JPS6246982Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to boilers and other forced draft gas combustion devices.

(Prior art) Conventionally, a combustor is constructed using a plurality of elongated gas burners each having a mixing tube section with an air supply port opened at one end, a diffusion chamber connected to the mixing tube, and a flame port section on the front side of the diffusion chamber. A forced draft gas combustion device which is installed at a distance within the main body and which supplies air from the rear side of the gas burner is disclosed in, for example, Japanese Utility Model Application No. 57-195518.

However, in such a combustion device, as the combustion load on each gas burner increases, the amount of ventilation must also increase.

However, since the outer periphery of each gas burner has a complicated uneven shape, when the amount of ventilation is increased, the flow path of the ventilation changes depending on the outer shape of the gas burner, and as a result, it is not possible to supply uniform air to each burner port. According to this, incomplete combustion tends to occur, which is disadvantageous.

(Problems to be Solved by the Invention) The object of the present invention is to obtain a device free from such inconveniences.

(Means for Solving the Problems) The present invention is a longitudinal tube comprising a mixing tube section with an air supply port opened at one end, a diffusion chamber connected to the mixing tube, and a flame port section on the front side of the diffusion chamber. In a combustor of the type in which a plurality of gas burners are installed at intervals within the combustor main body and air is supplied from the back of these gas burners, each gas burner is provided with a sheath body of the same width over the entire length. It consists of

(Example) An example of implementing the present invention will be explained with reference to the drawings.

In the drawings, reference numeral 1 denotes a combustor comprising a heat exchanger 3 in a combustor main body 2 and a plurality of elongated gas burners 4 facing below the combustor main body 2. The gas burners 4 have an air supply port 4a opened at one end. The gas burner 4 includes a mixing tube section 4b, a diffusion chamber 4c connected to the mixing tube section 4b, and a flame opening section 4d on the front side of the diffusion chamber 4c.
There is no particular difference from the conventional example in that an air supply chamber 5 is provided on the back side of the combustion chamber 5, and a turbo fan 6 provided in the air supply chamber 5 ventilates combustion air between these gas burners 4. .

The present invention provides for each gas burner 4 in such a case.
A sheath body 7 of equal width is applied over the entire length,
To explain this in detail, the sheath body 7 is configured to cover both left and right sides as well as both front and rear sides of the gas burner 4, leaving the flame opening portion 4d, and is formed into a flat, substantially rectangular shape as a whole.

In the illustrated embodiment, a slit plate 9 is interposed between the air supply chamber 5 and the combustion chamber 8 formed in the combustor main body 2 to make the air flowing into the combustion chamber 8 uniform. In this case, the slits 9a formed in the slit plate 9 are wide at the center and become narrower toward both sides.

(Function) In this case, when the air supplied from the back side of the gas burner flows between the gas burners, the flow is not disturbed by the external shape of the gas burner.
According to this, ventilation acting as secondary air can be uniformly supplied to each part of the gas burner, and the load on the flame port of each gas burner can be increased.

(Effects) According to the present invention, the gas burners installed at intervals within the combustor main body are covered with sheaths of equal width over the entire length, so that the ventilation passing between the gas burners is controlled by the gas burners. This makes it possible to uniformly ventilate the gas burner without being disturbed by the flame, thereby providing a gas burner that can maintain good combustion even when the flame port load is increased.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. 1 is a cutaway side view, FIG. 2 is a perspective view of the gas burner with a sheath attached, and FIG. 3 is a cutaway sectional view taken along the line -
FIG. 4 is a plan view of the slit plate. 2...Combustor main body, 4...Gas burner, 4a...
...Air supply port, 4b...Mixing pipe section, 4c...Diffusion chamber,
4d...flame mouth part.

Claims (1)

[Scope of utility model registration request] A plurality of long gas burners each having a mixing pipe section with an air supply port opened at one end, a diffusion chamber connected to the mixing pipe, and a flame port section on the front surface of the diffusion chamber are installed at intervals within the combustor main body. A forced draft gas combustion device in which each gas burner is provided with a sheath body of the same width over its entire length, in a combustor of a type in which air is supplied from the back side of the gas burners.