JPS6233212A - Catalyst combustion device - Google Patents

Abstract

PURPOSE:To provide a catalyst combustion device capable of performing a stable combustion by a method wherein a gasification for restricting a flow rate of liquefied petroleum gas and gasifying it and an injector device for mixing the gasified gas with air and supplying them to a catalyst are provided, and a calorie of the catalyst is transmitted and supplied to the gasification part through a superior thermal conductor. CONSTITUTION:Gas discharged from a nozzle 29 passes through a high expansion pipe 25 and a low expansion pipe 32 and is supplied to a catalyst 36 attached to the pipe 25. Combustion heat of the catalyst simultaneously heats the high expansion pipe 25 and the low expansion pipe 32. A surface of the pipe 32 abutting against the nozzle 29 moves in a direction away from the nozzle because of a difference of thermal expansion rate. The nozzle is biased by a spring 27, the valve 26 abuts against a nozzle base block 24 in compliance with a movement of the pipe 32 to shut off a supplying of gas. As a temperature of the catalyst 36 decreases, the supplying of gas is started again. With such an arrangement as above, the heat having expanded the high expansion pipe 25 is transmitted to the nozzle base block 24. The heat generated by gasification is removed by the nozzle base block 24 and the receiving fitting 23. This heat is supplied by the catalyst 36 and prevents a temperature of the nozzle base block 24 acting as the gasification part from being decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a catalytic combustion device for general household use using liquefied petroleum gas.

BACKGROUND OF THE INVENTION Conventionally, this type of catalytic combustion apparatus has had a structure as shown in FIG. This hair curler is shown in FIG. 3, and 1 is a resistor which functions to suppress the amount of liquefied gas flowing out under the pressure of a tank 2 to a constant amount. The liquefied gas, which is held down to a certain amount, receives heat from its surroundings and vaporizes. That is, this resistor 1
This is the liquefied gas vaporization device itself. The vaporized gas passes through the valve part 3 and nozzle 4 and is ejected from a micro hole 5 of about 60 μm, draws in air from the surroundings through a hole 10 in a part of the injector (gas to air about 1:30), and supplies it to the catalyst 8. . 6
and 7 are two pipes with different coefficients of thermal expansion, and receive the combustion heat of the catalyst 8 installed on the outside of these pipes, and the valve part 3 of the nozzle 4 is opened and closed by the difference in thermal expansion of these two wooden vibros and 7. to control combustion temperature.

9 is a lamp wick, and 11 is an ignition device.

Problems to be Solved by the Invention In the conventional configuration, gas is always vaporized in the vaporizer, which removes heat and lowers the temperature.This heat is replenished by heat conduction from the surroundings. only. Therefore, when the gas flow rate is increased, the heat due to heat conduction from the surroundings cannot compensate, and the vaporization temperature of the liquefied gas (
For isobutane, the temperature is lower than -10°C. This requires a 1:1 structure in which the vaporizer is fixed to a part of the resin tank 2, and the nozzle 4 is inserted into a cylinder that uses part of the tank 2.
That's why it becomes more noticeable. According to experiments, when 6-6 nylon is used as the material for tank 2, the temperature is 2.
At 0°C, the temperature of the vaporizing section reached 110°C to -15°C when the gas flow FJ (50 cc/min) was applied, and the gas ejected from the nozzle 4 began to be mixed with liquid. When gas is ejected in a liquefied state, by the time the gas reaches the catalyst, it is vaporized by the combustion heat from the surroundings, but when it passes through a part of the injector on the way, it is still in a liquid state and its volume is reduced to gas. Because it is extremely small compared to the state of If there is a shortage, there is a problem of incomplete combustion.

An object of the present invention is to provide a catalytic combustion device that can improve the incomplete combustion state when the gas flow rate is large and perform stable combustion.

Means for Solving the Problems The catalytic combustion device of the present invention includes a vaporizer that vaporizes liquefied petroleum gas by restricting its flow rate, and an injector device that mixes the gas vaporized by the vaporizer with air and supplies the mixture to the catalyst. The present invention is characterized in that it is configured to prevent catalytic combustion by providing a catalytic converter, and is configured to transmit and replenish the catalyst suspension to the vaporizing section of the vaporizing device via a good heat conductor.

Function: According to this configuration, not only does heat due to heat conduction from the surroundings become heat of vaporization, but also heat is guided from the heat source to compensate for the lack of heat of vaporization. Stable combustion can be achieved without any spewing out. In addition, the required amount of heat can be determined by appropriately selecting the distance between the vaporizer and the catalyst and the thermal conductivity of the heat transfer body.
Can be set freely.

Embodiment FIG. 2 shows an embodiment of the catalytic combustion apparatus of the present invention.
The figure shows the #\ details of the nozzle and vaporizer of Figure 2. 1st
In the figure, 20 is a lamp wick, and the liquefied gas 4 in the tank 42 is
1 is sucked up by capillary action. 21 is a semipermeable membrane having countless holes, and this is a resistor that regulates the flow rate of the liquefied gas. 2
Reference numerals 2 and 23 are a sleeve body and a receiving metal fitting that press and seal the semipermeable membrane 21, respectively, and 24 is a nozzle base, to which a high expansion pipe 25, which is a reference member of the temperature control mechanism, is welded and fastened. A valve 26 is in contact with the inside of the nozzle base 24, and by opening and closing this part, the gas flow rate is adjusted and the temperature is controlled. The force biasing the valve 26 is transmitted by a spring 27 via a support 28 to a nozzle 29 to which the valve is mounted. As shown in the figure, a rim 30 having a hole extending through the inside and a gas ejection port with a diameter of 60 μm is fixed at the tip. 31 is an O-ring, which seals the gas. When the valve opens, gas is ejected from the hole in the rim 30 at high speed through the hole in the nozzle. 32
is a low expansion vibrator, and the valve 26 is opened or closed depending on the position of this pipe.

In Fig. 2, the gas coming out of the nozzle draws in air about 30 times the volume of the gas through the intake hole 33 made in the low-expansion vibe 32 (injector effect due to gas flow rate).
, a hole 34 made in the high expansion vibe 25 and the low expansion vibe 32
．． tX36 attached to pipe 25 through 35
supplied to The gas supplied to the catalyst 36 is sent to the ignition device 3
7 (for example, a heater using a battery) to a temperature at which catalytic reaction is possible, and catalytic combustion begins. The heat generated by the catalytic combustion is transferred to the heat via 38, and this heat via 3
With a heat rating of 8, it is used, for example, to wrap and curl hair or to heat various things.

Note that such combustion heat of the catalyst also warms the high expansion pipe 25 and the low expansion pipe 32 at the same time.

Both pipes 25 and 32 are fastened together through a screw base 39 and an adjustment screw 40, and the other end of the vibrator 25 is fixed to the nozzle base 24. Now, when both pipes 25 and 32 are heated at the same time, the surface of the vibrator 32 that is in contact with the nozzle 29 moves in a direction away from the nozzle due to the difference in coefficient of thermal expansion. Since the nozzle is biased by the spring 27, it moves in accordance with the movement of the vibrator 32, and the valve 26 moves to the nozzle base 24.
The gas supply was cut off.

Touch! When the temperature of A36 drops, the nozzle 2 of the vibrator 32
The surface that is in contact with nozzle 9 moves in the direction of pushing down nozzle 29 and starts supplying gas again. This controlled temperature can be easily adjusted by adjusting the screw 40 and changing the relative position of the vibrators 25 and 32. 43 is a combustion gas shielding plate, and 44 is a gas vent hole.

With this configuration, the heat that expands the high-expansion vibe 25 is transmitted to the nozzle base 24. In the experiment, 5US321 was used as the high expansion vibrator 25, and brass was used for the nozzle base 24. The heat due to vaporization is transferred to the nozzle base 24 and the bracket 2.
3, but this heat is supplied from the catalyst 36 through the high expansion vibrator 25, and is then supplied to the nozzle base 2 as a vaporizer.
4. It is possible to prevent the temperature drop.

In addition, the amount of heat supplied via the high expansion vibe 25 depends on the temperature of the catalyst 36 and the distance between the catalyst 36 and the nozzle base 24.
It is determined by the shape, material, etc. of the high expansion vibrator 25. Therefore, the amount of heat required can be set by determining these shapes.

Furthermore, since the high expansion vibrator 25 and the nozzle base 24 are directly fixed, the number of variables in temperature control is reduced, and more accurate temperature control is possible.

As described in the detailed description of the invention, the catalytic combustion device of the present invention not only converts heat due to heat conduction from the surroundings into vaporization heat, but also conducts heat from the heat source to compensate for the lack of vaporization heat. Even if the flow rate of the gas is increased, the temperature of the vaporization section can be prevented from decreasing, and no liquid gas will be ejected from the nozzle, making it possible to perform stable combustion. Moreover, the required amount of heat can be freely set by appropriately selecting the distance between the vaporizer and the catalyst and the thermal conductivity of the heat transfer body.

[Brief explanation of drawings]

Fig. 1 is an enlarged cross-sectional view of essential parts of an embodiment of the catalytic combustion device of the present invention, Fig. 2 is a cross-sectional view of a hair curler adopting the configuration shown in Fig. 1, and Fig. 3 is a cross-sectional view of a conventional hair curler. It is. 24... Nozzle base, 25... High expansion vibe, 26
...Valve, 29...Nozzle, 32...Low expansion vibrator, 3G...Catalyst, 37...Ignition device, 40...Adjustment screw representative Yoshihiro Morimoto Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1. A method for catalytic combustion by providing a vaporizer that vaporizes liquefied petroleum gas by restricting its flow rate, and an injector device that mixes the gas vaporized by the vaporizer with air and supplies it to a catalyst. A catalytic combustion device configured to transmit and replenish the heat of the catalyst to the vaporization section of the vaporization device via a good heat conductor. 2. The injector device is composed of concentric double tubes made of a low expansion material on the inside and a high expansion material that is a good thermal conductor on the outside, and the catalyst is attached to the high expansion material on the outside, and the inner low One end of the expansion material and one end of the outer high expansion material are connected, the other end of the inner low expansion material is brought into contact with the valve part of the vaporizer to control the gas flow rate, and the other end of the outer high expansion material is connected to the vaporization device. 2. The catalytic combustion device according to claim 1, wherein the catalytic combustion device is configured to be connected to the vaporization section of the catalytic converter to supply catalytic heat.