JPH0875115A - Combustion apparatus - Google Patents

Abstract

PURPOSE: To ensure good combustion by preventing clogging from being produced owing to tar production on a vaporization element, and preventing a poor vaporization. CONSTITUTION: A vaporization chamber 16 is disposed in a vaporization part 11 extending in the direction of an outer periphery thereof for vaporizing a fuel, and a columnar inorganic porous structure vaporization element 17 is disposed on a nozzle side of the vaporization chamber 16, and further a hollow pipe-shaped inorganic porous structure vaporization element 18 is disposed on an oiling side. A filter part is constructed with a vaporization gas passage part in the vaporization element and an outlet of the nozzle part side. Hereby, fuel entering the vaporization chamber 16 is sucked and diffused into the inorganic porous structure vaporization element and is vaporized over a wide region of the vaporization element to prevent tar of the vaporization element from being produced. Since the vaporized gas passes through a hollow part in the vaporization element and is ejected from a nozzle through the filter part, the gas vaporized in the wide region is collected through the hollow part and is filtrated through part of the filter part whereby bad vaporization is prevented for good combustion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus for vaporizing a liquid fuel and ejecting the vaporized gas from a nozzle for combustion.

[0002]

2. Description of the Related Art Conventionally, various types of combustion devices of this type have been proposed, some of which burn a liquid fuel gas obtained by vaporizing gas or kerosene. The combustion apparatus for burning the liquid fuel gas will be described below as an example. Such a combustion apparatus is configured as shown in FIG.

That is, first, the fuel is supplied from the cartridge tank 30 to the tank 29, and the fuel in the tank 29 is supplied to the vaporization chamber in the vaporization section 32 kept at a high temperature by the pump 31. Then, the supplied fuel is vaporized by a vaporization element provided in the vaporization chamber, becomes vaporized gas, has a high pressure in the vaporization chamber, and is ejected horizontally from the nozzle 33. The fuel ejected from the nozzle 33 is ejected into the mixing pipe 34 provided separately on the downstream side of the vaporizing section 32 while sucking the primary air by the ejector effect, and is mixed there, and is integrated with the mixing pipe 34 in a line. It is supplied to the burner section 35 having a shape and burned there. The generated combustion gas is guided upward by a combustion cylinder 36 arranged so as to cover the periphery of the burner portion 35, mixed with the indoor air flow from the blower 38 by a duct 37 covering the combustion cylinder 36, and heated. It is discharged as wind and used for heating. When the fuel supply amount is adjusted by changing the driving frequency of the pump 31 and the applied voltage, this combustion device changes the primary air amount accordingly, and changes the combustion amount while keeping the fuel-air ratio constant. You can do it.

[0004]

However, the combustion device having such a structure is used as a vaporization element that vaporizes the fuel when a deteriorated oil that has been stored for a long period of time and oxidized, or a different oil mixed with different components is used as the fuel. There has been a problem that tar is generated and causes vaporization failure or clogging of the vaporization element.

[0005] For example, if the vaporization failure progresses, the vaporization chamber pressure does not rise too high and the jet of vaporized gas from the nozzle weakens, the ejector effect due to the jetting weakens, and the suction amount of primary air decreases and the combustion state of the burner section decreases. It becomes worse and produces pulse burning, odor, soot, carbon monoxide, and eventually misfire.

When the vaporization element is further clogged, especially the clogging of the vaporization element near the fuel inlet of the vaporization chamber inhibits the fuel from entering the vaporization chamber, and the supply force from the pump is reduced. The amount of fuel that enters the vaporization chamber, that is, the amount of vaporization, decreases, and even if the pressure inside the vaporization chamber rises, the amount of combustion decreases, eventually becoming weak combustion and exceeding the combustion limit, producing odors and misfiring. .

[0007] The combustion device is designed to stop the operation of the equipment by detecting an abnormality with a combustion sensor or the like before odor or misfire, so that vaporization failure due to tar formation of the vaporization element or clogging of the vaporization element is prevented. There is a problem that the life of the device is affected.

The present invention has solved the above-mentioned problems and suppresses clogging of the vaporization element due to tar formation, and
The purpose is to prevent poor vaporization and enable good combustion.

[0009]

In order to achieve the above object, the present invention provides a fuel supply means for supplying a fuel, a vaporizing section for vaporizing the supplied fuel, a heater for heating the vaporizing section, and a vaporizing section. A nozzle for ejecting vaporized gas and a burner portion for burning the gas ejected from the nozzle are provided, and a vaporization chamber for vaporizing the fuel is provided in the vaporization unit so as to extend in the outer peripheral direction, and the nozzle side of the vaporization chamber is provided. A columnar inorganic porous body vaporizing element, and a hollow pipe-shaped inorganic porous body vaporizing element on the refueling side, and the vaporized gas passage in the vaporizing element and the nozzle side outlet The filter section is composed of.

In addition, the columnar inorganic porous vaporizing element has a hollow center with the nozzle side left, and the filter portion is integrally formed with the vaporizing element at the vaporized gas passage portion in the vaporizing element and the outlet on the nozzle side. There is.

In addition, a hollow pipe-shaped inorganic porous body vaporizing element is disposed in the vaporizing chamber, and a filter portion formed of wire mesh or the like is disposed on the nozzle side of the vaporizing element.

[0012]

According to the present invention, a vaporizing element for promoting vaporization is provided in the vaporizing chamber as described above, and a columnar inorganic porous body vaporizing element is provided on the nozzle side of the vaporizing chamber and a hollow pipe-like inorganic porous body is vaporized on the oil supply side. Since the element is arranged and the filter portion is constituted by the vaporized gas passage portion in the vaporization element and the outlet on the nozzle side, the fuel that has entered the vaporization chamber is sucked and diffused into the vaporization element of the inorganic porous body to be vaporized. Is diffused and vaporized in a wide range, and tar formation in the vaporization element is suppressed. Then, the vaporized vaporized gas is ejected from the nozzle through the hollow portion of the vaporization element and the filter portion, so that the vaporized gas vaporized in a wide area is collected through the hollow portion, and the vaporized gas is filtered by the filter portion. Poor vaporization is suppressed.

Further, in the columnar inorganic porous body vaporizing element, the center is hollow except for the nozzle side, and the vaporizing gas passage in the vaporizing element and the outlet on the nozzle side are integrally formed with the filter section. In the case of the product, since it is an integral structure, the structure is simplified, and there is no fear of tar generation occurring between the vaporized gas passage portion and the vaporization element of the filter portion.

In addition, in the vaporization chamber, a hollow pipe-shaped inorganic porous body vaporizing element is disposed, and a filter portion formed of wire mesh or the like is disposed on the nozzle side of the vaporizing element. Since the filter portion can be made thin, the vaporized gas passage portion of the vaporization element can be lengthened and a large amount of tar generation by the vaporization element can be removed, so that the vaporization element can be effectively used.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

First, the structure of a hot air heating apparatus using the combustion apparatus of the present invention will be described with reference to FIG. Reference numeral 1 denotes a main body case, on the lower side of which a tank 2 holding a liquid fuel and a detachable cartridge tank 3 are arranged above the tank 2. Reference numeral 4 denotes a pump mounted on the upper surface of the tank 2, and an oil feed pipe 5 is led out from the upper end of the pump to supply fuel to the combustion device 6.

Reference numeral 7 denotes a combustion cylinder for guiding the combustion gas from the combustion device 6 upward, and a blower 8 for taking in and delivering the indoor air flow is arranged at the back of the combustion cylinder. Reference numeral 9 is a duct for mixing the combustion gas from the combustion cylinder 7 and the indoor air flow to generate warm air. 1
Reference numeral 0 is a control unit for controlling the combustion of the combustion device 6 and the blower 8. The control unit 0 controls the pump 4, the blower 8 and the like in a predetermined sequence based on the operating condition signal input from the operation unit. .

Next, the structure of the combustion device 6 will be described with reference to FIG. 1. Reference numeral 11 is a vaporizing portion, and a circular burner receiving seat 12 is provided on the upper portion thereof so that it is located substantially at the center of the burner receiving seat 12. Nozzle 13 is arranged in the cylinder, an opening 14 for taking in primary air for supplying combustion air is provided between the burner receiving seat 12 and the nozzle 13, and a cylindrical shape is formed through a communication port 15 communicating with the nozzle. The vaporizing chamber 16 is formed integrally by extending in the outer peripheral direction.

In the vaporization chamber 16, a columnar inorganic porous filter vaporization element 17 is provided on the nozzle side of the vaporization chamber, and a hollow inorganic porous pipe-shaped vaporization element 18 is provided on the oil supply side. A vaporized gas passage in 16 and an outlet on the nozzle side constitute a filter section, and an oil supply port 19 for supplying fuel is arranged at the lower end on the opposite side of the nozzle 13. Further, a heater 20 is arranged along the lower surface side of the burner receiving seat 12 on the opposite side of the vaporizing chamber 16 of the vaporizing section 11.

Reference numeral 21 denotes a bottomless cylindrical mixing pipe placed on the burner receiving seat 12 so as to be located above the nozzle 13, and faces the nozzle 13, and the fuel gas ejected from the nozzle 13 and its fuel gas. It is designed to be mixed with the primary air sucked by the ejector effect due to the ejection of fuel gas.

Reference numeral 22 denotes a ceiling-shaped cylindrical burner portion which overlaps and covers the burner receiving seat 12 from the upper opening side so as to cover the mixing pipe 21, and has a large number of flame holes 23 formed in the lower peripheral wall.
Reference numeral 24 denotes an upwardly tapered burner ring attached to the burner receiving seat 12 so as to surround the outer periphery of the flame hole 23, and 25 denotes a heat receiving portion formed on the burner receiving seat 12.

In the above structure, the cartridge tank 3
The liquid fuel supplied to the tank 2 from the above so as to keep a constant oil level is sucked up from the tank 2 by the pump 4 and sent to the vaporization chamber 16 of the combustion device 6 via the oil supply pipe 5 and the oil supply port 19. The sent fuel is vaporized in the vaporization chamber 16 kept at a predetermined temperature or higher by the heater 20, becomes high-pressure fuel gas, and is ejected from the nozzle 13. At that time, the primary air is sucked by the ejector effect and the vaporization chamber 16 The mixture is mixed in the mixing pipe 21 provided on the downstream side, supplied into the burner portion 22, ejected from the flame holes 23, and burned. Then, the generated combustion gas flows above the combustion cylinder 7, is mixed with the indoor air flow from the blower 8 in the duct 9, is discharged as warm air, and is used for heating. Then, the control unit 10 controls the heater 20, the pump 4, the blower 8 and the like in a predetermined sequence based on the conditions set by the operation unit to start and stop the operation and change the combustion amount. Control the operation.

Here, the combustion in the burner section 22 will be described a little further. The fuel gas ejected from the nozzle 13 inside the mixing pipe 21 provided on the downstream side of the vaporization chamber 16 while sucking the primary air by the ejector effect. And is mixed here, and is mixed from the upper opening of the mixing tube 21 to the burner section 2
It is discharged into the inside of the mixing pipe 21 and flows back around the outer periphery of the mixing pipe 21, and is jetted from a large number of flame holes 23 provided in the peripheral wall below the burner portion 22 and burned.

At this time, the mixed gas returns to the burner portion 22 and flows around the mixing pipe 21, and in this portion diffusion mixing and uniformization of pressure are promoted, and the mixed gas is uniformly ejected from the flame holes 23 to form a uniform flame. Form. The flame forming direction is controlled so that the flame is directed upward by the burner ring 24 provided so as to be located on the outer circumference thereof, and stable combustion without lift is performed. Further, the heat receiving flange 25 is heated by the flame formed in the flame hole 23 of the burner portion 22, and the heat recovery action from this flame causes the vaporization chamber 1 to be heated.
As the temperature of 6 is kept above a certain temperature, the heater 20
It is possible to reduce a part or all of the power supply to the.

As described above, the vaporizing chamber 16 is provided with two vaporizing elements for promoting vaporization, a columnar inorganic porous filter vaporizing element 17 is provided on the nozzle side of the vaporizing chamber, and a hollow inorganic material is provided on the oil supply side. Since the porous pipe-shaped vaporization element 18 is disposed and the vaporized gas passage portion in the vaporization element and the outlet on the nozzle side constitute a filter portion, the fuel entering the vaporization chamber 16 is vaporized from the inorganic porous material. Vaporizing element 1 after being sucked and diffused by the element 17
7 is diffused and vaporized in a wide range, and tar generation of the vaporization element 17 is suppressed. Then, the vaporized vaporized gas is ejected from the nozzle 13 through the filter vaporization element 17 through the hollow portion of the vaporization element 17, so that the vaporized gas vaporized in a wide area is collected through the hollow portion, and is vaporized in the filter portion. Is filtered, and poor vaporization is suppressed.

FIG. 3 shows another embodiment, in which the same parts as those described in the previous embodiment are designated by the same reference numerals and the description thereof is omitted. When only different parts are described, 26 leaves the nozzle 13 side. Is a columnar inorganic porous body vaporization element in which the center is hollow and the filter portion B is integrally formed with the vaporization element at the vaporized gas passage portion 26A in the vaporization element and the outlet on the nozzle side.

In the above configuration, the vaporization element 26 has a simple configuration because the vaporized gas passage portion 26A and the filter portion 26B are integrally formed at the outlet on the nozzle portion 13 side,
Similar to the above-described embodiment, the fuel that has entered the vaporization chamber 16 is sucked and diffused into the vaporization element 26 of an inorganic porous body and diffused over a wide range of the vaporization element 26 to be vaporized, and the tar formation of the vaporization element 26 is suppressed. The vaporized vaporized gas passes through the vaporized gas passage portion 26A in the hollow portion of the vaporization element 26 and is ejected from the nozzle 13 through the filter portion 26B. Therefore, the vaporized gas vaporized in a wide range is collected through the vaporized gas passage portion 26A. Then, the vaporized gas is filtered by the filter portion 26B, and poor vaporization is suppressed. Further vaporized gas passage 2
There is no fear of tar generation between 6A and the vaporization element 26 of the filter portion 26B.

FIG. 4 shows another embodiment. The same parts as those described in the previous embodiment are designated by the same reference numerals and the description thereof is omitted. When only different parts are described, 27 is a vaporization chamber 16
A vaporization element of a hollow, pipe-shaped inorganic porous material arranged in
A filter portion 28 formed of wire mesh or the like is arranged on the nozzle 13 side of the vaporization element 27.

In the above-mentioned structure, as in the above-mentioned embodiment, the fuel that has entered the vaporization chamber 16 is the vaporization element 2 of the inorganic porous body.
7 is sucked and diffused into the vaporization element 27 and diffused in a wide range of the vaporization element 27 to be vaporized, and the tar generation of the vaporization element 27 is suppressed. Then, the vaporized vaporized gas is ejected from the nozzle 13 through the hollow portion of the vaporization element 27 and the filter portion 28, so that the vaporized gas vaporized in a wide range is collected through the hollow portion and is vaporized by the filter portion 28. Is filtered, and poor vaporization is suppressed. Further, since the filter portion 28 is formed of a wire mesh or the like and can be made thin, the vaporized gas passage portion of the vaporization element 28 can be made long, and a large amount of tar generation in the vaporization element 28 can be taken, so that it can be used effectively.

[0030]

As described above, in the combustion apparatus of the present invention, the vaporized gas passage portion in the vaporization chamber and the filter portion at the nozzle side outlet constitute the vaporization element made of the inorganic porous material. It is possible to prevent clogging due to tar formation, prevent vaporization failure, and perform good combustion.

Further, in the case where the vaporizing gas passage portion in the vaporizing element and the filter portion at the outlet on the nozzle side are formed integrally with the vaporizing element, the structure is simple because of the integral construction. There is no need to worry about tar formation between the vaporizing elements of the filter section.

In addition, in the vaporization chamber, a hollow pipe-shaped inorganic porous body vaporizing element is disposed, and a filter portion formed of wire mesh or the like is disposed on the nozzle side of the vaporizing element. Since the filter portion can be made thin, the vaporized gas passage portion of the vaporization element can be lengthened and a large amount of tar generation by the vaporization element can be removed, so that the vaporization element can be effectively used.

[Brief description of drawings]

FIG. 1 is a sectional view of a combustion apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view of a warm air heater using the same combustion device.

FIG. 3 is a sectional view of a combustion apparatus showing another embodiment of the present invention.

FIG. 4 is a sectional view of a combustion apparatus showing another embodiment of the present invention.

FIG. 5 is a sectional view of a conventional combustion device.

[Explanation of symbols]

 11 Vaporizing Section 13 Nozzle 16 Vaporizing Chamber 17 Filter Vaporizing Element 18 Pipe Vaporizing Element 19 Oil Filling Port 21 Mixing Pipe 22 Burner Section

Claims (3)

[Claims] 1. A fuel supply means for supplying fuel, a vaporization section for vaporizing the supplied fuel, a heater for heating the vaporization section, a nozzle for ejecting gas vaporized by the vaporization section,
Equipped with a burner part that burns the gas ejected from the nozzle,
A columnar vaporization chamber for vaporizing fuel is provided in the vaporization section, a columnar inorganic porous body vaporization element is provided on the nozzle side of the vaporization chamber, and a hollow pipe-shaped inorganic material is provided on the refueling side. A combustion device in which a vaporization element of a porous body is arranged, and a filter portion is constituted by a vaporized gas passage portion in the vaporization element and an outlet on the nozzle side. 2. A fuel supply means for supplying fuel, a vaporizing section for vaporizing the fuel, a heater for heating the vaporizing section, a nozzle for ejecting the vaporized gas in the vaporizing section, and a gas ejected from the nozzle for combustion. A columnar vaporization chamber for vaporizing fuel is provided in the vaporization unit, a columnar inorganic porous body vaporization element is provided in the vaporization chamber, and the nozzle side of the vaporization element is left. A combustion device in which the center is hollow and the vaporized gas passage portion in the vaporization element and the outlet on the nozzle side are integrated with the filter portion in the vaporization element. 3. A fuel supply means for supplying fuel, a vaporization section for vaporizing the fuel, a heater for heating the vaporization section, a nozzle for ejecting the gas vaporized in the vaporization section, and a gas ejected from the nozzle. A columnar vaporization chamber for vaporizing fuel is provided in the vaporization unit, and a hollow pipe-shaped vaporization element of inorganic porous material is provided in the vaporization chamber, and a nozzle of the vaporization element is provided. Combustion device with a filter on the side.