JPH03255804A - Burner device - Google Patents

Abstract

PURPOSE:To obviate the need for a large installation area and reduce the investment cost by providing vanes constituting an impeller in a fuel gas feed pipe disposed concentrically in an air duct having openings on its opposite ends to feed a predetermined amount of combustion air. CONSTITUTION:When a fuel gas feed pipe 3 is rotated by means of a rotary drive source 8, vanes 4 are rotated so that the air is admitted from an opening 2a located upstream of an air duct 1 to send it to an opening 2b on the downstream side, while fuel gas is fed into the pipe 3 via a fuel gas inlet 11 from a fuel gas feed member 10 to be blown off form a fuel gas blow section 5 into the duct 1. In this manner, the air fed by the vanes 4 is mixed with the fuel gas from the section 5 to effect combustion and high temperature combustion gas flows out of the openings 2b as a hot gas flow. The amount of the air fed into the duct 1 by means of the vanes 4 can be increased or decreased by changing number of revolution of the pipe 3 by means of the source 8. As a result, a blower and an air feed pipe connecting the blower and the air duct are not required, with the result that a large installation area is not needed and thereby 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 rotatably installed in the fuel gas supply pipe 3, and a blade 4 constituting an impeller is installed at one end of the fuel gas supply pipe 3.
and a fuel gas ejection part 5 are provided, and the other end is closed and connected to the rotational drive source 8, and on the outside of the fuel gas supply pipe 3,
A fuel gas supply member 10 is provided with an airtight bearing 9 that rotatably supports the fuel gas supply member 10, and a fuel gas inlet 11 is provided at a location of the fuel gas supply pipe 3 corresponding to the fuel gas supply member 10.

(Function) In the above configuration, when the fuel gas supply pipe 3 is rotated by the rotary drive source 8, the blades 4 are rotated together with this, and air is sucked through the opening 2a on the upstream side of the blast pipe 1. It is force-fed toward the opening 2b on the downstream side. On the other hand, the fuel gas is supplied from the fuel gas supply member 10 to the fuel gas supply pipe 3 via the fuel gas inlet X1, and is ejected from the fuel gas ejection part 5 into the blast pipe 1. In this way, the air supplied by the blades 4 and the fuel gas ejected from the fuel gas ejection part 5 are mixed and combusted, and the high temperature combustion gas is released into the downstream opening 2b of the blast pipe l.
It blows out as hot air. The hot air blown out can be used for drying, heating, etc.

In the above combustion, the amount of air supplied into the blast pipe 1 by the blades 4 can be increased or decreased by increasing or decreasing the rotational speed of the fuel gas supply pipe 3 rotated by the rotary drive source 8. By increasing or decreasing the rotation speed according to the amount of fuel gas supplied, the air-fuel ratio can be adjusted appropriately, and thus combustion can always be performed at a predetermined side 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 rotatably installed concentrically within the blast pipe 1, and a vane 4 constituting an impeller and a fuel gas ejection part 5 are provided at one end of the fuel gas supply pipe 3. In the illustrated example, a jet pipe 6 is provided radially protruding from one end of the fuel gas supply pipe 3, and a jet hole 7 is provided on the side of the jet pipe 6 to constitute the fuel gas jet section 5. There is.

In addition, the structure of the fuel gas ejection part 5 can be appropriately configured, such as a structure in which the fuel gas is ejected radially outward from the center side, for example. Further, in the illustrated example, the blades 4 are provided in the fuel gas supply pipe 3 so as to constitute a single stage impeller, but they may also be provided so as to constitute a multi-stage impeller, and the shape etc. may be changed as appropriate. It is.

On the other hand, the other end of the fuel gas supply pipe 3 is closed and connected to a rotational drive source 8, and an airtight bearing 9 is provided on the outside of the fuel gas supply pipe 3 to support it rotatably. A fuel gas supply member 1o is provided. As shown in the figure, the fuel gas supply pipe 3 may be directly connected to a rotational drive source 8 such as an electric motor, or may be connected via an appropriate rotational force transmission mechanism. The fuel gas supply f3
A fuel gas inlet 11 is provided at a location corresponding to the fuel gas supply member 10, and the fuel gas supply member 10 has a fuel gas inlet and a fuel gas inlet connected to the fuel gas supply source.
It consists of 12. In addition, in the burner device of the present invention,
An appropriate flame-holding mechanism may be constructed in the vicinity of the fuel gas jetting portion 5, or an appropriate flame-holding mechanism may be constructed within the blast pipe 1 on the downstream side thereof.

(Effects of the Invention) As described above, the present invention provides vanes constituting an impeller on the fuel gas supply pipe installed concentrically in the blast pipe with openings on both sides, and uses the vanes to supply a predetermined amount of combustion air. This eliminates the need for a blower and an air supply pipe that connects the blower to the blower pipe, thereby eliminating the need for a large installation space and reducing equipment costs.

[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... Vane, 5... Fuel gas ejection part, 6... Ejection pipe, 7... Ejection hole, 8... Rotation drive source, 9... Airtight bearing, 10...・・Fuel gas supply member,
11...Fuel gas inlet, 12...Fuel gas introduction part. Figure 1 (a) Figure 1 (b)

Claims (1)

[Claims] A fuel gas supply pipe is rotatably installed concentrically within a blast pipe with both sides open, and one end of the pipe is provided with impeller-forming blades and a fuel gas ejection part, while the other end is closed and used as a rotational drive source. A fuel gas supply member is provided on the outside of the fuel gas supply pipe and is equipped with an airtight bearing that rotatably supports the fuel gas supply member, and the fuel gas flow is connected to the part of the fuel gas supply pipe that corresponds to the fuel gas supply member. Burner device characterized by having an inlet