JPS5834723B2 - GASTENSHIYOKI - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas combustor in which the configuration of a pilot combustion section is modified.

In a typical gas combustor, a pilot burner is provided separately from the main combustion body to ensure reliable ignition.

In other words, the need for a pilot burner arose from the difficulty of directly igniting a large amount of mixed fuel ejected from the main combustion body, but with a pilot burner installed like this, There was a drawback that the configuration of the combustion section was complicated.

The present invention solves the above-mentioned conventional drawbacks by sharing a part of the main combustion flame port for pilot combustion, and an embodiment thereof will be described below with reference to the accompanying drawings.

Referring to FIGS. 1 to 3, reference numeral 1 denotes a combustion section communicating with a mixing tube 2, with a combustion chamber 3 interposed therebetween and a pair of combustion plates 4, 4' disposed opposite each other.

The combustion plates 4, 4' are constructed by laminating a large number of wire meshes or corrugated plates and flat plates in parallel to the flow of the mixed fuel, and the cut surfaces thereof are set as opposing flame ports 5, 5'.

Further, the base end of the mixing tube 2 is connected to a blower device 6, and a main gas path 7 is exposed halfway inside.

Furthermore, 8 is a pilot gas path, the tip of which opens into a part of one combustion disk 4.

9 is a thermocouple, 10 is a heat exchanger connected to the combustion section 1, 11 is an exhaust case, and 12 is a combustion disk holding member.

In the above configuration, if pilot combustion is to be performed now, gas is allowed to flow through the pilot gas path 8 while the main gas path 7 is shut off, and the blower device 6 is driven.

However, a small amount of gas flowing out from the pilot gas passage 8 flows through a part of the combustion disk 4, mixes with a part of the air sent from the mixing pipe 2, and is ejected from a part of the flame port 5. and burns to form a pilot flame A.

The pilot combustion flame A burns well without causing lift/glowing due to the air ejected from the opposing flame ports 5'.

Next, when the main gas is supplied from the main gas path 7, this main gas mixes with air from the blower 6, is ejected from the flame ports 5, 5' of the combustion wall 4.4', and is ignited by the pilot flame A. be done.

The gas concentration in the mixed fuel forming the pilot flame A during the main combustion is higher than in other parts.

This is because the pilot gas is remixed into the fuel mixture of main gas and air.

That is, during main combustion, the gas concentrations of the mixed fuel ejected from the flame ports 5 and 5' will partially differ.

However, even if, for example, the amount of air blown by the blower 6 changes and the excess air ratio fluctuates, stable combustion is achieved in either the gas concentration or the light concentration, and flame stabilization is performed in the other.

As a result, if the pilot combustion operation is continued during main combustion in this combustor, the stable combustion range will be expanded.

Next, in the case shown in FIGS. 4 and 5, a partition wall 13 is provided in the mixing tube 2 to separately supply air to the pilot combustion area.

This is to ensure that the combustion is carried out even more reliably.

Moreover, what is shown in FIGS. 6 and 7 is an example in which an air branch pipe 14 for pilot combustion is provided in place of the partition wall 13.

As explained above, the present invention supplies pilot gas to a part of the combustion disk, thereby eliminating the need for a conventional pilot burner and making it possible to simplify the configuration of the combustion section and make it more compact.

If the pilot combustion is continued, it is possible to carry out main combustion with different gas concentrations, which is extremely effective in expanding the range of stable combustion.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of a gas combustor showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line II in Fig. 1, and Fig. 3 is a cross-sectional view taken along line II in Fig. 1.
■A sectional view, FIG. 4 is a partially cutaway side view of a gas combustor in another embodiment, FIG. 5 is a sectional view taken along ■--■ in FIG. 4, and FIG. FIG. 7 is a partially cutaway side view of the vessel, and FIG. 7 is a sectional view taken along the line EV-IV in FIG. 6. 4.4'... Combustion disk, 5,5'... Burner port, 8... Pilot gas path.

Claims (1)

[Claims] 1. A gas combustor, characterized in that a pilot gas passage is introduced into a part of a combustion disk that ejects and burns a mixed fuel of gas and combustion air, and pilot combustion is performed in a part of the flame opening of the combustion disk. .