JPS58127009A - Burner utilizing catalyst - Google Patents

Abstract

PURPOSE:To improve the convergency and emissivity of radiated heat by forming a catalyst combustion surface in a convex surface or concave surface. CONSTITUTION:A burning member is obtained by attaching on the both sides of a gas resistor 1 comprising a fibrous mat of a high density and heat resistance platinum-born cloth catalysts 2, 2 which are obtained by dipping a silica cloth woven with silica fiber as twisted yarn into water solution of platinum chloride, drying sufficiently and sintering for several hours at a temperature 400-600 deg.C; superposing stainless mesh members 3 and 4 on the both sides thereof; and molding under pressure by a convex-shaped or concave-shaped jig, with 10-20mm. of peripheral parts remained unmolded. The unmolded parts of the burning member is fitted to a U-shaped fixation frame 5 and pressed on the entire periphery of the frame by a keeping frame 7, and then fixed to a gas storing tank 6 by means of screws 8 and nuts 9 both engaged at appropriate positions. Thus the catalyst burning surface can be used in the convex surface or concave surface selectively in accordance with the usage of the combustor.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a catalytic combustor that burns gaseous or liquid fuel using a catalyst.

In conventional combustors that use gas or liquid as fuel, the heat generated is mainly absorbed by the heated object by convection, but in reality there is air between the combustor's heating element and the heated object. Therefore, most of the heat generated is heated to yellow the air. For this reason, in order to raise the temperature of the object for the purpose of heating, it is necessary to generate more heat than necessary, so 21. , so-called wasteful use of heat5, and even more so, the wasted use of fuel. In order to further reduce the propagation of heat due to this convection, many combustors are seen that utilize heat reflection by providing a reflective plate on the back side of the heating element.

Furthermore, a heating plate made of ceramic or the like is provided as a second heating element in front of the heating element, and by heating this cutting edge heating plate and extracting the radiant heat from this heating plate force, the total calorific value can be reduced. Convection 1 reflection as a form of heat extraction.

Efforts are being made to make the proportion of radiation more radiant. However, all of these methods attempt to extract heat by radiation or reflection, which has a high heat propagation efficiency to the heated object, by utilizing heat through flame combustion indirectly rather than directly. be. In addition, in these indirect methods of extraction, it goes without saying that increasing the temperature of the flame itself as a heat source increases the rate of generation of light energy that is unnecessary as a heat source. Therefore, the proportion of heat energy extracted from the supplied fuel energy must be low.

From this point of view, it is considered desirable to have a combustor that has a combustion form that only generates so-called hot rays. Catalytic combustion using a catalyst is an example of such combustion. Catalytic combustion differs from three-dimensional diffusion combustion methods such as flame combustion, and is a pure oxidation reaction combustion at the entrance surface of the catalyst, that is, two-dimensional. Compared to the high temperature of around 1000'C of the flame produced by Mo-well combustion (around 600'C),
It is close to so-called black body radiation, and the radiation wavelength range is mostly in the infrared to far infrared range.Especially for sensory heating, heat absorption by heat shields such as clothing is used. It can be said to be efficient with little loss.

The uninvented catalytic combustor can be used by making the catalytic heating surface convex or concave.

It is designed to emit or focus radiant heat from a heat generating surface.

Below is the implementation of the diagram? The details of the configuration of the present invention will be explained with reference to lJ'.

A silica cloth made of twisted silica fibers is immersed in an aqueous solution of chloroplatinic acid on both sides of a gas resistor 1 made of high-density heat-resistant fiber matt strength, and after thoroughly drying, 4o~
Platinum-supported cross catalyst 2 obtained by firing at 600°C for several hours
, 2 are stacked, and both sides are covered with stainless steel mesh body 3.
, 4, the surrounding area 10-20ml1r
The rest was press-formed using a convex or concave jig to obtain a combustion body in which both concave or convex surfaces were catalytic surfaces. The peripheral part of this object is placed in the U-shaped fixing frame 5, and the fixing frame 5 is then installed on the upper edge of the gas reservoir tank 6, and after pressing the entire circumference with the presser frame 7 from above, a suitable Screw the part 8
I fixed the gas reservoir at Natsu 9 and 6. Here, a catalytic combustor which can be fixedly installed with either a concave or convex catalytic combustion surface selected according to the purpose of the combustor has been obtained.

The catalytic combustor according to the above embodiment, when the purpose of the combustor is used for individual heating, uses a concave combustion surface as shown in Fig. 5, compared to one using a 5-plane combustion surface. , radiant heat 5 , , , 5 convergence is high and heating efficiency can be increased.

On the other hand, contrary to the diagram, by turning the catalytic combustion body upside down and using a convex combustion surface, the radiation range can be expanded, the heating area can be expanded, and several heaters of the same type can be used together. By overlapping each other's regions, it is possible to uniformly make a radiant region wider than the heating region possible with plane combustion.

In this case, the greater the curvature of the combustion surface, the wider the radiant heating area per unit.

In this way, depending on the purpose of heating, you can use a concave combustion surface or
On the other hand, by reversing the installation of the combustion section, it is possible to create a convex combustion surface, which allows a single device to have both the functions of converging and diverging the radiation dose.

In addition, in Examples, as a specific example.

As for the catalyst, we have mentioned platinum-supported silica cloth catalyst, but the type and shape of the catalyst will vary depending on the type of fuel.
It goes without saying that the most suitable one may be used depending on the type of reaction, and furthermore, when using liquids or fuels, it is also advisable to provide equipment for 6) cooling and vaporizing. This does not impede the effects of the present invention.

As described above, the catalytic combustor of the present invention can use the catalytic combustion surface as a concave curved surface or a convex curved surface, and therefore can be used with enhanced convergence or dissipation of radiant heat, and can be used depending on five purposes. This has the advantage of being possible.

BRIEF DESCRIPTION OF THE DRAWINGS The figure is an exploded cross-sectional front view of an embodiment of a catalytic combustor according to the present invention. 1... Gas resistor, 2... Cross catalyst, 3, 4... Mesh body, 5... Identification frame, 6... Gas reservoir tank, 7... Presser frame.

Claims (1)

[Claims] A catalytic combustion body having a melt combustion surface on both the front and back surfaces, and both surfaces having contradictory convex and concave curved surfaces, can be used by reversibly changing the mounting direction of both combustion surfaces as necessary. A catalytic combustor characterized by being removably attached to a gas reservoir tank.