JPS621542Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention has a gas permeable catalyst layer inside the burner body facing the rectangular opening, and a gas permeable catalyst layer located inside the catalyst layer. The present invention relates to a catalytic layer combustion type burner that is provided with a heat insulating material layer and configured to burn fuel gas that has passed through the heat insulating material layer and the catalyst layer by the action of the catalyst layer and by external air.

To configure the above burner, conventionally, as shown in FIG. It was designed to burn by natural mixing with air in the atmosphere. However, when a low oxygen concentration atmosphere is created due to long-term combustion, such as in a naturally ventilated drying room, combustibility deteriorates and sometimes incomplete combustion occurs. In this case, there was a drawback that the combustibility in the central part of the combustion section A deteriorated, especially when the combustion direction A was directed downward.

The purpose of this invention is to ensure good combustion in the entire combustion section, regardless of the installation environment of the burner, the size of the combustion section, and the direction of the combustion section.
The purpose is to make the configuration for this purpose easy to manufacture.

The characteristic configuration of the present invention is that an air pressure feeding pipe is provided along almost the entire length of the long side of the rectangular opening of the burner main body, which is the combustion section, This is because a slit is provided to blow out combustion air in a direction along the surface of the catalyst layer where the reaction occurs.

The effects of the feature structure of the present invention are as follows.

(1) In addition to forcibly supplying combustion air from the slits to the combustion section near the surface of the catalyst layer, the long sides of the rectangular openings are designed to make it easier to uniformly supply the air ejected from the slits to the entire combustion section. By arranging it along almost the entire length of the combustion chamber, a sufficient amount of combustion air can be supplied to the entire combustion section even under a low concentration oxygen atmosphere or even if the combustion section is enlarged or facing downward. Now I can do it reliably and get good combustion.

(2) In order to obtain the above effect (1), for example, if a large number of nozzles are installed in parallel along the sides of the opening, the number of assembly steps will increase, or a uniform combustion air supply will not be possible. Although there are drawbacks such as the need for time and effort to arrange the pipe, if a pipe with slits is used, manufacturing is easy and uniform supply can be achieved, making it suitable for practical use.

Next, an example will be shown with reference to FIGS. 1 and 2.

A pipe 2 for supplying fuel gas such as city gas, natural gas, LPG, etc. is connected to the bottom of the box-shaped burner body 1, and a wire mesh 3 is stretched over the rectangular opening 1a of the burner body 1. A breathable catalyst layer 4 is placed inside the catalyst layer 4, and a breathable heat insulating material layer 5 is placed inside the catalyst layer 4.
A perforated plate 6 is provided inside the heat insulating layer 5, so that the combustion air, that is, the fuel gas mixed with external air, is transferred to the catalyst layer 4 only after the heat insulating layer 5 and the catalyst layer 4 are ventilated. It is configured so that it can be combusted.

A pipe 7 is provided along almost the entire length of the long side of the opening 1a, an air pressure feeding device 8 such as a blower is connected to the pipe 7, and a slit 9 is provided in the pipe 7 along almost the entire length. The combustion air ejected from the slits 9 is made to flow along the surface of the catalyst layer 4 facing downward, so that the combustion air can be uniformly and reliably supplied throughout the combustion section.

Practically preferred width of the slit 9 is about 0.3 mm to 1 mm.

As the catalyst layer 4, an alumina fiber mat supporting a platinum group active metal such as platinum or palladium can be used.

To form the heat insulating material layer 5, for example, silica alumina heat resistant mat or the like can be used.

The specific structure of the burner can be freely changed, and the burner can be used for various purposes.

Next, examples will be shown.

The dimensions of the opening 1a are 500 mm x 300 mm, the width of the slit 9 is 0.5 mm, the distance between the wire mesh 3 and the slit 9 in the fuel gas injection direction is 20 mm, and natural gas is heated under conditions of an atmospheric oxygen concentration of 14%. input
When supplied at 2250 Kcal/cm ² ·Hr, when air in an amount approximately three times the theoretical air amount was blown out from the slit 9, complete combustion could be achieved in the entire combustion section.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a burner according to the present invention, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. 3 is a sectional view of a known burner. DESCRIPTION OF SYMBOLS 1... Burner body, 1a... Opening, 4... Catalyst layer, 5... Heat insulation layer, 7... Pipe, 9... Slit.

Claims (1)

[Scope of utility model registration request] Inside the burner body 1, a breathable catalyst layer 4 is provided facing the rectangular opening 1a, and a breathable heat insulating material layer 5 is provided inside the catalyst layer 4. , a catalytic combustion burner configured to combust the combustion gas that has passed through the heat insulating material layer 5 and the catalyst layer 4 by the action of the catalyst layer 4 and by external air, wherein An air pressure feeding pipe 7 is provided along almost the entire length, and a slit 9 is provided in the pipe 7 almost over the entire length to blow out combustion air in a direction along the surface of the catalyst layer 4. A catalytic layer combustion type burner featuring: