, 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.

Combustion gas generated in the combustion chamber is supplied into the room by a heating fan 1o, and the room is heated.

FIG. 5 shows a sectional view of the impregnated body 7 provided in the combustion section. This impregnated body 7 can be impregnated with kerosene, is made of a heat-resistant inorganic material, and has a specific gravity.

A porous flame port plate 1 made of fibers mainly composed of alumina and silica with a small heat capacity and provided on the combustion chamber 11 side.
2 together with 7 lunges 13 and impregnated body presser 14,
It is fixed via a packing 16, and a fuel supply pipe 4 is attached to the upper part of the impregnated body 7. The kerosene supplied from this fuel supply pipe 4 permeates into the impregnated body 7. Then, air heated by the heater 6, which is an air heating device shown in FIG. 6, is supplied from the right side (arrow) of FIG.
It passes through the impregnated body 7, passes through the flame port plate 12, and enters the combustion chamber 11. At this time, the kerosene contained in the impregnated body 7 is vaporized by the heated combustion air, comes out from the flame port plate 12, mixes with the secondary combustion air, and is ignited by the electrode 9, and is ignited in the combustion chamber. It burns in 11.

FIG. 6 is an enlarged sectional view of the heater 6 used as the air heating device in FIG. 4. This heater 6 is composed of a heater element 16 whose main component is barium titanate, and has numerous ventilation holes inside through which combustion air passes, as shown in FIG.
A thin electrode coating is provided on the front and back surfaces, and is fixed with an electrode cover 17. This electrode cover 17 is provided with a lead wire 18 for energizing the heater element 16, which heats the combustion air sent from the blower device 6. This heater element 16 has a property that its electrical resistance is small at low temperatures and becomes large at high temperatures. Therefore, when electricity is applied to this heater 6, the electrical resistance is small in the initial stage, so a large current flows, and the temperature of the heater 6 rises very quickly. becomes larger. Therefore, when comparing the time required for the temperature rise of the heater 6 to reach its peak with a conventional heater, in the heater 6 of this embodiment, a large current flows at the beginning, so it rises quickly to a high temperature, and furthermore, when the temperature reaches a high temperature, the electrical resistance decreases. The large size makes it difficult for current to flow, and since it has self-temperature control, there is no need to provide a temperature detection means for temperature control, making a major contribution to the creation of inexpensive and economical combustion equipment. ○ Figure 8 FIG. 2 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 pigeon feeding device 5 and sent to the heater 6 via the air supply/exhaust heat exchanger 19.

The combustion air taken in from this blower 6 section is indirectly heated (no mixing occurs) with the combustion gas from the heat exchanger 8 which is discharged outdoors via the air supply/exhaust heat exchanger 19, and is further heated by the heater 6. When the impregnated body 7 passes through the impregnated body 7, the kerosene contained in the impregnated body 7 is vaporized and burned in the combustion chamber 11. The combustion gas is then transferred to a heat exchanger 8. Heat exchange header 20. Heat exchange pipe 21. It is discharged to the outside of the main body 1 through the air supply/exhaust heat exchanger 19. If the heater 6 is a heater element 16 whose main component is barium titanate as shown in FIG. As the value increases, the value of the current flowing to the heater 6 decreases, leading to savings in power consumption and energy conservation. Further, by lowering the temperature of the combustion gas discharged from the air supply/exhaust heat exchanger 19 (increasing the heat exchange rate), the combustion efficiency of the combustion device is also increased, contributing to energy saving.

The combustion device shown in FIG. 9 heats the combustion air by passing a heat exchange 1° pipe 21 through the blast pipe 22 that supplies combustion air from the blower 6 to the heater 6. , the same effect as above can be obtained.

The combustion apparatus shown in FIG.
As shown in the figure, an air supply pipe 25 having an intake hole 24 is provided on the outside of the exhaust pipe 23, and the same effect as the FF oil hot air heater shown in Figs. 8 and 9 can be obtained. .

Note that the impregnated body 7 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 therethrough.

However, metals such as nickel and iron or metal compounds having a catalytic action are not preferable because they generate tar components. In this respect, alumina and silica are advantageous because they act as carriers for catalysts 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 2 may be a leveler tank or a cartridge tank. Further, although the kerosene supply to the impregnated body 7 has been explained using a fuel supply pipe as an example, it may be directly supplied to the center part without dripping from the upper part, as shown in FIG.

When burning kerosene in the combustion device configured as described above, the kerosene stored in the oil tank 2 is soaked into the impregnated body 7 made of fibers mainly composed of alumina and silica using the oil pump 3 and heated to an appropriate size. At the same time, when electricity is applied to the heater 6, which has barium titanate as a main component and has self-temperature control properties, the heater 6 rapidly reaches a high temperature and the current stops flowing.

Then, the combustion air is sent to the heater 6 by the blower 6, heated by the heater 6 to a temperature of about 250° C. or more at which the kerosene is vaporized, and the impregnated body 7. It passes through a porous flame port plate 12. When heated combustion air passes through this impregnated body 7, the impregnated body 7
It is composed of fibers whose main components are alumina and silica, so it has a high bulk specific gravity.

It has a small heat capacity and easily vaporizes the kerosene contained in the impregnated body 7 without lowering the temperature of the combustion air, and is ignited and combusted by the electrode 9, which is an ignition device. In the oil hot air heater shown in FIG. 4, the air and combustion gas heated in the combustion chamber are sent into the room by the heating fan 10 to heat the room.

In the case of the F'F type oil hot air heater shown in Figures 8 and 9, the heat exchanger 8. Heat exchange header 20° heat exchange pipe 21. The air is discharged outdoors through the air supply/exhaust heat exchanger 19, which is connected to the exhaust pipe 2 as shown in FIG.
When the air supply pipe 25 for supplying combustion air is provided outside the heater element 3, the combustion air is heated by the combustion gas, so when the combustion air flows into the heater 6, which is an air heating device, the electrical resistance of the heater element 16 increases. increases, the current value flowing through the heater 6 decreases, and power consumption is saved.

This air supply/exhaust heat exchanger 19 may be provided with the exhaust pipe 23 on the outside and the air supply pipe 25 on the inside, or as shown in FIG. A similar effect can be expected even if it penetrates.

As is clear from the above explanation, the combustion device of the present invention is
Combustion air for burning liquid fuel is supplied to an air heating device using a blower and heated, and the heated combustion air is passed through the impregnated body to vaporize the liquid fuel contained in the impregnated body. By combusting the liquid in the combustion chamber, the liquid combustion contained in the impregnated body is vaporized by the combustion air heated by the air heating device, so the temperature of the vaporization chamber cannot be raised to about 250°C or higher, unlike conventional methods. The time in the combustion section is much shorter than the time required to heat and vaporize liquid fuel.

Moreover, when the supply of liquid fuel to the impregnated body is stopped, the liquid fuel contained in the impregnated body will burn for a while, and the impregnated body will be in a dry state. Even with liquid fuel mixed with impurities, less tar is generated, and therefore the life of the combustion device can be extended, and a convenient combustion device that is easy to use can be provided.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an FF type oil hot air heater showing a conventional example of the combustion device of the present invention, Fig. 2 is a front sectional view of Fig. 1, and Fig. 3
The figure is an enlarged cross-sectional view showing the combustion part in Figure 2, Figure 4 is a front cross-sectional view of an oil hot air heater used as a combustion device showing an embodiment of the present invention, and Figure 6 is an enlarged sectional view showing the combustion part in Figure 4. 6 is an enlarged sectional view showing the air heating device shown in FIG. 4, FIG. 7 is a front view of the heater element used as the air heating device shown in FIG. 6, and FIGS. The figure is a sectional view of an FF'F type oil hot air heater used as a combustion device showing another embodiment of the present invention.
FIG. 1o is a sectional view of a main part showing still another embodiment of the present invention. 6... Air blower, 6... Heater (air heating device), 7... Impregnated body, 8... Heat exchanger, 11... Combustion chamber, 12...flame port plate, 19...supply/exhaust heat exchanger (heat exchanger), 2
2...Blow pipe, 23...Exhaust pipe, 26
...Air supply pipe. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 4
Figure 1 Figure 5 Figure 6 B f'7 fG 72- Figure 7 Figure 9 Figure 10 Figure 11

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 this blower device, and a downstream of this air heating device. an impregnated body that is located at the impregnated body, contains liquid fuel, and through which the combustion air heated by the air heating device can pass; and a combustion chamber that is provided downstream of the impregnated body. Combustion device. (2) The combustion according to claim 1, wherein the impregnated body is composed of fibers mainly composed of alumina and silica, and has a porous flame port plate on the downstream side of the impregnated body. Device. (3) The combustion device according to claim 1, wherein the air heating device contains barium titanate as a main component and has a self-temperature control property. (4) A heat exchanger is provided downstream of the combustion chamber, and part or all of this heat exchanger penetrates through a blow pipe between the blower and the air heating device. Combustion device according to scope 1. (6) Provide a heat exchanger downstream of the combustion chamber, further provide an exhaust pipe downstream of the heat exchanger for discharging combustion gas outdoors, provide an air supply pipe inside or outside of this exhaust pipe, and provide an air supply pipe inside or outside of this exhaust pipe. The combustion device according to claim 1, characterized in that the combustion air is guided from the air to the blower device.