JP2002147718A - Gas burner combustion device utilizing metal oxidation catalyst - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas burner combustion device using a metal oxidation catalyst that performs flameless low-temperature combustion by using gaseous fuel at a low concentration and transfers radiant heat like far infrared radiation. SOLUTION: In a gas burner combustion device utilizing a metal oxidation catalyst comprising an automatic control part 140 regulating the quantity of fuel to control an automatic fuel regulating valve 125 and an air-regulating valve 115 regulating the quantity of air, a mixer 130 has a means mixing the supplied fuel with air. A gas burner 160 comprises a support radiating the heat burned by the metal oxidation catalyst, a protective net, a heat insulating means, the metal oxidation catalyst generating un-catalytic-reaction activation energy, a preheater having a heating layer, a honeycomb-shaped diffusion net and housing, and has a structure in which the fuel-air mixture supplied through a fuel-air mixture pipe 131 is sealed. The metal oxidation catalyst of the gas burner 160 is a diffusion type with platinum, palladium or rhodium evaporated to stainless steel having excellent durability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas burner combustion apparatus using a metal oxidation catalyst, which enables low-temperature flameless combustion using a low-concentration gaseous fuel and uses a catalyst apparatus that transmits radiant heat. Also, the present invention relates to a gas burner combustion device using a metal oxidation catalyst using a catalyst material obtained by depositing platinum Pt, palladium, and rhodium on stainless steel having excellent durability.

[0002]

2. Description of the Related Art In general, catalytic combustion is adsorbed on the surface of a catalyst by diffusion of fuel gas, and an oxidation reaction occurs on the surface of the catalyst, and the generated gas is diffused and desorbed on the surface of the catalyst to transfer heat. Therefore, it is burned without flame by the catalytic reaction activation energy which is not light energy. In other words, it is essentially flameless by oxidizing the fuel at relatively low temperatures or concentrations using a solid catalyst, which significantly reduces the production of nitrogen oxides and carbon monoxide generated during combustion. At the same time, the energy generated during flame combustion at low temperatures is used.

[0003] There has been a development regarding a new combustion that takes into account the emission control of pollutants, energy efficiency and safety.
As one of new combustion methods for satisfying such requirements, there has been a demand for catalytic combustion in which a catalyst is applied to a combustion reactor to perform a surface reaction.

FIG. 1 shows a forced convection diffusion type combustion device using a conventional catalyst device. Fig. 1 shows a conventional technology that uses a catalytic reaction to prevent pollution such as nitrogen oxides and carbon monoxide while reducing the damage of smoke generated during flame combustion. The use of a catalytic combustor for air diffusion in the catalytic combustor can be applied to the process without air, not premixed air, the reaction of the catalytic combustion through the catalytic combustor forced air Activate
This is a forced convection diffusion type combustion device using a catalyst device that obtains a useful far-infrared radiation effect at 300 ° C or lower.

The technical structure for achieving the above object is as follows. The catalytic combustor 1 is provided with a fuel supply unit 10 and an air supply unit 20 for supplying a normal temperature air and a fuel gas to the main body, respectively, and is largely divided into a combustion unit 30.

A fuel supply unit 10 controls the fuel supply from a controller 2 to a fuel supply pipe 10a for supplying fuel to a catalytic combustor 1.
1 A solenoid 11 is provided, and a fuel flow meter 12 for measuring an amount of gas to be supplied is connected to a fuel supply pipe 10a on the first solenoid 11 side, and a fuel flow rate is connected to a fuel supply pipe 10a on the fuel flow meter 12 side. A fuel adjusting valve for adjusting the air flow is provided, an air adjusting valve 24 for adjusting the amount of air is provided in the air supply pipe 20a on the side of the air flow meter 22, and one side of the air supplying pipe 20a is provided below the catalytic combustor 1. An air distributor 25 is provided for uniformly dispersing the air.

The combustion section 30 includes a heating layer for supplying heat required for initial catalytic combustion from an air distributor 25 and a fuel distributor 14 which are provided so as to be interconnected to the fuel supply section 10 and the air supply section 20. A heating wire 31 having a predetermined thickness is provided under the heating wire 31 and a thermostat made of a heat insulating material is provided for automatically switching the heating wire 31 at the time of a catalytic reaction. The layer 33 is provided so as to be in close contact.

A gas analyzer 40 having a thermoelectric band 41 for measuring the temperature of the catalyst layer 33 is provided in the middle of the front surface of the catalyst layer 33.

The catalyst layer 33 is used by bringing a rhodium catalyst into an aluminum mat having a large surface area and heat resistance.

[0010]

SUMMARY OF THE INVENTION The present invention provides a gas burner combustion apparatus using a metal oxidation catalyst which has a higher thermal efficiency and generates an uncatalyzed reaction activation energy, thereby using a metal oxidation catalyst which is more excellent in durability. The purpose is to:

[0011]

SUMMARY OF THE INVENTION The present invention relates to a gas burner combustion device using a metal oxidation catalyst, which includes an air supply pipe connected to an air supply line for supplying air, and a fuel supply line for supplying gas. A fuel supply pipe connected to supply fuel, a mixer for mixing air supplied through the air supply pipe with fuel supplied through the fuel supply pipe, and a gas mixture of the air mixed fuel mixed by the mixer. It comprises an air-mixed fuel pipe to be supplied to the burner, and a gas burner for burning the air-mixed fuel supplied through the air-mixed fuel pipe. Advantageous Effects of Invention According to the present invention, a gas burner combustion using a metal oxidation catalyst that performs radiant heat transfer such as far infrared rays generated by enabling non-flame low-temperature combustion by using low-concentration gas fuel with improved fire safety. An apparatus can be provided.

According to the present invention, the mixer has a screw or an amorphous spring inside the mixer as a means for mixing air supplied through the air supply pipe and fuel supplied through the fuel supply pipe. .

According to the present invention, the gas burner is provided with a support for radiating heat combusted by the metal oxidation catalyst generating uncatalyzed reaction activation energy, and is provided under the support to protect the metal oxidation catalyst. And a band-shaped rectangular heat blocking means having a predetermined thickness provided under the protection mesh to block conduction of heat generated by the metal oxidation catalyst, and the heat blocking. A metal oxidation catalyst provided under the means, and heating for supplying heat required for initial combustion of fuel supplied through the air-mixed fuel pipe while being provided at a predetermined interval below the metal oxidation catalyst. A pre-heater having a layer, and a honeycomb-shaped diffusion for diffusing fuel burned by the metal oxidation catalyst so as to cover the metal oxidation catalyst from below by surrounding the pre-heater in a honeycomb shape. If, comprises a housing mounted under the diffusion net, air fuel mixture to be supplied is a structure that is sealed through the air mixing fuel pipe.

[0014] The gas burner is preheated through the preheater and shut off after being preheated, and a fuel supply pipe is provided in the fuel supply pipe for controlling a fuel supply amount according to a temperature detected by a temperature sensor provided in the gas burner. An automatic control is provided for controlling an automatic fuel control valve that can automatically adjust the ratio. The air supply pipe is provided with an air control valve for appropriately adjusting the air ratio.

[0015] The metal oxidation catalyst of the gas burner is a diffusion type, durable stainless steel with platinum Pt,
Palladium or rhodium is deposited.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of the present invention which achieves the above-mentioned object and solves the problem of the prior art, and the operation thereof will be described in detail with reference to the accompanying drawings.

FIG. 2 shows a gas burner combustion apparatus using a metal oxidation catalyst according to the present invention.

The fuel supply pipe 111 is connected to an air supply line 110 to supply air, and the fuel supply pipe 121 is connected to a fuel supply line 120 to supply gas and supplies fuel.
And a mixer 130 for mixing air supplied through the air supply pipe 111 and fuel supplied through the fuel supply pipe 121.
And an air-mixed fuel pipe 131 for supplying the air-mixed fuel mixed by the mixer 130 to the gas burner, and a gas burner 160 for burning the air-mixed fuel supplied through the air-mixed fuel pipe 131. . Further, heat collecting and closing plates 133 for collecting radiant energy such as far infrared rays generated from the gas burner 160 are provided on the four side surfaces of the gas burner 160.

FIG. 3A is a cross-sectional view of an example of a gas burner structure seen from the air-mixed fuel pipe of FIG. 2, and FIG. 3B schematically shows each component of FIG. 3A.

The mixer 130 changes the path between the air supplied through the air supply pipe 111 and the fuel supplied through the fuel supply pipe 121 to form an amorphous spring as a means for thorough mixing of the air and fuel. A screw, a forced mixing fan, or the like can be used, but here, a screw 135 (FIG. 4) is provided inside the mixer 130 in consideration of simplification of production and cost. When the air and the fuel are supplied, the air and the fuel strike the screw 135 and are mixed while changing the path.

The gas burner 160 includes a support 161 for radiating heat combusted by the metal oxidation catalyst generating uncatalyzed reaction activation energy, and a metal oxide catalyst 16 provided below the support 161.
4 and a band-shaped square asbestos having a predetermined thickness as a heat shielding means provided under the protection net 162 to block conduction of heat generated by the metal oxidation catalyst 164. A packing 163, a metal oxidation catalyst 164 provided below the asbestos packing 163, and an initial combustion of fuel supplied through the air-mixed fuel pipe 131 while being provided at a predetermined interval below the metal oxidation catalyst 164 are required. A pre-heater 165 having a heating layer for supplying heat, and a honeycomb-shaped diffusion net surrounding the pre-heater 165 in a honeycomb shape and spreading the fuel burned by the metal oxidation catalyst 164 so as to cover the metal oxidation catalyst 164 below. 166 and a housing 170 mounted on the diffusion net 166, so that the air-mixed fuel supplied through the air-mixed fuel pipe 131 is sealed.

Gas burner 160 through preheater 165
It is possible to automatically adjust the fuel ratio provided in the fuel supply pipe 121 in order to control the fuel supply amount according to the temperature detected by the temperature sensor 150 provided in the gas burner 160 while shutting off after preheating. There is provided an automatic control section 140 comprising a microcomputer which executes a specific application program for controlling the automatic fuel control valve 125 which can be performed. Air supply pipe 111
Is provided with an air control valve 115 for adjusting the amount of air.

FIG. 4 is a sectional view of an example of the mixer shown in FIG.

The metal oxidation catalyst 164 of the gas burner 160 is formed by depositing platinum Pt, palladium, or rhodium on a stainless steel having excellent diffusion and durability. Since the metal oxidation catalyst of the present invention has extremely high durability compared to catalysts using metals such as ceramics and aluminum, it not only significantly reduces costs for repairs and the like, but also has excellent safety.

The present invention is not limited to the above embodiment, and various modifications and applications are possible within the scope of the claims.

[0026]

The gas burner combustion apparatus using the metal oxidation catalyst according to the present invention has high fire safety, enables low-temperature flameless combustion using low-concentration gas fuel, and generates energy such as far infrared rays. By using a metal oxidation catalyst that performs radiant heat transfer and has high thermal efficiency and generates uncatalyzed reaction activation energy, it is possible to provide a gas burner combustion device that uses a metal oxidation catalyst with higher durability.

[Brief description of the drawings]

FIG. 1 is a forced convection diffusion type combustion device using a conventional catalyst device.

FIG. 2 is a gas burner combustion apparatus using a metal oxidation catalyst according to the present invention.

FIG. 3A is a cross-sectional view of an example of a gas burner structure seen from the air-mixed fuel pipe of FIG. 2;

FIG. 3B schematically illustrates each component of FIG. 3A.

FIG. 4 shows a cross-sectional view of an example of the mixer in FIG.

[Explanation of symbols]

 Reference Signs List 110 air supply line 111 air supply pipe 120 fuel supply line 121 fuel supply pipe 125 automatic fuel control valve 130 mixer 131 air mixed fuel pipe 133 heat collecting and shielding plate 135 screw 140 automatic control unit 150 temperature sensor 160 gas burner 161 support 162 Protective net 163 Asbestos packing 164 Metal oxidation catalyst 165 Preheater 166 Diffusion net 170 Housing

Claims (6)

[Claims] An air supply pipe for supplying air, a fuel supply pipe for supplying fuel, a mixer for mixing the supplied air and fuel, and a gas burner for mixing the air-mixed fuel mixed by the mixer. An air-mixed fuel pipe, a gas burner that burns the air-mixed fuel supplied through the air-mixed fuel pipe, and a preheater that preheats the gas burner through a preheating heater, and shuts off the gas burner. An automatic control unit that controls an automatic fuel control valve provided in the fuel supply pipe by adjusting a fuel amount according to a temperature sensed by a sensor, and an air control valve that is provided in the air supply pipe by adjusting an air amount. In the gas burner combustion device, the mixer has means for mixing air and fuel supplied through the air supply pipe and the fuel supply pipe. The gas burner is a support that radiates heat combusted by the metal oxidation catalyst, a protection net provided under the support to protect the metal oxidation catalyst, and the heat generated by the metal oxidation catalyst is A heat blocking means provided on the protection net for blocking conduction, the metal oxidation catalyst provided below the heat blocking means, and a diffusion network for diffusing fuel burned by the metal oxidation catalyst. And a housing mounted on the diffusion net, wherein the heater for preheating is provided at a predetermined interval below the metal oxidation catalyst. 2. The gas burner combustion apparatus using a metal oxidation catalyst according to claim 1, wherein the mixer has a screw or an amorphous spring as a means for mixing air and fuel. 3. The gas burner combustion apparatus using a metal oxidation catalyst according to claim 1, wherein the heat blocking means under the protection net is asbestos packing. 4. The gas burner combustion apparatus using a metal oxidation catalyst according to claim 1, wherein the diffusion network surrounds a heater for preheating. 5. The gas burner combustion apparatus according to claim 4, wherein the metal oxidation catalyst of the gas burner is formed by depositing platinum, palladium, or rhodium on stainless steel. 6. The metal oxidation catalyst according to claim 1, wherein the metal oxidation catalyst of the gas burner is formed by depositing platinum, palladium or rhodium on stainless steel. Gas burner combustion device.