JPH03255806A - Burner device - Google Patents

Abstract

PURPOSE:To obviate the need for a large installation area and reduce the investment cost by rotatably supporting a drive pipe, surrounding a fuel gas feed pipe provided in an air duct, and providing a vane constituting an impeller on said drive pipe to feed combustion air. CONSTITUTION:When a drive pipe 6 is rotated about a fuel gas feed pipe 3 by means of a rotary drive source 9, vanes 8 constituting an impeller 7 rotates, so that the air is sucked from an opening 2a located upstream of an air duct 1 to be forced toward an opening 2b on the downstream side, while fuel gas blows off from a fuel gas blowoff section 4 into the duct 1 through the pipe 3. In this manner, the air fed by the vanes 8 is mixed with the fuel gas blown off from the section 4 to effect combustion and the high temperature combustion gas blows off as a hot gas flow from the opening 2b on the downstream side of the duct 1. At this moment, the amount of the air fed into the duct 1 by the vanes 8 can be increased or decreased by changing the number of revolution of the pipe 6 by means of the source 9. As a result, a blower and an air feed pipe which connects the blower and the air duct are not required, so that a large installation area is not needed and the investment cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a burner device for generating hot air used for, for example, drying or heating.

(Prior Art) For example, most conventional large-capacity burners for generating hot air use a forced draft combustion method, and use a blower to supply combustion air. FIG. 2 is an explanatory diagram of such a conventional burner, in which a fuel gas supply pipe is installed concentrically within the blast pipe a, and a fuel gas jetting part C is provided at the tip of the fuel gas supply pipe. An air supply pipe e connected to the blower d is connected to the rear side of the air supply pipe e. In this configuration, air is forcibly supplied to the rear side of the blast pipe a by the blower d via the air supply pipe e, and mixed with the fuel gas ejected from the fuel gas injection part C via the fuel gas supply pipe. Combustion takes place, and the high-temperature combustion gas generated at this time is blown out from the front side of the blast pipe a and used for drying, heating, etc.

(Problems to be Solved by the Invention) As described above, in the conventional large-capacity burner device, a blower d and an air supply pipe e connecting the blower pipe a with the blower d are essential, so a large installation space is required. , and there is also the problem of high cost.

The present invention aims to solve the above problems.

(Means for Solving the Problems) Means for solving the above problems will be explained with reference to the drawings corresponding to the embodiments. A fuel gas supply pipe 3 is installed in the fuel gas supply pipe 3, and a fuel gas jetting part 4 is provided on the tip side thereof.
A drive pipe 6 is rotatably supported on the outside of the fuel gas supply pipe 3 via a bearing 5, and blades 8 constituting an impeller 7 are provided at one end of the drive pipe 6, and the other end is connected to a rotational drive source. It is connected to 9.

(Function) In the above configuration, when the drive pipe 6 is rotated around the fuel gas supply pipe 3 by the rotary drive source 9, the blades 8 constituting the impeller 7 are rotated, and the upstream side of the blower pipe 1 is rotated. opening 2a of
The air is suctioned and forced into the direction of the opening 2b on the downstream side. On the other hand, the fuel gas is ejected from the fuel gas ejection part 4 into the blower pipe 1 via the fuel gas supply pipe 3 . In this way, feather 8
The air supplied by the air and the fuel gas ejected from the fuel gas ejection part 4 are mixed and combusted, and the high-temperature combustion gas is ejected from the downstream opening 2b of the blast pipe 1 as hot air. This hot air can then be used for drying, heating, etc.

In the above combustion, the amount of air supplied into the blast pipe 1 by the blades 8 can be increased or decreased by increasing or decreasing the rotational speed of the drive pipe 6 rotated by the rotary drive source 9.
Therefore, by increasing or decreasing this rotational speed in accordance with the amount of fuel gas supplied, the air-fuel ratio can be adjusted appropriately, and thus combustion can always be performed at a predetermined air-fuel ratio.

(Example) Next, embodiments of the present invention will be described with reference to the drawings.

In the figure, reference numeral 1 is a blower pipe, both sides of which are open. Reference numerals 2a and 2b indicate upstream and downstream openings, respectively. These openings 2a.

The shape of the opening 2b is arbitrary, such as configuring the opening 2b on the downstream side to have a widening shape as shown in the figure. A fuel gas supply pipe 3 is installed concentrically within the blast pipe 1, and a fuel gas jetting part 4 is provided at the tip side thereof. This fuel gas ejection part 4 is configured to eject fuel gas radially into the blast pipe 1 in a direction perpendicular to its axial direction.

Any suitable configuration may be used, such as a configuration that allows the liquid to be ejected in a direction at an appropriate angle. A drive pipe 6 is rotatably supported on the outside of the fuel gas supply pipe 3 via a bearing 5, and blades 8 constituting an impeller 7 are provided at one end of the drive pipe 6, and the other end is connected to a rotational drive source. In the illustrated example, the blades 8 are provided in the drive pipe 6 so as to constitute a single stage impeller 7, but they can also be provided so as to constitute a multiple stage impeller 7. The shape etc. are also appropriate. Furthermore, in the illustrated example, the winding at the other end of the drive tube 6 is connected to a rotational drive source 9 such as an electric motor via a transmission mechanism 10, but in some cases, it may be connected directly. You can also do that.

In the burner device of the present invention, an appropriate flame-holding mechanism can be configured in the vicinity of the fuel gas jetting part 4, or an appropriate flame-holding mechanism can be configured in the blast pipe 1 on the downstream side. You can also do it.

(Effects of the Invention) As described above, the present invention rotatably supports a drive pipe on the outside of a fuel gas supply pipe installed concentrically in a blower pipe with both sides open, and impellers forming an impeller are attached to this drive pipe. Since the blades can supply a predetermined amount of combustion air, there is no need for a blower and an air supply pipe connecting it to the blower pipe.Therefore, a large installation space is not required, and equipment costs can be reduced. There is an effect that it can be reduced.

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are an explanatory longitudinal sectional view and an explanatory front view, respectively, corresponding to an embodiment of the present invention, and FIG. 2 is an explanatory longitudinal sectional view of a conventional example. Code 1...Blow pipe, 2a, 2b...Opening, 3...
・Fuel gas supply pipe, 4...Fuel gas injection part, 5...
Bearing, 6... Drive pipe, 7... Impeller, 8... Vane, 9... Rotation drive source, 10... Wrap is transmission mechanism. Figure 1 (a) Figure 1 (b) Input diagram

Claims (1)

[Claims] A fuel gas supply pipe is installed concentrically within the blast pipe which is open on both sides, a fuel gas jetting part is provided on the tip side thereof, and a drive pipe is rotatably supported via a bearing on the outside of the fuel gas supply pipe. , a burner device characterized in that one end of the drive tube is provided with blades constituting an impeller, and the other end is connected to a rotational drive source.