JPS61107009A - Catalystic heater - Google Patents

Abstract

PURPOSE:To enable a hot temperature heating to be performed and expand a scope of application of the catalyst type heater by a method wherein a sufficient feeding of surrounding atmosphere is carried out to promote a generation of the mixture gas and an effective contact between the catalyst carrier and the mixture gas is performed. CONSTITUTION:Organic volatile material 3 and oxidation catalyst carrier 2 are stored in an outer enclosure 1. A heater plate 4 is arranged on the upper surface of the oxidation catalyst carrier 2 in parallel with the carrier. Aeration hole 2a in the oxidation catalyst carrier 2 is vertically arranged, its lower opening is oppositely faced against the organic volatile material 3 and its upper opening is oppositely faced against the heating plate 4. A supporting washer plate 4 is composed of a frame plate 5a and an inverted L-shaped fixing arm plate 5b. Thus, a honeycomb ceramic is mounted on the frame plate 5a, a lower surface edge of the ceramic is supported by each of the frame pieces and at the same time the heating plate4 is applied to cover the upper surface of the honeycomb ceramic with a clearance 6 being left therebetween, the fixing plates 4a arranged at both edges of the heating plate 4 and the fixing arm plate 5b are overlapped with spacers 7 therebetween and they are fastened with screws 8 so as to make an integral assembly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a catalytic heater in which an oxidation catalyst carrier is brought into contact with an organic volatile material, which is a combustible gas, to produce a combustion exothermic reaction.

The catalytic heat generator constitutes, for example, a heat source for various fume generators that heat and evaporate insecticidal materials or aromatic materials, or a heat source for water heaters, hot water heaters, and the like.

Technical Background of the Invention In general, the catalytic heating device is arranged in an envelope so that the catalyst carrier is on top and the organic volatile material is on the bottom. The structure is such that a combustible gas that is more volatile is mixed, and the four-component gas is brought into contact with a catalyst carrier to cause a combustion reaction and generate heat.

For example, in a hume generator, a heating plate is heated with the above reaction heat, an insecticidal mat or an aromatic mat (mat impregnated with each hume component) placed on the heating plate is heated, and the hume components are evaporated. take.

Therefore, the above-mentioned fume generator and the like are required to generate an exothermic reaction as quickly as possible due to their commercial purpose, and to be able to quickly and reliably obtain the necessary high temperature.

These performances depend on whether outside air is introduced stably and sufficiently, its mixing with combustible gas is promoted, and whether the mixed gas is brought into active contact with the catalyst carrier.

Generally, the above-mentioned outside air is introduced from the side of the envelope, and an exhaust section is provided at the top, and during this process, the above-mentioned gases are brought into contact for mixing and reaction to obtain the desired heat generation.

However, this type of intake structure lacks the effect of attracting outside air into the envelope, and tends to be insufficiently mixed with the combustible gas that volatilizes and rises within the envelope. It is inferior in terms of the ability to efficiently contact the metal, which causes the exothermic reaction to start up and slow down in reaching high temperatures.

Also, for example, for pyrethroid drugs intended to kill insects such as mosquitoes, heat generation up to 200'C is sufficient, but if the hume component requires heat generation at a higher temperature, conventional hume generators have a limit to the heat generation temperature. It is difficult to meet the demand.

Purpose of the Invention The present invention allows sufficient introduction of outside air, promotes the generation of mixed gas, and makes contact between the catalyst carrier and the mixed gas more effective to reduce the high-temperature heat generation at the above-mentioned temperature in the catalyst carrier. and increase the coverage of catalytic heaters to e.g. 300
To provide a heat generator that can be used for heating and evaporating agricultural chemicals that require heat generation of 'C' and chemicals for exterminating cockroaches.

The present invention also provides a catalyst heat generator that makes the reaction between the catalyst carrier and the combustible gas more sensitive, allows the predetermined exothermic temperature to be reached more quickly, and makes the combustion exothermic reaction in the catalyst carrier more stable.

Structure of the Invention In order to achieve the above object, the present invention provides a catalytic heating device in which an oxidation catalyst carrier is arranged above the organic volatile material, and the organic volatile material is arranged at the inner bottom of an envelope constituting the heating device. At the same time, an intake port is provided in the bottom wall of the envelope to penetrate the organic volatile material, preferably, the intake port is provided through the center of the organic volatile material, and the bottom end of the intake port is in contact with the outside air. The upper end of the intake port is opened near the volatilization surface of the organic volatile material to generate an upward airflow that can flow through the organic volatile material through the intake port, and the organic volatile material is volatilized at the chest circumference of the upward airflow. In addition, the upper opening of the intake port is arranged directly below the oxidation catalyst carrier to prevent the mixed gas from coming into contact with the catalyst carrier in the ascending air flow path. It is characterized by a structure in which an exothermic combustion reaction is caused to occur, and the exothermic action further promotes the inflow of outside air and the generation of a mixed gas, thereby promoting the reaction.

Embodiments of the Invention The present invention will be further detailed as follows based on the embodiments shown in FIGS. 1 to 5.

The drawing illustrates a fume generator. In the figure, 1 indicates the envelope of the fume generator. 2 shows a catalyst carrier on which an oxidation catalyst is supported by coating, impregnation, or other methods; a typical example is honeycomb ceramic.

Further, 3 indicates a liquefied or solidified organic volatile material such as butane or methanol, which is a combustible gas.

□The organic volatile material 3 and the oxidation catalyst carrier 2 are housed in the envelope 1 so that the former is on the lower side and the latter is on the upper side.

Reference numeral 4 denotes a heating plate for heating the mat supporting the hume component, and is installed parallel to the upper surface of the oxidation catalyst carrier 2.

The honeycomb ceramic serving as the oxidation catalyst carrier has a rectangular parallelepiped shape, and its ventilation holes 2a' are arranged in the vertical direction, with the lower opening facing the organic volatile material 3 and the upper opening facing the heating plate 4, respectively.

FIGS. 4 and 5 show an assembly of the oxidation catalyst carrier 2 and the heating plate 4 that hold them in the above positions. In the same figure, 5
is a supporting seat plate of honeycomb ceramic, and the seat plate 5 includes a frame plate 5a and a reverse side that extends along the side surface of the honeycomb ceramic from the pair of frame pieces of the frame plate 5a, and further bends to the side. It consists of a shaped mounting arm plate 5b.

Then, the honeycomb ceramic is placed on the frame plate 5a and its lower edge is supported by each frame piece, and the heating plate 4 is placed on the upper surface of the honeycomb ceramic with a gap 6 left in between. The mounting plate 4a provided on both ears and the mounting arm plate 5b
are stacked with a spacer 7 in between and tightened with a screw 8 to assemble them together.

The spacer 7 forms a gap 6 between the honeycomb ceramic upper surface of the catalyst carrier and the heating plate 4. Depending on the implementation, a heat insulating spacer 9, for example a ceramic piece, is interposed in the gap 6 to hold down the honeycomb ceramic, and the supporting seat plate 5 and the heating plate 4 are
The ceramic is held firmly between the The side surface of the honeycomb ceramic may be sandwiched and held between the upright plate portions 50 of the mounting arm plate 5b.

Further, the assembly as described above is screwed to the upper wall of the envelope 1 using the mounting arm plate 5b, and integrated with the envelope 1. A spacer 11 is also provided between the mounting arm plate 5b and the upper wall of the envelope.
, and float the entire assembly as shown.

Although not shown, an exhaust hole is provided in the envelope l so as to cover the heating plate 4 and its assembly.

The organic volatile material 3 is held at the inner bottom of the envelope 1, facing directly below the oxidation catalyst carrier assembly arranged as described above.

The organic volatile material is used in a solid state or in a liquefied state, and in the case of liquefaction, the material impregnated with this is retained. In order to make the organic volatile material exchangeable, for example, as shown in the figure, a container part (envelope leg part) lb that accommodates the organic volatile material and an envelope head part 1a that holds the catalyst carrier assembly are combined. It can be fitted and removed using the connecting portion 12. Although not shown, the organic volatile material 3 may be held in a capsule, and the capsule may be detachably attached to the bottom of the envelope.

Furthermore, an envelope bottom wall 13 forming a storage chamber for the organic volatile material.
One or more intake ports 14 are provided in the organic volatile material 3.
penetrate. That is, the organic volatile material 3 is arranged so as to surround the intake port 14 . 17 is a nozzle forming the intake port 14.

Preferably, the air inlet 14 is provided through the center of the organic volatile material 3 as shown in FIG.

Thus, the lower end of the intake port 14 is opened at the bottom surface of the envelope in contact with the outside air, and the upper end of the intake port 14 is opened near the volatilization surface of the organic volatile material. The envelope l is provided with leg pieces 15,
An air sampling space 18 is formed directly below the opening at the lower end of the intake port 14, and outside air is caused to flow into the air sampling space 18 under the bottom surface of the envelope through the ventilation section 16 between the legs 15, and then 14 into the envelope l without being affected by disturbance factors.

As a result of the above, the outside air flows into the envelope through the intake port 14 as an upward current that can flow through the organic volatile material. On the other hand, the organic volatile material 3 is promoted to volatilize around the rising air current, and the exchange and mixing with the combustible gas volatilized and rising from the organic volatile material 3 is facilitated, and the generation of mixed gas is promoted.

The oxidation catalyst carrier 2 is placed on the rising air flow path from the intake port 14.
Place. That is, the upper opening of the intake port 14 is arranged directly below the oxidation catalyst carrier 2, so that the rising airflow of the mixed gas directly collides with the oxidation catalyst carrier 2, and the air inlet 2a
The structure is such that it flows through and collides with the heating plate 4.

As a result of the above, an active combustion exothermic reaction is obtained in the oxidation catalyst carrier 2, and the carrier 2 rapidly becomes red-hot to a predetermined high temperature. The convection heat hits the heating plate 4, heats it with good thermal efficiency, and heats the hume component-supporting mat placed thereon. As a result, the gasified hume component is diffused into the atmosphere and exerts a predetermined effect.

As the combustion exothermic reaction occurs in the oxidation catalyst carrier 2 and the surrounding atmosphere becomes high temperature, this further generates an attractive force for upward airflow from the intake port 14, promoting the introduction of outside air.

This further increases the combustion exothermic reaction mentioned above, creating a virtuous cycle.

As shown in FIG. 2A, the intake port 14 is configured such that the nozzle 17 forming the intake port 14 is provided only in a part of the intake port 14, and the organic volatile material 3 is exposed within the intake port 14. Also good. Further, as shown in FIG. 2B, it is possible to provide a conical nozzle 17 so that the intake port 14 becomes narrow at the top, or to use this together with a conical nozzle 17 to provide a through hole 17a in the inner wall of the nozzle 17. be.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, as described in detail, outside air can be quickly introduced into the envelope from the bottom wall of the envelope as an upward airflow. Then, the combustible gas is evaporated around the rising air current, allowing good exchange and mixing between the two, thereby promoting the generation of mixed gas.

Furthermore, the mixed gas rides on the upward airflow and directly collides with the lower surface of the oxidation catalyst carrier, causing an extremely active combustion exothermic reaction. Furthermore, the rise in the heated atmosphere accompanying this combustion exothermic reaction more strongly induces an upward flow of outside air from the intake port directly below, further promoting the generation of mixed gas. As a result, a favorable result is produced in which the combustion exothermic reaction in the oxidation catalyst carrier is further promoted.

As a result of the above, the present invention has been able to provide a catalytic heat generator in which the combustion exothermic reaction is sharp, the rise to a predetermined high temperature is good, and the oxidation reaction is stable. In addition, high-temperature heat generation of 200°C or more, about 300°C, which was previously thought to be difficult to generate stably when applied to this type of catalytic heat generator, especially a fume generator, can be easily obtained.For example, it can be used to exterminate cockroaches, The scope of its use can be further expanded, such as by heating and gasifying imperial medicines.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a catalytic heat generator showing an embodiment of the present invention, FIGS. 2A and B are enlarged sectional views showing embodiments of the intake port, and FIG. 3 is a bottom view of the catalytic heat generator shown in FIG. 1. 4 is an exploded perspective view showing the assembly of the oxidation catalyst carrier and the heating plate, and FIG. 5 is an assembled perspective view. DESCRIPTION OF SYMBOLS 1... Envelope, 2... Oxidation catalyst carrier, 3... Organic volatile material, 4... Heating plate, 1'4... Inlet port, 15...
...Leg piece, 17... Nozzle, 18... Air intake space.

Claims (3)

[Claims] (1) Arrange the organic volatile material at the bottom and the oxidation catalyst carrier at the top in the envelope, and bring the flammable gas that volatilizes and rises from the organic volatile material into contact with the oxidation catalyst carrier to cause a combustion reaction and generate heat. In the catalytic heating device, the organic volatile material is disposed at the inner bottom of the envelope, and an intake port is provided in the bottom wall of the envelope to penetrate the organic volatile material, and the lower end of the intake port is connected to the outer envelope in contact with outside air. The flammable gas is opened at the bottom of the vessel, and the upper end of the intake port is opened near the volatilization surface of the organic volatile material, and an upward air current that can flow through the organic volatile material is generated through the intake port to volatilize the flammable gas from the organic volatile material. The catalyst is characterized in that the upper opening of the intake port is arranged directly below the oxidation catalyst carrier, and the mixed gas comes into contact with the catalyst carrier in the ascending air flow path. Heat generator. (2) A catalytic heat generator according to the invention as set forth in claim 1, wherein the inlet port is provided through the center of the organic volatile material. (3) The catalytic heat generator according to the invention as set forth in claim 1, wherein a space is formed below the lower opening of the intake port.