JPH0666416A - Fuel vaporizer for burner combustion system - Google Patents

Abstract

PURPOSE:To provide a fuel vaporizer for a burner combustion system in which combustion is stabilized in an extremely short time though combustion has been stabilized in several minutes, its starting power is small and heat quantity of large capacity is generated which has excellent heating efficiency. CONSTITUTION:A heat resistant porous material 2 is provided along a heat generator 1 of a heating mechanism (c), a structure of a fuel supply mechanism (a) is set to a state in which a porous surface of the material 2 is covered with a fuel thin film, and the structure is so formed with the material 2 in a state that part of a fuel thin film 3 to be vaporized by the generator 1 for supplying vaporized gas by heating the film is scattered into an air flow with finely divided particle fuel 4 by the air flow to be supplied by an air supply mechanism (b). The fuel 4, the gas and the air are pre-mixed and supplied to a combustion unit 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner combustion type fuel vaporizer in which combustion is stabilized extremely quickly.

[0002]

2. Description of the Related Art The conventional burner combustion system in which vaporized gas of fuel and air are premixed and sent to a combustion section for combustion is heated to vaporize the fuel, Since the system that mixes the vaporized gas and air and sends it to the combustion section is adopted, the preheating time is long and the power consumption is large when the electric heater is used, and the combustion throttle ratio (T. It is difficult to adjust (DR), and it takes about 60 to 120 seconds until the combustion stabilizes.

The inventor of the present invention has been aware that if the fuel is made into fine particles and mixed before the fuel becomes completely vaporized gas, the starting electric power will be small and the stabilization of combustion will be accelerated, and many will be done. The present invention was completed by carrying out an experiment.

[0004]

The gist of the present invention will be described with reference to the accompanying drawings.

A fuel supply mechanism a, an air supply mechanism b and a heating mechanism c are provided, the fuel supplied from the fuel supply mechanism a is heated and vaporized by the heating mechanism c, and the vaporized fuel and the air are supplied by the air supply mechanism b. In the burner combustion system in which and are premixed and supplied to the combustion section for combustion, a heat-resistant porous body 2 is additionally provided to the heating element 1 of the heating mechanism c, and the fuel is attached to the porous surface of the heat-resistant porous body 2. The structure of the fuel supply mechanism a is set to cover the thin film 3, and the thin fuel film 3 is heated by the heating element 1 for heating the fuel thin film 3 and supplying the vaporized gas.
The heat-resistant porous body 2 is set to have a structure in which a part of the particles is scattered into the air flow as the particulate fuel 4 by the air flow supplied from the air supply mechanism b, and the particulate fuel 4 and the vaporized gas and the air are separated from each other. The present invention relates to a fuel vaporizer in a burner combustion system, which is characterized in that it is premixed and supplied to the combustion section 5.

[0006]

As shown in FIGS. 2 and 3, the fuel thin film 3 is heated on the surface of the heat-resistant porous body 2 by the heating element 1 in a state of covering the holes 2 ', and a part thereof becomes vaporized gas, and at the same time vaporized vapor thereof. A part of the fuel thin film 3 to be vaporized by the pressure and the air flow is scattered as the particulate fuel 4 immediately before the vaporization, and a premixed gas of air, vaporized gas and particulate fuel 4 is supplied to the combustion section 5. The presence of the particulate fuel 4 shortens the combustion stabilization time, and a combustion state with a large heat capacity can be obtained even if the starting power is small.

[0007]

The drawings show a preferred embodiment of the present invention in which a fuel supply mechanism a, an air supply mechanism b and a heating mechanism c are provided, and the fuel supplied from the fuel supply mechanism a is heated by a heating mechanism c.
In the burner combustion method in which the vaporized fuel and air are premixed by the air supply mechanism b and supplied to the combustion section for combustion by the air supply mechanism b, the heat-resistant porous body 2 is added to the heating element 1 of the heating mechanism c. The structure of the fuel supply mechanism a is additionally provided so that the fuel thin film 3 covers the porous surface of the heat-resistant porous body 2, and the fuel thin film 3 to be vaporized by heating the heating element 1 is supplied to the air supply mechanism b. The heat-resistant porous body 2 is set to a state in which the particulate fuel 4 is blown away by the air supply, and the particulate fuel 4, vaporized gas and air are mixed and supplied to the combustion unit 5.

FIGS. 1, 2 and 3 are the first embodiment, and FIGS.
Shows the second, third and fourth embodiments.

The first embodiment will be described.

The heating element 1 may be a rod-shaped body or a cylindrical body, but in the drawing, a window 10 for fuel supply is provided on a part of the ring-shaped heating element 1 outside the cylindrical heat-resistant porous body 2. The case is illustrated.

The heat-resistant porous body 2 is preferably made of glass wool, asbestos, porous ceramics, or the like having heat resistance, and many fine pores 2'through which fuel permeates are sponge-like.

The fuel supply mechanism a may be any one capable of supplying a suitable amount of fuel such as kerosene or petroleum to the heat resistant porous body 2 in a permeated state.

The air supply mechanism b adopts a mechanism including a fan 6 capable of adjusting the air flow rate, and is designed so that the degree of air mixing can be varied to obtain the optimum combustion state. Reference numeral 7 is a combustion gas supply pipe.

The fuel supplied to the porous surface of the heat-resistant porous body 2 is in a state of enlarging the pores 2'when viewed enlarged, and the fuel thin film 3
Is formed.

The fuel thin film 3 is heated by the heating element 1 to generate vapor and swell, and at the same time, the air flow supplied simultaneously scatters into the particulate fuel 4 and the particulate fuel 4
Will be premixed into the air with the vaporized gas.

When the heat-resistant porous body 2 has a large surface area including the pores 2'and a small heat capacity, the rise of combustion is quicker and the generation of malodorous gas during extinguishing is small.

Moreover, a large amount of heat of about 3000 KC can be obtained with a small electric power of 40 W, and an excellent heating effect is exhibited.

FIG. 4 shows the second embodiment, in which the wick 8 hanging from the fuel tank 9 is brought into contact with the heat-resistant porous body 2 to supply the fuel to the heat-resistant porous body 2. Illustrated.

FIG. 5 shows a third embodiment, in which the wick 8 is extended to the upper side of the heat-resistant porous body 2 and fuel is supplied from above and below to improve the fuel supply. ing. FIG. 6 shows a case where the wick 8 is coated on the entire circumference of the cylindrical heat-resistant porous body 2, and the rod-shaped heating element 1
The figure shows the case where is used.

[0020]

EFFECTS OF THE INVENTION In the present invention, the combustion is stabilized in about 1 to 2 minutes in the conventional product, whereas the combustion is stabilized in an extremely short time of 5 to 30 seconds and the starting power is increased. It becomes a fuel vaporizer in a burner combustion system with excellent heating efficiency that generates a large amount of heat with less heat.

[Brief description of drawings]

FIG. 1 is an explanatory view of a usage state showing a first embodiment.

FIG. 2 is an explanatory diagram of fine particle generation in which a part of the heat resistant porous body is enlarged.

FIG. 3 is an explanatory diagram of fine particle generation in which a part of the heat resistant porous body is enlarged.

FIG. 4 is a front cross-sectional view showing a state in which the wick is in contact with the lower side of the heat resistant porous body.

FIG. 5 is a front cross-sectional view showing a state in which the wick is in contact with the heat-resistant porous body from above and below.

FIG. 6 is a front cross-sectional view showing a state in which a wick is provided along the entire circumference of a heat resistant porous body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating element 2 Heat-resistant porous body 3 Fuel thin film 4 Particulate fuel 5 Combustion part a Fuel supply mechanism b Air supply mechanism c Heating mechanism

Claims (1)

[Claims] 1. A fuel supply mechanism, an air supply mechanism, and a heating mechanism are provided, the fuel supplied from the fuel supply mechanism is heated and vaporized by the heating mechanism, and the vaporized fuel and air are premixed by the air supply mechanism. In the burner combustion system in which the heat is supplied to the combustion unit and burned, a heat-resistant porous body is added to the heating element of the heating mechanism, and the fuel supply mechanism is in a state where the porous thin film covers the porous surface of the heat-resistant porous body. The structure of is set, and a part of the fuel thin film that is going to be vaporized by the heating element that heats the fuel thin film and supplies the vaporized gas is scattered into the air flow as the particulate fuel by the air flow supplied from the air supply mechanism. A fuel vaporizer in a burner combustion system, characterized in that the structure of a heat-resistant porous body is set in a state, and the particulate fuel, vaporized gas, and air are premixed and supplied to a combustion section.